Added a few convenience methods.

src/apps/sudoku/SudokuField.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2007-2010, Axel Dörfler, [email protected].
+ * Copyright 2007-2012, Axel Dörfler, [email protected].
  * Distributed under the terms of the MIT License.
  */
 
@@ -280,6 +280,13 @@ SudokuField::HintMaskAt(uint32 x, uint32 y) const
 }
 
 
+bool
+SudokuField::HasHint(uint32 x, uint32 y, uint32 value) const
+{
+	return (_FieldAt(x, y).hint_mask & (1UL << (value - 1))) != 0;
+}
+
+
 void
 SudokuField::SetValidMaskAt(uint32 x, uint32 y, uint32 validMask)
 {
@@ -294,6 +301,13 @@ SudokuField::ValidMaskAt(uint32 x, uint32 y) const
 }
 
 
+bool
+SudokuField::IsValid(uint32 x, uint32 y, uint32 value) const
+{
+	return (_FieldAt(x, y).valid_mask & (1UL << (value - 1))) != 0;
+}
+
+
 void
 SudokuField::SetFlagsAt(uint32 x, uint32 y, uint32 flags)
 {
@@ -308,6 +322,13 @@ SudokuField::FlagsAt(uint32 x, uint32 y) const
 }
 
 
+bool
+SudokuField::IsInitialValue(uint32 x, uint32 y) const
+{
+	return (_FieldAt(x, y).flags & kInitialValue) != 0;
+}
+
+
 void
 SudokuField::SetValueAt(uint32 x, uint32 y, uint32 value, bool setSolved)
 {

src/apps/sudoku/SudokuField.h

@@ -41,13 +41,16 @@ public:
 			void				SetHintMaskAt(uint32 x, uint32 y,
 									uint32 hintMask);
 			uint32				HintMaskAt(uint32 x, uint32 y) const;
+			bool				HasHint(uint32 x, uint32 y, uint32 value) const;
 
 			void				SetValidMaskAt(uint32 x, uint32 y,
 									uint32 validMask);
 			uint32				ValidMaskAt(uint32 x, uint32 y) const;
+			bool				IsValid(uint32 x, uint32 y, uint32 value) const;
 
 			void				SetFlagsAt(uint32 x, uint32 y, uint32 flags);
 			uint32				FlagsAt(uint32 x, uint32 y) const;
+			bool				IsInitialValue(uint32 x, uint32 y) const;
 
 			void				SetValueAt(uint32 x, uint32 y, uint32 value,
 									bool setSolved = false);