lib/strndup.c

   1 /* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   2
   3 NOTE: The canonical source of this file is maintained with the GNU C Library.
   4 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
   5
   6 This program is free software; you can redistribute it and/or modify it
   7 under the terms of the GNU General Public License as published by the
   8 Free Software Foundation; either version 2, or (at your option) any
   9 later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software Foundation,
  18 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 # include "config.h"
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <sys/types.h>
  26
  27 #ifdef STDC_HEADERS
  28 # include <string.h>
  29 # include <stdlib.h>
  30 #else
  31 char *malloc ();
  32 #endif
  33
  34 /* Duplicate S, returning an identical malloc'd string.  */
  35 char *
  36 strndup (const char *s, size_t n)
  37 {
  38   char *new = malloc (n + 1);
  39
  40   if (new == NULL)
  41     return NULL;
  42
  43   new[n] = '\0';
  44   return (char *) memcpy (new, s, n);
  45 }