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Implemented ipfs_pin_has_child

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This commit is contained in:
Jose Marcial Vieira Bisneto 2017-01-05 19:01:24 -03:00
parent 4c330e29be
commit 6448a35a72
2 changed files with 39 additions and 0 deletions
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4
include/ipfs/pin/pin.h
View file

@ -40,4 +40,8 @@
// Return array index or -1 if fail.
PinMode ipfs_string_to_pin_mode (char *str);
int ipfs_pin_is_pinned (struct Pinned *p);
// Find out if the child is in the hash.
int ipfs_pin_has_child (struct FSRepo *ds,
unsigned char *hash, size_t hash_size,
unsigned char *child, size_t child_size);
#endif // IPFS_PIN_H

35
pin/pin.c
View file

@ -1,11 +1,14 @@
#include <stdlib.h>
#include <string.h>
#include "ipfs/repo/fsrepo/fs_repo.h"
#define IPFS_PIN_C
#include "ipfs/pin/pin.h"
#include "ipfs/cid/cid.h"
#include "ipfs/datastore/key.h"
#include "ipfs/merkledag/merkledag.h"
#include "ipfs/util/errs.h"
// package pin implements structures and methods to keep track of
@ -110,3 +113,35 @@ char *ipfs_pin_pinned_msg (struct Pinned *p)
}
return ret;
}
// Find out if the child is in the hash.
int ipfs_pin_has_child (struct FSRepo *ds,
unsigned char *hash, size_t hash_size,
unsigned char *child, size_t child_size)
{
struct Node *node;
struct NodeLink *node_link;
if (ipfs_merkledag_get (hash, hash_size, &node, ds)) {
if (node) {
if ((node->hash_size == child_size) &&
(memcmp (node->hash, child, child_size) == 0)) {
return 1;
}
// browse the node links.
for (node_link = node->head_link ; node_link ; node_link = node_link->next) {
if ((node_link->hash_size == child_size) &&
(memcmp (node_link->hash, child, child_size) != 0) &&
ipfs_pin_has_child (ds, node_link->hash, node_link->hash_size,
child, child_size)) {
return 1;
}
if ((node_link->hash_size == child_size) &&
(memcmp (node_link->hash, child, child_size) == 0)) {
return 1; // child is a child of the hash node.
}
}
}
}
return 0;
}