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 along
  18  *  with this program; if not, write to the Free Software Foundation, Inc.,
  19  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include <freeldr.h>
  23
  24 BOOLEAN DissectArcPath(CHAR *ArcPath, CHAR *BootPath, ULONG* BootDrive, ULONG* BootPartition)
  25 {
  26         char *p;
  27
  28         //
  29         // Detect ramdisk path
  30         //
  31         if (_strnicmp(ArcPath, "ramdisk(0)", 10) == 0)
  32         {
  33                 //
  34                 // Magic value for ramdisks
  35                 //
  36                 *BootDrive = 0x49;
  37                 *BootPartition = 1;
  38
  39                 //
  40                 // Get the path
  41                 //
  42                 p = ArcPath + 11;
  43                 strcpy(BootPath, p);
  44                 return TRUE;
  45         }
  46
  47         if (_strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
  48                 return FALSE;
  49
  50         p = ArcPath + 15;
  51         if (_strnicmp(p, "fdisk(", 6) == 0)
  52         {
  53                 /*
  54                  * floppy disk path:
  55                  *  multi(0)disk(0)fdisk(x)\path
  56                  */
  57                 p = p + 6;
  58                 *BootDrive = atoi(p);
  59                 p = strchr(p, ')');
  60                 if (p == NULL)
  61                         return FALSE;
  62                 p++;
  63                 *BootPartition = 0xff;
  64         }
  65         else if (_strnicmp(p, "cdrom(", 6) == 0)
  66         {
  67                 /*
  68                  * cdrom path:
  69                  *  multi(0)disk(0)cdrom(x)\path
  70                  */
  71                 p = p + 6;
  72                 *BootDrive = atoi(p);
  73                 p = strchr(p, ')');
  74                 if (p == NULL)
  75                         return FALSE;
  76                 p++;
  77                 *BootPartition = 0xff;
  78         }
  79         else if (_strnicmp(p, "rdisk(", 6) == 0)
  80         {
  81                 /*
  82                  * hard disk path:
  83                  *  multi(0)disk(0)rdisk(x)partition(y)\path
  84                  */
  85                 p = p + 6;
  86                 *BootDrive = atoi(p) + 0x80;
  87                 p = strchr(p, ')');
  88                 if ((p == NULL) || (_strnicmp(p, ")partition(", 11) != 0))
  89                         return FALSE;
  90                 p = p + 11;
  91                 *BootPartition = atoi(p);
  92                 p = strchr(p, ')');
  93                 if (p == NULL)
  94                         return FALSE;
  95                 p++;
  96         }
  97         else
  98         {
  99                 return FALSE;
 100         }
 101
 102         strcpy(BootPath, p);
 103
 104         return TRUE;
 105 }
 106
 107 /* PathSyntax: scsi() = 0, multi() = 1, ramdisk() = 2 */
 108 BOOLEAN
 109 DissectArcPath2(
 110     IN CHAR* ArcPath,
 111     OUT ULONG* x,
 112     OUT ULONG* y,
 113     OUT ULONG* z,
 114     OUT ULONG* Partition,
 115     OUT ULONG *PathSyntax)
 116 {
 117     /* Detect ramdisk() */
 118     if (_strnicmp(ArcPath, "ramdisk(0)", 10) == 0)
 119     {
 120         *x = *y = *z = 0;
 121         *Partition = 1;
 122         *PathSyntax = 2;
 123         return TRUE;
 124     }
 125     /* Detect scsi()disk()rdisk()partition() */
 126     else if (sscanf(ArcPath, "scsi(%lu)disk(%lu)rdisk(%lu)partition(%lu)", x, y, z, Partition) == 4)
 127     {
 128         *PathSyntax = 0;
 129         return TRUE;
 130     }
 131     /* Detect scsi()cdrom()fdisk() */
 132     else if (sscanf(ArcPath, "scsi(%lu)cdrom(%lu)fdisk(%lu)", x, y, z) == 3)
 133     {
 134         *Partition = 0;
 135         *PathSyntax = 0;
 136         return TRUE;
 137     }
 138     /* Detect multi()disk()rdisk()partition() */
 139     else if (sscanf(ArcPath, "multi(%lu)disk(%lu)rdisk(%lu)partition(%lu)", x, y, z, Partition) == 4)
 140     {
 141         *PathSyntax = 1;
 142         return TRUE;
 143     }
 144     /* Detect multi()disk()cdrom() */
 145     else if (sscanf(ArcPath, "multi(%lu)disk(%lu)cdrom(%lu)", x, y, z) == 3)
 146     {
 147         *Partition = 1;
 148         *PathSyntax = 1;
 149         return TRUE;
 150     }
 151     /* Detect multi()disk()fdisk() */
 152     else if (sscanf(ArcPath, "multi(%lu)disk(%lu)fdisk(%lu)", x, y, z) == 3)
 153     {
 154         *Partition = 1;
 155         *PathSyntax = 1;
 156         return TRUE;
 157     }
 158
 159     /* Unknown syntax */
 160     return FALSE;
 161 }
 162
 163 VOID ConstructArcPath(PCHAR ArcPath, PCHAR SystemFolder, ULONG Disk, ULONG Partition)
 164 {
 165         char    tmp[50];
 166
 167         strcpy(ArcPath, "multi(0)disk(0)");
 168
 169         if (Disk < 0x80)
 170         {
 171                 /*
 172                  * floppy disk path:
 173                  *  multi(0)disk(0)fdisk(x)\path
 174                  */
 175                 sprintf(tmp, "fdisk(%d)", (int) Disk);
 176                 strcat(ArcPath, tmp);
 177         }
 178         else
 179         {
 180                 /*
 181                  * hard disk path:
 182                  *  multi(0)disk(0)rdisk(x)partition(y)\path
 183                  */
 184                 sprintf(tmp, "rdisk(%d)partition(%d)", (int) (Disk - 0x80), (int) Partition);
 185                 strcat(ArcPath, tmp);
 186         }
 187
 188         if (SystemFolder[0] == '\\' || SystemFolder[0] == '/')
 189         {
 190                 strcat(ArcPath, SystemFolder);
 191         }
 192         else
 193         {
 194                 strcat(ArcPath, "\\");
 195                 strcat(ArcPath, SystemFolder);
 196         }
 197 }
 198
 199 ULONG ConvertArcNameToBiosDriveNumber(PCHAR ArcPath)
 200 {
 201         char *  p;
 202         ULONG           DriveNumber = 0;
 203
 204         if (_strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
 205                 return 0;
 206
 207         p = ArcPath + 15;
 208         if (_strnicmp(p, "fdisk(", 6) == 0)
 209         {
 210                 /*
 211                  * floppy disk path:
 212                  *  multi(0)disk(0)fdisk(x)\path
 213                  */
 214                 p = p + 6;
 215                 DriveNumber = atoi(p);
 216         }
 217         else if (_strnicmp(p, "rdisk(", 6) == 0)
 218         {
 219                 /*
 220                  * hard disk path:
 221                  *  multi(0)disk(0)rdisk(x)partition(y)\path
 222                  */
 223                 p = p + 6;
 224                 DriveNumber = atoi(p) + 0x80;
 225         }
 226
 227         return DriveNumber;
 228 }