string/argz-append.c

   1 /* Routines for dealing with '\0' separated arg vectors.
   2    Copyright (C) 1995-2017 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 Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <argz.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23
  24 /* Add BUF, of length BUF_LEN to the argz vector in ARGZ & ARGZ_LEN.  */
  25 error_t
  26 __argz_append (char **argz, size_t *argz_len, const char *buf, size_t buf_len)
  27 {
  28   size_t new_argz_len = *argz_len + buf_len;
  29   char *new_argz = realloc (*argz, new_argz_len);
  30   if (new_argz)
  31     {
  32       memcpy (new_argz + *argz_len, buf, buf_len);
  33       *argz = new_argz;
  34       *argz_len = new_argz_len;
  35       return 0;
  36     }
  37   else
  38     return ENOMEM;
  39 }
  40 weak_alias (__argz_append, argz_append)
  41
  42 /* Add STR to the argz vector in ARGZ & ARGZ_LEN.  This should be moved into
  43    argz.c in libshouldbelibc.  */
  44 error_t
  45 __argz_add (char **argz, size_t *argz_len, const char *str)
  46 {
  47   return __argz_append (argz, argz_len, str, strlen (str) + 1);
  48 }
  49 weak_alias (__argz_add, argz_add)