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util.c revision 1.2 
      1 /*	$NetBSD: util.c,v 1.2 2018/04/18 10:11:44 nonaka 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 1.2 2018/04/18 10:11:44 nonaka 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 
     45 void
     46 nvme_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 
     87 void
     88 print_bignum(const char *title, uint64_t v[2], const char *suffix)
     89 {
     90 	char buf[64];
     91 	uint8_t tmp[16];
     92 	uint64_t h, l;
     93 
     94 #if _BYTE_ORDER != _LITTLE_ENDIAN
     95 	/* Already Converted to host endian */
     96 	h = v[0];
     97 	l = v[1];
     98 	memcpy(tmp, v, sizeof(tmp));
     99 #else
    100 	h = v[1];
    101 	l = v[0];
    102 
    103 	tmp[ 0] = (h >> 56) & 0xff;
    104 	tmp[ 1] = (h >> 48) & 0xff;
    105 	tmp[ 2] = (h >> 40) & 0xff;
    106 	tmp[ 3] = (h >> 32) & 0xff;
    107 	tmp[ 4] = (h >> 24) & 0xff;
    108 	tmp[ 5] = (h >> 16) & 0xff;
    109 	tmp[ 6] = (h >> 8) & 0xff;
    110 	tmp[ 7] = h & 0xff;
    111 	tmp[ 8] = (l >> 56) & 0xff;
    112 	tmp[ 9] = (l >> 48) & 0xff;
    113 	tmp[10] = (l >> 40) & 0xff;
    114 	tmp[11] = (l >> 32) & 0xff;
    115 	tmp[12] = (l >> 24) & 0xff;
    116 	tmp[13] = (l >> 16) & 0xff;
    117 	tmp[14] = (l >> 8) & 0xff;
    118 	tmp[15] = l & 0xff;
    119 #endif
    120 
    121 	buf[0] = '\0';
    122 	BIGNUM *bn = BN_bin2bn(tmp, sizeof(tmp), NULL);
    123 	if (bn != NULL) {
    124 		humanize_bignum(buf, METRIX_PREFIX_BUFSIZ + strlen(suffix),
    125 		    bn, suffix, HN_AUTOSCALE, HN_DECIMAL);
    126 		BN_free(bn);
    127 	}
    128 	if (buf[0] == '\0')
    129 		snprintf(buf, sizeof(buf), "0x%016" PRIx64 "%016" PRIx64, h, l);
    130 	printf("%-31s %s\n", title, buf);
    131 }
    132 
    133 /* "Missing" from endian.h */
    134 uint64_t
    135 le48dec(const void *pp)
    136 {
    137 	uint8_t const *p = (uint8_t const *)pp;
    138 
    139 	return (((uint64_t)le16dec(p + 4) << 32) | le32dec(p));
    140 }
    141