private void GenPathTableEx(IsoFolder parentFolder, IsoFolder thisFolder, bool lsb)
{
var di = new FieldValidator(generator);
// Path table record ( ECMA-119 section 9.4 )
byte[] b_di = generator.IsoName(thisFolder.Name, true);
di.Byte((byte)b_di.Length, 1);
di.Byte(0, 2); // Extended Attribute Record Length
if (lsb)
{
di.IntLSB(thisFolder.DataBlock, 3, 6); // Location of Extent
di.ShortLSB(parentFolder.PathTableEntry, 7, 8); // Parent Directory Number
}
else
{
di.IntMSB(thisFolder.DataBlock, 3, 6); // Location of Extent
di.ShortMSB(parentFolder.PathTableEntry, 7, 8); // Parent Directory Number
}
di.Bytes(b_di, 9, 8 + b_di.Length); // Directory Identifier
if ((b_di.Length & 1) != 0)
di.Byte(0, 9 + b_di.Length); // optional padding if LEN_DI is odd
foreach (KeyValuePair<string, IsoEntry> it in thisFolder.entries)
if (it.Value.IsFolder)
GenPathTableEx(thisFolder, (IsoFolder)it.Value, lsb);
}
private void GenBootRecordDescriptor() // ( ISO 9660 - 8.2, El Torito Figure 7 )
{
var br = new FieldValidator(generator);
br.Byte(0, 1); // Volume Descriptor Type ( 8.2.1 ), Boot Record Indicator - must be 0 ( offset 0x00 )
br.AString("CD001", 2, 6); // Standard Identifier ( 8.2.2 ), ( offset 0x01-0x05 )
br.Byte(1, 7); // Volume Descriptor Version ( 8.2.3 ), must be 1 for El Torito also ( offset 0x06 )
br.AString("EL TORITO SPECIFICATION", 8, 39, '\0'); // Boot System Identifier ( 8.2.4 ), ( offset 0x07-0x26 )
br.Zero(40, 71); // Boot Identifier ( 8.2.5 ), Unused - must be 0 ( offset 0x27-0x46 )
br.IntLSB(BootCatalog, 72, 75); // Boot System Use ( 8.2.6 ), Absolute Pointer to first sector of Boot Catalog ( offset 0x47-0x4A )
generator.FinishBlock();
}
private void GenBootCatalog(IsoFile f)
{
BootCatalog = generator.Index / LogicalBlockSize;
// write validation entry first... see El Torito section 2.1
var ve = new FieldValidator(generator);
ve.Byte(1, 1); // Header ID, must be 0x01
ve.Byte(0, 2); // 0 == x86 - TODO FIXME: 1 == PowerPC, 2 == Mac, see El Torito figure 2
ve.DupByte(0, 3, 4); // Reserved
ve.DupByte(0, 5, 0x1C); // Manufacturer/Developer of CD-ROM, see El Torito figure 2
ve.ShortLSB(0x55AA, 0x1D, 0x1E); // checksum - TODO FIXME - allow custom Manufacturer string - calculate checksum dynamically
ve.Byte(0x55, 0x1F); // 1st Key Byte
ve.Byte(0xAA, 0x20); // 2nd Key Byte
// initial/default entry... see El Torito section 2.2 and figure 3
var ide = new FieldValidator(generator);
ide.Byte(0x88, 1); // 0x88 = bootable, 0x00 = not bootable
// TODO FIXME - this is extremely hackish... fix me...
ide.Byte(0, 2); // no emulation
/*if ( f.fileInfo.Length <= 1182720 )
ide.Byte(1, 2); // 1.2 meg diskette
else if ( f.fileInfo.Length <= 1440 * 1024 )
ide.Byte(2,2); // 1.44 meg diskette
else if ( f.fileInfo.Length <= 2880 * 1024 )
ide.Byte(3,2); // 2.88 meg diskette
else
ide.Byte(4,2);*/
// Hard Disk ( drive 80 )
ide.ShortLSB(0, 3, 4); // Load Segment - 0 == default of 0x7C0
ide.Byte(0, 5); // System Type, according to El Torito figure 3 this MUST be a copy of the "System Type" from the boot image. In practice this appears to not be the case.
ide.Byte(0, 6); // Unused, must be 0
if (bootLoadSize == 0)
bootLoadSize = (short)((f.fileInfo.Length - 1) / 0x200 + 1);
ide.ShortLSB(bootLoadSize, 7, 8); // Sector Count
ide.IntLSB(boot.DataBlock, 9, 12); // Logical Block of boot image
ide.Zero(13, 32); // unused
generator.FinishBlock();
}
private void GenPrimaryVolumeDescriptor() // ( 8.4 )
{
PrimaryVolumeDescriptor = generator.Index / LogicalBlockSize;
var pvd = new FieldValidator(generator);
pvd.Byte(1, 1); // Volume Descriptor Type ( 8.4.1 )
pvd.AString("CD001", 2, 6); // Standard Identifier ( 8.4.2 )
pvd.Byte(1, 7); // Volume Descriptor Version ( 8.4.3 )
pvd.Zero(8, 8); // Unused Field ( 8.4.4 )
pvd.AString("?", 9, 40); // System Identifier ( 8.4.5 )
pvd.DString(volumeLabel, 41, 72); // Volume Identifier ( 8.4.6 )
pvd.Zero(73, 80); // Unused Field ( 8.4.7 )
pvd.IntLSBMSB((TotalSize + LogicalBlockSize - 1) / LogicalBlockSize, 81, 88); // Volume Space Size ( 8.4.8 )
pvd.Zero(89, 120); // Unused Field ( 8.4.9 )
pvd.ShortLSBMSB(1, 121, 124); // Volume Set Size ( 8.4.10 )
pvd.ShortLSBMSB(1, 125, 128); // Volume Sequence Number ( 8.4.11 )
pvd.ShortLSBMSB(LogicalBlockSize, 129, 132); // Logical Block Size ( 8.4.12 )
pvd.IntLSBMSB(PathTableSize, 133, 140); // Path Table Size ( 8.4.13 )
pvd.IntLSB(LPathTable, 141, 144); // L Path Table ( 8.4.14 )
pvd.IntLSB(0, 145, 148); // Optional L Path Table ( 8.4.15 )
pvd.IntMSB(MPathTable, 149, 152); // M Path Table ( 8.4.16 )
pvd.IntMSB(0, 153, 156); // Optional M Path Table ( 8.4.17 )
pvd.BeginField(157);
DirectoryRecord(".", isoRoot, 1); // Directory Record for Root Directory ( 8.4.18 )
pvd.EndField(190);
pvd.DupByte(0x20, 191, 318); // Volume Set Identifier ( 8.4.19 )
pvd.DupByte(0x20, 319, 446); // Publisher Identifier ( 8.4.20 )
pvd.DupByte(0x20, 447, 574); // Data Preparer ( 8.4.21 )
pvd.DupByte(0x20, 575, 702); // Application Identifier ( 8.4.22 )
pvd.DupByte(0x20, 703, 739); // Copyright File Identifier ( 8.4.23 )
pvd.DupByte(0x20, 740, 776); // Abstract File Identifier ( 8.4.24 )
pvd.DupByte(0x20, 777, 813); // Bibliographic File Identifier ( 8.4.25 )
System.DateTime now = System.DateTime.Now;
pvd.AnsiDateTime(now, 814, 830); // Volume Creation Date and Time ( 8.4.26 )
pvd.AnsiDateTime(now, 831, 847); // Volume Modification Date and Time ( 8.4.27 )
pvd.Zero(848, 864); // Volume Expiration Date and Time ( 8.4.28 )
pvd.Zero(865, 881); // Volume Effective Date and Time ( 8.4.29 )
pvd.Byte(1, 882); // File Structure Version ( 8.4.30 )
pvd.Zero(883, 883); // Reserved ( 8.4.31 )
pvd.Zero(884, 1395); // Application Use ( 8.4.32 )
pvd.Zero(1396, 2048); // Reserved for Future Standardization ( 8.4.33 )
}