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/* Search for some characters in UTF-32 string.
Copyright (C) 1999, 2002, 2006, 2009-2022 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2002.
This file is free software.
It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
You can redistribute it and/or modify it under either
- the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version, or
- the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option)
any later version, or
- the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
This file 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 and the GNU General Public License
for more details.
You should have received a copy of the GNU Lesser General Public
License and of the GNU General Public License along with this
program. If not, see <https://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;
}
}
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