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-#ifndef Py_DICTOBJECT_H
-#define Py_DICTOBJECT_H
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-/* Dictionary object type -- mapping from hashable object to object */
-
-/* The distribution includes a separate file, Objects/dictnotes.txt,
- describing explorations into dictionary design and optimization.
- It covers typical dictionary use patterns, the parameters for
- tuning dictionaries, and several ideas for possible optimizations.
-*/
-
-/*
-There are three kinds of slots in the table:
-
-1. Unused. me_key == me_value == NULL
- Does not hold an active (key, value) pair now and never did. Unused can
- transition to Active upon key insertion. This is the only case in which
- me_key is NULL, and is each slot's initial state.
-
-2. Active. me_key != NULL and me_key != dummy and me_value != NULL
- Holds an active (key, value) pair. Active can transition to Dummy upon
- key deletion. This is the only case in which me_value != NULL.
-
-3. Dummy. me_key == dummy and me_value == NULL
- Previously held an active (key, value) pair, but that was deleted and an
- active pair has not yet overwritten the slot. Dummy can transition to
- Active upon key insertion. Dummy slots cannot be made Unused again
- (cannot have me_key set to NULL), else the probe sequence in case of
- collision would have no way to know they were once active.
-
-Note: .popitem() abuses the me_hash field of an Unused or Dummy slot to
-hold a search finger. The me_hash field of Unused or Dummy slots has no
-meaning otherwise.
-*/
-
-/* PyDict_MINSIZE is the minimum size of a dictionary. This many slots are
- * allocated directly in the dict object (in the ma_smalltable member).
- * It must be a power of 2, and at least 4. 8 allows dicts with no more
- * than 5 active entries to live in ma_smalltable (and so avoid an
- * additional malloc); instrumentation suggested this suffices for the
- * majority of dicts (consisting mostly of usually-small instance dicts and
- * usually-small dicts created to pass keyword arguments).
- */
-#define PyDict_MINSIZE 8
-
-typedef struct {
- /* Cached hash code of me_key. Note that hash codes are C longs.
- * We have to use Py_ssize_t instead because dict_popitem() abuses
- * me_hash to hold a search finger.
- */
- Py_ssize_t me_hash;
- PyObject *me_key;
- PyObject *me_value;
-} PyDictEntry;
-
-/*
-To ensure the lookup algorithm terminates, there must be at least one Unused
-slot (NULL key) in the table.
-The value ma_fill is the number of non-NULL keys (sum of Active and Dummy);
-ma_used is the number of non-NULL, non-dummy keys (== the number of non-NULL
-values == the number of Active items).
-To avoid slowing down lookups on a near-full table, we resize the table when
-it's two-thirds full.
-*/
-typedef struct _dictobject PyDictObject;
-struct _dictobject {
- PyObject_HEAD
- Py_ssize_t ma_fill; /* # Active + # Dummy */
- Py_ssize_t ma_used; /* # Active */
-
- /* The table contains ma_mask + 1 slots, and that's a power of 2.
- * We store the mask instead of the size because the mask is more
- * frequently needed.
- */
- Py_ssize_t ma_mask;
-
- /* ma_table points to ma_smalltable for small tables, else to
- * additional malloc'ed memory. ma_table is never NULL! This rule
- * saves repeated runtime null-tests in the workhorse getitem and
- * setitem calls.
- */
- PyDictEntry *ma_table;
- PyDictEntry *(*ma_lookup)(PyDictObject *mp, PyObject *key, long hash);
- PyDictEntry ma_smalltable[PyDict_MINSIZE];
-};
-
-PyAPI_DATA(PyTypeObject) PyDict_Type;
-PyAPI_DATA(PyTypeObject) PyDictIterKey_Type;
-PyAPI_DATA(PyTypeObject) PyDictIterValue_Type;
-PyAPI_DATA(PyTypeObject) PyDictIterItem_Type;
-PyAPI_DATA(PyTypeObject) PyDictKeys_Type;
-PyAPI_DATA(PyTypeObject) PyDictItems_Type;
-PyAPI_DATA(PyTypeObject) PyDictValues_Type;
-
-#define PyDict_Check(op) \
- PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_DICT_SUBCLASS)
-#define PyDict_CheckExact(op) (Py_TYPE(op) == &PyDict_Type)
-#define PyDictKeys_Check(op) (Py_TYPE(op) == &PyDictKeys_Type)
-#define PyDictItems_Check(op) (Py_TYPE(op) == &PyDictItems_Type)
-#define PyDictValues_Check(op) (Py_TYPE(op) == &PyDictValues_Type)
-/* This excludes Values, since they are not sets. */
-# define PyDictViewSet_Check(op) \
- (PyDictKeys_Check(op) || PyDictItems_Check(op))
-
-PyAPI_FUNC(PyObject *) PyDict_New(void);
-PyAPI_FUNC(PyObject *) PyDict_GetItem(PyObject *mp, PyObject *key);
-PyAPI_FUNC(int) PyDict_SetItem(PyObject *mp, PyObject *key, PyObject *item);
-PyAPI_FUNC(int) PyDict_DelItem(PyObject *mp, PyObject *key);
-PyAPI_FUNC(void) PyDict_Clear(PyObject *mp);
-PyAPI_FUNC(int) PyDict_Next(
- PyObject *mp, Py_ssize_t *pos, PyObject **key, PyObject **value);
-PyAPI_FUNC(int) _PyDict_Next(
- PyObject *mp, Py_ssize_t *pos, PyObject **key, PyObject **value, long *hash);
-PyAPI_FUNC(PyObject *) PyDict_Keys(PyObject *mp);
-PyAPI_FUNC(PyObject *) PyDict_Values(PyObject *mp);
-PyAPI_FUNC(PyObject *) PyDict_Items(PyObject *mp);
-PyAPI_FUNC(Py_ssize_t) PyDict_Size(PyObject *mp);
-PyAPI_FUNC(PyObject *) PyDict_Copy(PyObject *mp);
-PyAPI_FUNC(int) PyDict_Contains(PyObject *mp, PyObject *key);
-PyAPI_FUNC(int) _PyDict_Contains(PyObject *mp, PyObject *key, long hash);
-PyAPI_FUNC(PyObject *) _PyDict_NewPresized(Py_ssize_t minused);
-PyAPI_FUNC(void) _PyDict_MaybeUntrack(PyObject *mp);
-
-/* PyDict_Update(mp, other) is equivalent to PyDict_Merge(mp, other, 1). */
-PyAPI_FUNC(int) PyDict_Update(PyObject *mp, PyObject *other);
-
-/* PyDict_Merge updates/merges from a mapping object (an object that
- supports PyMapping_Keys() and PyObject_GetItem()). If override is true,
- the last occurrence of a key wins, else the first. The Python
- dict.update(other) is equivalent to PyDict_Merge(dict, other, 1).
-*/
-PyAPI_FUNC(int) PyDict_Merge(PyObject *mp,
- PyObject *other,
- int override);
-
-/* PyDict_MergeFromSeq2 updates/merges from an iterable object producing
- iterable objects of length 2. If override is true, the last occurrence
- of a key wins, else the first. The Python dict constructor dict(seq2)
- is equivalent to dict={}; PyDict_MergeFromSeq(dict, seq2, 1).
-*/
-PyAPI_FUNC(int) PyDict_MergeFromSeq2(PyObject *d,
- PyObject *seq2,
- int override);
-
-PyAPI_FUNC(PyObject *) PyDict_GetItemString(PyObject *dp, const char *key);
-PyAPI_FUNC(int) PyDict_SetItemString(PyObject *dp, const char *key, PyObject *item);
-PyAPI_FUNC(int) PyDict_DelItemString(PyObject *dp, const char *key);
-
-#ifdef __cplusplus
-}
-#endif
-#endif /* !Py_DICTOBJECT_H */