Annotation of prex/usr/lib/libc/string/strlcat.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
2:
3: /*
4: * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20: #include <string.h>
21:
22: /*
23: * Appends src to string dst of size siz (unlike strncat, siz is the
24: * full size of dst, not space left). At most siz-1 characters
25: * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
26: * Returns strlen(src) + MIN(siz, strlen(initial dst)).
27: * If retval >= siz, truncation occurred.
28: */
29: size_t
30: strlcat(char *dst, const char *src, size_t siz)
31: {
32: char *d = dst;
33: const char *s = src;
34: size_t n = siz;
35: size_t dlen;
36:
37: /* Find the end of dst and adjust bytes left but don't go past end */
38: while (n-- != 0 && *d != '\0')
39: d++;
40: dlen = d - dst;
41: n = siz - dlen;
42:
43: if (n == 0)
44: return(dlen + strlen(s));
45: while (*s != '\0') {
46: if (n != 1) {
47: *d++ = *s;
48: n--;
49: }
50: s++;
51: }
52: *d = '\0';
53:
54: return(dlen + (s - src)); /* count does not include NUL */
55: }
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