mirror of https://github.com/python/cpython
107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/* Set object interface */
|
|
|
|
#ifndef Py_SETOBJECT_H
|
|
#define Py_SETOBJECT_H
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#ifndef Py_LIMITED_API
|
|
|
|
/* There are three kinds of entries in the table:
|
|
|
|
1. Unused: key == NULL
|
|
2. Active: key != NULL and key != dummy
|
|
3. Dummy: key == dummy
|
|
|
|
Note: .pop() abuses the hash field of an Unused or Dummy slot to
|
|
hold a search finger. The hash field of Unused or Dummy slots has
|
|
no meaning otherwise.
|
|
*/
|
|
|
|
#define PySet_MINSIZE 8
|
|
|
|
typedef struct {
|
|
PyObject *key;
|
|
Py_hash_t hash; /* Cached hash code of the key */
|
|
} setentry;
|
|
|
|
/* The SetObject data structure is shared by set and frozenset objects.
|
|
|
|
Invariant for sets:
|
|
- hash is -1
|
|
|
|
Invariants for frozensets:
|
|
- data is immutable.
|
|
- hash is the hash of the frozenset or -1 if not computed yet.
|
|
|
|
*/
|
|
|
|
typedef struct _setobject {
|
|
PyObject_HEAD
|
|
|
|
Py_ssize_t fill; /* Number active and dummy entries*/
|
|
Py_ssize_t used; /* Number active entries */
|
|
|
|
/* The table contains 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 mask;
|
|
|
|
/* The table points to a fixed-size smalltable for small tables
|
|
* or to additional malloc'ed memory for bigger tables.
|
|
* The table pointer is never NULL which saves us from repeated
|
|
* runtime null-tests.
|
|
*/
|
|
setentry *table;
|
|
setentry *(*lookup)(struct _setobject *so, PyObject *key, Py_hash_t hash);
|
|
Py_hash_t hash; /* Only used by frozenset objects */
|
|
setentry smalltable[PySet_MINSIZE];
|
|
|
|
PyObject *weakreflist; /* List of weak references */
|
|
} PySetObject;
|
|
|
|
#define PySet_GET_SIZE(so) (((PySetObject *)(so))->used)
|
|
|
|
PyAPI_DATA(PyObject *) _PySet_Dummy;
|
|
|
|
PyAPI_FUNC(int) _PySet_NextEntry(PyObject *set, Py_ssize_t *pos, PyObject **key, Py_hash_t *hash);
|
|
PyAPI_FUNC(int) _PySet_Update(PyObject *set, PyObject *iterable);
|
|
PyAPI_FUNC(int) PySet_ClearFreeList(void);
|
|
|
|
#endif /* Section excluded by Py_LIMITED_API */
|
|
|
|
PyAPI_DATA(PyTypeObject) PySet_Type;
|
|
PyAPI_DATA(PyTypeObject) PyFrozenSet_Type;
|
|
PyAPI_DATA(PyTypeObject) PySetIter_Type;
|
|
|
|
PyAPI_FUNC(PyObject *) PySet_New(PyObject *);
|
|
PyAPI_FUNC(PyObject *) PyFrozenSet_New(PyObject *);
|
|
|
|
PyAPI_FUNC(int) PySet_Add(PyObject *set, PyObject *key);
|
|
PyAPI_FUNC(int) PySet_Clear(PyObject *set);
|
|
PyAPI_FUNC(int) PySet_Contains(PyObject *anyset, PyObject *key);
|
|
PyAPI_FUNC(int) PySet_Discard(PyObject *set, PyObject *key);
|
|
PyAPI_FUNC(PyObject *) PySet_Pop(PyObject *set);
|
|
PyAPI_FUNC(Py_ssize_t) PySet_Size(PyObject *anyset);
|
|
|
|
#define PyFrozenSet_CheckExact(ob) (Py_TYPE(ob) == &PyFrozenSet_Type)
|
|
#define PyAnySet_CheckExact(ob) \
|
|
(Py_TYPE(ob) == &PySet_Type || Py_TYPE(ob) == &PyFrozenSet_Type)
|
|
#define PyAnySet_Check(ob) \
|
|
(Py_TYPE(ob) == &PySet_Type || Py_TYPE(ob) == &PyFrozenSet_Type || \
|
|
PyType_IsSubtype(Py_TYPE(ob), &PySet_Type) || \
|
|
PyType_IsSubtype(Py_TYPE(ob), &PyFrozenSet_Type))
|
|
#define PySet_Check(ob) \
|
|
(Py_TYPE(ob) == &PySet_Type || \
|
|
PyType_IsSubtype(Py_TYPE(ob), &PySet_Type))
|
|
#define PyFrozenSet_Check(ob) \
|
|
(Py_TYPE(ob) == &PyFrozenSet_Type || \
|
|
PyType_IsSubtype(Py_TYPE(ob), &PyFrozenSet_Type))
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif /* !Py_SETOBJECT_H */
|