Annotation of mandoc/compat_strlcat.c, Revision 1.2
1.2 ! kristaps 1: #ifdef HAVE_CONFIG_H
! 2: #include "config.h"
! 3: #endif
! 4:
1.1 kristaps 5: #ifdef HAVE_STRLCAT
6:
7: int dummy;
8:
9: #else
10:
11: /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
12:
13: /*
14: * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
15: *
16: * Permission to use, copy, modify, and distribute this software for any
17: * purpose with or without fee is hereby granted, provided that the above
18: * copyright notice and this permission notice appear in all copies.
19: *
20: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
21: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
22: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
23: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
24: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
25: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
26: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
27: */
28:
29: #include <sys/types.h>
30: #include <string.h>
31:
32: /*
33: * Appends src to string dst of size siz (unlike strncat, siz is the
34: * full size of dst, not space left). At most siz-1 characters
35: * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
36: * Returns strlen(src) + MIN(siz, strlen(initial dst)).
37: * If retval >= siz, truncation occurred.
38: */
39: size_t
40: strlcat(char *dst, const char *src, size_t siz)
41: {
42: char *d = dst;
43: const char *s = src;
44: size_t n = siz;
45: size_t dlen;
46:
47: /* Find the end of dst and adjust bytes left but don't go past end */
48: while (n-- != 0 && *d != '\0')
49: d++;
50: dlen = d - dst;
51: n = siz - dlen;
52:
53: if (n == 0)
54: return(dlen + strlen(s));
55: while (*s != '\0') {
56: if (n != 1) {
57: *d++ = *s;
58: n--;
59: }
60: s++;
61: }
62: *d = '\0';
63:
64: return(dlen + (s - src)); /* count does not include NUL */
65: }
66:
67: #endif
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