string/argz-append.c

   1 /* Routines for dealing with '\0' separated arg vectors.
   2    Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Miles Bader <miles@gnu.ai.mit.edu>
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <argz.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24
  25 /* Add BUF, of length BUF_LEN to the argz vector in ARGZ & ARGZ_LEN.  */
  26 error_t
  27 __argz_append (char **argz, size_t *argz_len, const char *buf, size_t buf_len)
  28 {
  29   size_t new_argz_len = *argz_len + buf_len;
  30   char *new_argz = realloc (*argz, new_argz_len);
  31   if (new_argz)
  32     {
  33       memcpy (new_argz + *argz_len, buf, buf_len);
  34       *argz = new_argz;
  35       *argz_len = new_argz_len;
  36       return 0;
  37     }
  38   else
  39     return ENOMEM;
  40 }
  41 weak_alias (__argz_append, argz_append)
  42
  43 /* Add STR to the argz vector in ARGZ & ARGZ_LEN.  This should be moved into
  44    argz.c in libshouldbelibc.  */
  45 error_t
  46 __argz_add (char **argz, size_t *argz_len, const char *str)
  47 {
  48   return __argz_append (argz, argz_len, str, strlen (str) + 1);
  49 }
  50 weak_alias (__argz_add, argz_add)