176612Stshiozak/*- 2105761Stjr * Copyright (c) 1990, 1993 3105761Stjr * The Regents of the University of California. All rights reserved. 476612Stshiozak * 5105761Stjr * This code is derived from software contributed to Berkeley by 6105761Stjr * Chris Torek. 7105761Stjr * 876612Stshiozak * Redistribution and use in source and binary forms, with or without 976612Stshiozak * modification, are permitted provided that the following conditions 1076612Stshiozak * are met: 1176612Stshiozak * 1. Redistributions of source code must retain the above copyright 1276612Stshiozak * notice, this list of conditions and the following disclaimer. 1376612Stshiozak * 2. Redistributions in binary form must reproduce the above copyright 1476612Stshiozak * notice, this list of conditions and the following disclaimer in the 1576612Stshiozak * documentation and/or other materials provided with the distribution. 16251069Semaste * 3. Neither the name of the University nor the names of its contributors 17105761Stjr * may be used to endorse or promote products derived from this software 18105761Stjr * without specific prior written permission. 1976612Stshiozak * 20105761Stjr * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2176612Stshiozak * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2276612Stshiozak * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23105761Stjr * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2476612Stshiozak * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2576612Stshiozak * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2676612Stshiozak * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2776612Stshiozak * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2876612Stshiozak * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2976612Stshiozak * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3076612Stshiozak * SUCH DAMAGE. 3176612Stshiozak */ 3276612Stshiozak 33105842Stjr#if 0 34105842Stjr#if defined(LIBC_SCCS) && !defined(lint) 35105842Stjrstatic char sccsid[] = "@(#)strncpy.c 8.1 (Berkeley) 6/4/93"; 36105842Stjr#endif /* LIBC_SCCS and not lint */ 37105842Stjr#endif 3876612Stshiozak#include <sys/cdefs.h> 3986170Sobrien__FBSDID("$FreeBSD$"); 4076612Stshiozak 4176612Stshiozak#include <wchar.h> 4276612Stshiozak 43105761Stjr/* 44105761Stjr * Copy src to dst, truncating or null-padding to always copy n bytes. 45105761Stjr * Return dst. 46105761Stjr */ 4776612Stshiozakwchar_t * 48105761Stjrwcsncpy(wchar_t * __restrict dst, const wchar_t * __restrict src, size_t n) 4976612Stshiozak{ 50105761Stjr if (n != 0) { 51105761Stjr wchar_t *d = dst; 52105761Stjr const wchar_t *s = src; 5376612Stshiozak 54105761Stjr do { 55105761Stjr if ((*d++ = *s++) == L'\0') { 56105761Stjr /* NUL pad the remaining n-1 bytes */ 57105761Stjr while (--n != 0) 58105761Stjr *d++ = L'\0'; 59105761Stjr break; 60105761Stjr } 61105761Stjr } while (--n != 0); 6276612Stshiozak } 63105761Stjr return (dst); 64105761Stjr} 65