michael@0: /*	$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $	*/
michael@0: 
michael@0: /*
michael@0:  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
michael@0:  * All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  * 3. The name of the author may not be used to endorse or promote products
michael@0:  *    derived from this software without specific prior written permission.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
michael@0:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
michael@0:  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
michael@0:  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
michael@0:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
michael@0:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
michael@0:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
michael@0:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
michael@0:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
michael@0:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  */
michael@0: 
michael@0: #if defined(LIBC_SCCS) && !defined(lint)
michael@0: static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $";
michael@0: #endif /* LIBC_SCCS and not lint */
michael@0: 
michael@0: #include <sys/types.h>
michael@0: 
michael@0: #include "event2/event-config.h"
michael@0: 
michael@0: #ifndef _EVENT_HAVE_STRLCPY
michael@0: #include "strlcpy-internal.h"
michael@0: 
michael@0: /*
michael@0:  * Copy src to string dst of size siz.  At most siz-1 characters
michael@0:  * will be copied.  Always NUL terminates (unless siz == 0).
michael@0:  * Returns strlen(src); if retval >= siz, truncation occurred.
michael@0:  */
michael@0: size_t
michael@0: _event_strlcpy(dst, src, siz)
michael@0: 	char *dst;
michael@0: 	const char *src;
michael@0: 	size_t siz;
michael@0: {
michael@0: 	register char *d = dst;
michael@0: 	register const char *s = src;
michael@0: 	register size_t n = siz;
michael@0: 
michael@0: 	/* Copy as many bytes as will fit */
michael@0: 	if (n != 0 && --n != 0) {
michael@0: 		do {
michael@0: 			if ((*d++ = *s++) == 0)
michael@0: 				break;
michael@0: 		} while (--n != 0);
michael@0: 	}
michael@0: 
michael@0: 	/* Not enough room in dst, add NUL and traverse rest of src */
michael@0: 	if (n == 0) {
michael@0: 		if (siz != 0)
michael@0: 			*d = '\0';		/* NUL-terminate dst */
michael@0: 		while (*s++)
michael@0: 			;
michael@0: 	}
michael@0: 
michael@0: 	return (s - src - 1);	/* count does not include NUL */
michael@0: }
michael@0: #endif