/* strspn.c -- implement strspn() for those architectures without it
   Copyright (C) 2000 Gary V. Vaughan
  
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
  
   This program 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 General Public License for more details.
  
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#if HAVE_CONFIG_H
#  include <sic/config.h>
#endif

#include <sys/types.h>

#if HAVE_STRING_H
#  include <string.h>
#elif HAVE_STRINGS_H
#  include <strings.h>
#endif

#if !HAVE_STRCHR
#  ifndef strchr
#    define strchr index
#  endif
#endif

size_t
strspn (const char *string, const char *accept)
{
  size_t count = 0;
  while (strchr (accept, *string))
    {
      ++count, ++string;
    }

  return count;
}