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#!/bin/sh
#
#  Copyright (C) 2003 Free Software Foundation, Inc.
#  Contributed by Neil Booth, May 2003.
#
# 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, write to the Free Software
# Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Usage: opts.sh outfile.c outfile.h file1.opt [file2.opt, ...]

# Always operate in the C locale.
LANG=C
LANGUAGE=C
LC_ALL=C
export LANG LANGUAGE LC_ALL

# Set AWK if environment has not already set it.
AWK=${AWK-awk}

SORT=sort		# Could be /bin/sort or /usr/bin/sort

C_FILE=$1; shift
H_FILE=$1; shift

cat "$@" | ${AWK} '
	BEGIN{ RS=""; FS="\n" }
	# Ignore comments and blank lines
	/^[ \t]*(;|$)/	{ next }
	/^[^ \t]/ 	{ gsub ("\n", "\034", $0); print }
' | ${SORT} | ${AWK} '
    function switch_flags (langs,   flags)
    {
	langs = ":" langs ":"
	gsub( " ", ":", langs)
	flags = "0"
        if (langs ~ ":C:") flags = flags " | CL_C"
        if (langs ~ ":ObjC:") flags = flags " | CL_OBJC"
        if (langs ~ ":C\\+\\+:") flags = flags " | CL_CXX"
        if (langs ~ ":ObjC\\+\\+:") flags = flags " | CL_OBJCXX"
        if (langs ~ ":Joined:") flags = flags " | CL_JOINED"
        if (langs ~ ":Separate:") flags = flags " | CL_SEPARATE"
        if (langs ~ ":RejectNegative:") flags = flags " | CL_REJECT_NEGATIVE"
	sub( "^0 \\| ", "", flags )
	return flags
    }

    BEGIN {
	c_file = "'${C_FILE}'"
	h_file = "'${H_FILE}'"
	FS = "\034"
	print "/* This file is auto-generated by opts.sh.  */\n" > h_file
	print "/* This file is auto-generated by opts.sh.  */\n" > c_file
	print "struct cl_option\n{"			>> h_file
	print "  const char *opt_text;"			>> h_file
	print "  unsigned char opt_len;"		>> h_file
	print "  unsigned char flags;"			>> h_file
	print "};\n"					>> h_file
	print "enum opt_code\n{"			>> h_file
	print "static const struct cl_option cl_options[] =\n{" >> c_file
    }

    {
	opt = $1
	gsub ( "[^A-Za-z0-9]", "_", opt)
	s = substr ("                                  ", length (opt))
	enum = "OPT_" opt
	printf ("  %s,%s/* -%s */\n", enum, s, $1 )	>> h_file
	printf ("  { \"%s\", %u, %s },\n", $1, \
	    length ($1), switch_flags($2))		>> c_file
    }

    END {
	print "  N_OPTS\n};"				>> h_file
	print "};"					>> c_file
    }
'