glibc/string/argz-next.c

/* Iterate through the elements of an argz block.
   Copyright (C) 1995, 1996 Free Software Foundation, Inc.

   Written by Miles Bader <miles@gnu.ai.mit.edu>

   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. */

#include <argz.h>
#include <string.h>

char *
__argz_next (char *argz, size_t argz_len, const char *entry)
{
  if (entry)
    {
      if (entry < argz + argz_len)
	entry = strchr (entry, '\0') + 1;

      return entry >= argz + argz_len ? NULL : (char *) entry;
    }
  else
    if (argz_len > 0)
      return argz;
    else
      return NULL;
}
weak_alias (__argz_next, argz_next)