/*
 * strspn.c -- return numbers of chars at start of string in a class
 * Copyright (C) 1987, 1990 Free Software Foundation, Inc.
 *
 * 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. 
 *
 * $Id: strspn.c,v 1.1 1995/03/14 12:22:48 tom Exp $
 * $Log: strspn.c,v $
 * Revision 1.1  1995/03/14  12:22:48  tom
 * Initial revision
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#if defined(HAVE_STRING_H)
#include <string.h>
#else
#include <strings.h>
#ifndef strchr
#define strchr index
#endif
#endif

int
strspn (str, class)
  char *str, *class;
{
  register char *st = str;

  while (*st && strchr (class, *st))
    ++st;
  return st - str;
}