public void Dispose()
{
if (this.isDisposed)
{
return;
}
if (this.tableStream != null)
{
foreach (var table in this.tableStream.Values)
{
table.Dispose();
}
this.tableStream._Clear();
}
if (this.sourceImage != null)
{
this.sourceImage.Dispose();
}
if (this.blob != null)
{
this.blob.Dispose();
this.blob = null;
}
if (this.strings != null)
{
this.strings.Dispose();
this.strings = null;
}
if (this.propertySemantics != null)
{
this.propertySemantics = null;
}
if (this.eventSemantics != null)
{
this.eventSemantics = null;
}
this.isDisposed = true;
}
/// <summary>
/// Reads the root structure from the metadata.
/// </summary>
/// <param name="header">The <see cref="CliHeader"/> which denotes the location of the information.</param>
/// <param name="originalStream">The <see cref="FileStream"/> being read from.</param>
/// <param name="reader">The <see cref="EndianAwareBinaryReader"/> which handles reads.</param>
/// <param name="relativeVirtualAddress">The <see cref="UInt32"/> value which denotes the relative
/// virtual address of the metadata header.</param>
/// <param name="sourceImage"></param>
internal void Read(CliHeader header, FileStream originalStream, EndianAwareBinaryReader reader, uint relativeVirtualAddress, PEImage sourceImage)
{
this.originalStream = originalStream;
this.header = header;
this.streamPosition = relativeVirtualAddress;
this.signature = reader.ReadUInt32();
if (this.signature != metadataSignature)
{
throw new BadImageFormatException();
}
this.depreciatedVersion.Read(reader);
this.reserved = reader.ReadUInt32();
this.realVersionLength = reader.ReadInt32();
byte[] version = new byte[(this.realVersionLength + 3) & ~3];//Make it a multiple of four.
reader.Read(version, 0, version.Length);
this.version = version;
this.reservedFlags = reader.ReadUInt16();
int streamCount = 0;
streamCount = reader.ReadUInt16();
this.sourceImage = sourceImage;
for (int i = 0; i < streamCount; i++)
{
var currentHeader = new CliMetadataStreamHeader();
currentHeader.Read(reader, sourceImage);
switch (currentHeader.Name)
{
case "#Strings":
if (this.strings != null)
{
goto sectionExists;
}
this.strings = new CliMetadataStringsHeaderAndHeap(currentHeader, sourceImage.SyncObject);
this.ScanAndReadSection(sourceImage, strings, this.strings.Read);
break;
case "#Blob":
if (this.blob != null)
{
goto sectionExists;
}
this.blob = new CliMetadataBlobHeaderAndHeap(currentHeader, this);
this.ScanAndReadSection(sourceImage, blob, this.blob.Read);
break;
case "#US":
if (this.userStrings != null)
{
goto sectionExists;
}
this.userStrings = new CliMetadataUserStringsHeaderAndHeap(currentHeader, sourceImage.SyncObject);
this.ScanAndReadSection(sourceImage, this.userStrings, this.userStrings.Read);
break;
case "#GUID":
if (this.guids != null)
{
goto sectionExists;
}
this.guids = new CliMetadataGuidHeaderAndHeap(currentHeader, sourceImage.SyncObject);
this.ScanAndReadSection(sourceImage, guids, this.guids.Read);
break;
case "#-": //https://github.com/jbevain/cecil/blob/8b689ecdc890cbf3715ba8775de1d713d71f09f3/Mono.Cecil.PE/ImageReader.cs#L359
case "#~":
if (this.tableStream != null)
{
goto sectionExists;
}
this.tableStream = new CliMetadataTableStreamAndHeader(currentHeader);
this.ScanAndReadSection(sourceImage, tableStream, sdReader => this.tableStream.Read(sdReader, this));
break;
}
continue;
sectionExists:
throw new BadImageFormatException(string.Format("Duplicate {0} section encountered.", currentHeader.Name));
}
if (this.tableStream == null)
{
throw new BadImageFormatException("#~ or #- stream not present in image.");
}
}
