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#include <stdio.h>
#include <string.h>
#include "cell.h"
#include "display.h"
void update_not_row_col(struct cell b[9][9])
{
int x = 0;
int y = 0;
int i = 0;
int val = 0;
for (y = 0; y < 9; y++)
{
for (x = 0; x < 9; x++)
{
val = b[x][y].val;
if (val != 0)
{
for (i = 0; i < 9; i++)
{
b[i][y].not[val - 1] = 1;
b[x][i].not[val - 1] = 1;
}
}
}
}
}
void not_to_val_row_col(struct cell b[9][9])
{
int x = 0;
int y = 0;
int i = 0;
int val = 0;
int total = 0;
for (y = 0; y < 9; y++)
{
total = 0;
for (x = 0; x < 9; x++)
{
if (b[x][y].val != 0)
continue;
for (i = 0; i < 9; i++)
{
if (b[x][y].not[i])
{
total++;
} else {
val = i + 1;
}
}
if (total == 8)
b[x][y].val = val;
}
}
}
void not_to_val_cell(struct cell b[9][9])
{
int cx = 0;
int cy = 0;
int x = 0;
int y = 0;
int n = 0;
int potentials = 0;
int okx, oky;
struct cell c;
/* refactor this crap */
for (cy = 0; cy < 9; cy += 3)
{
for (cx = 0; cx < 9; cx += 3)
{
/* for each val that has to be in cell */
for (n = 1; n <= 9; n++)
{
for (y = 0; y < 3; y++)
{
for (x = 0; x < 3; x++)
{
c = b[cx+x][cy+y];
if (c.val == n)
{
potentials = 0;
y = 3;
break;
}
if (c.val)
continue;
if (c.not[n-1] == 0)
{
potentials++;
okx = x;
oky = y;
}
}
}
if (potentials == 1)
{
b[cx+okx][cy+oky].val = n;
potentials = 0;
}
}
}
}
}
int main(int argc, char **argv)
{
// int x = 0;
// int y = 0;
struct cell board[9][9];
memset(board, 0, sizeof(board));
board[7][0].val = 3;
board[4][1].val = 3;
board[0][7].val = 3;
board[1][4].val = 3;
/* dummy board taken from the guardian lol */
/* FIXME: have a way to input boards, silly */
board[0][0].val = 7;
board[0][4].val = 5;
board[1][2].val = 5;
board[1][4].val = 9;
board[2][1].val = 6;
board[2][2].val = 4;
board[2][5].val = 2;
board[3][0].val = 1;
board[3][5].val = 9;
board[3][6].val = 7;
board[4][0].val = 9;
board[4][2].val = 6;
board[4][3].val = 4;
board[4][7].val = 8;
board[4][8].val = 5;
board[5][4].val = 2;
board[6][4].val = 8;
board[6][6].val = 5;
board[6][7].val = 6;
board[7][1].val = 8;
board[7][6].val = 3;
board[8][0].val = 4;
board[8][4].val = 1;
board[8][5].val = 7;
board[8][8].val = 8;
display(board);
update_not_row_col(board);
not_to_val_cell(board);
not_to_val_row_col(board);
display(board);
}
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