reactos/boot/freeldr/freeldr/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, UCHAR* BootDrive, ULONG* BootPartition)
  25 {
  26     char *p;
  27
  28     /* Detect ramdisk path */
  29     if (_strnicmp(ArcPath, "ramdisk(0)", 10) == 0)
  30     {
  31         /* Magic value for ramdisks */
  32         *BootDrive = 0x49;
  33         *BootPartition = 1;
  34
  35         /* Get the path */
  36         p = ArcPath + 11;
  37         strcpy(BootPath, p);
  38         return TRUE;
  39     }
  40
  41     if (_strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
  42         return FALSE;
  43
  44     p = ArcPath + 15;
  45     if (_strnicmp(p, "fdisk(", 6) == 0)
  46     {
  47         /*
  48          * Floppy disk path:
  49          *  multi(0)disk(0)fdisk(x)\path
  50          */
  51         p = p + 6;
  52         *BootDrive = atoi(p);
  53         p = strchr(p, ')');
  54         if (p == NULL)
  55             return FALSE;
  56         p++;
  57         *BootPartition = 0;
  58     }
  59     else if (_strnicmp(p, "cdrom(", 6) == 0)
  60     {
  61         /*
  62          * Cdrom path:
  63          *  multi(0)disk(0)cdrom(x)\path
  64          */
  65         p = p + 6;
  66         *BootDrive = atoi(p) + 0x80;
  67         p = strchr(p, ')');
  68         if (p == NULL)
  69             return FALSE;
  70         p++;
  71         *BootPartition = 0xff;
  72     }
  73     else if (_strnicmp(p, "rdisk(", 6) == 0)
  74     {
  75         /*
  76          * Hard disk path:
  77          *  multi(0)disk(0)rdisk(x)partition(y)\path
  78          */
  79         p = p + 6;
  80         *BootDrive = atoi(p) + 0x80;
  81         p = strchr(p, ')');
  82         if ((p == NULL) || (_strnicmp(p, ")partition(", 11) != 0))
  83             return FALSE;
  84         p = p + 11;
  85         *BootPartition = atoi(p);
  86         p = strchr(p, ')');
  87         if (p == NULL)
  88             return FALSE;
  89         p++;
  90     }
  91     else
  92     {
  93         return FALSE;
  94     }
  95
  96     strcpy(BootPath, p);
  97
  98     return TRUE;
  99 }
 100
 101 /* PathSyntax: scsi() = 0, multi() = 1, ramdisk() = 2 */
 102 BOOLEAN
 103 DissectArcPath2(
 104     IN CHAR* ArcPath,
 105     OUT ULONG* x,
 106     OUT ULONG* y,
 107     OUT ULONG* z,
 108     OUT ULONG* Partition,
 109     OUT ULONG *PathSyntax)
 110 {
 111     /* Detect ramdisk() */
 112     if (_strnicmp(ArcPath, "ramdisk(0)", 10) == 0)
 113     {
 114         *x = *y = *z = 0;
 115         *Partition = 1;
 116         *PathSyntax = 2;
 117         return TRUE;
 118     }
 119     /* Detect scsi()disk()rdisk()partition() */
 120     else if (sscanf(ArcPath, "scsi(%lu)disk(%lu)rdisk(%lu)partition(%lu)", x, y, z, Partition) == 4)
 121     {
 122         *PathSyntax = 0;
 123         return TRUE;
 124     }
 125     /* Detect scsi()cdrom()fdisk() */
 126     else if (sscanf(ArcPath, "scsi(%lu)cdrom(%lu)fdisk(%lu)", x, y, z) == 3)
 127     {
 128         *Partition = 0;
 129         *PathSyntax = 0;
 130         return TRUE;
 131     }
 132     /* Detect multi()disk()rdisk()partition() */
 133     else if (sscanf(ArcPath, "multi(%lu)disk(%lu)rdisk(%lu)partition(%lu)", x, y, z, Partition) == 4)
 134     {
 135         *PathSyntax = 1;
 136         return TRUE;
 137     }
 138     /* Detect multi()disk()cdrom() */
 139     else if (sscanf(ArcPath, "multi(%lu)disk(%lu)cdrom(%lu)", x, y, z) == 3)
 140     {
 141         *Partition = 1;
 142         *PathSyntax = 1;
 143         return TRUE;
 144     }
 145     /* Detect multi()disk()fdisk() */
 146     else if (sscanf(ArcPath, "multi(%lu)disk(%lu)fdisk(%lu)", x, y, z) == 3)
 147     {
 148         *Partition = 1;
 149         *PathSyntax = 1;
 150         return TRUE;
 151     }
 152
 153     /* Unknown syntax */
 154     return FALSE;
 155 }
 156
 157 VOID ConstructArcPath(PCHAR ArcPath, PCHAR SystemFolder, UCHAR Disk, ULONG Partition)
 158 {
 159     char    tmp[50];
 160
 161     strcpy(ArcPath, "multi(0)disk(0)");
 162
 163     if (Disk < 0x80)
 164     {
 165         /*
 166          * Floppy disk path:
 167          *  multi(0)disk(0)fdisk(x)\path
 168          */
 169         sprintf(tmp, "fdisk(%d)", (int) Disk);
 170         strcat(ArcPath, tmp);
 171     }
 172     else
 173     {
 174         /*
 175          * Hard disk path:
 176          *  multi(0)disk(0)rdisk(x)partition(y)\path
 177          */
 178         sprintf(tmp, "rdisk(%d)partition(%d)", (int) (Disk - 0x80), (int) Partition);
 179         strcat(ArcPath, tmp);
 180     }
 181
 182     if (SystemFolder[0] == '\\' || SystemFolder[0] == '/')
 183     {
 184         strcat(ArcPath, SystemFolder);
 185     }
 186     else
 187     {
 188         strcat(ArcPath, "\\");
 189         strcat(ArcPath, SystemFolder);
 190     }
 191 }
 192
 193 #if 0
 194 UCHAR ConvertArcNameToBiosDriveNumber(PCHAR ArcPath)
 195 {
 196     char *    p;
 197     UCHAR        DriveNumber = 0;
 198
 199     if (_strnicmp(ArcPath, "multi(0)disk(0)", 15) != 0)
 200         return 0;
 201
 202     p = ArcPath + 15;
 203     if (_strnicmp(p, "fdisk(", 6) == 0)
 204     {
 205         /*
 206          * Floppy disk path:
 207          *  multi(0)disk(0)fdisk(x)\path
 208          */
 209         p = p + 6;
 210         DriveNumber = atoi(p);
 211     }
 212     else if (_strnicmp(p, "rdisk(", 6) == 0)
 213     {
 214         /*
 215          * Hard disk path:
 216          *  multi(0)disk(0)rdisk(x)partition(y)\path
 217          */
 218         p = p + 6;
 219         DriveNumber = atoi(p) + 0x80;
 220     }
 221
 222     return DriveNumber;
 223 }
 224 #endif