60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
#pragma once
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#include <stdint.h>
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/***
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* Interface to data storage
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*/
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enum DatastoreCursorOp { CURSOR_FIRST, CURSOR_NEXT };
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struct Datastore {
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char* type;
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char* path;
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char* storage_max;
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int storage_gc_watermark;
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char* gc_period;
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char* params;
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int no_sync;
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int hash_on_read;
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int bloom_filter_size;
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// function pointers for datastore operations
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int (*datastore_open)(int argc, char** argv, struct Datastore* datastore);
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int (*datastore_close)(struct Datastore* datastore);
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int (*datastore_put)(const unsigned char* key, size_t key_size, unsigned char* data, size_t data_length, const struct Datastore* datastore);
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int (*datastore_get)(const char* key, size_t key_size,
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unsigned char* data, size_t max_data_length, size_t* data_length,
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const struct Datastore* datastore);
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int (*datastore_cursor_open)(struct Datastore* datastore);
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int (*datastore_cursor_close)(struct Datastore* datastore);
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int (*datastore_cursor_get)(unsigned char** key, int* key_length, unsigned char** value, int* value_length, enum DatastoreCursorOp op, struct Datastore* datastore);
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// generic connection and status variables for the datastore
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void* handle; // a handle to the database
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void* cursor; // a current cursor
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};
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/***
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* Initialize the structure of the datastore to default settings. Used for
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* creating a new datastore on the disk.
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* @param datastore the struct to initialize
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* @param config_root the path to the root of IPFS
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* @returns true(1) on success
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*/
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int libp2p_datastore_init(struct Datastore* datastore, const char* config_root);
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/***
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* initialize the structure of the datastore
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* @param datastore the struct to initialize
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* @returns true(1) on success
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*/
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int libp2p_datastore_new(struct Datastore** datastore);
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/***
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* deallocate the memory and clear resources from a datastore_init
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* @param datastore the struct to deallocate
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* @returns true(1)
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*/
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int libp2p_datastore_free(struct Datastore* datastore);
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