xref: /freebsd/sys/dev/nvme/nvme_util.c (revision fdafd315ad0d0f28a11b9fb4476a9ab059c62b92)
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 
33 void
nvme_strvis(uint8_t * dst,const uint8_t * src,int dstlen,int srclen)34 nvme_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