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Allow 4 bytes UTF-8 (UCS-4 range 00010000-001FFFFF)

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This is necessary to support JIS X 0213 <--> UTF-8 conversion.
This commit is contained in:
Tatsuo Ishii 2007-03-23 13:51:30 +00:00
parent 6b77e3a8cc
commit 4c35ec53a9
1 changed files with 11 additions and 4 deletions
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15
src/backend/utils/mb/Unicode/ucs2utf.pl
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@ -1,6 +1,8 @@
#
# $PostgreSQL: pgsql/src/backend/utils/mb/Unicode/ucs2utf.pl,v 1.2 2003/11/29 22:40:01 pgsql Exp $
# convert UCS-2 to UTF-8
# Copyright (c) 2001-2007, PostgreSQL Global Development Group
#
# $PostgreSQL: pgsql/src/backend/utils/mb/Unicode/ucs2utf.pl,v 1.3 2007/03/23 13:51:30 ishii Exp $
# convert UCS-4 to UTF-8
#
sub ucs2utf {
local($ucs) = @_;
@ -10,11 +12,16 @@ sub ucs2utf {
$utf = $ucs;
} elsif ($ucs > 0x007f && $ucs <= 0x07ff) {
$utf = (($ucs & 0x003f) | 0x80) | ((($ucs >> 6) | 0xc0) << 8);
} else {
} elsif ($ucs > 0x07ff && $ucs <= 0xffff) {
$utf = ((($ucs >> 12) | 0xe0) << 16) |
(((($ucs & 0x0fc0) >> 6) | 0x80) << 8) |
(($ucs & 0x003f) | 0x80);
}
} else {
$utf = ((($ucs >> 18) | 0xf0) << 24) |
(((($ucs & 0x3ffff) >> 12) | 0x80) << 16) |
(((($ucs & 0x0fc0) >> 6) | 0x80) << 8) |
(($ucs & 0x003f) | 0x80);
}
return($utf);
}
1;