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strlcpy.c - sic - simple irc client
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strlcpy.c (1487B)
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1 /*
2 * Copyright (c) 1998 Todd C. Miller <[email protected]>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANT…
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE F…
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT …
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <string.h>
18 #include <sys/types.h>
19
20 /*
21 * Copy src to string dst of size siz. At most siz-1 characters
22 * will be copied. Always NUL terminates (unless siz == 0).
23 * Returns strlen(src); if retval >= siz, truncation occurred.
24 */
25 size_t
26 strlcpy(char *dst, const char *src, size_t siz)
27 {
28 char *d = dst;
29 const char *s = src;
30 size_t n = siz;
31 /* Copy as many bytes as will fit */
32 if (n != 0) {
33 while (--n != 0) {
34 if ((*d++ = *s++) == '\0')
35 break;
36 }
37 }
38 /* Not enough room in dst, add NUL and traverse rest of src */
39 if (n == 0) {
40 if (siz != 0)
41 *d = '\0'; /* NUL-terminate dst */
42 while (*s++)
43 ;
44 }
45 return(s - src - 1); /* count does not include NUL */
46 }
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