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stpncpy.c revision 1.1.2.2 
      1  1.1.2.2  jym /*	$NetBSD: stpncpy.c,v 1.1.2.2 2009/05/13 19:18:27 jym Exp $	*/
      2  1.1.2.2  jym 
      3  1.1.2.2  jym /*-
      4  1.1.2.2  jym  * Copyright (c) 2009 David Schultz <das (at) FreeBSD.org>
      5  1.1.2.2  jym  * All rights reserved.
      6  1.1.2.2  jym  *
      7  1.1.2.2  jym  * Redistribution and use in source and binary forms, with or without
      8  1.1.2.2  jym  * modification, are permitted provided that the following conditions
      9  1.1.2.2  jym  * are met:
     10  1.1.2.2  jym  * 1. Redistributions of source code must retain the above copyright
     11  1.1.2.2  jym  *    notice, this list of conditions and the following disclaimer.
     12  1.1.2.2  jym  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1.2.2  jym  *    notice, this list of conditions and the following disclaimer in the
     14  1.1.2.2  jym  *    documentation and/or other materials provided with the distribution.
     15  1.1.2.2  jym  *
     16  1.1.2.2  jym  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  1.1.2.2  jym  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  1.1.2.2  jym  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  1.1.2.2  jym  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  1.1.2.2  jym  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  1.1.2.2  jym  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  1.1.2.2  jym  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  1.1.2.2  jym  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  1.1.2.2  jym  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.1.2.2  jym  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.1.2.2  jym  * SUCH DAMAGE.
     27  1.1.2.2  jym  */
     28  1.1.2.2  jym 
     29  1.1.2.2  jym #include <sys/cdefs.h>
     30  1.1.2.2  jym #if defined(LIBC_SCCS) && !defined(lint)
     31  1.1.2.2  jym __RCSID("$NetBSD: stpncpy.c,v 1.1.2.2 2009/05/13 19:18:27 jym Exp $");
     32  1.1.2.2  jym #endif /* LIBC_SCCS and not lint */
     33  1.1.2.2  jym /* FreeBSD: src/lib/libc/string/stpncpy.c,v 1.1 2009/02/28 06:00:58 das Exp */
     34  1.1.2.2  jym 
     35  1.1.2.2  jym #include <string.h>
     36  1.1.2.2  jym 
     37  1.1.2.2  jym char *
     38  1.1.2.2  jym stpncpy(char * __restrict dst, const char * __restrict src, size_t n)
     39  1.1.2.2  jym {
     40  1.1.2.2  jym 
     41  1.1.2.2  jym 	for (; n--; dst++, src++) {
     42  1.1.2.2  jym 		if (!(*dst = *src)) {
     43  1.1.2.2  jym 			char *ret = dst;
     44  1.1.2.2  jym 			while (n--)
     45  1.1.2.2  jym 				*++dst = '\0';
     46  1.1.2.2  jym 			return (ret);
     47  1.1.2.2  jym 		}
     48  1.1.2.2  jym 	}
     49  1.1.2.2  jym 	return (dst);
     50  1.1.2.2  jym }
     51