1/*- 2 * Copyright (c) 2003 Poul-Henning Kamp 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27/* Functions to encode or decode struct dos_partition into a bytestream 28 * of correct endianness and packing. These functions do no validation 29 * or sanity checking, they only pack/unpack the fields correctly. 30 * 31 * NB! This file must be usable both in kernel and userland. 32 */ 33 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: releng/11.0/sys/geom/geom_mbr_enc.c 298808 2016-04-29 20:56:58Z pfg $"); 36 37#include <sys/types.h> 38#include <sys/diskmbr.h> 39#include <sys/endian.h> 40 41void 42dos_partition_dec(void const *pp, struct dos_partition *d) 43{ 44 unsigned char const *p = pp; 45 46 d->dp_flag = p[0]; 47 d->dp_shd = p[1]; 48 d->dp_ssect = p[2]; 49 d->dp_scyl = p[3]; 50 d->dp_typ = p[4]; 51 d->dp_ehd = p[5]; 52 d->dp_esect = p[6]; 53 d->dp_ecyl = p[7]; 54 d->dp_start = le32dec(p + 8); 55 d->dp_size = le32dec(p + 12); 56} 57 58void 59dos_partition_enc(void *pp, struct dos_partition *d) 60{ 61 unsigned char *p = pp; 62 63 p[0] = d->dp_flag; 64 p[1] = d->dp_shd; 65 p[2] = d->dp_ssect; 66 p[3] = d->dp_scyl; 67 p[4] = d->dp_typ; 68 p[5] = d->dp_ehd; 69 p[6] = d->dp_esect; 70 p[7] = d->dp_ecyl; 71 le32enc(p + 8, d->dp_start); 72 le32enc(p + 12, d->dp_size); 73} 74