1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (C) 2013 Intel Corporation
5 * Copyright (C) 1997 Justin T. Gibbs
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/param.h>
31#include <dev/nvme/nvme.h>
32
33void
34nvme_strvis(uint8_t *dst, const uint8_t *src, int dstlen, int srclen)
35{
36	uint8_t *cur_pos;
37
38	/* Trim leading/trailing spaces, nulls. */
39	while (srclen > 0 && src[0] == ' ')
40		src++, srclen--;
41	while (srclen > 0
42	    && (src[srclen - 1] == ' ' || src[srclen - 1] == '\0'))
43		srclen--;
44
45	while (srclen > 0 && dstlen > 1) {
46		cur_pos = dst;
47
48		/* Show '?' for non-printable characters. */
49		if (*src < 0x20 || *src >= 0x7F)
50			*cur_pos++ = '?';
51		else
52			*cur_pos++ = *src;
53		src++;
54		srclen--;
55		dstlen -= cur_pos - dst;
56		dst = cur_pos;
57	}
58	*dst = '\0';
59}
60