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#include "sudoku.hh"
bool Grid::verbose = false;
bool Grid::advprint = false;
{
int val;
std::fstream fs;
assert(filename);
if (Grid::verbose)
std::cout << "Loading file: " << filename << "..." << std::endl;
fs.open(filename, std::fstream::in);
if (!fs) {
Error e("Unable to open file: ", EXIT_LOADFAIL);
e << filename;
throw e;
}
try {
for (int y = 0; y < GRID_SIDE; ++y)
for (int x = 0; x < GRID_SIDE; ++x) {
fs >> std::dec >> val;
if (val < 0 || val > 9) {
Error e;
e << "Invalid value: " << val << " in file: " << filename;
throw e;
}
if (val > 0)
pose(x, y, val);
}
catch (Error &e) {
e.code(EXIT_LOADFAIL);
e >> "'.\nReason: " >> filename >> "Load fail in file: '";
e << "\nYour grid is incorrect!";
fs.close();
throw;
}
e << "Invalid position: " << x + 1 << ", " << y + 1;
e.code(EXIT_INV_POS);
throw e;
catch (const Error &er) {
e << "Unable to pose " << v << " in (" << x + 1 << "," << y + 1 << "): "
<< er.message();
e.code(er.code());
throw e;
catch (Error &e) {
e << " During seting case (" << x + 1 << "," << y + 1 << "), unable to forbid "
<< v << " in (" << x + 1 << "," << i + 1 << ").";
throw e;
catch (Error &e) {
e << " During seting case (" << x + 1 << "," << y + 1 << "), unable to forbid "
<< v << " in (" << i + 1 << "," << y + 1 << ").";
throw e;
for (int j = 0; j < 3; ++j) {
int a = (x / 3) * 3 + i;
int b = (y / 3) * 3 + j;
try {
if (!(x == a && y == b))
block_[a][b].forbid(v);
}
catch (Error &e) {
e << " During seting case (" << x + 1 << "," << y + 1 << "), unable to forbid "
<< v << " in (" << a + 1 << "," << b + 1 << ").";
throw e;
if (Grid::verbose)
std::cout << "Resolving..." << std::endl;
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posed += solve_complete_block();
posed += solve_square();
posed += solve_line();
}
while (posed > 0);
}
int Grid::solve_complete_block()
{
int posed = 0;
for (int y = 0; y < GRID_SIDE; ++y)
for (int x = 0; x < GRID_SIDE; ++x) {
if (block_[x][y].is_set())
continue;
int count = 0, lastval;
for (int i = 1; i <= GRID_SIDE; ++i)
if (!block_[x][y].is_forbidden(i)) {
++count;
lastval = i;
}
if (count == 1) {
pose(x, y, lastval);
if (Grid::verbose)
std::cout << "Seting " << lastval << " to " << x << ","<< y << std::endl;
++posed;
}
}
return posed;
}
int Grid::solve_square()
{
int posed = 0;
for (int v = 1; v <= GRID_SIDE; ++v)
for (int i = 0; i < GRID_SIDE; i += 3)
for (int j = 0; j < GRID_SIDE; j += 3) {
int v_count = 0;
int x,y;
for (int k = i; k < 3; ++k)
for (int l = j; l < 3; ++l)
if (!block_[k][l].is_forbidden(v)) {
x = k;
y = l;
++v_count;
}
if (v_count == 1) {
std::cerr << "found " << v << " with solve_square in (" << x + 1
<< "," << y + 1 << ")\n";
pose(x, y, v);
++posed;
}
}
return posed;
}
int Grid::solve_line()
{
int posed = 0;
for (int v = 1; v <= GRID_SIDE; ++v) //each val
for (int i = 0; i < GRID_SIDE; ++i) { //each line and column
int horizontal_count = 0, horizontal_x, horizontal_y;
int vertical_count = 0, vertical_x, vertical_y;
for (int j = 0; j < GRID_SIDE; ++j) {
if (!block_[i][j].is_forbidden(v)) {
horizontal_x = i;
horizontal_y = j;
++horizontal_count;
}
if (!block_[j][i].is_forbidden(v)) {
vertical_x = j;
vertical_y = i;
++vertical_count;
}
if (horizontal_count == 1) {
std::cerr << "found " << v << " with solve_line_h in ("
<< horizontal_x + 1
<< "," << horizontal_y + 1 << ")" << std::endl;
pose(horizontal_x, horizontal_y, v);
++posed;
}
if (vertical_count == 1) {
if (!(horizontal_x == vertical_x && horizontal_y == vertical_y)) {
std::cerr << "found " << v << " with solve_line_v in ("
<< vertical_x + 1
<< "," << vertical_y + 1 << ")" << std::endl;
pose(vertical_x, vertical_y, v);
for (int i = 0; i < 3; ++i) {
for (x = 0; x < GRID_SIDE; ++x) {
if (x > 0 && x % 3 == 0)
std::cout << "\033[0;32m" << j << "\033[0m";
else if (block_[x][y].is_forbidden(j))
std::cout << "\033[0;31m" << j << "\033[0m";
}
std::cout << "|" << std::endl;
}
}
else {
std::cout << "|";
for (x = 0; x < GRID_SIDE; ++x) {
if (x > 0 && x % 3 == 0) std::cout << " |";
std::cout << " " << block_[x][y] << " |";
}
std::cout << std::endl;
}
}
print_line();
}
{
bool vertical_line[GRID_SIDE];
bool horizontal_line[GRID_SIDE];
int tmp;
// check horizontals and verticales
for (int i = 0; i < GRID_SIDE; ++i) {
for (int j = 0; j < GRID_SIDE; ++j)
horizontal_line[j] = vertical_line[j] = false;
for (int j = 0; j < GRID_SIDE; ++j) {
//check for empty block
if (tmp == - 1) {
info << "Grid is incomplete.";
return false;
}
//check for crazy digits
if (tmp < 0 || tmp > GRID_SIDE) {
info << "Bad value " << tmp << " in (" << i + 1 << "," << j + 1
<< ")." << std::endl;
return false;
}
//check for more than one digit un line
if (horizontal_line[tmp]) {
info << tmp << " is already set in line " << i << ".";
//check for empty block
if (tmp == - 1) {
info << "Grid is incomplete.";
return false;
}
//check for crazy digits
if (tmp < 0 || tmp > GRID_SIDE) {
info << "Bad value " << tmp << " in (" << j + 1 << "," << i + 1
<< ")." << std::endl;
}
//check for more than one digit un line
if (vertical_line[tmp]) {
info << tmp << " is already set in column " << i << ".";
return false;
}
if (!vertical_line[j]) {
info << "Vertical line " << j + 1 << " is not full.";
return false;
}
else if (!horizontal_line[j]) {
info << "Horizontal line " << j + 1 << "is not full.";
}
// check nine blocks (use vertical_block)
for (int i = 0; i < GRID_SIDE; i += 3)
for (int j = 0; j < GRID_SIDE; j += 3) {
for (int k = 0; k < GRID_SIDE; ++k)
vertical_line[k] = false;
assert(tmp >= 0 && tmp < GRID_SIDE);
if (vertical_line[tmp] == true)
for (int j = 0; j < GRID_SIDE; ++j)
if (!vertical_line[j])
return false;
return true;