public Expression GetValue()
{
return(Branch.AsExpression(m_r));
}
public override Operation Process(Decompiler d)
{
if (m_empty)
{
var expr = m_r.GetExpression(Branch.SetTarget, End);
Branch.UseExpression(expr);
return(new RegisterSet(End - 1, Branch.SetTarget, Branch.AsExpression(m_r)));
}
else if (m_assign != null)
{
Branch.UseExpression(m_assign.GetFirstValue());
var target = m_assign.GetFirstTarget();
var value = GetValue();
return(new LambdaOperation(End - 1, (r, block) => {
return new Assignment(target, value);
}));
}
else
{
return(new LambdaOperation(End - 1, (r, block) => {
Expression expr = null;
var register = 0;
for (; register < r.NumRegisters; register++)
{
if (r.GetUpdated(register, Branch.End - 1) == Branch.End - 1)
{
expr = r.GetValue(register, Branch.End);
break;
}
}
if (d.Code.Op(Branch.End - 2) == Op.LOADBOOL &&
d.Code.C(Branch.End - 2) != 0)
{
var target = d.Code.A(Branch.End - 2);
if (d.Code.Op(Branch.End - 3) == Op.JMP &&
d.Code.sBx(Branch.End - 3) == 2)
{
expr = r.GetValue(target, Branch.End - 2);
}
else
{
expr = r.GetValue(target, Branch.Begin);
}
Branch.UseExpression(expr);
if (r.IsLocal(target, Branch.End - 1))
{
return new Assignment(r.GetTarget(target, Branch.End - 1), Branch.AsExpression(r));
}
r.SetValue(target, Branch.End - 1, Branch.AsExpression(r));
}
else if (expr != null && Target >= 0)
{
Branch.UseExpression(expr);
if (r.IsLocal(Target, Branch.End - 1))
{
return new Assignment(r.GetTarget(Target, Branch.End - 1), Branch.AsExpression(r));
}
r.SetValue(Target, Branch.End - 1, Branch.AsExpression(r));
}
else
{
Console.WriteLine("-- fail " + (Branch.End - 1));
Console.WriteLine(expr);
Console.WriteLine(Target);
}
return null;
}));
}
}
public void UseAssignment(Assignment assignment)
{
m_assign = assignment;
Branch.UseExpression(assignment.GetFirstValue());
}