internal bool ReadEntry()
{
var tailLength = this.tailLength;
if (tailLength + 1 >= this.Size)
{
return(false);
}
byte compressedIntBytes = 0;
byte[] currentData = null;
int currentDataCount = 0;
currentDataCount = CliMetadataFixedRoot.ReadCompressedUnsignedInt(reader, out compressedIntBytes);
if (tailLength + compressedIntBytes >= this.Size)
{
reader.BaseStream.Seek(-(tailLength + compressedIntBytes - this.Size), SeekOrigin.Current);
return(false);
}
else
{
tailLength += compressedIntBytes;
}
if (currentDataCount == 0)
{
/* *
* Reached the end of the heap which is padded
* with zeroes until the next 4-byte boundry.
* */
return(false);
}
if (tailLength + currentDataCount > this.Size)
{
throw new BadImageFormatException(string.Format("The data within the {0} heap entry is longer than expected.", this.Name));
}
currentData = new byte[currentDataCount];
for (int i = 0; i < currentDataCount && tailLength < this.Size; i++, tailLength++)
{
currentData[i] = reader.ReadByte();
}
this.AddData(this.GetData(currentData), compressedIntBytes);
if (tailLength >= this.Size)
{
return(false);
}
return(true);
}
internal void Read(EndianAwareBinaryReader reader)
{
this.syncObject = this.metadataRoot.SourceImage.SyncObject;
lock (this.syncObject)
{
byte[] blobSectionData = new byte[this.Size];
reader.Read(blobSectionData, 0, blobSectionData.Length);
MemoryStream blobStream = new MemoryStream(blobSectionData);
this.reader = new EndianAwareBinaryReader(blobStream, Endianness.LittleEndian, false);
this.blobStream = blobStream;
//this.reader = new EndianAwareBinaryReader(reader.BaseStream, Endianness.LittleEndian, false);
byte firstNull = (byte)(this.reader.PeekByte() & 0xFF);
if (firstNull != 0)
{
throw new BadImageFormatException(string.Format("The first item of a {0} heap must be null.", this.Name));
}
this.smallEntries.Add(0, new SmallBlobEntry(1)
{
BlobData = new byte[this.reader.ReadByte()]
});
byte currentItemLengthWidth;
long currentPosition = 1;
while (currentPosition < this.Size)
{
int currentLength = CliMetadataFixedRoot.ReadCompressedUnsignedInt(this.reader, out currentItemLengthWidth);
if (currentItemLengthWidth == 1)
{
this.smallEntries.Add((uint)currentPosition, new SmallBlobEntry((sbyte)currentLength));
}
else if (currentItemLengthWidth == 2)
{
this.mediumEntries.Add((uint)currentPosition, new MediumBlobEntry((short)currentLength));
}
else
{
this.largEntries.Add((uint)currentPosition, new LargeBlobEntry(currentLength));
}
if (currentPosition + currentItemLengthWidth + currentLength > this.Size)
{
break;
}
currentPosition += currentItemLengthWidth + currentLength;
this.reader.BaseStream.Seek(currentLength, SeekOrigin.Current);
}
}
}
public CliMetadataBlobHeaderAndHeap(CliMetadataStreamHeader originalHeader, CliMetadataFixedRoot metadataRoot)
: base(originalHeader)
{
this.metadataRoot = metadataRoot;
}