Mercurial > gnulib
changeset 28209:0c822c91e517
Move to here from ucs4-utf16.c.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 24 Mar 2007 14:25:48 +0000 |
parents | b6e86fa51427 |
children | f7d7b1466e6f |
files | lib/unistr/u16-uctomb-aux.c |
diffstat | 1 files changed, 60 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lib/unistr/u16-uctomb-aux.c Sat Mar 24 14:25:48 2007 +0000 @@ -0,0 +1,60 @@ +/* Conversion UCS-4 to UTF-16. + Copyright (C) 2002, 2006-2007 Free Software Foundation, Inc. + Written by Bruno Haible <bruno@clisp.org>, 2002. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU Library General Public License as published + by the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + USA. */ + +#include <config.h> + +/* Specification. */ +#include "unistr.h" + +int +u16_uctomb_aux (uint16_t *s, ucs4_t uc, int n) +{ + if (uc < 0xd800) + { + /* The case n >= 1 is already handled by the caller. */ + } + else if (uc < 0x10000) + { + if (uc >= 0xe000) + { + if (n >= 1) + { + s[0] = uc; + return 1; + } + } + else + return -1; + } + else + { + if (uc < 0x110000) + { + if (n >= 2) + { + s[0] = 0xd800 + ((uc - 0x10000) >> 10); + s[1] = 0xdc00 + ((uc - 0x10000) & 0x3ff); + return 2; + } + } + else + return -1; + } + return -2; +}