//------------------------------------------------------------
// explicit copy
public void CopyFrom(SuDoKu_Cell other)
{
ivValue = other.ivValue;
ivCalculated = other.ivCalculated;
ivSet = other.ivSet;
ivOptions_Count = other.ivOptions_Count;
}
public void Options_OR(SuDoKu_Cell other)
{
uint old = ivValue;
ivValue |= other.ivValue;
if (old != ivValue)
{
ivOptions_Count = -1;
}
}
public void Options_REMOVE(SuDoKu_Cell other)
{
uint old = ivValue;
ivValue &= (~other.ivValue);
if (old != ivValue)
{
ivOptions_Count = -1;
}
}
public SuDoKu_Field(SuDoKu_Field other)
{
ivDimension = other.ivDimension;
ivGroupSize = other.ivGroupSize;
ivCells = new SuDoKu_Cell[ivGroupSize, ivGroupSize];
for (int row = 0; row < ivGroupSize; row++)
{
for (int column = 0; column < ivGroupSize; column++)
{
ivCells[row, column] = new SuDoKu_Cell(other.ivCells[row, column]);
}
}
}
protected int ivGroupSize; // the number of fields in a row/column/square
//************************************************************
public SuDoKu_Field(int MyDimension)
{
ivDimension = MyDimension;
ivGroupSize = ivDimension * ivDimension;
ivCells = new SuDoKu_Cell[ivGroupSize, ivGroupSize];
for (int row = 0; row < ivGroupSize; row++)
{
for (int column = 0; column < ivGroupSize; column++)
{
ivCells[row, column] = new SuDoKu_Cell(ivGroupSize);
}
}
}
//------------------------------------------------------------
// Try to find the correct value for all cell that have
// only 2 options left
// return true if the state is still valid
public bool Solve_Twos()
{
for (int row = 0; row < ivGroupSize; ++row)
{
for (int column = 0; column < ivGroupSize; column++)
{
SuDoKu_Cell c = ivCells[row, column];
if (!c.isSet && c.Options_Count == 2)
{
SuDoKu_Field old = new SuDoKu_Field(this);
int v = c.Options_First;
set(row, column, v);
// if (! Solve_Ones() )
}
}
}
return(true);
}
//------------------------------------------------------------
public void FromString(string Data)
{
string[] Fields = Data.Split('\n');
ivDimension = int.Parse(Fields[0]);
ivGroupSize = ivDimension * ivDimension;
ivCells = new SuDoKu_Cell[ivGroupSize, ivGroupSize];
int i = 0;
for (int row = 0; row < ivGroupSize; ++row)
{
for (int column = 0; column < ivGroupSize; ++column)
{
ivCells[row, column] = new SuDoKu_Cell(Fields[i]);
++i;
}
}
}
//------------------------------------------------------------
// Set the value for all cells that have only one option less
// return true if the state is still valid
public bool Solve_Ones()
{
for (int row = 0; row < ivGroupSize; ++row)
{
for (int column = 0; column < ivGroupSize; column++)
{
SuDoKu_Cell c = ivCells[row, column];
if (!c.isSet)
{
int v = c.Value;
if (v < 0)
{
return(false);
}
if (v > 0)
{
set(row, column, v);
return(Solve_Ones());
}
}
}
}
return(true);
}
//------------------------------------------------------------
// copy constructor
public SuDoKu_Cell(SuDoKu_Cell other)
{
CopyFrom(other);
}