1  /* Iterate through the elements of an argz block.
       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  
      22  char *
      23  __argz_next (const char *argz, size_t argz_len, const char *entry)
      24  {
      25    if (entry)
      26      {
      27        if (entry < argz + argz_len)
      28  	entry = strchr (entry, '\0') + 1;
      29  
      30        return entry >= argz + argz_len ? NULL : (char *) entry;
      31      }
      32    else
      33      if (argz_len > 0)
      34        return (char *) argz;
      35      else
      36        return NULL;
      37  }
      38  libc_hidden_def (__argz_next)
      39  weak_alias (__argz_next, argz_next)
      40  libc_hidden_weak (argz_next)