1 /* 2 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * from OpenBSD: strlcat.c,v 1.3 2000/11/24 11:10:02 itojun Exp 28 */ 29 30 #include <sys/cdefs.h> 31 #if defined(LIBC_SCCS) && !defined(lint) 32 __RCSID("$NetBSD: wcslcat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $"); 33 #endif /* LIBC_SCCS and not lint */ 34 #ifndef lint 35 static const char rcsid[] = 36 "$FreeBSD$"; 37 #endif 38 39 #include <sys/types.h> 40 #include <assert.h> 41 #include <wchar.h> 42 43 /* 44 * Appends src to string dst of size siz (unlike wcsncat, siz is the 45 * full size of dst, not space left). At most siz-1 characters 46 * will be copied. Always NUL terminates (unless siz == 0). 47 * Returns wcslen(initial dst) + wcslen(src); if retval >= siz, 48 * truncation occurred. 49 */ 50 size_t 51 wcslcat(dst, src, siz) 52 wchar_t *dst; 53 const wchar_t *src; 54 size_t siz; 55 { 56 wchar_t *d = dst; 57 const wchar_t *s = src; 58 size_t n = siz; 59 size_t dlen; 60 61 /* Find the end of dst and adjust bytes left but don't go past end */ 62 while (*d != '\0' && n-- != 0) 63 d++; 64 dlen = d - dst; 65 n = siz - dlen; 66 67 if (n == 0) 68 return(dlen + wcslen(s)); 69 while (*s != '\0') { 70 if (n != 1) { 71 *d++ = *s; 72 n--; 73 } 74 s++; 75 } 76 *d = '\0'; 77 78 return(dlen + (s - src)); /* count does not include NUL */ 79 } 80