--- /dev/null
+gol: gol.c array.c array.h
+ $(CC) -o gol gol.c array.c --std=gnu99 -lSDL2
--- /dev/null
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include "array.h"
+
+/*
+ * Implements a linear search.
+ */
+int gol_is_live(struct gol_board *const state, int_least32_t x, int_least32_t y)
+{
+ for (unsigned int i = 0; i < state->n; i += 2) {
+ if (state->live_cells[i] == x &&
+ state->live_cells[i+1] == y) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int gol_vivify(struct gol_board *const state, int_least32_t x, int_least32_t y)
+{
+ int_least32_t *tmp_cells = NULL;
+ size_t tmp_size = 0;
+ if (state->n == state->size) {
+ tmp_size = 2 * state->size;
+ tmp_cells = malloc(tmp_size * sizeof(typeof(tmp_cells)));
+ if (!tmp_cells) {
+ return 1;
+ }
+ memcpy(tmp_cells, state->live_cells,
+ tmp_size * sizeof(typeof(tmp_cells)));
+ state->size = tmp_size;
+ free(state->live_cells);
+ state->live_cells = tmp_cells;
+ }
+
+ state->live_cells[state->n] = x;
+ state->live_cells[state->n + 1] = y;
+
+ state->n += 2;
+ return 1;
+}
--- /dev/null
+#ifndef GOL_ARRAY_H
+#define GOL_ARRAY_H
+
+#include <stdint.h>
+
+
+/*
+ * Represents a state of the Game of Life. The coordinates of all live cells
+ * is stored in an array: [x1, y1, x2, y2, x3, y3,...]. N is the number of
+ * live cells, size is the size of the array.
+ */
+
+struct gol_board {
+ int_least32_t *live_cells;
+ uint_least32_t n;
+ uint_least32_t size;
+};
+
+/*
+ * Check that a cell located at (x,y) in the game board is live.
+ */
+int gol_is_live(struct gol_board *state, int_least32_t x, int_least32_t y);
+
+/*
+ * Append the coordinates of the live cell to the array.
+ */
+int gol_vivify(struct gol_board *state, int_least32_t x, int_least32_t y);
+
+#endif
--- /dev/null
+#include <SDL2/SDL.h>
+#include <stdio.h>
+#include "array.h"
+
+void quit(int e_st)
+{
+ SDL_Quit();
+ exit(e_st);
+}
+
+int main(int argc, char* args[])
+{
+ SDL_Window* window = NULL;
+ SDL_Surface* screen = NULL;
+
+ if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
+ quit(1);
+ }
+
+ //screen = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE);
+
+ window = SDL_CreateWindow("SDL Tutorial",
+ SDL_WINDOWPOS_UNDEFINED,
+ SDL_WINDOWPOS_UNDEFINED,
+ 640,
+ 320,
+ SDL_WINDOW_SHOWN);
+ if (!window) {
+ quit(1);
+ }
+
+ screen = SDL_GetWindowSurface(window);
+ if (!screen) {
+ quit(1);
+ }
+
+ SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF));
+ SDL_UpdateWindowSurface(window);
+
+ SDL_Delay(2000);
+
+ SDL_DestroyWindow(window);
+ quit(0);
+}
+
+