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Documented previously unknown fields and implemented actual ability to access files in the file system

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This commit is contained in:
Michael Becker 2014-11-28 00:46:21 -05:00
parent 16978e7433
commit 1923c141cf
1 changed files with 48 additions and 30 deletions
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78
CSharp/Plugins/UniversalEditor.Plugins.FileSystem/DataFormats/FileSystem/ISO/ISODataFormat.cs
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@ -75,8 +75,6 @@ namespace UniversalEditor.DataFormats.FileSystem.ISO
FileSystemObjectModel fsom = (objectModel as FileSystemObjectModel);
IO.Reader br = base.Accessor.Reader;
br.Seek(0, SeekOrigin.Begin);
// skip system area (32768 bytes... WHY???)
br.Accessor.Seek(32768, SeekOrigin.Current);
@ -92,33 +90,33 @@ namespace UniversalEditor.DataFormats.FileSystem.ISO
switch (type)
{
case ISOVolumeDescriptorType.Primary:
{
Internal.PrimaryVolumeDescriptor descriptor = ReadPrimaryVolumeDescriptor(br);
mvarSystemName = descriptor.systemName;
mvarVolumeName = descriptor.volumeName;
mvarVolumeSetSize = descriptor.volumeSetSize;
mvarVolumeSequenceNumber = descriptor.volumeSequenceNumber;
mvarLogicalBlockSize = descriptor.logicalBlockSize;
mvarVolumeSet = descriptor.volumeSet;
mvarPublisher = descriptor.publisher;
mvarDataPreparer = descriptor.dataPreparer;
mvarApplication = descriptor.application;
mvarCopyrightFile = descriptor.copyrightFile;
mvarAbstractFile = descriptor.abstractFile;
mvarBibliographicFile = descriptor.bibliographicFile;
pathTableLocationTypeL = descriptor.pathTableLocationTypeL;
pathTableLocationTypeM = descriptor.pathTableLocationTypeM;
break;
}
{
Internal.PrimaryVolumeDescriptor descriptor = ReadPrimaryVolumeDescriptor(br);
mvarSystemName = descriptor.systemName;
mvarVolumeName = descriptor.volumeName;
mvarVolumeSetSize = descriptor.volumeSetSize;
mvarVolumeSequenceNumber = descriptor.volumeSequenceNumber;
mvarLogicalBlockSize = descriptor.logicalBlockSize;
mvarVolumeSet = descriptor.volumeSet;
mvarPublisher = descriptor.publisher;
mvarDataPreparer = descriptor.dataPreparer;
mvarApplication = descriptor.application;
mvarCopyrightFile = descriptor.copyrightFile;
mvarAbstractFile = descriptor.abstractFile;
mvarBibliographicFile = descriptor.bibliographicFile;
pathTableLocationTypeL = descriptor.pathTableLocationTypeL;
pathTableLocationTypeM = descriptor.pathTableLocationTypeM;
break;
}
case ISOVolumeDescriptorType.Terminator:
{
break;
}
{
break;
}
default:
{
br.Accessor.Seek(2041, SeekOrigin.Current);
break;
}
{
br.Accessor.Seek(2041, SeekOrigin.Current);
break;
}
}
if (type == ISOVolumeDescriptorType.Terminator) break;
}
@ -150,21 +148,41 @@ namespace UniversalEditor.DataFormats.FileSystem.ISO
{ // file 1 file 2
ushort unknown1 = br.ReadUInt16(); // 48 42
if (unknown1 == 0) break;
// index of first sector (offset is firstSector * mvarLogicalBlockSize
uint firstSector = br.ReadDoubleEndianUInt32(); // 21 22
// actual size of the file
uint dataLength = br.ReadDoubleEndianUInt32(); // 44 20
uint unknown2 = br.ReadDoubleEndianUInt32(); // 21 22
uint unknown3 = br.ReadDoubleEndianUInt32(); // 44 20
ulong unknown4 = br.ReadUInt64(); // ...
ushort unknown5 = br.ReadUInt16(); // 0 0
ushort unknown6 = br.ReadUInt16(); // 1 1
ushort unknown7 = br.ReadUInt16(); // 256 256
string fileName = br.ReadLengthPrefixedString();
byte nulTerminator = br.ReadByte();
if (fileName.Length % 2 == 0) br.ReadByte();
File file = fsom.AddFile(fileName);
file.Size = dataLength;
file.Properties.Add("reader", br);
file.Properties.Add("sector", firstSector);
file.Properties.Add("length", dataLength);
file.DataRequest += file_DataRequest;
}
}
private void file_DataRequest(object sender, DataRequestEventArgs e)
{
File file = (sender as File);
Reader reader = (Reader)file.Properties["reader"];
uint sector = (uint)file.Properties["sector"];
uint length = (uint)file.Properties["length"];
reader.Seek((long)(mvarLogicalBlockSize * sector), SeekOrigin.Begin);
e.Data = reader.ReadBytes(length);
}
private Internal.PrimaryVolumeDescriptor ReadPrimaryVolumeDescriptor(IO.Reader br)
{
Internal.PrimaryVolumeDescriptor descriptor = new Internal.PrimaryVolumeDescriptor();