1 /* $OpenBSD: wcslcpy.c,v 1.5 2011/07/24 15:21:28 millert Exp $ */ 2 /* $NetBSD: wcslcpy.c,v 1.2 2001/01/03 14:33:02 lukem Exp $ */ 3 4 /* 5 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 #include <wchar.h> 22 23 /* 24 * Copy src to string dst of size siz. At most siz-1 characters 25 * will be copied. Always NUL terminates (unless siz == 0). 26 * Returns wcslen(src); if retval >= siz, truncation occurred. 27 */ 28 size_t 29 wcslcpy(wchar_t *dst, const wchar_t *src, size_t siz) 30 { 31 wchar_t *d = dst; 32 const wchar_t *s = src; 33 size_t n = siz; 34 35 /* Copy as many bytes as will fit */ 36 if (n != 0) { 37 while (--n != 0) { 38 if ((*d++ = *s++) == '\0') 39 break; 40 } 41 } 42 43 /* Not enough room in dst, add NUL and traverse rest of src */ 44 if (n == 0) { 45 if (siz != 0) 46 *d = '\0'; /* NUL-terminate dst */ 47 while (*s++) 48 ; 49 } 50 51 return(s - src - 1); /* count does not include NUL */ 52 } 53