glibc/string/strndup.c

57 lines
1.4 KiB
C

/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <sys/types.h>
#if defined _LIBC || defined STDC_HEADERS
# include <stdlib.h>
# include <string.h>
#else
char *malloc ();
#endif
#undef __strndup
#undef strndup
#ifndef weak_alias
# define __strndup strndup
#endif
char *
__strndup (s, n)
const char *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);
}
#ifdef weak_alias
weak_alias (__strndup, strndup)
#endif