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Diffstat (limited to 'lib/unistr/u32-strspn.c')
-rw-r--r-- | lib/unistr/u32-strspn.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/lib/unistr/u32-strspn.c b/lib/unistr/u32-strspn.c new file mode 100644 index 0000000..6f80202 --- /dev/null +++ b/lib/unistr/u32-strspn.c @@ -0,0 +1,50 @@ +/* Search for some characters in UTF-32 string. + Copyright (C) 1999, 2002, 2006 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 <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +/* Specification. */ +#include "unistr.h" + +#define FUNC u32_strspn +#define UNIT uint32_t +#define U_STRCHR u32_strchr + +size_t +FUNC (const UNIT *str, const UNIT *accept) +{ + /* Optimize two cases. */ + if (accept[0] == 0) + return 0; + if (accept[1] == 0) + { + ucs4_t uc = accept[0]; + const UNIT *ptr = str; + for (; *ptr != 0; ptr++) + if (*ptr != uc) + break; + return ptr - str; + } + /* General case. */ + { + const UNIT *ptr = str; + for (; *ptr != 0; ptr++) + if (!U_STRCHR (accept, *ptr)) + break; + return ptr - str; + } +} |