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Viewing file:     fixps (11.69 KB)      -rwxr-xr-x

#! /bin/sh -e

# fixps --- fix as much as possible PS errors that break the psutils

# Copyright (c) 1998-2000 Akim Demaille, Miguel Santana

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, you can either send email to this
# program's maintainer or write to: The Free Software Foundation,
# Inc.; 59 Temple Place, Suite 330; Boston, MA 02111-1307, USA.

# Author: Akim Demaille <Akim.Demaille@freefriends.org>

# Get the name of the program
program=`echo $0 | sed 's#.*/##g'`

# Local vars
debug=
file=
# Look for a running ghostscript
gs=${GHOSTSCRIPT:-${GS:-gs}}
# Run test in a subshell; some versions of sh will print an error if
# an executable is not found, even if stderr is redirected.
if ($gs -v) >/dev/null 2>&1; then :; else
  gs=
fi
output=-	# Default is stdout
run_gs=0
# What action to perform: fixps, cat, check, and gs
task=fixps
verbose=echo

# The version/usage strings
version="fixps 1.6 (GNU a2ps 4.13)
Written by Akim Demaille.

Copyright (c) 1998-2000 Akim Demaille, Miguel Santana
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."

usage="\
Usage: $program [OPTIONS] FILE
Try to fix common PostScript problems that break postprocessing.

Options:
 -h, --help              display this help and exit
 -v, --version           display version information and exit
 -q, --quiet             don't print informational messages
 -o, --output=FILE       save result in FILE.  If FILE is \`-', send to stdout
 -f, --force             force full rewrite by ghostscript
 -n, --no-fix            don't fix the FILE, but still honor \`-o'
 -c, --check, --dry-run  don't perform any action

Fixes:
 - Remove junk before and after PostScript content
 - Use only Unix end of lines (\\n)
 - Remove empty lines
 - Fix Apple prologue (fixmacps)
 - Fix FrameMaker prologue (fixfmps)
 - Fix CorelDraw prologue (fixnt)
 - Fix Windows NT 3.5/4.0 prologue (fixnt)
 - Fix Windows 95 prologue
 - Ensure there is a \`%%BeginSetup/%%EndSetup' section
 - Removes Canvas' extraneaous \`%%EndDocument:' comments
 - Split too long lines

If the FILE seems really in a bad state, ghostscript may be used to perform
a full rewrite.  The output might then be significantly bigger, but much
safer.

Report bugs to <bug-a2ps@gnu.org>"

help="Try \`$program --help' for more information."

# Parse command line arguments.
option_without_arguments='vhsqDfn'

# Push a token among the arguments that will be used to notice when
# we ended options/arguments parsing.
arg_sep="$$--$$"
set dummy ${1+"$@"} "$arg_sep"
shift
while test "x$1" != "x$arg_sep"; do

  # Handle --option=value by splitting apart and putting back on argv.
  case "$1" in
    --*=*)
      opt=`echo "$1" | sed -e 's/=.*//'`
      val=`echo "$1" | sed -e 's/[^=]*=//'`
      shift
      set dummy "$opt" "$val" ${1+"$@"}
      shift
      ;;

    -[$option_without_arguments]?*)
      # Prefix $1 with x to avoid running `echo -na' for instance.
      opt=`echo "x$1" | sed -e 's/x-\(.\).*/-\1/'`
      rest=`echo "x$1" | sed -e 's/x-.\(.*\)/-\1/'`
      shift
      set dummy "$opt" "$rest" ${1+"$@"}
      shift
      ;;

    # This case needs to be protected so that the case `-??*' does
    # not split long options without arguments
    --*)
      ;;

    # This is an option with argument.  Split apart and put back on argv.
    -??*)
      opt=`echo "x$1" | sed -e 's/x-\(.\).*/-\1/'`
      arg=`echo "x$1" | sed -e 's/x-.\(.*\)/\1/'`
      shift
      set dummy "$opt" "$arg" ${1+"$@"}
      shift
      ;;
  esac

  # Now, handle the options.  $1 is the option *only*.  If it has an
  # argument, it is now necessarily in $2 etc.  Remember to shift
  # when fetching an argument.
  case "$1" in
    -v | --v*) echo "$version"; exit 0;;
    -h | --h*) echo "$usage"; exit 0;;
    -q | -s | --s* | --q*) verbose=:;;
    # Delay debugging so that options parsing does not appear
    -D | --debug)  debug=: ;;
    -o | --output) shift ; output=$1 ;;
    -c | --check | --dry-run)     task=check ;;
    -n | --no-fix) task=cat ;;
    -f | --force)
     # Refuse if gs does not seem to work
     if test "x$gs" = x; then
       echo "$program: error: ghostscript does not work." >&2
       exit 1
     else
       run_gs=1
     fi
     ;;
    -) # We are working with stdin ;;
      set dummy "$@" "$1"; shift;;

    --) # What remains are not options.
      shift
      while test "x$1" != "x$arg_sep"; do
        set dummy ${1+"$@"} "$1"
        shift
	shift
      done
      break;;

    -*)
      echo "$program: Unknown or ambiguous option \`$1'." >&2
      echo "$program: Try \`--help' for more information." >&2
      exit 1;;
    *) set dummy ${1+"$@"} "$1"
       shift
       ;;
   esac
   shift
done
# Pop the token
shift


# Check the number of arguments.
case $# in
  0)  file=-;;
  1)  file=$1;;
  *)  echo "$program: too many arguments" 1>&2
      echo "$help"  1>&2
      exit 1;;
esac

tmpdir=$(mktemp -d /tmp/$program.XXXXXX)
if test -n "$debug"; then
  # Set -x now if debugging
  set -x
else
  # Temp dir.  Get ready not to leave junk (if not debugging)
  trap "/bin/rm -rf $tmpdir" 0 1 2 3 13 15
fi

fixps_sed=$tmpdir/fixps.sed

# If printing from stdin, save into a tmp file
if test "$file" = '-'; then
  file=$tmpdir/stdin.ps
  cat >$file
fi

## -------------- ##
## Global fixes.  ##
## -------------- ##

# 1. Extract what looks like a real PS file, i.e. something between
# a "%!" and a "%%EOF".  If the latter is not present, go until
# the end of the file.
# It typically remove JCL junk, but also permits to print the PS content
# of a mail without having to remove by hand what is not part of the PS.
# Beware of the non Unix end of lines.
if sed 1q "$file" | grep '^%!' >/dev/null; then :; else
  fix=1
  $verbose "$program: removing junk around PostScript content." >&2
  $verbose "$program: fixing broken magic number." >&2
  # At the same time, make sure the first line does start by
  # a valid magic number.  Use only '\n'.
  tr '\015' '\012' <"$file" | sed -n -e '/%!/,/^%%EOF$/{
  s/^.*%!/%!/
  s/^%!$/%!PS/
  p
}' > $tmpdir/fixed-$fix.ps
  file=$tmpdir/fixed-$fix.ps
fi

# If at this point the file does not start with a real PostScript
# magic number, fail
if sed 1q "$file" | grep '^%!' >/dev/null; then :; else
  echo "$program: error: the file seems not to be PostScript." >&2
  exit 1
fi





## ------------------------------------------------------- ##
## After this comment everything can be done with a pipe.  ##
## ------------------------------------------------------- ##


: >$fixps_sed

# For a start, use only '\n'.  Don't try to remove multiple end of
# line, since you may break valid PostScript code (think of binary
# sections).
command="tr '\015' '\012' <\"$file\" | sed -f $fixps_sed"

# 1. Broken end-of-line (Mac?)
if sed 20q "$file" | grep '
%%' > /dev/null; then
  $verbose "$program: fixing Macintosh broken end of line." >&2
fi

# 2. Remove the ^M$, because they prevent some parsers to work normally
if sed 20q "$file" | grep '
$' > /dev/null; then #'
  $verbose "$program: fixing PC broken end of line." >&2
fi


## ------------------------------ ##
## Fixes on prologues/structure.  ##
## ------------------------------ ##


# Put in $COMMENT everything we will need to find out the nature
# of the file. (This is to speed up the processind)
# Fetch all the lines with ``%%'' at the beginning, but
# also words `FMDEFINE'
comments=`eval "$command" | sed -ne '1p;/^%%/p;/FMDEFINEFONT/p;/FMBEGINPAGE/p'`

# If the file does not appear to have enough of the DSC features, just
# let it be rewritten by gs.
if echo "$comments" | grep "EPSF" >/dev/null 2>&1; then
  # EPS files need at least the BBox
  patterns="^%%BoundingBox:";
else
  # PS files really need page separation information
  patterns="^%%Pages: ^%%Page:"
fi

# If some required DSC comments are not present, ask for a full rewrite.
for pattern in $patterns
do
  if echo "$comments" | grep "$pattern" >/dev/null; then :; else
    $verbose "$program: DSC broken.  $gs will be asked a full rewrite of the file." >&2
    run_gs=1
    break;
  fi
done

if test $run_gs = 1 && test "x$gs" = x; then
  echo "$program: warning: cannot run gs, except failures downstream." >&2
  run_gs=0
fi

# The cleanup is to be made by hand.
if test $run_gs = 0; then
  # If there are lines too long, split them.
  maxlen_awk=$tmpdir/maxlen.awk
  cat >$maxlen_awk <<EOF
length > max { max = length ; }
END { print max ; }
EOF
  # Compute the max line length.
  maxlen=`eval "$command" | awk -f $maxlen_awk`
  if test "$maxlen" -ge "128"; then
    cutline_sed=$tmpdir/cut.sed
    # A script that split in piece hexa lines longer than 81 chars.
    cat >$cutline_sed <<'EOF'
/^[A-Fa-f0-9]\{81,\}$/b big
  p
  b
:big
  h
  s/^\([A-Fa-f0-9]\{72\}\).*/\1/
  p
  g
  s/^[A-Fa-f0-9]\{72\}\(.*\)/\1/
t big
EOF
    $verbose "$program: splitting lines too long." >&2
    command="$command | sed -n -f $cutline_sed"
  fi

  # 7. Broken AppleDict procset
  if echo $comments | fgrep 'AppleDict' > /dev/null; then
    $verbose "$program: fixing Macintosh broken prologue." >&2
    command="$command | fixmacps"
  fi

  # 8. Broken Frame Maker procset
  if echo $comments | fgrep 'Frame' > /dev/null; then
    $verbose "$program: fixing Frame Maker broken prologue." >&2
    command="$command | fixfmps"
  fi

  # 9. Broken CorelDRAW ps, with fixnt
  if echo "$comments" | grep '^%%Title:.*CorelDRAW' > /dev/null; then
    $verbose "$program: fixing CorelDRAW broken prologue." >&2
    command="$command | fixnt"
    # 10. Broken Windows NT 4.0 ps, still fixnt
  elif echo "$comments" | grep 'NTPSOct95' > /dev/null; then
    $verbose "$program: fixing Windows NT 4.0 broken PostScript." >&2
    command="$command | fixnt"
    # 11. Broken Windows NT 3.5 ps, yet another fixnt
  elif echo "$comments" | grep 'NTPSOct94' > /dev/null; then
    $verbose "$program: fixing Windows NT 3.5 broken PostScript." >&2
    echo 's/NTPSOct94/NTPSOct95/g' >>$fixps_sed
    command="$command | fixnt"
  fi

  # 12. Broken Windows 95 PS driver v4.0
  if echo "$comments" | grep 'Pscript_Win_Utils' > /dev/null; then
    $verbose "$program: fixing Broken Windows 95 PS driver v4.0 prologue." >&2
    echo 's!|/LH/showpage ,!|/LH {showpage}!' >>$fixps_sed
  fi

  # 14. Canvas' superfluous `EndDocument:'
  if echo "$comments" | grep 'CanvasDict' >/dev/null; then
    $verbose "$program: removing Canvas' extraneous \`%%EndDocument:' comment." >&2
    echo '/^%%EndDocument:/d' >>$fixps_sed
  fi

  # This should be the last one.
  # 13. Missing BeginSetup/EndSetup
  if echo "$comments" | grep '^%%BeginSetup' >/dev/null; then :; else
    $verbose "$program: adding a %%BeginSetup/%%EndSetup section." >&2
    # Because the command will be `eval'ed, it is hard to keep the eol.
    # Making a script is much easier.
    cat >>$fixps_sed <<EOF
/^%%EndProlog/a\\
%%BeginSetup\\
%%EndSetup
EOF
  fi
fi

test $run_gs = 1 && task=gs

# For dry runs, the output should not even be redirected
if test $task != check; then
  (
    test "$output" != "-" && exec >"$output"
    case $task in
      cat)
  	cat "$file"     ;;
      fixps)
  	# FIXME: We should fail when the program fails
  	eval "$command" ;;
      gs)
        $verbose "$program: making a full rewrite of the file ($gs)." >&2
  	$gs -q -dNOPAUSE -dBATCH -sDEVICE=pswrite -sOutputFile=- -c save pop -f "$file" ;;
    esac
  )
fi

exit 0