Mercurial > irccd
annotate extern/libbsd/strlcat.c @ 1085:91e3def8c708
irccdctl: fix server-part without reason
author | David Demelier <markand@malikania.fr> |
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date | Wed, 21 Jul 2021 07:48:41 +0200 |
parents | 8f26ee9cc6dd |
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rev | line source |
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1 /* $OpenBSD: strlcat.c,v 1.19 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 * Appends src to string dst of size dsize (unlike strncat, dsize is the |
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24 * full size of dst, not space left). At most dsize-1 characters |
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25 * will be copied. Always NUL terminates (unless dsize <= strlen(dst)). |
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26 * Returns strlen(src) + MIN(dsize, strlen(initial dst)). |
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27 * If retval >= dsize, truncation occurred. |
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28 */ |
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29 size_t |
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30 irc_util_strlcat(char *dst, const char *src, size_t dsize) |
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31 { |
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32 const char *odst = dst; |
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33 const char *osrc = src; |
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34 size_t n = dsize; |
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35 size_t dlen; |
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36 |
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37 /* Find the end of dst and adjust bytes left but don't go past end. */ |
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38 while (n-- != 0 && *dst != '\0') |
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39 dst++; |
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40 dlen = dst - odst; |
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41 n = dsize - dlen; |
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42 |
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43 if (n-- == 0) |
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44 return(dlen + strlen(src)); |
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45 while (*src != '\0') { |
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46 if (n != 0) { |
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47 *dst++ = *src; |
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48 n--; |
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49 } |
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50 src++; |
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51 } |
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52 *dst = '\0'; |
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53 |
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54 return(dlen + (src - osrc)); /* count does not include NUL */ |
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55 } |