/// <summary>
/// Makes UnaryAssignment instruction type from NoOperation
/// </summary>
/// <param name="left_value">Left value (variable only)</param>
/// <param name="right_value">Right value (variable only, can be the same as a left value)</param>
/// <param name="operation">Unary operation</param>
public static void UnaryAssignment(Instruction ins, Variable left_value, Variable right_value, Instruction.UnaryOperationType operation)
{
if (ins.statementType != Objects.Common.StatementType.NoOperation)
{
throw new ObfuscatorException("Only NoOperation instruction can be modified to other type!");
}
if (left_value == null)
{
throw new ObfuscatorException("Wrong parameter passing: missing left value.");
}
if (right_value == null)
{
throw new ObfuscatorException("Wrong parameter passing: missing right value.");
}
string op = string.Empty;
switch (operation)
{
case Instruction.UnaryOperationType.ArithmeticNegation:
op = "-";
break;
case Instruction.UnaryOperationType.LogicalNegation:
op = "!";
break;
default:
throw new ObfuscatorException("Unsupported unary operation type.");
}
ins.RefVariables.Clear();
ins.RefVariables.Add(left_value);
if (!left_value.Equals(right_value))
{
ins.RefVariables.Add(right_value);
}
ins.statementType = Objects.Common.StatementType.UnaryAssignment;
ins.TACtext = string.Join(" ", left_value.name, ":=", op, right_value.name);
}
/// <summary>
/// Parses a unary assignment instruction
/// </summary>
/// <param name="inst">Instruction to be parsed</param>
/// <param name="left_value">Left value of the assignment (variable only)</param>
/// <param name="right_value">Right value of the assignment (variable only)</param>
/// <param name="operation">Unary operator</param>
public static void UnaryAssignment(Instruction inst, out Variable left_value, out Variable right_value, out Instruction.UnaryOperationType operation)
{
Validate(inst, Objects.Common.StatementType.UnaryAssignment);
System.Collections.Specialized.StringCollection refvarIDs = new System.Collections.Specialized.StringCollection();
Match matchResult = Regex.Match(inst.TACtext, "ID_[A-F0-9]{8}(?:-[A-F0-9]{4}){3}-[A-F0-9]{12}", RegexOptions.None);
while (matchResult.Success)
{
refvarIDs.Add(matchResult.Value);
matchResult = matchResult.NextMatch();
}
left_value = inst.RefVariables.Find(x => x.ID == refvarIDs[0]);
right_value = inst.RefVariables.Find(x => x.ID == refvarIDs[1]);
switch (inst.TACtext.Split(' ')[2])
{
case "-":
operation = Instruction.UnaryOperationType.ArithmeticNegation;
break;
case "!":
operation = Instruction.UnaryOperationType.LogicalNegation;
break;
default:
throw new ParserException("Unsupported unary operation type.");
}
}
