#ifndef CACHE_H
#define CACHE_H

#include <sys/types.h>

/*
 * Configuration
 */

#define CACHE_NEST_COUNT 16
#define CACHE_KEY_SIZE 8

struct cache {
    struct cache_index {
        int     fd;
        struct cache_index_file *data;
        off_t   size;

    } index;

    struct cache_nest {
        int     fd;
        struct cache_nest_header *nest;
        off_t   size;

        struct cache_op *w_op;

    } nests[CACHE_NEST_COUNT];
    
    struct cache_op *wop_queue;
    struct cache_op *rop_list;
};

// system page size, initialized by cache_open
static long sys_pagesize;

// cache.c
void cache_close (struct cache *ctx);
int cache_open (struct cache *ctx, const char *cache_path);

// cache_index.c
int _cache_index_init (struct cache_index *ctx);
int _cache_index_find (struct cache_index *ctx, const u_int8_t key[CACHE_KEY_SIZE], u_int8_t *nest, u_int32_t *offset, u_int16_t *length);
int _cache_index_insert (struct cache_index *ctx, const u_int8_t key[CACHE_KEY_SIZE], const u_int8_t nest, const u_int32_t offset, const u_int16_t length);

#endif /* CACHE_H */