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/* $Id: strlcat.c 5681 2002-08-29 04:07:50Z rra $
**
** Replacement for a missing strlcat.
**
** Written by Russ Allbery <rra@stanford.edu>
** This work is hereby placed in the public domain by its author.
**
** Provides the same functionality as the *BSD function strlcat, originally
** developed by Todd Miller and Theo de Raadt. strlcat works similarly to
** strncat, except simpler. The result is always nul-terminated even if the
** source string is longer than the space remaining in the destination
** string, and the total space required is returned. The third argument is
** the total space available in the destination buffer, not just the amount
** of space remaining.
*/
#include "config.h"
#include "clibrary.h"
/* If we're running the test suite, rename strlcat to avoid conflicts with
the system version. */
#if TESTING
# define strlcat test_strlcat
size_t test_strlcat(char *, const char *, size_t);
#endif
size_t
strlcat(char *dst, const char *src, size_t size)
{
size_t used, length, copy;
used = strlen(dst);
length = strlen(src);
if (size > 0 && used < size - 1) {
copy = (length >= size - used) ? size - used - 1 : length;
memcpy(dst + used, src, copy);
dst[used + copy] = '\0';
}
return used + length;
}
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