C# MemoryReader.SeekOffset方法代码示例

//.........这里部分代码省略.........
     OperationCode cilOpCode = memReader.ReadOpcode();
     switch (cilOpCode) {
       case OperationCode.Ldarg_S:
       case OperationCode.Ldarga_S:
       case OperationCode.Starg_S:
       case OperationCode.Ldloc_S:
       case OperationCode.Ldloca_S:
       case OperationCode.Stloc_S:
       case OperationCode.Ldc_I4_S:
       case OperationCode.Br_S:
       case OperationCode.Brfalse_S:
       case OperationCode.Brtrue_S:
       case OperationCode.Beq_S:
       case OperationCode.Bge_S:
       case OperationCode.Bgt_S:
       case OperationCode.Ble_S:
       case OperationCode.Blt_S:
       case OperationCode.Bne_Un_S:
       case OperationCode.Bge_Un_S:
       case OperationCode.Bgt_Un_S:
       case OperationCode.Ble_Un_S:
       case OperationCode.Blt_Un_S:
       case OperationCode.Leave_S:
       case OperationCode.Unaligned_:
       case OperationCode.No_:
         memReader.SkipBytes(1);
         break;
       case OperationCode.Ldarg:
       case OperationCode.Ldarga:
       case OperationCode.Starg:
       case OperationCode.Ldloc:
       case OperationCode.Ldloca:
       case OperationCode.Stloc:
         memReader.SkipBytes(2);
         break;
       case OperationCode.Ldc_I4:
       case OperationCode.Jmp:
       case OperationCode.Call:
       case OperationCode.Calli:
       case OperationCode.Br:
       case OperationCode.Brfalse:
       case OperationCode.Brtrue:
       case OperationCode.Beq:
       case OperationCode.Bge:
       case OperationCode.Bgt:
       case OperationCode.Ble:
       case OperationCode.Blt:
       case OperationCode.Bne_Un:
       case OperationCode.Bge_Un:
       case OperationCode.Bgt_Un:
       case OperationCode.Ble_Un:
       case OperationCode.Blt_Un:
       case OperationCode.Callvirt:
       case OperationCode.Cpobj:
       case OperationCode.Ldobj:
       case OperationCode.Ldstr:
       case OperationCode.Newobj:
       case OperationCode.Castclass:
       case OperationCode.Isinst:
       case OperationCode.Unbox:
       case OperationCode.Ldfld:
       case OperationCode.Ldflda:
       case OperationCode.Stfld:
       case OperationCode.Ldsfld:
       case OperationCode.Ldsflda:
       case OperationCode.Stsfld:
       case OperationCode.Stobj:
       case OperationCode.Box:
       case OperationCode.Newarr:
       case OperationCode.Ldelema:
       case OperationCode.Ldelem:
       case OperationCode.Stelem:
       case OperationCode.Unbox_Any:
       case OperationCode.Refanyval:
       case OperationCode.Mkrefany:
       case OperationCode.Ldtoken:
       case OperationCode.Leave:
       case OperationCode.Ldftn:
       case OperationCode.Ldvirtftn:
       case OperationCode.Initobj:
       case OperationCode.Constrained_:
       case OperationCode.Sizeof:
       case OperationCode.Ldc_R4:
         memReader.SkipBytes(4);
         break;
       case OperationCode.Ldc_I8:
       case OperationCode.Ldc_R8:
         memReader.SkipBytes(8);
         break;
       case OperationCode.Switch:
         int numTargets = (int)memReader.ReadUInt32();
         memReader.SkipBytes(4*numTargets);
         break;
       default:
         break;
     }
   }
   memReader.SeekOffset(0);
   return count;
 }

 bool ReadPEFileLevelData()
   //^ requires this.ReaderState >= ReaderState.Initialized;
 {
   MemoryReader memReader = new MemoryReader(this.BinaryDocumentMemoryBlock.Pointer, this.BinaryDocumentMemoryBlock.Length);
   if (memReader.RemainingBytes < PEFileConstants.BasicPEHeaderSize) {
     this.ErrorContainer.AddBinaryError(0, MetadataReaderErrorKind.FileSizeTooSmall);
     return false;
   }
   //  Look for DOS Signature "MZ"
   ushort dosSig = memReader.PeekUInt16(0);
   if (dosSig != PEFileConstants.DosSignature) {
     this.ErrorContainer.AddBinaryError(0, MetadataReaderErrorKind.DosHeader);
     return false;
   }
   //  Skip the DOS Header
   int ntHeaderOffset = memReader.PeekInt32(PEFileConstants.PESignatureOffsetLocation);
   if (!memReader.SeekOffset(ntHeaderOffset)) {
     this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.FileSizeTooSmall);
     return false;
   }
   //  Look for PESignature "PE\0\0"
   uint NTSignature = memReader.ReadUInt32();
   if (NTSignature != PEFileConstants.PESignature) {
     this.ErrorContainer.AddBinaryError(memReader.Offset - sizeof(uint), MetadataReaderErrorKind.PESignature);
     return false;
   }
   //  Read the COFF Header
   if (!this.ReadCOFFFileHeader(ref memReader)) {
     return false;
   }
   //  Read the magic to determine if its PE or PE+
   PEMagic magic = (PEMagic)memReader.PeekUInt16(0);
   switch (magic) {
     case PEMagic.PEMagic32:
       if (
         !this.ReadOptionalHeaderStandardFields32(ref memReader)
         || !this.ReadOptionalHeaderNTAdditionalFields32(ref memReader)
       ) {
         return false;
       }
       break;
     case PEMagic.PEMagic64:
       if (
         !this.ReadOptionalHeaderStandardFields64(ref memReader)
         || !this.ReadOptionalHeaderNTAdditionalFields64(ref memReader)
       ) {
         return false;
       }
       break;
     default:
       this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.UnknownPEMagic);
       return false;
   }
   if (!this.ReadOptionalHeaderDirectoryEntries(ref memReader)) {
     return false;
   }
   if (!this.ReadSectionHeaders(ref memReader)) {
     return false;
   }
   this.ReaderState = ReaderState.PEFile;
   this.Win32ResourceMemoryReader = new MemoryReader(this.DirectoryToMemoryBlock(this.OptionalHeaderDirectoryEntries.ResourceTableDirectory));
   return true;
 }