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oidmap.h 2.29 KB
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#ifndef OIDMAP_H
#define OIDMAP_H
#include "hash-ll.h"
#include "hashmap.h"
/*
* struct oidmap_entry is a structure representing an entry in the hash table,
* which must be used as first member of user data structures.
*
* Users should set the oid field. oidmap_put() will populate the
* internal_entry field.
*/
struct oidmap_entry {
/* For internal use only */
struct hashmap_entry internal_entry;
struct object_id oid;
};
struct oidmap {
struct hashmap map;
};
#define OIDMAP_INIT { { NULL } }
/*
* Initializes an oidmap structure.
*
* `map` is the oidmap to initialize.
*
* If the total number of entries is known in advance, the `initial_size`
* parameter may be used to preallocate a sufficiently large table and thus
* prevent expensive resizing. If 0, the table is dynamically resized.
*/
void oidmap_init(struct oidmap *map, size_t initial_size);
/*
* Frees an oidmap structure and allocated memory.
*
* If `free_entries` is true, each oidmap_entry in the map is freed as well
* using stdlibs free().
*/
void oidmap_free(struct oidmap *map, int free_entries);
/*
* Returns the oidmap entry for the specified oid, or NULL if not found.
*/
void *oidmap_get(const struct oidmap *map,
const struct object_id *key);
/*
* Adds or replaces an oidmap entry.
*
* ((struct oidmap_entry *) entry)->internal_entry will be populated by this
* function.
*
* Returns the replaced entry, or NULL if not found (i.e. the entry was added).
*/
void *oidmap_put(struct oidmap *map, void *entry);
/*
* Removes an oidmap entry matching the specified oid.
*
* Returns the removed entry, or NULL if not found.
*/
void *oidmap_remove(struct oidmap *map, const struct object_id *key);
struct oidmap_iter {
struct hashmap_iter h_iter;
};
static inline void oidmap_iter_init(struct oidmap *map, struct oidmap_iter *iter)
{
hashmap_iter_init(&map->map, &iter->h_iter);
}
static inline void *oidmap_iter_next(struct oidmap_iter *iter)
{
/* TODO: this API could be reworked to do compile-time type checks */
return (void *)hashmap_iter_next(&iter->h_iter);
}
static inline void *oidmap_iter_first(struct oidmap *map,
struct oidmap_iter *iter)
{
oidmap_iter_init(map, iter);
/* TODO: this API could be reworked to do compile-time type checks */
return (void *)oidmap_iter_next(iter);
}
#endif
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