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 #include <rtl.h>
  24
  25
  26 BOOL DissectArcPath(CHAR *ArcPath, CHAR *BootPath, ULONG* BootDrive, ULONG* BootPartition)
  27 {
  28         char *p;
  29
  30         if (strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
  31                 return FALSE;
  32
  33         p = ArcPath + 15;
  34         if (strnicmp(p, "fdisk(", 6) == 0)
  35         {
  36                 /*
  37                  * floppy disk path:
  38                  *  multi(0)disk(0)fdisk(x)\path
  39                  */
  40                 p = p + 6;
  41                 *BootDrive = atoi(p);
  42                 p = strchr(p, ')');
  43                 if (p == NULL)
  44                         return FALSE;
  45                 p++;
  46                 *BootPartition = 0xff;
  47         }
  48         else if (strnicmp(p, "cdrom(", 6) == 0)
  49         {
  50                 /*
  51                  * cdrom path:
  52                  *  multi(0)disk(0)cdrom(x)\path
  53                  */
  54                 p = p + 6;
  55                 *BootDrive = atoi(p);
  56                 p = strchr(p, ')');
  57                 if (p == NULL)
  58                         return FALSE;
  59                 p++;
  60                 *BootPartition = 0xff;
  61         }
  62         else if (strnicmp(p, "rdisk(", 6) == 0)
  63         {
  64                 /*
  65                  * hard disk path:
  66                  *  multi(0)disk(0)rdisk(x)partition(y)\path
  67                  */
  68                 p = p + 6;
  69                 *BootDrive = atoi(p) + 0x80;
  70                 p = strchr(p, ')');
  71                 if ((p == NULL) || (strnicmp(p, ")partition(", 11) != 0))
  72                         return FALSE;
  73                 p = p + 11;
  74                 *BootPartition = atoi(p);
  75                 p = strchr(p, ')');
  76                 if ((p == NULL) || (*BootPartition == 0))
  77                         return FALSE;
  78                 p++;
  79         }
  80         else
  81         {
  82                 return FALSE;
  83         }
  84
  85         strcpy(BootPath, p);
  86
  87         return TRUE;
  88 }
  89
  90 VOID ConstructArcPath(PCHAR ArcPath, PCHAR SystemFolder, ULONG Disk, ULONG Partition)
  91 {
  92         char    tmp[50];
  93
  94         strcpy(ArcPath, "multi(0)disk(0)");
  95
  96         if (Disk < 0x80)
  97         {
  98                 /*
  99                  * floppy disk path:
 100                  *  multi(0)disk(0)fdisk(x)\path
 101                  */
 102                 sprintf(tmp, "fdisk(%d)", (int) Disk);
 103                 strcat(ArcPath, tmp);
 104         }
 105         else
 106         {
 107                 /*
 108                  * hard disk path:
 109                  *  multi(0)disk(0)rdisk(x)partition(y)\path
 110                  */
 111                 sprintf(tmp, "rdisk(%d)partition(%d)", (int) (Disk - 0x80), (int) Partition);
 112                 strcat(ArcPath, tmp);
 113         }
 114
 115         if (SystemFolder[0] == '\\' || SystemFolder[0] == '/')
 116         {
 117                 strcat(ArcPath, SystemFolder);
 118         }
 119         else
 120         {
 121                 strcat(ArcPath, "\\");
 122                 strcat(ArcPath, SystemFolder);
 123         }
 124 }
 125
 126 ULONG ConvertArcNameToBiosDriveNumber(PCHAR ArcPath)
 127 {
 128         char *  p;
 129         ULONG           DriveNumber = 0;
 130
 131         if (strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
 132                 return 0;
 133
 134         p = ArcPath + 15;
 135         if (strnicmp(p, "fdisk(", 6) == 0)
 136         {
 137                 /*
 138                  * floppy disk path:
 139                  *  multi(0)disk(0)fdisk(x)\path
 140                  */
 141                 p = p + 6;
 142                 DriveNumber = atoi(p);
 143         }
 144         else if (strnicmp(p, "rdisk(", 6) == 0)
 145         {
 146                 /*
 147                  * hard disk path:
 148                  *  multi(0)disk(0)rdisk(x)partition(y)\path
 149                  */
 150                 p = p + 6;
 151                 DriveNumber = atoi(p) + 0x80;
 152         }
 153
 154         return DriveNumber;
 155 }