#include "save.h"
#include "file.h"
#include "mapper.h"


static int make_sram_filename(char* sram_filename, int max_len,
                              const char* cart_filename) {
    return make_filename(  sram_filename, max_len,
                           basename(cart_filename),
                           "sram", "sram");
}

int load_sram(nes_cart* cart, const char* cart_filename) {
    int status = -1;

    int sram_size = cart->mapper->sram_size ?
            cart->mapper->sram_size(cart->mapper) : 0;
    void* sram = cart->mapper->sram ?
            cart->mapper->sram(cart->mapper) : NULL;

    if (sram_size > 0 && NULL != sram) {
        char sram_filename[FILENAME_MAX] = {0};
        make_sram_filename(sram_filename, FILENAME_MAX - 1,
                           cart_filename);
        status = read_file(sram_filename, sram, sram_size);
    }

    return status;
}

int save_sram(const nes_cart* cart, const char* cart_filename) {
    int status = -1;

    int sram_size = cart->mapper->sram_size ?
            cart->mapper->sram_size(cart->mapper) : 0;
    const void* sram = cart->mapper->sram ?
            cart->mapper->sram(cart->mapper) : NULL;

    if (sram_size > 0 && NULL != sram) {
        char sram_filename[FILENAME_MAX] = {0};
        make_sram_filename(sram_filename, FILENAME_MAX - 1,
                           cart_filename);
        status = write_file(sram_filename, sram, sram_size);
    }

    return status;
}