private static int byteInstruction(string name, ref Chunk_t chunk, int offset)
{
byte slot = chunk.code[offset + 1];
System.Console.WriteLine("{0,-16}{1,4}", name, slot.ToString());
return(offset + 2);
}
private static int jumpInstruction(string name, int sign, ref Chunk_t chunk, int offset)
{
ushort jump = (ushort)(chunk.code[offset + 1] << 8);
jump |= (ushort)chunk.code[offset + 2];
System.Console.WriteLine("{0,-16}{1,4} -> {2}", name, offset.ToString(), (offset + 3 + sign * jump).ToString());
return(offset + 3);
}
public static void disassembleChunk(ref Chunk_t chunk, char[] name)
{
System.Console.WriteLine("== {0} ==", new string(name, 0, name.Length - 1));
for (int offset = 0; offset < chunk.count;)
{
offset = disassembleInstruction(ref chunk, offset);
}
}
private static int constantInstruction(string name, ref Chunk_t chunk, int offset)
{
byte constant = chunk.code[offset + 1];
System.Console.Write("{0,-16} {1,4} '", name, constant.ToString());
Value.printValue(chunk.constants.values[constant]);
System.Console.WriteLine("'");
return(offset + 2);
}
private static int invokeInstruction(string name, ref Chunk_t chunk, int offset)
{
byte constant = chunk.code[offset + 1];
byte argCount = chunk.code[offset + 2];
System.Console.Write("{0,-16} ({1} args) {2,4} '", name, argCount.ToString(), constant.ToString());
Value.printValue(chunk.constants.values[constant]);
System.Console.WriteLine();
return(offset + 3);
}
public static int disassembleInstruction(ref Chunk_t chunk, int offset)
{
System.Console.Write("{0} ", offset.ToString("D4"));
if (offset > 0 && chunk.lines[offset] == chunk.lines[offset - 1])
{
System.Console.Write(" | ");
}
else
{
System.Console.Write("{0,4} ", chunk.lines[offset].ToString());
}
OpCode instruction = (OpCode)chunk.code[offset];
switch (instruction)
{
case OpCode.OP_CONSTANT:
return(constantInstruction("OP_CONSTANT", ref chunk, offset));
case OpCode.OP_NIL:
return(simpleInstruction("OP_NIL", offset));
case OpCode.OP_TRUE:
return(simpleInstruction("OP_TRUE", offset));
case OpCode.OP_FALSE:
return(simpleInstruction("OP_FALSE", offset));
case OpCode.OP_POP:
return(simpleInstruction("OP_POP", offset));
case OpCode.OP_GET_LOCAL:
return(byteInstruction("OP_GET_LOCAL", ref chunk, offset));
case OpCode.OP_SET_LOCAL:
return(byteInstruction("OP_SET_LOCAL", ref chunk, offset));
case OpCode.OP_GET_GLOBAL:
return(constantInstruction("OP_GET_GLOBAL", ref chunk, offset));
case OpCode.OP_DEFINE_GLOBAL:
return(constantInstruction("OP_DEFINE_GLOBAL", ref chunk, offset));
case OpCode.OP_SET_GLOBAL:
return(constantInstruction("OP_SET_GLOBAL", ref chunk, offset));
case OpCode.OP_GET_UPVALUE:
return(byteInstruction("OP_GET_UPVALUE", ref chunk, offset));
case OpCode.OP_SET_UPVALUE:
return(byteInstruction("OP_SET_UPVALUE", ref chunk, offset));
case OpCode.OP_GET_PROPERTY:
return(constantInstruction("OP_GET_PROPERTY", ref chunk, offset));
case OpCode.OP_SET_PROPERTY:
return(constantInstruction("OP_SET_PROPERTY", ref chunk, offset));
case OpCode.OP_GET_SUPER:
return(constantInstruction("OP_GET_SUPER", ref chunk, offset));
case OpCode.OP_EQUAL:
return(simpleInstruction("OP_EQUAL", offset));
case OpCode.OP_GREATER:
return(simpleInstruction("OP_GREATER", offset));
case OpCode.OP_LESS:
return(simpleInstruction("OP_LESS", offset));
case OpCode.OP_ADD:
return(simpleInstruction("OP_ADD", offset));
case OpCode.OP_SUBTRACT:
return(simpleInstruction("OP_SUBTRACT", offset));
case OpCode.OP_MULTIPLY:
return(simpleInstruction("OP_MULTIPLY", offset));
case OpCode.OP_DIVIDE:
return(simpleInstruction("OP_DIVIDE", offset));
case OpCode.OP_NOT:
return(simpleInstruction("OP_NOT", offset));
case OpCode.OP_NEGATE:
return(simpleInstruction("OP_NEGATE", offset));
case OpCode.OP_PRINT:
return(simpleInstruction("OP_PRINT", offset));
case OpCode.OP_JUMP:
return(jumpInstruction("OP_JUMP", 1, ref chunk, offset));
case OpCode.OP_JUMP_IF_FALSE:
return(jumpInstruction("OP_JUMP_IF_FALSE", 1, ref chunk, offset));
case OpCode.OP_LOOP:
return(jumpInstruction("OP_LOOP", -1, ref chunk, offset));
case OpCode.OP_CALL:
return(byteInstruction("OP_CALL", ref chunk, offset));
case OpCode.OP_INVOKE:
return(invokeInstruction("OP_INVOKE", ref chunk, offset));
case OpCode.OP_SUPER_INVOKE:
return(invokeInstruction("OP_SUPER_INVOKE", ref chunk, offset));
case OpCode.OP_CLOSURE:
{
offset++;
byte constant = chunk.code[offset++];
System.Console.Write("{0,-16} {1,4} ", "OP_CLOSURE ", constant.ToString());
Value.printValue(chunk.constants.values[constant]);
System.Console.WriteLine();
ObjFunction function = Object.AS_FUNCTION(chunk.constants.values[constant]);
for (int j = 0; j < function.upvalueCount; j++)
{
int isLocal = chunk.code[offset++];
int index = chunk.code[offset++];
System.Console.WriteLine("{0} | {1} {2}", (offset - 2).ToString("D4"), ((isLocal != 0) ? "local" : "upvalue"), index.ToString());
}
return(offset);
}
case OpCode.OP_CLOSE_UPVALUE:
return(simpleInstruction("OP_CLOSE_UPVALUE", offset));
case OpCode.OP_RETURN:
return(simpleInstruction("OP_RETURN", offset));
case OpCode.OP_CLASS:
return(constantInstruction("OP_CLASS", ref chunk, offset));
case OpCode.OP_INHERIT:
return(simpleInstruction("OP_INHERIT", offset));
case OpCode.OP_METHOD:
return(constantInstruction("OP_METHOD", ref chunk, offset));
default:
System.Console.WriteLine("Unkown opcode " + ((byte)instruction).ToString());
return(offset + 1);
}
}
