| /* $OpenBSD: strlcat.c,v 1.8 2001/05/13 15:40:15 deraadt Exp $ */ |
| |
| /* |
| * Copyright (c) 1998, 2003-2005 Todd C. Miller <Todd.Miller@courtesan.com> |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include <sys/types.h> |
| #include <string.h> |
| |
| #include <config.h> |
| #include <compat.h> |
| |
| |
| /* |
| * Appends src to string dst of size siz (unlike strncat, siz is the |
| * full size of dst, not space left). At most siz-1 characters |
| * will be copied. Always NUL terminates (unless siz <= strlen(dst)). |
| * Returns strlen(src) + MIN(siz, strlen(initial dst)). |
| * If retval >= siz, truncation occurred. |
| */ |
| size_t |
| strlcat(dst, src, siz) |
| char *dst; |
| const char *src; |
| size_t siz; |
| { |
| char *d = dst; |
| const char *s = src; |
| size_t n = siz; |
| size_t dlen; |
| |
| /* Find the end of dst and adjust bytes left but don't go past end */ |
| while (n-- != 0 && *d != '\0') |
| d++; |
| dlen = d - dst; |
| n = siz - dlen; |
| |
| if (n == 0) |
| return(dlen + strlen(s)); |
| while (*s != '\0') { |
| if (n != 1) { |
| *d++ = *s; |
| n--; |
| } |
| s++; |
| } |
| *d = '\0'; |
| |
| return(dlen + (s - src)); /* count does not include NUL */ |
| } |