C# MemoryReader.ReadInt32方法代码示例

 internal MethodIL/*?*/ GetMethodIL(
   uint methodDefRowId
 ) {
   MethodRow methodRow = this.MethodTable[methodDefRowId];
   if (
     (methodRow.ImplFlags & MethodImplFlags.CodeTypeMask) != MethodImplFlags.ILCodeType
     || methodRow.RVA == 0
   ) {
     return null;
   }
   MemoryBlock memBlock = this.RVAToMemoryBlock(methodRow.RVA);
   //  Error need to check if the Memory Block is empty. This is calse for all the calls...
   MemoryReader memReader = new MemoryReader(memBlock);
   byte headByte = memReader.ReadByte();
   if ((headByte & CILMethodFlags.ILFormatMask) == CILMethodFlags.ILTinyFormat) {
     int size = headByte >> CILMethodFlags.ILTinyFormatSizeShift;
     return new MethodIL(
       true,
       8,
       0x00000000,
       memReader.GetMemoryBlockAt(0, size),
       null
     );
   } else if ((headByte & CILMethodFlags.ILFormatMask) != CILMethodFlags.ILFatFormat) {
     //  PEFileFormat Error...
     return null;
   }
   //  FatILFormat
   byte headByte2 = memReader.ReadByte();
   if ((headByte2 >> CILMethodFlags.ILFatFormatHeaderSizeShift) != CILMethodFlags.ILFatFormatHeaderSize) {
     //  PEFile Format Error...
     return null;
   }
   bool localVarInited = (headByte & CILMethodFlags.ILInitLocals) == CILMethodFlags.ILInitLocals;
   bool moreSectsPresent = (headByte & CILMethodFlags.ILMoreSects) == CILMethodFlags.ILMoreSects;
   ushort maxStack = memReader.ReadUInt16();
   int codeSize = memReader.ReadInt32();
   uint localSignatureToken = memReader.ReadUInt32();
   MemoryBlock ilCodeMemBlock = memReader.GetMemoryBlockAt(0, codeSize);
   SEHTableEntry[]/*?*/ sehTableEntries = null;
   if (moreSectsPresent) {
     memReader.SkipBytes(codeSize);
     memReader.Align(4);
     byte sectHeader = memReader.ReadByte();
     if ((sectHeader & CILMethodFlags.SectEHTable) != CILMethodFlags.SectEHTable) {
       //  PEFile Format Error...
       return null;
     }
     bool sectFatFormat = (sectHeader & CILMethodFlags.SectFatFormat) == CILMethodFlags.SectFatFormat;
     int dataSize = memReader.ReadByte();
     if (sectFatFormat) {
       dataSize += (int)memReader.ReadUInt16() << 8;
       sehTableEntries = PEFileReader.GetFatSEHEntries(memReader, dataSize / 24);
     } else {
       memReader.SkipBytes(2); //skip over reserved field
       sehTableEntries = PEFileReader.GetSmallSEHEntries(memReader, dataSize / 12);
     }
   }
   return new MethodIL(
     localVarInited,
     maxStack,
     localSignatureToken,
     ilCodeMemBlock,
     sehTableEntries
   );
 }

 bool PopulateCilInstructions() {
   MethodBodyDocument document = new MethodBodyDocument(this.MethodDefinition);
   MemoryReader memReader = new MemoryReader(this.MethodIL.EncodedILMemoryBlock);
   var numInstructions = CountCilInstructions(memReader);
   if (numInstructions == 0) return true;
   CilInstruction[] instrList = new CilInstruction[numInstructions];
   int instructionNumber = 0;
   while (memReader.NotEndOfBytes) {
     object/*?*/ value = null;
     uint offset = (uint)memReader.Offset;
     OperationCode cilOpCode = memReader.ReadOpcode();
     switch (cilOpCode) {
       case OperationCode.Nop:
       case OperationCode.Break:
         break;
       case OperationCode.Ldarg_0:
       case OperationCode.Ldarg_1:
       case OperationCode.Ldarg_2:
       case OperationCode.Ldarg_3:
         value = this.GetParameter((uint)(cilOpCode - OperationCode.Ldarg_0));
         break;
       case OperationCode.Ldloc_0:
       case OperationCode.Ldloc_1:
       case OperationCode.Ldloc_2:
       case OperationCode.Ldloc_3:
         value = this.GetLocal((uint)(cilOpCode - OperationCode.Ldloc_0));
         break;
       case OperationCode.Stloc_0:
       case OperationCode.Stloc_1:
       case OperationCode.Stloc_2:
       case OperationCode.Stloc_3:
         value = this.GetLocal((uint)(cilOpCode - OperationCode.Stloc_0));
         break;
       case OperationCode.Ldarg_S:
       case OperationCode.Ldarga_S:
       case OperationCode.Starg_S:
         value = this.GetParameter(memReader.ReadByte());
         break;
       case OperationCode.Ldloc_S:
       case OperationCode.Ldloca_S:
       case OperationCode.Stloc_S:
         value = this.GetLocal(memReader.ReadByte());
         break;
       case OperationCode.Ldnull:
       case OperationCode.Ldc_I4_M1:
       case OperationCode.Ldc_I4_0:
       case OperationCode.Ldc_I4_1:
       case OperationCode.Ldc_I4_2:
       case OperationCode.Ldc_I4_3:
       case OperationCode.Ldc_I4_4:
       case OperationCode.Ldc_I4_5:
       case OperationCode.Ldc_I4_6:
       case OperationCode.Ldc_I4_7:
       case OperationCode.Ldc_I4_8:
         break;
       case OperationCode.Ldc_I4_S:
         value = (int)memReader.ReadSByte();
         break;
       case OperationCode.Ldc_I4:
         value = memReader.ReadInt32();
         break;
       case OperationCode.Ldc_I8:
         value = memReader.ReadInt64();
         break;
       case OperationCode.Ldc_R4:
         value = memReader.ReadSingle();
         break;
       case OperationCode.Ldc_R8:
         value = memReader.ReadDouble();
         break;
       case OperationCode.Dup:
       case OperationCode.Pop:
         break;
       case OperationCode.Jmp:
         value = this.GetMethod(memReader.ReadUInt32());
         break;
       case OperationCode.Call: {
           IMethodReference methodReference = this.GetMethod(memReader.ReadUInt32());
           IArrayTypeReference/*?*/ arrayType = methodReference.ContainingType as IArrayTypeReference;
           if (arrayType != null) {
             // For Get(), Set() and Address() on arrays, the runtime provides method implementations.
             // Hence, CCI2 replaces these with pseudo instrcutions Array_Set, Array_Get and Array_Addr.
             // All other methods on arrays will not use pseudo instruction and will have methodReference as their operand. 
             if (methodReference.Name.UniqueKey == this.PEFileToObjectModel.NameTable.Set.UniqueKey) {
               cilOpCode = OperationCode.Array_Set;
               value = arrayType;
             } else if (methodReference.Name.UniqueKey == this.PEFileToObjectModel.NameTable.Get.UniqueKey) {
               cilOpCode = OperationCode.Array_Get;
               value = arrayType;
             } else if (methodReference.Name.UniqueKey == this.PEFileToObjectModel.NameTable.Address.UniqueKey) {
               cilOpCode = OperationCode.Array_Addr;
               value = arrayType;
             } else {
               value = methodReference;
             }
           } else {
             value = methodReference;
           }
         }
         break;
//.........这里部分代码省略.........

 bool ReadMetadataHeader(
   ref MemoryReader memReader
 )
   //^ requires this.ReaderState >= ReaderState.PEFile;
 {
   if (memReader.RemainingBytes < COR20Constants.MinimumSizeofMetadataHeader) {
     this.ErrorContainer.AddDirectoryError(Directories.Cor20HeaderMetaData, 0, MetadataReaderErrorKind.MetadataHeaderTooSmall);
     return false;
   }
   this.MetadataHeader.Signature = memReader.ReadUInt32();
   if (this.MetadataHeader.Signature != COR20Constants.COR20MetadataSignature) {
     this.ErrorContainer.AddDirectoryError(Directories.Cor20HeaderMetaData, memReader.Offset - sizeof(uint), MetadataReaderErrorKind.MetadataSignature);
     return false;
   }
   this.MetadataHeader.MajorVersion = memReader.ReadUInt16();
   this.MetadataHeader.MinorVersion = memReader.ReadUInt16();
   this.MetadataHeader.ExtraData = memReader.ReadUInt32();
   this.MetadataHeader.VersionStringSize = memReader.ReadInt32();
   if (memReader.RemainingBytes < this.MetadataHeader.VersionStringSize) {
     this.ErrorContainer.AddDirectoryError(Directories.Cor20HeaderMetaData, memReader.Offset, MetadataReaderErrorKind.NotEnoughSpaceForVersionString);
     return false;
   }
   int numberOfBytesRead;
   this.MetadataHeader.VersionString = memReader.PeekUTF8NullTerminated(0, out numberOfBytesRead);
   memReader.SkipBytes(this.MetadataHeader.VersionStringSize);
   return true;
 }

 bool ReadStreamHeaders(
   ref MemoryReader memReader
 )
   //^ requires this.ReaderState >= ReaderState.PEFile;
 {
   int numberOfStreams = this.StorageHeader.NumberOfStreams;
   this.StreamHeaders = new StreamHeader[numberOfStreams];
   StreamHeader[] streamHeaders = this.StreamHeaders;
   for (int i = 0; i < numberOfStreams; ++i) {
     if (memReader.RemainingBytes < COR20Constants.MinimumSizeofStreamHeader) {
       this.ErrorContainer.AddDirectoryError(Directories.Cor20HeaderMetaData, memReader.Offset, MetadataReaderErrorKind.StreamHeaderTooSmall);
       return false;
     }
     streamHeaders[i].Offset = memReader.ReadUInt32();
     streamHeaders[i].Size = memReader.ReadInt32();
     //  Review: Oh well there is no way i can test if we will read correctly. However we can check it after reading and aligning...
     streamHeaders[i].Name = memReader.ReadASCIINullTerminated();
     memReader.Align(4);
     if (memReader.RemainingBytes < 0) {
       this.ErrorContainer.AddDirectoryError(Directories.Cor20HeaderMetaData, memReader.Offset, MetadataReaderErrorKind.NotEnoughSpaceForStreamHeaderName);
       return false;
     }
   }
   return true;
 }

 bool ReadSectionHeaders(
   ref MemoryReader memReader
 )
   //^ requires this.ReaderState >= ReaderState.Initialized;
 {
   int numberOfSections = this.COFFFileHeader.NumberOfSections;
   if (memReader.RemainingBytes < numberOfSections * PEFileConstants.SizeofSectionHeader) {
     this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.SectionHeadersTooSmall);
     return false;
   }
   this.SectionHeaders = new SectionHeader[numberOfSections];
   SectionHeader[] sectionHeaderArray = this.SectionHeaders;
   for (int i = 0; i < numberOfSections; ++i) {
     sectionHeaderArray[i].Name = memReader.ReadASCIIWithSize(PEFileConstants.SizeofSectionName);
     sectionHeaderArray[i].VirtualSize = memReader.ReadInt32();
     sectionHeaderArray[i].VirtualAddress = memReader.ReadInt32();
     sectionHeaderArray[i].SizeOfRawData = memReader.ReadInt32();
     sectionHeaderArray[i].OffsetToRawData = memReader.ReadInt32();
     sectionHeaderArray[i].RVAToRelocations = memReader.ReadInt32();
     sectionHeaderArray[i].PointerToLineNumbers = memReader.ReadInt32();
     sectionHeaderArray[i].NumberOfRelocations = memReader.ReadUInt16();
     sectionHeaderArray[i].NumberOfLineNumbers = memReader.ReadUInt16();
     sectionHeaderArray[i].SectionCharacteristics = (SectionCharacteristics)memReader.ReadUInt32();
   }
   return true;
 }

 bool ReadCOR20Header()
   //^ requires this.ReaderState >= ReaderState.PEFile;
 {
   MemoryBlock memBlock = this.DirectoryToMemoryBlock(this.OptionalHeaderDirectoryEntries.COR20HeaderTableDirectory);
   if (memBlock.Length < this.OptionalHeaderDirectoryEntries.COR20HeaderTableDirectory.Size) {
     this.ErrorContainer.AddDirectoryError(Directories.COR20Header, 0, MetadataReaderErrorKind.NotEnoughSpaceForCOR20HeaderTableDirectory);
     return false;
   }
   MemoryReader memReader = new MemoryReader(memBlock);
   if (memReader.RemainingBytes < COR20Constants.SizeOfCOR20Header) {
     this.ErrorContainer.AddDirectoryError(Directories.COR20Header, 0, MetadataReaderErrorKind.COR20HeaderTooSmall);
     return false;
   }
   this.COR20Header.CountBytes = memReader.ReadInt32();
   this.COR20Header.MajorRuntimeVersion = memReader.ReadUInt16();
   this.COR20Header.MinorRuntimeVersion = memReader.ReadUInt16();
   this.COR20Header.MetaDataDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.COR20Header.MetaDataDirectory.Size = memReader.ReadUInt32();
   this.COR20Header.COR20Flags = (COR20Flags)memReader.ReadUInt32();
   this.COR20Header.EntryPointTokenOrRVA = memReader.ReadUInt32();
   this.COR20Header.ResourcesDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.COR20Header.ResourcesDirectory.Size = memReader.ReadUInt32();
   this.COR20Header.StrongNameSignatureDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.COR20Header.StrongNameSignatureDirectory.Size = memReader.ReadUInt32();
   this.COR20Header.CodeManagerTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.COR20Header.CodeManagerTableDirectory.Size = memReader.ReadUInt32();
   this.COR20Header.VtableFixupsDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.COR20Header.ExportAddressTableJumpsDirectory.Size = memReader.ReadUInt32();
   this.COR20Header.ExportAddressTableJumpsDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.COR20Header.ExportAddressTableJumpsDirectory.Size = memReader.ReadUInt32();
   this.COR20Header.ManagedNativeHeaderDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.COR20Header.ManagedNativeHeaderDirectory.Size = memReader.ReadUInt32();
   return true;
 }

 bool ReadOptionalHeaderDirectoryEntries(
   ref MemoryReader memReader
 )
   //^ requires this.ReaderState >= ReaderState.Initialized;
 {
   if (memReader.RemainingBytes < PEFileConstants.SizeofOptionalHeaderDirectoriesEntries) {
     this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.OptionalHeaderDirectoryEntriesTooSmall);
     return false;
   }
   this.OptionalHeaderDirectoryEntries.ExportTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.ExportTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.ImportTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.ImportTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.ResourceTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.ResourceTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.ExceptionTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.ExceptionTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.CertificateTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.CertificateTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.BaseRelocationTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.BaseRelocationTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.DebugTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.DebugTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.CopyrightTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.CopyrightTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.GlobalPointerTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.GlobalPointerTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.ThreadLocalStorageTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.ThreadLocalStorageTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.LoadConfigTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.LoadConfigTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.BoundImportTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.BoundImportTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.ImportAddressTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.ImportAddressTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.DelayImportTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.DelayImportTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.COR20HeaderTableDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.COR20HeaderTableDirectory.Size = memReader.ReadUInt32();
   this.OptionalHeaderDirectoryEntries.ReservedDirectory.RelativeVirtualAddress = memReader.ReadInt32();
   this.OptionalHeaderDirectoryEntries.ReservedDirectory.Size = memReader.ReadUInt32();
   return true;
 }

 bool ReadOptionalHeaderNTAdditionalFields64(
   ref MemoryReader memReader
 )
   //^ requires this.ReaderState >= ReaderState.Initialized;
 {
   if (memReader.RemainingBytes < PEFileConstants.SizeofOptionalHeaderNTAdditionalFields64) {
     this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.OptionalHeaderNTAdditionalFields64TooSmall);
     return false;
   }
   this.OptionalHeaderNTAdditionalFields.ImageBase = memReader.ReadUInt64();
   this.OptionalHeaderNTAdditionalFields.SectionAlignment = memReader.ReadInt32();
   this.OptionalHeaderNTAdditionalFields.FileAlignment = memReader.ReadUInt32();
   this.OptionalHeaderNTAdditionalFields.MajorOperatingSystemVersion = memReader.ReadUInt16();
   this.OptionalHeaderNTAdditionalFields.MinorOperatingSystemVersion = memReader.ReadUInt16();
   this.OptionalHeaderNTAdditionalFields.MajorImageVersion = memReader.ReadUInt16();
   this.OptionalHeaderNTAdditionalFields.MinorImageVersion = memReader.ReadUInt16();
   this.OptionalHeaderNTAdditionalFields.MajorSubsystemVersion = memReader.ReadUInt16();
   this.OptionalHeaderNTAdditionalFields.MinorSubsystemVersion = memReader.ReadUInt16();
   this.OptionalHeaderNTAdditionalFields.Win32VersionValue = memReader.ReadUInt32();
   this.OptionalHeaderNTAdditionalFields.SizeOfImage = memReader.ReadInt32();
   this.OptionalHeaderNTAdditionalFields.SizeOfHeaders = memReader.ReadInt32();
   this.OptionalHeaderNTAdditionalFields.CheckSum = memReader.ReadUInt32();
   this.OptionalHeaderNTAdditionalFields.Subsystem = (Subsystem)memReader.ReadUInt16();
   this.OptionalHeaderNTAdditionalFields.DllCharacteristics = (DllCharacteristics)memReader.ReadUInt16();
   this.OptionalHeaderNTAdditionalFields.SizeOfStackReserve = memReader.ReadUInt64();
   this.OptionalHeaderNTAdditionalFields.SizeOfStackCommit = memReader.ReadUInt64();
   this.OptionalHeaderNTAdditionalFields.SizeOfHeapReserve = memReader.ReadUInt64();
   this.OptionalHeaderNTAdditionalFields.SizeOfHeapCommit = memReader.ReadUInt64();
   this.OptionalHeaderNTAdditionalFields.LoaderFlags = memReader.ReadUInt32();
   this.OptionalHeaderNTAdditionalFields.NumberOfRvaAndSizes = memReader.ReadInt32();
   return true;
 }

 bool ReadOptionalHeaderStandardFields64(
   ref MemoryReader memReader
 )
   //^ requires this.ReaderState >= ReaderState.Initialized;
 {
   if (memReader.RemainingBytes < PEFileConstants.SizeofOptionalHeaderStandardFields64) {
     this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.OptionalHeaderStandardFields64TooSmall);
     return false;
   }
   this.OptionalHeaderStandardFields.PEMagic = (PEMagic)memReader.ReadUInt16();
   this.OptionalHeaderStandardFields.MajorLinkerVersion = memReader.ReadByte();
   this.OptionalHeaderStandardFields.MinorLinkerVersion = memReader.ReadByte();
   this.OptionalHeaderStandardFields.SizeOfCode = memReader.ReadInt32();
   this.OptionalHeaderStandardFields.SizeOfInitializedData = memReader.ReadInt32();
   this.OptionalHeaderStandardFields.SizeOfUninitializedData = memReader.ReadInt32();
   this.OptionalHeaderStandardFields.RVAOfEntryPoint = memReader.ReadInt32();
   this.OptionalHeaderStandardFields.BaseOfCode = memReader.ReadInt32();
   return true;
 }

 bool ReadCOFFFileHeader(
   ref MemoryReader memReader
 )
   //^ requires this.ReaderState >= ReaderState.Initialized;
 {
   if (memReader.RemainingBytes < PEFileConstants.SizeofCOFFFileHeader) {
     this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.COFFHeaderTooSmall);
     return false;
   }
   this.COFFFileHeader.Machine = (Machine)memReader.ReadUInt16();
   this.COFFFileHeader.NumberOfSections = memReader.ReadInt16();
   this.COFFFileHeader.TimeDateStamp = memReader.ReadInt32();
   this.COFFFileHeader.PointerToSymbolTable = memReader.ReadInt32();
   this.COFFFileHeader.NumberOfSymbols = memReader.ReadInt32();
   this.COFFFileHeader.SizeOfOptionalHeader = memReader.ReadInt16();
   this.COFFFileHeader.Characteristics = (Characteristics)memReader.ReadUInt16();
   return true;
 }

 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;
 }