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  /* Delete ENTRY from ARGZ & ARGZ_LEN, if any.  */
      24  void
      25  argz_delete (char **argz, size_t *argz_len, char *entry)
      26  {
      27    if (entry)
      28      /* Get rid of the old value for NAME.  */
      29      {
      30        size_t entry_len = strlen (entry) + 1;
      31        *argz_len -= entry_len;
      32        memmove (entry, entry + entry_len, *argz_len - (entry - *argz));
      33        if (*argz_len == 0)
      34  	{
      35  	  free (*argz);
      36  	  *argz = 0;
      37  	}
      38      }
      39  }
      40  libc_hidden_def (argz_delete)