+uint16_t read_uint16_bigendian(FILE * file) {
+// Read uint16 from file in big-endian order.
+ const uint16_t nchar = UCHAR_MAX + 1;
+ unsigned char a = fgetc(file);
+ unsigned char b = fgetc(file);
+ return (a * nchar) + b; }
+
+void write_uint16_bigendian(uint16_t x, FILE * file) {
+// Write uint16 to file in beg-endian order.
+ const uint16_t nchar = UCHAR_MAX + 1;
+ unsigned char a = x / nchar;
+ unsigned char b = x % nchar;
+ fputc(a, file);
+ fputc(b, file); }
+
+uint32_t read_uint32_bigendian(FILE * file) {
+// Read uint32 from file in big-endian order.
+ const uint16_t nchar = UCHAR_MAX + 1;
+ unsigned char a = fgetc(file);
+ unsigned char b = fgetc(file);
+ unsigned char c = fgetc(file);
+ unsigned char d = fgetc(file);
+ return (a * nchar * nchar * nchar) + (b * nchar * nchar) + (c * nchar) + d; }
+
+void write_uint32_bigendian(uint32_t x, FILE * file) {
+// Write uint32 to file in beg-endian order.
+ const uint16_t nchar = UCHAR_MAX + 1;
+ unsigned char a = x / (nchar * nchar * nchar);
+ unsigned char b = (x - (a * nchar * nchar * nchar)) / (nchar * nchar);
+ unsigned char c = (x - ((a * nchar * nchar * nchar) + (b * nchar * nchar))) / nchar;
+ unsigned char d = x % nchar;
+ fputc(a, file);
+ fputc(b, file);
+ fputc(c, file);
+ fputc(d, file); }
+
+void load_seed(struct World * world) {
+// Load seed integer from seed file.
+ FILE * file = fopen("savefile", "r");
+ world->seed = read_uint32_bigendian(file);
+ world->turn = read_uint32_bigendian(file);
+ world->player->y = read_uint16_bigendian(file);
+ world->player->x = read_uint16_bigendian(file);
+ world->monster->y = read_uint16_bigendian(file);
+ world->monster->x = read_uint16_bigendian(file);
+ fclose(file); }
+
+void save_seed(struct World * world) {
+// Save seed integer to seed file.
+ FILE * file = fopen("savefile", "w");
+ write_uint32_bigendian(world->seed, file);
+ write_uint32_bigendian(world->turn, file);
+ write_uint16_bigendian(world->player->y, file);
+ write_uint16_bigendian(world->player->x, file);
+ write_uint16_bigendian(world->monster->y, file);
+ write_uint16_bigendian(world->monster->x, file);
+ fclose(file); }
+