reactos/boot/freeldr/freeldr/reactos/arcname.c

   1 /*
   2  *  FreeLoader - arcname.c
   3  *
   4  *  Copyright (C) 2001  Brian Palmer  <brianp@sginet.com>
   5  *  Copyright (C) 2001  Eric Kohl
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <freeldr.h>
  23
  24 BOOL DissectArcPath(CHAR *ArcPath, CHAR *BootPath, ULONG* BootDrive, ULONG* BootPartition)
  25 {
  26         char *p;
  27
  28         if (strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
  29                 return FALSE;
  30
  31         p = ArcPath + 15;
  32         if (strnicmp(p, "fdisk(", 6) == 0)
  33         {
  34                 /*
  35                  * floppy disk path:
  36                  *  multi(0)disk(0)fdisk(x)\path
  37                  */
  38                 p = p + 6;
  39                 *BootDrive = atoi(p);
  40                 p = strchr(p, ')');
  41                 if (p == NULL)
  42                         return FALSE;
  43                 p++;
  44                 *BootPartition = 0xff;
  45         }
  46         else if (strnicmp(p, "cdrom(", 6) == 0)
  47         {
  48                 /*
  49                  * cdrom path:
  50                  *  multi(0)disk(0)cdrom(x)\path
  51                  */
  52                 p = p + 6;
  53                 *BootDrive = atoi(p);
  54                 p = strchr(p, ')');
  55                 if (p == NULL)
  56                         return FALSE;
  57                 p++;
  58                 *BootPartition = 0xff;
  59         }
  60         else if (strnicmp(p, "rdisk(", 6) == 0)
  61         {
  62                 /*
  63                  * hard disk path:
  64                  *  multi(0)disk(0)rdisk(x)partition(y)\path
  65                  */
  66                 p = p + 6;
  67                 *BootDrive = atoi(p) + 0x80;
  68                 p = strchr(p, ')');
  69                 if ((p == NULL) || (strnicmp(p, ")partition(", 11) != 0))
  70                         return FALSE;
  71                 p = p + 11;
  72                 *BootPartition = atoi(p);
  73                 p = strchr(p, ')');
  74                 if (p == NULL)
  75                         return FALSE;
  76                 p++;
  77         }
  78         else
  79         {
  80                 return FALSE;
  81         }
  82
  83         strcpy(BootPath, p);
  84
  85         return TRUE;
  86 }
  87
  88 VOID ConstructArcPath(PCHAR ArcPath, PCHAR SystemFolder, ULONG Disk, ULONG Partition)
  89 {
  90         char    tmp[50];
  91
  92         strcpy(ArcPath, "multi(0)disk(0)");
  93
  94         if (Disk < 0x80)
  95         {
  96                 /*
  97                  * floppy disk path:
  98                  *  multi(0)disk(0)fdisk(x)\path
  99                  */
 100                 sprintf(tmp, "fdisk(%d)", (int) Disk);
 101                 strcat(ArcPath, tmp);
 102         }
 103         else
 104         {
 105                 /*
 106                  * hard disk path:
 107                  *  multi(0)disk(0)rdisk(x)partition(y)\path
 108                  */
 109                 sprintf(tmp, "rdisk(%d)partition(%d)", (int) (Disk - 0x80), (int) Partition);
 110                 strcat(ArcPath, tmp);
 111         }
 112
 113         if (SystemFolder[0] == '\\' || SystemFolder[0] == '/')
 114         {
 115                 strcat(ArcPath, SystemFolder);
 116         }
 117         else
 118         {
 119                 strcat(ArcPath, "\\");
 120                 strcat(ArcPath, SystemFolder);
 121         }
 122 }
 123
 124 ULONG ConvertArcNameToBiosDriveNumber(PCHAR ArcPath)
 125 {
 126         char *  p;
 127         ULONG           DriveNumber = 0;
 128
 129         if (strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
 130                 return 0;
 131
 132         p = ArcPath + 15;
 133         if (strnicmp(p, "fdisk(", 6) == 0)
 134         {
 135                 /*
 136                  * floppy disk path:
 137                  *  multi(0)disk(0)fdisk(x)\path
 138                  */
 139                 p = p + 6;
 140                 DriveNumber = atoi(p);
 141         }
 142         else if (strnicmp(p, "rdisk(", 6) == 0)
 143         {
 144                 /*
 145                  * hard disk path:
 146                  *  multi(0)disk(0)rdisk(x)partition(y)\path
 147                  */
 148                 p = p + 6;
 149                 DriveNumber = atoi(p) + 0x80;
 150         }
 151
 152         return DriveNumber;
 153 }