65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
#include <stdio.h>
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#include "ipfs/importer/importer.h"
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#include "ipfs/merkledag/merkledag.h"
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#define MAX_DATA_SIZE 262144 // 1024 * 256;
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/***
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* Imports OS files into the datastore
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*/
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/**
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* read the next chunk of bytes, create a node, and add a link to the node in the passed-in node
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* @param file the file handle
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* @param node the node to add to
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* @returns number of bytes read
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*/
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size_t ipfs_import_chunk(FILE* file, struct Node* node, struct FSRepo* fs_repo) {
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unsigned char buffer[MAX_DATA_SIZE];
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size_t bytes_read = fread(buffer, 1, MAX_DATA_SIZE, file);
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if (node->data_size == 0) {
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ipfs_node_set_data(node, buffer, bytes_read);
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} else {
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// create a new node, and link to the parent
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struct Node* new_node = NULL;
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ipfs_node_new_from_data(buffer, bytes_read, &new_node);
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// persist
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ipfs_merkledag_add(new_node, fs_repo);
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// put link in parent node
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struct NodeLink* new_link = NULL;
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ipfs_node_link_new("", new_node->cached->hash, new_node->cached->hash_length, &new_link);
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ipfs_node_add_link(node, new_link);
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ipfs_node_free(new_node);
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}
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if (bytes_read != MAX_DATA_SIZE) {
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// persist the main node
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ipfs_merkledag_add(node, fs_repo);
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}
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return bytes_read;
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}
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/**
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* Creates a node based on an incoming file
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* @param file_name the file to import
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* @param node the root node (could have links to others)
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* @returns true(1) on success
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*/
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int ipfs_import_file(const char* fileName, struct Node** node, struct FSRepo* fs_repo) {
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int retVal = 1;
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int bytes_read = MAX_DATA_SIZE;
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FILE* file = fopen(fileName, "rb");
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retVal = ipfs_node_new(node);
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if (retVal == 0)
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return 0;
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// add all nodes
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while ( bytes_read == MAX_DATA_SIZE) {
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bytes_read = ipfs_import_chunk(file, *node, fs_repo);
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}
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fclose(file);
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return 1;
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}
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