Mercurial > gnulib
view lib/unistr/u16-check.c @ 40057:b06060465f09
maint: Run 'make update-copyright'
author | Paul Eggert <eggert@cs.ucla.edu> |
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date | Tue, 01 Jan 2019 00:25:11 +0100 |
parents | 10eb9086bea0 |
children |
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/* Check UTF-16 string. Copyright (C) 2002, 2006-2007, 2009-2019 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 Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #include <config.h> /* Specification. */ #include "unistr.h" const uint16_t * u16_check (const uint16_t *s, size_t n) { const uint16_t *s_end = s + n; while (s < s_end) { /* Keep in sync with unistr.h and u16-mbtouc-aux.c. */ uint16_t c = *s; if (c < 0xd800 || c >= 0xe000) { s++; continue; } if (c < 0xdc00) { if (s + 2 <= s_end && s[1] >= 0xdc00 && s[1] < 0xe000) { s += 2; continue; } } /* invalid or incomplete multibyte character */ return s; } return NULL; }