c-ipfs/merkledag/merkledag.c
jmjatlanta da6490ac7f Implementation of MerkleDag get and put
Now saving and retrieving MerkleDags that contain data. Now need to work
with links and other types.
2016-12-05 17:23:58 -05:00

54 lines
1.4 KiB
C

/**
* A basic storage building block of the IPFS system
*/
#include "ipfs/merkledag/merkledag.h"
/***
* Adds a node to the dagService and blockService
* @param node the node to add
* @param cid the resultant cid that was added
* @returns true(1) on success
*/
int ipfs_merkledag_add(struct Node* node, struct FSRepo* fs_repo) {
// taken from merkledag.go line 59
// turn the node into a block
struct Block* block;
ipfs_blocks_block_new(node->data, node->data_size, &block);
int retVal = fs_repo->config->datastore->datastore_put_block(block, fs_repo->config->datastore);
if (retVal == 0) {
ipfs_blocks_block_free(block);
return 0;
}
Node_Set_Cid(node, block->cid);
ipfs_blocks_block_free(block);
// TODO: call HasBlock (unsure why as yet)
return 1;
}
/***
* Retrieves a node from the datastore based on the cid
* @param cid the key to look for
* @param node the node to be created
* @param fs_repo the repository
* @returns true(1) on success
*/
int ipfs_merkledag_get(const struct Cid* cid, struct Node** node, const struct FSRepo* fs_repo) {
int retVal = 1;
// look for the block
struct Block* block;
retVal = fs_repo->config->datastore->datastore_get_block(cid, &block, fs_repo->config->datastore);
if (retVal == 0)
return 0;
// we have the block. Fill the node
*node = N_Create_From_Data(block->data, block->data_length);
Node_Set_Cid(*node, cid);
return retVal;
}