Annotation of mandoc/compat_strlcpy.c, Revision 1.5
1.5 ! schwarze 1: /* $Id$ */
1.1 kristaps 2: /* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */
3:
4: /*
5: * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
6: *
7: * Permission to use, copy, modify, and distribute this software for any
8: * purpose with or without fee is hereby granted, provided that the above
9: * copyright notice and this permission notice appear in all copies.
10: *
11: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18: */
1.5 ! schwarze 19: #include "config.h"
1.1 kristaps 20:
21: #include <sys/types.h>
22: #include <string.h>
23:
24: /*
25: * Copy src to string dst of size siz. At most siz-1 characters
26: * will be copied. Always NUL terminates (unless siz == 0).
27: * Returns strlen(src); if retval >= siz, truncation occurred.
28: */
29: size_t
30: strlcpy(char *dst, const char *src, size_t siz)
31: {
32: char *d = dst;
33: const char *s = src;
34: size_t n = siz;
35:
36: /* Copy as many bytes as will fit */
37: if (n != 0) {
38: while (--n != 0) {
39: if ((*d++ = *s++) == '\0')
40: break;
41: }
42: }
43:
44: /* Not enough room in dst, add NUL and traverse rest of src */
45: if (n == 0) {
46: if (siz != 0)
47: *d = '\0'; /* NUL-terminate dst */
48: while (*s++)
49: ;
50: }
51:
52: return(s - src - 1); /* count does not include NUL */
53: }
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