1 /* Look at first character in UTF-16 string.
2 Copyright (C) 1999-2002, 2006-2007, 2009-2015 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2001.
5 This program is free software: you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #if defined IN_LIBUNISTRING
21 /* Tell unistr.h to declare u16_mbtouc as 'extern', not 'static inline'. */
22 # include "unistring-notinline.h"
31 u16_mbtouc (ucs4_t *puc, const uint16_t *s, size_t n)
35 if (c < 0xd800 || c >= 0xe000)
44 if (s[1] >= 0xdc00 && s[1] < 0xe000)
46 *puc = 0x10000 + ((c - 0xd800) << 10) + (s[1] - 0xdc00);
49 /* invalid multibyte character */
53 /* incomplete multibyte character */
56 /* invalid multibyte character */