1/* Conversion UTF-16 to UCS-4. 2 Copyright (C) 2001-2002, 2006-2007 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 2001. 4 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. 9 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 Lesser General Public License for more details. 14 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/>. */ 17 18#include <config.h> 19 20/* Specification. */ 21#include "unistr.h" 22 23#if HAVE_INLINE 24 25int 26u16_mbtouc_aux (ucs4_t *puc, const uint16_t *s, size_t n) 27{ 28 uint16_t c = *s; 29 30 if (c < 0xdc00) 31 { 32 if (n >= 2) 33 { 34 if (s[1] >= 0xdc00 && s[1] < 0xe000) 35 { 36 *puc = 0x10000 + ((c - 0xd800) << 10) + (s[1] - 0xdc00); 37 return 2; 38 } 39 /* invalid multibyte character */ 40 } 41 else 42 { 43 /* incomplete multibyte character */ 44 } 45 } 46 /* invalid multibyte character */ 47 *puc = 0xfffd; 48 return 1; 49} 50 51#endif 52