#! /usr/bin/perl
#
# Copyright (c) 2007, PostgreSQL Global Development Group
#
# $PostgreSQL: pgsql/src/backend/utils/mb/Unicode/UCS_to_EUC_JIS_2004.pl,v 1.1 2007/03/25 11:56:02 ishii Exp $
#
# Generate UTF-8 <--> EUC_JIS_2004 code conversion tables from
# "euc-jis-2004-std.txt" (http://x0213.org)

require "ucs2utf.pl";

$TEST = 1;

# first generate UTF-8 --> EUC_JIS_2004 table

$in_file = "euc-jis-2004-std.txt";

open( FILE, $in_file ) || die( "cannot open $in_file" );

reset 'array';
reset 'array1';
reset 'comment';
reset 'comment1';

while($line = <FILE> ){
	if ($line =~ /^0x(.*)[ \t]*U\+(.*)\+(.*)[ \t]*#(.*)$/) {
		$c = $1;
		$u1 = $2;
		$u2 = $3;
		$rest = "U+" . $u1 . "+" . $u2 . $4;
		$code = hex($c);
		$ucs = hex($u1);
		$utf1 = &ucs2utf($ucs);
		$ucs = hex($u2);
		$utf2 = &ucs2utf($ucs);
		$str = sprintf "%08x%08x", $utf1, $utf2;
		$array1{ $str } = $code;
		$comment1{ $str } = $rest;
		$count1++;
		next;
	} elsif ($line =~ /^0x(.*)[ \t]*U\+(.*)[ \t]*#(.*)$/) {
		$c = $1;
		$u = $2;
		$rest = "U+" . $u . $3;
	} else {
		next;
	}
	
	$ucs = hex($u);
	$code = hex($c);
	$utf = &ucs2utf($ucs);
	if( $array{ $utf } ne "" ){
		printf STDERR "Warning: duplicate UTF8: %04x\n",$ucs;
		next;
	}
	$count++;

	$array{ $utf } = $code;
	$comment{ $code } = $rest;
}
close( FILE );

$file = "utf8_to_euc_jis_2004.map";
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "/*\n";
print FILE " * This file was generated by UCS_to_EUC_JIS_2004.pl\n";
print FILE " */\n";
print FILE "static pg_utf_to_local ULmapEUC_JIS_2004[] = {\n";

for $index ( sort {$a <=> $b} keys( %array ) ){
	$code = $array{ $index };
	$count--;
	if( $count == 0 ){
		printf FILE "  {0x%08x, 0x%06x}	/* %s */\n", $index, $code, $comment{ $code };
	} else {
		printf FILE "  {0x%08x, 0x%06x},	/* %s */\n", $index, $code, $comment{ $code }; 
	}
}

print FILE "};\n";
close(FILE);

if ($TEST == 1) {
	$file1 = "utf8.data";
	$file2 = "euc_jis_2004.data";
	open( FILE1, "> $file1" ) || die( "cannot open $file1" );
	open( FILE2, "> $file2" ) || die( "cannot open $file2" );

	for $index ( sort {$a <=> $b} keys( %array ) ){
		$code = $array{ $index };
		if ($code > 0x00 && $code != 0x09 && $code != 0x0a && $code != 0x0d &&
			$code != 0x5c &&
			($code < 0x80 ||
			 ($code >= 0x8ea1 && $code <= 0x8efe) ||
			 ($code >= 0x8fa1a1 && $code <= 0x8ffefe) ||
			 ($code >= 0xa1a1 && $code <= 0x8fefe))) {
			for ($i = 3; $i >= 0; $i--) {
				$s = $i * 8;
				$mask = 0xff << $s;
				print FILE1 pack("C", ($index & $mask) >> $s) if $index & $mask;
				print FILE2 pack("C", ($code & $mask) >> $s) if $code & $mask;
			}
			print FILE1 "\n";
			print FILE2 "\n";
		}
	}
}

$file = "utf8_to_euc_jis_2004_combined.map";
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "/*\n";
print FILE " * This file was generated by UCS_to_EUC_JIS_2004.pl\n";
print FILE " */\n";
print FILE "static pg_utf_to_local_combined ULmapEUC_JIS_2004_combined[] = {\n";

for $index ( sort {$a cmp $b} keys( %array1 ) ){
	$code = $array1{ $index };
	$count1--;
	if( $count1 == 0 ){
		printf FILE "  {0x%s, 0x%s, 0x%06x}	/* %s */\n", substr($index, 0, 8), substr($index, 8, 8), $code, $comment1{ $index };
	} else {
		printf FILE "  {0x%s, 0x%s, 0x%06x},	/* %s */\n", substr($index, 0, 8), substr($index, 8, 8), $code, $comment1{ $index };
	}
}

print FILE "};\n";
close(FILE);

if ($TEST == 1) {
	for $index ( sort {$a cmp $b} keys( %array1 ) ){
		$code = $array1{ $index };
		if ($code > 0x00 && $code != 0x09 && $code != 0x0a && $code != 0x0d &&
			$code != 0x5c &&
			($code < 0x80 ||
			 ($code >= 0x8ea1 && $code <= 0x8efe) ||
			 ($code >= 0x8fa1a1 && $code <= 0x8ffefe) ||
			 ($code >= 0xa1a1 && $code <= 0x8fefe))) {
			
			$v1 = hex(substr($index, 0, 8));
			$v2 = hex(substr($index, 8, 8));

			for ($i = 3; $i >= 0; $i--) {
				$s = $i * 8;
				$mask = 0xff << $s;
				print FILE1 pack("C", ($v1 & $mask) >> $s) if $v1 & $mask;
				print FILE2 pack("C", ($code & $mask) >> $s) if $code & $mask;
			}
			for ($i = 3; $i >= 0; $i--) {
				$s = $i * 8;
				$mask = 0xff << $s;
				print FILE1 pack("C", ($v2 & $mask) >> $s) if $v2 & $mask;
			}
			print FILE1 "\n";
			print FILE2 "\n";
		}
	}
	close(FILE1);
	close(FILE2);
}

# then generate EUC_JIS_2004 --> UTF-8 table

$in_file = "euc-jis-2004-std.txt";

open( FILE, $in_file ) || die( "cannot open $in_file" );

reset 'array';
reset 'array1';
reset 'comment';
reset 'comment1';

while($line = <FILE> ){
	if ($line =~ /^0x(.*)[ \t]*U\+(.*)\+(.*)[ \t]*#(.*)$/) {
		$c = $1;
		$u1 = $2;
		$u2 = $3;
		$rest = "U+" . $u1 . "+" . $u2 . $4;
		$code = hex($c);
		$ucs = hex($u1);
		$utf1 = &ucs2utf($ucs);
		$ucs = hex($u2);
		$utf2 = &ucs2utf($ucs);
		$str = sprintf "%08x%08x", $utf1, $utf2;
		$array1{ $code } = $str;
		$comment1{ $code } = $rest;
		$count1++;
		next;
	} elsif ($line =~ /^0x(.*)[ \t]*U\+(.*)[ \t]*#(.*)$/) {
		$c = $1;
		$u = $2;
		$rest = "U+" . $u . $3;
	} else {
		next;
	}
	
	$ucs = hex($u);
	$code = hex($c);
	$utf = &ucs2utf($ucs);
	if( $array{ $code } ne "" ){
		printf STDERR "Warning: duplicate UTF8: %04x\n",$ucs;
		next;
	}
	$count++;

	$array{ $code } = $utf;
	$comment{ $utf } = $rest;
}
close( FILE );

$file = "euc_jis_2004_to_utf8.map";
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "/*\n";
print FILE " * This file was generated by UCS_to_EUC_JIS_2004.pl\n";
print FILE " */\n";
print FILE "static pg_local_to_utf LUmapEUC_JIS_2004[] = {\n";

for $index ( sort {$a <=> $b} keys( %array ) ){
	$code = $array{ $index };
	$count--;
	if( $count == 0 ){
		printf FILE "  {0x%06x, 0x%08x}	/* %s */\n", $index, $code, $comment{ $code };
	} else {
		printf FILE "  {0x%06x, 0x%08x},	/* %s */\n", $index, $code, $comment{ $code }; 
	}
}

print FILE "};\n";
close(FILE);

$file = "euc_jis_2004_to_utf8_combined.map";
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "/*\n";
print FILE " * This file was generated by UCS_to_EUC_JIS_2004.pl\n";
print FILE " */\n";
print FILE "static pg_local_to_utf_combined LUmapEUC_JIS_2004_combined[] = {\n";

for $index ( sort {$a <=> $b} keys( %array1 ) ){
	$code = $array1{ $index };
	$count1--;
	if( $count1 == 0 ){
		printf FILE "  {0x%06x, 0x%s, 0x%s}	/* %s */\n", $index, substr($code, 0, 8), substr($code, 8, 8), $comment1{ $index };
	} else {
		printf FILE "  {0x%06x, 0x%s, 0x%s},	/* %s */\n", $index, substr($code, 0, 8), substr($code, 8, 8), $comment1{ $index };
	}
}

print FILE "};\n";
close(FILE);