1/* Search for some characters in UTF-32 string.
2   Copyright (C) 1999, 2002, 2006, 2009-2010 Free Software Foundation, Inc.
3   Written by Bruno Haible <bruno@clisp.org>, 2002.
4
5   This program is free software: you can redistribute it and/or modify it
6   under the terms of the GNU Lesser 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 Lesser 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#define FUNC u32_strspn
24#define UNIT uint32_t
25#define U_STRCHR u32_strchr
26
27size_t
28FUNC (const UNIT *str, const UNIT *accept)
29{
30  /* Optimize two cases.  */
31  if (accept[0] == 0)
32    return 0;
33  if (accept[1] == 0)
34    {
35      ucs4_t uc = accept[0];
36      const UNIT *ptr = str;
37      for (; *ptr != 0; ptr++)
38        if (*ptr != uc)
39          break;
40      return ptr - str;
41    }
42  /* General case.  */
43  {
44    const UNIT *ptr = str;
45    for (; *ptr != 0; ptr++)
46      if (!U_STRCHR (accept, *ptr))
47        break;
48    return ptr - str;
49  }
50}
51