1f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes/* $NetBSD: strxfrm.c,v 1.12 2012/06/25 22:32:46 abs Exp $ */ 2f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes 3f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes/*- 4f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * Copyright (c) 1990, 1993 5f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * The Regents of the University of California. All rights reserved. 6f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * 7f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * This code is derived from software contributed to Berkeley by 8f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * Chris Torek. 9f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * 10f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * Redistribution and use in source and binary forms, with or without 11f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * modification, are permitted provided that the following conditions 12f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * are met: 13f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * 1. Redistributions of source code must retain the above copyright 14f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * notice, this list of conditions and the following disclaimer. 15f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * 2. Redistributions in binary form must reproduce the above copyright 16f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * notice, this list of conditions and the following disclaimer in the 17f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * documentation and/or other materials provided with the distribution. 18f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * 3. Neither the name of the University nor the names of its contributors 19f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * may be used to endorse or promote products derived from this software 20f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * without specific prior written permission. 21f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * 22f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * SUCH DAMAGE. 33f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes */ 34f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes 35f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes#include <sys/cdefs.h> 36f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes#if defined(LIBC_SCCS) && !defined(lint) 37f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes#if 0 38f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughesstatic char sccsid[] = "@(#)strxfrm.c 8.1 (Berkeley) 6/4/93"; 39f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes#else 40f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes__RCSID("$NetBSD: strxfrm.c,v 1.12 2012/06/25 22:32:46 abs Exp $"); 41f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes#endif 42f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes#endif /* LIBC_SCCS and not lint */ 43f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes 44f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes#include <assert.h> 45f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes#include <string.h> 46f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes 47f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes/* 48f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * Transform src, storing the result in dst, such that 49f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * strcmp() on transformed strings returns what strcoll() 50f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * on the original untransformed strings would return. 51f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes */ 52f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughessize_t 53f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughesstrxfrm(char *dst, const char *src, size_t n) 54f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes{ 55f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes size_t srclen, copysize; 56f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes 57f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes _DIAGASSERT(src != NULL); 58f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes 59f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes /* 60f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes * Since locales are unimplemented, this is just a copy. 61f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes */ 62f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes srclen = strlen(src); 63f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes if (n != 0) { 64f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes _DIAGASSERT(dst != NULL); 65f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes copysize = srclen < n ? srclen : n - 1; 66f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes (void)memcpy(dst, src, copysize); 67f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes dst[copysize] = 0; 68f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes } 69f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes return (srclen); 70f8b3a920a895a53b207017249080087d562bd0d2Elliott Hughes} 71