string/argz-append.c

   1 /* Routines for dealing with '\0' separated arg vectors.
   2    Copyright (C) 1995-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <argz.h>
  20 #include <string.h>
  21 #include <stdlib.h>
  22
  23 /* Add BUF, of length BUF_LEN to the argz vector in ARGZ & ARGZ_LEN.  */
  24 error_t
  25 __argz_append (char **argz, size_t *argz_len, const char *buf, size_t buf_len)
  26 {
  27   size_t new_argz_len = *argz_len + buf_len;
  28   char *new_argz = realloc (*argz, new_argz_len);
  29   if (new_argz)
  30     {
  31       memcpy (new_argz + *argz_len, buf, buf_len);
  32       *argz = new_argz;
  33       *argz_len = new_argz_len;
  34       return 0;
  35     }
  36   else
  37     return ENOMEM;
  38 }
  39 weak_alias (__argz_append, argz_append)
  40
  41 /* Add STR to the argz vector in ARGZ & ARGZ_LEN.  This should be moved into
  42    argz.c in libshouldbelibc.  */
  43 error_t
  44 __argz_add (char **argz, size_t *argz_len, const char *str)
  45 {
  46   return __argz_append (argz, argz_len, str, strlen (str) + 1);
  47 }
  48 weak_alias (__argz_add, argz_add)