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, U32* BootDrive, U32* 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 = 0;
  47         }
  48         else if (strnicmp(p, "rdisk(", 6) == 0)
  49         {
  50                 /*
  51                  * hard disk path:
  52                  *  multi(0)disk(0)rdisk(x)partition(y)\path
  53                  */
  54                 p = p + 6;
  55                 *BootDrive = atoi(p) + 0x80;
  56                 p = strchr(p, ')');
  57                 if ((p == NULL) || (strnicmp(p, ")partition(", 11) != 0))
  58                         return FALSE;
  59                 p = p + 11;
  60                 *BootPartition = atoi(p);
  61                 p = strchr(p, ')');
  62                 if ((p == NULL) || (*BootPartition == 0))
  63                         return FALSE;
  64                 p++;
  65         }
  66         else
  67         {
  68                 return FALSE;
  69         }
  70
  71         strcpy(BootPath, p);
  72
  73         return TRUE;
  74 }
  75
  76 void ConstructArcPath(PUCHAR ArcPath, PUCHAR SystemFolder, U32 Disk, U32 Partition)
  77 {
  78         char    tmp[50];
  79
  80         strcpy(ArcPath, "multi(0)disk(0)");
  81
  82         if (Disk < 0x80)
  83         {
  84                 /*
  85                  * floppy disk path:
  86                  *  multi(0)disk(0)fdisk(x)\path
  87                  */
  88                 sprintf(tmp, "fdisk(%d)", (int) Disk);
  89                 strcat(ArcPath, tmp);
  90         }
  91         else
  92         {
  93                 /*
  94                  * hard disk path:
  95                  *  multi(0)disk(0)rdisk(x)partition(y)\path
  96                  */
  97                 sprintf(tmp, "rdisk(%d)partition(%d)", (int) (Disk - 0x80), (int) Partition);
  98                 strcat(ArcPath, tmp);
  99         }
 100
 101         if (SystemFolder[0] == '\\' || SystemFolder[0] == '/')
 102         {
 103                 strcat(ArcPath, SystemFolder);
 104         }
 105         else
 106         {
 107                 strcat(ArcPath, "\\");
 108                 strcat(ArcPath, SystemFolder);
 109         }
 110 }
 111
 112 U32 ConvertArcNameToBiosDriveNumber(PUCHAR ArcPath)
 113 {
 114         char *  p;
 115         U32             DriveNumber = 0;
 116
 117         if (strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
 118                 return 0;
 119
 120         p = ArcPath + 15;
 121         if (strnicmp(p, "fdisk(", 6) == 0)
 122         {
 123                 /*
 124                  * floppy disk path:
 125                  *  multi(0)disk(0)fdisk(x)\path
 126                  */
 127                 p = p + 6;
 128                 DriveNumber = atoi(p);
 129         }
 130         else if (strnicmp(p, "rdisk(", 6) == 0)
 131         {
 132                 /*
 133                  * hard disk path:
 134                  *  multi(0)disk(0)rdisk(x)partition(y)\path
 135                  */
 136                 p = p + 6;
 137                 DriveNumber = atoi(p) + 0x80;
 138         }
 139
 140         return DriveNumber;
 141 }