wcsmbs/wcscspn.c

   1 /* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3 Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>
   4
   5 The GNU C Library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 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 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, 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 }