mirror of
https://github.com/python/cpython.git
synced 2025-10-31 05:31:20 +00:00
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* Set object interface */
|
|
|
|
#ifndef Py_SETOBJECT_H
|
|
#define Py_SETOBJECT_H
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/*
|
|
There are three kinds of slots 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 {
|
|
long hash; /* cached hash code for the entry key */
|
|
PyObject *key;
|
|
} setentry;
|
|
|
|
|
|
/*
|
|
This data structure is shared by set and frozenset objects.
|
|
*/
|
|
|
|
typedef struct _setobject PySetObject;
|
|
struct _setobject {
|
|
PyObject_HEAD
|
|
|
|
int fill; /* # Active + # Dummy */
|
|
int used; /* # Active */
|
|
|
|
/* 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.
|
|
*/
|
|
int mask;
|
|
|
|
/* table points to smalltable for small tables, else to
|
|
* additional malloc'ed memory. table is never NULL! This rule
|
|
* saves repeated runtime null-tests.
|
|
*/
|
|
setentry *table;
|
|
setentry *(*lookup)(PySetObject *so, PyObject *key, long hash);
|
|
setentry smalltable[PySet_MINSIZE];
|
|
|
|
long hash; /* only used by frozenset objects */
|
|
PyObject *weakreflist; /* List of weak references */
|
|
};
|
|
|
|
PyAPI_DATA(PyTypeObject) PySet_Type;
|
|
PyAPI_DATA(PyTypeObject) PyFrozenSet_Type;
|
|
|
|
/* Invariants for frozensets:
|
|
* data is immutable.
|
|
* hash is the hash of the frozenset or -1 if not computed yet.
|
|
* Invariants for sets:
|
|
* hash is -1
|
|
*/
|
|
|
|
#define PyFrozenSet_CheckExact(ob) ((ob)->ob_type == &PyFrozenSet_Type)
|
|
#define PyAnySet_CheckExact(ob) \
|
|
((ob)->ob_type == &PySet_Type || (ob)->ob_type == &PyFrozenSet_Type)
|
|
#define PyAnySet_Check(ob) \
|
|
((ob)->ob_type == &PySet_Type || (ob)->ob_type == &PyFrozenSet_Type || \
|
|
PyType_IsSubtype((ob)->ob_type, &PySet_Type) || \
|
|
PyType_IsSubtype((ob)->ob_type, &PyFrozenSet_Type))
|
|
|
|
PyAPI_FUNC(PyObject *) PySet_New(PyObject *);
|
|
PyAPI_FUNC(PyObject *) PyFrozenSet_New(PyObject *);
|
|
PyAPI_FUNC(int) PySet_Size(PyObject *anyset);
|
|
#define PySet_GET_SIZE(so) (((PySetObject *)(so))->used)
|
|
PyAPI_FUNC(int) PySet_Contains(PyObject *anyset, PyObject *key);
|
|
PyAPI_FUNC(int) PySet_Discard(PyObject *set, PyObject *key);
|
|
PyAPI_FUNC(int) PySet_Add(PyObject *set, PyObject *key);
|
|
PyAPI_FUNC(PyObject *) PySet_Pop(PyObject *set);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif /* !Py_SETOBJECT_H */
|