From: Bruno Haible Date: Sun, 28 Jan 2007 02:00:40 +0000 (+0000) Subject: Move to here from u16-mbtouc.c. X-Git-Tag: cvs-readonly~1203 X-Git-Url: http://erislabs.net/gitweb/?a=commitdiff_plain;h=8b7c54dbe5d3ecbc21204680e053a4b9aea43c8f;p=gnulib.git Move to here from u16-mbtouc.c. --- diff --git a/lib/unistr/u16-mbtouc-unsafe.c b/lib/unistr/u16-mbtouc-unsafe.c new file mode 100644 index 000000000..bc1014a3c --- /dev/null +++ b/lib/unistr/u16-mbtouc-unsafe.c @@ -0,0 +1,62 @@ +/* Look at first character in UTF-16 string. + Copyright (C) 1999-2002, 2006-2007 Free Software Foundation, Inc. + Written by Bruno Haible , 2001. + + 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 + +/* Specification. */ +#include "unistr.h" + +#if !HAVE_INLINE + +int +u16_mbtouc_unsafe (ucs4_t *puc, const uint16_t *s, size_t n) +{ + uint16_t c = *s; + + if (c < 0xd800 || c >= 0xe000) + { + *puc = c; + return 1; + } +#if CONFIG_UNICODE_SAFETY + if (c < 0xdc00) +#endif + { + if (n >= 2) + { +#if CONFIG_UNICODE_SAFETY + if (s[1] >= 0xdc00 && s[1] < 0xe000) +#endif + { + *puc = 0x10000 + ((c - 0xd800) << 10) + (s[1] - 0xdc00); + return 2; + } + /* invalid multibyte character */ + } + else + { + /* incomplete multibyte character */ + } + } + /* invalid multibyte character */ + *puc = 0xfffd; + return 1; +} + +#endif