Flatten 2D Matrix

flatten_matrix.c

#include <stdio.h>
#include <stdlib.h>

#define BOARD_SIZE 64

typedef enum {
  COOL  = 1 << 0,
  GREAT = 1 << 1,
} op_type_e;

typedef struct piece_s {
  int type;
  int x, y;
} piece_t;

piece_t *board[BOARD_SIZE];

void init_board() {
  int x, y = 0;

  for (size_t i = 0; i < BOARD_SIZE; i++)
  {
    if (i % 8 == 0 && i > 0) {
      x = 0;
      y++;
    }

    board[i] = (piece_t*)calloc(sizeof(piece_t), 1);
    board[i]->type = 0;
    board[i]->x = x++;
    board[i]->y = y;
  }
}

void clear_board() {
  for (size_t i = 0; i < BOARD_SIZE; i++)   {
    board[i]->type = 0;
  }
}

void set_board_value(int value, int row, int col) {
  board[row * 8 + col]->type = value;
}

void move_left(int row, int col, int steps) {
  int v = board[row  * 8 + col]->type;
  board[row  * 8 + col]->type = 0;
  board[row * 8 + (col - steps)]->type = v;
}

void move_right(int row, int col, int steps) {
  int v = board[row * 8 + col]->type;
  board[row * 8 + col]->type = 0;
  board[row * 8 + (col + steps)]->type = v;
}

void print_board() {
  for (size_t i = 0; i < BOARD_SIZE; i++) {
    if (i % 8 == 0) {
      printf("\n");
    }

    printf("[%d](%d,%d)\t", board[i]->type, board[i]->x, board[i]->y);
  }
  printf("\n");
}

int main(int argc, char const *argv[])
{
  init_board();
  clear_board();
  set_board_value(123, 7,7);
  print_board();
  move_left(7,7, 2);
  print_board();
  move_right(7, 5, 1);
  print_board();
  return 0;
}