1/*-
2 * Copyright (C) 2013 Intel Corporation
3 * Copyright (C) 1997 Justin T. Gibbs
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <dev/nvme/nvme.h>
33
34void
35nvme_strvis(uint8_t *dst, const uint8_t *src, int dstlen, int srclen)
36{
37	uint8_t *cur_pos;
38
39	/* Trim leading/trailing spaces, nulls. */
40	while (srclen > 0 && src[0] == ' ')
41		src++, srclen--;
42	while (srclen > 0
43	    && (src[srclen - 1] == ' ' || src[srclen - 1] == '\0'))
44		srclen--;
45
46	while (srclen > 0 && dstlen > 1) {
47		cur_pos = dst;
48
49		/* Show '?' for non-printable characters. */
50		if (*src < 0x20 || *src >= 0x7F)
51			*cur_pos++ = '?';
52		else
53			*cur_pos++ = *src;
54		src++;
55		srclen--;
56		dstlen -= cur_pos - dst;
57		dst = cur_pos;
58	}
59	*dst = '\0';
60}
61
62