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|
#! /usr/bin/perl
#
# Copyright (c) 2001-2011, PostgreSQL Global Development Group
#
# src/backend/utils/mb/Unicode/UCS_to_BIG5.pl
#
# Generate UTF-8 <--> BIG5 conversion tables from
# map files provided by Unicode organization.
# Unfortunately it is prohibited by the organization
# to distribute the map files. So if you try to use this script,
# you have to obtain the map files from the organization's ftp site.
# ftp://www.unicode.org/Public/MAPPINGS/
#
# Our "big5" comes from BIG5.TXT, with the addition of the characters
# in the range 0xf9d6-0xf9dc from CP950.TXT.
#
# BIG5.TXT format:
# BIG5 code in hex
# UCS-2 code in hex
# # and Unicode name (not used in this script)
#
# CP950.TXT format:
# CP950 code in hex
# UCS-2 code in hex
# # and Unicode name (not used in this script)
require "ucs2utf.pl";
#
# first, generate UTF8 --> BIG5 table
#
$in_file = "BIG5.TXT";
open( FILE, $in_file ) || die( "cannot open $in_file" );
reset 'array';
while( <FILE> ){
chop;
if( /^#/ ){
next;
}
( $c, $u, $rest ) = split;
$ucs = hex($u);
$code = hex($c);
if( $code >= 0x80 && $ucs >= 0x0080){
$utf = &ucs2utf($ucs);
if( $array{ $utf } ne "" ){
printf STDERR "Warning: duplicate UTF8: %04x\n",$ucs;
next;
}
$count++;
$array{ $utf } = $code;
}
}
close( FILE );
$in_file = "CP950.TXT";
open( FILE, $in_file ) || die( "cannot open $in_file" );
while( <FILE> ){
chop;
if( /^#/ ){
next;
}
( $c, $u, $rest ) = split;
$ucs = hex($u);
$code = hex($c);
# Pick only the ETEN extended characters in the range 0xf9d6 - 0xf9dc
# from CP950.TXT
if( $code >= 0x80 && $ucs >= 0x0080 &&
$code >= 0xf9d6 && $code <= 0xf9dc ){
$utf = &ucs2utf($ucs);
if( $array{ $utf } ne "" ){
printf STDERR "Warning: duplicate UTF8: %04x\n",$ucs;
next;
}
$count++;
$array{ $utf } = $code;
}
}
close( FILE );
$file = lc("utf8_to_big5.map");
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "static pg_utf_to_local ULmapBIG5[ $count ] = {\n";
for $index ( sort {$a <=> $b} keys( %array ) ){
$code = $array{ $index };
$count--;
if( $count == 0 ){
printf FILE " {0x%04x, 0x%04x}\n", $index, $code;
} else {
printf FILE " {0x%04x, 0x%04x},\n", $index, $code;
}
}
print FILE "};\n";
close(FILE);
#
# then generate BIG5 --> UTF8 table
#
$in_file = "BIG5.TXT";
open( FILE, $in_file ) || die( "cannot open $in_file" );
reset 'array';
while( <FILE> ){
chop;
if( /^#/ ){
next;
}
( $c, $u, $rest ) = split;
$ucs = hex($u);
$code = hex($c);
if( $code >= 0x80 && $ucs >= 0x0080){
$utf = &ucs2utf($ucs);
if( $array{ $utf } ne "" ){
printf STDERR "Warning: duplicate UTF8: %04x\n",$ucs;
next;
}
$count++;
$array{ $code } = $utf;
}
}
close( FILE );
$in_file = "CP950.TXT";
open( FILE, $in_file ) || die( "cannot open $in_file" );
while( <FILE> ){
chop;
if( /^#/ ){
next;
}
( $c, $u, $rest ) = split;
$ucs = hex($u);
$code = hex($c);
# Pick only the ETEN extended characters in the range 0xf9d6 - 0xf9dc
# from CP950.TXT
if( $code >= 0x80 && $ucs >= 0x0080 &&
$code >= 0xf9d6 && $code <= 0xf9dc ){
$utf = &ucs2utf($ucs);
if( $array{ $utf } ne "" ){
printf STDERR "Warning: duplicate UTF8: %04x\n",$ucs;
next;
}
$count++;
$array{ $code } = $utf;
}
}
close( FILE );
$file = lc("big5_to_utf8.map");
open( FILE, "> $file" ) || die( "cannot open $file" );
print FILE "static pg_local_to_utf LUmapBIG5[ $count ] = {\n";
for $index ( sort {$a <=> $b} keys( %array ) ){
$utf = $array{ $index };
$count--;
if( $count == 0 ){
printf FILE " {0x%04x, 0x%04x}\n", $index, $utf;
} else {
printf FILE " {0x%04x, 0x%04x},\n", $index, $utf;
}
}
print FILE "};\n";
close(FILE);
|
