private void WriteAlignedBlobHeap(BlobBuilder builder)
{
int alignment = BitArithmetic.Align(_blobHeapSize, 4) - _blobHeapSize;
var writer = new BlobWriter(builder.ReserveBytes(_blobHeapSize + alignment));
// Perf consideration: With large heap the following loop may cause a lot of cache misses
// since the order of entries in _blobs dictionary depends on the hash of the array values,
// which is not correlated to the heap index. If we observe such issue we should order
// the entries by heap position before running this loop.
int startOffset = _blobHeapStartOffset;
foreach (var entry in _blobs)
{
int heapOffset = entry.Value.GetHeapOffset();
var blob = entry.Key;
writer.Offset = (heapOffset == 0) ? 0 : heapOffset - startOffset;
writer.WriteCompressedInteger(blob.Length);
writer.WriteBytes(blob);
}
writer.Offset = _blobHeapSize;
writer.WriteBytes(0, alignment);
}
// TODO:
// WriteBytes(byte*)
// WriteBytes(stream)
// WriteBytes(byte[])
// WriteBytes(IA<byte>)
// WriteReference
private static void TestCompressedUnsignedInteger(byte[] expected, int value)
{
var writer = new BlobWriter(4);
writer.WriteCompressedInteger(value);
AssertEx.Equal(expected, writer.ToArray());
var builder = new BlobBuilder();
builder.WriteCompressedInteger(value);
AssertEx.Equal(expected, builder.ToArray());
}
public void CompressUnsignedIntegersFromSpecExamples()
{
// These examples are straight from the CLI spec.
TestCompressedUnsignedInteger(new byte[] { 0x00 }, 0);
TestCompressedUnsignedInteger(new byte[] { 0x03 }, 0x03);
TestCompressedUnsignedInteger(new byte[] { 0x7f }, 0x7F);
TestCompressedUnsignedInteger(new byte[] { 0x80, 0x80 }, 0x80);
TestCompressedUnsignedInteger(new byte[] { 0xAE, 0x57 }, 0x2E57);
TestCompressedUnsignedInteger(new byte[] { 0xBF, 0xFF }, 0x3FFF);
TestCompressedUnsignedInteger(new byte[] { 0xC0, 0x00, 0x40, 0x00 }, 0x4000);
TestCompressedUnsignedInteger(new byte[] { 0xDF, 0xFF, 0xFF, 0xFF }, 0x1FFFFFFF);
var writer = new BlobWriter(4);
var builder = new BlobBuilder();
Assert.Throws <ArgumentOutOfRangeException>(() => writer.WriteCompressedInteger(-1));
Assert.Throws <ArgumentOutOfRangeException>(() => writer.WriteCompressedInteger(BlobWriterImpl.MaxCompressedIntegerValue + 1));
Assert.Throws <ArgumentOutOfRangeException>(() => builder.WriteCompressedInteger(-1));
Assert.Throws <ArgumentOutOfRangeException>(() => builder.WriteCompressedInteger(BlobWriterImpl.MaxCompressedIntegerValue + 1));
}
private void WriteBlobHeap(BlobBuilder builder)
{
var writer = new BlobWriter(builder.ReserveBytes(_blobHeapSize));
// Perf consideration: With large heap the following loop may cause a lot of cache misses
// since the order of entries in _blobs dictionary depends on the hash of the array values,
// which is not correlated to the heap index. If we observe such issue we should order
// the entries by heap position before running this loop.
foreach (var entry in _blobs)
{
int heapOffset = MetadataTokens.GetHeapOffset(entry.Value);
var blob = entry.Key;
writer.Offset = heapOffset;
writer.WriteCompressedInteger(blob.Length);
writer.WriteBytes(blob);
}
}
private void WriteBlobHeap(BlobBuilder builder)
{
var writer = new BlobWriter(builder.ReserveBytes(_blobHeapSize));
// Perf consideration: With large heap the following loop may cause a lot of cache misses
// since the order of entries in _blobs dictionary depends on the hash of the array values,
// which is not correlated to the heap index. If we observe such issue we should order
// the entries by heap position before running this loop.
foreach (var entry in _blobs)
{
int heapOffset = MetadataTokens.GetHeapOffset(entry.Value);
var blob = entry.Key;
writer.Offset = heapOffset;
writer.WriteCompressedInteger(blob.Length);
writer.WriteBytes(blob);
}
}
private void InitializeValueAndSignature()
{
var mdReader = _symReader.MetadataReader;
var constant = mdReader.GetLocalConstant(_handle);
var sigReader = mdReader.GetBlobReader(constant.Signature);
var sigWriter = new BlobWriter(sigReader.Length);
// custom modifiers:
int rawTypeCode;
while (true)
{
rawTypeCode = sigReader.ReadCompressedInteger();
if (rawTypeCode == (int)SignatureTypeCode.OptionalModifier || rawTypeCode == (int)SignatureTypeCode.RequiredModifier)
{
sigReader.ReadCompressedInteger();
}
else
{
break;
}
}
int customModifiersLength = sigReader.Offset - 1;
if (customModifiersLength > 0)
{
sigWriter.Write(mdReader.GetBlobBytes(constant.Signature), 0, customModifiersLength);
}
object translatedValue;
if (rawTypeCode == (int)MetadataUtilities.SignatureTypeCode_ValueType ||
rawTypeCode == (int)MetadataUtilities.SignatureTypeCode_Class)
{
var typeHandle = sigReader.ReadTypeHandle();
if (sigReader.RemainingBytes == 0)
{
// null reference is returned as a boxed integer 0:
translatedValue = NullReferenceValue;
}
else
{
string qualifiedName = _symReader.PdbReader.GetMetadataImport().GetQualifiedTypeName(typeHandle);
if (qualifiedName == "System.Decimal")
{
translatedValue = sigReader.ReadDecimal();
}
else if (qualifiedName == "System.DateTime")
{
translatedValue = BitConverter.Int64BitsToDouble(sigReader.ReadDateTime().Ticks);
}
else
{
// unknown (not produced by C# or VB)
translatedValue = null;
}
}
sigWriter.Write((byte)rawTypeCode);
sigWriter.WriteCompressedInteger(MetadataUtilities.GetTypeDefOrRefOrSpecCodedIndex(typeHandle));
}
else
{
bool isEnumTypeCode;
translatedValue = ReadAndTranslateValue(ref sigReader, (SignatureTypeCode)rawTypeCode, out isEnumTypeCode);
if (sigReader.RemainingBytes == 0)
{
// primitive type code:
sigWriter.Write((byte)rawTypeCode);
}
else if (isEnumTypeCode)
{
var enumTypeHandle = sigReader.ReadTypeHandle();
// enum type signature:
sigWriter.Write((byte)MetadataUtilities.SignatureTypeCode_ValueType);
sigWriter.WriteCompressedInteger(MetadataUtilities.GetTypeDefOrRefOrSpecCodedIndex(enumTypeHandle));
}
else
{
throw new BadImageFormatException();
}
}
_lazyValue = translatedValue;
_lazySignature = sigWriter.ToArray();
}
public void CompressUnsignedIntegersFromSpecExamples()
{
// These examples are straight from the CLI spec.
TestCompressedUnsignedInteger(new byte[] { 0x00 }, 0);
TestCompressedUnsignedInteger(new byte[] { 0x03 }, 0x03);
TestCompressedUnsignedInteger(new byte[] { 0x7f }, 0x7F);
TestCompressedUnsignedInteger(new byte[] { 0x80, 0x80 }, 0x80);
TestCompressedUnsignedInteger(new byte[] { 0xAE, 0x57 }, 0x2E57);
TestCompressedUnsignedInteger(new byte[] { 0xBF, 0xFF }, 0x3FFF);
TestCompressedUnsignedInteger(new byte[] { 0xC0, 0x00, 0x40, 0x00 }, 0x4000);
TestCompressedUnsignedInteger(new byte[] { 0xDF, 0xFF, 0xFF, 0xFF }, 0x1FFFFFFF);
var writer = new BlobWriter(4);
var builder = new BlobBuilder();
Assert.Throws<ArgumentOutOfRangeException>(() => writer.WriteCompressedInteger(-1));
Assert.Throws<ArgumentOutOfRangeException>(() => writer.WriteCompressedInteger(BlobWriterImpl.MaxCompressedIntegerValue + 1));
Assert.Throws<ArgumentOutOfRangeException>(() => builder.WriteCompressedInteger(-1));
Assert.Throws<ArgumentOutOfRangeException>(() => builder.WriteCompressedInteger(BlobWriterImpl.MaxCompressedIntegerValue + 1));
}
// TODO:
// WriteBytes(byte*)
// WriteBytes(stream)
// WriteBytes(byte[])
// WriteBytes(IA<byte>)
// WriteReference
private static void TestCompressedUnsignedInteger(byte[] expected, int value)
{
var writer = new BlobWriter(4);
writer.WriteCompressedInteger(value);
AssertEx.Equal(expected, writer.ToArray());
var builder = new BlobBuilder();
builder.WriteCompressedInteger(value);
AssertEx.Equal(expected, builder.ToArray());
}