The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* $NetBSD: strlcat.c,v 1.5 1999/09/20 04:39:47 lukem Exp $ */ |
| 2 | /* from OpenBSD: strlcat.c,v 1.2 1999/06/17 16:28:58 millert Exp */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. The name of the author may not be used to endorse or promote products |
| 17 | * derived from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 20 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
| 21 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| 22 | * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 23 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 24 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 25 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 26 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 27 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 28 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #ifndef lint |
| 32 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 33 | "@(#) $Header: /tcpdump/master/tcpdump/missing/strlcat.c,v 1.5 2003-11-16 09:36:51 guy Exp $ (LBL)"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 34 | #endif |
| 35 | |
| 36 | #ifdef HAVE_CONFIG_H |
| 37 | #include <config.h> |
| 38 | #endif |
| 39 | |
| 40 | #include <tcpdump-stdinc.h> |
| 41 | |
| 42 | #include <string.h> |
| 43 | |
| 44 | /* |
| 45 | * Appends src to string dst of size siz (unlike strncat, siz is the |
| 46 | * full size of dst, not space left). At most siz-1 characters |
| 47 | * will be copied. Always NUL terminates (unless siz == 0). |
| 48 | * Returns strlen(src); if retval >= siz, truncation occurred. |
| 49 | */ |
| 50 | size_t |
| 51 | strlcat(char *dst, const char *src, size_t siz) |
| 52 | { |
| 53 | register char *d = dst; |
| 54 | register const char *s = src; |
| 55 | register size_t n = siz; |
| 56 | size_t dlen; |
| 57 | |
| 58 | /* Find the end of dst and adjust bytes left but don't go past end */ |
| 59 | while (*d != '\0' && n-- != 0) |
| 60 | d++; |
| 61 | dlen = d - dst; |
| 62 | n = siz - dlen; |
| 63 | |
| 64 | if (n == 0) |
| 65 | return(dlen + strlen(s)); |
| 66 | while (*s != '\0') { |
| 67 | if (n != 1) { |
| 68 | *d++ = *s; |
| 69 | n--; |
| 70 | } |
| 71 | s++; |
| 72 | } |
| 73 | *d = '\0'; |
| 74 | |
| 75 | return(dlen + (s - src)); /* count does not include NUL */ |
| 76 | } |