public static ConstantPoolEntry FromMemory(ref IntPtr pointer)
{
ConstantType type = (ConstantType)Marshal.ReadByte(pointer);
switch (type)
{
case ConstantType.Utf8:
ushort length = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
unsafe
{
var result = new ConstantUtf8(ModifiedUTF8Encoding.GetString((byte*)(pointer + 3), length));
pointer += 3 + length;
return result;
}
case ConstantType.Integer:
{
var result = new ConstantInteger((int)ByteSwap((uint)Marshal.ReadInt32(pointer, 1)));
pointer += 5;
return result;
}
case ConstantType.Float:
{
var result = new ConstantFloat(ValueHelper.Int32BitsToSingle((int)ByteSwap((uint)Marshal.ReadInt32(pointer, 1))));
pointer += 5;
return result;
}
case ConstantType.Long:
{
var result = new ConstantLong((long)ByteSwap((ulong)Marshal.ReadInt64(pointer, 1)));
pointer += 9;
return result;
}
case ConstantType.Double:
{
var result = new ConstantDouble(BitConverter.Int64BitsToDouble((long)ByteSwap((ulong)Marshal.ReadInt64(pointer, 1))));
pointer += 9;
return result;
}
case ConstantType.Class:
{
ushort nameIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
var result = new ConstantClass(nameIndex);
pointer += 3;
return result;
}
case ConstantType.String:
{
ushort stringIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
var result = new ConstantString(stringIndex);
pointer += 3;
return result;
}
case ConstantType.FieldReference:
{
ushort classIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
ushort nameAndTypeIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 3));
var result = new ConstantFieldReference(classIndex, nameAndTypeIndex);
pointer += 5;
return result;
}
case ConstantType.MethodReference:
{
ushort classIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
ushort nameAndTypeIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 3));
var result = new ConstantMethodReference(classIndex, nameAndTypeIndex);
pointer += 5;
return result;
}
case ConstantType.InterfaceMethodReference:
{
ushort classIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
ushort nameAndTypeIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 3));
var result = new ConstantInterfaceMethodReference(classIndex, nameAndTypeIndex);
pointer += 5;
return result;
}
case ConstantType.NameAndType:
{
ushort nameIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
ushort descriptorIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 3));
var result = new ConstantNameAndType(nameIndex, descriptorIndex);
pointer += 5;
return result;
}
case ConstantType.MethodHandle:
{
MethodHandleKind referenceKind = (MethodHandleKind)Marshal.ReadByte(pointer, 1);
ushort referenceIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 2));
var result = new ConstantMethodHandle(referenceKind, referenceIndex);
pointer += 4;
return result;
}
case ConstantType.MethodType:
{
ushort descriptorIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
var result = new ConstantMethodType(descriptorIndex);
pointer += 3;
return result;
}
case ConstantType.InvokeDynamic:
{
ushort bootstrapMethodAttrIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 1));
ushort nameAndTypeIndex = ByteSwap((ushort)Marshal.ReadInt16(pointer, 3));
var result = new ConstantInvokeDynamic(bootstrapMethodAttrIndex, nameAndTypeIndex);
pointer += 5;
return result;
}
case ConstantType.Invalid:
default:
throw new ArgumentException(string.Format("Unknown constant type: {0}", type));
}
}
public static ConstantPoolEntry FromBytes(byte[] buffer, ref int startIndex)
{
ConstantType type = (ConstantType)buffer[startIndex];
switch (type)
{
case ConstantType.Utf8:
ushort length = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 1));
unsafe
{
var result = new ConstantUtf8(ModifiedUTF8Encoding.GetString(buffer, startIndex + 3, length));
startIndex += 3 + length;
return result;
}
case ConstantType.Integer:
{
var result = new ConstantInteger((int)ByteSwap((uint)Marshal.ReadInt32(buffer, startIndex + 1)));
startIndex += 5;
return result;
}
case ConstantType.Float:
{
var result = new ConstantFloat(ValueHelper.Int32BitsToSingle((int)ByteSwap((uint)Marshal.ReadInt32(buffer, startIndex + 1))));
startIndex += 5;
return result;
}
case ConstantType.Long:
{
var result = new ConstantLong((long)ByteSwap((ulong)Marshal.ReadInt64(buffer, startIndex + 1)));
startIndex += 9;
return result;
}
case ConstantType.Double:
{
var result = new ConstantDouble(BitConverter.Int64BitsToDouble((long)ByteSwap((ulong)Marshal.ReadInt64(buffer, startIndex + 1))));
startIndex += 9;
return result;
}
case ConstantType.Class:
{
ushort nameIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 1));
var result = new ConstantClass(nameIndex);
startIndex += 3;
return result;
}
case ConstantType.String:
{
ushort stringIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 1));
var result = new ConstantString(stringIndex);
startIndex += 3;
return result;
}
case ConstantType.FieldReference:
{
ushort classIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 1));
ushort nameAndTypeIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 3));
var result = new ConstantFieldReference(classIndex, nameAndTypeIndex);
startIndex += 5;
return result;
}
case ConstantType.MethodReference:
{
ushort classIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 1));
ushort nameAndTypeIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 3));
var result = new ConstantMethodReference(classIndex, nameAndTypeIndex);
startIndex += 5;
return result;
}
case ConstantType.InterfaceMethodReference:
{
ushort classIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 1));
ushort nameAndTypeIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 3));
var result = new ConstantInterfaceMethodReference(classIndex, nameAndTypeIndex);
startIndex += 5;
return result;
}
case ConstantType.NameAndType:
{
ushort nameIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 1));
ushort descriptorIndex = ByteSwap((ushort)BitConverter.ToInt16(buffer, startIndex + 3));
var result = new ConstantNameAndType(nameIndex, descriptorIndex);
startIndex += 5;
return result;
}
case ConstantType.Invalid:
default:
throw new ArgumentException();
}
}
