public static IConstantInfo ReadConstantInfo(this ClassReader reader, ConstantPool pool)
{
var tag = reader.ReadU1();
var type = (ConstantType)tag;
switch (type)
{
case ConstantType.Class:
return(new ClassConstantInfo(pool, reader.ReadU2()));
case ConstantType.FieldRef:
return(new FieldRefConstantInfo(pool, reader.ReadU2(), reader.ReadU2()));
case ConstantType.MethodRef:
return(new MethodRefConstantInfo(pool, reader.ReadU2(), reader.ReadU2()));
case ConstantType.InterfaceMethodRef:
return(new InterfaceMethodRefConstantInfo(pool, reader.ReadU2(), reader.ReadU2()));
case ConstantType.String:
return(new StringConstantInfo(pool, reader.ReadU2()));
case ConstantType.Integer:
return(new IntegerConstantInfo(reader.ReadInt()));
case ConstantType.Float:
return(new FloatConstantInfo(reader.ReadFloat()));
case ConstantType.Long:
return(new LongConstantInfo(reader.ReadLong()));
case ConstantType.Double:
return(new DoubleConstantInfo(reader.ReadDouble()));
case ConstantType.NameAndType:
return(new NameAndTypeConstantInfo(reader.ReadU2(), reader.ReadU2()));
case ConstantType.Utf8:
return(new Utf8ConstantInfo(reader.ReadUTF()));
case ConstantType.MethodHandle:
break;
case ConstantType.MethodType:
break;
case ConstantType.InvokeDynamic:
break;
default:
throw new ArgumentOutOfRangeException();
}
throw new NotImplementedException();
}
public MemberInfo(ClassReader classReader, ConstantPool constantPool)
{
this.accessFlag = classReader.ReadU2();
this.nameIndex = classReader.ReadU2();
this.descriptorIndex = classReader.ReadU2();
this.attributesCount = classReader.ReadU2();
this.attributes = new AttributeInfo[this.attributesCount];
for (int i = 0; i < this.attributesCount; i++)
{
this.attributes[i] = AttributeInfoReader.Read(classReader, constantPool);
}
}
private static LineNumberTableEntry[] ReadLineNumberTableEntrys(this ClassReader reader)
{
var count = reader.ReadU2();
var tables = new LineNumberTableEntry[count];
for (var i = 0; i < tables.Length; i++)
{
tables[i] = new LineNumberTableEntry()
{
StartPc = reader.ReadU2(),
LineNumber = reader.ReadU2()
};
}
return(tables);
}
private static ExceptionTable[] ReadExceptionTables(this ClassReader reader)
{
var count = reader.ReadU2();
var tables = new ExceptionTable[count];
for (int i = 0; i < tables.Length; i++)
{
tables[i] = new ExceptionTable()
{
StartPc = reader.ReadU2(),
EndPc = reader.ReadU2(),
HandlePc = reader.ReadU2(),
CatchType = reader.ReadU2()
};
}
return(tables);
}
public static IAttribute ReadAttribute(this ClassReader reader, ConstantPool pool)
{
var nameIndex = reader.ReadU2();
var length = reader.ReadU4();
var name = pool.GetUtf8String(nameIndex);
if (!Enum.TryParse <AttributeType>(name, true, out var type))
{
type = AttributeType.Unparsed;
}
switch (type)
{
case AttributeType.Deprecated:
return(new DeprecatedAttribute());
case AttributeType.Synthetic:
return(new SyntheticAttribute());
case AttributeType.SourceFile:
var fileNameIndex = reader.ReadU2();
return(new SourceFileAttribute(pool.GetUtf8String(fileNameIndex)));
case AttributeType.ConstantValue:
var constantIndex = reader.ReadU2();
return(new ConstantValueAttribute(pool.GetConstant(constantIndex)));
case AttributeType.Code:
ushort stack = reader.ReadU2(), locals = reader.ReadU2();
var codelength = reader.ReadU4();
var code = reader.ReadBytes((int)codelength);
return(new CodeAttribute(stack, locals, code, ReadExceptionTables(reader), ReadAttributes(reader, pool)));
case AttributeType.Exceptions:
return(new ExceptionsAttribute(reader.ReadU2S()));
case AttributeType.LineNumberTable:
return(new LineNumberTableAttribute(ReadLineNumberTableEntrys(reader)));
case AttributeType.LocalVariableTable:
return(new LocalVariableTableAttribute(ReadLocalVariableTableEntrys(reader)));
}
return(new UnparsedAttribute(reader.ReadBytes((int)length)));
}
public static IAttribute[] ReadAttributes(this ClassReader reader, ConstantPool pool)
{
var count = reader.ReadU2();
var attributes = new IAttribute[count];
for (int i = 0; i < attributes.Length; i++)
{
attributes[i] = ReadAttribute(reader, pool);
}
return(attributes);
}
public static IConstantInfo[] ReadConstantInfos(this ClassReader reader, ConstantPool pool)
{
var count = reader.ReadU2();
var infos = new IConstantInfo[count];
for (int i = 1; i < infos.Length; i++)
{
infos[i] = reader.ReadConstantInfo(pool);
if (infos[i].Type == ConstantType.Double || infos[i].Type == ConstantType.Long)
{
i++;
}
}
return(infos);
}
public static AttributeInfo Read(ClassReader classReader, ConstantPool constantPool)
{
ushort attributeNameIndex = classReader.ReadU2();
string attributeName = Encoding.UTF8.GetString(((ConstantUtf8)constantPool.ConstantPoolInfo[attributeNameIndex]).Bytes);
AttributeInfo attributeInfo = null;
switch (attributeName)
{
case "ConstantValue":
attributeInfo = new ConstantValue(); break;
case "Code":
attributeInfo = new Code(); break;
case "Deprecated":
attributeInfo = new Deprecated(); break;
case "LineNumberTable":
attributeInfo = new LineNumberTable(); break;
case "LocalVariableTable":
attributeInfo = new LocalVariableTable(); break;
case "SourceFile":
attributeInfo = new SourceFile(); break;
case "Synthetic":
attributeInfo = new Synthetic(); break;
case "Exceptions":
attributeInfo = new Exceptions(); break;
case "Signature":
attributeInfo = new Signature(); break;
//case "StackMapTable":
// attributeInfo = null;
default:
throw new Exception("no such attribute error");
}
attributeInfo.AttributeName = attributeName;
attributeInfo.ReadAttributeInfo(classReader, constantPool);
return(attributeInfo);
}
private static LocalVariableTableEntry[] ReadLocalVariableTableEntrys(this ClassReader reader)
{
var count = reader.ReadU2();
var tables = new LocalVariableTableEntry[count];
for (var i = 0; i < tables.Length; i++)
{
tables[i] = new LocalVariableTableEntry()
{
StartPc = reader.ReadU2(),
Length = reader.ReadU2(),
NameIndex = reader.ReadU2(),
DescriptorIndex = reader.ReadU2(),
Index = reader.ReadU2()
};
}
return(tables);
}
