1 /* $OpenBSD: wcslcpy.c,v 1.4 2006/05/05 15:27:38 millert Exp $ */ 2 /* $NetBSD: wcslcpy.c,v 1.2 2001/01/03 14:33:02 lukem Exp $ */ 3 /* from OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp */ 4 5 /* 6 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/types.h> 33 #include <wchar.h> 34 35 /* 36 * Copy src to string dst of size siz. At most siz-1 characters 37 * will be copied. Always NUL terminates (unless siz == 0). 38 * Returns wcslen(src); if retval >= siz, truncation occurred. 39 */ 40 size_t 41 wcslcpy(wchar_t *dst, const wchar_t *src, size_t siz) 42 { 43 wchar_t *d = dst; 44 const wchar_t *s = src; 45 size_t n = siz; 46 47 /* Copy as many bytes as will fit */ 48 if (n != 0) { 49 while (--n != 0) { 50 if ((*d++ = *s++) == '\0') 51 break; 52 } 53 } 54 55 /* Not enough room in dst, add NUL and traverse rest of src */ 56 if (n == 0) { 57 if (siz != 0) 58 *d = '\0'; /* NUL-terminate dst */ 59 while (*s++) 60 ; 61 } 62 63 return(s - src - 1); /* count does not include NUL */ 64 } 65