mirror of
https://review.haiku-os.org/haiku
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7bd1d755c4
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22062 a95241bf-73f2-0310-859d-f6bbb57e9c96
421 lines
7.4 KiB
C++
421 lines
7.4 KiB
C++
/*
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* Copyright 2007, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#include "SudokuField.h"
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#include <new>
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#include <stdio.h>
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#include <string.h>
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#include <Message.h>
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#include <OS.h>
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const char*
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mask(uint32 set)
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{
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static char text[64];
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uint32 i = 0;
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for (int32 number = 9; number > 0; number--) {
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text[i++] = set & (1UL << (number - 1)) ? number + '0' : '-';
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}
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text[i] = '\0';
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return text;
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}
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// #pragma mark -
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SudokuField::field::field()
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:
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hint_mask(0),
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valid_mask(~0),
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flags(0),
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value(0)
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{
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}
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// #pragma mark -
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SudokuField::SudokuField(uint32 size)
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:
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fSize(size * size),
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fBlockSize(size)
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{
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fFields = new (std::nothrow) field[fSize * fSize];
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fMaxMask = (1UL << fSize) - 1;
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}
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SudokuField::SudokuField(const BMessage* archive)
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{
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if (archive->FindInt32("block size", (int32*)&fBlockSize) != B_OK)
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return;
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fSize = fBlockSize * fBlockSize;
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fMaxMask = (1UL << fSize) - 1;
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uint32 count = fSize * fSize;
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fFields = new (std::nothrow) field[count];
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if (fFields == NULL)
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return;
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for (uint32 i = 0; i < count; i++) {
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struct field& field = fFields[i];
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if (archive->FindInt32("value", i, (int32*)&field.value) != B_OK
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|| archive->FindInt32("valid mask", i,
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(int32*)&field.valid_mask) != B_OK
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|| archive->FindInt32("hint mask", i,
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(int32*)&field.hint_mask) != B_OK
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|| archive->FindInt32("flags", i, (int32*)&field.flags) != B_OK)
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break;
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}
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}
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SudokuField::SudokuField(const SudokuField& other)
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: BArchivable(other)
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{
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fSize = other.fSize;
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fBlockSize = other.fBlockSize;
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fMaxMask = other.fMaxMask;
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fFields = new (std::nothrow) field[fSize * fSize];
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if (fFields != NULL)
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memcpy(fFields, other.fFields, sizeof(field) * fSize * fSize);
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}
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SudokuField::~SudokuField()
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{
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delete[] fFields;
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}
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status_t
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SudokuField::InitCheck()
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{
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if (fBlockSize == 0)
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return B_BAD_VALUE;
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return fFields == NULL ? B_NO_MEMORY : B_OK;
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}
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status_t
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SudokuField::Archive(BMessage* archive, bool deep) const
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{
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status_t status = BArchivable::Archive(archive, deep);
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if (status == B_OK)
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archive->AddInt32("block size", fBlockSize);
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if (status < B_OK)
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return status;
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uint32 count = fSize * fSize;
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for (uint32 i = 0; i < count && status == B_OK; i++) {
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struct field& field = fFields[i];
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status = archive->AddInt32("value", field.value);
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if (status == B_OK)
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status = archive->AddInt32("valid mask", field.valid_mask);
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if (status == B_OK)
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status = archive->AddInt32("hint mask", field.hint_mask);
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if (status == B_OK)
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status = archive->AddInt32("flags", field.flags);
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}
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return status;
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}
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/*static*/ SudokuField*
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SudokuField::Instantiate(BMessage* archive)
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{
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if (!validate_instantiation(archive, "SudokuField"))
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return NULL;
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return new SudokuField(archive);
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}
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void
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SudokuField::Reset()
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{
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for (uint32 y = 0; y < fSize; y++) {
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for (uint32 x = 0; x < fSize; x++) {
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struct field& field = _FieldAt(x, y);
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field.value = 0;
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field.flags = 0;
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field.hint_mask = 0;
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field.valid_mask = fMaxMask;
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}
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}
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}
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status_t
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SudokuField::SetTo(char base, const char* data)
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{
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if (data != NULL && strlen(data) < fSize * fSize)
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return B_BAD_VALUE;
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Reset();
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if (data == NULL)
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return B_OK;
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uint32 i = 0;
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for (uint32 y = 0; y < fSize; y++) {
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for (uint32 x = 0; x < fSize; x++) {
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uint32 value = data[i++] - base;
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if (value) {
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struct field& field = _FieldAt(x, y);
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field.value = value;
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field.flags = kInitialValue;
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}
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}
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}
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for (uint32 y = 0; y < fSize; y++) {
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for (uint32 x = 0; x < fSize; x++) {
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_ComputeValidMask(x, y, false);
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}
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}
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return B_OK;
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}
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void
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SudokuField::SetTo(const SudokuField* field)
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{
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if (field == NULL) {
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Reset();
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return;
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}
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for (uint32 y = 0; y < fSize; y++) {
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for (uint32 x = 0; x < fSize; x++) {
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_FieldAt(x, y) = field->_FieldAt(x, y);
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}
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}
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}
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void
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SudokuField::Dump()
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{
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for (uint32 y = 0; y < fSize; y++) {
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for (uint32 x = 0; x < fSize; x++) {
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if (x != 0 && x % fBlockSize == 0)
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putchar(' ');
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printf("%lu", ValueAt(x, y));
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}
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putchar('\n');
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}
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}
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bool
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SudokuField::IsSolved()
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{
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for (uint32 y = 0; y < fSize; y++) {
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for (uint32 x = 0; x < fSize; x++) {
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if (!_ValidValueAt(x, y))
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return false;
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}
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}
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return true;
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}
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void
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SudokuField::SetHintMaskAt(uint32 x, uint32 y, uint32 hintMask)
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{
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_FieldAt(x, y).hint_mask = hintMask;
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}
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uint32
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SudokuField::HintMaskAt(uint32 x, uint32 y) const
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{
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return _FieldAt(x, y).hint_mask;
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}
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void
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SudokuField::SetValidMaskAt(uint32 x, uint32 y, uint32 validMask)
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{
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_FieldAt(x, y).valid_mask = validMask & fMaxMask;
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}
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uint32
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SudokuField::ValidMaskAt(uint32 x, uint32 y) const
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{
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return _FieldAt(x, y).valid_mask;
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}
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void
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SudokuField::SetFlagsAt(uint32 x, uint32 y, uint32 flags)
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{
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_FieldAt(x, y).flags = flags;
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}
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uint32
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SudokuField::FlagsAt(uint32 x, uint32 y) const
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{
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return _FieldAt(x, y).flags;
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}
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void
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SudokuField::SetValueAt(uint32 x, uint32 y, uint32 value, bool setSolved)
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{
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_FieldAt(x, y).value = value;
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_FieldAt(x, y).hint_mask = 0;
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_UpdateValidMaskChanged(x, y, setSolved);
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}
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uint32
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SudokuField::ValueAt(uint32 x, uint32 y) const
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{
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return _FieldAt(x, y).value;
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}
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bool
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SudokuField::_ValidValueAt(uint32 x, uint32 y) const
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{
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uint32 value = _FieldAt(x, y).value;
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if (!value)
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return false;
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value = 1UL << (value - 1);
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return (_FieldAt(x, y).valid_mask & value) != 0;
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}
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void
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SudokuField::_ComputeValidMask(uint32 x, uint32 y, bool setSolved)
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{
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if (ValueAt(x, y))
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return;
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// check row
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uint32 foundMask = 0;
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for (uint32 i = 0; i < fSize; i++) {
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uint32 value = ValueAt(i, y);
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if (value && _ValidValueAt(i, y))
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foundMask |= 1UL << (value - 1);
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}
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// check column
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for (uint32 i = 0; i < fSize; i++) {
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uint32 value = ValueAt(x, i);
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if (value && _ValidValueAt(x, i))
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foundMask |= 1UL << (value - 1);
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}
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// check block
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uint32 offsetX = x / fBlockSize * fBlockSize;
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uint32 offsetY = y / fBlockSize * fBlockSize;
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for (uint32 partY = 0; partY < fBlockSize; partY++) {
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for (uint32 partX = 0; partX < fBlockSize; partX++) {
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uint32 value = ValueAt(partX + offsetX, partY + offsetY);
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if (value && _ValidValueAt(partX + offsetX, partY + offsetY))
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foundMask |= 1UL << (value - 1);
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}
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}
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SetValidMaskAt(x, y, ~foundMask);
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if (setSolved) {
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// find the one set bit, if not more
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uint32 value = 0;
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for (uint32 i = 0; i < fSize; i++) {
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if ((foundMask & (1UL << i)) == 0) {
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if (value != 0) {
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value = 0;
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break;
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}
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value = i + 1;
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}
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}
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if (value != 0)
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SetValueAt(x, y, value, true);
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}
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}
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void
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SudokuField::_UpdateValidMaskChanged(uint32 x, uint32 y, bool setSolved)
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{
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// update row
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for (uint32 i = 0; i < fSize; i++) {
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_ComputeValidMask(i, y, setSolved);
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}
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// update column
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for (uint32 i = 0; i < fSize; i++) {
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if (i == y)
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continue;
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_ComputeValidMask(x, i, setSolved);
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}
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// update block
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uint32 offsetX = x / fBlockSize * fBlockSize;
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uint32 offsetY = y / fBlockSize * fBlockSize;
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for (uint32 partY = 0; partY < fBlockSize; partY++) {
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for (uint32 partX = 0; partX < fBlockSize; partX++) {
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if (partX + offsetX == x || partY + offsetY == y)
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continue;
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_ComputeValidMask(partX + offsetX, partY + offsetY, setSolved);
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}
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}
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}
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const SudokuField::field&
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SudokuField::_FieldAt(uint32 x, uint32 y) const
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{
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if (x >= fSize || y >= fSize)
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debugger("field outside bounds");
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return fFields[x + y * fSize];
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}
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SudokuField::field&
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SudokuField::_FieldAt(uint32 x, uint32 y)
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{
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if (x >= fSize || y >= fSize)
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debugger("field outside bounds");
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return fFields[x + y * fSize];
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}
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