[apple/network_cmds.git] / unbound / compat / strlcpy.c

/* from openssh 4.3p2 compat/strlcpy.c */
/*
 * 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.
 */

/* OPENBSD ORIGINAL: lib/libc/string/strlcpy.c */

#include <config.h>
#ifndef HAVE_STRLCPY

#include <sys/types.h>
#include <string.h>

/*
 * 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 */
}

#endif /* !HAVE_STRLCPY */
Commit	Line	Data
89c4ed63 A	1	/* from openssh 4.3p2 compat/strlcpy.c */
	2	/*
	3	* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
	4	*
	5	* Permission to use, copy, modify, and distribute this software for any
	6	* purpose with or without fee is hereby granted, provided that the above
	7	* copyright notice and this permission notice appear in all copies.
	8	*
	9	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	10	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	11	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	12	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	13	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	14	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	15	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	16	*/
	17
	18	/* OPENBSD ORIGINAL: lib/libc/string/strlcpy.c */
	19
	20	#include <config.h>
	21	#ifndef HAVE_STRLCPY
	22
	23	#include <sys/types.h>
	24	#include <string.h>
	25
	26	/*
	27	* Copy src to string dst of size siz. At most siz-1 characters
	28	* will be copied. Always NUL terminates (unless siz == 0).
	29	* Returns strlen(src); if retval >= siz, truncation occurred.
	30	*/
	31	size_t
	32	strlcpy(char dst, const char src, size_t siz)
	33	{
	34	char *d = dst;
	35	const char *s = src;
	36	size_t n = siz;
	37
	38	/* Copy as many bytes as will fit */
	39	if (n != 0 && --n != 0) {
	40	do {
	41	if ((d++ = s++) == 0)
	42	break;
	43	} while (--n != 0);
	44	}
	45
	46	/* Not enough room in dst, add NUL and traverse rest of src */
	47	if (n == 0) {
	48	if (siz != 0)
	49	d = '\0'; / NUL-terminate dst */
	50	while (*s++)
	51	;
	52	}
	53
	54	return(s - src - 1); /* count does not include NUL */
	55	}
	56
	57	#endif /* !HAVE_STRLCPY */