/* Safe string copying and concatenation

  * These routines are originally distributed in two separate files. I have

  * copied the files verbatim in this single source file, including all comments.

  * The only change is that the second set of include files is commented out

  * (there is no need to include the same files twice).

  */

 #include "lstring.h"

 #if !defined HAVE_SAFESTR

 /*	$OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $	*/

 /*

  * Copyright (c) 1998 Todd C. Miller <[email protected]>

  *

  * 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 <sys/types.h>  already included through lstring.h

  */

 #include <string.h>   /* for strlen() */

 /*

  * Copy src to string dst of size siz.  At most siz-1 characters

  * will be copied.  Always NUL terminates (unless siz == 0).

  * Returns strlen(src); if retval >= siz, truncation occurred.

  */

 size_t

 strlcpy(char *dst, const char *src, size_t siz)

 {

 	char *d = dst;

 	const char *s = src;

 	size_t n = siz;

 	/* Copy as many bytes as will fit */

 	if (n != 0 && --n != 0) {

 		do {

 			if ((*d++ = *s++) == 0)

 				break;

 		} while (--n != 0);

 	}

 	/* Not enough room in dst, add NUL and traverse rest of src */

 	if (n == 0) {

 		if (siz != 0)

 			*d = '\0';		/* NUL-terminate dst */

 		while (*s++)

 			;

 	}

 	return(s - src - 1);	/* count does not include NUL */

 }

 /*	$OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $	*/

 /*

  * Copyright (c) 1998 Todd C. Miller <[email protected]>

  *

  * 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 <sys/types.h>    already included

   #include <string.h>       already included

 */

 /*

  * 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 */

 }

 #endif /* #if !defined HAVE_SAFESTR */