/*
* src / port / strlcat . c
*
* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
/*
* Copyright ( c ) 1998 Todd C . Miller < Todd . Miller @ courtesan . com >
*
* Permission to use , copy , modify , and distribute this software for any
* purpose with or without fee is hereby granted , provided that the above
* copyright notice and this permission notice appear in all copies .
*
* THE SOFTWARE IS PROVIDED " AS IS " AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS . IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL , DIRECT , INDIRECT , OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE , DATA OR PROFITS , WHETHER IN AN
* ACTION OF CONTRACT , NEGLIGENCE OR OTHER TORTIOUS ACTION , ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE .
*/
#include "c.h"
/*
* 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
strlcat(char *dst, const char *src, size_t siz)
{
char *d = dst;
const char *s = src;
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' ;
return (dlen + (s - src)); /* count does not include NUL */
}
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