private static bool IsValid(GateType gateType, int inputCount)
{
Tracer.Assert(GateSet.IsValid(gateType));
switch (gateType)
{
case GateType.Nop:
case GateType.Clock:
return(inputCount == 0);
case GateType.Not:
return(inputCount == 1);
case GateType.Or:
case GateType.And:
case GateType.Xor:
return(1 < inputCount && inputCount <= LogicCircuit.Gate.MaxInputCount);
case GateType.Led:
return(inputCount == 1 || inputCount == 8);
case GateType.TriState1:
case GateType.TriState2:
return(inputCount == 2);
case GateType.Odd:
case GateType.Even:
case GateType.Probe:
Tracer.Fail();
return(false);
default:
return(false);
}
}
private static Guid GateGuid(GateType gateType, int inputCount, bool invertedOutput)
{
Tracer.Assert(gateType != GateType.Nop && GateSet.IsValid(gateType, inputCount) && (!invertedOutput || GateSet.HasOutput(gateType)));
return(new Guid(0, 0, 0, 0, 0, 0, 0, 0,
(byte)(int)gateType,
(byte)inputCount,
(byte)(invertedOutput ? 1 : 0)
));
}
public Gate Gate(Guid gateId)
{
Gate gate = this.FindByGateId(gateId);
if (gate != null)
{
return(gate);
}
byte[] id = gateId.ToByteArray();
GateType gateType = (GateType)(int)id[13];
int inputCount = (int)id[14];
bool invertedOutput = (id[15] == 0) ? false : true;
if (GateSet.IsValid(gateType) && GateSet.IsValid(gateType, inputCount) && (!invertedOutput || GateSet.HasOutput(gateType)) && GateSet.GateGuid(gateType, inputCount, invertedOutput) == gateId)
{
return(this.Create(gateType, inputCount, invertedOutput));
}
return(null);
}
public Gate Gate(GateType gateType, int inputCount, bool invertedOutput)
{
if (!GateSet.IsValid(gateType))
{
throw new ArgumentOutOfRangeException("gateType");
}
if (!GateSet.IsValid(gateType, inputCount))
{
throw new ArgumentOutOfRangeException("inputCount");
}
if (invertedOutput && !GateSet.HasOutput(gateType))
{
throw new ArgumentOutOfRangeException("invertedOutput");
}
Gate gate = this.FindByGateId(GateSet.GateGuid(gateType, inputCount, invertedOutput));
if (gate == null)
{
return(this.Create(gateType, inputCount, invertedOutput));
}
return(gate);
}
private static bool HasOutput(GateType gateType)
{
Tracer.Assert(GateSet.IsValid(gateType));
return(gateType != GateType.Nop && gateType != GateType.Led);
}