0,0 → 1,74 |
/* $OpenBSD: strlcat.c,v 1.8 2001/05/13 15:40:15 deraadt Exp $ */ |
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/* |
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* 1. Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* 3. The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
#if defined(LIBC_SCCS) && !defined(lint) |
static char *rcsid = "$OpenBSD: strlcat.c,v 1.8 2001/05/13 15:40:15 deraadt Exp $"; |
#endif /* LIBC_SCCS and not lint */ |
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#include <sys/types.h> |
#include <string.h> |
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/* |
* Appends src to string dst of size siz (unlike strncat, siz is the |
* full size of dst, not space left). At most siz-1 characters |
* will be copied. Always NUL terminates (unless siz <= strlen(dst)). |
* Returns strlen(src) + MIN(siz, strlen(initial dst)). |
* If retval >= siz, truncation occurred. |
*/ |
size_t |
_DEFUN (strlcat, (dst, src, siz), |
char *dst _AND |
_CONST char *src _AND |
size_t siz) |
{ |
register char *d = dst; |
register const char *s = src; |
register size_t n = siz; |
size_t dlen; |
|
/* Find the end of dst and adjust bytes left but don't go past end */ |
while (n-- != 0 && *d != '\0') |
d++; |
dlen = d - dst; |
n = siz - dlen; |
|
if (n == 0) |
return(dlen + strlen(s)); |
while (*s != '\0') { |
if (n != 1) { |
*d++ = *s; |
n--; |
} |
s++; |
} |
*d = '\0'; |
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return(dlen + (s - src)); /* count does not include NUL */ |
} |
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