#! /usr/bin/perl # # Copyright (c) 2001-2025, 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 download site. # https://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)
use strict;
use warnings FATAL => 'all';
use convutils;
my $this_script = 'src/backend/utils/mb/Unicode/UCS_to_BIG5.pl';
# Load BIG5.TXT
my $all = &read_source("BIG5.TXT");
# Load CP950.TXT
my $cp950txt = &read_source("CP950.TXT");
foreach my $i (@$cp950txt)
{
my $code = $i->{code};
my $ucs = $i->{ucs};
# Pick only the ETEN extended characters in the range 0xf9d6 - 0xf9dc # from CP950.TXT if ( $code >= 0x80
&& $ucs >= 0x0080
&& $code >= 0xf9d6
&& $code <= 0xf9dc)
{
push @$all,
{
code => $code,
ucs => $ucs,
comment => $i->{comment},
direction => BOTH,
f => $i->{f},
l => $i->{l}
};
}
}
foreach my $i (@$all)
{
my $code = $i->{code};
my $ucs = $i->{ucs};
# BIG5.TXT maps several BIG5 characters to U+FFFD. The UTF-8 to BIG5 mapping can # contain only one of them. XXX: Doesn't really make sense to include any of them, # but for historical reasons, we map the first one of them. if ($i->{ucs} == 0xFFFD && $i->{code} != 0xA15A)
{
$i->{direction} = TO_UNICODE;
}
}
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