wcslcat.c revision 267654
11539Srgrimes/* 21539Srgrimes * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 31539Srgrimes * All rights reserved. 41539Srgrimes * 51539Srgrimes * Redistribution and use in source and binary forms, with or without 61539Srgrimes * modification, are permitted provided that the following conditions 71539Srgrimes * are met: 81539Srgrimes * 1. Redistributions of source code must retain the above copyright 91539Srgrimes * notice, this list of conditions and the following disclaimer. 101539Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111539Srgrimes * notice, this list of conditions and the following disclaimer in the 121539Srgrimes * documentation and/or other materials provided with the distribution. 131539Srgrimes * 3. The name of the author may not be used to endorse or promote products 141539Srgrimes * derived from this software without specific prior written permission. 151539Srgrimes * 161539Srgrimes * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 171539Srgrimes * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 181539Srgrimes * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 191539Srgrimes * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 201539Srgrimes * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 211539Srgrimes * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 221539Srgrimes * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 231539Srgrimes * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 241539Srgrimes * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 251539Srgrimes * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 261539Srgrimes * 271539Srgrimes * from OpenBSD: strlcat.c,v 1.3 2000/11/24 11:10:02 itojun Exp 281539Srgrimes */ 291539Srgrimes 301539Srgrimes#include <sys/cdefs.h> 311539Srgrimes#if 0 321539Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 331539Srgrimes__RCSID("$NetBSD: wcslcat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $"); 341539Srgrimes#endif /* LIBC_SCCS and not lint */ 358858Srgrimes#endif 361539Srgrimes__FBSDID("$FreeBSD: releng/9.3/lib/libc/string/wcslcat.c 188080 2009-02-03 17:58:20Z danger $"); 371539Srgrimes 381539Srgrimes#include <sys/types.h> 391539Srgrimes#include <wchar.h> 401539Srgrimes 411539Srgrimes/* 428858Srgrimes * Appends src to string dst of size siz (unlike wcsncat, siz is the 431539Srgrimes * full size of dst, not space left). At most siz-1 characters 441539Srgrimes * will be copied. Always NUL terminates (unless siz == 0). 451539Srgrimes * Returns wcslen(initial dst) + wcslen(src); if retval >= siz, 461539Srgrimes * truncation occurred. 471539Srgrimes */ 481539Srgrimessize_t 491539Srgrimeswcslcat(wchar_t *dst, const wchar_t *src, size_t siz) 501539Srgrimes{ 511539Srgrimes wchar_t *d = dst; 521539Srgrimes const wchar_t *s = src; 531539Srgrimes size_t n = siz; 541539Srgrimes size_t dlen; 5536888Speter 5636888Speter /* Find the end of dst and adjust bytes left but don't go past end */ 5736888Speter while (*d != '\0' && n-- != 0) 5850473Speter d++; 5936888Speter dlen = d - dst; 6036888Speter n = siz - dlen; 611539Srgrimes 621539Srgrimes if (n == 0) 631539Srgrimes return(dlen + wcslen(s)); 6484463Sbde while (*s != '\0') { 65102227Smike if (n != 1) { 6621055Speter *d++ = *s; 67102227Smike n--; 68102227Smike } 69102227Smike s++; 7072510Sume } 7172510Sume *d = '\0'; 72102227Smike 73102227Smike return(dlen + (s - src)); /* count does not include NUL */ 74102227Smike} 7584463Sbde