#!/bin/sh
# sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh

# Zcmp and zdiff are used to invoke the cmp or the  diff  pro-
# gram  on compressed files.  All options specified are passed
# directly to cmp or diff.  If only 1 file is specified,  then
# the  files  compared  are file1 and an uncompressed file1.gz.
# If two files are specified, then they are  uncompressed  (if
# necessary) and fed to cmp or diff.  The exit status from cmp
# or diff is preserved.

PATH="BINDIR:$PATH"; export PATH
case "$0" in
  *cmp) prog=cmp ; comp=${CMP-cmp}   ;;
  *)    prog=diff; comp=${DIFF-diff} ;;
esac

version="z$prog (gzip) @VERSION@
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software.  You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.

Written by Jean-loup Gailly."

usage="Usage: z$prog [OPTION]... FILE1 [FILE2]
Compare FILE1 to FILE2, using their uncompressed contents if they are
compressed.  If FILE2 is omitted, compare FILE1 to the uncompressed
contents of FILE1.gz.  Do comparisons like '$prog' does.

OPTIONs are the same as for '$prog'.

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

OPTIONS=
FILES=
while :; do
  case $1 in
  --h*) echo "$usage" || exit 2; exit;;
  --v*) echo "$version" || exit 2; exit;;
  --) shift; break;;
  -*) OPTIONS="$OPTIONS $ARG"; shift;;
  esac
done
for file; do
  test -f "$file" || {
    echo "$prog: $file not found or not a regular file"
    exit 2
  }
done
if test $# -eq 1; then
	FILE=`echo "$1" | sed 's/[-.][zZtga]*$//'`
	gzip -cd -- "$1" | $comp $OPTIONS - "$FILE"

elif test $# -eq 2; then
	case "$1" in
        *[-.]gz* | *[-.][zZ] | *.t[ga]z)
                case "$2" in
	        *[-.]gz* | *[-.][zZ] | *.t[ga]z)
			F=`echo "$2" | sed 's|.*/||;s|[-.][zZtga]*||'`
			set -C
			trap 'rm -f /tmp/"$F".$$; exit 2' HUP INT PIPE TERM 0
			gzip -cdfq -- "$2" > /tmp/"$F".$$ || exit
			gzip -cdfq -- "$1" | $comp $OPTIONS - /tmp/"$F".$$
                        STAT="$?"
			/bin/rm -f /tmp/"$F".$$ || STAT=2
			trap - HUP INT PIPE TERM 0
			exit $STAT;;

		*)      gzip -cdfq -- "$1" | $comp $OPTIONS - "$2";;
                esac;;
        *)      case "$2" in
	        *[-.]gz* | *[-.][zZ] | *.t[ga]z)
			gzip -cdfq -- "$2" | $comp $OPTIONS "$1" -;;
                *)      $comp $OPTIONS "$1" "$2";;
                esac;;
	esac
else
	echo "$usage"
	exit 2
fi