Differential D34411 Diff 103491 contrib/mg/strlcpy.c

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contrib/mg/strlcpy.c

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				/* $OpenBSD: strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */

				/*
				* Copyright (c) 1998, 2015 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 <sys/types.h>
				#include <string.h>

				#include "config.h"

				#ifndef HAVE_STRLCPY

				/*
				* Copy string src to buffer dst of size dsize. At most dsize-1
				* chars will be copied. Always NUL terminates (unless dsize == 0).
				* Returns strlen(src); if retval >= dsize, truncation occurred.
				*/
				size_t
				strlcpy(char dst, const char src, size_t dsize)
				{
				const char *osrc = src;
				size_t nleft = dsize;

				/* Copy as many bytes as will fit. */
				if (nleft != 0) {
				while (--nleft != 0) {
				if ((dst++ = src++) == '\0')
				break;
				}
				}

				/* Not enough room in dst, add NUL and traverse rest of src. */
				if (nleft == 0) {
				if (dsize != 0)
				dst = '\0'; / NUL-terminate dst */
				while (*src++)
				;
				}

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

				#endif /* !HAVE_STRLCPY */