#!/bin/sh

# Extract message IDs from source files.
# This shell script is a temporary expedient until glocale+xgettext works.

# Copyright 1995, 1998 Free Software Foundation.

# 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; see the file COPYING.
# If not, write to the Free Software Foundation,
# 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

case $1 in
-* | '') echo >&2 "Usage: $0 file..."; exit 1
esac

# Sed script to output names of every function and macro
# whose first parameter's name ends in `msgid'.
# By convention, these parameters are message IDs.
getmsgidUsers='
  /^\([$A-Z_a-z][$0-9A-Z_a-z]*\)[	 ]*([^),]*msgid[	 ]*[),].*/{s//\1/; p; d; }
  /^#[	 ]*define[	 ][	 ]*\([$A-Z_a-z][$0-9A-Z_a-z]*\)([^),]*msgid[	 ]*[),].*/{s//\1/; p; d; }
  d
'

# Sed script to turn each such function or macro name F (alone on a line)
# into a sed command converting `F ("msgid"' to `msgid  "msgid"' on a new line.
turnIntoSedScript='
  s|.*|s/[^$0-9A-Z_a-z]&[	 ]*([	 ]*\\("[^"]*"\\)/\\\
msgid  \\1\\\
/g|
'

# Generate a sed script to extract message ID directives from function callers.
extractFromCallers=`
	sed "$getmsgidUsers" "${@?}" | sort -u | sed "$turnIntoSedScript"
`

# Extract the message IDs, removing duplicates.
sed '
  # Remove backslash-newlines.
  : start
  /\\$/{
    N
    s/\\\n//
    b start
  }

  # Translate escaped backslashes and double-quotes into something safe.
  # Do backslashes first!
  s/\\\\/\\134/g
  s/\\"/\\042/g

  # Convert all strings between "...msgid[] =" and "}" lines to msgid lines.
  /^[	 $*0-9A-Z_a-z]*msgid[	 ]*\[[	 ]*\][	 ]*=/,/^[	 ]*}/{
    s/"[^"][^"]*"/\
msgid  &\
/g
  }

  # Convert caller msgid strings to msgid lines.
  '"$extractFromCallers"'

  # Restore escaped backslashes and double-quotes.
  s/\\042/\\"/g
  s/\\134/\\\\/g

' "${@?}" | grep '^msgid  "' | sort -u