private void GenFile(IsoFile f)
{
f.DataBlock = this.generator.Index / LogicalBlockSize;
f.DataLength = (int)f.fileInfo.Length;
this.generator.WriteFile(f, PrimaryVolumeDescriptor);
this.generator.FinishBlock();
}
private void GenBootCatalog(IsoFile f)
{
BootCatalog = this.generator.Index / LogicalBlockSize;
// write validation entry first... see El Torito section 2.1
var ve = new FieldValidator(this.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(this.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 (this.bootLoadSize == 0)
{
this.bootLoadSize = (short)((f.fileInfo.Length - 1) / 0x200 + 1);
}
ide.ShortLSB(this.bootLoadSize, 7, 8); // Sector Count
ide.IntLSB(this.boot.DataBlock, 9, 12); // Logical Block of boot image
ide.Zero(13, 32); // unused
this.generator.FinishBlock();
}
/// <summary>
/// writes a file out to cd. Generate the Boot Info Table if necessary
/// </summary>
/// <param Name="f">the file to write</param>
/// <param Name="primaryVolumeDescriptor">the PVD block, passed in case we need to generate the Boot Info Table</param>
public void WriteFile(IsoFile f, int primaryVolumeDescriptor)
{
if (f.fileInfo.Length > 0xffffffff)
{
throw new NotImplementedException(">4G files not implemented");
}
int bytes = (int)f.fileInfo.Length;
if (this.fs == null)
{
this.Index += bytes;
return;
}
// TODO FIXME - create smaller reusable buffer and read fixed-size chunks at a time...
byte[] b = new byte[bytes];
using (FileStream stream = f.fileInfo.OpenRead())
{
if (bytes != stream.Read(b, 0, bytes))
{
throw new Exception("number of bytes read from file != reported length of file: " + f.fileInfo.Name);
}
}
if (f.BootInfoTable)
{
// TODO FIXME - this is TERRIBLE. This should be implemented at a higher level, and
// doing it here requires passing the primaryVolumeDescriptor to every call of WriteFile()
// The reason it is here is because this is the only place where the file actually gets
// pulled into memory and I didn't want to modify the boot image on-disk like mkisofs does.
Bytes(b, 0, 8);
Bytes(ConvertTo.Int2LSB(primaryVolumeDescriptor));
Bytes(ConvertTo.Int2LSB(f.DataBlock));
Bytes(ConvertTo.Int2LSB((int)f.fileInfo.Length));
Bytes(ConvertTo.Int2LSB(0)); // TODO FIXME - checksum
DupByte(0, 40); // reserved
Bytes(b, 64, bytes - 64);
}
else
{
Bytes(b);
}
}
/// <summary>
/// add a file to the ISO ( common implementation - called by AddFile() and AddBootFile() )
/// </summary>
private IsoFile AddFileEx(string path, FileInfo fileInfo)
{
string key;
string[] ar = NormalizePath(path).Split('/');
int i;
IsoFolder f = this.isoRoot;
for (i = 0; i < ar.Length - 1; i++)
{
key = ar[i].Trim().ToLower();
if (!f.entries.ContainsKey(key))
{
var subf = new IsoFolder();
subf.Name = ar[i].Trim();
f.entries[key] = subf;
}
IsoEntry e = f.entries[key];
if (e.IsFile)
{
throw new Exception("cannot create directory \"" + ar[i].Trim() + "\", a file by that Name already exists");
//return;
}
f = (IsoFolder)e;
}
var x = new IsoFile(fileInfo);
x.Name = ar[i].Trim();
key = ar[i].Trim().ToLower();
if (f.entries.ContainsKey(key))
{
//throw new Exception("file or folder by that Name already exists");
return((IsoFile)f.entries[key]); // just don't add it for now...
}
f.entries[key] = x;
return(x);
}
private void GenFile(IsoFile f)
{
f.DataBlock = this.generator.Index / LogicalBlockSize;
f.DataLength = (int)f.fileInfo.Length;
this.generator.WriteFile(f, PrimaryVolumeDescriptor);
this.generator.FinishBlock();
}
private void GenBootCatalog(IsoFile f)
{
BootCatalog = this.generator.Index / LogicalBlockSize;
// write validation entry first... see El Torito section 2.1
var ve = new FieldValidator(this.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(this.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 (this.bootLoadSize == 0)
this.bootLoadSize = (short)((f.fileInfo.Length - 1) / 0x200 + 1);
ide.ShortLSB(this.bootLoadSize, 7, 8); // Sector Count
ide.IntLSB(this.boot.DataBlock, 9, 12); // Logical Block of boot image
ide.Zero(13, 32); // unused
this.generator.FinishBlock();
}
/// <summary>
/// add a file to the ISO ( common implementation - called by AddFile() and AddBootFile() )
/// </summary>
private IsoFile AddFileEx(string path, FileInfo fileInfo)
{
string key;
string[] ar = NormalizePath(path).Split('/');
int i;
IsoFolder f = this.isoRoot;
for (i = 0; i < ar.Length - 1; i++) {
key = ar[i].Trim().ToLower();
if (!f.entries.ContainsKey(key)) {
var subf = new IsoFolder();
subf.Name = ar[i].Trim();
f.entries[key] = subf;
}
IsoEntry e = f.entries[key];
if (e.IsFile) {
throw new Exception("cannot create directory \"" + ar[i].Trim() + "\", a file by that Name already exists");
//return;
}
f = (IsoFolder)e;
}
var x = new IsoFile(fileInfo);
x.Name = ar[i].Trim();
key = ar[i].Trim().ToLower();
if (f.entries.ContainsKey(key)) {
//throw new Exception("file or folder by that Name already exists");
return (IsoFile)f.entries[key]; // just don't add it for now...
}
f.entries[key] = x;
return x;
}
/// <summary>
/// writes a file out to cd. Generate the Boot Info Table if necessary
/// </summary>
/// <param Name="f">the file to write</param>
/// <param Name="primaryVolumeDescriptor">the PVD block, passed in case we need to generate the Boot Info Table</param>
public void WriteFile(IsoFile f, int primaryVolumeDescriptor)
{
if (f.fileInfo.Length > 0xffffffff)
throw new NotImplementedException(">4G files not implemented");
int bytes = (int)f.fileInfo.Length;
if (this.fs == null)
{
this.Index += bytes;
return;
}
// TODO FIXME - create smaller reusable buffer and read fixed-size chunks at a time...
byte[] b = new byte[bytes];
using (FileStream stream = f.fileInfo.OpenRead())
{
if (bytes != stream.Read(b, 0, bytes))
throw new Exception("number of bytes read from file != reported length of file: " + f.fileInfo.Name);
}
if (f.BootInfoTable)
{
// TODO FIXME - this is TERRIBLE. This should be implemented at a higher level, and
// doing it here requires passing the primaryVolumeDescriptor to every call of WriteFile()
// The reason it is here is because this is the only place where the file actually gets
// pulled into memory and I didn't want to modify the boot image on-disk like mkisofs does.
Bytes(b, 0, 8);
Bytes(ConvertTo.Int2LSB(primaryVolumeDescriptor));
Bytes(ConvertTo.Int2LSB(f.DataBlock));
Bytes(ConvertTo.Int2LSB((int)f.fileInfo.Length));
Bytes(ConvertTo.Int2LSB(0)); // TODO FIXME - checksum
DupByte(0, 40); // reserved
Bytes(b, 64, bytes - 64);
}
else
Bytes(b);
}
private string DirectoryRecordEx(byte[] fileName, string realName, IsoEntry e, byte root, bool secondPass)
{
byte[] /*b_fi,*/ b_su = null;
/*if (fileName == ".")
* {
* b_fi = new byte[] { 0 };
* realName = "";
* }
* else if (fileName == "..")
* {
* b_fi = new byte[] { 1 };
* realName = "";
* }
* else
* b_fi = generator.Ascii.GetBytes(fileName);*/
byte LEN_FI = (byte)fileName.Length;
byte LEN_DR = (byte)(33 + LEN_FI);
bool fi_padding = ((LEN_DR & 1) != 0);
if (fi_padding)
{
LEN_DR++;
}
// as much as I HATE to do it, I have to generate this data in both passes for now.
// I don't yet understand enough about what and how many DR entries have to be made to figure out how to do it "right"
byte LEN_SU = 0;
#if ROCKRIDGE
if (root != 1) // don't generate susp on PVD's root entry...
{
b_su = Susp(ref realName, e, root == 2, secondPass, (byte)(255 - LEN_DR));
if (b_su.Length > 255)
{
throw new NotImplementedException("can't yet handle SUSP > 255 bytes");
}
LEN_SU = (byte)b_su.Length;
}
else
{
realName = "";
}
#endif
LEN_DR += LEN_SU;
var dr = new FieldValidator(this.generator);
dr.Byte(LEN_DR, 1); // Length of Directory Record ( 9.1.1 )
dr.Byte(0, 2); // Extended Attribute Record Length ( 9.1.2 )
dr.IntLSBMSB(e.DataBlock, 3, 10); // Location of Extent ( 9.1.3 )
#if true
// in this test - I round the data length up to the next multiple of 2048, didn't help fix my booting problem though...
dr.IntLSBMSB(((e.DataLength - 1) / 2048 + 1) * 2048, 11, 18); // Data Length ( 9.1.4 )
#else
dr.IntLSBMSB(e.DataLength, 11, 18); // Data Length ( 9.1.4 )
#endif
dr.BinaryDateTime(System.DateTime.Now, 19, 25); // Recording Date and Time ( 9.1.5 )
byte flags = 0;
if (e.IsFile)
{
IsoFile f = (IsoFile)e;
if ((f.fileInfo.Attributes & FileAttributes.Hidden) != 0)
{
flags |= 1; // hidden
}
}
else
{
// TODO FIXME - not supporting hidden folders right now
//IsoFolder f = (IsoFolder)e;
//if ((f.dirInfo.Attributes & DirectoryAttributes.Hidden) != 0)
// flags |= 1; // hidden
}
if (e.IsFolder)
{
flags |= 2; // directory
}
#if false // I'm disabling this because analysing of a working ISO never sets this bit...
if (real_name.Length == 0)
{
flags |= 128; // final
}
#endif
dr.Byte(flags, 26); // flags ( 9.1.6 )
dr.Byte(0, 27); // File Unit Size ( 9.1.7 )
dr.Byte(0, 28); // Interleave Gap Size ( 9.1.8 )
dr.ShortLSBMSB(1, 29, 32); // Volume Sequence Number ( 9.1.9 )
dr.Byte(LEN_FI, 33); // Length of File Identifier ( 9.1.10 )
dr.Bytes(fileName, 34, 33 + LEN_FI);
if (fi_padding)
{
dr.Zero(34 + LEN_FI, 34 + LEN_FI);
}
if (LEN_SU > 0)
{
dr.Bytes(b_su, LEN_DR - LEN_SU + 1, LEN_DR);
}
return(realName);
}
