From 5144983d12f5e97ac7fef7a42f44e4fa1387dcf8 Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Sat, 24 Mar 2007 14:25:14 +0000 Subject: [PATCH] Move to here from utf16-ucs4.c. --- lib/unistr/u16-mbtouc-aux.c | 49 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 lib/unistr/u16-mbtouc-aux.c diff --git a/lib/unistr/u16-mbtouc-aux.c b/lib/unistr/u16-mbtouc-aux.c new file mode 100644 index 000000000..8cef32999 --- /dev/null +++ b/lib/unistr/u16-mbtouc-aux.c @@ -0,0 +1,49 @@ +/* Conversion UTF-16 to UCS-4. + Copyright (C) 2001-2002, 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" + +int +u16_mbtouc_aux (ucs4_t *puc, const uint16_t *s, size_t n) +{ + uint16_t c = *s; + + if (c < 0xdc00) + { + if (n >= 2) + { + if (s[1] >= 0xdc00 && s[1] < 0xe000) + { + *puc = 0x10000 + ((c - 0xd800) << 10) + (s[1] - 0xdc00); + return 2; + } + /* invalid multibyte character */ + } + else + { + /* incomplete multibyte character */ + } + } + /* invalid multibyte character */ + *puc = 0xfffd; + return 1; +} -- 2.11.0