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Added helper method to compare ipfs address without IP address

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This commit is contained in:
jmjatlanta 2017-08-24 14:36:03 -05:00
parent c2f2c0c2da
commit 3b178a142d
2 changed files with 45 additions and 0 deletions
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14
include/multiaddr/multiaddr.h
View file

@ -87,6 +87,20 @@ int multiaddress_get_ip_port(const struct MultiAddress* in);
*/ */
char* multiaddress_get_peer_id(const struct MultiAddress* in); char* multiaddress_get_peer_id(const struct MultiAddress* in);
/**
* Check to see how these two addresses compare
* @param a side A
* @param b side B
* @returns <0 if B > A; >0 if A > B; 0 if A == B
*/
int multiaddress_compare(const struct MultiAddress* a, const struct MultiAddress* b); int multiaddress_compare(const struct MultiAddress* a, const struct MultiAddress* b);
/**
* Check to see how these two addresses compare, ignoring IP address, only looking at ID hash
* @param a side A
* @param b side B
* @returns <0 if B > A; >0 if A > B; 0 if A == B
*/
int multiaddress_compare_id(const struct MultiAddress* a, const struct MultiAddress* b);
#endif #endif

31
multiaddr.c
View file

@ -347,6 +347,12 @@ int multiaddress_decapsulate(struct MultiAddress * result, char * srci)
} }
} }
/**
* Check to see how these two addresses compare
* @param a side A
* @param b side B
* @returns <0 if B > A; >0 if A > B; 0 if A == B
*/
int multiaddress_compare(const struct MultiAddress* a, const struct MultiAddress* b) { int multiaddress_compare(const struct MultiAddress* a, const struct MultiAddress* b) {
if (a == NULL && b == NULL) if (a == NULL && b == NULL)
return 0; return 0;
@ -364,3 +370,28 @@ int multiaddress_compare(const struct MultiAddress* a, const struct MultiAddress
} }
return 0; return 0;
} }
/**
* Check to see how these two addresses compare, ignoring IP address,
* only looking at the first /ipfs/ID hash
* @param a side A
* @param b side B
* @returns <0 if B > A; >0 if A > B; 0 if A == B
*/
int multiaddress_compare_id(const struct MultiAddress* a, const struct MultiAddress* b) {
char* a_id = multiaddress_get_peer_id(a);
char* b_id = multiaddress_get_peer_id(b);
if (a_id == NULL && b_id == NULL)
return 0;
if (a_id == NULL && b_id != NULL)
return -1;
if (a_id != NULL && b_id == NULL)
return 1;
int retVal = strcmp(a_id, b_id);
if (a_id != NULL)
free(a_id);
if (b_id != NULL)
free(b_id);
return retVal;
}