private static BFOpcode ParseInstrWithStringLiteralArgs(
BFInstruction instr, string stringLiteral, int lineIndex, int opIndex,
List<Tuple<string, int>> unresolvedProcs, List<Tuple<string, int>> unresolvedJumps)
{
switch (instr)
{
case BFInstruction.BeginProcedure:
case BFInstruction.CallProcedure:
unresolvedProcs.Add(Tuple.Create(stringLiteral, opIndex));
break;
case BFInstruction.CallNative:
BFCallNativeType callType;
if (!Enum.TryParse(stringLiteral, true, out callType))
throw new BFASMParserException(instr, lineIndex + 1);
return new BFOpcode(instr, (int)callType);
case BFInstruction.Jump:
case BFInstruction.JumpIfFalse:
string jumpLabelName = stringLiteral.Split(new char[] { '@', ':' }, StringSplitOptions.RemoveEmptyEntries)[0];
if (jumpLabelName.Length == 0)
throw new BFASMParserException(instr, lineIndex + 1);
unresolvedJumps.Add(Tuple.Create(jumpLabelName, opIndex));
break;
}
// actual operand value will be resolved later, so just set it to -1 for now
return new BFOpcode(instr, -1);
}
private static BFOpcode ParseInstrWithDecimalLiteralArgs(BFInstruction instr, string[] tokens, int lineIndex)
{
float value;
if (!float.TryParse(tokens[1], out value))
throw new BFASMParserException(instr, lineIndex + 1);
return new BFOpcode(instr, value);
}
internal BFOpcode(BFInstruction instruction, int codeBlockIndex, IConvertible operand)
{
_instr = (ushort)instruction;
_codeBlockIndex = codeBlockIndex;
SetOperand(operand);
}
private static void VerifyArgCount(BFInstruction instr, string[] tokens, int lineIndex)
{
switch (instr)
{
case BFInstruction.PushUInt32:
case BFInstruction.PushFloat:
case BFInstruction.BeginProcedure:
case BFInstruction.CallNative:
case BFInstruction.CallProcedure:
case BFInstruction.Jump:
case BFInstruction.JumpIfFalse:
case BFInstruction.PushUInt16:
case BFInstruction.PushVariable:
case BFInstruction.SetVariable:
if (tokens.Length < 2)
throw new BFASMParserException(instr, lineIndex + 1);
break;
}
}
public BFOpcode(BFInstruction instruction, IConvertible operand)
{
_instr = (ushort)instruction;
SetOperand(operand);
}
