Branch data Line data Source code
1 : : /* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert 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/strlcpy.c */
20 : :
21 : : #include "includes.h"
22 : : #ifndef HAVE_STRLCPY
23 : :
24 : : #include <sys/types.h>
25 : : #include <string.h>
26 : :
27 : : /*
28 : : * Copy src to string dst of size siz. At most siz-1 characters
29 : : * will be copied. Always NUL terminates (unless siz == 0).
30 : : * Returns strlen(src); if retval >= siz, truncation occurred.
31 : : */
32 : : size_t
33 : 230666 : strlcpy(char *dst, const char *src, size_t siz)
34 : : {
35 : 230666 : char *d = dst;
36 : 230666 : const char *s = src;
37 : 230666 : size_t n = siz;
38 : :
39 : : /* Copy as many bytes as will fit */
40 [ + - ]: 230666 : if (n != 0) {
41 [ + + ]: 15638034 : while (--n != 0) {
42 [ + + ]: 15659380 : if ((*d++ = *s++) == '\0')
43 : : break;
44 : : }
45 : : }
46 : :
47 : : /* Not enough room in dst, add NUL and traverse rest of src */
48 [ + + ]: 230666 : if (n == 0) {
49 [ + - ]: 209320 : if (siz != 0)
50 : 209320 : *d = '\0'; /* NUL-terminate dst */
51 [ - + ]: 209320 : while (*s++)
52 : : ;
53 : : }
54 : :
55 : 230666 : return(s - src - 1); /* count does not include NUL */
56 : : }
57 : :
58 : : #endif /* !HAVE_STRLCPY */
|