xref: /freebsd-src/sys/dev/nvme/nvme_util.c (revision fdafd315ad0d0f28a11b9fb4476a9ab059c62b92)

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (C) 2013 Intel Corporation
 * Copyright (C) 1997 Justin T. Gibbs
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <dev/nvme/nvme.h>

void
nvme_strvis(uint8_t *dst, const uint8_t *src, int dstlen, int srclen)
{
	uint8_t *cur_pos;

	/* Trim leading/trailing spaces, nulls. */
	while (srclen > 0 && src[0] == ' ')
		src++, srclen--;
	while (srclen > 0
	    && (src[srclen - 1] == ' ' || src[srclen - 1] == '\0'))
		srclen--;

	while (srclen > 0 && dstlen > 1) {
		cur_pos = dst;

		/* Show '?' for non-printable characters. */
		if (*src < 0x20 || *src >= 0x7F)
			*cur_pos++ = '?';
		else
			*cur_pos++ = *src;
		src++;
		srclen--;
		dstlen -= cur_pos - dst;
		dst = cur_pos;
	}
	*dst = '\0';
}