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glibc  2.9
wcsspn.c
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00001 /* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <wchar.h>
00021 
00022 
00023 /* Return the length of the maximum initial segment
00024    of WCS which contains only wide-characters in ACCEPT.  */
00025 size_t
00026 wcsspn (wcs, accept)
00027      const wchar_t *wcs;
00028      const wchar_t *accept;
00029 {
00030   register const wchar_t *p;
00031   register const wchar_t *a;
00032   register size_t count = 0;
00033 
00034   for (p = wcs; *p != L'\0'; ++p)
00035     {
00036       for (a = accept; *a != L'\0'; ++a)
00037        if (*p == *a)
00038          break;
00039       if (*a == L'\0')
00040        return count;
00041       else
00042        ++count;
00043     }
00044 
00045   return count;
00046 }
00047 libc_hidden_def (wcsspn)