private void Reset()
{
EIP = 0;
TempPool.Clear();
RuntimeStack.Clear();
VarSeg = Generator.VarSeg;
DataSegment = new int[Generator.VarSeg.Count];
Initialized = new bool[Generator.VarSeg.Count];
for (int i = 0; i < DataSegment.Length; ++i)
{
DataSegment[i] = 0;
Initialized[i] = false;
}
}
private void Execute(PNode cmd)
{
switch (cmd.INS)
{
case PCode.OPR:
switch (cmd.Arg)
{
case 1:
Push(-Pop());
break;
case 2:
Push(Pop() + Pop());
break;
case 3:
int tmp1 = Pop();
Push(Pop() - tmp1);
break;
case 4:
Push(Pop() * Pop());
break;
case 5:
tmp1 = Pop();
Push(Pop() / tmp1);
break;
case 6:
Push(Math.Abs(Pop()) & 1);
break;
case 7:
Push(~(Math.Abs(Pop()) & 1));
break;
case 8:
PushBoolean(Pop() == Pop());
break;
case 9:
PushBoolean(Pop() != Pop());
break;
case 10:
PushBoolean(Pop() > Pop());
break;
case 11:
PushBoolean(Pop() <= Pop());
break;
case 12:
PushBoolean(Pop() < Pop());
break;
case 13:
PushBoolean(Pop() >= Pop());
break;
}
break;
case PCode.CAL:
Push(EIP + 1);
EIP = cmd.Arg;
return;
case PCode.EXP:
TempPool.Clear();
EIP = Pop();
return;
case PCode.HALT:
return;
case PCode.JMP:
EIP = cmd.Arg;
TempPool.Clear();
return;
case PCode.JPC:
if (Pop() == 1)
{
EIP++;
}
else
{
EIP = cmd.Arg;
}
TempPool.Clear();
return;
case PCode.LIT:
Push(cmd.Arg);
break;
case PCode.LOD:
if (cmd.DataType == 3)
{
if (Initialized[cmd.Arg] == false)
{
throw new Exception($"使用了未初始化的变量{VarSeg[cmd.Arg].Value}");
}
Push(DataSegment[cmd.Arg]);
}
else
{
Push(TempPool[cmd.Arg]);
}
break;
case PCode.RED:
string i;
if (WriteString == null)
{
Console.WriteLine($"Please input a value for {VarSeg[cmd.Arg].Value}");
}
else
{
WriteString($"Please input a value for {VarSeg[cmd.Arg].Value}");
}
if (Read == null)
{
i = Console.ReadLine();
}
else
{
i = Read();
}
int res;
while (!int.TryParse(i, out res))
{
if (WriteString != null)
{
WriteString("Please input a legal INT");
}
else
{
Console.WriteLine("Please input a legal INT");
}
if (Read != null)
{
i = Read();
}
else
{
i = Console.ReadLine();
}
}
Initialized[cmd.Arg] = true;
DataSegment[cmd.Arg] = res;
break;
case PCode.STO:
if (cmd.DataType == 3)
{
Initialized[cmd.Arg] = true;
DataSegment[cmd.Arg] = Pop();
}
else
{
if (TempPool.ContainsKey(cmd.Arg))
{
TempPool[cmd.Arg] = Pop();
}
else
{
TempPool.Add(cmd.Arg, Pop());
}
}
break;
case PCode.WRT:
if (Write == null)
{
Console.WriteLine(Pop());
}
else
{
Write(Pop());
}
break;
}
++EIP;
}