tick.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include "tick.h"
   4
   5 int gol_tick(struct gol_board *state)
   6 {
   7         struct gol_board tmp_state;
   8         tmp_state = (struct gol_board ) {
   9                 .live_cells = malloc(10 * sizeof(typeof(*tmp_state.live_cells))),
  10                 .n = 0,
  11                 .size = 10,
  12                 .max_x = 0,
  13                 .min_x = 0,
  14                 .max_y = 0,
  15                 .min_y = 0
  16         };
  17         if (!tmp_state.live_cells) {
  18                 return 0;
  19         }
  20         unsigned char n_live_adj;
  21         for (int i = state->min_x; i < state->max_x; ++i) {
  22                 for (int j = state->min_y; j < state->max_y; ++j) {
  23                         n_live_adj = gol_is_live(state, i - 1, j - 1) +
  24                                 gol_is_live(state, i, j - 1) +
  25                                 gol_is_live(state, i + 1, j - 1) +
  26                                 gol_is_live(state, i - 1, j) +
  27                                 gol_is_live(state, i + 1, j) +
  28                                 gol_is_live(state, i - 1 , j + 1) +
  29                                 gol_is_live(state, i, j + 1) +
  30                                 gol_is_live(state, i + 1, j + 1);
  31
  32                         switch (n_live_adj) {
  33                         case (3):
  34                                 gol_vivify(&tmp_state, i, j);
  35                                 break;
  36                         case(2):
  37                                 if (gol_is_live(state, i, j)) {
  38                                         gol_vivify(&tmp_state, i, j);
  39                                 }
  40                         default:
  41                                 break;
  42                         }
  43
  44                 }
  45         }
  46         free(state->live_cells);
  47         *state = tmp_state;
  48         return 1;
  49 }