wcsmbs/wcscspn.c

   1 /* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <wchar.h>
  21
  22
  23 /* Return the length of the maximum initial segment
  24    of WCS which contains only wide-characters not in REJECT.  */
  25 size_t
  26 wcscspn (wcs, reject)
  27      const wchar_t *wcs;
  28      const wchar_t *reject;
  29 {
  30   register size_t count = 0;
  31
  32   while (*wcs != L'\0')
  33     if (wcschr (reject, *wcs++) == NULL)
  34       ++count;
  35     else
  36       return count;
  37
  38   return count;
  39 }