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#ifndef Py_CPYTHON_DICTOBJECT_H
#  error "this header file must not be included directly"
#endif

typedef struct _dictkeysobject PyDictKeysObject;
typedef struct _dictvalues PyDictValues;

/* The ma_values pointer is NULL for a combined table
 * or points to an array of PyObject* for a split table
 */
typedef struct {
    PyObject_HEAD

    /* Number of items in the dictionary */
    Py_ssize_t ma_used;

    /* Dictionary version: globally unique, value change each time
       the dictionary is modified */
#ifdef Py_BUILD_CORE
    uint64_t ma_version_tag;
#else
    Py_DEPRECATED(3.12) uint64_t ma_version_tag;
#endif

    PyDictKeysObject *ma_keys;

    /* If ma_values is NULL, the table is "combined": keys and values
       are stored in ma_keys.

       If ma_values is not NULL, the table is split:
       keys are stored in ma_keys and values are stored in ma_values */
    PyDictValues *ma_values;
} PyDictObject;

PyAPI_FUNC(PyObject *) _PyDict_GetItem_KnownHash(PyObject *mp, PyObject *key,
                                       Py_hash_t hash);
PyAPI_FUNC(PyObject *) _PyDict_GetItemWithError(PyObject *dp, PyObject *key);
PyAPI_FUNC(PyObject *) _PyDict_GetItemIdWithError(PyObject *dp,
                                                  _Py_Identifier *key);
PyAPI_FUNC(PyObject *) _PyDict_GetItemStringWithError(PyObject *, const char *);
PyAPI_FUNC(PyObject *) PyDict_SetDefault(
    PyObject *mp, PyObject *key, PyObject *defaultobj);
PyAPI_FUNC(int) _PyDict_SetItem_KnownHash(PyObject *mp, PyObject *key,
                                          PyObject *item, Py_hash_t hash);
PyAPI_FUNC(int) _PyDict_DelItem_KnownHash(PyObject *mp, PyObject *key,
                                          Py_hash_t hash);
PyAPI_FUNC(int) _PyDict_DelItemIf(PyObject *mp, PyObject *key,
                                  int (*predicate)(PyObject *value));
PyAPI_FUNC(int) _PyDict_Next(
    PyObject *mp, Py_ssize_t *pos, PyObject **key, PyObject **value, Py_hash_t *hash);

/* Get the number of items of a dictionary. */
static inline Py_ssize_t PyDict_GET_SIZE(PyObject *op) {
    PyDictObject *mp;
    assert(PyDict_Check(op));
    mp = _Py_CAST(PyDictObject*, op);
    return mp->ma_used;
}
#define PyDict_GET_SIZE(op) PyDict_GET_SIZE(_PyObject_CAST(op))

PyAPI_FUNC(int) _PyDict_Contains_KnownHash(PyObject *, PyObject *, Py_hash_t);
PyAPI_FUNC(int) _PyDict_ContainsId(PyObject *, _Py_Identifier *);
PyAPI_FUNC(PyObject *) _PyDict_NewPresized(Py_ssize_t minused);
PyAPI_FUNC(void) _PyDict_MaybeUntrack(PyObject *mp);
PyAPI_FUNC(int) _PyDict_HasOnlyStringKeys(PyObject *mp);
PyAPI_FUNC(Py_ssize_t) _PyDict_SizeOf(PyDictObject *);
PyAPI_FUNC(PyObject *) _PyDict_Pop(PyObject *, PyObject *, PyObject *);
#define _PyDict_HasSplitTable(d) ((d)->ma_values != NULL)

/* Like PyDict_Merge, but override can be 0, 1 or 2.  If override is 0,
   the first occurrence of a key wins, if override is 1, the last occurrence
   of a key wins, if override is 2, a KeyError with conflicting key as
   argument is raised.
*/
PyAPI_FUNC(int) _PyDict_MergeEx(PyObject *mp, PyObject *other, int override);
PyAPI_FUNC(int) _PyDict_SetItemId(PyObject *dp, _Py_Identifier *key, PyObject *item);

PyAPI_FUNC(int) _PyDict_DelItemId(PyObject *mp, _Py_Identifier *key);
PyAPI_FUNC(void) _PyDict_DebugMallocStats(FILE *out);

/* _PyDictView */

typedef struct {
    PyObject_HEAD
    PyDictObject *dv_dict;
} _PyDictViewObject;

PyAPI_FUNC(PyObject *) _PyDictView_New(PyObject *, PyTypeObject *);
PyAPI_FUNC(PyObject *) _PyDictView_Intersect(PyObject* self, PyObject *other);

/* Dictionary watchers */

#define PY_FOREACH_DICT_EVENT(V) \
    V(ADDED)                     \
    V(MODIFIED)                  \
    V(DELETED)                   \
    V(CLONED)                    \
    V(CLEARED)                   \
    V(DEALLOCATED)

typedef enum {
    #define PY_DEF_EVENT(EVENT) PyDict_EVENT_##EVENT,
    PY_FOREACH_DICT_EVENT(PY_DEF_EVENT)
    #undef PY_DEF_EVENT
} PyDict_WatchEvent;

// Callback to be invoked when a watched dict is cleared, dealloced, or modified.
// In clear/dealloc case, key and new_value will be NULL. Otherwise, new_value will be the
// new value for key, NULL if key is being deleted.
typedef int(*PyDict_WatchCallback)(PyDict_WatchEvent event, PyObject* dict, PyObject* key, PyObject* new_value);

// Register/unregister a dict-watcher callback
PyAPI_FUNC(int) PyDict_AddWatcher(PyDict_WatchCallback callback);
PyAPI_FUNC(int) PyDict_ClearWatcher(int watcher_id);

// Mark given dictionary as "watched" (callback will be called if it is modified)
PyAPI_FUNC(int) PyDict_Watch(int watcher_id, PyObject* dict);
PyAPI_FUNC(int) PyDict_Unwatch(int watcher_id, PyObject* dict);