#!/bin/sh
# $OpenBSD: genmap.sh,v 1.1 2010/06/03 16:41:12 reyk Exp $

# Copyright (c) 2010 Reyk Floeter <reyk@vantronix.net>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

TOK=$(echo ${2} | tr "[:lower:]" "[:upper:]")
tok=$(echo ${2} | tr "[:upper:]" "[:lower:]")

MAP=$(grep "struct iked_constmap" $1 |
	sed -Ee "s/.*${tok}_([^_]+)_map.*/\1/g")
DFLT=$(grep -E "#define ([^_]+)_DEFAULT_" $1 |
	sed -Ee "s/.*${TOK}_DEFAULT_([^[:space:]]+).*/\1/g")

cat <<EOF
/* Automatically generated, do not edit */
#include <sys/param.h>
#include <sys/types.h>

#include "types.h"
#include "${tok}.h"

EOF

for i in $MAP; do
	lower=$(echo $i | tr "[:upper:]" "[:lower:]")
	upper=$(echo $i | tr "[:lower:]" "[:upper:]")

	echo "struct iked_constmap ${tok}_${lower}_map[] = {"

	X="${TOK}_${upper}"
	grep "$X" $1 | grep -v '\\' | sed -Ee \
	    "s/#define.*${X}_([^[:blank:]]+).*\/\* (.+) \*\/$\
/        { ${X}_\1, \"\1\", \"\2\" },/"

	echo "        { 0 }"
	echo "};"
done

for i in $DFLT; do
	lower=$(echo $i | tr "[:upper:]" "[:lower:]")
	upper=$(echo $i | tr "[:lower:]" "[:upper:]")
	type=$(echo $lower | sed "s/[^_]*_//")

	sed -ne "{
		/${TOK}_DEFAULT_${i}/ { 
			/^$/ { H; d; q; };
			/[^\\\\]$/ { H; d; q; };
		};
		/${TOK}_DEFAULT_${i}/,/[^\\\\]$/{ H; d;	};
	};
	$ {
		g;
		s/#define ${TOK}_DEFAULT_${upper}/\
struct iked_${type} ${tok}_default_${lower}s[] =/;
		s/\\\\//g;
		s/}$/{ 0 } };/;
		p;
	};" $1

	echo "size_t ${tok}_default_n${lower}s = \
		((sizeof(${tok}_default_${lower}s) / \
		sizeof(${tok}_default_${lower}s[0])) - 1);"
done