c-ipfs/blocks/block.c
John Jones b462d9ef53 More storage implementation
Successfully writing to lightningdb. Now to pull it back out. Also need
to write to the blockstore.
2016-11-30 11:46:41 -05:00

62 lines
1.4 KiB
C

/**
* The implementation of methods around IPFS blocks
*/
#include <stdlib.h>
#include <string.h>
#include "libp2p/crypto/sha256.h"
#include "ipfs/blocks/block.h"
#include "ipfs/cid/cid.h"
/***
* Create a new block based on the incoming data
* @param data the data to base the block on
* @param data_size the length of the data array
* @param block a pointer to the struct Block that will be created
* @returns true(1) on success
*/
int ipfs_blocks_block_new(const unsigned char* data, size_t data_size, struct Block** block) {
// allocate memory for structure
(*block) = (struct Block*)malloc(sizeof(struct Block));
if ((*block) == NULL)
return 0;
// cid
unsigned char hash[32];
if (libp2p_crypto_hashing_sha256(data, data_size, &hash[0]) == 0) {
free(*block);
return 0;
}
if (ipfs_cid_new(0, hash, 32, CID_PROTOBUF, &((*block)->cid)) == 0) {
free(*block);
return 0;
}
(*block)->data_length = data_size;
(*block)->data = malloc(sizeof(unsigned char) * data_size);
if ( (*block)->data == NULL) {
ipfs_cid_free((*block)->cid);
free(*block);
return 0;
}
memcpy( (*block)->data, data, data_size);
return 1;
}
/***
* Free resources used by the creation of a block
* @param block the block to free
* @returns true(1) on success
*/
int ipfs_blocks_block_free(struct Block* block) {
ipfs_cid_free(block->cid);
if (block->data != NULL)
free(block->data);
free(block);
return 1;
}