libc/string/strndup.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program 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
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 char *strndup (const char *s, size_t n)
  24 {
  25         size_t len = n + 1;
  26         void *new = malloc (len);
  27
  28         if (new == NULL)
  29                 return NULL;
  30
  31         char *str = (char *) memcpy (new, s, len);
  32
  33         str[n] = '\0';
  34
  35         return str;
  36 }