1 /* Set object interface */ 2 3 #ifndef Py_SETOBJECT_H 4 #define Py_SETOBJECT_H 5 #ifdef __cplusplus 6 extern "C" { 7 #endif 8 9 10 /* 11 There are three kinds of slots in the table: 12 13 1. Unused: key == NULL 14 2. Active: key != NULL and key != dummy 15 3. Dummy: key == dummy 16 17 Note: .pop() abuses the hash field of an Unused or Dummy slot to 18 hold a search finger. The hash field of Unused or Dummy slots has 19 no meaning otherwise. 20 */ 21 22 #define PySet_MINSIZE 8 23 24 typedef struct { 25 long hash; /* cached hash code for the entry key */ 26 PyObject *key; 27 } setentry; 28 29 30 /* 31 This data structure is shared by set and frozenset objects. 32 */ 33 34 typedef struct _setobject PySetObject; 35 struct _setobject { 36 PyObject_HEAD 37 38 Py_ssize_t fill; /* # Active + # Dummy */ 39 Py_ssize_t used; /* # Active */ 40 41 /* The table contains mask + 1 slots, and that's a power of 2. 42 * We store the mask instead of the size because the mask is more 43 * frequently needed. 44 */ 45 Py_ssize_t mask; 46 47 /* table points to smalltable for small tables, else to 48 * additional malloc'ed memory. table is never NULL! This rule 49 * saves repeated runtime null-tests. 50 */ 51 setentry *table; 52 setentry *(*lookup)(PySetObject *so, PyObject *key, long hash); 53 setentry smalltable[PySet_MINSIZE]; 54 55 long hash; /* only used by frozenset objects */ 56 PyObject *weakreflist; /* List of weak references */ 57 }; 58 59 PyAPI_DATA(PyTypeObject) PySet_Type; 60 PyAPI_DATA(PyTypeObject) PyFrozenSet_Type; 61 62 /* Invariants for frozensets: 63 * data is immutable. 64 * hash is the hash of the frozenset or -1 if not computed yet. 65 * Invariants for sets: 66 * hash is -1 67 */ 68 69 #define PyFrozenSet_CheckExact(ob) (Py_TYPE(ob) == &PyFrozenSet_Type) 70 #define PyAnySet_CheckExact(ob) \ 71 (Py_TYPE(ob) == &PySet_Type || Py_TYPE(ob) == &PyFrozenSet_Type) 72 #define PyAnySet_Check(ob) \ 73 (Py_TYPE(ob) == &PySet_Type || Py_TYPE(ob) == &PyFrozenSet_Type || \ 74 PyType_IsSubtype(Py_TYPE(ob), &PySet_Type) || \ 75 PyType_IsSubtype(Py_TYPE(ob), &PyFrozenSet_Type)) 76 #define PySet_Check(ob) \ 77 (Py_TYPE(ob) == &PySet_Type || \ 78 PyType_IsSubtype(Py_TYPE(ob), &PySet_Type)) 79 #define PyFrozenSet_Check(ob) \ 80 (Py_TYPE(ob) == &PyFrozenSet_Type || \ 81 PyType_IsSubtype(Py_TYPE(ob), &PyFrozenSet_Type)) 82 83 PyAPI_FUNC(PyObject *) PySet_New(PyObject *); 84 PyAPI_FUNC(PyObject *) PyFrozenSet_New(PyObject *); 85 PyAPI_FUNC(Py_ssize_t) PySet_Size(PyObject *anyset); 86 #define PySet_GET_SIZE(so) (((PySetObject *)(so))->used) 87 PyAPI_FUNC(int) PySet_Clear(PyObject *set); 88 PyAPI_FUNC(int) PySet_Contains(PyObject *anyset, PyObject *key); 89 PyAPI_FUNC(int) PySet_Discard(PyObject *set, PyObject *key); 90 PyAPI_FUNC(int) PySet_Add(PyObject *set, PyObject *key); 91 PyAPI_FUNC(int) _PySet_Next(PyObject *set, Py_ssize_t *pos, PyObject **key); 92 PyAPI_FUNC(int) _PySet_NextEntry(PyObject *set, Py_ssize_t *pos, PyObject **key, long *hash); 93 PyAPI_FUNC(PyObject *) PySet_Pop(PyObject *set); 94 PyAPI_FUNC(int) _PySet_Update(PyObject *set, PyObject *iterable); 95 96 #ifdef __cplusplus 97 } 98 #endif 99 #endif /* !Py_SETOBJECT_H */ 100
