string/argz-ctsep.c

   1 /* Copyright (C) 1996-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
   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 <errno.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24
  25 error_t
  26 __argz_create_sep (const char *string, int delim, char **argz, size_t *len)
  27 {
  28   size_t nlen = strlen (string) + 1;
  29
  30   if (nlen > 1)
  31     {
  32       const char *rp;
  33       char *wp;
  34
  35       *argz = (char *) malloc (nlen);
  36       if (*argz == NULL)
  37         return ENOMEM;
  38
  39       rp = string;
  40       wp = *argz;
  41       do
  42         if (*rp == delim)
  43           {
  44             if (wp > *argz && wp[-1] != '\0')
  45               *wp++ = '\0';
  46             else
  47               --nlen;
  48           }
  49         else
  50           *wp++ = *rp;
  51       while (*rp++ != '\0');
  52
  53       if (nlen == 0)
  54         {
  55           free (*argz);
  56           *argz = NULL;
  57           *len = 0;
  58         }
  59
  60       *len = nlen;
  61     }
  62   else
  63     {
  64       *argz = NULL;
  65       *len = 0;
  66     }
  67
  68   return 0;
  69 }
  70 weak_alias (__argz_create_sep, argz_create_sep)