summary refs log tree commit diff
path: root/wcsmbs/wcsspn.c
blob: 94c0bfec6a18ae8e80f49d432225c76ffcc3dc09 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
/* Copyright (C) 1995-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.

   The GNU C Library 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 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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 the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <wchar.h>


/* Return the length of the maximum initial segment
   of WCS which contains only wide-characters in ACCEPT.  */
size_t
wcsspn (wcs, accept)
     const wchar_t *wcs;
     const wchar_t *accept;
{
  const wchar_t *p;
  const wchar_t *a;
  size_t count = 0;

  for (p = wcs; *p != L'\0'; ++p)
    {
      for (a = accept; *a != L'\0'; ++a)
	if (*p == *a)
	  break;
      if (*a == L'\0')
	return count;
      else
	++count;
    }

  return count;
}
libc_hidden_def (wcsspn)