public static Definition.Sudoku Copy(this Definition.Sudoku source)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
var target = new Definition.Sudoku();
using (var sourceIterator = new SudokuElementEnumerable(source).GetEnumerator())
using (var targetIterator = new SudokuElementEnumerable(target).GetEnumerator())
{
while (sourceIterator.MoveNext() & targetIterator.MoveNext())
{
var sourceElement = sourceIterator.Current;
var targetElement = targetIterator.Current;
if (sourceElement.HasValue)
{
targetElement.SetValue(sourceElement.Value);
}
else
{
targetElement.ClearValue();
}
}
}
return(target);
}
public static void UpdateByValued(this Definition.Sudoku source, Definition.Sudoku other)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (other == null)
{
throw new ArgumentNullException("other");
}
using (var sourceIterator = new SudokuElementEnumerable(source).GetEnumerator())
using (var otherIterator = new SudokuElementEnumerable(other).GetEnumerator())
{
while (sourceIterator.MoveNext() & otherIterator.MoveNext())
{
var sourceElement = sourceIterator.Current;
var otherElement = otherIterator.Current;
if (!sourceElement.HasValue && otherElement.HasValue)
{
sourceElement.SetValue(otherElement.Value);
}
}
}
}
public static bool TryParse(string source, out Definition.Sudoku sudoku)
{
sudoku = null;
if (string.IsNullOrEmpty(source))
{
return(false);
}
int size = SUDOKU_SPLIT_LEN;
string[] lines = source.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
if (lines.Length != size)
{
return(false);
}
int[] elementValues = new int[size * size];
int valueIndex = 0;
foreach (var line in lines)
{
int[] values;
if (!TryParse(line, out values))
{
return(false);
}
Array.Copy(values, 0, elementValues, valueIndex++ *size, size);
}
sudoku = new Definition.Sudoku();
using (var sudokuElementIterator = new SudokuElementEnumerable(sudoku, SudokuElementTravelType.Row).GetEnumerator())
using (var valueIterator = elementValues.AsEnumerable().GetEnumerator())
{
while (sudokuElementIterator.MoveNext() && valueIterator.MoveNext())
{
var element = sudokuElementIterator.Current;
int value = valueIterator.Current;
if (value > 0)
{
element.SetValue(value);
}
}
}
return(true);
}
static bool InputSudoku(out Definition.Sudoku sudoku)
{
sudoku = null;
Console.WriteLine("input sudoku data:");
Console.WriteLine();
Console.WriteLine("(whitespace to separate elements");
Console.WriteLine(" _ to indicate empty element");
Console.WriteLine(" new line to separete rows");
Console.WriteLine(" esc to cancel)");
Console.WriteLine();
bool cancelled = false;
int size = SudokuHelper.SUDOKU_SPLIT_LEN;
int[] values = new int[size * size];
for (int i = 0; i < size;)
{
Console.WriteLine("line " + (i + 1));
StringBuilder lineBuilder = new StringBuilder();
bool endOfLine = false;
while (!endOfLine && !cancelled)
{
var key = Console.ReadKey();
switch (key.Key)
{
case ConsoleKey.Enter:
endOfLine = true;
break;
case ConsoleKey.Escape:
cancelled = true;
break;
case ConsoleKey.Backspace:
if (lineBuilder.Length > 0)
{
lineBuilder.Remove(lineBuilder.Length - 1, 1);
}
break;
}
switch (key.KeyChar)
{
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '_':
case ' ':
lineBuilder.Append(key.KeyChar);
break;
default: break;
}
}
if (cancelled)
{
Console.WriteLine("cancelled");
return(false);
}
int[] lineValues;
if (!SudokuHelper.TryParse(lineBuilder.ToString(), out lineValues))
{
Console.WriteLine("wrong line data");
i--;
continue;
}
Array.Copy(lineValues, 0, values, i++ *size, size);
Console.WriteLine();
}
sudoku = new Definition.Sudoku();
using (var sudokuElementIterator = new SudokuElementEnumerable(sudoku, SudokuElementTravelType.Row).GetEnumerator())
using (var valueIterator = values.AsEnumerable().GetEnumerator())
{
while (sudokuElementIterator.MoveNext() && valueIterator.MoveNext())
{
var element = sudokuElementIterator.Current;
int value = valueIterator.Current;
if (value > 0)
{
element.SetValue(value);
}
}
}
if (!sudoku.Validate())
{
sudoku = null;
Console.WriteLine("invalid sudoku data");
return(false);
}
return(true);
}
