mes-m2/lib/string/argz-extract.c

/* -*-comment-start: "//";comment-end:""-*-
 * GNU Mes --- Maxwell Equations of Software
 * Copyright © 1995-2018 Free Software Foundation, Inc.
 * Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 *
 * This file is part of GNU Mes.
 *
 * GNU Mes 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 3 of the License, or (at
 * your option) any later version.
 *
 * GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
 */

/** Commentary:
    Taken from GNU C Library
    Routines for dealing with '\0' separated arg vectors.
    Written by Miles Bader <miles@gnu.org>
*/

#include <argz.h>

/* Puts pointers to each string in ARGZ, plus a terminating 0 element, into
   ARGV, which must be large enough to hold them all.  */
void
__argz_extract (char const *argz, size_t len, char **argv)
{
  __argz_extract_count (argz, len, argv);
}

size_t
__argz_extract_count (char const *argz, size_t len, char **argv)
{
  size_t count = 0;
  while (len > 0)
    {
      size_t part_len = strlen (argz);
      *argv++ = (char *) argz;
      argz += part_len + 1;
      len -= part_len + 1;
      count ++;
    }
  *argv = 0;
  return count;
}