Imported Upstream version 2.22.3

[platform/upstream/git.git] / oidset.h

diff --git a/oidset.h b/oidset.h
index f4c9e0f..14f18f7 100644 (file)
--- a/oidset.h
+++ b/oidset.h
@@ -1,7 +1,8 @@
 #ifndef OIDSET_H
 #define OIDSET_H
 
-#include "oidmap.h"
+#include "hashmap.h"
+#include "khash.h"
 
 /**
  * This API is similar to sha1-array, in that it maintains a set of object ids
@@ -19,10 +20,19 @@
  * A single oidset; should be zero-initialized (or use OIDSET_INIT).
  */
 struct oidset {
-       struct oidmap map;
+       kh_oid_t set;
 };
 
-#define OIDSET_INIT { OIDMAP_INIT }
+#define OIDSET_INIT { { 0 } }
+
+
+/**
+ * Initialize the oidset structure `set`.
+ *
+ * If `initial_size` is bigger than 0 then preallocate to allow inserting
+ * the specified number of elements without further allocations.
+ */
+void oidset_init(struct oidset *set, size_t initial_size);
 
 /**
  * Returns true iff `set` contains `oid`.
@@ -39,9 +49,44 @@ int oidset_contains(const struct oidset *set, const struct object_id *oid);
 int oidset_insert(struct oidset *set, const struct object_id *oid);
 
 /**
+ * Remove the oid from the set.
+ *
+ * Returns 1 if the oid was present in the set, 0 otherwise.
+ */
+int oidset_remove(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);
 
+struct oidset_iter {
+       kh_oid_t *set;
+       khiter_t iter;
+};
+
+static inline void oidset_iter_init(struct oidset *set,
+                                   struct oidset_iter *iter)
+{
+       iter->set = &set->set;
+       iter->iter = kh_begin(iter->set);
+}
+
+static inline struct object_id *oidset_iter_next(struct oidset_iter *iter)
+{
+       for (; iter->iter != kh_end(iter->set); iter->iter++) {
+               if (kh_exist(iter->set, iter->iter))
+                       return &kh_key(iter->set, iter->iter++);
+       }
+       return NULL;
+}
+
+static inline struct object_id *oidset_iter_first(struct oidset *set,
+                                                 struct oidset_iter *iter)
+{
+       oidset_iter_init(set, iter);
+       return oidset_iter_next(iter);
+}
+
 #endif /* OIDSET_H */