コード例 #1
0
        public static Attributes ReadAttributes(BytecodeReader reader, ushort attributesCount)
        {
            Attributes attributes = new Attributes();
            Dictionary <String, Action> attributeNameDictionary = new Dictionary <string, Action>();

            attributeNameDictionary.Add("Code", () =>
            {
                ushort attributeNameIndex = reader.ReadUShort();
                uint attributeLength      = reader.ReadUInt();
                ushort maxStack           = reader.ReadUShort();
                ushort maxLocals          = reader.ReadUShort();
                uint codeLength           = reader.ReadUInt();
                byte[] code = reader.ReadBytes(codeLength);
                ushort exceptionTableLength = reader.ReadUShort();
                byte[] exceptionTable       = reader.ReadBytes((uint)exceptionTableLength * 8);
                ushort codeAttributesCount  = reader.ReadUShort();
                Attributes codeAttributes   = ReadAttributes(reader, codeAttributesCount);
                attributes.AddAttributeCode(attributeNameIndex, attributeLength,
                                            maxStack, maxLocals, codeLength, code, exceptionTableLength,
                                            exceptionTable, attributesCount, attributes);
            });
            short attributeIndex  = 0;
            var   attributesTable = new List <AttributeSuper>();
            int   curAttributeNameIndex;

            while (attributesCount > attributeIndex)
            {
                curAttributeNameIndex = bytecode[index] * 0x100 + bytecode[index + 1];
                switch (cp.getConstantUtf8(curAttributeNameIndex).Value)
                {
                case "Code":
                    attributesTable.Add(AttributeCode.Create(bytecode, cp));
                    attributeIndex++;
                    break;

                case "ConstantValue":
                    // TODO: not skipping bytes
                    Console.WriteLine("ConstantValue attribute was created");
                    attributesTable.Add(AttributeSuper.Create(bytecode));
                    index += (int)attributesTable.Last().AttributeLength;
                    attributeIndex++;
                    break;

                case "StackMapTable":
                    // TODO: not skipping bytes
                    Console.WriteLine("StackMapTable attribute was created");
                    attributesTable.Add(AttributeSuper.Create(bytecode));
                    index += (int)attributesTable.Last().AttributeLength;
                    attributeIndex++;
                    break;

                case "BootstrapMethods":
                    // TODO: not skipping bytes
                    Console.WriteLine("BootstrapMethods attribute was created");
                    attributesTable.Add(AttributeSuper.Create(bytecode));
                    index += (int)attributesTable.Last().AttributeLength;
                    attributeIndex++;
                    break;

                case "LineNumberTable":
                    attributesTable.Add(AttributeLineNumberTable.Create(bytecode, cp));
                    attributeIndex++;
                    break;

                case "SourceFile":
                    attributesTable.Add(AttributeSourceFile.Create(bytecode, cp));
                    attributeIndex++;
                    break;

                default:
                    attributeIndex++;
                    Console.WriteLine("no attribute found");
                    break;
                }
            }
            return(new Attributes(attributesTable));
        }