The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_pc98_enc.c

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    1 /*-
    2  * Copyright (c) 2003 TAKAHASHI Yoshihiro
    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 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/6.0/sys/geom/geom_pc98_enc.c 145761 2005-05-01 09:44:50Z nyan $");
   29 
   30 #include <sys/types.h>
   31 #include <sys/diskpc98.h>
   32 #include <sys/endian.h>
   33 
   34 void
   35 pc98_partition_dec(void const *pp, struct pc98_partition *d)
   36 {
   37         unsigned char const *ptr = pp;
   38         u_int i;
   39 
   40         d->dp_mid = ptr[0];
   41         d->dp_sid = ptr[1];
   42         d->dp_dum1 = ptr[2];
   43         d->dp_dum2 = ptr[3];
   44         d->dp_ipl_sct = ptr[4];
   45         d->dp_ipl_head = ptr[5];
   46         d->dp_ipl_cyl = le16dec(ptr + 6);
   47         d->dp_ssect = ptr[8];
   48         d->dp_shd = ptr[9];
   49         d->dp_scyl = le16dec(ptr + 10);
   50         d->dp_esect = ptr[12];
   51         d->dp_ehd = ptr[13];
   52         d->dp_ecyl = le16dec(ptr + 14);
   53         for (i = 0; i < sizeof (d->dp_name); i++)
   54                 d->dp_name[i] = ptr[16 + i];
   55 }
   56 
   57 void
   58 pc98_partition_enc(void *pp, struct pc98_partition *d)
   59 {
   60         unsigned char *ptr = pp;
   61         u_int i;
   62 
   63         ptr[0] = d->dp_mid;
   64         ptr[1] = d->dp_sid;
   65         ptr[2] = d->dp_dum1;
   66         ptr[3] = d->dp_dum2;
   67         ptr[4] = d->dp_ipl_sct;
   68         ptr[5] = d->dp_ipl_head;
   69         le16enc(ptr + 6, d->dp_ipl_cyl);
   70         ptr[8] = d->dp_ssect;
   71         ptr[9] = d->dp_shd;
   72         le16enc(ptr + 10, d->dp_scyl);
   73         ptr[12] = d->dp_esect;
   74         ptr[13] = d->dp_ehd;
   75         le16enc(ptr + 14, d->dp_ecyl);
   76         for (i = 0; i < sizeof (d->dp_name); i++)
   77                 ptr[16 + i] = d->dp_name[i];
   78 }

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