Software: Apache/2.2.3 (CentOS). PHP/5.1.6 uname -a: Linux mx-ll-110-164-51-230.static.3bb.co.th 2.6.18-194.el5PAE #1 SMP Fri Apr 2 15:37:44 uid=48(apache) gid=48(apache) groups=48(apache) Safe-mode: OFF (not secure) /usr/share/guile/1.8/ drwxr-xr-x |
Viewing file: guile-procedures.txt (325.83 KB) -rw-r--r-- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) | acons @c snarfed from alist.c:36 @deffn {Scheme Procedure} acons key value alist Add a new key-value pair to @var{alist}. A new pair is created whose car is @var{key} and whose cdr is @var{value}, and the pair is consed onto @var{alist}, and the new list is returned. This function is @emph{not} destructive; @var{alist} is not modified. @end deffn sloppy-assq @c snarfed from alist.c:50 @deffn {Scheme Procedure} sloppy-assq key alist Behaves like @code{assq} but does not do any error checking. Recommended only for use in Guile internals. @end deffn sloppy-assv @c snarfed from alist.c:68 @deffn {Scheme Procedure} sloppy-assv key alist Behaves like @code{assv} but does not do any error checking. Recommended only for use in Guile internals. @end deffn sloppy-assoc @c snarfed from alist.c:86 @deffn {Scheme Procedure} sloppy-assoc key alist Behaves like @code{assoc} but does not do any error checking. Recommended only for use in Guile internals. @end deffn assq @c snarfed from alist.c:113 @deffn {Scheme Procedure} assq key alist @deffnx {Scheme Procedure} assv key alist @deffnx {Scheme Procedure} assoc key alist Fetch the entry in @var{alist} that is associated with @var{key}. To decide whether the argument @var{key} matches a particular entry in @var{alist}, @code{assq} compares keys with @code{eq?}, @code{assv} uses @code{eqv?} and @code{assoc} uses @code{equal?}. If @var{key} cannot be found in @var{alist} (according to whichever equality predicate is in use), then return @code{#f}. These functions return the entire alist entry found (i.e. both the key and the value). @end deffn assv @c snarfed from alist.c:134 @deffn {Scheme Procedure} assv key alist Behaves like @code{assq} but uses @code{eqv?} for key comparison. @end deffn assoc @c snarfed from alist.c:155 @deffn {Scheme Procedure} assoc key alist Behaves like @code{assq} but uses @code{equal?} for key comparison. @end deffn assq-ref @c snarfed from alist.c:199 @deffn {Scheme Procedure} assq-ref alist key @deffnx {Scheme Procedure} assv-ref alist key @deffnx {Scheme Procedure} assoc-ref alist key Like @code{assq}, @code{assv} and @code{assoc}, except that only the value associated with @var{key} in @var{alist} is returned. These functions are equivalent to @lisp (let ((ent (@var{associator} @var{key} @var{alist}))) (and ent (cdr ent))) @end lisp where @var{associator} is one of @code{assq}, @code{assv} or @code{assoc}. @end deffn assv-ref @c snarfed from alist.c:216 @deffn {Scheme Procedure} assv-ref alist key Behaves like @code{assq-ref} but uses @code{eqv?} for key comparison. @end deffn assoc-ref @c snarfed from alist.c:233 @deffn {Scheme Procedure} assoc-ref alist key Behaves like @code{assq-ref} but uses @code{equal?} for key comparison. @end deffn assq-set! @c snarfed from alist.c:262 @deffn {Scheme Procedure} assq-set! alist key val @deffnx {Scheme Procedure} assv-set! alist key value @deffnx {Scheme Procedure} assoc-set! alist key value Reassociate @var{key} in @var{alist} with @var{value}: find any existing @var{alist} entry for @var{key} and associate it with the new @var{value}. If @var{alist} does not contain an entry for @var{key}, add a new one. Return the (possibly new) alist. These functions do not attempt to verify the structure of @var{alist}, and so may cause unusual results if passed an object that is not an association list. @end deffn assv-set! @c snarfed from alist.c:280 @deffn {Scheme Procedure} assv-set! alist key val Behaves like @code{assq-set!} but uses @code{eqv?} for key comparison. @end deffn assoc-set! @c snarfed from alist.c:298 @deffn {Scheme Procedure} assoc-set! alist key val Behaves like @code{assq-set!} but uses @code{equal?} for key comparison. @end deffn assq-remove! @c snarfed from alist.c:322 @deffn {Scheme Procedure} assq-remove! alist key @deffnx {Scheme Procedure} assv-remove! alist key @deffnx {Scheme Procedure} assoc-remove! alist key Delete the first entry in @var{alist} associated with @var{key}, and return the resulting alist. @end deffn assv-remove! @c snarfed from alist.c:338 @deffn {Scheme Procedure} assv-remove! alist key Behaves like @code{assq-remove!} but uses @code{eqv?} for key comparison. @end deffn assoc-remove! @c snarfed from alist.c:354 @deffn {Scheme Procedure} assoc-remove! alist key Behaves like @code{assq-remove!} but uses @code{equal?} for key comparison. @end deffn make-arbiter @c snarfed from arbiters.c:99 @deffn {Scheme Procedure} make-arbiter name Return an arbiter object, initially unlocked. Currently @var{name} is only used for diagnostic output. @end deffn try-arbiter @c snarfed from arbiters.c:116 @deffn {Scheme Procedure} try-arbiter arb If @var{arb} is unlocked, then lock it and return @code{#t}. If @var{arb} is already locked, then do nothing and return @code{#f}. @end deffn release-arbiter @c snarfed from arbiters.c:142 @deffn {Scheme Procedure} release-arbiter arb If @var{arb} is locked, then unlock it and return @code{#t}. If @var{arb} is already unlocked, then do nothing and return @code{#f}. Typical usage is for the thread which locked an arbiter to later release it, but that's not required, any thread can release it. @end deffn async @c snarfed from async.c:97 @deffn {Scheme Procedure} async thunk Create a new async for the procedure @var{thunk}. @end deffn async-mark @c snarfed from async.c:106 @deffn {Scheme Procedure} async-mark a Mark the async @var{a} for future execution. @end deffn run-asyncs @c snarfed from async.c:117 @deffn {Scheme Procedure} run-asyncs list_of_a Execute all thunks from the asyncs of the list @var{list_of_a}. @end deffn system-async @c snarfed from async.c:180 @deffn {Scheme Procedure} system-async thunk This function is deprecated. You can use @var{thunk} directly instead of explicitely creating an async object. @end deffn system-async-mark @c snarfed from async.c:296 @deffn {Scheme Procedure} system-async-mark proc [thread] Mark @var{proc} (a procedure with zero arguments) for future execution in @var{thread}. If @var{proc} has already been marked for @var{thread} but has not been executed yet, this call has no effect. If @var{thread} is omitted, the thread that called @code{system-async-mark} is used. This procedure is not safe to be called from C signal handlers. Use @code{scm_sigaction} or @code{scm_sigaction_for_thread} to install signal handlers. @end deffn noop @c snarfed from async.c:335 @deffn {Scheme Procedure} noop . args Do nothing. When called without arguments, return @code{#f}, otherwise return the first argument. @end deffn unmask-signals @c snarfed from async.c:350 @deffn {Scheme Procedure} unmask-signals Unmask signals. The returned value is not specified. @end deffn mask-signals @c snarfed from async.c:370 @deffn {Scheme Procedure} mask-signals Mask signals. The returned value is not specified. @end deffn call-with-blocked-asyncs @c snarfed from async.c:404 @deffn {Scheme Procedure} call-with-blocked-asyncs proc Call @var{proc} with no arguments and block the execution of system asyncs by one level for the current thread while it is running. Return the value returned by @var{proc}. @end deffn call-with-unblocked-asyncs @c snarfed from async.c:430 @deffn {Scheme Procedure} call-with-unblocked-asyncs proc Call @var{proc} with no arguments and unblock the execution of system asyncs by one level for the current thread while it is running. Return the value returned by @var{proc}. @end deffn display-error @c snarfed from backtrace.c:303 @deffn {Scheme Procedure} display-error stack port subr message args rest Display an error message to the output port @var{port}. @var{stack} is the saved stack for the error, @var{subr} is the name of the procedure in which the error occurred and @var{message} is the actual error message, which may contain formatting instructions. These will format the arguments in the list @var{args} accordingly. @var{rest} is currently ignored. @end deffn display-application @c snarfed from backtrace.c:425 @deffn {Scheme Procedure} display-application frame [port [indent]] Display a procedure application @var{frame} to the output port @var{port}. @var{indent} specifies the indentation of the output. @end deffn display-backtrace @c snarfed from backtrace.c:740 @deffn {Scheme Procedure} display-backtrace stack port [first [depth [highlights]]] Display a backtrace to the output port @var{port}. @var{stack} is the stack to take the backtrace from, @var{first} specifies where in the stack to start and @var{depth} how much frames to display. Both @var{first} and @var{depth} can be @code{#f}, which means that default values will be used. When @var{highlights} is given, it should be a list and all members of it are highligthed in the backtrace. @end deffn backtrace @c snarfed from backtrace.c:776 @deffn {Scheme Procedure} backtrace [highlights] Display a backtrace of the stack saved by the last error to the current output port. When @var{highlights} is given, it should be a list and all members of it are highligthed in the backtrace. @end deffn not @c snarfed from boolean.c:33 @deffn {Scheme Procedure} not x Return @code{#t} iff @var{x} is @code{#f}, else return @code{#f}. @end deffn boolean? @c snarfed from boolean.c:43 @deffn {Scheme Procedure} boolean? obj Return @code{#t} iff @var{obj} is either @code{#t} or @code{#f}. @end deffn char? @c snarfed from chars.c:33 @deffn {Scheme Procedure} char? x Return @code{#t} iff @var{x} is a character, else @code{#f}. @end deffn char=? @c snarfed from chars.c:42 @deffn {Scheme Procedure} char=? x y Return @code{#t} iff @var{x} is the same character as @var{y}, else @code{#f}. @end deffn char<? @c snarfed from chars.c:55 @deffn {Scheme Procedure} char<? x y Return @code{#t} iff @var{x} is less than @var{y} in the ASCII sequence, else @code{#f}. @end deffn char<=? @c snarfed from chars.c:67 @deffn {Scheme Procedure} char<=? x y Return @code{#t} iff @var{x} is less than or equal to @var{y} in the ASCII sequence, else @code{#f}. @end deffn char>? @c snarfed from chars.c:79 @deffn {Scheme Procedure} char>? x y Return @code{#t} iff @var{x} is greater than @var{y} in the ASCII sequence, else @code{#f}. @end deffn char>=? @c snarfed from chars.c:91 @deffn {Scheme Procedure} char>=? x y Return @code{#t} iff @var{x} is greater than or equal to @var{y} in the ASCII sequence, else @code{#f}. @end deffn char-ci=? @c snarfed from chars.c:103 @deffn {Scheme Procedure} char-ci=? x y Return @code{#t} iff @var{x} is the same character as @var{y} ignoring case, else @code{#f}. @end deffn char-ci<? @c snarfed from chars.c:115 @deffn {Scheme Procedure} char-ci<? x y Return @code{#t} iff @var{x} is less than @var{y} in the ASCII sequence ignoring case, else @code{#f}. @end deffn char-ci<=? @c snarfed from chars.c:127 @deffn {Scheme Procedure} char-ci<=? x y Return @code{#t} iff @var{x} is less than or equal to @var{y} in the ASCII sequence ignoring case, else @code{#f}. @end deffn char-ci>? @c snarfed from chars.c:139 @deffn {Scheme Procedure} char-ci>? x y Return @code{#t} iff @var{x} is greater than @var{y} in the ASCII sequence ignoring case, else @code{#f}. @end deffn char-ci>=? @c snarfed from chars.c:151 @deffn {Scheme Procedure} char-ci>=? x y Return @code{#t} iff @var{x} is greater than or equal to @var{y} in the ASCII sequence ignoring case, else @code{#f}. @end deffn char-alphabetic? @c snarfed from chars.c:163 @deffn {Scheme Procedure} char-alphabetic? chr Return @code{#t} iff @var{chr} is alphabetic, else @code{#f}. @end deffn char-numeric? @c snarfed from chars.c:172 @deffn {Scheme Procedure} char-numeric? chr Return @code{#t} iff @var{chr} is numeric, else @code{#f}. @end deffn char-whitespace? @c snarfed from chars.c:181 @deffn {Scheme Procedure} char-whitespace? chr Return @code{#t} iff @var{chr} is whitespace, else @code{#f}. @end deffn char-upper-case? @c snarfed from chars.c:192 @deffn {Scheme Procedure} char-upper-case? chr Return @code{#t} iff @var{chr} is uppercase, else @code{#f}. @end deffn char-lower-case? @c snarfed from chars.c:202 @deffn {Scheme Procedure} char-lower-case? chr Return @code{#t} iff @var{chr} is lowercase, else @code{#f}. @end deffn char-is-both? @c snarfed from chars.c:213 @deffn {Scheme Procedure} char-is-both? chr Return @code{#t} iff @var{chr} is either uppercase or lowercase, else @code{#f}. @end deffn char->integer @c snarfed from chars.c:228 @deffn {Scheme Procedure} char->integer chr Return the number corresponding to ordinal position of @var{chr} in the ASCII sequence. @end deffn integer->char @c snarfed from chars.c:240 @deffn {Scheme Procedure} integer->char n Return the character at position @var{n} in the ASCII sequence. @end deffn char-upcase @c snarfed from chars.c:250 @deffn {Scheme Procedure} char-upcase chr Return the uppercase character version of @var{chr}. @end deffn char-downcase @c snarfed from chars.c:261 @deffn {Scheme Procedure} char-downcase chr Return the lowercase character version of @var{chr}. @end deffn with-continuation-barrier @c snarfed from continuations.c:418 @deffn {Scheme Procedure} with-continuation-barrier proc Call @var{proc} and return its result. Do not allow the invocation of continuations that would leave or enter the dynamic extent of the call to @code{with-continuation-barrier}. Such an attempt causes an error to be signaled. Throws (such as errors) that are not caught from within @var{proc} are caught by @code{with-continuation-barrier}. In that case, a short message is printed to the current error port and @code{#f} is returned. Thus, @code{with-continuation-barrier} returns exactly once. @end deffn debug-options-interface @c snarfed from debug.c:54 @deffn {Scheme Procedure} debug-options-interface [setting] Option interface for the debug options. Instead of using this procedure directly, use the procedures @code{debug-enable}, @code{debug-disable}, @code{debug-set!} and @code{debug-options}. @end deffn with-traps @c snarfed from debug.c:101 @deffn {Scheme Procedure} with-traps thunk Call @var{thunk} with traps enabled. @end deffn memoized? @c snarfed from debug.c:139 @deffn {Scheme Procedure} memoized? obj Return @code{#t} if @var{obj} is memoized. @end deffn unmemoize-expr @c snarfed from debug.c:271 @deffn {Scheme Procedure} unmemoize-expr m Unmemoize the memoized expression @var{m}, @end deffn memoized-environment @c snarfed from debug.c:281 @deffn {Scheme Procedure} memoized-environment m Return the environment of the memoized expression @var{m}. @end deffn procedure-name @c snarfed from debug.c:291 @deffn {Scheme Procedure} procedure-name proc Return the name of the procedure @var{proc} @end deffn procedure-source @c snarfed from debug.c:317 @deffn {Scheme Procedure} procedure-source proc Return the source of the procedure @var{proc}. @end deffn procedure-environment @c snarfed from debug.c:374 @deffn {Scheme Procedure} procedure-environment proc Return the environment of the procedure @var{proc}. @end deffn local-eval @c snarfed from debug.c:406 @deffn {Scheme Procedure} local-eval exp [env] Evaluate @var{exp} in its environment. If @var{env} is supplied, it is the environment in which to evaluate @var{exp}. Otherwise, @var{exp} must be a memoized code object (in which case, its environment is implicit). @end deffn debug-object? @c snarfed from debug.c:493 @deffn {Scheme Procedure} debug-object? obj Return @code{#t} if @var{obj} is a debug object. @end deffn issue-deprecation-warning @c snarfed from deprecation.c:99 @deffn {Scheme Procedure} issue-deprecation-warning . msgs Output @var{msgs} to @code{(current-error-port)} when this is the first call to @code{issue-deprecation-warning} with this specific @var{msgs}. Do nothing otherwise. The argument @var{msgs} should be a list of strings; they are printed in turn, each one followed by a newline. @end deffn include-deprecated-features @c snarfed from deprecation.c:144 @deffn {Scheme Procedure} include-deprecated-features Return @code{#t} iff deprecated features should be included in public interfaces. @end deffn substring-move-left! @c snarfed from deprecated.c:73 @deffn {Scheme Procedure} substring-move-left! implemented by the C function "scm_substring_move_x" @end deffn substring-move-right! @c snarfed from deprecated.c:75 @deffn {Scheme Procedure} substring-move-right! implemented by the C function "scm_substring_move_x" @end deffn c-registered-modules @c snarfed from deprecated.c:178 @deffn {Scheme Procedure} c-registered-modules Return a list of the object code modules that have been imported into the current Guile process. Each element of the list is a pair whose car is the name of the module, and whose cdr is the function handle for that module's initializer function. The name is the string that has been passed to scm_register_module_xxx. @end deffn c-clear-registered-modules @c snarfed from deprecated.c:199 @deffn {Scheme Procedure} c-clear-registered-modules Destroy the list of modules registered with the current Guile process. The return value is unspecified. @strong{Warning:} this function does not actually unlink or deallocate these modules, but only destroys the records of which modules have been loaded. It should therefore be used only by module bookkeeping operations. @end deffn close-all-ports-except @c snarfed from deprecated.c:342 @deffn {Scheme Procedure} close-all-ports-except . ports [DEPRECATED] Close all open file ports used by the interpreter except for those supplied as arguments. This procedure was intended to be used before an exec call to close file descriptors which are not needed in the new process. However it has the undesirable side effect of flushing buffers, so it's deprecated. Use port-for-each instead. @end deffn variable-set-name-hint! @c snarfed from deprecated.c:359 @deffn {Scheme Procedure} variable-set-name-hint! var hint Do not use this function. @end deffn builtin-variable @c snarfed from deprecated.c:372 @deffn {Scheme Procedure} builtin-variable name Do not use this function. @end deffn sloppy-memq @c snarfed from deprecated.c:446 @deffn {Scheme Procedure} sloppy-memq x lst This procedure behaves like @code{memq}, but does no type or error checking. Its use is recommended only in writing Guile internals, not for high-level Scheme programs. @end deffn sloppy-memv @c snarfed from deprecated.c:466 @deffn {Scheme Procedure} sloppy-memv x lst This procedure behaves like @code{memv}, but does no type or error checking. Its use is recommended only in writing Guile internals, not for high-level Scheme programs. @end deffn sloppy-member @c snarfed from deprecated.c:486 @deffn {Scheme Procedure} sloppy-member x lst This procedure behaves like @code{member}, but does no type or error checking. Its use is recommended only in writing Guile internals, not for high-level Scheme programs. @end deffn read-and-eval! @c snarfed from deprecated.c:508 @deffn {Scheme Procedure} read-and-eval! [port] Read a form from @var{port} (standard input by default), and evaluate it (memoizing it in the process) in the top-level environment. If no data is left to be read from @var{port}, an @code{end-of-file} error is signalled. @end deffn string->obarray-symbol @c snarfed from deprecated.c:825 @deffn {Scheme Procedure} string->obarray-symbol o s [softp] Intern a new symbol in @var{obarray}, a symbol table, with name @var{string}. If @var{obarray} is @code{#f}, use the default system symbol table. If @var{obarray} is @code{#t}, the symbol should not be interned in any symbol table; merely return the pair (@var{symbol} . @var{#<undefined>}). The @var{soft?} argument determines whether new symbol table entries should be created when the specified symbol is not already present in @var{obarray}. If @var{soft?} is specified and is a true value, then new entries should not be added for symbols not already present in the table; instead, simply return @code{#f}. @end deffn intern-symbol @c snarfed from deprecated.c:863 @deffn {Scheme Procedure} intern-symbol o s Add a new symbol to @var{obarray} with name @var{string}, bound to an unspecified initial value. The symbol table is not modified if a symbol with this name is already present. @end deffn unintern-symbol @c snarfed from deprecated.c:905 @deffn {Scheme Procedure} unintern-symbol o s Remove the symbol with name @var{string} from @var{obarray}. This function returns @code{#t} if the symbol was present and @code{#f} otherwise. @end deffn symbol-binding @c snarfed from deprecated.c:950 @deffn {Scheme Procedure} symbol-binding o s Look up in @var{obarray} the symbol whose name is @var{string}, and return the value to which it is bound. If @var{obarray} is @code{#f}, use the global symbol table. If @var{string} is not interned in @var{obarray}, an error is signalled. @end deffn symbol-bound? @c snarfed from deprecated.c:1003 @deffn {Scheme Procedure} symbol-bound? o s Return @code{#t} if @var{obarray} contains a symbol with name @var{string} bound to a defined value. This differs from @var{symbol-interned?} in that the mere mention of a symbol usually causes it to be interned; @code{symbol-bound?} determines whether a symbol has been given any meaningful value. @end deffn symbol-set! @c snarfed from deprecated.c:1030 @deffn {Scheme Procedure} symbol-set! o s v Find the symbol in @var{obarray} whose name is @var{string}, and rebind it to @var{value}. An error is signalled if @var{string} is not present in @var{obarray}. @end deffn gentemp @c snarfed from deprecated.c:1063 @deffn {Scheme Procedure} gentemp [prefix [obarray]] Create a new symbol with a name unique in an obarray. The name is constructed from an optional string @var{prefix} and a counter value. The default prefix is @code{t}. The @var{obarray} is specified as a second optional argument. Default is the system obarray where all normal symbols are interned. The counter is increased by 1 at each call. There is no provision for resetting the counter. @end deffn guardian-destroyed? @c snarfed from deprecated.c:1462 @deffn {Scheme Procedure} guardian-destroyed? guardian Return @code{#t} if @var{guardian} has been destroyed, otherwise @code{#f}. @end deffn guardian-greedy? @c snarfed from deprecated.c:1473 @deffn {Scheme Procedure} guardian-greedy? guardian Return @code{#t} if @var{guardian} is a greedy guardian, otherwise @code{#f}. @end deffn destroy-guardian! @c snarfed from deprecated.c:1486 @deffn {Scheme Procedure} destroy-guardian! guardian Destroys @var{guardian}, by making it impossible to put any more objects in it or get any objects from it. It also unguards any objects guarded by @var{guardian}. @end deffn make-keyword-from-dash-symbol @c snarfed from discouraged.c:161 @deffn {Scheme Procedure} make-keyword-from-dash-symbol symbol Make a keyword object from a @var{symbol} that starts with a dash. @end deffn keyword-dash-symbol @c snarfed from discouraged.c:183 @deffn {Scheme Procedure} keyword-dash-symbol keyword Return the dash symbol for @var{keyword}. This is the inverse of @code{make-keyword-from-dash-symbol}. @end deffn dynamic-link @c snarfed from dynl.c:150 @deffn {Scheme Procedure} dynamic-link filename Find the shared object (shared library) denoted by @var{filename} and link it into the running Guile application. The returned scheme object is a ``handle'' for the library which can be passed to @code{dynamic-func}, @code{dynamic-call} etc. Searching for object files is system dependent. Normally, if @var{filename} does have an explicit directory it will be searched for in locations such as @file{/usr/lib} and @file{/usr/local/lib}. @end deffn dynamic-object? @c snarfed from dynl.c:169 @deffn {Scheme Procedure} dynamic-object? obj Return @code{#t} if @var{obj} is a dynamic object handle, or @code{#f} otherwise. @end deffn dynamic-unlink @c snarfed from dynl.c:183 @deffn {Scheme Procedure} dynamic-unlink dobj Unlink a dynamic object from the application, if possible. The object must have been linked by @code{dynamic-link}, with @var{dobj} the corresponding handle. After this procedure is called, the handle can no longer be used to access the object. @end deffn dynamic-func @c snarfed from dynl.c:208 @deffn {Scheme Procedure} dynamic-func name dobj Return a ``handle'' for the function @var{name} in the shared object referred to by @var{dobj}. The handle can be passed to @code{dynamic-call} to actually call the function. Regardless whether your C compiler prepends an underscore @samp{_} to the global names in a program, you should @strong{not} include this underscore in @var{name} since it will be added automatically when necessary. @end deffn dynamic-call @c snarfed from dynl.c:254 @deffn {Scheme Procedure} dynamic-call func dobj Call a C function in a dynamic object. Two styles of invocation are supported: @itemize @bullet @item @var{func} can be a function handle returned by @code{dynamic-func}. In this case @var{dobj} is ignored @item @var{func} can be a string with the name of the function to call, with @var{dobj} the handle of the dynamic object in which to find the function. This is equivalent to @smallexample (dynamic-call (dynamic-func @var{func} @var{dobj}) #f) @end smallexample @end itemize In either case, the function is passed no arguments and its return value is ignored. @end deffn dynamic-args-call @c snarfed from dynl.c:286 @deffn {Scheme Procedure} dynamic-args-call func dobj args Call the C function indicated by @var{func} and @var{dobj}, just like @code{dynamic-call}, but pass it some arguments and return its return value. The C function is expected to take two arguments and return an @code{int}, just like @code{main}: @smallexample int c_func (int argc, char **argv); @end smallexample The parameter @var{args} must be a list of strings and is converted into an array of @code{char *}. The array is passed in @var{argv} and its size in @var{argc}. The return value is converted to a Scheme number and returned from the call to @code{dynamic-args-call}. @end deffn dynamic-wind @c snarfed from dynwind.c:97 @deffn {Scheme Procedure} dynamic-wind in_guard thunk out_guard All three arguments must be 0-argument procedures. @var{in_guard} is called, then @var{thunk}, then @var{out_guard}. If, any time during the execution of @var{thunk}, the continuation of the @code{dynamic_wind} expression is escaped non-locally, @var{out_guard} is called. If the continuation of the dynamic-wind is re-entered, @var{in_guard} is called. Thus @var{in_guard} and @var{out_guard} may be called any number of times. @lisp (define x 'normal-binding) @result{} x (define a-cont (call-with-current-continuation (lambda (escape) (let ((old-x x)) (dynamic-wind ;; in-guard: ;; (lambda () (set! x 'special-binding)) ;; thunk ;; (lambda () (display x) (newline) (call-with-current-continuation escape) (display x) (newline) x) ;; out-guard: ;; (lambda () (set! x old-x))))))) ;; Prints: special-binding ;; Evaluates to: @result{} a-cont x @result{} normal-binding (a-cont #f) ;; Prints: special-binding ;; Evaluates to: @result{} a-cont ;; the value of the (define a-cont...) x @result{} normal-binding a-cont @result{} special-binding @end lisp @end deffn environment? @c snarfed from environments.c:106 @deffn {Scheme Procedure} environment? obj Return @code{#t} if @var{obj} is an environment, or @code{#f} otherwise. @end deffn environment-bound? @c snarfed from environments.c:117 @deffn {Scheme Procedure} environment-bound? env sym Return @code{#t} if @var{sym} is bound in @var{env}, or @code{#f} otherwise. @end deffn environment-ref @c snarfed from environments.c:132 @deffn {Scheme Procedure} environment-ref env sym Return the value of the location bound to @var{sym} in @var{env}. If @var{sym} is unbound in @var{env}, signal an @code{environment:unbound} error. @end deffn environment-fold @c snarfed from environments.c:202 @deffn {Scheme Procedure} environment-fold env proc init Iterate over all the bindings in @var{env}, accumulating some value. For each binding in @var{env}, apply @var{proc} to the symbol bound, its value, and the result from the previous application of @var{proc}. Use @var{init} as @var{proc}'s third argument the first time @var{proc} is applied. If @var{env} contains no bindings, this function simply returns @var{init}. If @var{env} binds the symbol sym1 to the value val1, sym2 to val2, and so on, then this procedure computes: @lisp (proc sym1 val1 (proc sym2 val2 ... (proc symn valn init))) @end lisp Each binding in @var{env} will be processed exactly once. @code{environment-fold} makes no guarantees about the order in which the bindings are processed. Here is a function which, given an environment, constructs an association list representing that environment's bindings, using environment-fold: @lisp (define (environment->alist env) (environment-fold env (lambda (sym val tail) (cons (cons sym val) tail)) '())) @end lisp @end deffn environment-define @c snarfed from environments.c:237 @deffn {Scheme Procedure} environment-define env sym val Bind @var{sym} to a new location containing @var{val} in @var{env}. If @var{sym} is already bound to another location in @var{env} and the binding is mutable, that binding is replaced. The new binding and location are both mutable. The return value is unspecified. If @var{sym} is already bound in @var{env}, and the binding is immutable, signal an @code{environment:immutable-binding} error. @end deffn environment-undefine @c snarfed from environments.c:263 @deffn {Scheme Procedure} environment-undefine env sym Remove any binding for @var{sym} from @var{env}. If @var{sym} is unbound in @var{env}, do nothing. The return value is unspecified. If @var{sym} is already bound in @var{env}, and the binding is immutable, signal an @code{environment:immutable-binding} error. @end deffn environment-set! @c snarfed from environments.c:291 @deffn {Scheme Procedure} environment-set! env sym val If @var{env} binds @var{sym} to some location, change that location's value to @var{val}. The return value is unspecified. If @var{sym} is not bound in @var{env}, signal an @code{environment:unbound} error. If @var{env} binds @var{sym} to an immutable location, signal an @code{environment:immutable-location} error. @end deffn environment-cell @c snarfed from environments.c:326 @deffn {Scheme Procedure} environment-cell env sym for_write Return the value cell which @var{env} binds to @var{sym}, or @code{#f} if the binding does not live in a value cell. The argument @var{for-write} indicates whether the caller intends to modify the variable's value by mutating the value cell. If the variable is immutable, then @code{environment-cell} signals an @code{environment:immutable-location} error. If @var{sym} is unbound in @var{env}, signal an @code{environment:unbound} error. If you use this function, you should consider using @code{environment-observe}, to be notified when @var{sym} gets re-bound to a new value cell, or becomes undefined. @end deffn environment-observe @c snarfed from environments.c:378 @deffn {Scheme Procedure} environment-observe env proc Whenever @var{env}'s bindings change, apply @var{proc} to @var{env}. This function returns an object, token, which you can pass to @code{environment-unobserve} to remove @var{proc} from the set of procedures observing @var{env}. The type and value of token is unspecified. @end deffn environment-observe-weak @c snarfed from environments.c:395 @deffn {Scheme Procedure} environment-observe-weak env proc This function is the same as environment-observe, except that the reference @var{env} retains to @var{proc} is a weak reference. This means that, if there are no other live, non-weak references to @var{proc}, it will be garbage-collected, and dropped from @var{env}'s list of observing procedures. @end deffn environment-unobserve @c snarfed from environments.c:431 @deffn {Scheme Procedure} environment-unobserve token Cancel the observation request which returned the value @var{token}. The return value is unspecified. If a call @code{(environment-observe env proc)} returns @var{token}, then the call @code{(environment-unobserve token)} will cause @var{proc} to no longer be called when @var{env}'s bindings change. @end deffn make-leaf-environment @c snarfed from environments.c:1018 @deffn {Scheme Procedure} make-leaf-environment Create a new leaf environment, containing no bindings. All bindings and locations created in the new environment will be mutable. @end deffn leaf-environment? @c snarfed from environments.c:1041 @deffn {Scheme Procedure} leaf-environment? object Return @code{#t} if object is a leaf environment, or @code{#f} otherwise. @end deffn make-eval-environment @c snarfed from environments.c:1406 @deffn {Scheme Procedure} make-eval-environment local imported Return a new environment object eval whose bindings are the union of the bindings in the environments @var{local} and @var{imported}, with bindings from @var{local} taking precedence. Definitions made in eval are placed in @var{local}. Applying @code{environment-define} or @code{environment-undefine} to eval has the same effect as applying the procedure to @var{local}. Note that eval incorporates @var{local} and @var{imported} by reference: If, after creating eval, the program changes the bindings of @var{local} or @var{imported}, those changes will be visible in eval. Since most Scheme evaluation takes place in eval environments, they transparently cache the bindings received from @var{local} and @var{imported}. Thus, the first time the program looks up a symbol in eval, eval may make calls to @var{local} or @var{imported} to find their bindings, but subsequent references to that symbol will be as fast as references to bindings in finite environments. In typical use, @var{local} will be a finite environment, and @var{imported} will be an import environment @end deffn eval-environment? @c snarfed from environments.c:1443 @deffn {Scheme Procedure} eval-environment? object Return @code{#t} if object is an eval environment, or @code{#f} otherwise. @end deffn eval-environment-local @c snarfed from environments.c:1453 @deffn {Scheme Procedure} eval-environment-local env Return the local environment of eval environment @var{env}. @end deffn eval-environment-set-local! @c snarfed from environments.c:1465 @deffn {Scheme Procedure} eval-environment-set-local! env local Change @var{env}'s local environment to @var{local}. @end deffn eval-environment-imported @c snarfed from environments.c:1491 @deffn {Scheme Procedure} eval-environment-imported env Return the imported environment of eval environment @var{env}. @end deffn eval-environment-set-imported! @c snarfed from environments.c:1503 @deffn {Scheme Procedure} eval-environment-set-imported! env imported Change @var{env}'s imported environment to @var{imported}. @end deffn make-import-environment @c snarfed from environments.c:1826 @deffn {Scheme Procedure} make-import-environment imports conflict_proc Return a new environment @var{imp} whose bindings are the union of the bindings from the environments in @var{imports}; @var{imports} must be a list of environments. That is, @var{imp} binds a symbol to a location when some element of @var{imports} does. If two different elements of @var{imports} have a binding for the same symbol, the @var{conflict-proc} is called with the following parameters: the import environment, the symbol and the list of the imported environments that bind the symbol. If the @var{conflict-proc} returns an environment @var{env}, the conflict is considered as resolved and the binding from @var{env} is used. If the @var{conflict-proc} returns some non-environment object, the conflict is considered unresolved and the symbol is treated as unspecified in the import environment. The checking for conflicts may be performed lazily, i. e. at the moment when a value or binding for a certain symbol is requested instead of the moment when the environment is created or the bindings of the imports change. All bindings in @var{imp} are immutable. If you apply @code{environment-define} or @code{environment-undefine} to @var{imp}, Guile will signal an @code{environment:immutable-binding} error. However, notice that the set of bindings in @var{imp} may still change, if one of its imported environments changes. @end deffn import-environment? @c snarfed from environments.c:1855 @deffn {Scheme Procedure} import-environment? object Return @code{#t} if object is an import environment, or @code{#f} otherwise. @end deffn import-environment-imports @c snarfed from environments.c:1866 @deffn {Scheme Procedure} import-environment-imports env Return the list of environments imported by the import environment @var{env}. @end deffn import-environment-set-imports! @c snarfed from environments.c:1879 @deffn {Scheme Procedure} import-environment-set-imports! env imports Change @var{env}'s list of imported environments to @var{imports}, and check for conflicts. @end deffn make-export-environment @c snarfed from environments.c:2146 @deffn {Scheme Procedure} make-export-environment private signature Return a new environment @var{exp} containing only those bindings in private whose symbols are present in @var{signature}. The @var{private} argument must be an environment. The environment @var{exp} binds symbol to location when @var{env} does, and symbol is exported by @var{signature}. @var{signature} is a list specifying which of the bindings in @var{private} should be visible in @var{exp}. Each element of @var{signature} should be a list of the form: (symbol attribute ...) where each attribute is one of the following: @table @asis @item the symbol @code{mutable-location} @var{exp} should treat the location bound to symbol as mutable. That is, @var{exp} will pass calls to @code{environment-set!} or @code{environment-cell} directly through to private. @item the symbol @code{immutable-location} @var{exp} should treat the location bound to symbol as immutable. If the program applies @code{environment-set!} to @var{exp} and symbol, or calls @code{environment-cell} to obtain a writable value cell, @code{environment-set!} will signal an @code{environment:immutable-location} error. Note that, even if an export environment treats a location as immutable, the underlying environment may treat it as mutable, so its value may change. @end table It is an error for an element of signature to specify both @code{mutable-location} and @code{immutable-location}. If neither is specified, @code{immutable-location} is assumed. As a special case, if an element of signature is a lone symbol @var{sym}, it is equivalent to an element of the form @code{(sym)}. All bindings in @var{exp} are immutable. If you apply @code{environment-define} or @code{environment-undefine} to @var{exp}, Guile will signal an @code{environment:immutable-binding} error. However, notice that the set of bindings in @var{exp} may still change, if the bindings in private change. @end deffn export-environment? @c snarfed from environments.c:2181 @deffn {Scheme Procedure} export-environment? object Return @code{#t} if object is an export environment, or @code{#f} otherwise. @end deffn export-environment-private @c snarfed from environments.c:2191 @deffn {Scheme Procedure} export-environment-private env Return the private environment of export environment @var{env}. @end deffn export-environment-set-private! @c snarfed from environments.c:2203 @deffn {Scheme Procedure} export-environment-set-private! env private Change the private environment of export environment @var{env}. @end deffn export-environment-signature @c snarfed from environments.c:2225 @deffn {Scheme Procedure} export-environment-signature env Return the signature of export environment @var{env}. @end deffn export-environment-set-signature! @c snarfed from environments.c:2299 @deffn {Scheme Procedure} export-environment-set-signature! env signature Change the signature of export environment @var{env}. @end deffn eq? @c snarfed from eq.c:85 @deffn {Scheme Procedure} eq? x y Return @code{#t} if @var{x} and @var{y} are the same object, except for numbers and characters. For example, @example (define x (vector 1 2 3)) (define y (vector 1 2 3)) (eq? x x) @result{} #t (eq? x y) @result{} #f @end example Numbers and characters are not equal to any other object, but the problem is they're not necessarily @code{eq?} to themselves either. This is even so when the number comes directly from a variable, @example (let ((n (+ 2 3))) (eq? n n)) @result{} *unspecified* @end example Generally @code{eqv?} should be used when comparing numbers or characters. @code{=} or @code{char=?} can be used too. It's worth noting that end-of-list @code{()}, @code{#t}, @code{#f}, a symbol of a given name, and a keyword of a given name, are unique objects. There's just one of each, so for instance no matter how @code{()} arises in a program, it's the same object and can be compared with @code{eq?}, @example (define x (cdr '(123))) (define y (cdr '(456))) (eq? x y) @result{} #t (define x (string->symbol "foo")) (eq? x 'foo) @result{} #t @end example @end deffn eqv? @c snarfed from eq.c:120 @deffn {Scheme Procedure} eqv? x y Return @code{#t} if @var{x} and @var{y} are the same object, or for characters and numbers the same value. On objects except characters and numbers, @code{eqv?} is the same as @code{eq?}, it's true if @var{x} and @var{y} are the same object. If @var{x} and @var{y} are numbers or characters, @code{eqv?} compares their type and value. An exact number is not @code{eqv?} to an inexact number (even if their value is the same). @example (eqv? 3 (+ 1 2)) @result{} #t (eqv? 1 1.0) @result{} #f @end example @end deffn equal? @c snarfed from eq.c:216 @deffn {Scheme Procedure} equal? x y Return @code{#t} if @var{x} and @var{y} are the same type, and their contents or value are equal. For a pair, string, vector or array, @code{equal?} compares the contents, and does so using using the same @code{equal?} recursively, so a deep structure can be traversed. @example (equal? (list 1 2 3) (list 1 2 3)) @result{} #t (equal? (list 1 2 3) (vector 1 2 3)) @result{} #f @end example For other objects, @code{equal?} compares as per @code{eqv?}, which means characters and numbers are compared by type and value (and like @code{eqv?}, exact and inexact numbers are not @code{equal?}, even if their value is the same). @example (equal? 3 (+ 1 2)) @result{} #t (equal? 1 1.0) @result{} #f @end example Hash tables are currently only compared as per @code{eq?}, so two different tables are not @code{equal?}, even if their contents are the same. @code{equal?} does not support circular data structures, it may go into an infinite loop if asked to compare two circular lists or similar. New application-defined object types (Smobs) have an @code{equalp} handler which is called by @code{equal?}. This lets an application traverse the contents or control what is considered @code{equal?} for two such objects. If there's no handler, the default is to just compare as per @code{eq?}. @end deffn scm-error @c snarfed from error.c:82 @deffn {Scheme Procedure} scm-error key subr message args data Raise an error with key @var{key}. @var{subr} can be a string naming the procedure associated with the error, or @code{#f}. @var{message} is the error message string, possibly containing @code{~S} and @code{~A} escapes. When an error is reported, these are replaced by formatting the corresponding members of @var{args}: @code{~A} (was @code{%s} in older versions of Guile) formats using @code{display} and @code{~S} (was @code{%S}) formats using @code{write}. @var{data} is a list or @code{#f} depending on @var{key}: if @var{key} is @code{system-error} then it should be a list containing the Unix @code{errno} value; If @var{key} is @code{signal} then it should be a list containing the Unix signal number; If @var{key} is @code{out-of-range} or @code{wrong-type-arg}, it is a list containing the bad value; otherwise it will usually be @code{#f}. @end deffn strerror @c snarfed from error.c:129 @deffn {Scheme Procedure} strerror err Return the Unix error message corresponding to @var{err}, which must be an integer value. @end deffn apply:nconc2last @c snarfed from eval.c:4734 @deffn {Scheme Procedure} apply:nconc2last lst Given a list (@var{arg1} @dots{} @var{args}), this function conses the @var{arg1} @dots{} arguments onto the front of @var{args}, and returns the resulting list. Note that @var{args} is a list; thus, the argument to this function is a list whose last element is a list. Note: Rather than do new consing, @code{apply:nconc2last} destroys its argument, so use with care. @end deffn force @c snarfed from eval.c:5623 @deffn {Scheme Procedure} force promise If the promise @var{x} has not been computed yet, compute and return @var{x}, otherwise just return the previously computed value. @end deffn promise? @c snarfed from eval.c:5646 @deffn {Scheme Procedure} promise? obj Return true if @var{obj} is a promise, i.e. a delayed computation (@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}). @end deffn cons-source @c snarfed from eval.c:5658 @deffn {Scheme Procedure} cons-source xorig x y Create and return a new pair whose car and cdr are @var{x} and @var{y}. Any source properties associated with @var{xorig} are also associated with the new pair. @end deffn copy-tree @c snarfed from eval.c:5815 @deffn {Scheme Procedure} copy-tree obj Recursively copy the data tree that is bound to @var{obj}, and return a the new data structure. @code{copy-tree} recurses down the contents of both pairs and vectors (since both cons cells and vector cells may point to arbitrary objects), and stops recursing when it hits any other object. @end deffn primitive-eval @c snarfed from eval.c:5903 @deffn {Scheme Procedure} primitive-eval exp Evaluate @var{exp} in the top-level environment specified by the current module. @end deffn eval @c snarfed from eval.c:5947 @deffn {Scheme Procedure} eval exp module_or_state Evaluate @var{exp}, a list representing a Scheme expression, in the top-level environment specified by @var{module_or_state}. While @var{exp} is evaluated (using @code{primitive-eval}), @var{module_or_state} is made the current module when it is a module, or the current dynamic state when it is a dynamic state.Example: (eval '(+ 1 2) (interaction-environment)) @end deffn eval-options-interface @c snarfed from eval.c:3108 @deffn {Scheme Procedure} eval-options-interface [setting] Option interface for the evaluation options. Instead of using this procedure directly, use the procedures @code{eval-enable}, @code{eval-disable}, @code{eval-set!} and @code{eval-options}. @end deffn evaluator-traps-interface @c snarfed from eval.c:3129 @deffn {Scheme Procedure} evaluator-traps-interface [setting] Option interface for the evaluator trap options. @end deffn defined? @c snarfed from evalext.c:34 @deffn {Scheme Procedure} defined? sym [env] Return @code{#t} if @var{sym} is defined in the lexical environment @var{env}. When @var{env} is not specified, look in the top-level environment as defined by the current module. @end deffn map-in-order @c snarfed from evalext.c:80 @deffn {Scheme Procedure} map-in-order implemented by the C function "scm_map" @end deffn self-evaluating? @c snarfed from evalext.c:85 @deffn {Scheme Procedure} self-evaluating? obj Return #t for objects which Guile considers self-evaluating @end deffn load-extension @c snarfed from extensions.c:143 @deffn {Scheme Procedure} load-extension lib init Load and initialize the extension designated by LIB and INIT. When there is no pre-registered function for LIB/INIT, this is equivalent to @lisp (dynamic-call INIT (dynamic-link LIB)) @end lisp When there is a pre-registered function, that function is called instead. Normally, there is no pre-registered function. This option exists only for situations where dynamic linking is unavailable or unwanted. In that case, you would statically link your program with the desired library, and register its init function right after Guile has been initialized. LIB should be a string denoting a shared library without any file type suffix such as ".so". The suffix is provided automatically. It should also not contain any directory components. Libraries that implement Guile Extensions should be put into the normal locations for shared libraries. We recommend to use the naming convention libguile-bla-blum for a extension related to a module `(bla blum)'. The normal way for a extension to be used is to write a small Scheme file that defines a module, and to load the extension into this module. When the module is auto-loaded, the extension is loaded as well. For example, @lisp (define-module (bla blum)) (load-extension "libguile-bla-blum" "bla_init_blum") @end lisp @end deffn program-arguments @c snarfed from feature.c:57 @deffn {Scheme Procedure} program-arguments @deffnx {Scheme Procedure} command-line Return the list of command line arguments passed to Guile, as a list of strings. The list includes the invoked program name, which is usually @code{"guile"}, but excludes switches and parameters for command line options like @code{-e} and @code{-l}. @end deffn make-fluid @c snarfed from fluids.c:263 @deffn {Scheme Procedure} make-fluid Return a newly created fluid. Fluids are objects that can hold one value per dynamic state. That is, modifications to this value are only visible to code that executes with the same dynamic state as the modifying code. When a new dynamic state is constructed, it inherits the values from its parent. Because each thread normally executes with its own dynamic state, you can use fluids for thread local storage. @end deffn fluid? @c snarfed from fluids.c:286 @deffn {Scheme Procedure} fluid? obj Return @code{#t} iff @var{obj} is a fluid; otherwise, return @code{#f}. @end deffn fluid-ref @c snarfed from fluids.c:309 @deffn {Scheme Procedure} fluid-ref fluid Return the value associated with @var{fluid} in the current dynamic root. If @var{fluid} has not been set, then return @code{#f}. @end deffn fluid-set! @c snarfed from fluids.c:328 @deffn {Scheme Procedure} fluid-set! fluid value Set the value associated with @var{fluid} in the current dynamic root. @end deffn with-fluids* @c snarfed from fluids.c:398 @deffn {Scheme Procedure} with-fluids* fluids values thunk Set @var{fluids} to @var{values} temporary, and call @var{thunk}. @var{fluids} must be a list of fluids and @var{values} must be the same number of their values to be applied. Each substitution is done one after another. @var{thunk} must be a procedure with no argument. @end deffn with-fluid* @c snarfed from fluids.c:437 @deffn {Scheme Procedure} with-fluid* fluid value thunk Set @var{fluid} to @var{value} temporarily, and call @var{thunk}. @var{thunk} must be a procedure with no argument. @end deffn make-dynamic-state @c snarfed from fluids.c:490 @deffn {Scheme Procedure} make-dynamic-state [parent] Return a copy of the dynamic state object @var{parent} or of the current dynamic state when @var{parent} is omitted. @end deffn dynamic-state? @c snarfed from fluids.c:518 @deffn {Scheme Procedure} dynamic-state? obj Return @code{#t} if @var{obj} is a dynamic state object; return @code{#f} otherwise @end deffn current-dynamic-state @c snarfed from fluids.c:533 @deffn {Scheme Procedure} current-dynamic-state Return the current dynamic state object. @end deffn set-current-dynamic-state @c snarfed from fluids.c:543 @deffn {Scheme Procedure} set-current-dynamic-state state Set the current dynamic state object to @var{state} and return the previous current dynamic state object. @end deffn with-dynamic-state @c snarfed from fluids.c:585 @deffn {Scheme Procedure} with-dynamic-state state proc Call @var{proc} while @var{state} is the current dynamic state object. @end deffn setvbuf @c snarfed from fports.c:135 @deffn {Scheme Procedure} setvbuf port mode [size] Set the buffering mode for @var{port}. @var{mode} can be: @table @code @item _IONBF non-buffered @item _IOLBF line buffered @item _IOFBF block buffered, using a newly allocated buffer of @var{size} bytes. If @var{size} is omitted, a default size will be used. @end table @end deffn file-port? @c snarfed from fports.c:228 @deffn {Scheme Procedure} file-port? obj Determine whether @var{obj} is a port that is related to a file. @end deffn open-file @c snarfed from fports.c:284 @deffn {Scheme Procedure} open-file filename mode Open the file whose name is @var{filename}, and return a port representing that file. The attributes of the port are determined by the @var{mode} string. The way in which this is interpreted is similar to C stdio. The first character must be one of the following: @table @samp @item r Open an existing file for input. @item w Open a file for output, creating it if it doesn't already exist or removing its contents if it does. @item a Open a file for output, creating it if it doesn't already exist. All writes to the port will go to the end of the file. The "append mode" can be turned off while the port is in use @pxref{Ports and File Descriptors, fcntl} @end table The following additional characters can be appended: @table @samp @item b Open the underlying file in binary mode, if supported by the operating system. @item + Open the port for both input and output. E.g., @code{r+}: open an existing file for both input and output. @item 0 Create an "unbuffered" port. In this case input and output operations are passed directly to the underlying port implementation without additional buffering. This is likely to slow down I/O operations. The buffering mode can be changed while a port is in use @pxref{Ports and File Descriptors, setvbuf} @item l Add line-buffering to the port. The port output buffer will be automatically flushed whenever a newline character is written. @end table In theory we could create read/write ports which were buffered in one direction only. However this isn't included in the current interfaces. If a file cannot be opened with the access requested, @code{open-file} throws an exception. @end deffn gc-live-object-stats @c snarfed from gc.c:282 @deffn {Scheme Procedure} gc-live-object-stats Return an alist of statistics of the current live objects. @end deffn gc-stats @c snarfed from gc.c:301 @deffn {Scheme Procedure} gc-stats Return an association list of statistics about Guile's current use of storage. @end deffn object-address @c snarfed from gc.c:438 @deffn {Scheme Procedure} object-address obj Return an integer that for the lifetime of @var{obj} is uniquely returned by this function for @var{obj} @end deffn gc @c snarfed from gc.c:449 @deffn {Scheme Procedure} gc Scans all of SCM objects and reclaims for further use those that are no longer accessible. @end deffn class-of @c snarfed from goops.c:166 @deffn {Scheme Procedure} class-of x Return the class of @var{x}. @end deffn %compute-slots @c snarfed from goops.c:407 @deffn {Scheme Procedure} %compute-slots class Return a list consisting of the names of all slots belonging to class @var{class}, i. e. the slots of @var{class} and of all of its superclasses. @end deffn get-keyword @c snarfed from goops.c:498 @deffn {Scheme Procedure} get-keyword key l default_value Determine an associated value for the keyword @var{key} from the list @var{l}. The list @var{l} has to consist of an even number of elements, where, starting with the first, every second element is a keyword, followed by its associated value. If @var{l} does not hold a value for @var{key}, the value @var{default_value} is returned. @end deffn %initialize-object @c snarfed from goops.c:521 @deffn {Scheme Procedure} %initialize-object obj initargs Initialize the object @var{obj} with the given arguments @var{initargs}. @end deffn %prep-layout! @c snarfed from goops.c:619 @deffn {Scheme Procedure} %prep-layout! class @end deffn %inherit-magic! @c snarfed from goops.c:718 @deffn {Scheme Procedure} %inherit-magic! class dsupers @end deffn instance? @c snarfed from goops.c:958 @deffn {Scheme Procedure} instance? obj Return @code{#t} if @var{obj} is an instance. @end deffn class-name @c snarfed from goops.c:973 @deffn {Scheme Procedure} class-name obj Return the class name of @var{obj}. @end deffn class-direct-supers @c snarfed from goops.c:983 @deffn {Scheme Procedure} class-direct-supers obj Return the direct superclasses of the class @var{obj}. @end deffn class-direct-slots @c snarfed from goops.c:993 @deffn {Scheme Procedure} class-direct-slots obj Return the direct slots of the class @var{obj}. @end deffn class-direct-subclasses @c snarfed from goops.c:1003 @deffn {Scheme Procedure} class-direct-subclasses obj Return the direct subclasses of the class @var{obj}. @end deffn class-direct-methods @c snarfed from goops.c:1013 @deffn {Scheme Procedure} class-direct-methods obj Return the direct methods of the class @var{obj} @end deffn class-precedence-list @c snarfed from goops.c:1023 @deffn {Scheme Procedure} class-precedence-list obj Return the class precedence list of the class @var{obj}. @end deffn class-slots @c snarfed from goops.c:1033 @deffn {Scheme Procedure} class-slots obj Return the slot list of the class @var{obj}. @end deffn class-environment @c snarfed from goops.c:1043 @deffn {Scheme Procedure} class-environment obj Return the environment of the class @var{obj}. @end deffn generic-function-name @c snarfed from goops.c:1054 @deffn {Scheme Procedure} generic-function-name obj Return the name of the generic function @var{obj}. @end deffn generic-function-methods @c snarfed from goops.c:1099 @deffn {Scheme Procedure} generic-function-methods obj Return the methods of the generic function @var{obj}. @end deffn method-generic-function @c snarfed from goops.c:1112 @deffn {Scheme Procedure} method-generic-function obj Return the generic function for the method @var{obj}. @end deffn method-specializers @c snarfed from goops.c:1122 @deffn {Scheme Procedure} method-specializers obj Return specializers of the method @var{obj}. @end deffn method-procedure @c snarfed from goops.c:1132 @deffn {Scheme Procedure} method-procedure obj Return the procedure of the method @var{obj}. @end deffn accessor-method-slot-definition @c snarfed from goops.c:1142 @deffn {Scheme Procedure} accessor-method-slot-definition obj Return the slot definition of the accessor @var{obj}. @end deffn %tag-body @c snarfed from goops.c:1152 @deffn {Scheme Procedure} %tag-body body Internal GOOPS magic---don't use this function! @end deffn make-unbound @c snarfed from goops.c:1167 @deffn {Scheme Procedure} make-unbound Return the unbound value. @end deffn unbound? @c snarfed from goops.c:1176 @deffn {Scheme Procedure} unbound? obj Return @code{#t} if @var{obj} is unbound. @end deffn assert-bound @c snarfed from goops.c:1186 @deffn {Scheme Procedure} assert-bound value obj Return @var{value} if it is bound, and invoke the @var{slot-unbound} method of @var{obj} if it is not. @end deffn @@assert-bound-ref @c snarfed from goops.c:1198 @deffn {Scheme Procedure} @@assert-bound-ref obj index Like @code{assert-bound}, but use @var{index} for accessing the value from @var{obj}. @end deffn %fast-slot-ref @c snarfed from goops.c:1210 @deffn {Scheme Procedure} %fast-slot-ref obj index Return the slot value with index @var{index} from @var{obj}. @end deffn %fast-slot-set! @c snarfed from goops.c:1224 @deffn {Scheme Procedure} %fast-slot-set! obj index value Set the slot with index @var{index} in @var{obj} to @var{value}. @end deffn slot-ref-using-class @c snarfed from goops.c:1361 @deffn {Scheme Procedure} slot-ref-using-class class obj slot_name @end deffn slot-set-using-class! @c snarfed from goops.c:1380 @deffn {Scheme Procedure} slot-set-using-class! class obj slot_name value @end deffn slot-bound-using-class? @c snarfed from goops.c:1394 @deffn {Scheme Procedure} slot-bound-using-class? class obj slot_name @end deffn slot-exists-using-class? @c snarfed from goops.c:1409 @deffn {Scheme Procedure} slot-exists-using-class? class obj slot_name @end deffn slot-ref @c snarfed from goops.c:1425 @deffn {Scheme Procedure} slot-ref obj slot_name Return the value from @var{obj}'s slot with the name @var{slot_name}. @end deffn slot-set! @c snarfed from goops.c:1442 @deffn {Scheme Procedure} slot-set! obj slot_name value Set the slot named @var{slot_name} of @var{obj} to @var{value}. @end deffn slot-bound? @c snarfed from goops.c:1459 @deffn {Scheme Procedure} slot-bound? obj slot_name Return @code{#t} if the slot named @var{slot_name} of @var{obj} is bound. @end deffn slot-exists? @c snarfed from goops.c:1477 @deffn {Scheme Procedure} slot-exists? obj slot_name Return @code{#t} if @var{obj} has a slot named @var{slot_name}. @end deffn %allocate-instance @c snarfed from goops.c:1516 @deffn {Scheme Procedure} %allocate-instance class initargs Create a new instance of class @var{class} and initialize it from the arguments @var{initargs}. @end deffn %set-object-setter! @c snarfed from goops.c:1586 @deffn {Scheme Procedure} %set-object-setter! obj setter @end deffn %modify-instance @c snarfed from goops.c:1611 @deffn {Scheme Procedure} %modify-instance old new @end deffn %modify-class @c snarfed from goops.c:1637 @deffn {Scheme Procedure} %modify-class old new @end deffn %invalidate-class @c snarfed from goops.c:1661 @deffn {Scheme Procedure} %invalidate-class class @end deffn %invalidate-method-cache! @c snarfed from goops.c:1783 @deffn {Scheme Procedure} %invalidate-method-cache! gf @end deffn generic-capability? @c snarfed from goops.c:1809 @deffn {Scheme Procedure} generic-capability? proc @end deffn enable-primitive-generic! @c snarfed from goops.c:1822 @deffn {Scheme Procedure} enable-primitive-generic! . subrs @end deffn primitive-generic-generic @c snarfed from goops.c:1843 @deffn {Scheme Procedure} primitive-generic-generic subr @end deffn make @c snarfed from goops.c:2209 @deffn {Scheme Procedure} make . args Make a new object. @var{args} must contain the class and all necessary initialization information. @end deffn find-method @c snarfed from goops.c:2298 @deffn {Scheme Procedure} find-method . l @end deffn %method-more-specific? @c snarfed from goops.c:2318 @deffn {Scheme Procedure} %method-more-specific? m1 m2 targs @end deffn %goops-loaded @c snarfed from goops.c:2944 @deffn {Scheme Procedure} %goops-loaded Announce that GOOPS is loaded and perform initialization on the C level which depends on the loaded GOOPS modules. @end deffn make-guardian @c snarfed from guardians.c:313 @deffn {Scheme Procedure} make-guardian Create a new guardian. A guardian protects a set of objects from garbage collection, allowing a program to apply cleanup or other actions. @code{make-guardian} returns a procedure representing the guardian. Calling the guardian procedure with an argument adds the argument to the guardian's set of protected objects. Calling the guardian procedure without an argument returns one of the protected objects which are ready for garbage collection, or @code{#f} if no such object is available. Objects which are returned in this way are removed from the guardian. You can put a single object into a guardian more than once and you can put a single object into more than one guardian. The object will then be returned multiple times by the guardian procedures. An object is eligible to be returned from a guardian when it is no longer referenced from outside any guardian. There is no guarantee about the order in which objects are returned from a guardian. If you want to impose an order on finalization actions, for example, you can do that by keeping objects alive in some global data structure until they are no longer needed for finalizing other objects. Being an element in a weak vector, a key in a hash table with weak keys, or a value in a hash table with weak value does not prevent an object from being returned by a guardian. But as long as an object can be returned from a guardian it will not be removed from such a weak vector or hash table. In other words, a weak link does not prevent an object from being considered collectable, but being inside a guardian prevents a weak link from being broken. A key in a weak key hash table can be though of as having a strong reference to its associated value as long as the key is accessible. Consequently, when the key only accessible from within a guardian, the reference from the key to the value is also considered to be coming from within a guardian. Thus, if there is no other reference to the value, it is eligible to be returned from a guardian. @end deffn hashq @c snarfed from hash.c:184 @deffn {Scheme Procedure} hashq key size Determine a hash value for @var{key} that is suitable for lookups in a hashtable of size @var{size}, where @code{eq?} is used as the equality predicate. The function returns an integer in the range 0 to @var{size} - 1. Note that @code{hashq} may use internal addresses. Thus two calls to hashq where the keys are @code{eq?} are not guaranteed to deliver the same value if the key object gets garbage collected in between. This can happen, for example with symbols: @code{(hashq 'foo n) (gc) (hashq 'foo n)} may produce two different values, since @code{foo} will be garbage collected. @end deffn hashv @c snarfed from hash.c:220 @deffn {Scheme Procedure} hashv key size Determine a hash value for @var{key} that is suitable for lookups in a hashtable of size @var{size}, where @code{eqv?} is used as the equality predicate. The function returns an integer in the range 0 to @var{size} - 1. Note that @code{(hashv key)} may use internal addresses. Thus two calls to hashv where the keys are @code{eqv?} are not guaranteed to deliver the same value if the key object gets garbage collected in between. This can happen, for example with symbols: @code{(hashv 'foo n) (gc) (hashv 'foo n)} may produce two different values, since @code{foo} will be garbage collected. @end deffn hash @c snarfed from hash.c:243 @deffn {Scheme Procedure} hash key size Determine a hash value for @var{key} that is suitable for lookups in a hashtable of size @var{size}, where @code{equal?} is used as the equality predicate. The function returns an integer in the range 0 to @var{size} - 1. @end deffn make-hash-table @c snarfed from hashtab.c:302 @deffn {Scheme Procedure} make-hash-table [n] Make a new abstract hash table object with minimum number of buckets @var{n} @end deffn make-weak-key-hash-table @c snarfed from hashtab.c:319 @deffn {Scheme Procedure} make-weak-key-hash-table [n] @deffnx {Scheme Procedure} make-weak-value-hash-table size @deffnx {Scheme Procedure} make-doubly-weak-hash-table size Return a weak hash table with @var{size} buckets. You can modify weak hash tables in exactly the same way you would modify regular hash tables. (@pxref{Hash Tables}) @end deffn make-weak-value-hash-table @c snarfed from hashtab.c:334 @deffn {Scheme Procedure} make-weak-value-hash-table [n] Return a hash table with weak values with @var{size} buckets. (@pxref{Hash Tables}) @end deffn make-doubly-weak-hash-table @c snarfed from hashtab.c:351 @deffn {Scheme Procedure} make-doubly-weak-hash-table n Return a hash table with weak keys and values with @var{size} buckets. (@pxref{Hash Tables}) @end deffn hash-table? @c snarfed from hashtab.c:370 @deffn {Scheme Procedure} hash-table? obj Return @code{#t} if @var{obj} is an abstract hash table object. @end deffn weak-key-hash-table? @c snarfed from hashtab.c:384 @deffn {Scheme Procedure} weak-key-hash-table? obj @deffnx {Scheme Procedure} weak-value-hash-table? obj @deffnx {Scheme Procedure} doubly-weak-hash-table? obj Return @code{#t} if @var{obj} is the specified weak hash table. Note that a doubly weak hash table is neither a weak key nor a weak value hash table. @end deffn weak-value-hash-table? @c snarfed from hashtab.c:394 @deffn {Scheme Procedure} weak-value-hash-table? obj Return @code{#t} if @var{obj} is a weak value hash table. @end deffn doubly-weak-hash-table? @c snarfed from hashtab.c:404 @deffn {Scheme Procedure} doubly-weak-hash-table? obj Return @code{#t} if @var{obj} is a doubly weak hash table. @end deffn hash-clear! @c snarfed from hashtab.c:562 @deffn {Scheme Procedure} hash-clear! table Remove all items from @var{table} (without triggering a resize). @end deffn hashq-get-handle @c snarfed from hashtab.c:583 @deffn {Scheme Procedure} hashq-get-handle table key This procedure returns the @code{(key . value)} pair from the hash table @var{table}. If @var{table} does not hold an associated value for @var{key}, @code{#f} is returned. Uses @code{eq?} for equality testing. @end deffn hashq-create-handle! @c snarfed from hashtab.c:595 @deffn {Scheme Procedure} hashq-create-handle! table key init This function looks up @var{key} in @var{table} and returns its handle. If @var{key} is not already present, a new handle is created which associates @var{key} with @var{init}. @end deffn hashq-ref @c snarfed from hashtab.c:608 @deffn {Scheme Procedure} hashq-ref table key [dflt] Look up @var{key} in the hash table @var{table}, and return the value (if any) associated with it. If @var{key} is not found, return @var{default} (or @code{#f} if no @var{default} argument is supplied). Uses @code{eq?} for equality testing. @end deffn hashq-set! @c snarfed from hashtab.c:622 @deffn {Scheme Procedure} hashq-set! table key val Find the entry in @var{table} associated with @var{key}, and store @var{value} there. Uses @code{eq?} for equality testing. @end deffn hashq-remove! @c snarfed from hashtab.c:634 @deffn {Scheme Procedure} hashq-remove! table key Remove @var{key} (and any value associated with it) from @var{table}. Uses @code{eq?} for equality tests. @end deffn hashv-get-handle @c snarfed from hashtab.c:649 @deffn {Scheme Procedure} hashv-get-handle table key This procedure returns the @code{(key . value)} pair from the hash table @var{table}. If @var{table} does not hold an associated value for @var{key}, @code{#f} is returned. Uses @code{eqv?} for equality testing. @end deffn hashv-create-handle! @c snarfed from hashtab.c:661 @deffn {Scheme Procedure} hashv-create-handle! table key init This function looks up @var{key} in @var{table} and returns its handle. If @var{key} is not already present, a new handle is created which associates @var{key} with @var{init}. @end deffn hashv-ref @c snarfed from hashtab.c:675 @deffn {Scheme Procedure} hashv-ref table key [dflt] Look up @var{key} in the hash table @var{table}, and return the value (if any) associated with it. If @var{key} is not found, return @var{default} (or @code{#f} if no @var{default} argument is supplied). Uses @code{eqv?} for equality testing. @end deffn hashv-set! @c snarfed from hashtab.c:689 @deffn {Scheme Procedure} hashv-set! table key val Find the entry in @var{table} associated with @var{key}, and store @var{value} there. Uses @code{eqv?} for equality testing. @end deffn hashv-remove! @c snarfed from hashtab.c:700 @deffn {Scheme Procedure} hashv-remove! table key Remove @var{key} (and any value associated with it) from @var{table}. Uses @code{eqv?} for equality tests. @end deffn hash-get-handle @c snarfed from hashtab.c:714 @deffn {Scheme Procedure} hash-get-handle table key This procedure returns the @code{(key . value)} pair from the hash table @var{table}. If @var{table} does not hold an associated value for @var{key}, @code{#f} is returned. Uses @code{equal?} for equality testing. @end deffn hash-create-handle! @c snarfed from hashtab.c:726 @deffn {Scheme Procedure} hash-create-handle! table key init This function looks up @var{key} in @var{table} and returns its handle. If @var{key} is not already present, a new handle is created which associates @var{key} with @var{init}. @end deffn hash-ref @c snarfed from hashtab.c:739 @deffn {Scheme Procedure} hash-ref table key [dflt] Look up @var{key} in the hash table @var{table}, and return the value (if any) associated with it. If @var{key} is not found, return @var{default} (or @code{#f} if no @var{default} argument is supplied). Uses @code{equal?} for equality testing. @end deffn hash-set! @c snarfed from hashtab.c:754 @deffn {Scheme Procedure} hash-set! table key val Find the entry in @var{table} associated with @var{key}, and store @var{value} there. Uses @code{equal?} for equality testing. @end deffn hash-remove! @c snarfed from hashtab.c:766 @deffn {Scheme Procedure} hash-remove! table key Remove @var{key} (and any value associated with it) from @var{table}. Uses @code{equal?} for equality tests. @end deffn hashx-get-handle @c snarfed from hashtab.c:807 @deffn {Scheme Procedure} hashx-get-handle hash assoc table key This behaves the same way as the corresponding @code{-get-handle} function, but uses @var{hash} as a hash function and @var{assoc} to compare keys. @code{hash} must be a function that takes two arguments, a key to be hashed and a table size. @code{assoc} must be an associator function, like @code{assoc}, @code{assq} or @code{assv}. @end deffn hashx-create-handle! @c snarfed from hashtab.c:826 @deffn {Scheme Procedure} hashx-create-handle! hash assoc table key init This behaves the same way as the corresponding @code{-create-handle} function, but uses @var{hash} as a hash function and @var{assoc} to compare keys. @code{hash} must be a function that takes two arguments, a key to be hashed and a table size. @code{assoc} must be an associator function, like @code{assoc}, @code{assq} or @code{assv}. @end deffn hashx-ref @c snarfed from hashtab.c:849 @deffn {Scheme Procedure} hashx-ref hash assoc table key [dflt] This behaves the same way as the corresponding @code{ref} function, but uses @var{hash} as a hash function and @var{assoc} to compare keys. @code{hash} must be a function that takes two arguments, a key to be hashed and a table size. @code{assoc} must be an associator function, like @code{assoc}, @code{assq} or @code{assv}. By way of illustration, @code{hashq-ref table key} is equivalent to @code{hashx-ref hashq assq table key}. @end deffn hashx-set! @c snarfed from hashtab.c:875 @deffn {Scheme Procedure} hashx-set! hash assoc table key val This behaves the same way as the corresponding @code{set!} function, but uses @var{hash} as a hash function and @var{assoc} to compare keys. @code{hash} must be a function that takes two arguments, a key to be hashed and a table size. @code{assoc} must be an associator function, like @code{assoc}, @code{assq} or @code{assv}. By way of illustration, @code{hashq-set! table key} is equivalent to @code{hashx-set! hashq assq table key}. @end deffn hashx-remove! @c snarfed from hashtab.c:896 @deffn {Scheme Procedure} hashx-remove! hash assoc table obj This behaves the same way as the corresponding @code{remove!} function, but uses @var{hash} as a hash function and @var{assoc} to compare keys. @code{hash} must be a function that takes two arguments, a key to be hashed and a table size. @code{assoc} must be an associator function, like @code{assoc}, @code{assq} or @code{assv}. By way of illustration, @code{hashq-remove! table key} is equivalent to @code{hashx-remove! hashq assq #f table key}. @end deffn hash-fold @c snarfed from hashtab.c:986 @deffn {Scheme Procedure} hash-fold proc init table An iterator over hash-table elements. Accumulates and returns a result by applying PROC successively. The arguments to PROC are "(key value prior-result)" where key and value are successive pairs from the hash table TABLE, and prior-result is either INIT (for the first application of PROC) or the return value of the previous application of PROC. For example, @code{(hash-fold acons '() tab)} will convert a hash table into an a-list of key-value pairs. @end deffn hash-for-each @c snarfed from hashtab.c:1007 @deffn {Scheme Procedure} hash-for-each proc table An iterator over hash-table elements. Applies PROC successively on all hash table items. The arguments to PROC are "(key value)" where key and value are successive pairs from the hash table TABLE. @end deffn hash-for-each-handle @c snarfed from hashtab.c:1024 @deffn {Scheme Procedure} hash-for-each-handle proc table An iterator over hash-table elements. Applies PROC successively on all hash table handles. @end deffn hash-map->list @c snarfed from hashtab.c:1050 @deffn {Scheme Procedure} hash-map->list proc table An iterator over hash-table elements. Accumulates and returns as a list the results of applying PROC successively. The arguments to PROC are "(key value)" where key and value are successive pairs from the hash table TABLE. @end deffn make-hook @c snarfed from hooks.c:154 @deffn {Scheme Procedure} make-hook [n_args] Create a hook for storing procedure of arity @var{n_args}. @var{n_args} defaults to zero. The returned value is a hook object to be used with the other hook procedures. @end deffn hook? @c snarfed from hooks.c:171 @deffn {Scheme Procedure} hook? x Return @code{#t} if @var{x} is a hook, @code{#f} otherwise. @end deffn hook-empty? @c snarfed from hooks.c:182 @deffn {Scheme Procedure} hook-empty? hook Return @code{#t} if @var{hook} is an empty hook, @code{#f} otherwise. @end deffn add-hook! @c snarfed from hooks.c:196 @deffn {Scheme Procedure} add-hook! hook proc [append_p] Add the procedure @var{proc} to the hook @var{hook}. The procedure is added to the end if @var{append_p} is true, otherwise it is added to the front. The return value of this procedure is not specified. @end deffn remove-hook! @c snarfed from hooks.c:223 @deffn {Scheme Procedure} remove-hook! hook proc Remove the procedure @var{proc} from the hook @var{hook}. The return value of this procedure is not specified. @end deffn reset-hook! @c snarfed from hooks.c:237 @deffn {Scheme Procedure} reset-hook! hook Remove all procedures from the hook @var{hook}. The return value of this procedure is not specified. @end deffn run-hook @c snarfed from hooks.c:251 @deffn {Scheme Procedure} run-hook hook . args Apply all procedures from the hook @var{hook} to the arguments @var{args}. The order of the procedure application is first to last. The return value of this procedure is not specified. @end deffn hook->list @c snarfed from hooks.c:278 @deffn {Scheme Procedure} hook->list hook Convert the procedure list of @var{hook} to a list. @end deffn gettext @c snarfed from i18n.c:90 @deffn {Scheme Procedure} gettext msgid [domain [category]] Return the translation of @var{msgid} in the message domain @var{domain}. @var{domain} is optional and defaults to the domain set through (textdomain). @var{category} is optional and defaults to LC_MESSAGES. @end deffn ngettext @c snarfed from i18n.c:146 @deffn {Scheme Procedure} ngettext msgid msgid_plural n [domain [category]] Return the translation of @var{msgid}/@var{msgid_plural} in the message domain @var{domain}, with the plural form being chosen appropriately for the number @var{n}. @var{domain} is optional and defaults to the domain set through (textdomain). @var{category} is optional and defaults to LC_MESSAGES. @end deffn textdomain @c snarfed from i18n.c:209 @deffn {Scheme Procedure} textdomain [domainname] If optional parameter @var{domainname} is supplied, set the textdomain. Return the textdomain. @end deffn bindtextdomain @c snarfed from i18n.c:241 @deffn {Scheme Procedure} bindtextdomain domainname [directory] If optional parameter @var{directory} is supplied, set message catalogs to directory @var{directory}. Return the directory bound to @var{domainname}. @end deffn bind-textdomain-codeset @c snarfed from i18n.c:280 @deffn {Scheme Procedure} bind-textdomain-codeset domainname [encoding] If optional parameter @var{encoding} is supplied, set encoding for message catalogs of @var{domainname}. Return the encoding of @var{domainname}. @end deffn ftell @c snarfed from ioext.c:54 @deffn {Scheme Procedure} ftell fd_port Return an integer representing the current position of @var{fd/port}, measured from the beginning. Equivalent to: @lisp (seek port 0 SEEK_CUR) @end lisp @end deffn redirect-port @c snarfed from ioext.c:72 @deffn {Scheme Procedure} redirect-port old new This procedure takes two ports and duplicates the underlying file descriptor from @var{old-port} into @var{new-port}. The current file descriptor in @var{new-port} will be closed. After the redirection the two ports will share a file position and file status flags. The return value is unspecified. Unexpected behaviour can result if both ports are subsequently used and the original and/or duplicate ports are buffered. This procedure does not have any side effects on other ports or revealed counts. @end deffn dup->fdes @c snarfed from ioext.c:111 @deffn {Scheme Procedure} dup->fdes fd_or_port [fd] Return a new integer file descriptor referring to the open file designated by @var{fd_or_port}, which must be either an open file port or a file descriptor. @end deffn dup2 @c snarfed from ioext.c:158 @deffn {Scheme Procedure} dup2 oldfd newfd A simple wrapper for the @code{dup2} system call. Copies the file descriptor @var{oldfd} to descriptor number @var{newfd}, replacing the previous meaning of @var{newfd}. Both @var{oldfd} and @var{newfd} must be integers. Unlike for dup->fdes or primitive-move->fdes, no attempt is made to move away ports which are using @var{newfd}. The return value is unspecified. @end deffn fileno @c snarfed from ioext.c:177 @deffn {Scheme Procedure} fileno port Return the integer file descriptor underlying @var{port}. Does not change its revealed count. @end deffn isatty? @c snarfed from ioext.c:197 @deffn {Scheme Procedure} isatty? port Return @code{#t} if @var{port} is using a serial non--file device, otherwise @code{#f}. @end deffn fdopen @c snarfed from ioext.c:219 @deffn {Scheme Procedure} fdopen fdes modes Return a new port based on the file descriptor @var{fdes}. Modes are given by the string @var{modes}. The revealed count of the port is initialized to zero. The modes string is the same as that accepted by @ref{File Ports, open-file}. @end deffn primitive-move->fdes @c snarfed from ioext.c:241 @deffn {Scheme Procedure} primitive-move->fdes port fd Moves the underlying file descriptor for @var{port} to the integer value @var{fdes} without changing the revealed count of @var{port}. Any other ports already using this descriptor will be automatically shifted to new descriptors and their revealed counts reset to zero. The return value is @code{#f} if the file descriptor already had the required value or @code{#t} if it was moved. @end deffn fdes->ports @c snarfed from ioext.c:274 @deffn {Scheme Procedure} fdes->ports fd Return a list of existing ports which have @var{fdes} as an underlying file descriptor, without changing their revealed counts. @end deffn keyword? @c snarfed from keywords.c:52 @deffn {Scheme Procedure} keyword? obj Return @code{#t} if the argument @var{obj} is a keyword, else @code{#f}. @end deffn symbol->keyword @c snarfed from keywords.c:61 @deffn {Scheme Procedure} symbol->keyword symbol Return the keyword with the same name as @var{symbol}. @end deffn keyword->symbol @c snarfed from keywords.c:83 @deffn {Scheme Procedure} keyword->symbol keyword Return the symbol with the same name as @var{keyword}. @end deffn make-list @c snarfed from list.c:105 @deffn {Scheme Procedure} make-list n [init] Create a list containing of @var{n} elements, where each element is initialized to @var{init}. @var{init} defaults to the empty list @code{()} if not given. @end deffn cons* @c snarfed from list.c:129 @deffn {Scheme Procedure} cons* arg . rest Like @code{list}, but the last arg provides the tail of the constructed list, returning @code{(cons @var{arg1} (cons @var{arg2} (cons @dots{} @var{argn})))}. Requires at least one argument. If given one argument, that argument is returned as result. This function is called @code{list*} in some other Schemes and in Common LISP. @end deffn null? @c snarfed from list.c:155 @deffn {Scheme Procedure} null? x Return @code{#t} iff @var{x} is the empty list, else @code{#f}. @end deffn list? @c snarfed from list.c:165 @deffn {Scheme Procedure} list? x Return @code{#t} iff @var{x} is a proper list, else @code{#f}. @end deffn length @c snarfed from list.c:206 @deffn {Scheme Procedure} length lst Return the number of elements in list @var{lst}. @end deffn append @c snarfed from list.c:235 @deffn {Scheme Procedure} append . args Return a list consisting of the elements the lists passed as arguments. @lisp (append '(x) '(y)) @result{} (x y) (append '(a) '(b c d)) @result{} (a b c d) (append '(a (b)) '((c))) @result{} (a (b) (c)) @end lisp The resulting list is always newly allocated, except that it shares structure with the last list argument. The last argument may actually be any object; an improper list results if the last argument is not a proper list. @lisp (append '(a b) '(c . d)) @result{} (a b c . d) (append '() 'a) @result{} a @end lisp @end deffn append! @c snarfed from list.c:271 @deffn {Scheme Procedure} append! . lists A destructive version of @code{append} (@pxref{Pairs and Lists,,,r5rs, The Revised^5 Report on Scheme}). The cdr field of each list's final pair is changed to point to the head of the next list, so no consing is performed. Return the mutated list. @end deffn last-pair @c snarfed from list.c:303 @deffn {Scheme Procedure} last-pair lst Return the last pair in @var{lst}, signalling an error if @var{lst} is circular. @end deffn reverse @c snarfed from list.c:333 @deffn {Scheme Procedure} reverse lst Return a new list that contains the elements of @var{lst} but in reverse order. @end deffn reverse! @c snarfed from list.c:367 @deffn {Scheme Procedure} reverse! lst [new_tail] A destructive version of @code{reverse} (@pxref{Pairs and Lists,,,r5rs, The Revised^5 Report on Scheme}). The cdr of each cell in @var{lst} is modified to point to the previous list element. Return the reversed list. Caveat: because the list is modified in place, the tail of the original list now becomes its head, and the head of the original list now becomes the tail. Therefore, the @var{lst} symbol to which the head of the original list was bound now points to the tail. To ensure that the head of the modified list is not lost, it is wise to save the return value of @code{reverse!} @end deffn list-ref @c snarfed from list.c:393 @deffn {Scheme Procedure} list-ref list k Return the @var{k}th element from @var{list}. @end deffn list-set! @c snarfed from list.c:417 @deffn {Scheme Procedure} list-set! list k val Set the @var{k}th element of @var{list} to @var{val}. @end deffn list-cdr-ref @c snarfed from list.c:439 @deffn {Scheme Procedure} list-cdr-ref implemented by the C function "scm_list_tail" @end deffn list-tail @c snarfed from list.c:448 @deffn {Scheme Procedure} list-tail lst k @deffnx {Scheme Procedure} list-cdr-ref lst k Return the "tail" of @var{lst} beginning with its @var{k}th element. The first element of the list is considered to be element 0. @code{list-tail} and @code{list-cdr-ref} are identical. It may help to think of @code{list-cdr-ref} as accessing the @var{k}th cdr of the list, or returning the results of cdring @var{k} times down @var{lst}. @end deffn list-cdr-set! @c snarfed from list.c:463 @deffn {Scheme Procedure} list-cdr-set! list k val Set the @var{k}th cdr of @var{list} to @var{val}. @end deffn list-head @c snarfed from list.c:491 @deffn {Scheme Procedure} list-head lst k Copy the first @var{k} elements from @var{lst} into a new list, and return it. @end deffn list-copy @c snarfed from list.c:542 @deffn {Scheme Procedure} list-copy lst Return a (newly-created) copy of @var{lst}. @end deffn list @c snarfed from list.c:571 @deffn {Scheme Procedure} list . objs Return a list containing @var{objs}, the arguments to @code{list}. @end deffn memq @c snarfed from list.c:613 @deffn {Scheme Procedure} memq x lst Return the first sublist of @var{lst} whose car is @code{eq?} to @var{x} where the sublists of @var{lst} are the non-empty lists returned by @code{(list-tail @var{lst} @var{k})} for @var{k} less than the length of @var{lst}. If @var{x} does not occur in @var{lst}, then @code{#f} (not the empty list) is returned. @end deffn memv @c snarfed from list.c:629 @deffn {Scheme Procedure} memv x lst Return the first sublist of @var{lst} whose car is @code{eqv?} to @var{x} where the sublists of @var{lst} are the non-empty lists returned by @code{(list-tail @var{lst} @var{k})} for @var{k} less than the length of @var{lst}. If @var{x} does not occur in @var{lst}, then @code{#f} (not the empty list) is returned. @end deffn member @c snarfed from list.c:650 @deffn {Scheme Procedure} member x lst Return the first sublist of @var{lst} whose car is @code{equal?} to @var{x} where the sublists of @var{lst} are the non-empty lists returned by @code{(list-tail @var{lst} @var{k})} for @var{k} less than the length of @var{lst}. If @var{x} does not occur in @var{lst}, then @code{#f} (not the empty list) is returned. @end deffn delq! @c snarfed from list.c:675 @deffn {Scheme Procedure} delq! item lst @deffnx {Scheme Procedure} delv! item lst @deffnx {Scheme Procedure} delete! item lst These procedures are destructive versions of @code{delq}, @code{delv} and @code{delete}: they modify the existing @var{lst} rather than creating a new list. Caveat evaluator: Like other destructive list functions, these functions cannot modify the binding of @var{lst}, and so cannot be used to delete the first element of @var{lst} destructively. @end deffn delv! @c snarfed from list.c:699 @deffn {Scheme Procedure} delv! item lst Destructively remove all elements from @var{lst} that are @code{eqv?} to @var{item}. @end deffn delete! @c snarfed from list.c:724 @deffn {Scheme Procedure} delete! item lst Destructively remove all elements from @var{lst} that are @code{equal?} to @var{item}. @end deffn delq @c snarfed from list.c:753 @deffn {Scheme Procedure} delq item lst Return a newly-created copy of @var{lst} with elements @code{eq?} to @var{item} removed. This procedure mirrors @code{memq}: @code{delq} compares elements of @var{lst} against @var{item} with @code{eq?}. @end deffn delv @c snarfed from list.c:766 @deffn {Scheme Procedure} delv item lst Return a newly-created copy of @var{lst} with elements @code{eqv?} to @var{item} removed. This procedure mirrors @code{memv}: @code{delv} compares elements of @var{lst} against @var{item} with @code{eqv?}. @end deffn delete @c snarfed from list.c:779 @deffn {Scheme Procedure} delete item lst Return a newly-created copy of @var{lst} with elements @code{equal?} to @var{item} removed. This procedure mirrors @code{member}: @code{delete} compares elements of @var{lst} against @var{item} with @code{equal?}. @end deffn delq1! @c snarfed from list.c:792 @deffn {Scheme Procedure} delq1! item lst Like @code{delq!}, but only deletes the first occurrence of @var{item} from @var{lst}. Tests for equality using @code{eq?}. See also @code{delv1!} and @code{delete1!}. @end deffn delv1! @c snarfed from list.c:820 @deffn {Scheme Procedure} delv1! item lst Like @code{delv!}, but only deletes the first occurrence of @var{item} from @var{lst}. Tests for equality using @code{eqv?}. See also @code{delq1!} and @code{delete1!}. @end deffn delete1! @c snarfed from list.c:848 @deffn {Scheme Procedure} delete1! item lst Like @code{delete!}, but only deletes the first occurrence of @var{item} from @var{lst}. Tests for equality using @code{equal?}. See also @code{delq1!} and @code{delv1!}. @end deffn filter @c snarfed from list.c:880 @deffn {Scheme Procedure} filter pred list Return all the elements of 2nd arg @var{list} that satisfy predicate @var{pred}. The list is not disordered -- elements that appear in the result list occur in the same order as they occur in the argument list. The returned list may share a common tail with the argument list. The dynamic order in which the various applications of pred are made is not specified. @lisp (filter even? '(0 7 8 8 43 -4)) => (0 8 8 -4) @end lisp @end deffn filter! @c snarfed from list.c:907 @deffn {Scheme Procedure} filter! pred list Linear-update variant of @code{filter}. @end deffn primitive-load @c snarfed from load.c:77 @deffn {Scheme Procedure} primitive-load filename Load the file named @var{filename} and evaluate its contents in the top-level environment. The load paths are not searched; @var{filename} must either be a full pathname or be a pathname relative to the current directory. If the variable @code{%load-hook} is defined, it should be bound to a procedure that will be called before any code is loaded. See the documentation for @code{%load-hook} later in this section. @end deffn %package-data-dir @c snarfed from load.c:132 @deffn {Scheme Procedure} %package-data-dir Return the name of the directory where Scheme packages, modules and libraries are kept. On most Unix systems, this will be @samp{/usr/local/share/guile}. @end deffn %library-dir @c snarfed from load.c:144 @deffn {Scheme Procedure} %library-dir Return the directory where the Guile Scheme library files are installed. E.g., may return "/usr/share/guile/1.3.5". @end deffn %site-dir @c snarfed from load.c:156 @deffn {Scheme Procedure} %site-dir Return the directory where the Guile site files are installed. E.g., may return "/usr/share/guile/site". @end deffn parse-path @c snarfed from load.c:181 @deffn {Scheme Procedure} parse-path path [tail] Parse @var{path}, which is expected to be a colon-separated string, into a list and return the resulting list with @var{tail} appended. If @var{path} is @code{#f}, @var{tail} is returned. @end deffn search-path @c snarfed from load.c:308 @deffn {Scheme Procedure} search-path path filename [extensions] Search @var{path} for a directory containing a file named @var{filename}. The file must be readable, and not a directory. If we find one, return its full filename; otherwise, return @code{#f}. If @var{filename} is absolute, return it unchanged. If given, @var{extensions} is a list of strings; for each directory in @var{path}, we search for @var{filename} concatenated with each @var{extension}. @end deffn %search-load-path @c snarfed from load.c:445 @deffn {Scheme Procedure} %search-load-path filename Search @var{%load-path} for the file named @var{filename}, which must be readable by the current user. If @var{filename} is found in the list of paths to search or is an absolute pathname, return its full pathname. Otherwise, return @code{#f}. Filenames may have any of the optional extensions in the @code{%load-extensions} list; @code{%search-load-path} will try each extension automatically. @end deffn primitive-load-path @c snarfed from load.c:466 @deffn {Scheme Procedure} primitive-load-path filename Search @var{%load-path} for the file named @var{filename} and load it into the top-level environment. If @var{filename} is a relative pathname and is not found in the list of search paths, an error is signalled. @end deffn procedure->memoizing-macro @c snarfed from macros.c:109 @deffn {Scheme Procedure} procedure->memoizing-macro code Return a @dfn{macro} which, when a symbol defined to this value appears as the first symbol in an expression, evaluates the result of applying @var{code} to the expression and the environment. @code{procedure->memoizing-macro} is the same as @code{procedure->macro}, except that the expression returned by @var{code} replaces the original macro expression in the memoized form of the containing code. @end deffn procedure->syntax @c snarfed from macros.c:123 @deffn {Scheme Procedure} procedure->syntax code Return a @dfn{macro} which, when a symbol defined to this value appears as the first symbol in an expression, returns the result of applying @var{code} to the expression and the environment. @end deffn procedure->macro @c snarfed from macros.c:146 @deffn {Scheme Procedure} procedure->macro code Return a @dfn{macro} which, when a symbol defined to this value appears as the first symbol in an expression, evaluates the result of applying @var{code} to the expression and the environment. For example: @lisp (define trace (procedure->macro (lambda (x env) `(set! ,(cadr x) (tracef ,(cadr x) ',(cadr x)))))) (trace @i{foo}) @equiv{} (set! @i{foo} (tracef @i{foo} '@i{foo})). @end lisp @end deffn macro? @c snarfed from macros.c:165 @deffn {Scheme Procedure} macro? obj Return @code{#t} if @var{obj} is a regular macro, a memoizing macro or a syntax transformer. @end deffn macro-type @c snarfed from macros.c:186 @deffn {Scheme Procedure} macro-type m Return one of the symbols @code{syntax}, @code{macro} or @code{macro!}, depending on whether @var{m} is a syntax transformer, a regular macro, or a memoizing macro, respectively. If @var{m} is not a macro, @code{#f} is returned. @end deffn macro-name @c snarfed from macros.c:207 @deffn {Scheme Procedure} macro-name m Return the name of the macro @var{m}. @end deffn macro-transformer @c snarfed from macros.c:218 @deffn {Scheme Procedure} macro-transformer m Return the transformer of the macro @var{m}. @end deffn current-module @c snarfed from modules.c:45 @deffn {Scheme Procedure} current-module Return the current module. @end deffn set-current-module @c snarfed from modules.c:57 @deffn {Scheme Procedure} set-current-module module Set the current module to @var{module} and return the previous current module. @end deffn interaction-environment @c snarfed from modules.c:80 @deffn {Scheme Procedure} interaction-environment Return a specifier for the environment that contains implementation--defined bindings, typically a superset of those listed in the report. The intent is that this procedure will return the environment in which the implementation would evaluate expressions dynamically typed by the user. @end deffn env-module @c snarfed from modules.c:266 @deffn {Scheme Procedure} env-module env Return the module of @var{ENV}, a lexical environment. @end deffn standard-eval-closure @c snarfed from modules.c:342 @deffn {Scheme Procedure} standard-eval-closure module Return an eval closure for the module @var{module}. @end deffn standard-interface-eval-closure @c snarfed from modules.c:354 @deffn {Scheme Procedure} standard-interface-eval-closure module Return a interface eval closure for the module @var{module}. Such a closure does not allow new bindings to be added. @end deffn module-import-interface @c snarfed from modules.c:400 @deffn {Scheme Procedure} module-import-interface module sym @end deffn %get-pre-modules-obarray @c snarfed from modules.c:617 @deffn {Scheme Procedure} %get-pre-modules-obarray Return the obarray that is used for all new bindings before the module system is booted. The first call to @code{set-current-module} will boot the module system. @end deffn exact? @c snarfed from numbers.c:460 @deffn {Scheme Procedure} exact? x Return @code{#t} if @var{x} is an exact number, @code{#f} otherwise. @end deffn odd? @c snarfed from numbers.c:479 @deffn {Scheme Procedure} odd? n Return @code{#t} if @var{n} is an odd number, @code{#f} otherwise. @end deffn even? @c snarfed from numbers.c:514 @deffn {Scheme Procedure} even? n Return @code{#t} if @var{n} is an even number, @code{#f} otherwise. @end deffn inf? @c snarfed from numbers.c:548 @deffn {Scheme Procedure} inf? x Return @code{#t} if @var{x} is either @samp{+inf.0} or @samp{-inf.0}, @code{#f} otherwise. @end deffn nan? @c snarfed from numbers.c:564 @deffn {Scheme Procedure} nan? n Return @code{#t} if @var{n} is a NaN, @code{#f} otherwise. @end deffn inf @c snarfed from numbers.c:636 @deffn {Scheme Procedure} inf Return Inf. @end deffn nan @c snarfed from numbers.c:651 @deffn {Scheme Procedure} nan Return NaN. @end deffn abs @c snarfed from numbers.c:667 @deffn {Scheme Procedure} abs x Return the absolute value of @var{x}. @end deffn logand @c snarfed from numbers.c:1203 @deffn {Scheme Procedure} logand n1 n2 Return the bitwise AND of the integer arguments. @lisp (logand) @result{} -1 (logand 7) @result{} 7 (logand #b111 #b011 #b001) @result{} 1 @end lisp @end deffn logior @c snarfed from numbers.c:1279 @deffn {Scheme Procedure} logior n1 n2 Return the bitwise OR of the integer arguments. @lisp (logior) @result{} 0 (logior 7) @result{} 7 (logior #b000 #b001 #b011) @result{} 3 @end lisp @end deffn logxor @c snarfed from numbers.c:1355 @deffn {Scheme Procedure} logxor n1 n2 Return the bitwise XOR of the integer arguments. A bit is set in the result if it is set in an odd number of arguments. @lisp (logxor) @result{} 0 (logxor 7) @result{} 7 (logxor #b000 #b001 #b011) @result{} 2 (logxor #b000 #b001 #b011 #b011) @result{} 1 @end lisp @end deffn logtest @c snarfed from numbers.c:1430 @deffn {Scheme Procedure} logtest j k Test whether @var{j} and @var{k} have any 1 bits in common. This is equivalent to @code{(not (zero? (logand j k)))}, but without actually calculating the @code{logand}, just testing for non-zero. @lisp (logtest #b0100 #b1011) @result{} #f (logtest #b0100 #b0111) @result{} #t @end lisp @end deffn logbit? @c snarfed from numbers.c:1503 @deffn {Scheme Procedure} logbit? index j Test whether bit number @var{index} in @var{j} is set. @var{index} starts from 0 for the least significant bit. @lisp (logbit? 0 #b1101) @result{} #t (logbit? 1 #b1101) @result{} #f (logbit? 2 #b1101) @result{} #t (logbit? 3 #b1101) @result{} #t (logbit? 4 #b1101) @result{} #f @end lisp @end deffn lognot @c snarfed from numbers.c:1537 @deffn {Scheme Procedure} lognot n Return the integer which is the ones-complement of the integer argument. @lisp (number->string (lognot #b10000000) 2) @result{} "-10000001" (number->string (lognot #b0) 2) @result{} "-1" @end lisp @end deffn modulo-expt @c snarfed from numbers.c:1582 @deffn {Scheme Procedure} modulo-expt n k m Return @var{n} raised to the integer exponent @var{k}, modulo @var{m}. @lisp (modulo-expt 2 3 5) @result{} 3 @end lisp @end deffn integer-expt @c snarfed from numbers.c:1691 @deffn {Scheme Procedure} integer-expt n k Return @var{n} raised to the power @var{k}. @var{k} must be an exact integer, @var{n} can be any number. Negative @var{k} is supported, and results in @math{1/n^abs(k)} in the usual way. @math{@var{n}^0} is 1, as usual, and that includes @math{0^0} is 1. @lisp (integer-expt 2 5) @result{} 32 (integer-expt -3 3) @result{} -27 (integer-expt 5 -3) @result{} 1/125 (integer-expt 0 0) @result{} 1 @end lisp @end deffn ash @c snarfed from numbers.c:1781 @deffn {Scheme Procedure} ash n cnt Return @var{n} shifted left by @var{cnt} bits, or shifted right if @var{cnt} is negative. This is an ``arithmetic'' shift. This is effectively a multiplication by 2^@var{cnt}, and when @var{cnt} is negative it's a division, rounded towards negative infinity. (Note that this is not the same rounding as @code{quotient} does.) With @var{n} viewed as an infinite precision twos complement, @code{ash} means a left shift introducing zero bits, or a right shift dropping bits. @lisp (number->string (ash #b1 3) 2) @result{} "1000" (number->string (ash #b1010 -1) 2) @result{} "101" ;; -23 is bits ...11101001, -6 is bits ...111010 (ash -23 -2) @result{} -6 @end lisp @end deffn bit-extract @c snarfed from numbers.c:1872 @deffn {Scheme Procedure} bit-extract n start end Return the integer composed of the @var{start} (inclusive) through @var{end} (exclusive) bits of @var{n}. The @var{start}th bit becomes the 0-th bit in the result. @lisp (number->string (bit-extract #b1101101010 0 4) 2) @result{} "1010" (number->string (bit-extract #b1101101010 4 9) 2) @result{} "10110" @end lisp @end deffn logcount @c snarfed from numbers.c:1951 @deffn {Scheme Procedure} logcount n Return the number of bits in integer @var{n}. If integer is positive, the 1-bits in its binary representation are counted. If negative, the 0-bits in its two's-complement binary representation are counted. If 0, 0 is returned. @lisp (logcount #b10101010) @result{} 4 (logcount 0) @result{} 0 (logcount -2) @result{} 1 @end lisp @end deffn integer-length @c snarfed from numbers.c:1999 @deffn {Scheme Procedure} integer-length n Return the number of bits necessary to represent @var{n}. @lisp (integer-length #b10101010) @result{} 8 (integer-length 0) @result{} 0 (integer-length #b1111) @result{} 4 @end lisp @end deffn number->string @c snarfed from numbers.c:2339 @deffn {Scheme Procedure} number->string n [radix] Return a string holding the external representation of the number @var{n} in the given @var{radix}. If @var{n} is inexact, a radix of 10 will be used. @end deffn string->number @c snarfed from numbers.c:3037 @deffn {Scheme Procedure} string->number string [radix] Return a number of the maximally precise representation expressed by the given @var{string}. @var{radix} must be an exact integer, either 2, 8, 10, or 16. If supplied, @var{radix} is a default radix that may be overridden by an explicit radix prefix in @var{string} (e.g. "#o177"). If @var{radix} is not supplied, then the default radix is 10. If string is not a syntactically valid notation for a number, then @code{string->number} returns @code{#f}. @end deffn number? @c snarfed from numbers.c:3100 @deffn {Scheme Procedure} number? x Return @code{#t} if @var{x} is a number, @code{#f} otherwise. @end deffn complex? @c snarfed from numbers.c:3113 @deffn {Scheme Procedure} complex? x Return @code{#t} if @var{x} is a complex number, @code{#f} otherwise. Note that the sets of real, rational and integer values form subsets of the set of complex numbers, i. e. the predicate will also be fulfilled if @var{x} is a real, rational or integer number. @end deffn real? @c snarfed from numbers.c:3126 @deffn {Scheme Procedure} real? x Return @code{#t} if @var{x} is a real number, @code{#f} otherwise. Note that the set of integer values forms a subset of the set of real numbers, i. e. the predicate will also be fulfilled if @var{x} is an integer number. @end deffn rational? @c snarfed from numbers.c:3139 @deffn {Scheme Procedure} rational? x Return @code{#t} if @var{x} is a rational number, @code{#f} otherwise. Note that the set of integer values forms a subset of the set of rational numbers, i. e. the predicate will also be fulfilled if @var{x} is an integer number. @end deffn integer? @c snarfed from numbers.c:3162 @deffn {Scheme Procedure} integer? x Return @code{#t} if @var{x} is an integer number, @code{#f} else. @end deffn inexact? @c snarfed from numbers.c:3188 @deffn {Scheme Procedure} inexact? x Return @code{#t} if @var{x} is an inexact number, @code{#f} else. @end deffn 1+ @c snarfed from numbers.c:4115 @deffn {Scheme Procedure} 1+ x Return @math{@var{x}+1}. @end deffn 1- @c snarfed from numbers.c:4360 @deffn {Scheme Procedure} 1- x Return @math{@var{x}-1}. @end deffn truncate @c snarfed from numbers.c:5088 @deffn {Scheme Procedure} truncate x Round the number @var{x} towards zero. @end deffn round @c snarfed from numbers.c:5104 @deffn {Scheme Procedure} round x Round the number @var{x} towards the nearest integer. When it is exactly halfway between two integers, round towards the even one. @end deffn floor @c snarfed from numbers.c:5130 @deffn {Scheme Procedure} floor x Round the number @var{x} towards minus infinity. @end deffn ceiling @c snarfed from numbers.c:5161 @deffn {Scheme Procedure} ceiling x Round the number @var{x} towards infinity. @end deffn $expt @c snarfed from numbers.c:5270 @deffn {Scheme Procedure} $expt x y Return @var{x} raised to the power of @var{y}. This procedure does not accept complex arguments. @end deffn $atan2 @c snarfed from numbers.c:5286 @deffn {Scheme Procedure} $atan2 x y Return the arc tangent of the two arguments @var{x} and @var{y}. This is similar to calculating the arc tangent of @var{x} / @var{y}, except that the signs of both arguments are used to determine the quadrant of the result. This procedure does not accept complex arguments. @end deffn make-rectangular @c snarfed from numbers.c:5314 @deffn {Scheme Procedure} make-rectangular real imaginary Return a complex number constructed of the given @var{real} and @var{imaginary} parts. @end deffn make-polar @c snarfed from numbers.c:5338 @deffn {Scheme Procedure} make-polar x y Return the complex number @var{x} * e^(i * @var{y}). @end deffn inexact->exact @c snarfed from numbers.c:5541 @deffn {Scheme Procedure} inexact->exact z Return an exact number that is numerically closest to @var{z}. @end deffn rationalize @c snarfed from numbers.c:5578 @deffn {Scheme Procedure} rationalize x err Return an exact number that is within @var{err} of @var{x}. @end deffn entity? @c snarfed from objects.c:192 @deffn {Scheme Procedure} entity? obj Return @code{#t} if @var{obj} is an entity. @end deffn operator? @c snarfed from objects.c:201 @deffn {Scheme Procedure} operator? obj Return @code{#t} if @var{obj} is an operator. @end deffn valid-object-procedure? @c snarfed from objects.c:217 @deffn {Scheme Procedure} valid-object-procedure? proc Return @code{#t} iff @var{proc} is a procedure that can be used with @code{set-object-procedure}. It is always valid to use a closure constructed by @code{lambda}. @end deffn set-object-procedure! @c snarfed from objects.c:239 @deffn {Scheme Procedure} set-object-procedure! obj proc Set the object procedure of @var{obj} to @var{proc}. @var{obj} must be either an entity or an operator. @end deffn make-class-object @c snarfed from objects.c:299 @deffn {Scheme Procedure} make-class-object metaclass layout Create a new class object of class @var{metaclass}, with the slot layout specified by @var{layout}. @end deffn make-subclass-object @c snarfed from objects.c:314 @deffn {Scheme Procedure} make-subclass-object class layout Create a subclass object of @var{class}, with the slot layout specified by @var{layout}. @end deffn object-properties @c snarfed from objprop.c:36 @deffn {Scheme Procedure} object-properties obj Return @var{obj}'s property list. @end deffn set-object-properties! @c snarfed from objprop.c:46 @deffn {Scheme Procedure} set-object-properties! obj alist Set @var{obj}'s property list to @var{alist}. @end deffn object-property @c snarfed from objprop.c:57 @deffn {Scheme Procedure} object-property obj key Return the property of @var{obj} with name @var{key}. @end deffn set-object-property! @c snarfed from objprop.c:69 @deffn {Scheme Procedure} set-object-property! obj key value In @var{obj}'s property list, set the property named @var{key} to @var{value}. @end deffn cons @c snarfed from pairs.c:56 @deffn {Scheme Procedure} cons x y Return a newly allocated pair whose car is @var{x} and whose cdr is @var{y}. The pair is guaranteed to be different (in the sense of @code{eq?}) from every previously existing object. @end deffn pair? @c snarfed from pairs.c:74 @deffn {Scheme Procedure} pair? x Return @code{#t} if @var{x} is a pair; otherwise return @code{#f}. @end deffn set-car! @c snarfed from pairs.c:114 @deffn {Scheme Procedure} set-car! pair value Stores @var{value} in the car field of @var{pair}. The value returned by @code{set-car!} is unspecified. @end deffn set-cdr! @c snarfed from pairs.c:127 @deffn {Scheme Procedure} set-cdr! pair value Stores @var{value} in the cdr field of @var{pair}. The value returned by @code{set-cdr!} is unspecified. @end deffn char-ready? @c snarfed from ports.c:247 @deffn {Scheme Procedure} char-ready? [port] Return @code{#t} if a character is ready on input @var{port} and return @code{#f} otherwise. If @code{char-ready?} returns @code{#t} then the next @code{read-char} operation on @var{port} is guaranteed not to hang. If @var{port} is a file port at end of file then @code{char-ready?} returns @code{#t}. @code{char-ready?} exists to make it possible for a program to accept characters from interactive ports without getting stuck waiting for input. Any input editors associated with such ports must make sure that characters whose existence has been asserted by @code{char-ready?} cannot be rubbed out. If @code{char-ready?} were to return @code{#f} at end of file, a port at end of file would be indistinguishable from an interactive port that has no ready characters. @end deffn drain-input @c snarfed from ports.c:324 @deffn {Scheme Procedure} drain-input port This procedure clears a port's input buffers, similar to the way that force-output clears the output buffer. The contents of the buffers are returned as a single string, e.g., @lisp (define p (open-input-file ...)) (drain-input p) => empty string, nothing buffered yet. (unread-char (read-char p) p) (drain-input p) => initial chars from p, up to the buffer size. @end lisp Draining the buffers may be useful for cleanly finishing buffered I/O so that the file descriptor can be used directly for further input. @end deffn current-input-port @c snarfed from ports.c:357 @deffn {Scheme Procedure} current-input-port Return the current input port. This is the default port used by many input procedures. Initially, @code{current-input-port} returns the @dfn{standard input} in Unix and C terminology. @end deffn current-output-port @c snarfed from ports.c:369 @deffn {Scheme Procedure} current-output-port Return the current output port. This is the default port used by many output procedures. Initially, @code{current-output-port} returns the @dfn{standard output} in Unix and C terminology. @end deffn current-error-port @c snarfed from ports.c:379 @deffn {Scheme Procedure} current-error-port Return the port to which errors and warnings should be sent (the @dfn{standard error} in Unix and C terminology). @end deffn current-load-port @c snarfed from ports.c:389 @deffn {Scheme Procedure} current-load-port Return the current-load-port. The load port is used internally by @code{primitive-load}. @end deffn set-current-input-port @c snarfed from ports.c:402 @deffn {Scheme Procedure} set-current-input-port port @deffnx {Scheme Procedure} set-current-output-port port @deffnx {Scheme Procedure} set-current-error-port port Change the ports returned by @code{current-input-port}, @code{current-output-port} and @code{current-error-port}, respectively, so that they use the supplied @var{port} for input or output. @end deffn set-current-output-port @c snarfed from ports.c:415 @deffn {Scheme Procedure} set-current-output-port port Set the current default output port to @var{port}. @end deffn set-current-error-port @c snarfed from ports.c:429 @deffn {Scheme Procedure} set-current-error-port port Set the current default error port to @var{port}. @end deffn port-revealed @c snarfed from ports.c:627 @deffn {Scheme Procedure} port-revealed port Return the revealed count for @var{port}. @end deffn set-port-revealed! @c snarfed from ports.c:640 @deffn {Scheme Procedure} set-port-revealed! port rcount Sets the revealed count for a port to a given value. The return value is unspecified. @end deffn port-mode @c snarfed from ports.c:701 @deffn {Scheme Procedure} port-mode port Return the port modes associated with the open port @var{port}. These will not necessarily be identical to the modes used when the port was opened, since modes such as "append" which are used only during port creation are not retained. @end deffn close-port @c snarfed from ports.c:738 @deffn {Scheme Procedure} close-port port Close the specified port object. Return @code{#t} if it successfully closes a port or @code{#f} if it was already closed. An exception may be raised if an error occurs, for example when flushing buffered output. See also @ref{Ports and File Descriptors, close}, for a procedure which can close file descriptors. @end deffn close-input-port @c snarfed from ports.c:768 @deffn {Scheme Procedure} close-input-port port Close the specified input port object. The routine has no effect if the file has already been closed. An exception may be raised if an error occurs. The value returned is unspecified. See also @ref{Ports and File Descriptors, close}, for a procedure which can close file descriptors. @end deffn close-output-port @c snarfed from ports.c:783 @deffn {Scheme Procedure} close-output-port port Close the specified output port object. The routine has no effect if the file has already been closed. An exception may be raised if an error occurs. The value returned is unspecified. See also @ref{Ports and File Descriptors, close}, for a procedure which can close file descriptors. @end deffn port-for-each @c snarfed from ports.c:831 @deffn {Scheme Procedure} port-for-each proc Apply @var{proc} to each port in the Guile port table in turn. The return value is unspecified. More specifically, @var{proc} is applied exactly once to every port that exists in the system at the time @var{port-for-each} is invoked. Changes to the port table while @var{port-for-each} is running have no effect as far as @var{port-for-each} is concerned. @end deffn input-port? @c snarfed from ports.c:849 @deffn {Scheme Procedure} input-port? x Return @code{#t} if @var{x} is an input port, otherwise return @code{#f}. Any object satisfying this predicate also satisfies @code{port?}. @end deffn output-port? @c snarfed from ports.c:860 @deffn {Scheme Procedure} output-port? x Return @code{#t} if @var{x} is an output port, otherwise return @code{#f}. Any object satisfying this predicate also satisfies @code{port?}. @end deffn port? @c snarfed from ports.c:872 @deffn {Scheme Procedure} port? x Return a boolean indicating whether @var{x} is a port. Equivalent to @code{(or (input-port? @var{x}) (output-port? @var{x}))}. @end deffn port-closed? @c snarfed from ports.c:882 @deffn {Scheme Procedure} port-closed? port Return @code{#t} if @var{port} is closed or @code{#f} if it is open. @end deffn eof-object? @c snarfed from ports.c:893 @deffn {Scheme Procedure} eof-object? x Return @code{#t} if @var{x} is an end-of-file object; otherwise return @code{#f}. @end deffn force-output @c snarfed from ports.c:907 @deffn {Scheme Procedure} force-output [port] Flush the specified output port, or the current output port if @var{port} is omitted. The current output buffer contents are passed to the underlying port implementation (e.g., in the case of fports, the data will be written to the file and the output buffer will be cleared.) It has no effect on an unbuffered port. The return value is unspecified. @end deffn flush-all-ports @c snarfed from ports.c:925 @deffn {Scheme Procedure} flush-all-ports Equivalent to calling @code{force-output} on all open output ports. The return value is unspecified. @end deffn read-char @c snarfed from ports.c:945 @deffn {Scheme Procedure} read-char [port] Return the next character available from @var{port}, updating @var{port} to point to the following character. If no more characters are available, the end-of-file object is returned. @end deffn peek-char @c snarfed from ports.c:1289 @deffn {Scheme Procedure} peek-char [port] Return the next character available from @var{port}, @emph{without} updating @var{port} to point to the following character. If no more characters are available, the end-of-file object is returned. The value returned by a call to @code{peek-char} is the same as the value that would have been returned by a call to @code{read-char} on the same port. The only difference is that the very next call to @code{read-char} or @code{peek-char} on that @var{port} will return the value returned by the preceding call to @code{peek-char}. In particular, a call to @code{peek-char} on an interactive port will hang waiting for input whenever a call to @code{read-char} would have hung. @end deffn unread-char @c snarfed from ports.c:1312 @deffn {Scheme Procedure} unread-char cobj [port] Place @var{char} in @var{port} so that it will be read by the next read operation. If called multiple times, the unread characters will be read again in last-in first-out order. If @var{port} is not supplied, the current input port is used. @end deffn unread-string @c snarfed from ports.c:1335 @deffn {Scheme Procedure} unread-string str port Place the string @var{str} in @var{port} so that its characters will be read in subsequent read operations. If called multiple times, the unread characters will be read again in last-in first-out order. If @var{port} is not supplied, the current-input-port is used. @end deffn seek @c snarfed from ports.c:1374 @deffn {Scheme Procedure} seek fd_port offset whence Sets the current position of @var{fd/port} to the integer @var{offset}, which is interpreted according to the value of @var{whence}. One of the following variables should be supplied for @var{whence}: @defvar SEEK_SET Seek from the beginning of the file. @end defvar @defvar SEEK_CUR Seek from the current position. @end defvar @defvar SEEK_END Seek from the end of the file. @end defvar If @var{fd/port} is a file descriptor, the underlying system call is @code{lseek}. @var{port} may be a string port. The value returned is the new position in the file. This means that the current position of a port can be obtained using: @lisp (seek port 0 SEEK_CUR) @end lisp @end deffn truncate-file @c snarfed from ports.c:1431 @deffn {Scheme Procedure} truncate-file object [length] Truncates the object referred to by @var{object} to at most @var{length} bytes. @var{object} can be a string containing a file name or an integer file descriptor or a port. @var{length} may be omitted if @var{object} is not a file name, in which case the truncation occurs at the current port position. The return value is unspecified. @end deffn port-line @c snarfed from ports.c:1497 @deffn {Scheme Procedure} port-line port Return the current line number for @var{port}. The first line of a file is 0. But you might want to add 1 when printing line numbers, since starting from 1 is traditional in error messages, and likely to be more natural to non-programmers. @end deffn set-port-line! @c snarfed from ports.c:1509 @deffn {Scheme Procedure} set-port-line! port line Set the current line number for @var{port} to @var{line}. The first line of a file is 0. @end deffn port-column @c snarfed from ports.c:1528 @deffn {Scheme Procedure} port-column port Return the current column number of @var{port}. If the number is unknown, the result is #f. Otherwise, the result is a 0-origin integer - i.e. the first character of the first line is line 0, column 0. (However, when you display a file position, for example in an error message, we recommend you add 1 to get 1-origin integers. This is because lines and column numbers traditionally start with 1, and that is what non-programmers will find most natural.) @end deffn set-port-column! @c snarfed from ports.c:1540 @deffn {Scheme Procedure} set-port-column! port column Set the current column of @var{port}. Before reading the first character on a line the column should be 0. @end deffn port-filename @c snarfed from ports.c:1554 @deffn {Scheme Procedure} port-filename port Return the filename associated with @var{port}. This function returns the strings "standard input", "standard output" and "standard error" when called on the current input, output and error ports respectively. @end deffn set-port-filename! @c snarfed from ports.c:1568 @deffn {Scheme Procedure} set-port-filename! port filename Change the filename associated with @var{port}, using the current input port if none is specified. Note that this does not change the port's source of data, but only the value that is returned by @code{port-filename} and reported in diagnostic output. @end deffn %make-void-port @c snarfed from ports.c:1662 @deffn {Scheme Procedure} %make-void-port mode Create and return a new void port. A void port acts like @file{/dev/null}. The @var{mode} argument specifies the input/output modes for this port: see the documentation for @code{open-file} in @ref{File Ports}. @end deffn print-options-interface @c snarfed from print.c:94 @deffn {Scheme Procedure} print-options-interface [setting] Option interface for the print options. Instead of using this procedure directly, use the procedures @code{print-enable}, @code{print-disable}, @code{print-set!} and @code{print-options}. @end deffn simple-format @c snarfed from print.c:972 @deffn {Scheme Procedure} simple-format destination message . args Write @var{message} to @var{destination}, defaulting to the current output port. @var{message} can contain @code{~A} (was @code{%s}) and @code{~S} (was @code{%S}) escapes. When printed, the escapes are replaced with corresponding members of @var{ARGS}: @code{~A} formats using @code{display} and @code{~S} formats using @code{write}. If @var{destination} is @code{#t}, then use the current output port, if @var{destination} is @code{#f}, then return a string containing the formatted text. Does not add a trailing newline. @end deffn newline @c snarfed from print.c:1062 @deffn {Scheme Procedure} newline [port] Send a newline to @var{port}. If @var{port} is omitted, send to the current output port. @end deffn write-char @c snarfed from print.c:1077 @deffn {Scheme Procedure} write-char chr [port] Send character @var{chr} to @var{port}. @end deffn port-with-print-state @c snarfed from print.c:1131 @deffn {Scheme Procedure} port-with-print-state port [pstate] Create a new port which behaves like @var{port}, but with an included print state @var{pstate}. @var{pstate} is optional. If @var{pstate} isn't supplied and @var{port} already has a print state, the old print state is reused. @end deffn get-print-state @c snarfed from print.c:1144 @deffn {Scheme Procedure} get-print-state port Return the print state of the port @var{port}. If @var{port} has no associated print state, @code{#f} is returned. @end deffn procedure-properties @c snarfed from procprop.c:160 @deffn {Scheme Procedure} procedure-properties proc Return @var{obj}'s property list. @end deffn set-procedure-properties! @c snarfed from procprop.c:173 @deffn {Scheme Procedure} set-procedure-properties! proc new_val Set @var{obj}'s property list to @var{alist}. @end deffn procedure-property @c snarfed from procprop.c:186 @deffn {Scheme Procedure} procedure-property p k Return the property of @var{obj} with name @var{key}. @end deffn set-procedure-property! @c snarfed from procprop.c:209 @deffn {Scheme Procedure} set-procedure-property! p k v In @var{obj}'s property list, set the property named @var{key} to @var{value}. @end deffn procedure? @c snarfed from procs.c:162 @deffn {Scheme Procedure} procedure? obj Return @code{#t} if @var{obj} is a procedure. @end deffn closure? @c snarfed from procs.c:189 @deffn {Scheme Procedure} closure? obj Return @code{#t} if @var{obj} is a closure. @end deffn thunk? @c snarfed from procs.c:198 @deffn {Scheme Procedure} thunk? obj Return @code{#t} if @var{obj} is a thunk. @end deffn procedure-documentation @c snarfed from procs.c:248 @deffn {Scheme Procedure} procedure-documentation proc Return the documentation string associated with @code{proc}. By convention, if a procedure contains more than one expression and the first expression is a string constant, that string is assumed to contain documentation for that procedure. @end deffn procedure-with-setter? @c snarfed from procs.c:284 @deffn {Scheme Procedure} procedure-with-setter? obj Return @code{#t} if @var{obj} is a procedure with an associated setter procedure. @end deffn make-procedure-with-setter @c snarfed from procs.c:294 @deffn {Scheme Procedure} make-procedure-with-setter procedure setter Create a new procedure which behaves like @var{procedure}, but with the associated setter @var{setter}. @end deffn procedure @c snarfed from procs.c:308 @deffn {Scheme Procedure} procedure proc Return the procedure of @var{proc}, which must be either a procedure with setter, or an operator struct. @end deffn primitive-make-property @c snarfed from properties.c:40 @deffn {Scheme Procedure} primitive-make-property not_found_proc Create a @dfn{property token} that can be used with @code{primitive-property-ref} and @code{primitive-property-set!}. See @code{primitive-property-ref} for the significance of @var{not_found_proc}. @end deffn primitive-property-ref @c snarfed from properties.c:59 @deffn {Scheme Procedure} primitive-property-ref prop obj Return the property @var{prop} of @var{obj}. When no value has yet been associated with @var{prop} and @var{obj}, the @var{not-found-proc} from @var{prop} is used. A call @code{(@var{not-found-proc} @var{prop} @var{obj})} is made and the result set as the property value. If @var{not-found-proc} is @code{#f} then @code{#f} is the property value. @end deffn primitive-property-set! @c snarfed from properties.c:90 @deffn {Scheme Procedure} primitive-property-set! prop obj val Set the property @var{prop} of @var{obj} to @var{val}. @end deffn primitive-property-del! @c snarfed from properties.c:111 @deffn {Scheme Procedure} primitive-property-del! prop obj Remove any value associated with @var{prop} and @var{obj}. @end deffn random @c snarfed from random.c:343 @deffn {Scheme Procedure} random n [state] Return a number in [0, N). Accepts a positive integer or real n and returns a number of the same type between zero (inclusive) and N (exclusive). The values returned have a uniform distribution. The optional argument @var{state} must be of the type produced by @code{seed->random-state}. It defaults to the value of the variable @var{*random-state*}. This object is used to maintain the state of the pseudo-random-number generator and is altered as a side effect of the random operation. @end deffn copy-random-state @c snarfed from random.c:368 @deffn {Scheme Procedure} copy-random-state [state] Return a copy of the random state @var{state}. @end deffn seed->random-state @c snarfed from random.c:380 @deffn {Scheme Procedure} seed->random-state seed Return a new random state using @var{seed}. @end deffn random:uniform @c snarfed from random.c:398 @deffn {Scheme Procedure} random:uniform [state] Return a uniformly distributed inexact real random number in [0,1). @end deffn random:normal @c snarfed from random.c:413 @deffn {Scheme Procedure} random:normal [state] Return an inexact real in a normal distribution. The distribution used has mean 0 and standard deviation 1. For a normal distribution with mean m and standard deviation d use @code{(+ m (* d (random:normal)))}. @end deffn random:solid-sphere! @c snarfed from random.c:496 @deffn {Scheme Procedure} random:solid-sphere! v [state] Fills @var{vect} with inexact real random numbers the sum of whose squares is less than 1.0. Thinking of @var{vect} as coordinates in space of dimension @var{n} @math{=} @code{(vector-length @var{vect})}, the coordinates are uniformly distributed within the unit @var{n}-sphere. @end deffn random:hollow-sphere! @c snarfed from random.c:518 @deffn {Scheme Procedure} random:hollow-sphere! v [state] Fills vect with inexact real random numbers the sum of whose squares is equal to 1.0. Thinking of vect as coordinates in space of dimension n = (vector-length vect), the coordinates are uniformly distributed over the surface of the unit n-sphere. @end deffn random:normal-vector! @c snarfed from random.c:535 @deffn {Scheme Procedure} random:normal-vector! v [state] Fills vect with inexact real random numbers that are independent and standard normally distributed (i.e., with mean 0 and variance 1). @end deffn random:exp @c snarfed from random.c:573 @deffn {Scheme Procedure} random:exp [state] Return an inexact real in an exponential distribution with mean 1. For an exponential distribution with mean u use (* u (random:exp)). @end deffn %read-delimited! @c snarfed from rdelim.c:55 @deffn {Scheme Procedure} %read-delimited! delims str gobble [port [start [end]]] Read characters from @var{port} into @var{str} until one of the characters in the @var{delims} string is encountered. If @var{gobble} is true, discard the delimiter character; otherwise, leave it in the input stream for the next read. If @var{port} is not specified, use the value of @code{(current-input-port)}. If @var{start} or @var{end} are specified, store data only into the substring of @var{str} bounded by @var{start} and @var{end} (which default to the beginning and end of the string, respectively). Return a pair consisting of the delimiter that terminated the string and the number of characters read. If reading stopped at the end of file, the delimiter returned is the @var{eof-object}; if the string was filled without encountering a delimiter, this value is @code{#f}. @end deffn %read-line @c snarfed from rdelim.c:202 @deffn {Scheme Procedure} %read-line [port] Read a newline-terminated line from @var{port}, allocating storage as necessary. The newline terminator (if any) is removed from the string, and a pair consisting of the line and its delimiter is returned. The delimiter may be either a newline or the @var{eof-object}; if @code{%read-line} is called at the end of file, it returns the pair @code{(#<eof> . #<eof>)}. @end deffn write-line @c snarfed from rdelim.c:255 @deffn {Scheme Procedure} write-line obj [port] Display @var{obj} and a newline character to @var{port}. If @var{port} is not specified, @code{(current-output-port)} is used. This function is equivalent to: @lisp (display obj [port]) (newline [port]) @end lisp @end deffn read-options-interface @c snarfed from read.c:110 @deffn {Scheme Procedure} read-options-interface [setting] Option interface for the read options. Instead of using this procedure directly, use the procedures @code{read-enable}, @code{read-disable}, @code{read-set!} and @code{read-options}. @end deffn read @c snarfed from read.c:130 @deffn {Scheme Procedure} read [port] Read an s-expression from the input port @var{port}, or from the current input port if @var{port} is not specified. Any whitespace before the next token is discarded. @end deffn read-hash-extend @c snarfed from read.c:901 @deffn {Scheme Procedure} read-hash-extend chr proc Install the procedure @var{proc} for reading expressions starting with the character sequence @code{#} and @var{chr}. @var{proc} will be called with two arguments: the character @var{chr} and the port to read further data from. The object returned will be the return value of @code{read}. @end deffn call-with-dynamic-root @c snarfed from root.c:161 @deffn {Scheme Procedure} call-with-dynamic-root thunk handler Call @var{thunk} with a new dynamic state and withina continuation barrier. The @var{handler} catches allotherwise uncaught throws and executes within the samedynamic context as @var{thunk}. @end deffn dynamic-root @c snarfed from root.c:172 @deffn {Scheme Procedure} dynamic-root Return an object representing the current dynamic root. These objects are only useful for comparison using @code{eq?}. @end deffn read-string!/partial @c snarfed from rw.c:101 @deffn {Scheme Procedure} read-string!/partial str [port_or_fdes [start [end]]] Read characters from a port or file descriptor into a string @var{str}. A port must have an underlying file descriptor --- a so-called fport. This procedure is scsh-compatible and can efficiently read large strings. It will: @itemize @item attempt to fill the entire string, unless the @var{start} and/or @var{end} arguments are supplied. i.e., @var{start} defaults to 0 and @var{end} defaults to @code{(string-length str)} @item use the current input port if @var{port_or_fdes} is not supplied. @item return fewer than the requested number of characters in some cases, e.g., on end of file, if interrupted by a signal, or if not all the characters are immediately available. @item wait indefinitely for some input if no characters are currently available, unless the port is in non-blocking mode. @item read characters from the port's input buffers if available, instead from the underlying file descriptor. @item return @code{#f} if end-of-file is encountered before reading any characters, otherwise return the number of characters read. @item return 0 if the port is in non-blocking mode and no characters are immediately available. @item return 0 if the request is for 0 bytes, with no end-of-file check. @end itemize @end deffn write-string/partial @c snarfed from rw.c:205 @deffn {Scheme Procedure} write-string/partial str [port_or_fdes [start [end]]] Write characters from a string @var{str} to a port or file descriptor. A port must have an underlying file descriptor --- a so-called fport. This procedure is scsh-compatible and can efficiently write large strings. It will: @itemize @item attempt to write the entire string, unless the @var{start} and/or @var{end} arguments are supplied. i.e., @var{start} defaults to 0 and @var{end} defaults to @code{(string-length str)} @item use the current output port if @var{port_of_fdes} is not supplied. @item in the case of a buffered port, store the characters in the port's output buffer, if all will fit. If they will not fit then any existing buffered characters will be flushed before attempting to write the new characters directly to the underlying file descriptor. If the port is in non-blocking mode and buffered characters can not be flushed immediately, then an @code{EAGAIN} system-error exception will be raised (Note: scsh does not support the use of non-blocking buffered ports.) @item write fewer than the requested number of characters in some cases, e.g., if interrupted by a signal or if not all of the output can be accepted immediately. @item wait indefinitely for at least one character from @var{str} to be accepted by the port, unless the port is in non-blocking mode. @item return the number of characters accepted by the port. @item return 0 if the port is in non-blocking mode and can not accept at least one character from @var{str} immediately @item return 0 immediately if the request size is 0 bytes. @end itemize @end deffn sigaction @c snarfed from scmsigs.c:278 @deffn {Scheme Procedure} sigaction signum [handler [flags [thread]]] Install or report the signal handler for a specified signal. @var{signum} is the signal number, which can be specified using the value of variables such as @code{SIGINT}. If @var{handler} is omitted, @code{sigaction} returns a pair: the CAR is the current signal hander, which will be either an integer with the value @code{SIG_DFL} (default action) or @code{SIG_IGN} (ignore), or the Scheme procedure which handles the signal, or @code{#f} if a non-Scheme procedure handles the signal. The CDR contains the current @code{sigaction} flags for the handler. If @var{handler} is provided, it is installed as the new handler for @var{signum}. @var{handler} can be a Scheme procedure taking one argument, or the value of @code{SIG_DFL} (default action) or @code{SIG_IGN} (ignore), or @code{#f} to restore whatever signal handler was installed before @code{sigaction} was first used. When a scheme procedure has been specified, that procedure will run in the given @var{thread}. When no thread has been given, the thread that made this call to @code{sigaction} is used. Flags can optionally be specified for the new handler (@code{SA_RESTART} will always be added if it's available and the system is using restartable system calls.) The return value is a pair with information about the old handler as described above. This interface does not provide access to the "signal blocking" facility. Maybe this is not needed, since the thread support may provide solutions to the problem of consistent access to data structures. @end deffn restore-signals @c snarfed from scmsigs.c:452 @deffn {Scheme Procedure} restore-signals Return all signal handlers to the values they had before any call to @code{sigaction} was made. The return value is unspecified. @end deffn alarm @c snarfed from scmsigs.c:489 @deffn {Scheme Procedure} alarm i Set a timer to raise a @code{SIGALRM} signal after the specified number of seconds (an integer). It's advisable to install a signal handler for @code{SIGALRM} beforehand, since the default action is to terminate the process. The return value indicates the time remaining for the previous alarm, if any. The new value replaces the previous alarm. If there was no previous alarm, the return value is zero. @end deffn setitimer @c snarfed from scmsigs.c:516 @deffn {Scheme Procedure} setitimer which_timer interval_seconds interval_microseconds value_seconds value_microseconds Set the timer specified by @var{which_timer} according to the given @var{interval_seconds}, @var{interval_microseconds}, @var{value_seconds}, and @var{value_microseconds} values. Return information about the timer's previous setting. Errors are handled as described in the guile info pages under ``POSIX Interface Conventions''. The timers available are: @code{ITIMER_REAL}, @code{ITIMER_VIRTUAL}, and @code{ITIMER_PROF}. The return value will be a list of two cons pairs representing the current state of the given timer. The first pair is the seconds and microseconds of the timer @code{it_interval}, and the second pair is the seconds and microseconds of the timer @code{it_value}. @end deffn getitimer @c snarfed from scmsigs.c:557 @deffn {Scheme Procedure} getitimer which_timer Return information about the timer specified by @var{which_timer} Errors are handled as described in the guile info pages under ``POSIX Interface Conventions''. The timers available are: @code{ITIMER_REAL}, @code{ITIMER_VIRTUAL}, and @code{ITIMER_PROF}. The return value will be a list of two cons pairs representing the current state of the given timer. The first pair is the seconds and microseconds of the timer @code{it_interval}, and the second pair is the seconds and microseconds of the timer @code{it_value}. @end deffn pause @c snarfed from scmsigs.c:584 @deffn {Scheme Procedure} pause Pause the current process (thread?) until a signal arrives whose action is to either terminate the current process or invoke a handler procedure. The return value is unspecified. @end deffn sleep @c snarfed from scmsigs.c:597 @deffn {Scheme Procedure} sleep i Wait for the given number of seconds (an integer) or until a signal arrives. The return value is zero if the time elapses or the number of seconds remaining otherwise. @end deffn usleep @c snarfed from scmsigs.c:606 @deffn {Scheme Procedure} usleep i Sleep for @var{i} microseconds. @end deffn raise @c snarfed from scmsigs.c:616 @deffn {Scheme Procedure} raise sig Sends a specified signal @var{sig} to the current process, where @var{sig} is as described for the kill procedure. @end deffn system @c snarfed from simpos.c:64 @deffn {Scheme Procedure} system [cmd] Execute @var{cmd} using the operating system's "command processor". Under Unix this is usually the default shell @code{sh}. The value returned is @var{cmd}'s exit status as returned by @code{waitpid}, which can be interpreted using @code{status:exit-val} and friends. If @code{system} is called without arguments, return a boolean indicating whether the command processor is available. @end deffn system* @c snarfed from simpos.c:114 @deffn {Scheme Procedure} system* . args Execute the command indicated by @var{args}. The first element must be a string indicating the command to be executed, and the remaining items must be strings representing each of the arguments to that command. This function returns the exit status of the command as provided by @code{waitpid}. This value can be handled with @code{status:exit-val} and the related functions. @code{system*} is similar to @code{system}, but accepts only one string per-argument, and performs no shell interpretation. The command is executed using fork and execlp. Accordingly this function may be safer than @code{system} in situations where shell interpretation is not required. Example: (system* "echo" "foo" "bar") @end deffn getenv @c snarfed from simpos.c:184 @deffn {Scheme Procedure} getenv nam Looks up the string @var{name} in the current environment. The return value is @code{#f} unless a string of the form @code{NAME=VALUE} is found, in which case the string @code{VALUE} is returned. @end deffn primitive-exit @c snarfed from simpos.c:200 @deffn {Scheme Procedure} primitive-exit [status] Terminate the current process without unwinding the Scheme stack. The exit status is @var{status} if supplied, otherwise zero. @end deffn primitive-_exit @c snarfed from simpos.c:218 @deffn {Scheme Procedure} primitive-_exit [status] Terminate the current process using the _exit() system call and without unwinding the Scheme stack. The exit status is @var{status} if supplied, otherwise zero. This function is typically useful after a fork, to ensure no Scheme cleanups or @code{atexit} handlers are run (those usually belonging in the parent rather than the child). @end deffn restricted-vector-sort! @c snarfed from sort.c:78 @deffn {Scheme Procedure} restricted-vector-sort! vec less startpos endpos Sort the vector @var{vec}, using @var{less} for comparing the vector elements. @var{startpos} (inclusively) and @var{endpos} (exclusively) delimit the range of the vector which gets sorted. The return value is not specified. @end deffn sorted? @c snarfed from sort.c:111 @deffn {Scheme Procedure} sorted? items less Return @code{#t} iff @var{items} is a list or a vector such that for all 1 <= i <= m, the predicate @var{less} returns true when applied to all elements i - 1 and i @end deffn merge @c snarfed from sort.c:186 @deffn {Scheme Procedure} merge alist blist less Merge two already sorted lists into one. Given two lists @var{alist} and @var{blist}, such that @code{(sorted? alist less?)} and @code{(sorted? blist less?)}, return a new list in which the elements of @var{alist} and @var{blist} have been stably interleaved so that @code{(sorted? (merge alist blist less?) less?)}. Note: this does _not_ accept vectors. @end deffn merge! @c snarfed from sort.c:303 @deffn {Scheme Procedure} merge! alist blist less Takes two lists @var{alist} and @var{blist} such that @code{(sorted? alist less?)} and @code{(sorted? blist less?)} and returns a new list in which the elements of @var{alist} and @var{blist} have been stably interleaved so that @code{(sorted? (merge alist blist less?) less?)}. This is the destructive variant of @code{merge} Note: this does _not_ accept vectors. @end deffn sort! @c snarfed from sort.c:373 @deffn {Scheme Procedure} sort! items less Sort the sequence @var{items}, which may be a list or a vector. @var{less} is used for comparing the sequence elements. The sorting is destructive, that means that the input sequence is modified to produce the sorted result. This is not a stable sort. @end deffn sort @c snarfed from sort.c:404 @deffn {Scheme Procedure} sort items less Sort the sequence @var{items}, which may be a list or a vector. @var{less} is used for comparing the sequence elements. This is not a stable sort. @end deffn stable-sort! @c snarfed from sort.c:487 @deffn {Scheme Procedure} stable-sort! items less Sort the sequence @var{items}, which may be a list or a vector. @var{less} is used for comparing the sequence elements. The sorting is destructive, that means that the input sequence is modified to produce the sorted result. This is a stable sort. @end deffn stable-sort @c snarfed from sort.c:531 @deffn {Scheme Procedure} stable-sort items less Sort the sequence @var{items}, which may be a list or a vector. @var{less} is used for comparing the sequence elements. This is a stable sort. @end deffn sort-list! @c snarfed from sort.c:549 @deffn {Scheme Procedure} sort-list! items less Sort the list @var{items}, using @var{less} for comparing the list elements. The sorting is destructive, that means that the input list is modified to produce the sorted result. This is a stable sort. @end deffn sort-list @c snarfed from sort.c:564 @deffn {Scheme Procedure} sort-list items less Sort the list @var{items}, using @var{less} for comparing the list elements. This is a stable sort. @end deffn source-properties @c snarfed from srcprop.c:153 @deffn {Scheme Procedure} source-properties obj Return the source property association list of @var{obj}. @end deffn set-source-properties! @c snarfed from srcprop.c:176 @deffn {Scheme Procedure} set-source-properties! obj plist Install the association list @var{plist} as the source property list for @var{obj}. @end deffn source-property @c snarfed from srcprop.c:194 @deffn {Scheme Procedure} source-property obj key Return the source property specified by @var{key} from @var{obj}'s source property list. @end deffn set-source-property! @c snarfed from srcprop.c:225 @deffn {Scheme Procedure} set-source-property! obj key datum Set the source property of object @var{obj}, which is specified by @var{key} to @var{datum}. Normally, the key will be a symbol. @end deffn stack? @c snarfed from stacks.c:391 @deffn {Scheme Procedure} stack? obj Return @code{#t} if @var{obj} is a calling stack. @end deffn make-stack @c snarfed from stacks.c:422 @deffn {Scheme Procedure} make-stack obj . args Create a new stack. If @var{obj} is @code{#t}, the current evaluation stack is used for creating the stack frames, otherwise the frames are taken from @var{obj} (which must be either a debug object or a continuation). @var{args} should be a list containing any combination of integer, procedure and @code{#t} values. These values specify various ways of cutting away uninteresting stack frames from the top and bottom of the stack that @code{make-stack} returns. They come in pairs like this: @code{(@var{inner_cut_1} @var{outer_cut_1} @var{inner_cut_2} @var{outer_cut_2} @dots{})}. Each @var{inner_cut_N} can be @code{#t}, an integer, or a procedure. @code{#t} means to cut away all frames up to but excluding the first user module frame. An integer means to cut away exactly that number of frames. A procedure means to cut away all frames up to but excluding the application frame whose procedure matches the specified one. Each @var{outer_cut_N} can be an integer or a procedure. An integer means to cut away that number of frames. A procedure means to cut away frames down to but excluding the application frame whose procedure matches the specified one. If the @var{outer_cut_N} of the last pair is missing, it is taken as 0. @end deffn stack-id @c snarfed from stacks.c:511 @deffn {Scheme Procedure} stack-id stack Return the identifier given to @var{stack} by @code{start-stack}. @end deffn stack-ref @c snarfed from stacks.c:549 @deffn {Scheme Procedure} stack-ref stack index Return the @var{index}'th frame from @var{stack}. @end deffn stack-length @c snarfed from stacks.c:562 @deffn {Scheme Procedure} stack-length stack Return the length of @var{stack}. @end deffn frame? @c snarfed from stacks.c:575 @deffn {Scheme Procedure} frame? obj Return @code{#t} if @var{obj} is a stack frame. @end deffn last-stack-frame @c snarfed from stacks.c:586 @deffn {Scheme Procedure} last-stack-frame obj Return a stack which consists of a single frame, which is the last stack frame for @var{obj}. @var{obj} must be either a debug object or a continuation. @end deffn frame-number @c snarfed from stacks.c:625 @deffn {Scheme Procedure} frame-number frame Return the frame number of @var{frame}. @end deffn frame-source @c snarfed from stacks.c:635 @deffn {Scheme Procedure} frame-source frame Return the source of @var{frame}. @end deffn frame-procedure @c snarfed from stacks.c:646 @deffn {Scheme Procedure} frame-procedure frame Return the procedure for @var{frame}, or @code{#f} if no procedure is associated with @var{frame}. @end deffn frame-arguments @c snarfed from stacks.c:658 @deffn {Scheme Procedure} frame-arguments frame Return the arguments of @var{frame}. @end deffn frame-previous @c snarfed from stacks.c:669 @deffn {Scheme Procedure} frame-previous frame Return the previous frame of @var{frame}, or @code{#f} if @var{frame} is the first frame in its stack. @end deffn frame-next @c snarfed from stacks.c:685 @deffn {Scheme Procedure} frame-next frame Return the next frame of @var{frame}, or @code{#f} if @var{frame} is the last frame in its stack. @end deffn frame-real? @c snarfed from stacks.c:700 @deffn {Scheme Procedure} frame-real? frame Return @code{#t} if @var{frame} is a real frame. @end deffn frame-procedure? @c snarfed from stacks.c:710 @deffn {Scheme Procedure} frame-procedure? frame Return @code{#t} if a procedure is associated with @var{frame}. @end deffn frame-evaluating-args? @c snarfed from stacks.c:720 @deffn {Scheme Procedure} frame-evaluating-args? frame Return @code{#t} if @var{frame} contains evaluated arguments. @end deffn frame-overflow? @c snarfed from stacks.c:730 @deffn {Scheme Procedure} frame-overflow? frame Return @code{#t} if @var{frame} is an overflow frame. @end deffn get-internal-real-time @c snarfed from stime.c:133 @deffn {Scheme Procedure} get-internal-real-time Return the number of time units since the interpreter was started. @end deffn times @c snarfed from stime.c:180 @deffn {Scheme Procedure} times Return an object with information about real and processor time. The following procedures accept such an object as an argument and return a selected component: @table @code @item tms:clock The current real time, expressed as time units relative to an arbitrary base. @item tms:utime The CPU time units used by the calling process. @item tms:stime The CPU time units used by the system on behalf of the calling process. @item tms:cutime The CPU time units used by terminated child processes of the calling process, whose status has been collected (e.g., using @code{waitpid}). @item tms:cstime Similarly, the CPU times units used by the system on behalf of terminated child processes. @end table @end deffn get-internal-run-time @c snarfed from stime.c:212 @deffn {Scheme Procedure} get-internal-run-time Return the number of time units of processor time used by the interpreter. Both @emph{system} and @emph{user} time are included but subprocesses are not. @end deffn current-time @c snarfed from stime.c:229 @deffn {Scheme Procedure} current-time Return the number of seconds since 1970-01-01 00:00:00 UTC, excluding leap seconds. @end deffn gettimeofday @c snarfed from stime.c:248 @deffn {Scheme Procedure} gettimeofday Return a pair containing the number of seconds and microseconds since 1970-01-01 00:00:00 UTC, excluding leap seconds. Note: whether true microsecond resolution is available depends on the operating system. @end deffn localtime @c snarfed from stime.c:364 @deffn {Scheme Procedure} localtime time [zone] Return an object representing the broken down components of @var{time}, an integer like the one returned by @code{current-time}. The time zone for the calculation is optionally specified by @var{zone} (a string), otherwise the @code{TZ} environment variable or the system default is used. @end deffn gmtime @c snarfed from stime.c:449 @deffn {Scheme Procedure} gmtime time Return an object representing the broken down components of @var{time}, an integer like the one returned by @code{current-time}. The values are calculated for UTC. @end deffn mktime @c snarfed from stime.c:519 @deffn {Scheme Procedure} mktime sbd_time [zone] @var{bd-time} is an object representing broken down time and @code{zone} is an optional time zone specifier (otherwise the TZ environment variable or the system default is used). Returns a pair: the car is a corresponding integer time value like that returned by @code{current-time}; the cdr is a broken down time object, similar to as @var{bd-time} but with normalized values. @end deffn tzset @c snarfed from stime.c:605 @deffn {Scheme Procedure} tzset Initialize the timezone from the TZ environment variable or the system default. It's not usually necessary to call this procedure since it's done automatically by other procedures that depend on the timezone. @end deffn strftime @c snarfed from stime.c:631 @deffn {Scheme Procedure} strftime format stime Return a string which is broken-down time structure @var{stime} formatted according to the given @var{format} string. @var{format} contains field specifications introduced by a @samp{%} character. See @ref{Formatting Calendar Time,,, libc, The GNU C Library Reference Manual}, or @samp{man 3 strftime}, for the available formatting. @lisp (strftime "%c" (localtime (current-time))) @result{} "Mon Mar 11 20:17:43 2002" @end lisp If @code{setlocale} has been called (@pxref{Locales}), month and day names are from the current locale and in the locale character set. @end deffn strptime @c snarfed from stime.c:731 @deffn {Scheme Procedure} strptime format string Performs the reverse action to @code{strftime}, parsing @var{string} according to the specification supplied in @var{template}. The interpretation of month and day names is dependent on the current locale. The value returned is a pair. The car has an object with time components in the form returned by @code{localtime} or @code{gmtime}, but the time zone components are not usefully set. The cdr reports the number of characters from @var{string} which were used for the conversion. @end deffn string? @c snarfed from strings.c:560 @deffn {Scheme Procedure} string? obj Return @code{#t} if @var{obj} is a string, else @code{#f}. @end deffn list->string @c snarfed from strings.c:568 @deffn {Scheme Procedure} list->string implemented by the C function "scm_string" @end deffn string @c snarfed from strings.c:574 @deffn {Scheme Procedure} string . chrs @deffnx {Scheme Procedure} list->string chrs Return a newly allocated string composed of the arguments, @var{chrs}. @end deffn make-string @c snarfed from strings.c:612 @deffn {Scheme Procedure} make-string k [chr] Return a newly allocated string of length @var{k}. If @var{chr} is given, then all elements of the string are initialized to @var{chr}, otherwise the contents of the @var{string} are unspecified. @end deffn string-length @c snarfed from strings.c:638 @deffn {Scheme Procedure} string-length string Return the number of characters in @var{string}. @end deffn string-ref @c snarfed from strings.c:657 @deffn {Scheme Procedure} string-ref str k Return character @var{k} of @var{str} using zero-origin indexing. @var{k} must be a valid index of @var{str}. @end deffn string-set! @c snarfed from strings.c:680 @deffn {Scheme Procedure} string-set! str k chr Store @var{chr} in element @var{k} of @var{str} and return an unspecified value. @var{k} must be a valid index of @var{str}. @end deffn substring @c snarfed from strings.c:716 @deffn {Scheme Procedure} substring str start [end] Return a newly allocated string formed from the characters of @var{str} beginning with index @var{start} (inclusive) and ending with index @var{end} (exclusive). @var{str} must be a string, @var{start} and @var{end} must be exact integers satisfying: 0 <= @var{start} <= @var{end} <= (string-length @var{str}). @end deffn substring/read-only @c snarfed from strings.c:742 @deffn {Scheme Procedure} substring/read-only str start [end] Return a newly allocated string formed from the characters of @var{str} beginning with index @var{start} (inclusive) and ending with index @var{end} (exclusive). @var{str} must be a string, @var{start} and @var{end} must be exact integers satisfying: 0 <= @var{start} <= @var{end} <= (string-length @var{str}). The returned string is read-only. @end deffn substring/copy @c snarfed from strings.c:765 @deffn {Scheme Procedure} substring/copy str start [end] Return a newly allocated string formed from the characters of @var{str} beginning with index @var{start} (inclusive) and ending with index @var{end} (exclusive). @var{str} must be a string, @var{start} and @var{end} must be exact integers satisfying: 0 <= @var{start} <= @var{end} <= (string-length @var{str}). @end deffn substring/shared @c snarfed from strings.c:789 @deffn {Scheme Procedure} substring/shared str start [end] Return string that indirectly refers to the characters of @var{str} beginning with index @var{start} (inclusive) and ending with index @var{end} (exclusive). @var{str} must be a string, @var{start} and @var{end} must be exact integers satisfying: 0 <= @var{start} <= @var{end} <= (string-length @var{str}). @end deffn string-append @c snarfed from strings.c:808 @deffn {Scheme Procedure} string-append . args Return a newly allocated string whose characters form the concatenation of the given strings, @var{args}. @end deffn uniform-vector? @c snarfed from srfi-4.c:651 @deffn {Scheme Procedure} uniform-vector? obj Return @code{#t} if @var{obj} is a uniform vector. @end deffn uniform-vector-ref @c snarfed from srfi-4.c:677 @deffn {Scheme Procedure} uniform-vector-ref v idx Return the element at index @var{idx} of the homogenous numeric vector @var{v}. @end deffn uniform-vector-set! @c snarfed from srfi-4.c:714 @deffn {Scheme Procedure} uniform-vector-set! v idx val Set the element at index @var{idx} of the homogenous numeric vector @var{v} to @var{val}. @end deffn uniform-vector->list @c snarfed from srfi-4.c:737 @deffn {Scheme Procedure} uniform-vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn uniform-vector-length @c snarfed from srfi-4.c:820 @deffn {Scheme Procedure} uniform-vector-length v Return the number of elements in the uniform vector @var{v}. @end deffn uniform-vector-read! @c snarfed from srfi-4.c:845 @deffn {Scheme Procedure} uniform-vector-read! uvec [port_or_fd [start [end]]] Fill the elements of @var{uvec} by reading raw bytes from @var{port-or-fdes}, using host byte order. The optional arguments @var{start} (inclusive) and @var{end} (exclusive) allow a specified region to be read, leaving the remainder of the vector unchanged. When @var{port-or-fdes} is a port, all specified elements of @var{uvec} are attempted to be read, potentially blocking while waiting formore input or end-of-file. When @var{port-or-fd} is an integer, a single call to read(2) is made. An error is signalled when the last element has only been partially filled before reaching end-of-file or in the single call to read(2). @code{uniform-vector-read!} returns the number of elements read. @var{port-or-fdes} may be omitted, in which case it defaults to the value returned by @code{(current-input-port)}. @end deffn uniform-vector-write @c snarfed from srfi-4.c:958 @deffn {Scheme Procedure} uniform-vector-write uvec [port_or_fd [start [end]]] Write the elements of @var{uvec} as raw bytes to @var{port-or-fdes}, in the host byte order. The optional arguments @var{start} (inclusive) and @var{end} (exclusive) allow a specified region to be written. When @var{port-or-fdes} is a port, all specified elements of @var{uvec} are attempted to be written, potentially blocking while waiting for more room. When @var{port-or-fd} is an integer, a single call to write(2) is made. An error is signalled when the last element has only been partially written in the single call to write(2). The number of objects actually written is returned. @var{port-or-fdes} may be omitted, in which case it defaults to the value returned by @code{(current-output-port)}. @end deffn u8vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} u8vector? obj Return @code{#t} if @var{obj} is a vector of type u8, @code{#f} otherwise. @end deffn make-u8vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-u8vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn u8vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} u8vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn u8vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} u8vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn u8vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} u8vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn u8vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} u8vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn u8vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} u8vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->u8vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->u8vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->u8vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->u8vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type u8. @end deffn s8vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} s8vector? obj Return @code{#t} if @var{obj} is a vector of type s8, @code{#f} otherwise. @end deffn make-s8vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-s8vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn s8vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} s8vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn s8vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} s8vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn s8vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} s8vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn s8vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} s8vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn s8vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} s8vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->s8vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->s8vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->s8vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->s8vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type s8. @end deffn u16vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} u16vector? obj Return @code{#t} if @var{obj} is a vector of type u16, @code{#f} otherwise. @end deffn make-u16vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-u16vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn u16vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} u16vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn u16vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} u16vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn u16vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} u16vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn u16vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} u16vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn u16vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} u16vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->u16vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->u16vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->u16vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->u16vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type u16. @end deffn s16vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} s16vector? obj Return @code{#t} if @var{obj} is a vector of type s16, @code{#f} otherwise. @end deffn make-s16vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-s16vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn s16vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} s16vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn s16vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} s16vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn s16vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} s16vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn s16vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} s16vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn s16vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} s16vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->s16vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->s16vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->s16vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->s16vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type s16. @end deffn u32vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} u32vector? obj Return @code{#t} if @var{obj} is a vector of type u32, @code{#f} otherwise. @end deffn make-u32vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-u32vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn u32vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} u32vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn u32vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} u32vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn u32vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} u32vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn u32vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} u32vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn u32vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} u32vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->u32vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->u32vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->u32vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->u32vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type u32. @end deffn s32vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} s32vector? obj Return @code{#t} if @var{obj} is a vector of type s32, @code{#f} otherwise. @end deffn make-s32vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-s32vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn s32vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} s32vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn s32vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} s32vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn s32vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} s32vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn s32vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} s32vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn s32vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} s32vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->s32vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->s32vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->s32vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->s32vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type s32. @end deffn u64vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} u64vector? obj Return @code{#t} if @var{obj} is a vector of type u64, @code{#f} otherwise. @end deffn make-u64vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-u64vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn u64vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} u64vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn u64vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} u64vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn u64vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} u64vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn u64vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} u64vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn u64vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} u64vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->u64vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->u64vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->u64vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->u64vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type u64. @end deffn s64vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} s64vector? obj Return @code{#t} if @var{obj} is a vector of type s64, @code{#f} otherwise. @end deffn make-s64vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-s64vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn s64vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} s64vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn s64vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} s64vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn s64vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} s64vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn s64vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} s64vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn s64vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} s64vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->s64vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->s64vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->s64vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->s64vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type s64. @end deffn f32vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} f32vector? obj Return @code{#t} if @var{obj} is a vector of type f32, @code{#f} otherwise. @end deffn make-f32vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-f32vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn f32vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} f32vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn f32vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} f32vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn f32vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} f32vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn f32vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} f32vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn f32vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} f32vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->f32vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->f32vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->f32vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->f32vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type f32. @end deffn f64vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} f64vector? obj Return @code{#t} if @var{obj} is a vector of type f64, @code{#f} otherwise. @end deffn make-f64vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-f64vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn f64vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} f64vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn f64vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} f64vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn f64vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} f64vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn f64vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} f64vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn f64vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} f64vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->f64vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->f64vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->f64vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->f64vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type f64. @end deffn c32vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} c32vector? obj Return @code{#t} if @var{obj} is a vector of type c32, @code{#f} otherwise. @end deffn make-c32vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-c32vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn c32vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} c32vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn c32vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} c32vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn c32vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} c32vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn c32vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} c32vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn c32vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} c32vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->c32vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->c32vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->c32vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->c32vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type c32. @end deffn c64vector? @c snarfed from ../libguile/srfi-4.i.c:41 @deffn {Scheme Procedure} c64vector? obj Return @code{#t} if @var{obj} is a vector of type c64, @code{#f} otherwise. @end deffn make-c64vector @c snarfed from ../libguile/srfi-4.i.c:53 @deffn {Scheme Procedure} make-c64vector len [fill] Return a newly allocated uniform numeric vector which can hold @var{len} elements. If @var{fill} is given, it is used to initialize the elements, otherwise the contents of the vector is unspecified. @end deffn c64vector @c snarfed from ../libguile/srfi-4.i.c:63 @deffn {Scheme Procedure} c64vector . l Return a newly allocated uniform numeric vector containing all argument values. @end deffn c64vector-length @c snarfed from ../libguile/srfi-4.i.c:74 @deffn {Scheme Procedure} c64vector-length uvec Return the number of elements in the uniform numeric vector @var{uvec}. @end deffn c64vector-ref @c snarfed from ../libguile/srfi-4.i.c:85 @deffn {Scheme Procedure} c64vector-ref uvec index Return the element at @var{index} in the uniform numeric vector @var{uvec}. @end deffn c64vector-set! @c snarfed from ../libguile/srfi-4.i.c:97 @deffn {Scheme Procedure} c64vector-set! uvec index value Set the element at @var{index} in the uniform numeric vector @var{uvec} to @var{value}. The return value is not specified. @end deffn c64vector->list @c snarfed from ../libguile/srfi-4.i.c:107 @deffn {Scheme Procedure} c64vector->list uvec Convert the uniform numeric vector @var{uvec} to a list. @end deffn list->c64vector @c snarfed from ../libguile/srfi-4.i.c:117 @deffn {Scheme Procedure} list->c64vector l Convert the list @var{l} to a numeric uniform vector. @end deffn any->c64vector @c snarfed from ../libguile/srfi-4.i.c:128 @deffn {Scheme Procedure} any->c64vector obj Convert @var{obj}, which can be a list, vector, or uniform vector, to a numeric uniform vector of type c64. @end deffn string-null? @c snarfed from srfi-13.c:74 @deffn {Scheme Procedure} string-null? str Return @code{#t} if @var{str}'s length is zero, and @code{#f} otherwise. @lisp (string-null? "") @result{} #t y @result{} "foo" (string-null? y) @result{} #f @end lisp @end deffn string-any-c-code @c snarfed from srfi-13.c:106 @deffn {Scheme Procedure} string-any-c-code char_pred s [start [end]] Check if @var{char_pred} is true for any character in string @var{s}. @var{char_pred} can be a character to check for any equal to that, or a character set (@pxref{Character Sets}) to check for any in that set, or a predicate procedure to call. For a procedure, calls @code{(@var{char_pred} c)} are made successively on the characters from @var{start} to @var{end}. If @var{char_pred} returns true (ie.@: non-@code{#f}), @code{string-any} stops and that return value is the return from @code{string-any}. The call on the last character (ie.@: at @math{@var{end}-1}), if that point is reached, is a tail call. If there are no characters in @var{s} (ie.@: @var{start} equals @var{end}) then the return is @code{#f}. @end deffn string-every-c-code @c snarfed from srfi-13.c:171 @deffn {Scheme Procedure} string-every-c-code char_pred s [start [end]] Check if @var{char_pred} is true for every character in string @var{s}. @var{char_pred} can be a character to check for every character equal to that, or a character set (@pxref{Character Sets}) to check for every character being in that set, or a predicate procedure to call. For a procedure, calls @code{(@var{char_pred} c)} are made successively on the characters from @var{start} to @var{end}. If @var{char_pred} returns @code{#f}, @code{string-every} stops and returns @code{#f}. The call on the last character (ie.@: at @math{@var{end}-1}), if that point is reached, is a tail call and the return from that call is the return from @code{string-every}. If there are no characters in @var{s} (ie.@: @var{start} equals @var{end}) then the return is @code{#t}. @end deffn string-tabulate @c snarfed from srfi-13.c:228 @deffn {Scheme Procedure} string-tabulate proc len @var{proc} is an integer->char procedure. Construct a string of size @var{len} by applying @var{proc} to each index to produce the corresponding string element. The order in which @var{proc} is applied to the indices is not specified. @end deffn string->list @c snarfed from srfi-13.c:263 @deffn {Scheme Procedure} string->list str [start [end]] Convert the string @var{str} into a list of characters. @end deffn reverse-list->string @c snarfed from srfi-13.c:302 @deffn {Scheme Procedure} reverse-list->string chrs An efficient implementation of @code{(compose string->list reverse)}: @smalllisp (reverse-list->string '(#\a #\B #\c)) @result{} "cBa" @end smalllisp @end deffn string-join @c snarfed from srfi-13.c:369 @deffn {Scheme Procedure} string-join ls [delimiter [grammar]] Append the string in the string list @var{ls}, using the string @var{delim} as a delimiter between the elements of @var{ls}. @var{grammar} is a symbol which specifies how the delimiter is placed between the strings, and defaults to the symbol @code{infix}. @table @code @item infix Insert the separator between list elements. An empty string will produce an empty list. @item string-infix Like @code{infix}, but will raise an error if given the empty list. @item suffix Insert the separator after every list element. @item prefix Insert the separator before each list element. @end table @end deffn string-copy @c snarfed from srfi-13.c:503 @deffn {Scheme Procedure} string-copy str [start [end]] Return a freshly allocated copy of the string @var{str}. If given, @var{start} and @var{end} delimit the portion of @var{str} which is copied. @end deffn string-copy! @c snarfed from srfi-13.c:530 @deffn {Scheme Procedure} string-copy! target tstart s [start [end]] Copy the sequence of characters from index range [@var{start}, @var{end}) in string @var{s} to string @var{target}, beginning at index @var{tstart}. The characters are copied left-to-right or right-to-left as needed -- the copy is guaranteed to work, even if @var{target} and @var{s} are the same string. It is an error if the copy operation runs off the end of the target string. @end deffn substring-move! @c snarfed from srfi-13.c:560 @deffn {Scheme Procedure} substring-move! str1 start1 end1 str2 start2 Copy the substring of @var{str1} bounded by @var{start1} and @var{end1} into @var{str2} beginning at position @var{start2}. @var{str1} and @var{str2} can be the same string. @end deffn string-take @c snarfed from srfi-13.c:569 @deffn {Scheme Procedure} string-take s n Return the @var{n} first characters of @var{s}. @end deffn string-drop @c snarfed from srfi-13.c:579 @deffn {Scheme Procedure} string-drop s n Return all but the first @var{n} characters of @var{s}. @end deffn string-take-right @c snarfed from srfi-13.c:589 @deffn {Scheme Procedure} string-take-right s n Return the @var{n} last characters of @var{s}. @end deffn string-drop-right @c snarfed from srfi-13.c:601 @deffn {Scheme Procedure} string-drop-right s n Return all but the last @var{n} characters of @var{s}. @end deffn string-pad @c snarfed from srfi-13.c:616 @deffn {Scheme Procedure} string-pad s len [chr [start [end]]] Take that characters from @var{start} to @var{end} from the string @var{s} and return a new string, right-padded by the character @var{chr} to length @var{len}. If the resulting string is longer than @var{len}, it is truncated on the right. @end deffn string-pad-right @c snarfed from srfi-13.c:656 @deffn {Scheme Procedure} string-pad-right s len [chr [start [end]]] Take that characters from @var{start} to @var{end} from the string @var{s} and return a new string, left-padded by the character @var{chr} to length @var{len}. If the resulting string is longer than @var{len}, it is truncated on the left. @end deffn string-trim @c snarfed from srfi-13.c:709 @deffn {Scheme Procedure} string-trim s [char_pred [start [end]]] Trim @var{s} by skipping over all characters on the left that satisfy the parameter @var{char_pred}: @itemize @bullet @item if it is the character @var{ch}, characters equal to @var{ch} are trimmed, @item if it is a procedure @var{pred} characters that satisfy @var{pred} are trimmed, @item if it is a character set, characters in that set are trimmed. @end itemize If called without a @var{char_pred} argument, all whitespace is trimmed. @end deffn string-trim-right @c snarfed from srfi-13.c:787 @deffn {Scheme Procedure} string-trim-right s [char_pred [start [end]]] Trim @var{s} by skipping over all characters on the rightt that satisfy the parameter @var{char_pred}: @itemize @bullet @item if it is the character @var{ch}, characters equal to @var{ch} are trimmed, @item if it is a procedure @var{pred} characters that satisfy @var{pred} are trimmed, @item if it is a character sets, all characters in that set are trimmed. @end itemize If called without a @var{char_pred} argument, all whitespace is trimmed. @end deffn string-trim-both @c snarfed from srfi-13.c:865 @deffn {Scheme Procedure} string-trim-both s [char_pred [start [end]]] Trim @var{s} by skipping over all characters on both sides of the string that satisfy the parameter @var{char_pred}: @itemize @bullet @item if it is the character @var{ch}, characters equal to @var{ch} are trimmed, @item if it is a procedure @var{pred} characters that satisfy @var{pred} are trimmed, @item if it is a character set, the characters in the set are trimmed. @end itemize If called without a @var{char_pred} argument, all whitespace is trimmed. @end deffn string-fill! @c snarfed from srfi-13.c:954 @deffn {Scheme Procedure} string-fill! str chr [start [end]] Stores @var{chr} in every element of the given @var{str} and returns an unspecified value. @end deffn string-compare @c snarfed from srfi-13.c:1006 @deffn {Scheme Procedure} string-compare s1 s2 proc_lt proc_eq proc_gt [start1 [end1 [start2 [end2]]]] Apply @var{proc_lt}, @var{proc_eq}, @var{proc_gt} to the mismatch index, depending upon whether @var{s1} is less than, equal to, or greater than @var{s2}. The mismatch index is the largest index @var{i} such that for every 0 <= @var{j} < @var{i}, @var{s1}[@var{j}] = @var{s2}[@var{j}] -- that is, @var{i} is the first position that does not match. @end deffn string-compare-ci @c snarfed from srfi-13.c:1060 @deffn {Scheme Procedure} string-compare-ci s1 s2 proc_lt proc_eq proc_gt [start1 [end1 [start2 [end2]]]] Apply @var{proc_lt}, @var{proc_eq}, @var{proc_gt} to the mismatch index, depending upon whether @var{s1} is less than, equal to, or greater than @var{s2}. The mismatch index is the largest index @var{i} such that for every 0 <= @var{j} < @var{i}, @var{s1}[@var{j}] = @var{s2}[@var{j}] -- that is, @var{i} is the first position that does not match. The character comparison is done case-insensitively. @end deffn string= @c snarfed from srfi-13.c:1111 @deffn {Scheme Procedure} string= s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} and @var{s2} are not equal, a true value otherwise. @end deffn string<> @c snarfed from srfi-13.c:1150 @deffn {Scheme Procedure} string<> s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} and @var{s2} are equal, a true value otherwise. @end deffn string< @c snarfed from srfi-13.c:1193 @deffn {Scheme Procedure} string< s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} is greater or equal to @var{s2}, a true value otherwise. @end deffn string> @c snarfed from srfi-13.c:1236 @deffn {Scheme Procedure} string> s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} is less or equal to @var{s2}, a true value otherwise. @end deffn string<= @c snarfed from srfi-13.c:1279 @deffn {Scheme Procedure} string<= s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} is greater to @var{s2}, a true value otherwise. @end deffn string>= @c snarfed from srfi-13.c:1322 @deffn {Scheme Procedure} string>= s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} is less to @var{s2}, a true value otherwise. @end deffn string-ci= @c snarfed from srfi-13.c:1366 @deffn {Scheme Procedure} string-ci= s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} and @var{s2} are not equal, a true value otherwise. The character comparison is done case-insensitively. @end deffn string-ci<> @c snarfed from srfi-13.c:1410 @deffn {Scheme Procedure} string-ci<> s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} and @var{s2} are equal, a true value otherwise. The character comparison is done case-insensitively. @end deffn string-ci< @c snarfed from srfi-13.c:1454 @deffn {Scheme Procedure} string-ci< s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} is greater or equal to @var{s2}, a true value otherwise. The character comparison is done case-insensitively. @end deffn string-ci> @c snarfed from srfi-13.c:1498 @deffn {Scheme Procedure} string-ci> s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} is less or equal to @var{s2}, a true value otherwise. The character comparison is done case-insensitively. @end deffn string-ci<= @c snarfed from srfi-13.c:1542 @deffn {Scheme Procedure} string-ci<= s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} is greater to @var{s2}, a true value otherwise. The character comparison is done case-insensitively. @end deffn string-ci>= @c snarfed from srfi-13.c:1586 @deffn {Scheme Procedure} string-ci>= s1 s2 [start1 [end1 [start2 [end2]]]] Return @code{#f} if @var{s1} is less to @var{s2}, a true value otherwise. The character comparison is done case-insensitively. @end deffn string-hash @c snarfed from srfi-13.c:1631 @deffn {Scheme Procedure} string-hash s [bound [start [end]]] Compute a hash value for @var{S}. the optional argument @var{bound} is a non-negative exact integer specifying the range of the hash function. A positive value restricts the return value to the range [0,bound). @end deffn string-hash-ci @c snarfed from srfi-13.c:1648 @deffn {Scheme Procedure} string-hash-ci s [bound [start [end]]] Compute a hash value for @var{S}. the optional argument @var{bound} is a non-negative exact integer specifying the range of the hash function. A positive value restricts the return value to the range [0,bound). @end deffn string-prefix-length @c snarfed from srfi-13.c:1660 @deffn {Scheme Procedure} string-prefix-length s1 s2 [start1 [end1 [start2 [end2]]]] Return the length of the longest common prefix of the two strings. @end deffn string-prefix-length-ci @c snarfed from srfi-13.c:1692 @deffn {Scheme Procedure} string-prefix-length-ci s1 s2 [start1 [end1 [start2 [end2]]]] Return the length of the longest common prefix of the two strings, ignoring character case. @end deffn string-suffix-length @c snarfed from srfi-13.c:1724 @deffn {Scheme Procedure} string-suffix-length s1 s2 [start1 [end1 [start2 [end2]]]] Return the length of the longest common suffix of the two strings. @end deffn string-suffix-length-ci @c snarfed from srfi-13.c:1756 @deffn {Scheme Procedure} string-suffix-length-ci s1 s2 [start1 [end1 [start2 [end2]]]] Return the length of the longest common suffix of the two strings, ignoring character case. @end deffn string-prefix? @c snarfed from srfi-13.c:1787 @deffn {Scheme Procedure} string-prefix? s1 s2 [start1 [end1 [start2 [end2]]]] Is @var{s1} a prefix of @var{s2}? @end deffn string-prefix-ci? @c snarfed from srfi-13.c:1819 @deffn {Scheme Procedure} string-prefix-ci? s1 s2 [start1 [end1 [start2 [end2]]]] Is @var{s1} a prefix of @var{s2}, ignoring character case? @end deffn string-suffix? @c snarfed from srfi-13.c:1851 @deffn {Scheme Procedure} string-suffix? s1 s2 [start1 [end1 [start2 [end2]]]] Is @var{s1} a suffix of @var{s2}? @end deffn string-suffix-ci? @c snarfed from srfi-13.c:1883 @deffn {Scheme Procedure} string-suffix-ci? s1 s2 [start1 [end1 [start2 [end2]]]] Is @var{s1} a suffix of @var{s2}, ignoring character case? @end deffn string-index @c snarfed from srfi-13.c:1927 @deffn {Scheme Procedure} string-index s char_pred [start [end]] Search through the string @var{s} from left to right, returning the index of the first occurence of a character which @itemize @bullet @item equals @var{char_pred}, if it is character, @item satisifies the predicate @var{char_pred}, if it is a procedure, @item is in the set @var{char_pred}, if it is a character set. @end itemize @end deffn string-index-right @c snarfed from srfi-13.c:1994 @deffn {Scheme Procedure} string-index-right s char_pred [start [end]] Search through the string @var{s} from right to left, returning the index of the last occurence of a character which @itemize @bullet @item equals @var{char_pred}, if it is character, @item satisifies the predicate @var{char_pred}, if it is a procedure, @item is in the set if @var{char_pred} is a character set. @end itemize @end deffn string-rindex @c snarfed from srfi-13.c:2061 @deffn {Scheme Procedure} string-rindex s char_pred [start [end]] Search through the string @var{s} from right to left, returning the index of the last occurence of a character which @itemize @bullet @item equals @var{char_pred}, if it is character, @item satisifies the predicate @var{char_pred}, if it is a procedure, @item is in the set if @var{char_pred} is a character set. @end itemize @end deffn string-skip @c snarfed from srfi-13.c:2083 @deffn {Scheme Procedure} string-skip s char_pred [start [end]] Search through the string @var{s} from left to right, returning the index of the first occurence of a character which @itemize @bullet @item does not equal @var{char_pred}, if it is character, @item does not satisify the predicate @var{char_pred}, if it is a procedure, @item is not in the set if @var{char_pred} is a character set. @end itemize @end deffn string-skip-right @c snarfed from srfi-13.c:2152 @deffn {Scheme Procedure} string-skip-right s char_pred [start [end]] Search through the string @var{s} from right to left, returning the index of the last occurence of a character which @itemize @bullet @item does not equal @var{char_pred}, if it is character, @item does not satisfy the predicate @var{char_pred}, if it is a procedure, @item is not in the set if @var{char_pred} is a character set. @end itemize @end deffn string-count @c snarfed from srfi-13.c:2221 @deffn {Scheme Procedure} string-count s char_pred [start [end]] Return the count of the number of characters in the string @var{s} which @itemize @bullet @item equals @var{char_pred}, if it is character, @item satisifies the predicate @var{char_pred}, if it is a procedure. @item is in the set @var{char_pred}, if it is a character set. @end itemize @end deffn string-contains @c snarfed from srfi-13.c:2280 @deffn {Scheme Procedure} string-contains s1 s2 [start1 [end1 [start2 [end2]]]] Does string @var{s1} contain string @var{s2}? Return the index in @var{s1} where @var{s2} occurs as a substring, or false. The optional start/end indices restrict the operation to the indicated substrings. @end deffn string-contains-ci @c snarfed from srfi-13.c:2327 @deffn {Scheme Procedure} string-contains-ci s1 s2 [start1 [end1 [start2 [end2]]]] Does string @var{s1} contain string @var{s2}? Return the index in @var{s1} where @var{s2} occurs as a substring, or false. The optional start/end indices restrict the operation to the indicated substrings. Character comparison is done case-insensitively. @end deffn string-upcase! @c snarfed from srfi-13.c:2392 @deffn {Scheme Procedure} string-upcase! str [start [end]] Destructively upcase every character in @code{str}. @lisp (string-upcase! y) @result{} "ARRDEFG" y @result{} "ARRDEFG" @end lisp @end deffn string-upcase @c snarfed from srfi-13.c:2413 @deffn {Scheme Procedure} string-upcase str [start [end]] Upcase every character in @code{str}. @end deffn string-downcase! @c snarfed from srfi-13.c:2460 @deffn {Scheme Procedure} string-downcase! str [start [end]] Destructively downcase every character in @var{str}. @lisp y @result{} "ARRDEFG" (string-downcase! y) @result{} "arrdefg" y @result{} "arrdefg" @end lisp @end deffn string-downcase @c snarfed from srfi-13.c:2481 @deffn {Scheme Procedure} string-downcase str [start [end]] Downcase every character in @var{str}. @end deffn string-titlecase! @c snarfed from srfi-13.c:2537 @deffn {Scheme Procedure} string-titlecase! str [start [end]] Destructively titlecase every first character in a word in @var{str}. @end deffn string-titlecase @c snarfed from srfi-13.c:2553 @deffn {Scheme Procedure} string-titlecase str [start [end]] Titlecase every first character in a word in @var{str}. @end deffn string-capitalize! @c snarfed from srfi-13.c:2575 @deffn {Scheme Procedure} string-capitalize! str Upcase the first character of every word in @var{str} destructively and return @var{str}. @lisp y @result{} "hello world" (string-capitalize! y) @result{} "Hello World" y @result{} "Hello World" @end lisp @end deffn string-capitalize @c snarfed from srfi-13.c:2587 @deffn {Scheme Procedure} string-capitalize str Return a freshly allocated string with the characters in @var{str}, where the first character of every word is capitalized. @end deffn string-reverse @c snarfed from srfi-13.c:2621 @deffn {Scheme Procedure} string-reverse str [start [end]] Reverse the string @var{str}. The optional arguments @var{start} and @var{end} delimit the region of @var{str} to operate on. @end deffn string-reverse! @c snarfed from srfi-13.c:2646 @deffn {Scheme Procedure} string-reverse! str [start [end]] Reverse the string @var{str} in-place. The optional arguments @var{start} and @var{end} delimit the region of @var{str} to operate on. The return value is unspecified. @end deffn string-append/shared @c snarfed from srfi-13.c:2668 @deffn {Scheme Procedure} string-append/shared . rest Like @code{string-append}, but the result may share memory with the argument strings. @end deffn string-concatenate @c snarfed from srfi-13.c:2703 @deffn {Scheme Procedure} string-concatenate ls Append the elements of @var{ls} (which must be strings) together into a single string. Guaranteed to return a freshly allocated string. @end deffn string-concatenate-reverse @c snarfed from srfi-13.c:2726 @deffn {Scheme Procedure} string-concatenate-reverse ls [final_string [end]] Without optional arguments, this procedure is equivalent to @smalllisp (string-concatenate (reverse ls)) @end smalllisp If the optional argument @var{final_string} is specified, it is consed onto the beginning to @var{ls} before performing the list-reverse and string-concatenate operations. If @var{end} is given, only the characters of @var{final_string} up to index @var{end} are used. Guaranteed to return a freshly allocated string. @end deffn string-concatenate/shared @c snarfed from srfi-13.c:2743 @deffn {Scheme Procedure} string-concatenate/shared ls Like @code{string-concatenate}, but the result may share memory with the strings in the list @var{ls}. @end deffn string-concatenate-reverse/shared @c snarfed from srfi-13.c:2755 @deffn {Scheme Procedure} string-concatenate-reverse/shared ls [final_string [end]] Like @code{string-concatenate-reverse}, but the result may share memory with the the strings in the @var{ls} arguments. @end deffn string-map @c snarfed from srfi-13.c:2768 @deffn {Scheme Procedure} string-map proc s [start [end]] @var{proc} is a char->char procedure, it is mapped over @var{s}. The order in which the procedure is applied to the string elements is not specified. @end deffn string-map! @c snarfed from srfi-13.c:2799 @deffn {Scheme Procedure} string-map! proc s [start [end]] @var{proc} is a char->char procedure, it is mapped over @var{s}. The order in which the procedure is applied to the string elements is not specified. The string @var{s} is modified in-place, the return value is not specified. @end deffn string-fold @c snarfed from srfi-13.c:2827 @deffn {Scheme Procedure} string-fold kons knil s [start [end]] Fold @var{kons} over the characters of @var{s}, with @var{knil} as the terminating element, from left to right. @var{kons} must expect two arguments: The actual character and the last result of @var{kons}' application. @end deffn string-fold-right @c snarfed from srfi-13.c:2858 @deffn {Scheme Procedure} string-fold-right kons knil s [start [end]] Fold @var{kons} over the characters of @var{s}, with @var{knil} as the terminating element, from right to left. @var{kons} must expect two arguments: The actual character and the last result of @var{kons}' application. @end deffn string-unfold @c snarfed from srfi-13.c:2903 @deffn {Scheme Procedure} string-unfold p f g seed [base [make_final]] @itemize @bullet @item @var{g} is used to generate a series of @emph{seed} values from the initial @var{seed}: @var{seed}, (@var{g} @var{seed}), (@var{g}^2 @var{seed}), (@var{g}^3 @var{seed}), @dots{} @item @var{p} tells us when to stop -- when it returns true when applied to one of these seed values. @item @var{f} maps each seed value to the corresponding character in the result string. These chars are assembled into the string in a left-to-right order. @item @var{base} is the optional initial/leftmost portion of the constructed string; it default to the empty string. @item @var{make_final} is applied to the terminal seed value (on which @var{p} returns true) to produce the final/rightmost portion of the constructed string. It defaults to @code{(lambda (x) )}. @end itemize @end deffn string-unfold-right @c snarfed from srfi-13.c:2966 @deffn {Scheme Procedure} string-unfold-right p f g seed [base [make_final]] @itemize @bullet @item @var{g} is used to generate a series of @emph{seed} values from the initial @var{seed}: @var{seed}, (@var{g} @var{seed}), (@var{g}^2 @var{seed}), (@var{g}^3 @var{seed}), @dots{} @item @var{p} tells us when to stop -- when it returns true when applied to one of these seed values. @item @var{f} maps each seed value to the corresponding character in the result string. These chars are assembled into the string in a right-to-left order. @item @var{base} is the optional initial/rightmost portion of the constructed string; it default to the empty string. @item @var{make_final} is applied to the terminal seed value (on which @var{p} returns true) to produce the final/leftmost portion of the constructed string. It defaults to @code{(lambda (x) )}. @end itemize @end deffn string-for-each @c snarfed from srfi-13.c:3013 @deffn {Scheme Procedure} string-for-each proc s [start [end]] @var{proc} is mapped over @var{s} in left-to-right order. The return value is not specified. @end deffn string-for-each-index @c snarfed from srfi-13.c:3054 @deffn {Scheme Procedure} string-for-each-index proc s [start [end]] Call @code{(@var{proc} i)} for each index i in @var{s}, from left to right. For example, to change characters to alternately upper and lower case, @example (define str (string-copy "studly")) (string-for-each-index (lambda (i) (string-set! str i ((if (even? i) char-upcase char-downcase) (string-ref str i)))) str) str @result{} "StUdLy" @end example @end deffn xsubstring @c snarfed from srfi-13.c:3087 @deffn {Scheme Procedure} xsubstring s from [to [start [end]]] This is the @emph{extended substring} procedure that implements replicated copying of a substring of some string. @var{s} is a string, @var{start} and @var{end} are optional arguments that demarcate a substring of @var{s}, defaulting to 0 and the length of @var{s}. Replicate this substring up and down index space, in both the positive and negative directions. @code{xsubstring} returns the substring of this string beginning at index @var{from}, and ending at @var{to}, which defaults to @var{from} + (@var{end} - @var{start}). @end deffn string-xcopy! @c snarfed from srfi-13.c:3134 @deffn {Scheme Procedure} string-xcopy! target tstart s sfrom [sto [start [end]]] Exactly the same as @code{xsubstring}, but the extracted text is written into the string @var{target} starting at index @var{tstart}. The operation is not defined if @code{(eq? @var{target} @var{s})} or these arguments share storage -- you cannot copy a string on top of itself. @end deffn string-replace @c snarfed from srfi-13.c:3184 @deffn {Scheme Procedure} string-replace s1 s2 [start1 [end1 [start2 [end2]]]] Return the string @var{s1}, but with the characters @var{start1} @dots{} @var{end1} replaced by the characters @var{start2} @dots{} @var{end2} from @var{s2}. @end deffn string-tokenize @c snarfed from srfi-13.c:3221 @deffn {Scheme Procedure} string-tokenize s [token_set [start [end]]] Split the string @var{s} into a list of substrings, where each substring is a maximal non-empty contiguous sequence of characters from the character set @var{token_set}, which defaults to @code{char-set:graphic}. If @var{start} or @var{end} indices are provided, they restrict @code{string-tokenize} to operating on the indicated substring of @var{s}. @end deffn string-split @c snarfed from srfi-13.c:3287 @deffn {Scheme Procedure} string-split str chr Split the string @var{str} into the a list of the substrings delimited by appearances of the character @var{chr}. Note that an empty substring between separator characters will result in an empty string in the result list. @lisp (string-split "root:x:0:0:root:/root:/bin/bash" #\:) @result{} ("root" "x" "0" "0" "root" "/root" "/bin/bash") (string-split "::" #\:) @result{} ("" "" "") (string-split "" #\:) @result{} ("") @end lisp @end deffn string-filter @c snarfed from srfi-13.c:3327 @deffn {Scheme Procedure} string-filter s char_pred [start [end]] Filter the string @var{s}, retaining only those characters which satisfy @var{char_pred}. If @var{char_pred} is a procedure, it is applied to each character as a predicate, if it is a character, it is tested for equality and if it is a character set, it is tested for membership. @end deffn string-delete @c snarfed from srfi-13.c:3447 @deffn {Scheme Procedure} string-delete s char_pred [start [end]] Delete characters satisfying @var{char_pred} from @var{s}. If @var{char_pred} is a procedure, it is applied to each character as a predicate, if it is a character, it is tested for equality and if it is a character set, it is tested for membership. @end deffn char-set? @c snarfed from srfi-14.c:85 @deffn {Scheme Procedure} char-set? obj Return @code{#t} if @var{obj} is a character set, @code{#f} otherwise. @end deffn char-set= @c snarfed from srfi-14.c:95 @deffn {Scheme Procedure} char-set= . char_sets Return @code{#t} if all given character sets are equal. @end deffn char-set<= @c snarfed from srfi-14.c:125 @deffn {Scheme Procedure} char-set<= . char_sets Return @code{#t} if every character set @var{cs}i is a subset of character set @var{cs}i+1. @end deffn char-set-hash @c snarfed from srfi-14.c:163 @deffn {Scheme Procedure} char-set-hash cs [bound] Compute a hash value for the character set @var{cs}. If @var{bound} is given and non-zero, it restricts the returned value to the range 0 @dots{} @var{bound - 1}. @end deffn char-set-cursor @c snarfed from srfi-14.c:196 @deffn {Scheme Procedure} char-set-cursor cs Return a cursor into the character set @var{cs}. @end deffn char-set-ref @c snarfed from srfi-14.c:216 @deffn {Scheme Procedure} char-set-ref cs cursor Return the character at the current cursor position @var{cursor} in the character set @var{cs}. It is an error to pass a cursor for which @code{end-of-char-set?} returns true. @end deffn char-set-cursor-next @c snarfed from srfi-14.c:233 @deffn {Scheme Procedure} char-set-cursor-next cs cursor Advance the character set cursor @var{cursor} to the next character in the character set @var{cs}. It is an error if the cursor given satisfies @code{end-of-char-set?}. @end deffn end-of-char-set? @c snarfed from srfi-14.c:254 @deffn {Scheme Procedure} end-of-char-set? cursor Return @code{#t} if @var{cursor} has reached the end of a character set, @code{#f} otherwise. @end deffn char-set-fold @c snarfed from srfi-14.c:266 @deffn {Scheme Procedure} char-set-fold kons knil cs Fold the procedure @var{kons} over the character set @var{cs}, initializing it with @var{knil}. @end deffn char-set-unfold @c snarfed from srfi-14.c:296 @deffn {Scheme Procedure} char-set-unfold p f g seed [base_cs] This is a fundamental constructor for character sets. @itemize @bullet @item @var{g} is used to generate a series of ``seed'' values from the initial seed: @var{seed}, (@var{g} @var{seed}), (@var{g}^2 @var{seed}), (@var{g}^3 @var{seed}), @dots{} @item @var{p} tells us when to stop -- when it returns true when applied to one of the seed values. @item @var{f} maps each seed value to a character. These characters are added to the base character set @var{base_cs} to form the result; @var{base_cs} defaults to the empty set. @end itemize @end deffn char-set-unfold! @c snarfed from srfi-14.c:340 @deffn {Scheme Procedure} char-set-unfold! p f g seed base_cs This is a fundamental constructor for character sets. @itemize @bullet @item @var{g} is used to generate a series of ``seed'' values from the initial seed: @var{seed}, (@var{g} @var{seed}), (@var{g}^2 @var{seed}), (@var{g}^3 @var{seed}), @dots{} @item @var{p} tells us when to stop -- when it returns true when applied to one of the seed values. @item @var{f} maps each seed value to a character. These characters are added to the base character set @var{base_cs} to form the result; @var{base_cs} defaults to the empty set. @end itemize @end deffn char-set-for-each @c snarfed from srfi-14.c:369 @deffn {Scheme Procedure} char-set-for-each proc cs Apply @var{proc} to every character in the character set @var{cs}. The return value is not specified. @end deffn char-set-map @c snarfed from srfi-14.c:388 @deffn {Scheme Procedure} char-set-map proc cs Map the procedure @var{proc} over every character in @var{cs}. @var{proc} must be a character -> character procedure. @end deffn char-set-copy @c snarfed from srfi-14.c:414 @deffn {Scheme Procedure} char-set-copy cs Return a newly allocated character set containing all characters in @var{cs}. @end deffn char-set @c snarfed from srfi-14.c:434 @deffn {Scheme Procedure} char-set . rest Return a character set containing all given characters. @end deffn list->char-set @c snarfed from srfi-14.c:462 @deffn {Scheme Procedure} list->char-set list [base_cs] Convert the character list @var{list} to a character set. If the character set @var{base_cs} is given, the character in this set are also included in the result. @end deffn list->char-set! @c snarfed from srfi-14.c:496 @deffn {Scheme Procedure} list->char-set! list base_cs Convert the character list @var{list} to a character set. The characters are added to @var{base_cs} and @var{base_cs} is returned. @end deffn string->char-set @c snarfed from srfi-14.c:523 @deffn {Scheme Procedure} string->char-set str [base_cs] Convert the string @var{str} to a character set. If the character set @var{base_cs} is given, the characters in this set are also included in the result. @end deffn string->char-set! @c snarfed from srfi-14.c:557 @deffn {Scheme Procedure} string->char-set! str base_cs Convert the string @var{str} to a character set. The characters from the string are added to @var{base_cs}, and @var{base_cs} is returned. @end deffn char-set-filter @c snarfed from srfi-14.c:584 @deffn {Scheme Procedure} char-set-filter pred cs [base_cs] Return a character set containing every character from @var{cs} so that it satisfies @var{pred}. If provided, the characters from @var{base_cs} are added to the result. @end deffn char-set-filter! @c snarfed from srfi-14.c:620 @deffn {Scheme Procedure} char-set-filter! pred cs base_cs Return a character set containing every character from @var{cs} so that it satisfies @var{pred}. The characters are added to @var{base_cs} and @var{base_cs} is returned. @end deffn ucs-range->char-set @c snarfed from srfi-14.c:658 @deffn {Scheme Procedure} ucs-range->char-set lower upper [error [base_cs]] Return a character set containing all characters whose character codes lie in the half-open range [@var{lower},@var{upper}). If @var{error} is a true value, an error is signalled if the specified range contains characters which are not contained in the implemented character range. If @var{error} is @code{#f}, these characters are silently left out of the resultung character set. The characters in @var{base_cs} are added to the result, if given. @end deffn ucs-range->char-set! @c snarfed from srfi-14.c:711 @deffn {Scheme Procedure} ucs-range->char-set! lower upper error base_cs Return a character set containing all characters whose character codes lie in the half-open range [@var{lower},@var{upper}). If @var{error} is a true value, an error is signalled if the specified range contains characters which are not contained in the implemented character range. If @var{error} is @code{#f}, these characters are silently left out of the resultung character set. The characters are added to @var{base_cs} and @var{base_cs} is returned. @end deffn ->char-set @c snarfed from srfi-14.c:741 @deffn {Scheme Procedure} ->char-set x Coerces x into a char-set. @var{x} may be a string, character or char-set. A string is converted to the set of its constituent characters; a character is converted to a singleton set; a char-set is returned as-is. @end deffn char-set-size @c snarfed from srfi-14.c:757 @deffn {Scheme Procedure} char-set-size cs Return the number of elements in character set @var{cs}. @end deffn char-set-count @c snarfed from srfi-14.c:774 @deffn {Scheme Procedure} char-set-count pred cs Return the number of the elements int the character set @var{cs} which satisfy the predicate @var{pred}. @end deffn char-set->list @c snarfed from srfi-14.c:797 @deffn {Scheme Procedure} char-set->list cs Return a list containing the elements of the character set @var{cs}. @end deffn char-set->string @c snarfed from srfi-14.c:816 @deffn {Scheme Procedure} char-set->string cs Return a string containing the elements of the character set @var{cs}. The order in which the characters are placed in the string is not defined. @end deffn char-set-contains? @c snarfed from srfi-14.c:841 @deffn {Scheme Procedure} char-set-contains? cs ch Return @code{#t} iff the character @var{ch} is contained in the character set @var{cs}. @end deffn char-set-every @c snarfed from srfi-14.c:854 @deffn {Scheme Procedure} char-set-every pred cs Return a true value if every character in the character set @var{cs} satisfies the predicate @var{pred}. @end deffn char-set-any @c snarfed from srfi-14.c:878 @deffn {Scheme Procedure} char-set-any pred cs Return a true value if any character in the character set @var{cs} satisfies the predicate @var{pred}. @end deffn char-set-adjoin @c snarfed from srfi-14.c:901 @deffn {Scheme Procedure} char-set-adjoin cs . rest Add all character arguments to the first argument, which must be a character set. @end deffn char-set-delete @c snarfed from srfi-14.c:929 @deffn {Scheme Procedure} char-set-delete cs . rest Delete all character arguments from the first argument, which must be a character set. @end deffn char-set-adjoin! @c snarfed from srfi-14.c:957 @deffn {Scheme Procedure} char-set-adjoin! cs . rest Add all character arguments to the first argument, which must be a character set. @end deffn char-set-delete! @c snarfed from srfi-14.c:984 @deffn {Scheme Procedure} char-set-delete! cs . rest Delete all character arguments from the first argument, which must be a character set. @end deffn char-set-complement @c snarfed from srfi-14.c:1010 @deffn {Scheme Procedure} char-set-complement cs Return the complement of the character set @var{cs}. @end deffn char-set-union @c snarfed from srfi-14.c:1031 @deffn {Scheme Procedure} char-set-union . rest Return the union of all argument character sets. @end deffn char-set-intersection @c snarfed from srfi-14.c:1060 @deffn {Scheme Procedure} char-set-intersection . rest Return the intersection of all argument character sets. @end deffn char-set-difference @c snarfed from srfi-14.c:1100 @deffn {Scheme Procedure} char-set-difference cs1 . rest Return the difference of all argument character sets. @end deffn char-set-xor @c snarfed from srfi-14.c:1130 @deffn {Scheme Procedure} char-set-xor . rest Return the exclusive-or of all argument character sets. @end deffn char-set-diff+intersection @c snarfed from srfi-14.c:1171 @deffn {Scheme Procedure} char-set-diff+intersection cs1 . rest Return the difference and the intersection of all argument character sets. @end deffn char-set-complement! @c snarfed from srfi-14.c:1209 @deffn {Scheme Procedure} char-set-complement! cs Return the complement of the character set @var{cs}. @end deffn char-set-union! @c snarfed from srfi-14.c:1226 @deffn {Scheme Procedure} char-set-union! cs1 . rest Return the union of all argument character sets. @end deffn char-set-intersection! @c snarfed from srfi-14.c:1254 @deffn {Scheme Procedure} char-set-intersection! cs1 . rest Return the intersection of all argument character sets. @end deffn char-set-difference! @c snarfed from srfi-14.c:1282 @deffn {Scheme Procedure} char-set-difference! cs1 . rest Return the difference of all argument character sets. @end deffn char-set-xor! @c snarfed from srfi-14.c:1310 @deffn {Scheme Procedure} char-set-xor! cs1 . rest Return the exclusive-or of all argument character sets. @end deffn char-set-diff+intersection! @c snarfed from srfi-14.c:1349 @deffn {Scheme Procedure} char-set-diff+intersection! cs1 cs2 . rest Return the difference and the intersection of all argument character sets. @end deffn string=? @c snarfed from strorder.c:50 @deffn {Scheme Procedure} string=? s1 s2 Lexicographic equality predicate; return @code{#t} if the two strings are the same length and contain the same characters in the same positions, otherwise return @code{#f}. The procedure @code{string-ci=?} treats upper and lower case letters as though they were the same character, but @code{string=?} treats upper and lower case as distinct characters. @end deffn string-ci=? @c snarfed from strorder.c:62 @deffn {Scheme Procedure} string-ci=? s1 s2 Case-insensitive string equality predicate; return @code{#t} if the two strings are the same length and their component characters match (ignoring case) at each position; otherwise return @code{#f}. @end deffn string<? @c snarfed from strorder.c:72 @deffn {Scheme Procedure} string<? s1 s2 Lexicographic ordering predicate; return @code{#t} if @var{s1} is lexicographically less than @var{s2}. @end deffn string<=? @c snarfed from strorder.c:82 @deffn {Scheme Procedure} string<=? s1 s2 Lexicographic ordering predicate; return @code{#t} if @var{s1} is lexicographically less than or equal to @var{s2}. @end deffn string>? @c snarfed from strorder.c:92 @deffn {Scheme Procedure} string>? s1 s2 Lexicographic ordering predicate; return @code{#t} if @var{s1} is lexicographically greater than @var{s2}. @end deffn string>=? @c snarfed from strorder.c:102 @deffn {Scheme Procedure} string>=? s1 s2 Lexicographic ordering predicate; return @code{#t} if @var{s1} is lexicographically greater than or equal to @var{s2}. @end deffn string-ci<? @c snarfed from strorder.c:113 @deffn {Scheme Procedure} string-ci<? s1 s2 Case insensitive lexicographic ordering predicate; return @code{#t} if @var{s1} is lexicographically less than @var{s2} regardless of case. @end deffn string-ci<=? @c snarfed from strorder.c:124 @deffn {Scheme Procedure} string-ci<=? s1 s2 Case insensitive lexicographic ordering predicate; return @code{#t} if @var{s1} is lexicographically less than or equal to @var{s2} regardless of case. @end deffn string-ci>? @c snarfed from strorder.c:135 @deffn {Scheme Procedure} string-ci>? s1 s2 Case insensitive lexicographic ordering predicate; return @code{#t} if @var{s1} is lexicographically greater than @var{s2} regardless of case. @end deffn string-ci>=? @c snarfed from strorder.c:146 @deffn {Scheme Procedure} string-ci>=? s1 s2 Case insensitive lexicographic ordering predicate; return @code{#t} if @var{s1} is lexicographically greater than or equal to @var{s2} regardless of case. @end deffn object->string @c snarfed from strports.c:362 @deffn {Scheme Procedure} object->string obj [printer] Return a Scheme string obtained by printing @var{obj}. Printing function can be specified by the optional second argument @var{printer} (default: @code{write}). @end deffn call-with-output-string @c snarfed from strports.c:386 @deffn {Scheme Procedure} call-with-output-string proc Calls the one-argument procedure @var{proc} with a newly created output port. When the function returns, the string composed of the characters written into the port is returned. @end deffn call-with-input-string @c snarfed from strports.c:405 @deffn {Scheme Procedure} call-with-input-string string proc Calls the one-argument procedure @var{proc} with a newly created input port from which @var{string}'s contents may be read. The value yielded by the @var{proc} is returned. @end deffn open-input-string @c snarfed from strports.c:418 @deffn {Scheme Procedure} open-input-string str Take a string and return an input port that delivers characters from the string. The port can be closed by @code{close-input-port}, though its storage will be reclaimed by the garbage collector if it becomes inaccessible. @end deffn open-output-string @c snarfed from strports.c:432 @deffn {Scheme Procedure} open-output-string Return an output port that will accumulate characters for retrieval by @code{get-output-string}. The port can be closed by the procedure @code{close-output-port}, though its storage will be reclaimed by the garbage collector if it becomes inaccessible. @end deffn get-output-string @c snarfed from strports.c:449 @deffn {Scheme Procedure} get-output-string port Given an output port created by @code{open-output-string}, return a string consisting of the characters that have been output to the port so far. @end deffn eval-string @c snarfed from strports.c:518 @deffn {Scheme Procedure} eval-string string [module] Evaluate @var{string} as the text representation of a Scheme form or forms, and return whatever value they produce. Evaluation takes place in the given module, or the current module when no module is given. While the code is evaluated, the given module is made the current one. The current module is restored when this procedure returns. @end deffn make-struct-layout @c snarfed from struct.c:58 @deffn {Scheme Procedure} make-struct-layout fields Return a new structure layout object. @var{fields} must be a string made up of pairs of characters strung together. The first character of each pair describes a field type, the second a field protection. Allowed types are 'p' for GC-protected Scheme data, 'u' for unprotected binary data, and 's' for a field that points to the structure itself. Allowed protections are 'w' for mutable fields, 'r' for read-only fields, and 'o' for opaque fields. The last field protection specification may be capitalized to indicate that the field is a tail-array. @end deffn struct? @c snarfed from struct.c:225 @deffn {Scheme Procedure} struct? x Return @code{#t} iff @var{x} is a structure object, else @code{#f}. @end deffn struct-vtable? @c snarfed from struct.c:234 @deffn {Scheme Procedure} struct-vtable? x Return @code{#t} iff @var{x} is a vtable structure. @end deffn make-struct @c snarfed from struct.c:418 @deffn {Scheme Procedure} make-struct vtable tail_array_size . init Create a new structure. @var{type} must be a vtable structure (@pxref{Vtables}). @var{tail-elts} must be a non-negative integer. If the layout specification indicated by @var{type} includes a tail-array, this is the number of elements allocated to that array. The @var{init1}, @dots{} are optional arguments describing how successive fields of the structure should be initialized. Only fields with protection 'r' or 'w' can be initialized, except for fields of type 's', which are automatically initialized to point to the new structure itself; fields with protection 'o' can not be initialized by Scheme programs. If fewer optional arguments than initializable fields are supplied, fields of type 'p' get default value #f while fields of type 'u' are initialized to 0. Structs are currently the basic representation for record-like data structures in Guile. The plan is to eventually replace them with a new representation which will at the same time be easier to use and more powerful. For more information, see the documentation for @code{make-vtable-vtable}. @end deffn make-vtable-vtable @c snarfed from struct.c:502 @deffn {Scheme Procedure} make-vtable-vtable user_fields tail_array_size . init Return a new, self-describing vtable structure. @var{user-fields} is a string describing user defined fields of the vtable beginning at index @code{vtable-offset-user} (see @code{make-struct-layout}). @var{tail-size} specifies the size of the tail-array (if any) of this vtable. @var{init1}, @dots{} are the optional initializers for the fields of the vtable. Vtables have one initializable system field---the struct printer. This field comes before the user fields in the initializers passed to @code{make-vtable-vtable} and @code{make-struct}, and thus works as a third optional argument to @code{make-vtable-vtable} and a fourth to @code{make-struct} when creating vtables: If the value is a procedure, it will be called instead of the standard printer whenever a struct described by this vtable is printed. The procedure will be called with arguments STRUCT and PORT. The structure of a struct is described by a vtable, so the vtable is in essence the type of the struct. The vtable is itself a struct with a vtable. This could go on forever if it weren't for the vtable-vtables which are self-describing vtables, and thus terminate the chain. There are several potential ways of using structs, but the standard one is to use three kinds of structs, together building up a type sub-system: one vtable-vtable working as the root and one or several "types", each with a set of "instances". (The vtable-vtable should be compared to the class <class> which is the class of itself.) @lisp (define ball-root (make-vtable-vtable "pr" 0)) (define (make-ball-type ball-color) (make-struct ball-root 0 (make-struct-layout "pw") (lambda (ball port) (format port "#<a ~A ball owned by ~A>" (color ball) (owner ball))) ball-color)) (define (color ball) (struct-ref (struct-vtable ball) vtable-offset-user)) (define (owner ball) (struct-ref ball 0)) (define red (make-ball-type 'red)) (define green (make-ball-type 'green)) (define (make-ball type owner) (make-struct type 0 owner)) (define ball (make-ball green 'Nisse)) ball @result{} #<a green ball owned by Nisse> @end lisp @end deffn struct-ref @c snarfed from struct.c:585 @deffn {Scheme Procedure} struct-ref handle pos @deffnx {Scheme Procedure} struct-set! struct n value Access (or modify) the @var{n}th field of @var{struct}. If the field is of type 'p', then it can be set to an arbitrary value. If the field is of type 'u', then it can only be set to a non-negative integer value small enough to fit in one machine word. @end deffn struct-set! @c snarfed from struct.c:664 @deffn {Scheme Procedure} struct-set! handle pos val Set the slot of the structure @var{handle} with index @var{pos} to @var{val}. Signal an error if the slot can not be written to. @end deffn struct-vtable @c snarfed from struct.c:735 @deffn {Scheme Procedure} struct-vtable handle Return the vtable structure that describes the type of @var{struct}. @end deffn struct-vtable-tag @c snarfed from struct.c:746 @deffn {Scheme Procedure} struct-vtable-tag handle Return the vtable tag of the structure @var{handle}. @end deffn struct-vtable-name @c snarfed from struct.c:785 @deffn {Scheme Procedure} struct-vtable-name vtable Return the name of the vtable @var{vtable}. @end deffn set-struct-vtable-name! @c snarfed from struct.c:795 @deffn {Scheme Procedure} set-struct-vtable-name! vtable name Set the name of the vtable @var{vtable} to @var{name}. @end deffn symbol? @c snarfed from symbols.c:193 @deffn {Scheme Procedure} symbol? obj Return @code{#t} if @var{obj} is a symbol, otherwise return @code{#f}. @end deffn symbol-interned? @c snarfed from symbols.c:203 @deffn {Scheme Procedure} symbol-interned? symbol Return @code{#t} if @var{symbol} is interned, otherwise return @code{#f}. @end deffn make-symbol @c snarfed from symbols.c:215 @deffn {Scheme Procedure} make-symbol name Return a new uninterned symbol with the name @var{name}. The returned symbol is guaranteed to be unique and future calls to @code{string->symbol} will not return it. @end deffn symbol->string @c snarfed from symbols.c:247 @deffn {Scheme Procedure} symbol->string s Return the name of @var{symbol} as a string. If the symbol was part of an object returned as the value of a literal expression (section @pxref{Literal expressions,,,r5rs, The Revised^5 Report on Scheme}) or by a call to the @code{read} procedure, and its name contains alphabetic characters, then the string returned will contain characters in the implementation's preferred standard case---some implementations will prefer upper case, others lower case. If the symbol was returned by @code{string->symbol}, the case of characters in the string returned will be the same as the case in the string that was passed to @code{string->symbol}. It is an error to apply mutation procedures like @code{string-set!} to strings returned by this procedure. The following examples assume that the implementation's standard case is lower case: @lisp (symbol->string 'flying-fish) @result{} "flying-fish" (symbol->string 'Martin) @result{} "martin" (symbol->string (string->symbol "Malvina")) @result{} "Malvina" @end lisp @end deffn string->symbol @c snarfed from symbols.c:277 @deffn {Scheme Procedure} string->symbol string Return the symbol whose name is @var{string}. This procedure can create symbols with names containing special characters or letters in the non-standard case, but it is usually a bad idea to create such symbols because in some implementations of Scheme they cannot be read as themselves. See @code{symbol->string}. The following examples assume that the implementation's standard case is lower case: @lisp (eq? 'mISSISSIppi 'mississippi) @result{} #t (string->symbol "mISSISSIppi") @result{} @r{the symbol with name "mISSISSIppi"} (eq? 'bitBlt (string->symbol "bitBlt")) @result{} #f (eq? 'JollyWog (string->symbol (symbol->string 'JollyWog))) @result{} #t (string=? "K. Harper, M.D." (symbol->string (string->symbol "K. Harper, M.D."))) @result{}#t @end lisp @end deffn string-ci->symbol @c snarfed from symbols.c:289 @deffn {Scheme Procedure} string-ci->symbol str Return the symbol whose name is @var{str}. @var{str} is converted to lowercase before the conversion is done, if Guile is currently reading symbols case-insensitively. @end deffn gensym @c snarfed from symbols.c:306 @deffn {Scheme Procedure} gensym [prefix] Create a new symbol with a name constructed from a prefix and a counter value. The string @var{prefix} can be specified as an optional argument. Default prefix is @code{ g}. The counter is increased by 1 at each call. There is no provision for resetting the counter. @end deffn symbol-hash @c snarfed from symbols.c:332 @deffn {Scheme Procedure} symbol-hash symbol Return a hash value for @var{symbol}. @end deffn symbol-fref @c snarfed from symbols.c:342 @deffn {Scheme Procedure} symbol-fref s Return the contents of @var{symbol}'s @dfn{function slot}. @end deffn symbol-pref @c snarfed from symbols.c:353 @deffn {Scheme Procedure} symbol-pref s Return the @dfn{property list} currently associated with @var{symbol}. @end deffn symbol-fset! @c snarfed from symbols.c:364 @deffn {Scheme Procedure} symbol-fset! s val Change the binding of @var{symbol}'s function slot. @end deffn symbol-pset! @c snarfed from symbols.c:376 @deffn {Scheme Procedure} symbol-pset! s val Change the binding of @var{symbol}'s property slot. @end deffn call-with-new-thread @c snarfed from threads.c:719 @deffn {Scheme Procedure} call-with-new-thread thunk [handler] Call @code{thunk} in a new thread and with a new dynamic state, returning a new thread object representing the thread. The procedure @var{thunk} is called via @code{with-continuation-barrier}. When @var{handler} is specified, then @var{thunk} is called from within a @code{catch} with tag @code{#t} that has @var{handler} as its handler. This catch is established inside the continuation barrier. Once @var{thunk} or @var{handler} returns, the return value is made the @emph{exit value} of the thread and the thread is terminated. @end deffn yield @c snarfed from threads.c:830 @deffn {Scheme Procedure} yield Move the calling thread to the end of the scheduling queue. @end deffn join-thread @c snarfed from threads.c:840 @deffn {Scheme Procedure} join-thread thread Suspend execution of the calling thread until the target @var{thread} terminates, unless the target @var{thread} has already terminated. @end deffn make-mutex @c snarfed from threads.c:936 @deffn {Scheme Procedure} make-mutex Create a new mutex. @end deffn make-recursive-mutex @c snarfed from threads.c:945 @deffn {Scheme Procedure} make-recursive-mutex Create a new recursive mutex. @end deffn lock-mutex @c snarfed from threads.c:991 @deffn {Scheme Procedure} lock-mutex mx Lock @var{mutex}. If the mutex is already locked, the calling thread blocks until the mutex becomes available. The function returns when the calling thread owns the lock on @var{mutex}. Locking a mutex that a thread already owns will succeed right away and will not block the thread. That is, Guile's mutexes are @emph{recursive}. @end deffn try-mutex @c snarfed from threads.c:1039 @deffn {Scheme Procedure} try-mutex mutex Try to lock @var{mutex}. If the mutex is already locked by someone else, return @code{#f}. Else lock the mutex and return @code{#t}. @end deffn unlock-mutex @c snarfed from threads.c:1084 @deffn {Scheme Procedure} unlock-mutex mx Unlocks @var{mutex} if the calling thread owns the lock on @var{mutex}. Calling unlock-mutex on a mutex not owned by the current thread results in undefined behaviour. Once a mutex has been unlocked, one thread blocked on @var{mutex} is awakened and grabs the mutex lock. Every call to @code{lock-mutex} by this thread must be matched with a call to @code{unlock-mutex}. Only the last call to @code{unlock-mutex} will actually unlock the mutex. @end deffn make-condition-variable @c snarfed from threads.c:1160 @deffn {Scheme Procedure} make-condition-variable Make a new condition variable. @end deffn wait-condition-variable @c snarfed from threads.c:1228 @deffn {Scheme Procedure} wait-condition-variable cv mx [t] Wait until @var{cond-var} has been signalled. While waiting, @var{mutex} is atomically unlocked (as with @code{unlock-mutex}) and is locked again when this function returns. When @var{time} is given, it specifies a point in time where the waiting should be aborted. It can be either a integer as returned by @code{current-time} or a pair as returned by @code{gettimeofday}. When the waiting is aborted the mutex is locked and @code{#f} is returned. When the condition variable is in fact signalled, the mutex is also locked and @code{#t} is returned. @end deffn signal-condition-variable @c snarfed from threads.c:1265 @deffn {Scheme Procedure} signal-condition-variable cv Wake up one thread that is waiting for @var{cv} @end deffn broadcast-condition-variable @c snarfed from threads.c:1285 @deffn {Scheme Procedure} broadcast-condition-variable cv Wake up all threads that are waiting for @var{cv}. @end deffn current-thread @c snarfed from threads.c:1462 @deffn {Scheme Procedure} current-thread Return the thread that called this function. @end deffn all-threads @c snarfed from threads.c:1480 @deffn {Scheme Procedure} all-threads Return a list of all threads. @end deffn thread-exited? @c snarfed from threads.c:1506 @deffn {Scheme Procedure} thread-exited? thread Return @code{#t} iff @var{thread} has exited. @end deffn catch @c snarfed from throw.c:571 @deffn {Scheme Procedure} catch key thunk handler [pre_unwind_handler] Invoke @var{thunk} in the dynamic context of @var{handler} for exceptions matching @var{key}. If thunk throws to the symbol @var{key}, then @var{handler} is invoked this way: @lisp (handler key args ...) @end lisp @var{key} is a symbol or @code{#t}. @var{thunk} takes no arguments. If @var{thunk} returns normally, that is the return value of @code{catch}. Handler is invoked outside the scope of its own @code{catch}. If @var{handler} again throws to the same key, a new handler from further up the call chain is invoked. If the key is @code{#t}, then a throw to @emph{any} symbol will match this call to @code{catch}. If a @var{pre-unwind-handler} is given and @var{thunk} throws an exception that matches @var{key}, Guile calls the @var{pre-unwind-handler} before unwinding the dynamic state and invoking the main @var{handler}. @var{pre-unwind-handler} should be a procedure with the same signature as @var{handler}, that is @code{(lambda (key . args))}. It is typically used to save the stack at the point where the exception occurred, but can also query other parts of the dynamic state at that point, such as fluid values. A @var{pre-unwind-handler} can exit either normally or non-locally. If it exits normally, Guile unwinds the stack and dynamic context and then calls the normal (third argument) handler. If it exits non-locally, that exit determines the continuation. @end deffn with-throw-handler @c snarfed from throw.c:609 @deffn {Scheme Procedure} with-throw-handler key thunk handler Add @var{handler} to the dynamic context as a throw handler for key @var{key}, then invoke @var{thunk}. @end deffn lazy-catch @c snarfed from throw.c:640 @deffn {Scheme Procedure} lazy-catch key thunk handler This behaves exactly like @code{catch}, except that it does not unwind the stack before invoking @var{handler}. If the @var{handler} procedure returns normally, Guile rethrows the same exception again to the next innermost catch, lazy-catch or throw handler. If the @var{handler} exits non-locally, that exit determines the continuation. @end deffn throw @c snarfed from throw.c:679 @deffn {Scheme Procedure} throw key . args Invoke the catch form matching @var{key}, passing @var{args} to the @var{handler}. @var{key} is a symbol. It will match catches of the same symbol or of @code{#t}. If there is no handler at all, Guile prints an error and then exits. @end deffn values @c snarfed from values.c:53 @deffn {Scheme Procedure} values . args Delivers all of its arguments to its continuation. Except for continuations created by the @code{call-with-values} procedure, all continuations take exactly one value. The effect of passing no value or more than one value to continuations that were not created by @code{call-with-values} is unspecified. @end deffn make-variable @c snarfed from variable.c:52 @deffn {Scheme Procedure} make-variable init Return a variable initialized to value @var{init}. @end deffn make-undefined-variable @c snarfed from variable.c:62 @deffn {Scheme Procedure} make-undefined-variable Return a variable that is initially unbound. @end deffn variable? @c snarfed from variable.c:73 @deffn {Scheme Procedure} variable? obj Return @code{#t} iff @var{obj} is a variable object, else return @code{#f}. @end deffn variable-ref @c snarfed from variable.c:85 @deffn {Scheme Procedure} variable-ref var Dereference @var{var} and return its value. @var{var} must be a variable object; see @code{make-variable} and @code{make-undefined-variable}. @end deffn variable-set! @c snarfed from variable.c:101 @deffn {Scheme Procedure} variable-set! var val Set the value of the variable @var{var} to @var{val}. @var{var} must be a variable object, @var{val} can be any value. Return an unspecified value. @end deffn variable-bound? @c snarfed from variable.c:113 @deffn {Scheme Procedure} variable-bound? var Return @code{#t} iff @var{var} is bound to a value. Throws an error if @var{var} is not a variable object. @end deffn vector? @c snarfed from vectors.c:91 @deffn {Scheme Procedure} vector? obj Return @code{#t} if @var{obj} is a vector, otherwise return @code{#f}. @end deffn list->vector @c snarfed from vectors.c:123 @deffn {Scheme Procedure} list->vector implemented by the C function "scm_vector" @end deffn vector @c snarfed from vectors.c:140 @deffn {Scheme Procedure} vector . l @deffnx {Scheme Procedure} list->vector l Return a newly allocated vector composed of the given arguments. Analogous to @code{list}. @lisp (vector 'a 'b 'c) @result{} #(a b c) @end lisp @end deffn make-vector @c snarfed from vectors.c:276 @deffn {Scheme Procedure} make-vector k [fill] Return a newly allocated vector of @var{k} elements. If a second argument is given, then each position is initialized to @var{fill}. Otherwise the initial contents of each position is unspecified. @end deffn vector-copy @c snarfed from vectors.c:318 @deffn {Scheme Procedure} vector-copy vec Return a copy of @var{vec}. @end deffn vector->list @c snarfed from vectors.c:389 @deffn {Scheme Procedure} vector->list v Return a newly allocated list composed of the elements of @var{v}. @lisp (vector->list '#(dah dah didah)) @result{} (dah dah didah) (list->vector '(dididit dah)) @result{} #(dididit dah) @end lisp @end deffn vector-fill! @c snarfed from vectors.c:413 @deffn {Scheme Procedure} vector-fill! v fill Store @var{fill} in every position of @var{vector}. The value returned by @code{vector-fill!} is unspecified. @end deffn vector-move-left! @c snarfed from vectors.c:450 @deffn {Scheme Procedure} vector-move-left! vec1 start1 end1 vec2 start2 Copy elements from @var{vec1}, positions @var{start1} to @var{end1}, to @var{vec2} starting at position @var{start2}. @var{start1} and @var{start2} are inclusive indices; @var{end1} is exclusive. @code{vector-move-left!} copies elements in leftmost order. Therefore, in the case where @var{vec1} and @var{vec2} refer to the same vector, @code{vector-move-left!} is usually appropriate when @var{start1} is greater than @var{start2}. @end deffn vector-move-right! @c snarfed from vectors.c:488 @deffn {Scheme Procedure} vector-move-right! vec1 start1 end1 vec2 start2 Copy elements from @var{vec1}, positions @var{start1} to @var{end1}, to @var{vec2} starting at position @var{start2}. @var{start1} and @var{start2} are inclusive indices; @var{end1} is exclusive. @code{vector-move-right!} copies elements in rightmost order. Therefore, in the case where @var{vec1} and @var{vec2} refer to the same vector, @code{vector-move-right!} is usually appropriate when @var{start1} is less than @var{start2}. @end deffn generalized-vector? @c snarfed from vectors.c:537 @deffn {Scheme Procedure} generalized-vector? obj Return @code{#t} if @var{obj} is a vector, string, bitvector, or uniform numeric vector. @end deffn generalized-vector-length @c snarfed from vectors.c:569 @deffn {Scheme Procedure} generalized-vector-length v Return the length of the generalized vector @var{v}. @end deffn generalized-vector-ref @c snarfed from vectors.c:594 @deffn {Scheme Procedure} generalized-vector-ref v idx Return the element at index @var{idx} of the generalized vector @var{v}. @end deffn generalized-vector-set! @c snarfed from vectors.c:619 @deffn {Scheme Procedure} generalized-vector-set! v idx val Set the element at index @var{idx} of the generalized vector @var{v} to @var{val}. @end deffn generalized-vector->list @c snarfed from vectors.c:630 @deffn {Scheme Procedure} generalized-vector->list v Return a new list whose elements are the elements of the generalized vector @var{v}. @end deffn major-version @c snarfed from version.c:35 @deffn {Scheme Procedure} major-version Return a string containing Guile's major version number. E.g., the 1 in "1.6.5". @end deffn minor-version @c snarfed from version.c:48 @deffn {Scheme Procedure} minor-version Return a string containing Guile's minor version number. E.g., the 6 in "1.6.5". @end deffn micro-version @c snarfed from version.c:61 @deffn {Scheme Procedure} micro-version Return a string containing Guile's micro version number. E.g., the 5 in "1.6.5". @end deffn version @c snarfed from version.c:83 @deffn {Scheme Procedure} version @deffnx {Scheme Procedure} major-version @deffnx {Scheme Procedure} minor-version @deffnx {Scheme Procedure} micro-version Return a string describing Guile's version number, or its major, minor or micro version number, respectively. @lisp (version) @result{} "1.6.0" (major-version) @result{} "1" (minor-version) @result{} "6" (micro-version) @result{} "0" @end lisp @end deffn effective-version @c snarfed from version.c:113 @deffn {Scheme Procedure} effective-version Return a string describing Guile's effective version number. @lisp (version) @result{} "1.6.0" (effective-version) @result{} "1.6" (major-version) @result{} "1" (minor-version) @result{} "6" (micro-version) @result{} "0" @end lisp @end deffn make-soft-port @c snarfed from vports.c:185 @deffn {Scheme Procedure} make-soft-port pv modes Return a port capable of receiving or delivering characters as specified by the @var{modes} string (@pxref{File Ports, open-file}). @var{pv} must be a vector of length 5 or 6. Its components are as follows: @enumerate 0 @item procedure accepting one character for output @item procedure accepting a string for output @item thunk for flushing output @item thunk for getting one character @item thunk for closing port (not by garbage collection) @item (if present and not @code{#f}) thunk for computing the number of characters that can be read from the port without blocking. @end enumerate For an output-only port only elements 0, 1, 2, and 4 need be procedures. For an input-only port only elements 3 and 4 need be procedures. Thunks 2 and 4 can instead be @code{#f} if there is no useful operation for them to perform. If thunk 3 returns @code{#f} or an @code{eof-object} (@pxref{Input, eof-object?, ,r5rs, The Revised^5 Report on Scheme}) it indicates that the port has reached end-of-file. For example: @lisp (define stdout (current-output-port)) (define p (make-soft-port (vector (lambda (c) (write c stdout)) (lambda (s) (display s stdout)) (lambda () (display "." stdout)) (lambda () (char-upcase (read-char))) (lambda () (display "@@" stdout))) "rw")) (write p p) @result{} #<input-output: soft 8081e20> @end lisp @end deffn make-weak-vector @c snarfed from weaks.c:76 @deffn {Scheme Procedure} make-weak-vector size [fill] Return a weak vector with @var{size} elements. If the optional argument @var{fill} is given, all entries in the vector will be set to @var{fill}. The default value for @var{fill} is the empty list. @end deffn list->weak-vector @c snarfed from weaks.c:84 @deffn {Scheme Procedure} list->weak-vector implemented by the C function "scm_weak_vector" @end deffn weak-vector @c snarfed from weaks.c:92 @deffn {Scheme Procedure} weak-vector . l @deffnx {Scheme Procedure} list->weak-vector l Construct a weak vector from a list: @code{weak-vector} uses the list of its arguments while @code{list->weak-vector} uses its only argument @var{l} (a list) to construct a weak vector the same way @code{list->vector} would. @end deffn weak-vector? @c snarfed from weaks.c:122 @deffn {Scheme Procedure} weak-vector? obj Return @code{#t} if @var{obj} is a weak vector. Note that all weak hashes are also weak vectors. @end deffn make-weak-key-alist-vector @c snarfed from weaks.c:140 @deffn {Scheme Procedure} make-weak-key-alist-vector [size] @deffnx {Scheme Procedure} make-weak-value-alist-vector size @deffnx {Scheme Procedure} make-doubly-weak-alist-vector size Return a weak hash table with @var{size} buckets. As with any hash table, choosing a good size for the table requires some caution. You can modify weak hash tables in exactly the same way you would modify regular hash tables. (@pxref{Hash Tables}) @end deffn make-weak-value-alist-vector @c snarfed from weaks.c:152 @deffn {Scheme Procedure} make-weak-value-alist-vector [size] Return a hash table with weak values with @var{size} buckets. (@pxref{Hash Tables}) @end deffn make-doubly-weak-alist-vector @c snarfed from weaks.c:164 @deffn {Scheme Procedure} make-doubly-weak-alist-vector size Return a hash table with weak keys and values with @var{size} buckets. (@pxref{Hash Tables}) @end deffn weak-key-alist-vector? @c snarfed from weaks.c:179 @deffn {Scheme Procedure} weak-key-alist-vector? obj @deffnx {Scheme Procedure} weak-value-alist-vector? obj @deffnx {Scheme Procedure} doubly-weak-alist-vector? obj Return @code{#t} if @var{obj} is the specified weak hash table. Note that a doubly weak hash table is neither a weak key nor a weak value hash table. @end deffn weak-value-alist-vector? @c snarfed from weaks.c:189 @deffn {Scheme Procedure} weak-value-alist-vector? obj Return @code{#t} if @var{obj} is a weak value hash table. @end deffn doubly-weak-alist-vector? @c snarfed from weaks.c:199 @deffn {Scheme Procedure} doubly-weak-alist-vector? obj Return @code{#t} if @var{obj} is a doubly weak hash table. @end deffn array-fill! @c snarfed from ramap.c:352 @deffn {Scheme Procedure} array-fill! ra fill Store @var{fill} in every element of @var{array}. The value returned is unspecified. @end deffn array-copy-in-order! @c snarfed from ramap.c:399 @deffn {Scheme Procedure} array-copy-in-order! implemented by the C function "scm_array_copy_x" @end deffn array-copy! @c snarfed from ramap.c:408 @deffn {Scheme Procedure} array-copy! src dst @deffnx {Scheme Procedure} array-copy-in-order! src dst Copy every element from vector or array @var{source} to the corresponding element of @var{destination}. @var{destination} must have the same rank as @var{source}, and be at least as large in each dimension. The order is unspecified. @end deffn array-map-in-order! @c snarfed from ramap.c:814 @deffn {Scheme Procedure} array-map-in-order! implemented by the C function "scm_array_map_x" @end deffn array-map! @c snarfed from ramap.c:826 @deffn {Scheme Procedure} array-map! ra0 proc . lra @deffnx {Scheme Procedure} array-map-in-order! ra0 proc . lra @var{array1}, @dots{} must have the same number of dimensions as @var{array0} and have a range for each index which includes the range for the corresponding index in @var{array0}. @var{proc} is applied to each tuple of elements of @var{array1} @dots{} and the result is stored as the corresponding element in @var{array0}. The value returned is unspecified. The order of application is unspecified. @end deffn array-for-each @c snarfed from ramap.c:972 @deffn {Scheme Procedure} array-for-each proc ra0 . lra Apply @var{proc} to each tuple of elements of @var{array0} @dots{} in row-major order. The value returned is unspecified. @end deffn array-index-map! @c snarfed from ramap.c:1000 @deffn {Scheme Procedure} array-index-map! ra proc Apply @var{proc} to the indices of each element of @var{array} in turn, storing the result in the corresponding element. The value returned and the order of application are unspecified. One can implement @var{array-indexes} as @lisp (define (array-indexes array) (let ((ra (apply make-array #f (array-shape array)))) (array-index-map! ra (lambda x x)) ra)) @end lisp Another example: @lisp (define (apl:index-generator n) (let ((v (make-uniform-vector n 1))) (array-index-map! v (lambda (i) i)) v)) @end lisp @end deffn array? @c snarfed from unif.c:501 @deffn {Scheme Procedure} array? obj [prot] Return @code{#t} if the @var{obj} is an array, and @code{#f} if not. @end deffn typed-array? @c snarfed from unif.c:548 @deffn {Scheme Procedure} typed-array? obj type Return @code{#t} if the @var{obj} is an array of type @var{type}, and @code{#f} if not. @end deffn array-rank @c snarfed from unif.c:569 @deffn {Scheme Procedure} array-rank array Return the number of dimensions of the array @var{array.} @end deffn array-dimensions @c snarfed from unif.c:583 @deffn {Scheme Procedure} array-dimensions ra @code{array-dimensions} is similar to @code{array-shape} but replaces elements with a @code{0} minimum with one greater than the maximum. So: @lisp (array-dimensions (make-array 'foo '(-1 3) 5)) @result{} ((-1 3) 5) @end lisp @end deffn shared-array-root @c snarfed from unif.c:611 @deffn {Scheme Procedure} shared-array-root ra Return the root vector of a shared array. @end deffn shared-array-offset @c snarfed from unif.c:625 @deffn {Scheme Procedure} shared-array-offset ra Return the root vector index of the first element in the array. @end deffn shared-array-increments @c snarfed from unif.c:641 @deffn {Scheme Procedure} shared-array-increments ra For each dimension, return the distance between elements in the root vector. @end deffn make-typed-array @c snarfed from unif.c:740 @deffn {Scheme Procedure} make-typed-array type fill . bounds Create and return an array of type @var{type}. @end deffn make-array @c snarfed from unif.c:775 @deffn {Scheme Procedure} make-array fill . bounds Create and return an array. @end deffn dimensions->uniform-array @c snarfed from unif.c:790 @deffn {Scheme Procedure} dimensions->uniform-array dims prot [fill] @deffnx {Scheme Procedure} make-uniform-vector length prototype [fill] Create and return a uniform array or vector of type corresponding to @var{prototype} with dimensions @var{dims} or length @var{length}. If @var{fill} is supplied, it's used to fill the array, otherwise @var{prototype} is used. @end deffn make-shared-array @c snarfed from unif.c:855 @deffn {Scheme Procedure} make-shared-array oldra mapfunc . dims @code{make-shared-array} can be used to create shared subarrays of other arrays. The @var{mapper} is a function that translates coordinates in the new array into coordinates in the old array. A @var{mapper} must be linear, and its range must stay within the bounds of the old array, but it can be otherwise arbitrary. A simple example: @lisp (define fred (make-array #f 8 8)) (define freds-diagonal (make-shared-array fred (lambda (i) (list i i)) 8)) (array-set! freds-diagonal 'foo 3) (array-ref fred 3 3) @result{} foo (define freds-center (make-shared-array fred (lambda (i j) (list (+ 3 i) (+ 3 j))) 2 2)) (array-ref freds-center 0 0) @result{} foo @end lisp @end deffn transpose-array @c snarfed from unif.c:973 @deffn {Scheme Procedure} transpose-array ra . args Return an array sharing contents with @var{array}, but with dimensions arranged in a different order. There must be one @var{dim} argument for each dimension of @var{array}. @var{dim0}, @var{dim1}, @dots{} should be integers between 0 and the rank of the array to be returned. Each integer in that range must appear at least once in the argument list. The values of @var{dim0}, @var{dim1}, @dots{} correspond to dimensions in the array to be returned, their positions in the argument list to dimensions of @var{array}. Several @var{dim}s may have the same value, in which case the returned array will have smaller rank than @var{array}. @lisp (transpose-array '#2((a b) (c d)) 1 0) @result{} #2((a c) (b d)) (transpose-array '#2((a b) (c d)) 0 0) @result{} #1(a d) (transpose-array '#3(((a b c) (d e f)) ((1 2 3) (4 5 6))) 1 1 0) @result{} #2((a 4) (b 5) (c 6)) @end lisp @end deffn enclose-array @c snarfed from unif.c:1071 @deffn {Scheme Procedure} enclose-array ra . axes @var{dim0}, @var{dim1} @dots{} should be nonnegative integers less than the rank of @var{array}. @var{enclose-array} returns an array resembling an array of shared arrays. The dimensions of each shared array are the same as the @var{dim}th dimensions of the original array, the dimensions of the outer array are the same as those of the original array that did not match a @var{dim}. An enclosed array is not a general Scheme array. Its elements may not be set using @code{array-set!}. Two references to the same element of an enclosed array will be @code{equal?} but will not in general be @code{eq?}. The value returned by @var{array-prototype} when given an enclosed array is unspecified. examples: @lisp (enclose-array '#3(((a b c) (d e f)) ((1 2 3) (4 5 6))) 1) @result{} #<enclosed-array (#1(a d) #1(b e) #1(c f)) (#1(1 4) #1(2 5) #1(3 6))> (enclose-array '#3(((a b c) (d e f)) ((1 2 3) (4 5 6))) 1 0) @result{} #<enclosed-array #2((a 1) (d 4)) #2((b 2) (e 5)) #2((c 3) (f 6))> @end lisp @end deffn array-in-bounds? @c snarfed from unif.c:1144 @deffn {Scheme Procedure} array-in-bounds? v . args Return @code{#t} if its arguments would be acceptable to @code{array-ref}. @end deffn array-ref @c snarfed from unif.c:1225 @deffn {Scheme Procedure} array-ref v . args Return the element at the @code{(index1, index2)} element in @var{array}. @end deffn array-set! @c snarfed from unif.c:1242 @deffn {Scheme Procedure} array-set! v obj . args Set the element at the @code{(index1, index2)} element in @var{array} to @var{new-value}. The value returned by array-set! is unspecified. @end deffn array-contents @c snarfed from unif.c:1268 @deffn {Scheme Procedure} array-contents ra [strict] If @var{array} may be @dfn{unrolled} into a one dimensional shared array without changing their order (last subscript changing fastest), then @code{array-contents} returns that shared array, otherwise it returns @code{#f}. All arrays made by @var{make-array} and @var{make-uniform-array} may be unrolled, some arrays made by @var{make-shared-array} may not be. If the optional argument @var{strict} is provided, a shared array will be returned only if its elements are stored internally contiguous in memory. @end deffn uniform-array-read! @c snarfed from unif.c:1368 @deffn {Scheme Procedure} uniform-array-read! ura [port_or_fd [start [end]]] @deffnx {Scheme Procedure} uniform-vector-read! uve [port-or-fdes] [start] [end] Attempt to read all elements of @var{ura}, in lexicographic order, as binary objects from @var{port-or-fdes}. If an end of file is encountered, the objects up to that point are put into @var{ura} (starting at the beginning) and the remainder of the array is unchanged. The optional arguments @var{start} and @var{end} allow a specified region of a vector (or linearized array) to be read, leaving the remainder of the vector unchanged. @code{uniform-array-read!} returns the number of objects read. @var{port-or-fdes} may be omitted, in which case it defaults to the value returned by @code{(current-input-port)}. @end deffn uniform-array-write @c snarfed from unif.c:1422 @deffn {Scheme Procedure} uniform-array-write ura [port_or_fd [start [end]]] Writes all elements of @var{ura} as binary objects to @var{port-or-fdes}. The optional arguments @var{start} and @var{end} allow a specified region of a vector (or linearized array) to be written. The number of objects actually written is returned. @var{port-or-fdes} may be omitted, in which case it defaults to the value returned by @code{(current-output-port)}. @end deffn bitvector? @c snarfed from unif.c:1534 @deffn {Scheme Procedure} bitvector? obj Return @code{#t} when @var{obj} is a bitvector, else return @code{#f}. @end deffn make-bitvector @c snarfed from unif.c:1561 @deffn {Scheme Procedure} make-bitvector len [fill] Create a new bitvector of length @var{len} and optionally initialize all elements to @var{fill}. @end deffn bitvector @c snarfed from unif.c:1570 @deffn {Scheme Procedure} bitvector . bits Create a new bitvector with the arguments as elements. @end deffn bitvector-length @c snarfed from unif.c:1586 @deffn {Scheme Procedure} bitvector-length vec Return the length of the bitvector @var{vec}. @end deffn bitvector-ref @c snarfed from unif.c:1677 @deffn {Scheme Procedure} bitvector-ref vec idx Return the element at index @var{idx} of the bitvector @var{vec}. @end deffn bitvector-set! @c snarfed from unif.c:1720 @deffn {Scheme Procedure} bitvector-set! vec idx val Set the element at index @var{idx} of the bitvector @var{vec} when @var{val} is true, else clear it. @end deffn bitvector-fill! @c snarfed from unif.c:1731 @deffn {Scheme Procedure} bitvector-fill! vec val Set all elements of the bitvector @var{vec} when @var{val} is true, else clear them. @end deffn list->bitvector @c snarfed from unif.c:1776 @deffn {Scheme Procedure} list->bitvector list Return a new bitvector initialized with the elements of @var{list}. @end deffn bitvector->list @c snarfed from unif.c:1806 @deffn {Scheme Procedure} bitvector->list vec Return a new list initialized with the elements of the bitvector @var{vec}. @end deffn bit-count @c snarfed from unif.c:1870 @deffn {Scheme Procedure} bit-count b bitvector Return the number of occurrences of the boolean @var{b} in @var{bitvector}. @end deffn bit-position @c snarfed from unif.c:1939 @deffn {Scheme Procedure} bit-position item v k Return the index of the first occurrance of @var{item} in bit vector @var{v}, starting from @var{k}. If there is no @var{item} entry between @var{k} and the end of @var{bitvector}, then return @code{#f}. For example, @example (bit-position #t #*000101 0) @result{} 3 (bit-position #f #*0001111 3) @result{} #f @end example @end deffn bit-set*! @c snarfed from unif.c:2022 @deffn {Scheme Procedure} bit-set*! v kv obj Set entries of bit vector @var{v} to @var{obj}, with @var{kv} selecting the entries to change. The return value is unspecified. If @var{kv} is a bit vector, then those entries where it has @code{#t} are the ones in @var{v} which are set to @var{obj}. @var{kv} and @var{v} must be the same length. When @var{obj} is @code{#t} it's like @var{kv} is OR'ed into @var{v}. Or when @var{obj} is @code{#f} it can be seen as an ANDNOT. @example (define bv #*01000010) (bit-set*! bv #*10010001 #t) bv @result{} #*11010011 @end example If @var{kv} is a u32vector, then its elements are indices into @var{v} which are set to @var{obj}. @example (define bv #*01000010) (bit-set*! bv #u32(5 2 7) #t) bv @result{} #*01100111 @end example @end deffn bit-count* @c snarfed from unif.c:2125 @deffn {Scheme Procedure} bit-count* v kv obj Return a count of how many entries in bit vector @var{v} are equal to @var{obj}, with @var{kv} selecting the entries to consider. If @var{kv} is a bit vector, then those entries where it has @code{#t} are the ones in @var{v} which are considered. @var{kv} and @var{v} must be the same length. If @var{kv} is a u32vector, then it contains the indexes in @var{v} to consider. For example, @example (bit-count* #*01110111 #*11001101 #t) @result{} 3 (bit-count* #*01110111 #u32(7 0 4) #f) @result{} 2 @end example @end deffn bit-invert! @c snarfed from unif.c:2212 @deffn {Scheme Procedure} bit-invert! v Modify the bit vector @var{v} by replacing each element with its negation. @end deffn array->list @c snarfed from unif.c:2319 @deffn {Scheme Procedure} array->list v Return a list consisting of all the elements, in order, of @var{array}. @end deffn list->typed-array @c snarfed from unif.c:2348 @deffn {Scheme Procedure} list->typed-array type shape lst Return an array of the type @var{type} with elements the same as those of @var{lst}. The argument @var{shape} determines the number of dimensions of the array and their shape. It is either an exact integer, giving the number of dimensions directly, or a list whose length specifies the number of dimensions and each element specified the lower and optionally the upper bound of the corresponding dimension. When the element is list of two elements, these elements give the lower and upper bounds. When it is an exact integer, it gives only the lower bound. @end deffn list->array @c snarfed from unif.c:2406 @deffn {Scheme Procedure} list->array ndim lst Return an array with elements the same as those of @var{lst}. @end deffn list->uniform-array @c snarfed from unif.c:2456 @deffn {Scheme Procedure} list->uniform-array ndim prot lst Return a uniform array of the type indicated by prototype @var{prot} with elements the same as those of @var{lst}. Elements must be of the appropriate type, no coercions are done. The argument @var{ndim} determines the number of dimensions of the array. It is either an exact integer, giving the number directly, or a list of exact integers, whose length specifies the number of dimensions and each element is the lower index bound of its dimension. @end deffn array-type @c snarfed from unif.c:2805 @deffn {Scheme Procedure} array-type ra @end deffn array-prototype @c snarfed from unif.c:2825 @deffn {Scheme Procedure} array-prototype ra Return an object that would produce an array of the same type as @var{array}, if used as the @var{prototype} for @code{make-uniform-array}. @end deffn dynamic-link @c snarfed from dynl.c:150 @deffn {Scheme Procedure} dynamic-link filename Find the shared object (shared library) denoted by @var{filename} and link it into the running Guile application. The returned scheme object is a ``handle'' for the library which can be passed to @code{dynamic-func}, @code{dynamic-call} etc. Searching for object files is system dependent. Normally, if @var{filename} does have an explicit directory it will be searched for in locations such as @file{/usr/lib} and @file{/usr/local/lib}. @end deffn dynamic-object? @c snarfed from dynl.c:169 @deffn {Scheme Procedure} dynamic-object? obj Return @code{#t} if @var{obj} is a dynamic object handle, or @code{#f} otherwise. @end deffn dynamic-unlink @c snarfed from dynl.c:183 @deffn {Scheme Procedure} dynamic-unlink dobj Unlink a dynamic object from the application, if possible. The object must have been linked by @code{dynamic-link}, with @var{dobj} the corresponding handle. After this procedure is called, the handle can no longer be used to access the object. @end deffn dynamic-func @c snarfed from dynl.c:208 @deffn {Scheme Procedure} dynamic-func name dobj Return a ``handle'' for the function @var{name} in the shared object referred to by @var{dobj}. The handle can be passed to @code{dynamic-call} to actually call the function. Regardless whether your C compiler prepends an underscore @samp{_} to the global names in a program, you should @strong{not} include this underscore in @var{name} since it will be added automatically when necessary. @end deffn dynamic-call @c snarfed from dynl.c:254 @deffn {Scheme Procedure} dynamic-call func dobj Call a C function in a dynamic object. Two styles of invocation are supported: @itemize @bullet @item @var{func} can be a function handle returned by @code{dynamic-func}. In this case @var{dobj} is ignored @item @var{func} can be a string with the name of the function to call, with @var{dobj} the handle of the dynamic object in which to find the function. This is equivalent to @smallexample (dynamic-call (dynamic-func @var{func} @var{dobj}) #f) @end smallexample @end itemize In either case, the function is passed no arguments and its return value is ignored. @end deffn dynamic-args-call @c snarfed from dynl.c:286 @deffn {Scheme Procedure} dynamic-args-call func dobj args Call the C function indicated by @var{func} and @var{dobj}, just like @code{dynamic-call}, but pass it some arguments and return its return value. The C function is expected to take two arguments and return an @code{int}, just like @code{main}: @smallexample int c_func (int argc, char **argv); @end smallexample The parameter @var{args} must be a list of strings and is converted into an array of @code{char *}. The array is passed in @var{argv} and its size in @var{argc}. The return value is converted to a Scheme number and returned from the call to @code{dynamic-args-call}. @end deffn chown @c snarfed from filesys.c:254 @deffn {Scheme Procedure} chown object owner group Change the ownership and group of the file referred to by @var{object} to the integer values @var{owner} and @var{group}. @var{object} can be a string containing a file name or, if the platform supports fchown, a port or integer file descriptor which is open on the file. The return value is unspecified. If @var{object} is a symbolic link, either the ownership of the link or the ownership of the referenced file will be changed depending on the operating system (lchown is unsupported at present). If @var{owner} or @var{group} is specified as @code{-1}, then that ID is not changed. @end deffn chmod @c snarfed from filesys.c:292 @deffn {Scheme Procedure} chmod object mode Changes the permissions of the file referred to by @var{obj}. @var{obj} can be a string containing a file name or a port or integer file descriptor which is open on a file (in which case @code{fchmod} is used as the underlying system call). @var{mode} specifies the new permissions as a decimal number, e.g., @code{(chmod "foo" #o755)}. The return value is unspecified. @end deffn umask @c snarfed from filesys.c:324 @deffn {Scheme Procedure} umask [mode] If @var{mode} is omitted, returns a decimal number representing the current file creation mask. Otherwise the file creation mask is set to @var{mode} and the previous value is returned. E.g., @code{(umask #o022)} sets the mask to octal 22, decimal 18. @end deffn open-fdes @c snarfed from filesys.c:346 @deffn {Scheme Procedure} open-fdes path flags [mode] Similar to @code{open} but return a file descriptor instead of a port. @end deffn open @c snarfed from filesys.c:387 @deffn {Scheme Procedure} open path flags [mode] Open the file named by @var{path} for reading and/or writing. @var{flags} is an integer specifying how the file should be opened. @var{mode} is an integer specifying the permission bits of the file, if it needs to be created, before the umask is applied. The default is 666 (Unix itself has no default). @var{flags} can be constructed by combining variables using @code{logior}. Basic flags are: @defvar O_RDONLY Open the file read-only. @end defvar @defvar O_WRONLY Open the file write-only. @end defvar @defvar O_RDWR Open the file read/write. @end defvar @defvar O_APPEND Append to the file instead of truncating. @end defvar @defvar O_CREAT Create the file if it does not already exist. @end defvar See the Unix documentation of the @code{open} system call for additional flags. @end deffn close @c snarfed from filesys.c:425 @deffn {Scheme Procedure} close fd_or_port Similar to close-port (@pxref{Closing, close-port}), but also works on file descriptors. A side effect of closing a file descriptor is that any ports using that file descriptor are moved to a different file descriptor and have their revealed counts set to zero. @end deffn close-fdes @c snarfed from filesys.c:452 @deffn {Scheme Procedure} close-fdes fd A simple wrapper for the @code{close} system call. Close file descriptor @var{fd}, which must be an integer. Unlike close (@pxref{Ports and File Descriptors, close}), the file descriptor will be closed even if a port is using it. The return value is unspecified. @end deffn stat @c snarfed from filesys.c:655 @deffn {Scheme Procedure} stat object Return an object containing various information about the file determined by @var{obj}. @var{obj} can be a string containing a file name or a port or integer file descriptor which is open on a file (in which case @code{fstat} is used as the underlying system call). The object returned by @code{stat} can be passed as a single parameter to the following procedures, all of which return integers: @table @code @item stat:dev The device containing the file. @item stat:ino The file serial number, which distinguishes this file from all other files on the same device. @item stat:mode The mode of the file. This includes file type information and the file permission bits. See @code{stat:type} and @code{stat:perms} below. @item stat:nlink The number of hard links to the file. @item stat:uid The user ID of the file's owner. @item stat:gid The group ID of the file. @item stat:rdev Device ID; this entry is defined only for character or block special files. @item stat:size The size of a regular file in bytes. @item stat:atime The last access time for the file. @item stat:mtime The last modification time for the file. @item stat:ctime The last modification time for the attributes of the file. @item stat:blksize The optimal block size for reading or writing the file, in bytes. @item stat:blocks The amount of disk space that the file occupies measured in units of 512 byte blocks. @end table In addition, the following procedures return the information from stat:mode in a more convenient form: @table @code @item stat:type A symbol representing the type of file. Possible values are regular, directory, symlink, block-special, char-special, fifo, socket and unknown @item stat:perms An integer representing the access permission bits. @end table @end deffn link @c snarfed from filesys.c:717 @deffn {Scheme Procedure} link oldpath newpath Creates a new name @var{newpath} in the file system for the file named by @var{oldpath}. If @var{oldpath} is a symbolic link, the link may or may not be followed depending on the system. @end deffn rename-file @c snarfed from filesys.c:755 @deffn {Scheme Procedure} rename-file oldname newname Renames the file specified by @var{oldname} to @var{newname}. The return value is unspecified. @end deffn delete-file @c snarfed from filesys.c:772 @deffn {Scheme Procedure} delete-file str Deletes (or "unlinks") the file specified by @var{path}. @end deffn mkdir @c snarfed from filesys.c:789 @deffn {Scheme Procedure} mkdir path [mode] Create a new directory named by @var{path}. If @var{mode} is omitted then the permissions of the directory file are set using the current umask. Otherwise they are set to the decimal value specified with @var{mode}. The return value is unspecified. @end deffn rmdir @c snarfed from filesys.c:816 @deffn {Scheme Procedure} rmdir path Remove the existing directory named by @var{path}. The directory must be empty for this to succeed. The return value is unspecified. @end deffn directory-stream? @c snarfed from filesys.c:840 @deffn {Scheme Procedure} directory-stream? obj Return a boolean indicating whether @var{object} is a directory stream as returned by @code{opendir}. @end deffn opendir @c snarfed from filesys.c:851 @deffn {Scheme Procedure} opendir dirname Open the directory specified by @var{path} and return a directory stream. @end deffn readdir @c snarfed from filesys.c:873 @deffn {Scheme Procedure} readdir port Return (as a string) the next directory entry from the directory stream @var{stream}. If there is no remaining entry to be read then the end of file object is returned. @end deffn rewinddir @c snarfed from filesys.c:950 @deffn {Scheme Procedure} rewinddir port Reset the directory port @var{stream} so that the next call to @code{readdir} will return the first directory entry. @end deffn closedir @c snarfed from filesys.c:967 @deffn {Scheme Procedure} closedir port Close the directory stream @var{stream}. The return value is unspecified. @end deffn chdir @c snarfed from filesys.c:1017 @deffn {Scheme Procedure} chdir str Change the current working directory to @var{path}. The return value is unspecified. @end deffn getcwd @c snarfed from filesys.c:1032 @deffn {Scheme Procedure} getcwd Return the name of the current working directory. @end deffn select @c snarfed from filesys.c:1234 @deffn {Scheme Procedure} select reads writes excepts [secs [usecs]] This procedure has a variety of uses: waiting for the ability to provide input, accept output, or the existence of exceptional conditions on a collection of ports or file descriptors, or waiting for a timeout to occur. It also returns if interrupted by a signal. @var{reads}, @var{writes} and @var{excepts} can be lists or vectors, with each member a port or a file descriptor. The value returned is a list of three corresponding lists or vectors containing only the members which meet the specified requirement. The ability of port buffers to provide input or accept output is taken into account. Ordering of the input lists or vectors is not preserved. The optional arguments @var{secs} and @var{usecs} specify the timeout. Either @var{secs} can be specified alone, as either an integer or a real number, or both @var{secs} and @var{usecs} can be specified as integers, in which case @var{usecs} is an additional timeout expressed in microseconds. If @var{secs} is omitted or is @code{#f} then select will wait for as long as it takes for one of the other conditions to be satisfied. The scsh version of @code{select} differs as follows: Only vectors are accepted for the first three arguments. The @var{usecs} argument is not supported. Multiple values are returned instead of a list. Duplicates in the input vectors appear only once in output. An additional @code{select!} interface is provided. @end deffn fcntl @c snarfed from filesys.c:1372 @deffn {Scheme Procedure} fcntl object cmd [value] Apply @var{command} to the specified file descriptor or the underlying file descriptor of the specified port. @var{value} is an optional integer argument. Values for @var{command} are: @table @code @item F_DUPFD Duplicate a file descriptor @item F_GETFD Get flags associated with the file descriptor. @item F_SETFD Set flags associated with the file descriptor to @var{value}. @item F_GETFL Get flags associated with the open file. @item F_SETFL Set flags associated with the open file to @var{value} @item F_GETOWN Get the process ID of a socket's owner, for @code{SIGIO} signals. @item F_SETOWN Set the process that owns a socket to @var{value}, for @code{SIGIO} signals. @item FD_CLOEXEC The value used to indicate the "close on exec" flag with @code{F_GETFL} or @code{F_SETFL}. @end table @end deffn fsync @c snarfed from filesys.c:1404 @deffn {Scheme Procedure} fsync object Copies any unwritten data for the specified output file descriptor to disk. If @var{port/fd} is a port, its buffer is flushed before the underlying file descriptor is fsync'd. The return value is unspecified. @end deffn symlink @c snarfed from filesys.c:1429 @deffn {Scheme Procedure} symlink oldpath newpath Create a symbolic link named @var{path-to} with the value (i.e., pointing to) @var{path-from}. The return value is unspecified. @end deffn readlink @c snarfed from filesys.c:1448 @deffn {Scheme Procedure} readlink path Return the value of the symbolic link named by @var{path} (a string), i.e., the file that the link points to. @end deffn lstat @c snarfed from filesys.c:1490 @deffn {Scheme Procedure} lstat str Similar to @code{stat}, but does not follow symbolic links, i.e., it will return information about a symbolic link itself, not the file it points to. @var{path} must be a string. @end deffn copy-file @c snarfed from filesys.c:1513 @deffn {Scheme Procedure} copy-file oldfile newfile Copy the file specified by @var{path-from} to @var{path-to}. The return value is unspecified. @end deffn dirname @c snarfed from filesys.c:1576 @deffn {Scheme Procedure} dirname filename Return the directory name component of the file name @var{filename}. If @var{filename} does not contain a directory component, @code{.} is returned. @end deffn basename @c snarfed from filesys.c:1619 @deffn {Scheme Procedure} basename filename [suffix] Return the base name of the file name @var{filename}. The base name is the file name without any directory components. If @var{suffix} is provided, and is equal to the end of @var{basename}, it is removed also. @end deffn pipe @c snarfed from posix.c:239 @deffn {Scheme Procedure} pipe Return a newly created pipe: a pair of ports which are linked together on the local machine. The @emph{car} is the input port and the @emph{cdr} is the output port. Data written (and flushed) to the output port can be read from the input port. Pipes are commonly used for communication with a newly forked child process. The need to flush the output port can be avoided by making it unbuffered using @code{setvbuf}. Writes occur atomically provided the size of the data in bytes is not greater than the value of @code{PIPE_BUF}. Note that the output port is likely to block if too much data (typically equal to @code{PIPE_BUF}) has been written but not yet read from the input port. @end deffn getgroups @c snarfed from posix.c:260 @deffn {Scheme Procedure} getgroups Return a vector of integers representing the current supplementary group IDs. @end deffn setgroups @c snarfed from posix.c:293 @deffn {Scheme Procedure} setgroups group_vec Set the current set of supplementary group IDs to the integers in the given vector @var{vec}. The return value is unspecified. Generally only the superuser can set the process group IDs. @end deffn getpw @c snarfed from posix.c:342 @deffn {Scheme Procedure} getpw [user] Look up an entry in the user database. @var{obj} can be an integer, a string, or omitted, giving the behaviour of getpwuid, getpwnam or getpwent respectively. @end deffn setpw @c snarfed from posix.c:392 @deffn {Scheme Procedure} setpw [arg] If called with a true argument, initialize or reset the password data stream. Otherwise, close the stream. The @code{setpwent} and @code{endpwent} procedures are implemented on top of this. @end deffn getgr @c snarfed from posix.c:411 @deffn {Scheme Procedure} getgr [name] Look up an entry in the group database. @var{obj} can be an integer, a string, or omitted, giving the behaviour of getgrgid, getgrnam or getgrent respectively. @end deffn setgr @c snarfed from posix.c:447 @deffn {Scheme Procedure} setgr [arg] If called with a true argument, initialize or reset the group data stream. Otherwise, close the stream. The @code{setgrent} and @code{endgrent} procedures are implemented on top of this. @end deffn kill @c snarfed from posix.c:483 @deffn {Scheme Procedure} kill pid sig Sends a signal to the specified process or group of processes. @var{pid} specifies the processes to which the signal is sent: @table @r @item @var{pid} greater than 0 The process whose identifier is @var{pid}. @item @var{pid} equal to 0 All processes in the current process group. @item @var{pid} less than -1 The process group whose identifier is -@var{pid} @item @var{pid} equal to -1 If the process is privileged, all processes except for some special system processes. Otherwise, all processes with the current effective user ID. @end table @var{sig} should be specified using a variable corresponding to the Unix symbolic name, e.g., @defvar SIGHUP Hang-up signal. @end defvar @defvar SIGINT Interrupt signal. @end defvar @end deffn waitpid @c snarfed from posix.c:534 @deffn {Scheme Procedure} waitpid pid [options] This procedure collects status information from a child process which has terminated or (optionally) stopped. Normally it will suspend the calling process until this can be done. If more than one child process is eligible then one will be chosen by the operating system. The value of @var{pid} determines the behaviour: @table @r @item @var{pid} greater than 0 Request status information from the specified child process. @item @var{pid} equal to -1 or WAIT_ANY Request status information for any child process. @item @var{pid} equal to 0 or WAIT_MYPGRP Request status information for any child process in the current process group. @item @var{pid} less than -1 Request status information for any child process whose process group ID is -@var{PID}. @end table The @var{options} argument, if supplied, should be the bitwise OR of the values of zero or more of the following variables: @defvar WNOHANG Return immediately even if there are no child processes to be collected. @end defvar @defvar WUNTRACED Report status information for stopped processes as well as terminated processes. @end defvar The return value is a pair containing: @enumerate @item The process ID of the child process, or 0 if @code{WNOHANG} was specified and no process was collected. @item The integer status value. @end enumerate @end deffn status:exit-val @c snarfed from posix.c:560 @deffn {Scheme Procedure} status:exit-val status Return the exit status value, as would be set if a process ended normally through a call to @code{exit} or @code{_exit}, if any, otherwise @code{#f}. @end deffn status:term-sig @c snarfed from posix.c:578 @deffn {Scheme Procedure} status:term-sig status Return the signal number which terminated the process, if any, otherwise @code{#f}. @end deffn status:stop-sig @c snarfed from posix.c:594 @deffn {Scheme Procedure} status:stop-sig status Return the signal number which stopped the process, if any, otherwise @code{#f}. @end deffn getppid @c snarfed from posix.c:612 @deffn {Scheme Procedure} getppid Return an integer representing the process ID of the parent process. @end deffn getuid @c snarfed from posix.c:624 @deffn {Scheme Procedure} getuid Return an integer representing the current real user ID. @end deffn getgid @c snarfed from posix.c:635 @deffn {Scheme Procedure} getgid Return an integer representing the current real group ID. @end deffn geteuid @c snarfed from posix.c:649 @deffn {Scheme Procedure} geteuid Return an integer representing the current effective user ID. If the system does not support effective IDs, then the real ID is returned. @code{(provided? 'EIDs)} reports whether the system supports effective IDs. @end deffn getegid @c snarfed from posix.c:666 @deffn {Scheme Procedure} getegid Return an integer representing the current effective group ID. If the system does not support effective IDs, then the real ID is returned. @code{(provided? 'EIDs)} reports whether the system supports effective IDs. @end deffn setuid @c snarfed from posix.c:682 @deffn {Scheme Procedure} setuid id Sets both the real and effective user IDs to the integer @var{id}, provided the process has appropriate privileges. The return value is unspecified. @end deffn setgid @c snarfed from posix.c:695 @deffn {Scheme Procedure} setgid id Sets both the real and effective group IDs to the integer @var{id}, provided the process has appropriate privileges. The return value is unspecified. @end deffn seteuid @c snarfed from posix.c:710 @deffn {Scheme Procedure} seteuid id Sets the effective user ID to the integer @var{id}, provided the process has appropriate privileges. If effective IDs are not supported, the real ID is set instead -- @code{(provided? 'EIDs)} reports whether the system supports effective IDs. The return value is unspecified. @end deffn setegid @c snarfed from posix.c:735 @deffn {Scheme Procedure} setegid id Sets the effective group ID to the integer @var{id}, provided the process has appropriate privileges. If effective IDs are not supported, the real ID is set instead -- @code{(provided? 'EIDs)} reports whether the system supports effective IDs. The return value is unspecified. @end deffn getpgrp @c snarfed from posix.c:758 @deffn {Scheme Procedure} getpgrp Return an integer representing the current process group ID. This is the POSIX definition, not BSD. @end deffn setpgid @c snarfed from posix.c:776 @deffn {Scheme Procedure} setpgid pid pgid Move the process @var{pid} into the process group @var{pgid}. @var{pid} or @var{pgid} must be integers: they can be zero to indicate the ID of the current process. Fails on systems that do not support job control. The return value is unspecified. @end deffn setsid @c snarfed from posix.c:793 @deffn {Scheme Procedure} setsid Creates a new session. The current process becomes the session leader and is put in a new process group. The process will be detached from its controlling terminal if it has one. The return value is an integer representing the new process group ID. @end deffn ttyname @c snarfed from posix.c:817 @deffn {Scheme Procedure} ttyname port Return a string with the name of the serial terminal device underlying @var{port}. @end deffn ctermid @c snarfed from posix.c:856 @deffn {Scheme Procedure} ctermid Return a string containing the file name of the controlling terminal for the current process. @end deffn tcgetpgrp @c snarfed from posix.c:880 @deffn {Scheme Procedure} tcgetpgrp port Return the process group ID of the foreground process group associated with the terminal open on the file descriptor underlying @var{port}. If there is no foreground process group, the return value is a number greater than 1 that does not match the process group ID of any existing process group. This can happen if all of the processes in the job that was formerly the foreground job have terminated, and no other job has yet been moved into the foreground. @end deffn tcsetpgrp @c snarfed from posix.c:904 @deffn {Scheme Procedure} tcsetpgrp port pgid Set the foreground process group ID for the terminal used by the file descriptor underlying @var{port} to the integer @var{pgid}. The calling process must be a member of the same session as @var{pgid} and must have the same controlling terminal. The return value is unspecified. @end deffn execl @c snarfed from posix.c:936 @deffn {Scheme Procedure} execl filename . args Executes the file named by @var{path} as a new process image. The remaining arguments are supplied to the process; from a C program they are accessible as the @code{argv} argument to @code{main}. Conventionally the first @var{arg} is the same as @var{path}. All arguments must be strings. If @var{arg} is missing, @var{path} is executed with a null argument list, which may have system-dependent side-effects. This procedure is currently implemented using the @code{execv} system call, but we call it @code{execl} because of its Scheme calling interface. @end deffn execlp @c snarfed from posix.c:967 @deffn {Scheme Procedure} execlp filename . args Similar to @code{execl}, however if @var{filename} does not contain a slash then the file to execute will be located by searching the directories listed in the @code{PATH} environment variable. This procedure is currently implemented using the @code{execvp} system call, but we call it @code{execlp} because of its Scheme calling interface. @end deffn execle @c snarfed from posix.c:1001 @deffn {Scheme Procedure} execle filename env . args Similar to @code{execl}, but the environment of the new process is specified by @var{env}, which must be a list of strings as returned by the @code{environ} procedure. This procedure is currently implemented using the @code{execve} system call, but we call it @code{execle} because of its Scheme calling interface. @end deffn primitive-fork @c snarfed from posix.c:1037 @deffn {Scheme Procedure} primitive-fork Creates a new "child" process by duplicating the current "parent" process. In the child the return value is 0. In the parent the return value is the integer process ID of the child. This procedure has been renamed from @code{fork} to avoid a naming conflict with the scsh fork. @end deffn uname @c snarfed from posix.c:1057 @deffn {Scheme Procedure} uname Return an object with some information about the computer system the program is running on. @end deffn environ @c snarfed from posix.c:1086 @deffn {Scheme Procedure} environ [env] If @var{env} is omitted, return the current environment (in the Unix sense) as a list of strings. Otherwise set the current environment, which is also the default environment for child processes, to the supplied list of strings. Each member of @var{env} should be of the form @code{NAME=VALUE} and values of @code{NAME} should not be duplicated. If @var{env} is supplied then the return value is unspecified. @end deffn tmpnam @c snarfed from posix.c:1119 @deffn {Scheme Procedure} tmpnam Return a name in the file system that does not match any existing file. However there is no guarantee that another process will not create the file after @code{tmpnam} is called. Care should be taken if opening the file, e.g., use the @code{O_EXCL} open flag or use @code{mkstemp!} instead. @end deffn mkstemp! @c snarfed from posix.c:1159 @deffn {Scheme Procedure} mkstemp! tmpl Create a new unique file in the file system and return a new buffered port open for reading and writing to the file. @var{tmpl} is a string specifying where the file should be created: it must end with @samp{XXXXXX} and those @samp{X}s will be changed in the string to return the name of the file. (@code{port-filename} on the port also gives the name.) POSIX doesn't specify the permissions mode of the file, on GNU and most systems it's @code{#o600}. An application can use @code{chmod} to relax that if desired. For example @code{#o666} less @code{umask}, which is usual for ordinary file creation, @example (let ((port (mkstemp! (string-copy "/tmp/myfile-XXXXXX")))) (chmod port (logand #o666 (lognot (umask)))) ...) @end example @end deffn utime @c snarfed from posix.c:1194 @deffn {Scheme Procedure} utime pathname [actime [modtime]] @code{utime} sets the access and modification times for the file named by @var{path}. If @var{actime} or @var{modtime} is not supplied, then the current time is used. @var{actime} and @var{modtime} must be integer time values as returned by the @code{current-time} procedure. @lisp (utime "foo" (- (current-time) 3600)) @end lisp will set the access time to one hour in the past and the modification time to the current time. @end deffn access? @c snarfed from posix.c:1259 @deffn {Scheme Procedure} access? path how Test accessibility of a file under the real UID and GID of the calling process. The return is @code{#t} if @var{path} exists and the permissions requested by @var{how} are all allowed, or @code{#f} if not. @var{how} is an integer which is one of the following values, or a bitwise-OR (@code{logior}) of multiple values. @defvar R_OK Test for read permission. @end defvar @defvar W_OK Test for write permission. @end defvar @defvar X_OK Test for execute permission. @end defvar @defvar F_OK Test for existence of the file. This is implied by each of the other tests, so there's no need to combine it with them. @end defvar It's important to note that @code{access?} does not simply indicate what will happen on attempting to read or write a file. In normal circumstances it does, but in a set-UID or set-GID program it doesn't because @code{access?} tests the real ID, whereas an open or execute attempt uses the effective ID. A program which will never run set-UID/GID can ignore the difference between real and effective IDs, but for maximum generality, especially in library functions, it's best not to use @code{access?} to predict the result of an open or execute, instead simply attempt that and catch any exception. The main use for @code{access?} is to let a set-UID/GID program determine what the invoking user would have been allowed to do, without the greater (or perhaps lesser) privileges afforded by the effective ID. For more on this, see ``Testing File Access'' in The GNU C Library Reference Manual. @end deffn getpid @c snarfed from posix.c:1272 @deffn {Scheme Procedure} getpid Return an integer representing the current process ID. @end deffn putenv @c snarfed from posix.c:1289 @deffn {Scheme Procedure} putenv str Modifies the environment of the current process, which is also the default environment inherited by child processes. If @var{string} is of the form @code{NAME=VALUE} then it will be written directly into the environment, replacing any existing environment string with name matching @code{NAME}. If @var{string} does not contain an equal sign, then any existing string with name matching @var{string} will be removed. The return value is unspecified. @end deffn setlocale @c snarfed from posix.c:1373 @deffn {Scheme Procedure} setlocale category [locale] If @var{locale} is omitted, return the current value of the specified locale category as a system-dependent string. @var{category} should be specified using the values @code{LC_COLLATE}, @code{LC_ALL} etc. Otherwise the specified locale category is set to the string @var{locale} and the new value is returned as a system-dependent string. If @var{locale} is an empty string, the locale will be set using environment variables. @end deffn mknod @c snarfed from posix.c:1422 @deffn {Scheme Procedure} mknod path type perms dev Creates a new special file, such as a file corresponding to a device. @var{path} specifies the name of the file. @var{type} should be one of the following symbols: regular, directory, symlink, block-special, char-special, fifo, or socket. @var{perms} (an integer) specifies the file permissions. @var{dev} (an integer) specifies which device the special file refers to. Its exact interpretation depends on the kind of special file being created. E.g., @lisp (mknod "/dev/fd0" 'block-special #o660 (+ (* 2 256) 2)) @end lisp The return value is unspecified. @end deffn nice @c snarfed from posix.c:1471 @deffn {Scheme Procedure} nice incr Increment the priority of the current process by @var{incr}. A higher priority value means that the process runs less often. The return value is unspecified. @end deffn sync @c snarfed from posix.c:1489 @deffn {Scheme Procedure} sync Flush the operating system disk buffers. The return value is unspecified. @end deffn crypt @c snarfed from posix.c:1520 @deffn {Scheme Procedure} crypt key salt Encrypt @var{key} using @var{salt} as the salt value to the crypt(3) library call. @end deffn chroot @c snarfed from posix.c:1549 @deffn {Scheme Procedure} chroot path Change the root directory to that specified in @var{path}. This directory will be used for path names beginning with @file{/}. The root directory is inherited by all children of the current process. Only the superuser may change the root directory. @end deffn getlogin @c snarfed from posix.c:1583 @deffn {Scheme Procedure} getlogin Return a string containing the name of the user logged in on the controlling terminal of the process, or @code{#f} if this information cannot be obtained. @end deffn cuserid @c snarfed from posix.c:1601 @deffn {Scheme Procedure} cuserid Return a string containing a user name associated with the effective user id of the process. Return @code{#f} if this information cannot be obtained. @end deffn getpriority @c snarfed from posix.c:1627 @deffn {Scheme Procedure} getpriority which who Return the scheduling priority of the process, process group or user, as indicated by @var{which} and @var{who}. @var{which} is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP} or @code{PRIO_USER}, and @var{who} is interpreted relative to @var{which} (a process identifier for @code{PRIO_PROCESS}, process group identifier for @code{PRIO_PGRP}, and a user identifier for @code{PRIO_USER}. A zero value of @var{who} denotes the current process, process group, or user. Return the highest priority (lowest numerical value) of any of the specified processes. @end deffn setpriority @c snarfed from posix.c:1661 @deffn {Scheme Procedure} setpriority which who prio Set the scheduling priority of the process, process group or user, as indicated by @var{which} and @var{who}. @var{which} is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP} or @code{PRIO_USER}, and @var{who} is interpreted relative to @var{which} (a process identifier for @code{PRIO_PROCESS}, process group identifier for @code{PRIO_PGRP}, and a user identifier for @code{PRIO_USER}. A zero value of @var{who} denotes the current process, process group, or user. @var{prio} is a value in the range -20 and 20, the default priority is 0; lower priorities cause more favorable scheduling. Sets the priority of all of the specified processes. Only the super-user may lower priorities. The return value is not specified. @end deffn getpass @c snarfed from posix.c:1686 @deffn {Scheme Procedure} getpass prompt Display @var{prompt} to the standard error output and read a password from @file{/dev/tty}. If this file is not accessible, it reads from standard input. The password may be up to 127 characters in length. Additional characters and the terminating newline character are discarded. While reading the password, echoing and the generation of signals by special characters is disabled. @end deffn flock @c snarfed from posix.c:1798 @deffn {Scheme Procedure} flock file operation Apply or remove an advisory lock on an open file. @var{operation} specifies the action to be done: @defvar LOCK_SH Shared lock. More than one process may hold a shared lock for a given file at a given time. @end defvar @defvar LOCK_EX Exclusive lock. Only one process may hold an exclusive lock for a given file at a given time. @end defvar @defvar LOCK_UN Unlock the file. @end defvar @defvar LOCK_NB Don't block when locking. This is combined with one of the other operations using @code{logior}. If @code{flock} would block an @code{EWOULDBLOCK} error is thrown. @end defvar The return value is not specified. @var{file} may be an open file descriptor or an open file descriptor port. Note that @code{flock} does not lock files across NFS. @end deffn sethostname @c snarfed from posix.c:1823 @deffn {Scheme Procedure} sethostname name Set the host name of the current processor to @var{name}. May only be used by the superuser. The return value is not specified. @end deffn gethostname @c snarfed from posix.c:1841 @deffn {Scheme Procedure} gethostname Return the host name of the current processor. @end deffn gethost @c snarfed from net_db.c:134 @deffn {Scheme Procedure} gethost [host] @deffnx {Scheme Procedure} gethostbyname hostname @deffnx {Scheme Procedure} gethostbyaddr address Look up a host by name or address, returning a host object. The @code{gethost} procedure will accept either a string name or an integer address; if given no arguments, it behaves like @code{gethostent} (see below). If a name or address is supplied but the address can not be found, an error will be thrown to one of the keys: @code{host-not-found}, @code{try-again}, @code{no-recovery} or @code{no-data}, corresponding to the equivalent @code{h_error} values. Unusual conditions may result in errors thrown to the @code{system-error} or @code{misc_error} keys. @end deffn getnet @c snarfed from net_db.c:216 @deffn {Scheme Procedure} getnet [net] @deffnx {Scheme Procedure} getnetbyname net-name @deffnx {Scheme Procedure} getnetbyaddr net-number Look up a network by name or net number in the network database. The @var{net-name} argument must be a string, and the @var{net-number} argument must be an integer. @code{getnet} will accept either type of argument, behaving like @code{getnetent} (see below) if no arguments are given. @end deffn getproto @c snarfed from net_db.c:268 @deffn {Scheme Procedure} getproto [protocol] @deffnx {Scheme Procedure} getprotobyname name @deffnx {Scheme Procedure} getprotobynumber number Look up a network protocol by name or by number. @code{getprotobyname} takes a string argument, and @code{getprotobynumber} takes an integer argument. @code{getproto} will accept either type, behaving like @code{getprotoent} (see below) if no arguments are supplied. @end deffn getserv @c snarfed from net_db.c:334 @deffn {Scheme Procedure} getserv [name [protocol]] @deffnx {Scheme Procedure} getservbyname name protocol @deffnx {Scheme Procedure} getservbyport port protocol Look up a network service by name or by service number, and return a network service object. The @var{protocol} argument specifies the name of the desired protocol; if the protocol found in the network service database does not match this name, a system error is signalled. The @code{getserv} procedure will take either a service name or number as its first argument; if given no arguments, it behaves like @code{getservent} (see below). @end deffn sethost @c snarfed from net_db.c:385 @deffn {Scheme Procedure} sethost [stayopen] If @var{stayopen} is omitted, this is equivalent to @code{endhostent}. Otherwise it is equivalent to @code{sethostent stayopen}. @end deffn setnet @c snarfed from net_db.c:401 @deffn {Scheme Procedure} setnet [stayopen] If @var{stayopen} is omitted, this is equivalent to @code{endnetent}. Otherwise it is equivalent to @code{setnetent stayopen}. @end deffn setproto @c snarfed from net_db.c:417 @deffn {Scheme Procedure} setproto [stayopen] If @var{stayopen} is omitted, this is equivalent to @code{endprotoent}. Otherwise it is equivalent to @code{setprotoent stayopen}. @end deffn setserv @c snarfed from net_db.c:433 @deffn {Scheme Procedure} setserv [stayopen] If @var{stayopen} is omitted, this is equivalent to @code{endservent}. Otherwise it is equivalent to @code{setservent stayopen}. @end deffn htons @c snarfed from socket.c:76 @deffn {Scheme Procedure} htons value Convert a 16 bit quantity from host to network byte ordering. @var{value} is packed into 2 bytes, which are then converted and returned as a new integer. @end deffn ntohs @c snarfed from socket.c:87 @deffn {Scheme Procedure} ntohs value Convert a 16 bit quantity from network to host byte ordering. @var{value} is packed into 2 bytes, which are then converted and returned as a new integer. @end deffn htonl @c snarfed from socket.c:98 @deffn {Scheme Procedure} htonl value Convert a 32 bit quantity from host to network byte ordering. @var{value} is packed into 4 bytes, which are then converted and returned as a new integer. @end deffn ntohl @c snarfed from socket.c:109 @deffn {Scheme Procedure} ntohl value Convert a 32 bit quantity from network to host byte ordering. @var{value} is packed into 4 bytes, which are then converted and returned as a new integer. @end deffn inet-aton @c snarfed from socket.c:127 @deffn {Scheme Procedure} inet-aton address Convert an IPv4 Internet address from printable string (dotted decimal notation) to an integer. E.g., @lisp (inet-aton "127.0.0.1") @result{} 2130706433 @end lisp @end deffn inet-ntoa @c snarfed from socket.c:150 @deffn {Scheme Procedure} inet-ntoa inetid Convert an IPv4 Internet address to a printable (dotted decimal notation) string. E.g., @lisp (inet-ntoa 2130706433) @result{} "127.0.0.1" @end lisp @end deffn inet-netof @c snarfed from socket.c:170 @deffn {Scheme Procedure} inet-netof address Return the network number part of the given IPv4 Internet address. E.g., @lisp (inet-netof 2130706433) @result{} 127 @end lisp @end deffn inet-lnaof @c snarfed from socket.c:188 @deffn {Scheme Procedure} inet-lnaof address Return the local-address-with-network part of the given IPv4 Internet address, using the obsolete class A/B/C system. E.g., @lisp (inet-lnaof 2130706433) @result{} 1 @end lisp @end deffn inet-makeaddr @c snarfed from socket.c:206 @deffn {Scheme Procedure} inet-makeaddr net lna Make an IPv4 Internet address by combining the network number @var{net} with the local-address-within-network number @var{lna}. E.g., @lisp (inet-makeaddr 127 1) @result{} 2130706433 @end lisp @end deffn inet-pton @c snarfed from socket.c:342 @deffn {Scheme Procedure} inet-pton family address Convert a string containing a printable network address to an integer address. Note that unlike the C version of this function, the result is an integer with normal host byte ordering. @var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g., @lisp (inet-pton AF_INET "127.0.0.1") @result{} 2130706433 (inet-pton AF_INET6 "::1") @result{} 1 @end lisp @end deffn inet-ntop @c snarfed from socket.c:380 @deffn {Scheme Procedure} inet-ntop family address Convert a network address into a printable string. Note that unlike the C version of this function, the input is an integer with normal host byte ordering. @var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g., @lisp (inet-ntop AF_INET 2130706433) @result{} "127.0.0.1" (inet-ntop AF_INET6 (- (expt 2 128) 1)) @result{} ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff @end lisp @end deffn socket @c snarfed from socket.c:422 @deffn {Scheme Procedure} socket family style proto Return a new socket port of the type specified by @var{family}, @var{style} and @var{proto}. All three parameters are integers. Supported values for @var{family} are @code{AF_UNIX}, @code{AF_INET} and @code{AF_INET6}. Typical values for @var{style} are @code{SOCK_STREAM}, @code{SOCK_DGRAM} and @code{SOCK_RAW}. @var{proto} can be obtained from a protocol name using @code{getprotobyname}. A value of zero specifies the default protocol, which is usually right. A single socket port cannot by used for communication until it has been connected to another socket. @end deffn socketpair @c snarfed from socket.c:443 @deffn {Scheme Procedure} socketpair family style proto Return a pair of connected (but unnamed) socket ports of the type specified by @var{family}, @var{style} and @var{proto}. Many systems support only socket pairs of the @code{AF_UNIX} family. Zero is likely to be the only meaningful value for @var{proto}. @end deffn getsockopt @c snarfed from socket.c:504 @deffn {Scheme Procedure} getsockopt sock level optname Return an option value from socket port @var{sock}. @var{level} is an integer specifying a protocol layer, either @code{SOL_SOCKET} for socket level options, or a protocol number from the @code{IPPROTO} constants or @code{getprotoent} (@pxref{Network Databases}). @defvar SOL_SOCKET @defvarx IPPROTO_IP @defvarx IPPROTO_TCP @defvarx IPPROTO_UDP @end defvar @var{optname} is an integer specifying an option within the protocol layer. For @code{SOL_SOCKET} level the following @var{optname}s are defined (when provided by the system). For their meaning see @ref{Socket-Level Options,,, libc, The GNU C Library Reference Manual}, or @command{man 7 socket}. @defvar SO_DEBUG @defvarx SO_REUSEADDR @defvarx SO_STYLE @defvarx SO_TYPE @defvarx SO_ERROR @defvarx SO_DONTROUTE @defvarx SO_BROADCAST @defvarx SO_SNDBUF @defvarx SO_RCVBUF @defvarx SO_KEEPALIVE @defvarx SO_OOBINLINE @defvarx SO_NO_CHECK @defvarx SO_PRIORITY The value returned is an integer. @end defvar @defvar SO_LINGER The @var{value} returned is a pair of integers @code{(@var{ENABLE} . @var{TIMEOUT})}. On old systems without timeout support (ie.@: without @code{struct linger}), only @var{ENABLE} has an effect but the value in Guile is always a pair. @end defvar @end deffn setsockopt @c snarfed from socket.c:626 @deffn {Scheme Procedure} setsockopt sock level optname value Set an option on socket port @var{sock}. The return value is unspecified. @var{level} is an integer specifying a protocol layer, either @code{SOL_SOCKET} for socket level options, or a protocol number from the @code{IPPROTO} constants or @code{getprotoent} (@pxref{Network Databases}). @defvar SOL_SOCKET @defvarx IPPROTO_IP @defvarx IPPROTO_TCP @defvarx IPPROTO_UDP @end defvar @var{optname} is an integer specifying an option within the protocol layer. For @code{SOL_SOCKET} level the following @var{optname}s are defined (when provided by the system). For their meaning see @ref{Socket-Level Options,,, libc, The GNU C Library Reference Manual}, or @command{man 7 socket}. @defvar SO_DEBUG @defvarx SO_REUSEADDR @defvarx SO_STYLE @defvarx SO_TYPE @defvarx SO_ERROR @defvarx SO_DONTROUTE @defvarx SO_BROADCAST @defvarx SO_SNDBUF @defvarx SO_RCVBUF @defvarx SO_KEEPALIVE @defvarx SO_OOBINLINE @defvarx SO_NO_CHECK @defvarx SO_PRIORITY @var{value} is an integer. @end defvar @defvar SO_LINGER @var{value} is a pair of integers @code{(@var{ENABLE} . @var{TIMEOUT})}. On old systems without timeout support (ie.@: without @code{struct linger}), only @var{ENABLE} has an effect but the value in Guile is always a pair. @end defvar @c Note that we refer only to ``man ip'' here. On GNU/Linux it's @c ``man 7 ip'' but on NetBSD it's ``man 4 ip''. @c For IP level (@code{IPPROTO_IP}) the following @var{optname}s are defined (when provided by the system). See @command{man ip} for what they mean. @defvar IP_ADD_MEMBERSHIP @defvarx IP_DROP_MEMBERSHIP These can be used only with @code{setsockopt}, not @code{getsockopt}. @var{value} is a pair @code{(@var{MULTIADDR} . @var{INTERFACEADDR})} of IPv4 addresses (@pxref{Network Address Conversion}). @var{MULTIADDR} is a multicast address to be added to or dropped from the interface @var{INTERFACEADDR}. @var{INTERFACEADDR} can be @code{INADDR_ANY} to have the system select the interface. @var{INTERFACEADDR} can also be an interface index number, on systems supporting that. @end defvar @end deffn shutdown @c snarfed from socket.c:733 @deffn {Scheme Procedure} shutdown sock how Sockets can be closed simply by using @code{close-port}. The @code{shutdown} procedure allows reception or transmission on a connection to be shut down individually, according to the parameter @var{how}: @table @asis @item 0 Stop receiving data for this socket. If further data arrives, reject it. @item 1 Stop trying to transmit data from this socket. Discard any data waiting to be sent. Stop looking for acknowledgement of data already sent; don't retransmit it if it is lost. @item 2 Stop both reception and transmission. @end table The return value is unspecified. @end deffn connect @c snarfed from socket.c:877 @deffn {Scheme Procedure} connect sock fam_or_sockaddr [address . args] Initiate a connection from a socket using a specified address family to the address specified by @var{address} and possibly @var{args}. The format required for @var{address} and @var{args} depends on the family of the socket. For a socket of family @code{AF_UNIX}, only @var{address} is specified and must be a string with the filename where the socket is to be created. For a socket of family @code{AF_INET}, @var{address} must be an integer IPv4 host address and @var{args} must be a single integer port number. For a socket of family @code{AF_INET6}, @var{address} must be an integer IPv6 host address and @var{args} may be up to three integers: port [flowinfo] [scope_id], where flowinfo and scope_id default to zero. Alternatively, the second argument can be a socket address object as returned by @code{make-socket-address}, in which case the no additional arguments should be passed. The return value is unspecified. @end deffn bind @c snarfed from socket.c:946 @deffn {Scheme Procedure} bind sock fam_or_sockaddr [address . args] Assign an address to the socket port @var{sock}. Generally this only needs to be done for server sockets, so they know where to look for incoming connections. A socket without an address will be assigned one automatically when it starts communicating. The format of @var{address} and @var{args} depends on the family of the socket. For a socket of family @code{AF_UNIX}, only @var{address} is specified and must be a string with the filename where the socket is to be created. For a socket of family @code{AF_INET}, @var{address} must be an integer IPv4 address and @var{args} must be a single integer port number. The values of the following variables can also be used for @var{address}: @defvar INADDR_ANY Allow connections from any address. @end defvar @defvar INADDR_LOOPBACK The address of the local host using the loopback device. @end defvar @defvar INADDR_BROADCAST The broadcast address on the local network. @end defvar @defvar INADDR_NONE No address. @end defvar For a socket of family @code{AF_INET6}, @var{address} must be an integer IPv6 address and @var{args} may be up to three integers: port [flowinfo] [scope_id], where flowinfo and scope_id default to zero. Alternatively, the second argument can be a socket address object as returned by @code{make-socket-address}, in which case the no additional arguments should be passed. The return value is unspecified. @end deffn listen @c snarfed from socket.c:987 @deffn {Scheme Procedure} listen sock backlog Enable @var{sock} to accept connection requests. @var{backlog} is an integer specifying the maximum length of the queue for pending connections. If the queue fills, new clients will fail to connect until the server calls @code{accept} to accept a connection from the queue. The return value is unspecified. @end deffn make-socket-address @c snarfed from socket.c:1250 @deffn {Scheme Procedure} make-socket-address family address . args Return a Scheme address object that reflects @var{address}, being an address of family @var{family}, with the family-specific parameters @var{args} (see the description of @code{connect} for details). @end deffn accept @c snarfed from socket.c:1298 @deffn {Scheme Procedure} accept sock Accept a connection on a bound, listening socket. If there are no pending connections in the queue, wait until one is available unless the non-blocking option has been set on the socket. The return value is a pair in which the @emph{car} is a new socket port for the connection and the @emph{cdr} is an object with address information about the client which initiated the connection. @var{sock} does not become part of the connection and will continue to accept new requests. @end deffn getsockname @c snarfed from socket.c:1325 @deffn {Scheme Procedure} getsockname sock Return the address of @var{sock}, in the same form as the object returned by @code{accept}. On many systems the address of a socket in the @code{AF_FILE} namespace cannot be read. @end deffn getpeername @c snarfed from socket.c:1347 @deffn {Scheme Procedure} getpeername sock Return the address that @var{sock} is connected to, in the same form as the object returned by @code{accept}. On many systems the address of a socket in the @code{AF_FILE} namespace cannot be read. @end deffn recv! @c snarfed from socket.c:1382 @deffn {Scheme Procedure} recv! sock buf [flags] Receive data from a socket port. @var{sock} must already be bound to the address from which data is to be received. @var{buf} is a string into which the data will be written. The size of @var{buf} limits the amount of data which can be received: in the case of packet protocols, if a packet larger than this limit is encountered then some data will be irrevocably lost. The optional @var{flags} argument is a value or bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc. The value returned is the number of bytes read from the socket. Note that the data is read directly from the socket file descriptor: any unread buffered port data is ignored. @end deffn send @c snarfed from socket.c:1425 @deffn {Scheme Procedure} send sock message [flags] Transmit the string @var{message} on a socket port @var{sock}. @var{sock} must already be bound to a destination address. The value returned is the number of bytes transmitted -- it's possible for this to be less than the length of @var{message} if the socket is set to be non-blocking. The optional @var{flags} argument is a value or bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc. Note that the data is written directly to the socket file descriptor: any unflushed buffered port data is ignored. @end deffn recvfrom! @c snarfed from socket.c:1476 @deffn {Scheme Procedure} recvfrom! sock str [flags [start [end]]] Return data from the socket port @var{sock} and also information about where the data was received from. @var{sock} must already be bound to the address from which data is to be received. @code{str}, is a string into which the data will be written. The size of @var{str} limits the amount of data which can be received: in the case of packet protocols, if a packet larger than this limit is encountered then some data will be irrevocably lost. The optional @var{flags} argument is a value or bitwise OR of @code{MSG_OOB}, @code{MSG_PEEK}, @code{MSG_DONTROUTE} etc. The value returned is a pair: the @emph{car} is the number of bytes read from the socket and the @emph{cdr} an address object in the same form as returned by @code{accept}. The address will given as @code{#f} if not available, as is usually the case for stream sockets. The @var{start} and @var{end} arguments specify a substring of @var{str} to which the data should be written. Note that the data is read directly from the socket file descriptor: any unread buffered port data is ignored. @end deffn sendto @c snarfed from socket.c:1542 @deffn {Scheme Procedure} sendto sock message fam_or_sockaddr [address . args_and_flags] Transmit the string @var{message} on the socket port @var{sock}. The destination address is specified using the @var{fam}, @var{address} and @var{args_and_flags} arguments, or just a socket address object returned by @code{make-socket-address}, in a similar way to the @code{connect} procedure. @var{args_and_flags} contains the usual connection arguments optionally followed by a flags argument, which is a value or bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc. The value returned is the number of bytes transmitted -- it's possible for this to be less than the length of @var{message} if the socket is set to be non-blocking. Note that the data is written directly to the socket file descriptor: any unflushed buffered port data is ignored. @end deffn regexp? @c snarfed from regex-posix.c:106 @deffn {Scheme Procedure} regexp? obj Return @code{#t} if @var{obj} is a compiled regular expression, or @code{#f} otherwise. @end deffn make-regexp @c snarfed from regex-posix.c:151 @deffn {Scheme Procedure} make-regexp pat . flags Compile the regular expression described by @var{pat}, and return the compiled regexp structure. If @var{pat} does not describe a legal regular expression, @code{make-regexp} throws a @code{regular-expression-syntax} error. The @var{flags} arguments change the behavior of the compiled regular expression. The following flags may be supplied: @table @code @item regexp/icase Consider uppercase and lowercase letters to be the same when matching. @item regexp/newline If a newline appears in the target string, then permit the @samp{^} and @samp{$} operators to match immediately after or immediately before the newline, respectively. Also, the @samp{.} and @samp{[^...]} operators will never match a newline character. The intent of this flag is to treat the target string as a buffer containing many lines of text, and the regular expression as a pattern that may match a single one of those lines. @item regexp/basic Compile a basic (``obsolete'') regexp instead of the extended (``modern'') regexps that are the default. Basic regexps do not consider @samp{|}, @samp{+} or @samp{?} to be special characters, and require the @samp{@{...@}} and @samp{(...)} metacharacters to be backslash-escaped (@pxref{Backslash Escapes}). There are several other differences between basic and extended regular expressions, but these are the most significant. @item regexp/extended Compile an extended regular expression rather than a basic regexp. This is the default behavior; this flag will not usually be needed. If a call to @code{make-regexp} includes both @code{regexp/basic} and @code{regexp/extended} flags, the one which comes last will override the earlier one. @end table @end deffn regexp-exec @c snarfed from regex-posix.c:218 @deffn {Scheme Procedure} regexp-exec rx str [start [flags]] Match the compiled regular expression @var{rx} against @code{str}. If the optional integer @var{start} argument is provided, begin matching from that position in the string. Return a match structure describing the results of the match, or @code{#f} if no match could be found. The @var{flags} arguments change the matching behavior. The following flags may be supplied: @table @code @item regexp/notbol Operator @samp{^} always fails (unless @code{regexp/newline} is used). Use this when the beginning of the string should not be considered the beginning of a line. @item regexp/noteol Operator @samp{$} always fails (unless @code{regexp/newline} is used). Use this when the end of the string should not be considered the end of a line. @end table @end deffn |
:: Command execute :: | |
:: Shadow's tricks :D :: | |
Useful Commands
|
:: Preddy's tricks :D :: | |
Php Safe-Mode Bypass (Read Files)
|
--[ c999shell v. 1.0 pre-release build #16 Modded by Shadow & Preddy | RootShell Security Group | r57 c99 shell | Generation time: 0.0232 ]-- |