lib/strcspn.c


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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

char *index ();

/* Return the length of the maximum inital segment of S
   which contains no characters from REJECT.  */
int
strcspn (s, reject)
     register char *s;
     register char *reject;
{
  register int count = 0;

  while (*s != '\0')
    if (index (reject, *s++) == 0)
      ++count;
    else
      return count;

  return count;
}