You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.2 KiB
46 lines
1.2 KiB
8 years ago
|
#ifndef OIDSET_H
|
||
|
|
#define OIDSET_H
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This API is similar to sha1-array, in that it maintains a set of object ids
|
||
|
|
* in a memory-efficient way. The major differences are:
|
||
|
|
*
|
||
|
|
* 1. It uses a hash, so we can do online duplicate removal, rather than
|
||
|
|
* sort-and-uniq at the end. This can reduce memory footprint if you have
|
||
|
|
* a large list of oids with many duplicates.
|
||
|
|
*
|
||
|
|
* 2. The per-unique-oid memory footprint is slightly higher due to hash
|
||
|
|
* table overhead.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A single oidset; should be zero-initialized (or use OIDSET_INIT).
|
||
|
|
*/
|
||
|
|
struct oidset {
|
||
|
|
struct hashmap map;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define OIDSET_INIT { { NULL } }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns true iff `set` contains `oid`.
|
||
|
|
*/
|
||
|
|
int oidset_contains(const struct oidset *set, const struct object_id *oid);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Insert the oid into the set; a copy is made, so "oid" does not need
|
||
|
|
* to persist after this function is called.
|
||
|
|
*
|
||
|
|
* Returns 1 if the oid was already in the set, 0 otherwise. This can be used
|
||
|
|
* to perform an efficient check-and-add.
|
||
|
|
*/
|
||
|
|
int oidset_insert(struct oidset *set, const struct object_id *oid);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Remove all entries from the oidset, freeing any resources associated with
|
||
|
|
* it.
|
||
|
|
*/
|
||
|
|
void oidset_clear(struct oidset *set);
|
||
|
|
|
||
|
|
#endif /* OIDSET_H */
|