c-ipfs/importer/importer.c

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2016-12-12 11:27:06 +00:00
#include <stdio.h>
#include "ipfs/importer/importer.h"
#define MAX_DATA_SIZE 262144 // 1024 * 256;
/**
* read the next chunk of bytes, create a node, and add a link to the node in the passed-in node
* @param file the file handle
* @param node the node to add to
* @returns number of bytes read
*/
int ipfs_import_chunk(FILE* file, struct Node* node) {
unsigned char buffer[MAX_DATA_SIZE];
size_t bytes_read = fread(buffer, MAX_DATA_SIZE, 1, file);
if (node->data_size == 0) {
Node_Set_Data(node, buffer, bytes_read);
} else {
// create a new node, and link to the parent
struct Node* new_node = N_Create_From_Data(buffer, bytes_read);
// persist
// put link in node
Node_Add_Link(node, Create_Link("", new_node->cached->hash));
Node_Delete(new_node);
}
return bytes_read;
}
/**
* Creates a node based on an incoming file
* @param file_name the file to import
* @param node the root node (could have links to others)
* @returns true(1) on success
*/
int ipfs_import_file(const char* fileName, struct Node** node) {
int retVal = 1;
FILE* file = fopen(fileName, "rb");
*node = (struct Node)malloc(sizeof(struct Node));
// add all nodes
while (ipfs_import_chunk(file, *node) == MAX_DATA_SIZE) {}
fclose(file);
return 1;
}