/* Duplicate a bounded initial segment of a string, with out-of-memory
   checking.
   Copyright (C) 2003, 2006-2007, 2009-2013 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */
#include "xstrndup.h"

#include <string.h>
#include <stdlib.h>

#include "xalloc.h"

#if defined(_MSC_VER)
static char *
strndup(char const *s, size_t n)
{
	size_t len = strnlen(s, n);
	char *new = malloc(len + 1);

	if (new == NULL)
		return NULL;

	new[len] = '\0';
	return memcpy(new, s, len);
}
#endif

/* Return a newly allocated copy of at most N bytes of STRING.
   In other words, return a copy of the initial segment of length N of
   STRING.  */
char *
xstrndup (const char *string, size_t n)
{
  char *s = strndup (string, n);
  if (! s)
    xalloc_die ();
  return s;
}