1/*	$NetBSD: util.c,v 1.3 2023/02/02 08:21:32 mlelstv Exp $	*/
2
3/*-
4 * Copyright (c) 2017 Netflix, Inc
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30#ifndef lint
31__RCSID("$NetBSD: util.c,v 1.3 2023/02/02 08:21:32 mlelstv Exp $");
32#if 0
33__FBSDID("$FreeBSD: head/sbin/nvmecontrol/util.c 320423 2017-06-27 20:24:25Z imp $");
34#endif
35#endif
36
37#include <sys/endian.h>
38
39#include <stdlib.h>
40#include <string.h>
41
42#include "nvmectl.h"
43#include "bn.h"
44
45void
46nvme_strvis(u_char *dst, int dlen, const u_char *src, int slen)
47{
48#define STRVIS_ISWHITE(x) ((x) == ' ' || (x) == '\0' || (x) == (u_char)'\377')
49	/* Trim leading and trailing blanks and NULs. */
50	while (slen > 0 && STRVIS_ISWHITE(src[0]))
51		++src, --slen;
52	while (slen > 0 && STRVIS_ISWHITE(src[slen - 1]))
53		--slen;
54
55	while (slen > 0) {
56		if (*src < 0x20 || *src >= 0x80) {
57			/* non-printable characters */
58			dlen -= 4;
59			if (dlen < 1)
60				break;
61			*dst++ = '\\';
62			*dst++ = ((*src & 0300) >> 6) + '0';
63			*dst++ = ((*src & 0070) >> 3) + '0';
64			*dst++ = ((*src & 0007) >> 0) + '0';
65		} else if (*src == '\\') {
66			/* quote characters */
67			dlen -= 2;
68			if (dlen < 1)
69				break;
70			*dst++ = '\\';
71			*dst++ = '\\';
72		} else {
73			/* normal characters */
74			if (--dlen < 1)
75				break;
76			*dst++ = *src;
77		}
78		++src, --slen;
79	}
80
81	*dst++ = 0;
82}
83
84#define	METRIX_PREFIX_BUFSIZ	17
85#define	NO_METRIX_PREFIX_BUFSIZ	42
86
87static void
88unit_string(BIGNUM *bn, const char *unit, long scale, char *out, size_t len)
89{
90	size_t ulen = strlen(unit);
91	uint8_t tmp[4];
92	BN_CTX *ctx;
93	BIGNUM *sn;
94
95	if (6 + ulen + 3 >= len)
96		return;
97
98	if (scale > 1) {
99		ctx = BN_CTX_new();
100		if (ctx == NULL)
101			return;
102
103		tmp[0] = (scale >> 24) & 0xff;
104		tmp[1] = (scale >> 16) & 0xff;
105		tmp[2] = (scale >>  8) & 0xff;
106		tmp[3] = scale & 0xff;
107
108		sn = BN_bin2bn(tmp, sizeof(tmp), NULL);
109		if (sn != NULL) {
110			BN_mul(bn, bn, sn, ctx);
111			BN_free(sn);
112		}
113
114		BN_CTX_free(ctx);
115	}
116
117	strncpy(out, " (", len);
118	humanize_bignum(out+2, 6 + ulen, bn, unit, HN_AUTOSCALE, HN_DECIMAL);
119	strncat(out, ")", len);
120}
121
122void
123print_bignum1(const char *title, uint64_t v[2], const char *suffix,
124    const char *unit, long scale)
125{
126	char buf[64];
127	char buf2[64];
128	uint8_t tmp[16];
129	uint64_t h, l;
130
131#if _BYTE_ORDER != _LITTLE_ENDIAN
132	/* Already Converted to host endian */
133	h = v[0];
134	l = v[1];
135	memcpy(tmp, v, sizeof(tmp));
136#else
137	h = v[1];
138	l = v[0];
139
140	tmp[ 0] = (h >> 56) & 0xff;
141	tmp[ 1] = (h >> 48) & 0xff;
142	tmp[ 2] = (h >> 40) & 0xff;
143	tmp[ 3] = (h >> 32) & 0xff;
144	tmp[ 4] = (h >> 24) & 0xff;
145	tmp[ 5] = (h >> 16) & 0xff;
146	tmp[ 6] = (h >> 8) & 0xff;
147	tmp[ 7] = h & 0xff;
148	tmp[ 8] = (l >> 56) & 0xff;
149	tmp[ 9] = (l >> 48) & 0xff;
150	tmp[10] = (l >> 40) & 0xff;
151	tmp[11] = (l >> 32) & 0xff;
152	tmp[12] = (l >> 24) & 0xff;
153	tmp[13] = (l >> 16) & 0xff;
154	tmp[14] = (l >> 8) & 0xff;
155	tmp[15] = l & 0xff;
156#endif
157
158	buf[0] = '\0';
159	buf2[0] = '\0';
160
161	BIGNUM *bn = BN_bin2bn(tmp, sizeof(tmp), NULL);
162	if (bn != NULL) {
163		humanize_bignum(buf, METRIX_PREFIX_BUFSIZ + strlen(suffix),
164		    bn, suffix, HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE);
165		if (unit)
166			unit_string(bn, unit, scale, buf2, sizeof(buf2));
167		BN_free(bn);
168	}
169	if (buf[0] == '\0')
170		snprintf(buf, sizeof(buf), "0x%016" PRIx64 "%016" PRIx64, h, l);
171	printf("%-31s %s%s\n", title, buf, buf2);
172}
173
174void
175print_bignum(const char *title, uint64_t v[2], const char *suffix)
176{
177	print_bignum1(title, v, suffix, NULL, 1);
178}
179
180/* "Missing" from endian.h */
181uint64_t
182le48dec(const void *pp)
183{
184	uint8_t const *p = (uint8_t const *)pp;
185
186	return (((uint64_t)le16dec(p + 4) << 32) | le32dec(p));
187}
188