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73 lines
2.4 KiB
73 lines
2.4 KiB
/* $NetBSD: strlcat.c,v 1.5 1999/09/20 04:39:47 lukem Exp $ */ |
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/* from OpenBSD: strlcat.c,v 1.2 1999/06/17 16:28:58 millert Exp */ |
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/* |
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* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifdef HAVE_CONFIG_H |
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#include <config.h> |
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#endif |
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#include <netdissect-stdinc.h> |
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#include <string.h> |
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#include "netdissect.h" |
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/* |
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* Appends src to string dst of size siz (unlike strncat, siz is the |
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* full size of dst, not space left). At most siz-1 characters |
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* will be copied. Always NUL terminates (unless siz == 0). |
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* Returns strlen(src); if retval >= siz, truncation occurred. |
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*/ |
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size_t |
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strlcat(char *dst, const char *src, size_t siz) |
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{ |
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register char *d = dst; |
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register const char *s = src; |
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register size_t n = siz; |
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size_t dlen; |
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/* Find the end of dst and adjust bytes left but don't go past end */ |
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while (*d != '\0' && n-- != 0) |
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d++; |
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dlen = d - dst; |
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n = siz - dlen; |
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if (n == 0) |
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return(dlen + strlen(s)); |
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while (*s != '\0') { |
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if (n != 1) { |
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*d++ = *s; |
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n--; |
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} |
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s++; |
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} |
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*d = '\0'; |
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return(dlen + (s - src)); /* count does not include NUL */ |
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}
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