/* storage.h - C-ABI boundary between Storage Engine (C) and Engine Logic (C++) */
#ifndef PAULDB_STORAGE_H
#define PAULDB_STORAGE_H

#include <stdint.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C"
{



#endif

/* --- Page Management --- */
typedef struct Page Page;

Page *
page_create
(
	uint32_t page_id
);

int
page_insert
(
	Page *p,
	const void *data,
	size_t len
);

void *
page_get
(
	Page *p,
	uint16_t slot_id,
	size_t *out_len
);

void
page_free
(
	Page *p
);

/* --- Heap (Multi-Page Row Store / Delta) --- */
typedef struct Heap Heap;

Heap *
heap_create
(
	void
);

int
heap_insert
(
	Heap *h,
	const void *data,
	size_t len
);

void
heap_full_scan
(
	Heap *h,
	void (*callback)
	(
		const void *,
		size_t
	)
);

void
heap_free
(
	Heap *h
);

/* --- B+Tree Index --- */
typedef struct BTree BTree;

BTree *
btree_create
(
	void
);

int
btree_insert
(
	BTree *bt,
	int64_t key,
	uint32_t page_id,
	uint16_t slot_id
);

int
btree_lookup
(
	BTree *bt,
	int64_t key,
	uint32_t *out_page,
	uint16_t *out_slot
);

void
btree_free
(
	BTree *bt
);

#ifdef __cplusplus
}
#endif

#endif /* PAULDB_STORAGE_H */