Viewing file:  ctype.h (2.14 KB) -rw-r--r--
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/*
* ctype.h
*
* This assumes ISO 8859-1, being a reasonable superset of ASCII.
*/
#ifndef _CTYPE_H
#define _CTYPE_H
#ifndef __CTYPE_NO_INLINE
# define __ctype_inline extern __inline__
#else
# define __ctype_inline
#endif
/*
* This relies on the following definitions:
*
* cntrl = !print
* alpha = upper|lower
* graph = punct|alpha|digit
* blank = '\t' || ' ' (per POSIX requirement)
*/
enum {
__ctype_upper = (1 << 0),
__ctype_lower = (1 << 1),
__ctype_digit = (1 << 2),
__ctype_xdigit = (1 << 3),
__ctype_space = (1 << 4),
__ctype_print = (1 << 5),
__ctype_punct = (1 << 6),
__ctype_cntrl = (1 << 7),
};
extern const unsigned char __ctypes[];
__ctype_inline int isalnum(int __c)
{
return __ctypes[__c+1] &
(__ctype_upper|__ctype_lower|__ctype_digit);
}
__ctype_inline int isalpha(int __c)
{
return __ctypes[__c+1] &
(__ctype_upper|__ctype_lower);
}
__ctype_inline int isascii(int __c)
{
return !(__c & ~0x7f);
}
__ctype_inline int isblank(int __c)
{
return (__c == '\t') || (__c == ' ');
}
__ctype_inline int iscntrl(int __c)
{
return __ctypes[__c+1] & __ctype_cntrl;
}
__ctype_inline int isdigit(int __c)
{
return ((unsigned)__c - '0') <= 9;
}
__ctype_inline int isgraph(int __c)
{
return __ctypes[__c+1] &
(__ctype_upper|__ctype_lower|__ctype_digit|__ctype_punct);
}
__ctype_inline int islower(int __c)
{
return __ctypes[__c+1] & __ctype_lower;
}
__ctype_inline int isprint(int __c)
{
return __ctypes[__c+1] & __ctype_print;
}
__ctype_inline int ispunct(int __c)
{
return __ctypes[__c+1] & __ctype_punct;
}
__ctype_inline int isspace(int __c)
{
return __ctypes[__c+1] & __ctype_space;
}
__ctype_inline int isupper(int __c)
{
return __ctypes[__c+1] & __ctype_upper;
}
__ctype_inline int isxdigit(int __c)
{
return __ctypes[__c+1] & __ctype_xdigit;
}
/* Note: this is decimal, not hex, to avoid accidental promotion to unsigned */
#define _toupper(__c) ((__c) & ~32)
#define _tolower(__c) ((__c) | 32)
__ctype_inline int toupper(int __c)
{
return islower(__c) ? _toupper(__c) : __c;
}
__ctype_inline int tolower(int __c)
{
return isupper(__c) ? _tolower(__c) : __c;
}
#endif /* _CTYPE_H */
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