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