public static int ReadCompressedInteger(this IBinaryAccessor accessor)
{
int result = 0;
byte b = accessor.ReadByte();
if ((b & 0x80) == 0)
{
// 1 byte
result = b;
}
else if ((b & 0x40) == 0)
{
// 2 byte
result = (b & ~0x80) << 8;
result |= accessor.ReadByte();
}
else
{
// 4 byte
result = (b & ~0xc0) << 24;
result |= accessor.ReadByte() << 16;
result |= accessor.ReadByte() << 8;
result |= accessor.ReadByte();
}
return(result);
}
internal void Read(IBinaryAccessor accessor)
{
// Reserved, 4 bytes
accessor.ReadInt32();
_schemaMajorVersion = accessor.ReadByte();
_schemaMinorVersion = accessor.ReadByte();
byte heapFlags = accessor.ReadByte();
// Reserved, 1 bytes
accessor.ReadByte();
ulong validMask = accessor.ReadUInt64();
_sortMask = accessor.ReadUInt64();
// Row counts
int[] rowCounts = new int[MetadataConstants.TableCount];
for (int tableType = 0; tableType < MetadataConstants.TableCount; tableType++)
{
if ((validMask & (1UL << tableType)) != 0)
{
rowCounts[tableType] = accessor.ReadInt32();
}
}
var compressionInfo = TableCompressionInfo.Create(_metadata, rowCounts, heapFlags);
// Tables
for (int tableType = 0; tableType < MetadataConstants.TableCount; tableType++)
{
_tables[tableType].Read(accessor, compressionInfo, rowCounts[tableType]);
}
}
private static CustomAttributeTypedArgument LoadObject(IBinaryAccessor accessor, Module module)
{
bool isArray = false;
int elementType = (int)accessor.ReadByte();
if (elementType == ElementType.SzArray)
{
isArray = true;
elementType = (int)accessor.ReadByte();
}
switch (elementType)
{
case ElementType.Enum:
{
string enumTypeName = CustomAttributeHelper.ReadBlobString(accessor);
int length = isArray ? CustomAttributeHelper.ReadArrayLength(accessor) : 1;
return(LoadEnum(accessor, module, enumTypeName, isArray, length));
}
default:
{
int length = isArray ? CustomAttributeHelper.ReadArrayLength(accessor) : 1;
return(Load(accessor, module, elementType, isArray, length));
}
}
}
private ExceptionHandler LoadTinyExceptionHandler(IBinaryAccessor accessor, Module module)
{
var handler = new ExceptionHandler();
int flags = accessor.ReadInt16() & ILExceptionFlag.MASK;
switch (flags)
{
case 0:
handler.Type = ExceptionHandlerType.Catch;
break;
case 1:
handler.Type = ExceptionHandlerType.Filter;
break;
case 2:
handler.Type = ExceptionHandlerType.Finally;
break;
case 4:
handler.Type = ExceptionHandlerType.Fault;
break;
}
handler.TryOffset = accessor.ReadUInt16();
handler.TryLength = accessor.ReadByte();
handler.HandlerOffset = accessor.ReadUInt16();
handler.HandlerLength = accessor.ReadByte();
switch (handler.Type)
{
case ExceptionHandlerType.Catch:
{
int token = accessor.ReadInt32();
handler.CatchType = TypeSignature.Load(module, token);
}
break;
case ExceptionHandlerType.Filter:
{
handler.FilterOffset = accessor.ReadInt32();
}
break;
default:
{
accessor.Position += 4; // padded
}
break;
}
return(handler);
}
internal static CustomAttributeNamedArgument Load(IBinaryAccessor accessor, Module module)
{
var argument = new CustomAttributeNamedArgument();
int argumentType = accessor.ReadByte();
switch (argumentType)
{
case Metadata.ElementType.Field:
argument._type = CustomAttributeNamedArgumentType.Field;
break;
case Metadata.ElementType.Property:
argument._type = CustomAttributeNamedArgumentType.Property;
break;
default:
throw new InvalidDataException();
}
bool isArray = false;
int elementType = accessor.ReadByte();
if (elementType == ElementType.SzArray)
{
elementType = accessor.ReadByte();
isArray = true;
}
switch (elementType)
{
case ElementType.Enum:
{
string enumTypeName = CustomAttributeHelper.ReadBlobString(accessor);
enumTypeName = enumTypeName.TrimEnd(new char[] { '\0' });
argument._name = CustomAttributeHelper.ReadBlobString(accessor);
int arrayLength = isArray ? CustomAttributeHelper.ReadArrayLength(accessor) : 1;
argument._value = CustomAttributeTypedArgument.LoadEnum(accessor, module, enumTypeName, isArray, arrayLength);
}
break;
default:
{
argument._name = CustomAttributeHelper.ReadBlobString(accessor);
int arrayLength = isArray ? CustomAttributeHelper.ReadArrayLength(accessor) : 1;
argument._value = CustomAttributeTypedArgument.Load(accessor, module, elementType, isArray, arrayLength);
}
break;
}
return(argument);
}
private void LoadExceptionHandlerSection(IBinaryAccessor accessor, Module module, int flags)
{
if (_exceptionHandlers == null)
{
_exceptionHandlers = new List <ExceptionHandler>();
}
if ((flags & 0x40) == 0x40)
{
// Fat format
accessor.Position--;
int length = (accessor.ReadInt32() >> 8) / 24;
for (int i = 0; i < length; i++)
{
var handler = LoadFatExceptionHandler(accessor, module);
_exceptionHandlers.Add(handler);
}
}
else
{
// Tiny format
int length = accessor.ReadByte() / 12;
accessor.Position += 2; // padded
for (int i = 0; i < length; i++)
{
var handler = LoadTinyExceptionHandler(accessor, module);
_exceptionHandlers.Add(handler);
}
}
}
private static MarshalType Load(IBinaryAccessor accessor, CodeNode parent)
{
var unmanagedType = (UnmanagedType)accessor.ReadByte();
var marshalType = CreateNew(parent, unmanagedType);
marshalType.Load(accessor);
return(marshalType);
}
private static CustomAttributeTypedArgument LoadBool(IBinaryAccessor accessor, Module module, bool isArray, int arrayLength)
{
var type = TypeReference.GetPrimitiveType(PrimitiveTypeCode.Boolean, module.Assembly);
if (isArray)
{
var value = new bool[arrayLength];
for (int i = 0; i < arrayLength; i++)
{
value[i] = accessor.ReadByte() != 0;
}
return(new CustomAttributeTypedArgument(value, type));
}
else
{
bool value = accessor.ReadByte() != 0;
return(new CustomAttributeTypedArgument(value, type));
}
}
protected internal override void Read(IBinaryAccessor accessor, TableCompressionInfo compressionInfo, int count)
{
if (count == 0)
{
return;
}
var rows = new ConstantRow[count];
for (int i = 0; i < count; i++)
{
var row = new ConstantRow();
row.Type = (ConstantTableType)accessor.ReadByte();
accessor.ReadByte(); // Padding
row.Parent = accessor.ReadCell(compressionInfo.CodedTokenDataSize4[1]);
row.Value = accessor.ReadCell(compressionInfo.BlobHeapOffsetSize4);
rows[i] = row;
}
_count = count;
_rows = rows;
}
internal static string ReadBlobString(IBinaryAccessor accessor)
{
int len = 0;
byte b = accessor.ReadByte();
if (b == 0)
{
return(string.Empty);
}
if (b == 0xff)
{
return(null);
}
if ((b & 0x80) == 0)
{
// 1 byte
len = b;
}
else if ((b & 0x40) == 0)
{
// 2 byte
len = (b & ~0x80) << 8;
len |= accessor.ReadByte();
}
else
{
// 4 byte
len = (b & ~0xc0) << 24;
len |= accessor.ReadByte() << 16;
len |= accessor.ReadByte() << 8;
len |= accessor.ReadByte();
}
return(accessor.ReadString(len, Encoding.UTF8));
}
private void Load(IBinaryAccessor accessor, Module module)
{
int flags = accessor.ReadByte();
if ((flags & ILMethodFlags.FormatMask) == ILMethodFlags.FatFormat)
{
// Fat format
accessor.ReadByte();
_maxStackSize = accessor.ReadUInt16();
int codeSize = accessor.ReadInt32();
_initLocals = ((flags & ILMethodFlags.InitLocals) == ILMethodFlags.InitLocals);
_localVarToken = accessor.ReadInt32();
if (MetadataToken.GetType(_localVarToken) == MetadataTokenType.Signature)
{
LoadLocalVariables(module, MetadataToken.GetRID(_localVarToken));
}
LoadInstructions(accessor, module, codeSize);
if ((flags & ILMethodFlags.MoreSects) == ILMethodFlags.MoreSects)
{
// More sections
LoadSection(accessor, module);
}
}
else
{
// Tiny format
// Used when the method is tiny (< 64 bytes), and there are no local vars
_maxStackSize = 8;
int codeSize = flags >> 2;
LoadInstructions(accessor, module, codeSize);
}
}
/// <summary>
/// Reads a Boolean value.
/// </summary>
/// <returns>true if the byte is nonzero; otherwise, false.</returns>
public static bool?ReadNullableBoolean(this IBinaryAccessor accessor)
{
byte b = accessor.ReadByte();
if (b == 0)
{
return(false);
}
else if (b == 1)
{
return(true);
}
else
{
return(null);
}
}
protected void LoadSignature(IBinaryAccessor accessor, ModuleImage image)
{
byte sigType = accessor.ReadByte();
if ((sigType & Metadata.SignatureType.Property) != Metadata.SignatureType.Property)
{
throw new CodeModelException(string.Format(SR.AssemblyLoadError, _module.Location));
}
_hasThis = ((sigType & Metadata.SignatureType.HasThis) == Metadata.SignatureType.HasThis);
int paramCount = accessor.ReadCompressedInteger();
_returnType = TypeSignature.Load(accessor, _module);
_parameters = new PropertyParameterCollection(this);
_parameters.Load(accessor, paramCount);
}
private void LoadSection(IBinaryAccessor accessor, Module module)
{
accessor.Align(4);
int flags = accessor.ReadByte();
if ((flags & ILMethodSect.EHTable) == ILMethodSect.EHTable)
{
// EHTable
LoadExceptionHandlerSection(accessor, module, flags);
}
if ((flags & ILMethodSect.MoreSects) == ILMethodSect.MoreSects)
{
// More sections
LoadSection(accessor, module);
}
}
protected void LoadSignature(IBinaryAccessor accessor, ModuleImage image)
{
_sigType = accessor.ReadByte();
if ((_sigType & Metadata.SignatureType.Generic) == Metadata.SignatureType.Generic)
{
accessor.ReadCompressedInteger(); // GenericParameterCount (unused)
}
int paramCount = accessor.ReadCompressedInteger();
int[] rids;
image.GetParamsByMethod(_rid, out rids);
int ridIndex = 0;
_returnType = new MethodReturnType(this);
_returnType.Load(accessor, rids, ref ridIndex);
if (paramCount > 0)
{
_parameters = new MethodParameterCollection(this);
_parameters.Load(accessor, paramCount, rids, ridIndex);
}
}
protected internal override void Load(IBinaryAccessor accessor)
{
_arraySubType = (UnmanagedType)accessor.ReadByte();
// The value MAX is used to indicate "no info."
if (_arraySubType == UnmanagedType.Max)
{
return;
}
if (accessor.IsEof())
{
return;
}
if (_arraySubType == UnmanagedType.IUnknown ||
_arraySubType == UnmanagedType.IDispatch ||
_arraySubType == UnmanagedType.Interface)
{
_iidParameterIndex = accessor.ReadCompressedInteger();
}
if (accessor.IsEof())
{
return;
}
_lengthParamIndex = accessor.ReadCompressedInteger();
if (accessor.IsEof())
{
return;
}
_arrayLength = accessor.ReadCompressedInteger();
}
internal void Read(IBinaryAccessor accessor, ProjectReadState state)
{
_duplicateBehavior = (MergeDuplicateBehavior)accessor.ReadByte();
}
private void StateLoadInstructions(IBinaryAccessor accessor, Module module)
{
int instructionCount = accessor.Read7BitEncodedInt();
_instructions = new List <Instruction>(instructionCount);
for (int i = 0; i < instructionCount; i++)
{
OpCode opCode;
byte opByte = accessor.ReadByte();
if (opByte == 0xFE)
{
opByte = accessor.ReadByte();
opCode = OpCodes.OpCodeArray[256 + opByte];
}
else
{
opCode = OpCodes.OpCodeArray[opByte];
}
object value;
switch (opCode.OperandType)
{
case OperandType.InlineBrTarget:
{
value = accessor.ReadInt32();
}
break;
case OperandType.InlineField:
{
int token = accessor.ReadInt32();
value = module.GetSignature <Signature>(token);
}
break;
case OperandType.InlineI:
{
value = accessor.ReadInt32();
}
break;
case OperandType.InlineI8:
{
value = accessor.ReadInt64();
}
break;
case OperandType.InlineMethod:
{
int token = accessor.ReadInt32();
value = module.GetSignature <Signature>(token);
}
break;
case OperandType.InlineR:
{
value = accessor.ReadDouble();
}
break;
case OperandType.InlineSig:
{
int token = accessor.ReadInt32();
value = module.GetSignature <Signature>(token);
}
break;
case OperandType.InlineString:
{
// Token of a userdefined string, whose RID portion is actually an offset in the #US blob stream.
value = accessor.ReadLengthPrefixedString(Encoding.Unicode);
}
break;
case OperandType.InlineSwitch:
{
int count = accessor.ReadInt32();
int[] targets = new int[count];
for (int j = 0; j < count; j++)
{
targets[j] = accessor.ReadInt32();
}
value = targets;
}
break;
case OperandType.InlineTok:
{
int token = accessor.ReadInt32();
value = module.GetSignature <Signature>(token);
}
break;
case OperandType.InlineType:
{
int token = accessor.ReadInt32();
value = module.GetSignature <Signature>(token);
}
break;
case OperandType.InlineVar:
{
value = accessor.ReadInt16();
}
break;
case OperandType.ShortInlineBrTarget:
{
value = accessor.ReadSByte();
}
break;
case OperandType.ShortInlineI:
{
value = accessor.ReadByte();
}
break;
case OperandType.ShortInlineR:
{
value = accessor.ReadSingle();
}
break;
case OperandType.ShortInlineVar:
{
value = accessor.ReadByte();
}
break;
default:
{
value = null;
}
break;
}
_instructions.Add(new Instruction(opCode, value));
}
}
private void LoadInstructions(IBinaryAccessor accessor, Module module, int codeSize)
{
long startOffset = accessor.Position;
var image = module.Image;
_instructions = new List <Instruction>();
while (accessor.Position < startOffset + codeSize)
{
OpCode opCode;
byte opByte = accessor.ReadByte();
if (opByte == 0xFE)
{
opByte = accessor.ReadByte();
opCode = OpCodes.OpCodeArray[256 + opByte];
}
else
{
opCode = OpCodes.OpCodeArray[opByte];
}
if (opCode == null)
{
throw new CodeModelException(string.Format(SR.AssemblyLoadError, module.Location));
}
object value;
switch (opCode.OperandType)
{
case OperandType.InlineBrTarget:
{
value = accessor.ReadInt32();
}
break;
case OperandType.InlineField:
{
int token = accessor.ReadInt32();
value = FieldReference.Load(module, token);
}
break;
case OperandType.InlineI:
{
value = accessor.ReadInt32();
}
break;
case OperandType.InlineI8:
{
value = accessor.ReadInt64();
}
break;
case OperandType.InlineMethod:
{
int token = accessor.ReadInt32();
value = MethodReference.Load(module, token);
}
break;
case OperandType.InlineR:
{
value = accessor.ReadDouble();
}
break;
case OperandType.InlineSig:
{
int token = accessor.ReadInt32();
if (MetadataToken.GetType(token) == MetadataTokenType.Signature)
{
int rid = MetadataToken.GetRID(token);
value = CallSite.LoadStandAloneSig(module, rid);
}
else
{
throw new CodeModelException(SR.MethodBodyBlobNotValid);
}
}
break;
case OperandType.InlineString:
{
// Token of a userdefined string, whose RID portion is actually an offset in the #US blob stream.
uint token = accessor.ReadUInt32();
int rid = (int)(token & 0x00ffffff);
value = image.GetUserString(rid);
}
break;
case OperandType.InlineSwitch:
{
int count = accessor.ReadInt32();
int[] targets = new int[count];
for (int i = 0; i < count; i++)
{
targets[i] = accessor.ReadInt32();
}
value = targets;
}
break;
case OperandType.InlineTok:
{
int token = accessor.ReadInt32();
int rid = MetadataToken.GetRID(token);
switch (MetadataToken.GetType(token))
{
case MetadataTokenType.Method:
value = MethodReference.LoadMethodDef(module, rid);
break;
case MetadataTokenType.MethodSpec:
value = GenericMethodReference.LoadMethodSpec(module, rid);
break;
case MetadataTokenType.MemberRef:
value = MethodReference.LoadMemberRef(module, rid);
break;
case MetadataTokenType.Field:
value = FieldReference.LoadFieldDef(module, rid);
break;
case MetadataTokenType.TypeDef:
value = TypeReference.LoadTypeDef(module, rid);
break;
case MetadataTokenType.TypeRef:
value = TypeReference.LoadTypeRef(module, rid);
break;
case MetadataTokenType.TypeSpec:
value = TypeSignature.LoadTypeSpec(module, rid);
break;
default:
throw new CodeModelException(SR.MethodBodyBlobNotValid);
}
}
break;
case OperandType.InlineType:
{
int token = accessor.ReadInt32();
value = TypeSignature.Load(module, token);
}
break;
case OperandType.InlineVar:
{
value = accessor.ReadInt16();
}
break;
case OperandType.ShortInlineBrTarget:
{
value = accessor.ReadSByte();
}
break;
case OperandType.ShortInlineI:
{
value = accessor.ReadByte();
}
break;
case OperandType.ShortInlineR:
{
value = accessor.ReadSingle();
}
break;
case OperandType.ShortInlineVar:
{
value = accessor.ReadByte();
}
break;
default:
{
value = null;
}
break;
}
_instructions.Add(new Instruction(opCode, value));
}
}
internal static CallSite LoadCallSite(IBinaryAccessor accessor, Module module)
{
byte sigType = accessor.ReadByte();
return(LoadCallSite(accessor, module, sigType));
}
