#! /usr/bin/perl
#
# Copyright (c) 2007-2012, PostgreSQL Global Development Group
#
# src/backend/utils/mb/Unicode/UCS_to_SHIFT_JIS_2004.pl
#
# Generate UTF-8 <--> SHIFT_JIS_2004 code conversion tables from
# "sjis-0213-2004-std.txt" (http://x0213.org)

require "ucs2utf.pl";

# first generate UTF-8 --> SHIFT_JIS_2004 table

$in_file = "sjis-0213-2004-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{ $utf } ne "" ){
		printf STDERR "Warning: duplicate UTF8: %08x UCS: %04x Shift JIS: %04x\n",$utf, $ucs, $code;
		next;
	}
	$count++;

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

$file = "utf8_to_shift_jis_2004.map";
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "/*\n";
print FILE " * This file was generated by UCS_to_SHIFT_JIS_2004.pl\n";
print FILE " */\n";
print FILE "static pg_utf_to_local ULmapSHIFT_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);

$file = "utf8_to_shift_jis_2004_combined.map";
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "/*\n";
print FILE " * This file was generated by UCS_to_SHIFT_JIS_2004.pl\n";
print FILE " */\n";
print FILE "static pg_utf_to_local_combined ULmapSHIFT_JIS_2004_combined[] = {\n";

for $index ( sort {$a cmp $b} keys( %array1 ) ){
	$code = $array1{ $index };
	$count1--;
	if( $count1 == 0 ){
		printf FILE "  {0x%s, 0x%s, 0x%04x}	/* %s */\n", substr($index, 0, 8), substr($index, 8, 8), $code, $comment1{ $index };
	} else {
		printf FILE "  {0x%s, 0x%s, 0x%04x},	/* %s */\n", substr($index, 0, 8), substr($index, 8, 8), $code, $comment1{ $index };
	}
}

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

# then generate SHIFT_JIS_2004 --> UTF-8 table

$in_file = "sjis-0213-2004-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{ $code } ne "" ){
		printf STDERR "Warning: duplicate UTF-8: %08x UCS: %04x Shift JIS: %04x\n",$utf, $ucs, $code;
		printf STDERR "Previous value: UTF-8: %08x\n", $array{ $utf };
		next;
	}
	$count++;

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

$file = "shift_jis_2004_to_utf8.map";
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "/*\n";
print FILE " * This file was generated by UCS_to_SHIFTJIS_2004.pl\n";
print FILE " */\n";
print FILE "static pg_local_to_utf LUmapSHIFT_JIS_2004[] = {\n";

for $index ( sort {$a <=> $b} keys( %array ) ){
	$code = $array{ $index };
	$count--;
	if( $count == 0 ){
		printf FILE "  {0x%04x, 0x%08x}	/* %s */\n", $index, $code, $comment{ $code };
	} else {
		printf FILE "  {0x%04x, 0x%08x},	/* %s */\n", $index, $code, $comment{ $code };
	}
}

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

$file = "shift_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_SHIFT_JIS_2004.pl\n";
print FILE " */\n";
print FILE "static pg_local_to_utf_combined LUmapSHIFT_JIS_2004_combined[] = {\n";

for $index ( sort {$a <=> $b} keys( %array1 ) ){
	$code = $array1{ $index };
	$count1--;
	if( $count1 == 0 ){
		printf FILE "  {0x%04x, 0x%s, 0x%s}	/* %s */\n", $index, substr($code, 0, 8), substr($code, 8, 8), $comment1{ $index };
	} else {
		printf FILE "  {0x%04x, 0x%s, 0x%s},	/* %s */\n", $index, substr($code, 0, 8), substr($code, 8, 8), $comment1{ $index };
	}
}

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