Annotation of prex/usr/lib/libc/string/strlcpy.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: strlcpy.c,v 1.10 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: * Copy src to string dst of size siz. At most siz-1 characters
24: * will be copied. Always NUL terminates (unless siz == 0).
25: * Returns strlen(src); if retval >= siz, truncation occurred.
26: */
27: size_t
28: strlcpy(char *dst, const char *src, size_t siz)
29: {
30: char *d = dst;
31: const char *s = src;
32: size_t n = siz;
33:
34: /* Copy as many bytes as will fit */
35: if (n != 0 && --n != 0) {
36: do {
37: if ((*d++ = *s++) == 0)
38: break;
39: } while (--n != 0);
40: }
41:
42: /* Not enough room in dst, add NUL and traverse rest of src */
43: if (n == 0) {
44: if (siz != 0)
45: *d = '\0'; /* NUL-terminate dst */
46: while (*s++)
47: ;
48: }
49:
50: return(s - src - 1); /* count does not include NUL */
51: }
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