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annotate extern/libcompat/src/strlcpy.c @ 1004:3ea3361f0fc7

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irccd: now track modes
author David Demelier <markand@malikania.fr>
date Tue, 16 Feb 2021 18:37:22 +0100
parents 243f9f51b0ff
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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934
243f9f51b0ff irccd: import libcompat and utilities
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1 /* $OpenBSD: strlcpy.c,v 1.16 2019/01/25 00:19:25 millert Exp $ */
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2
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3 /*
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4 * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
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5 *
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6 * Permission to use, copy, modify, and distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <sys/types.h>
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20 #include <string.h>
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21
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22 /*
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23 * Copy string src to buffer dst of size dsize. At most dsize-1
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24 * chars will be copied. Always NUL terminates (unless dsize == 0).
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25 * Returns strlen(src); if retval >= dsize, truncation occurred.
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26 */
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27 size_t
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28 strlcpy(char *dst, const char *src, size_t dsize)
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29 {
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30 const char *osrc = src;
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31 size_t nleft = dsize;
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32
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33 /* Copy as many bytes as will fit. */
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34 if (nleft != 0) {
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35 while (--nleft != 0) {
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36 if ((*dst++ = *src++) == '\0')
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37 break;
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38 }
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39 }
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40
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41 /* Not enough room in dst, add NUL and traverse rest of src. */
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42 if (nleft == 0) {
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43 if (dsize != 0)
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44 *dst = '\0'; /* NUL-terminate dst */
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45 while (*src++)
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46 ;
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47 }
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48
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49 return(src - osrc - 1); /* count does not include NUL */
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50 }