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)