86 lines
2.3 KiB
Perl
Executable File
86 lines
2.3 KiB
Perl
Executable File
#! /usr/bin/perl
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#
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# Copyright (c) 2007-2020, PostgreSQL Global Development Group
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#
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# src/backend/utils/mb/Unicode/UCS_to_GB18030.pl
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#
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# Generate UTF-8 <--> GB18030 code conversion tables from
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# "gb-18030-2000.xml", obtained from
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# http://source.icu-project.org/repos/icu/data/trunk/charset/data/xml/
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#
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# The lines we care about in the source file look like
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# <a u="009A" b="81 30 83 36"/>
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# where the "u" field is the Unicode code point in hex,
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# and the "b" field is the hex byte sequence for GB18030
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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_EUC_CN.pl';
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# Read the input
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my $in_file = "gb-18030-2000.xml";
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open(my $in, '<', $in_file) || die("cannot open $in_file");
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my @mapping;
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while (<$in>)
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{
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next if (!m/<a u="([0-9A-F]+)" b="([0-9A-F ]+)"/);
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my ($u, $c) = ($1, $2);
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$c =~ s/ //g;
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my $ucs = hex($u);
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my $code = hex($c);
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# The GB-18030 character set, which we use as the source, contains
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# a lot of extra characters on top of the GB2312 character set that
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# EUC_CN encodes. Filter out those extra characters.
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next if (($code & 0xFF) < 0xA1);
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next
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if (
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!( $code >= 0xA100 && $code <= 0xA9FF
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|| $code >= 0xB000 && $code <= 0xF7FF));
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next if ($code >= 0xA2A1 && $code <= 0xA2B0);
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next if ($code >= 0xA2E3 && $code <= 0xA2E4);
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next if ($code >= 0xA2EF && $code <= 0xA2F0);
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next if ($code >= 0xA2FD && $code <= 0xA2FE);
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next if ($code >= 0xA4F4 && $code <= 0xA4FE);
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next if ($code >= 0xA5F7 && $code <= 0xA5FE);
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next if ($code >= 0xA6B9 && $code <= 0xA6C0);
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next if ($code >= 0xA6D9 && $code <= 0xA6FE);
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next if ($code >= 0xA7C2 && $code <= 0xA7D0);
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next if ($code >= 0xA7F2 && $code <= 0xA7FE);
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next if ($code >= 0xA8BB && $code <= 0xA8C4);
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next if ($code >= 0xA8EA && $code <= 0xA8FE);
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next if ($code >= 0xA9A1 && $code <= 0xA9A3);
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next if ($code >= 0xA9F0 && $code <= 0xA9FE);
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next if ($code >= 0xD7FA && $code <= 0xD7FE);
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# A couple of characters are mapped differently from GB-2312 or GB-18030
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if ($code == 0xA1A4)
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{
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$ucs = 0x30FB;
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}
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if ($code == 0xA1AA)
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{
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$ucs = 0x2015;
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}
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push @mapping,
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{
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ucs => $ucs,
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code => $code,
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direction => BOTH,
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f => $in_file,
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l => $.
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};
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}
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close($in);
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print_conversion_tables($this_script, "EUC_CN", \@mapping);
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