/// <summary> <!-- {{{1 --> Constructor
/// </summary>
/// <param name="idx"></param>
public Cell(SudokuCellIndex idx)
{
idx.AssertWhenInvalid();
this.index = idx;
this.candidate = new Candidates();
this.value = SudokuValue.NA;
}
/// <summary> <!-- {{{1 --> Throw exception when specified different cell index.
/// </summary>
/// <param name="self"></param>
/// <param name="tgt"></param>
public static void AssertWhenIndexNotEquals(this SudokuCellIndex self, SudokuCellIndex tgt)
{
if (!self.IsEquals(tgt))
{
var msg = string.Format("Different cell index: {0} != {1}", self.ToStr(), tgt.ToStr());
throw new InvalidEnumArgumentException(msg);
}
}
/// <summary> <!-- {{{1 --> Throw exception when specified index is invalid.
/// </summary>
/// <param name="self"></param>
public static void AssertWhenInvalid(this SudokuCellIndex self)
{
if (self.IsInvalid())
{
var msg = string.Format("Invalid cell index: {0}", self.ToStr());
throw new ArgumentOutOfRangeException(msg);
}
}
/// <summary> <!-- {{{1 --> Convert from cell index to house index
/// </summary>
/// <param name="self"></param>
/// <returns></returns>
public static SudokuHouseIndex ToHouseIndex(this SudokuCellIndex self)
{
var row = (int)self / 9;
var col = (int)self % 9;
var houserow = row / 3;
var housecol = col / 3;
return((SudokuHouseIndex)(houserow * 3 + housecol));
}
public void TestToHouseIndex()
{
var exps = new int[] {
0, 0, 0, 1, 1, 1, 2, 2, 2,
0, 0, 0, 1, 1, 1, 2, 2, 2,
0, 0, 0, 1, 1, 1, 2, 2, 2,
3, 3, 3, 4, 4, 4, 5, 5, 5,
3, 3, 3, 4, 4, 4, 5, 5, 5,
3, 3, 3, 4, 4, 4, 5, 5, 5,
6, 6, 6, 7, 7, 7, 8, 8, 8,
6, 6, 6, 7, 7, 7, 8, 8, 8,
6, 6, 6, 7, 7, 7, 8, 8, 8
}.Select(x => (SudokuHouseIndex)x);
for (var i = 0; i < 81; i++)
{
tgt = (SudokuCellIndex)i;
var ans = tgt.ToHouseIndex();
var exp = exps.ElementAt(i);
Assert.Equal(exp, ans);
}
}
/// <summary> <!-- {{{1 --> Convert the index to String
/// </summary>
/// <param name="self"></param>
/// <returns></returns>
public static string ToStr(this SudokuCellIndex self)
{
return(self.ToInt().ToString());
}
/// <summary> <!-- {{{1 --> Convert the index to Integer
/// </summary>
/// <param name="self"></param>
/// <returns></returns>
public static int ToInt(this SudokuCellIndex self)
{
return((int)self);
}
/// <summary> <!-- {{{1 --> Return true if the cells have same index.
/// </summary>
/// <param name="self"></param>
/// <param name="tgt"></param>
/// <returns></returns>
public static bool IsEquals(this SudokuCellIndex self, SudokuCellIndex tgt)
{
return(self == tgt);
}
/// <summary> <!-- {{{1 --> Return true if the index is invalid.
/// </summary>
/// <param name="self"></param>
/// <returns></returns>
public static bool IsInvalid(this SudokuCellIndex self)
{
return((SudokuCellIndex.MIN > self) || (SudokuCellIndex.MAX < self));
}
/// <summary> <!-- {{{1 --> Get cell from cell index
/// </summary>
/// <param name="idx"></param>
/// <returns></returns>
public Cell CellFromIndex(SudokuCellIndex idx)
{
idx.AssertWhenInvalid();
return(this.board.ElementAt(idx.ToInt()));
}
/// <summary> <!-- {{{1 --> teardown
/// </summary>
public void Dispose()
{
tgt = SudokuCellIndex.MIN;
}
/// <summary> <!-- {{{1 --> Setup
/// </summary>
public TestCellExtension()
{
tgt = SudokuCellIndex.MIN;
}