#ifndef MEMORY_H
#define MEMORY_H

#include <stdlib.h>
#include <stdint.h>
#include <limits.h>
#include <stdbool.h>
#include <SDL3/SDL.h>

#ifndef PAGE_SIZE
#define PAGE_SIZE 4096
#endif

#ifndef PAGE_WIDTH
#define PAGE_WIDTH 256
#endif
#define PAGE_HEIGHT (PAGE_SIZE * CHAR_BIT / PAGE_WIDTH)

typedef struct page {
	struct page_list *l;
	uintptr_t address;
	SDL_Texture *tex;
	uint64_t hash;
	bool in_use;
	struct page *next;
} page;

typedef struct page_list {
	int fd;
	page *first;
} page_list;

uintptr_t to_addr(int x, int y);
void to_pos(uintptr_t addr, int *x, int *y);

int init_page_list(page_list *l, int fd);
page *get_page(page_list *l, uintptr_t addr);
void free_unused_pages(page_list *l);
SDL_Texture *get_texture(page *p);
void free_page_list(page_list *l);

void draw_line(page_list *l,
		double x1, double y1, double x2, double y2, bool bit);
#endif