internal IMetadataConstant GetDefaultValue(
MetadataObject metadataObject
) {
uint constRowId = this.PEFileReader.ConstantTable.GetConstantRowId(metadataObject.TokenValue);
if (constRowId == 0)
return Dummy.Constant;
ConstantRow constRow = this.PEFileReader.ConstantTable[constRowId];
MemoryBlock constValueMemoryBlock = this.PEFileReader.BlobStream.GetMemoryBlockAt(constRow.Value);
MemoryReader memoryReader = new MemoryReader(constValueMemoryBlock);
switch (constRow.Type) {
case ElementType.Boolean: {
byte val = memoryReader.ReadByte();
return new ConstantExpression(this.PlatformType.SystemBoolean, val != 0);
}
case ElementType.Char:
return new ConstantExpression(this.PlatformType.SystemChar, memoryReader.ReadChar());
case ElementType.Int8:
return new ConstantExpression(this.PlatformType.SystemInt8, memoryReader.ReadSByte());
case ElementType.Int16:
return new ConstantExpression(this.PlatformType.SystemInt16, memoryReader.ReadInt16());
case ElementType.Int32:
return new ConstantExpression(this.PlatformType.SystemInt32, memoryReader.ReadInt32());
case ElementType.Int64:
return new ConstantExpression(this.PlatformType.SystemInt64, memoryReader.ReadInt64());
case ElementType.UInt8:
return new ConstantExpression(this.PlatformType.SystemUInt8, memoryReader.ReadByte());
case ElementType.UInt16:
return new ConstantExpression(this.PlatformType.SystemUInt16, memoryReader.ReadUInt16());
case ElementType.UInt32:
return new ConstantExpression(this.PlatformType.SystemUInt32, memoryReader.ReadUInt32());
case ElementType.UInt64:
return new ConstantExpression(this.PlatformType.SystemUInt64, memoryReader.ReadUInt64());
case ElementType.Single:
return new ConstantExpression(this.PlatformType.SystemFloat32, memoryReader.ReadSingle());
case ElementType.Double:
return new ConstantExpression(this.PlatformType.SystemFloat64, memoryReader.ReadDouble());
case ElementType.String: {
int byteLen = memoryReader.Length;
string/*?*/ value;
if (byteLen == -1) {
value = null;
} else if (byteLen == 0) {
value = string.Empty;
} else {
value = memoryReader.ReadUTF16WithSize(byteLen);
}
return new ConstantExpression(this.PlatformType.SystemString, value);
}
case ElementType.Class:
return new ConstantExpression(this.PlatformType.SystemObject, null);
}
// MDError...
return Dummy.Constant;
}
