#!/usr/bin/perl

# The license applies to all software incorporated in the "Vovida
# Open Communication Application Library" except for those portions
# incorporating third party software specifically identified as being
# licensed under separate license.
# 
# 
# The Vovida Software License, Version 1.0 
# Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
# 
# 3. The names "VOCAL", "Vovida Open Communication Application Library",
#    and "Vovida Open Communication Application Library (VOCAL)" must
#    not be used to endorse or promote products derived from this
#    software without prior written permission. For written
#    permission, please contact vocal@vovida.org.
# 
# 4. Products derived from this software may not be called "VOCAL", nor
#    may "VOCAL" appear in their name, without prior written
#    permission of Vovida Networks, Inc.
# 
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
# NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
# NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
# IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
# DAMAGE.
# 
# ====================================================================
# 
# This software consists of voluntary contributions made by Vovida
# Networks, Inc. and many individuals on behalf of Vovida Networks,
# Inc.  For more information on Vovida Networks, Inc., please see
# <http://www.vovida.org/>.
# 
# 
# All third party licenses and copyright notices and other required
# legends also need to be complied with as well.
# 

require "getopts.pl";
&Getopts("o:");

if($opt_o) {
    $output_file = $opt_o;
} else {
    $output_file = "tokenGen";
}

open(OUTPUT_H, ">$output_file.h") or die "cannot open $ARGV[1] $!";
open(OUTPUT_CXX, ">$output_file.cxx") or die "cannot open $ARGV[1] $!";

$type{"Unknown"} = 1;
$type{"String"} = 1;
$type{"TableEnd"} = 1;


print OUTPUT_H "// this file is automatically generated!  do not edit\n\n";
print OUTPUT_CXX "// this file is automatically generated!  do not edit\n\n";
print OUTPUT_H <<END_INCLUDES
#include <map>
#include <string>
END_INCLUDES
  ;
print OUTPUT_CXX '#include "', "$output_file.h", '"', "\n";
print OUTPUT_CXX "\n";

$max_size = 256;

while(<>) {
    chomp;

    if(/^begin (\w+)/) {
	$struct_name = $1;
#	$output_last_header .= "extern struct TokenRecognizerTable recTable$struct_name;\n";
	$output_last_header .= "extern TokenRecognizer recognizer$struct_name;\n";

	print OUTPUT_CXX "struct TokenRecognizerTable recTable$struct_name", "[$max_size] =\n";
	print OUTPUT_CXX "{\n";
    } elsif(/^end/) {
	print OUTPUT_CXX "    { \"\", MgcpTokenTypeTableEnd }\n";
	print OUTPUT_CXX "};\n";

	print OUTPUT_CXX "TokenRecognizer recognizer$struct_name (recTable$struct_name);\n";

    } elsif(s/^token\s+//) {
    
	($name, $string) = split(/\s+/);

	if(!$type{$name}) {
	    $type{$name} = $string;
	} elsif($type{$name} ne $string) {
	    print STDERR "duplicate $name in token table with different string.\n";
	    exit -1;
	}

	print OUTPUT_CXX "    { \"$string\", MgcpTokenType$name },\n";
    }
}

print OUTPUT_H "enum MgcpTokenType\n";
print OUTPUT_H "{\n";

foreach(sort keys %type) {
    print OUTPUT_H "     MgcpTokenType$_,\n";
}
print OUTPUT_H "};\n";

print OUTPUT_H "\n";

print OUTPUT_H <<ENDL
struct TokenRecognizerTable
{
    char* string;
    MgcpTokenType type;
};

class TokenRecognizer
{
public:
    TokenRecognizer(struct TokenRecognizerTable* rootTable) {
	int i = 0;
	while(rootTable[i].type != MgcpTokenTypeTableEnd)
	{
	    myMap[rootTable[i].string] = rootTable[i].type;
	    i++;
	}
    };

    MgcpTokenType matchToken(const string& s) {
	return myMap[s];
    };

private:
    map<string, MgcpTokenType> myMap;
};

ENDL
  ;


print OUTPUT_H $output_last_header;
