1/* Copyright (C) 1996, 1997, 1998, 2001, 2002, 2003, 2005, 2006 Free 2 Software Foundation, Inc. 3 4 NOTE: The canonical source of this file is maintained with the GNU C Library. 5 Bugs can be reported to bug-glibc@prep.ai.mit.edu. 6 7 This program is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published by the 9 Free Software Foundation; either version 2, or (at your option) any 10 later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software Foundation, 19 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 20 21#ifdef HAVE_CONFIG_H 22# include <config.h> 23#endif 24#if !_LIBC 25# include "strndup.h" 26#endif 27 28#include <stdlib.h> 29#include <string.h> 30 31#if !_LIBC 32# include "strnlen.h" 33# ifndef __strnlen 34# define __strnlen strnlen 35# endif 36#endif 37 38#undef __strndup 39#if _LIBC 40# undef strndup 41#endif 42 43#ifndef weak_alias 44# define __strndup strndup 45#endif 46 47char * 48__strndup (s, n) 49 const char *s; 50 size_t n; 51{ 52 size_t len = __strnlen (s, n); 53 char *new = malloc (len + 1); 54 55 if (new == NULL) 56 return NULL; 57 58 new[len] = '\0'; 59 return memcpy (new, s, len); 60} 61#ifdef libc_hidden_def 62libc_hidden_def (__strndup) 63#endif 64#ifdef weak_alias 65weak_alias (__strndup, strndup) 66#endif 67