sysdeps/generic/strsep.c

   1 /* Copyright (C) 1992, 1993 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <string.h>
  21
  22 char *
  23 DEFUN(strsep, (stringp, delim),
  24       char **stringp AND CONST char *delim)
  25 {
  26   char *begin, *end;
  27
  28   begin = *stringp + strspn (*stringp, delim);
  29   end = *stringp + strcspn (*stringp, delim);
  30
  31   if (end == *stringp)
  32     return NULL;
  33
  34   if (*end != '\0')
  35     *end++ = '\0';
  36   *stringp = end;
  37
  38   return begin;
  39 }