| 1 | /* $OpenBSD: strlcat.c,v 1.8 2001/05/13 15:40:15 deraadt Exp $ */
|
|---|
| 2 |
|
|---|
| 3 | /*
|
|---|
| 4 | * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
|
|---|
| 5 | * All rights reserved.
|
|---|
| 6 | *
|
|---|
| 7 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 8 | * modification, are permitted provided that the following conditions
|
|---|
| 9 | * are met:
|
|---|
| 10 | * 1. Redistributions of source code must retain the above copyright
|
|---|
| 11 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 12 | * 2. Redistributions in binary form must reproduce the above copyright
|
|---|
| 13 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 14 | * documentation and/or other materials provided with the distribution.
|
|---|
| 15 | * 3. The name of the author may not be used to endorse or promote products
|
|---|
| 16 | * derived from this software without specific prior written permission.
|
|---|
| 17 | *
|
|---|
| 18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|---|
| 19 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|---|
| 20 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|---|
| 21 | * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|---|
| 22 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|---|
| 23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|---|
| 24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|---|
| 25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|---|
| 26 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|---|
| 27 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 28 | */
|
|---|
| 29 |
|
|---|
| 30 | /*
|
|---|
| 31 | * This version has been modified for inclusion in Samba.
|
|---|
| 32 | * It has been converted to ANSI C from old-style K&R C.
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #include <sys/types.h>
|
|---|
| 36 | #include <string.h>
|
|---|
| 37 |
|
|---|
| 38 | /*
|
|---|
| 39 | * Appends src to string dst of size siz (unlike strncat, siz is the
|
|---|
| 40 | * full size of dst, not space left). At most siz-1 characters
|
|---|
| 41 | * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
|
|---|
| 42 | * Returns strlen(src) + MIN(siz, strlen(initial dst)).
|
|---|
| 43 | * If retval >= siz, truncation occurred.
|
|---|
| 44 | */
|
|---|
| 45 | size_t
|
|---|
| 46 | smbw_strlcat(char *dst, const char *src, size_t siz)
|
|---|
| 47 | {
|
|---|
| 48 | char *d = dst;
|
|---|
| 49 | const char *s = src;
|
|---|
| 50 | size_t n = siz;
|
|---|
| 51 | size_t dlen;
|
|---|
| 52 |
|
|---|
| 53 | /* Find the end of dst and adjust bytes left but don't go past end */
|
|---|
| 54 | while (n-- != 0 && *d != '\0')
|
|---|
| 55 | d++;
|
|---|
| 56 | dlen = d - dst;
|
|---|
| 57 | n = siz - dlen;
|
|---|
| 58 |
|
|---|
| 59 | if (n == 0)
|
|---|
| 60 | return(dlen + strlen(s));
|
|---|
| 61 | while (*s != '\0') {
|
|---|
| 62 | if (n != 1) {
|
|---|
| 63 | *d++ = *s;
|
|---|
| 64 | n--;
|
|---|
| 65 | }
|
|---|
| 66 | s++;
|
|---|
| 67 | }
|
|---|
| 68 | *d = '\0';
|
|---|
| 69 |
|
|---|
| 70 | return(dlen + (s - src)); /* count does not include NUL */
|
|---|
| 71 | }
|
|---|
