80 lines
1.9 KiB
Perl
Executable File
80 lines
1.9 KiB
Perl
Executable File
#! /usr/bin/perl
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#
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# Copyright (c) 2001-2020, PostgreSQL Global Development Group
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#
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# src/backend/utils/mb/Unicode/UCS_to_BIG5.pl
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#
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# Generate UTF-8 <--> BIG5 conversion tables from
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# map files provided by Unicode organization.
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# Unfortunately it is prohibited by the organization
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# to distribute the map files. So if you try to use this script,
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# you have to obtain the map files from the organization's download site.
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# https://www.unicode.org/Public/MAPPINGS/
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#
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# Our "big5" comes from BIG5.TXT, with the addition of the characters
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# in the range 0xf9d6-0xf9dc from CP950.TXT.
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#
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# BIG5.TXT format:
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# BIG5 code in hex
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# UCS-2 code in hex
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# # and Unicode name (not used in this script)
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#
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# CP950.TXT format:
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# CP950 code in hex
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# UCS-2 code in hex
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# # and Unicode name (not used in this script)
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use strict;
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use warnings;
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use convutils;
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my $this_script = 'src/backend/utils/mb/Unicode/UCS_to_BIG5.pl';
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# Load BIG5.TXT
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my $all = &read_source("BIG5.TXT");
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# Load CP950.TXT
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my $cp950txt = &read_source("CP950.TXT");
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foreach my $i (@$cp950txt)
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{
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my $code = $i->{code};
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my $ucs = $i->{ucs};
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# Pick only the ETEN extended characters in the range 0xf9d6 - 0xf9dc
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# from CP950.TXT
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if ( $code >= 0x80
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&& $ucs >= 0x0080
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&& $code >= 0xf9d6
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&& $code <= 0xf9dc)
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{
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push @$all,
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{
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code => $code,
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ucs => $ucs,
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comment => $i->{comment},
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direction => BOTH,
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f => $i->{f},
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l => $i->{l}
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};
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}
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}
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foreach my $i (@$all)
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{
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my $code = $i->{code};
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my $ucs = $i->{ucs};
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# BIG5.TXT maps several BIG5 characters to U+FFFD. The UTF-8 to BIG5 mapping can
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# contain only one of them. XXX: Doesn't really make sense to include any of them,
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# but for historical reasons, we map the first one of them.
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if ($i->{ucs} == 0xFFFD && $i->{code} != 0xA15A)
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{
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$i->{direction} = TO_UNICODE;
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}
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}
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# Output
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print_conversion_tables($this_script, "BIG5", $all);
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