c-ipfs/include/ipfs/blocks/blockstore.h

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/***
* a thin wrapper over a datastore for getting and putting block objects
*/
#ifndef __IPFS_BLOCKS_BLOCKSTORE_H__
#define __IPFS_BLOCKS_BLOCKSTORE_H__
#include "ipfs/cid/cid.h"
#include "ipfs/repo/fsrepo/fs_repo.h"
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struct BlockstoreContext {
const struct FSRepo* fs_repo;
};
struct Blockstore {
struct BlockstoreContext* blockstoreContext;
int (*Delete)(const struct BlockstoreContext* context, struct Cid* cid);
int (*Has)(const struct BlockstoreContext* context, struct Cid* cid);
/**
* Retrieve a block from the blockstore
*/
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int (*Get)(const struct BlockstoreContext* context, struct Cid* cid, struct Block** block);
int (*Put)(const struct BlockstoreContext* context, struct Block* block, size_t* bytes_written);
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};
/***
* Create a new Blockstore struct
* @param fs_repo the FSRepo to use
* @returns the new Blockstore struct, or NULL if there was a problem.
*/
struct Blockstore* ipfs_blockstore_new(const struct FSRepo* fs_repo);
/**
* Release resources of a Blockstore struct
* @param blockstore the struct to free
* @returns true(1)
*/
int ipfs_blockstore_free(struct Blockstore* blockstore);
/**
* Delete a block based on its Cid
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* @param context the context
* @param cid the Cid to look for
* @param returns true(1) on success
*/
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int ipfs_blockstore_delete(const struct BlockstoreContext* context, struct Cid* cid);
/***
* Determine if the Cid can be found
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* @param context the context
* @param cid the Cid to look for
* @returns true(1) if found
*/
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int ipfs_blockstore_has(const struct BlockstoreContext* context, struct Cid* cid);
/***
* Find a block based on its Cid
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* @param context the context
* @param cid the Cid to look for
* @param block where to put the data to be returned
* @returns true(1) on success
*/
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int ipfs_blockstore_get(const struct BlockstoreContext* context, struct Cid* cid, struct Block** block);
/***
* Put a block in the blockstore
* @param block the block to store
* @returns true(1) on success
*/
int ipfs_blockstore_put(const struct BlockstoreContext* context, struct Block* block, size_t* bytes_written);
/***
* Put a struct UnixFS in the blockstore
* @param unix_fs the structure
* @param fs_repo the repo to place the strucure in
* @param bytes_written the number of bytes written to the blockstore
* @returns true(1) on success
*/
int ipfs_blockstore_put_unixfs(const struct UnixFS* unix_fs, const struct FSRepo* fs_repo, size_t* bytes_written);
/***
* Find a UnixFS struct based on its hash
* @param hash the hash to look for
* @param hash_length the length of the hash
* @param unix_fs the struct to fill
* @param fs_repo where to look for the data
* @returns true(1) on success
*/
int ipfs_blockstore_get_unixfs(const unsigned char* hash, size_t hash_length, struct UnixFS** block, const struct FSRepo* fs_repo);
/**
* Put a struct Node in the blockstore
*/
int ipfs_blockstore_put_node(const struct HashtableNode* node, const struct FSRepo* fs_repo, size_t* bytes_written);
int ipfs_blockstore_get_node(const unsigned char* hash, size_t hash_length, struct HashtableNode** node, const struct FSRepo* fs_repo);
#endif