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strlcpy.c - stagit-gopher - static git page generator for gopher |
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git clone git://git.codemadness.org/stagit-gopher (git://git.codemadness.org) |
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LICENSE |
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--- |
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strlcpy.c (1620B) |
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1 /* $OpenBSD: strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */ |
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2 |
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3 /* |
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4 * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com> |
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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 #include "compat.h" |
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23 |
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24 /* |
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25 * Copy string src to buffer dst of size dsize. At most dsize-1 |
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26 * chars will be copied. Always NUL terminates (unless dsize == 0). |
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27 * Returns strlen(src); if retval >= dsize, truncation occurred. |
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28 */ |
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29 size_t |
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30 strlcpy(char *dst, const char *src, size_t dsize) |
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31 { |
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32 const char *osrc = src; |
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33 size_t nleft = dsize; |
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34 |
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35 /* Copy as many bytes as will fit. */ |
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36 if (nleft != 0) { |
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37 while (--nleft != 0) { |
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38 if ((*dst++ = *src++) == '\0') |
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39 break; |
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40 } |
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41 } |
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42 |
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43 /* Not enough room in dst, add NUL and traverse rest of src. */ |
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44 if (nleft == 0) { |
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45 if (dsize != 0) |
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46 *dst = '\0'; /* NUL-terminate dst */ |
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47 while (*src++) |
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48 ; |
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49 } |
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50 |
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51 return(src - osrc - 1); /* count does not include NUL */ |
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52 } |
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