#!/usr/bin/perl
#
# make-reg.pl
# Registration Macros Generator
#
# (c) 2006, Luis E. Garcia Onatnon <luis.ontanon@gmail.com>
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later

use strict;
use Getopt::Long;

my @classes = ();
my @functions = ();
my @internal_functions = ();
my $source_dir = "";

GetOptions('dir=s' => \$source_dir);

my $filename;
while ($filename = $ARGV[0]) {
	shift;

	if ($source_dir and ! -e $filename) {
		$filename = $source_dir . '/' . $filename;
	}

	open FILE, $filename or warn "Couldn't open file $filename: $!";

	while (<FILE>) {
		push @classes, $1 if /WSLUA_CLASS_DEFINE(?:_BASE)?\050\s*([A-Za-z0-9]+)/;
		push @functions, $1 if /WSLUA_FUNCTION\s+wslua_([a-z_0-9]+)/;
		push @internal_functions, $1 if /WSLUA_INTERNAL_FUNCTION\s+wslua_([a-z_0-9]+)/;
	}
}

open C, ">register_wslua.c";
open H, ">declare_wslua.h";

print H "/* This file is automatically generated by make-reg.pl; do not edit! */\n\n";
print C "/* This file is automatically generated by make-reg.pl; do not edit! */\n\n";

print H "#define WSLUA_DECLARE_CLASSES() \\\n";
for (@classes) {
	print H "\tWSLUA_CLASS_DECLARE($_);\\\n"
}
print H "\n\n";

print H "#define WSLUA_DECLARE_FUNCTIONS() \\\n";
for (@functions) {
	print H "\tWSLUA_FUNCTION wslua_$_(lua_State* L);\\\n"
}
for (@internal_functions) {
	print H "\tWSLUA_INTERNAL_FUNCTION wslua_$_(lua_State* L);\\\n"
}
print H "\n\n";
print H "extern void wslua_register_classes(lua_State* L);\n";
print H "extern void wslua_register_functions(lua_State* L);\n";
print H "\n\n";

print C '#include "config.h"' . "\n";

print C '#include "wslua.h"' . "\n\n";
print C '#include "lua_bitop.h"' . "\n\n";

print C "static void wslua_reg_module(lua_State* L, const char *name _U_, lua_CFunction func) { \n";
print C "\tlua_pushcfunction(L, func);\n";
# why was this done?  this string was never used for anything - I'll keep the argument "name" above
# just in case this needs to be reverted someday, but I think this thing's from old code or something
# print C "\tlua_pushstring(L, name);\n";
# print C "\tlua_call(L, 1, 0);\n";
print C "\tlua_call(L, 0, 0);\n";
print C "}\n\n";
print C "void wslua_register_classes(lua_State* L) { \n";
for (@classes) {
	print C "\twslua_reg_module(L, \"${_}\", ${_}_register);\n";
}
print C "\twslua_reg_module(L, \"bit\", luaopen_bit);\n";
print C "\twslua_reg_module(L, \"GRegex\", luaopen_rex_glib);\n";
print C "}\n\n";


print C "void wslua_register_functions(lua_State* L) {\n";
for (@functions) {
	print C "\tWSLUA_REGISTER_FUNCTION($_); \n"
}
for (@internal_functions) {
	print C "\tWSLUA_REGISTER_FUNCTION($_); \n"
}
print C "}\n\n";

close H;
close C;
