source: vendor/glibc/2.3.2/string/argz-append.c

/* Routines for dealing with '\0' separated arg vectors.
   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

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

/* Add BUF, of length BUF_LEN to the argz vector in ARGZ & ARGZ_LEN.  */
error_t
__argz_append (char **argz, size_t *argz_len, const char *buf, size_t buf_len)
{
  size_t new_argz_len = *argz_len + buf_len;
  char *new_argz = realloc (*argz, new_argz_len);
  if (new_argz)
    {
      memcpy (new_argz + *argz_len, buf, buf_len);
      *argz = new_argz;
      *argz_len = new_argz_len;
      return 0;
    }
  else
    return ENOMEM;
}
weak_alias (__argz_append, argz_append)

/* Add STR to the argz vector in ARGZ & ARGZ_LEN.  This should be moved into
   argz.c in libshouldbelibc.  */
error_t
__argz_add (char **argz, size_t *argz_len, const char *str)
{
  return __argz_append (argz, argz_len, str, strlen (str) + 1);
}
weak_alias (__argz_add, argz_add)