/libfido2/openbsd-compat/strlcat.c
Line | Count | Source (jump to first uncovered line) |
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 | | /* OPENBSD ORIGINAL: lib/libc/string/strlcat.c */ |
20 | | |
21 | | #include "openbsd-compat.h" |
22 | | |
23 | | #if !defined(HAVE_STRLCAT) |
24 | | |
25 | | #include <sys/types.h> |
26 | | #include <string.h> |
27 | | |
28 | | /* |
29 | | * Appends src to string dst of size siz (unlike strncat, siz is the |
30 | | * full size of dst, not space left). At most siz-1 characters |
31 | | * will be copied. Always NUL terminates (unless siz <= strlen(dst)). |
32 | | * Returns strlen(src) + MIN(siz, strlen(initial dst)). |
33 | | * If retval >= siz, truncation occurred. |
34 | | */ |
35 | | size_t |
36 | | strlcat(char *dst, const char *src, size_t siz) |
37 | 46.3M | { |
38 | 46.3M | char *d = dst; |
39 | 46.3M | const char *s = src; |
40 | 46.3M | size_t n = siz; |
41 | 46.3M | size_t dlen; |
42 | | |
43 | | /* Find the end of dst and adjust bytes left but don't go past end */ |
44 | 1.25G | while (n-- != 0 && *d != '\0') |
45 | 1.20G | d++; |
46 | 46.3M | dlen = d - dst; |
47 | 46.3M | n = siz - dlen; |
48 | | |
49 | 46.3M | if (n == 0) |
50 | 0 | return(dlen + strlen(s)); |
51 | 203M | while (*s != '\0') { |
52 | 157M | if (n != 1) { |
53 | 157M | *d++ = *s; |
54 | 157M | n--; |
55 | 157M | } |
56 | 157M | s++; |
57 | 157M | } |
58 | 46.3M | *d = '\0'; |
59 | | |
60 | 46.3M | return(dlen + (s - src)); /* count does not include NUL */ |
61 | 46.3M | } |
62 | | |
63 | | #endif /* !defined(HAVE_STRLCAT) */ |