lib.h

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#ifndef MUTT_STORE_LIB_H
#define MUTT_STORE_LIB_H
 
#include <stdbool.h>
#include <stdlib.h>

typedef void StoreHandle;

struct StoreOps
{
  const char *name; 

  StoreHandle *(*open)(const char *path, bool create);

  void *(*fetch)(StoreHandle *store, const char *key, size_t klen, size_t *vlen);

  void (*free)(StoreHandle *store, void **ptr);

  int (*store)(StoreHandle *store, const char *key, size_t klen, void *value, size_t vlen);

  int (*delete_record)(StoreHandle *store, const char *key, size_t klen);

  void (*close)(StoreHandle **ptr);

  const char *(*version)(void);
};
 
struct Slist *         store_backend_list(void);
const struct StoreOps *store_get_backend_ops(const char *str);
bool                   store_is_valid_backend(const char *str);
 
#define STORE_BACKEND_OPS(_name)                                               \
  const struct StoreOps store_##_name##_ops = {                                \
    .name           = #_name,                                                  \
    .open           = store_##_name##_open,                                    \
    .fetch          = store_##_name##_fetch,                                   \
    .free           = store_##_name##_free,                                    \
    .store          = store_##_name##_store,                                   \
    .delete_record  = store_##_name##_delete_record,                           \
    .close          = store_##_name##_close,                                   \
    .version        = store_##_name##_version,                                 \
  };
 
#endif /* MUTT_STORE_LIB_H */