mirror of
https://github.com/python/cpython.git
synced 2024-12-01 22:04:04 +08:00
611b0fa94c
Issue #28127: Add a function to check that a dictionary remains consistent after any change. By default, tables are not checked, only basic attributes. Define DEBUG_PYDICT (ex: gcc -D DEBUG_PYDICT) to also check dictionary "content".
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
#ifndef Py_DICT_COMMON_H
|
|
#define Py_DICT_COMMON_H
|
|
|
|
typedef struct {
|
|
/* Cached hash code of me_key. */
|
|
Py_hash_t me_hash;
|
|
PyObject *me_key;
|
|
PyObject *me_value; /* This field is only meaningful for combined tables */
|
|
} PyDictKeyEntry;
|
|
|
|
/* dict_lookup_func() returns index of entry which can be used like DK_ENTRIES(dk)[index].
|
|
* -1 when no entry found, -3 when compare raises error.
|
|
*/
|
|
typedef Py_ssize_t (*dict_lookup_func)
|
|
(PyDictObject *mp, PyObject *key, Py_hash_t hash, PyObject ***value_addr,
|
|
Py_ssize_t *hashpos);
|
|
|
|
#define DKIX_EMPTY (-1)
|
|
#define DKIX_DUMMY (-2) /* Used internally */
|
|
#define DKIX_ERROR (-3)
|
|
|
|
/* See dictobject.c for actual layout of DictKeysObject */
|
|
struct _dictkeysobject {
|
|
Py_ssize_t dk_refcnt;
|
|
|
|
/* Size of the hash table (dk_indices). It must be a power of 2. */
|
|
Py_ssize_t dk_size;
|
|
|
|
/* Function to lookup in the hash table (dk_indices):
|
|
|
|
- lookdict(): general-purpose, and may return DKIX_ERROR if (and
|
|
only if) a comparison raises an exception.
|
|
|
|
- lookdict_unicode(): specialized to Unicode string keys, comparison of
|
|
which can never raise an exception; that function can never return
|
|
DKIX_ERROR.
|
|
|
|
- lookdict_unicode_nodummy(): similar to lookdict_unicode() but further
|
|
specialized for Unicode string keys that cannot be the <dummy> value.
|
|
|
|
- lookdict_split(): Version of lookdict() for split tables. */
|
|
dict_lookup_func dk_lookup;
|
|
|
|
/* Number of usable entries in dk_entries. */
|
|
Py_ssize_t dk_usable;
|
|
|
|
/* Number of used entries in dk_entries. */
|
|
Py_ssize_t dk_nentries;
|
|
|
|
/* Actual hash table of dk_size entries. It holds indices in dk_entries,
|
|
or DKIX_EMPTY(-1) or DKIX_DUMMY(-2).
|
|
|
|
Indices must be: 0 <= indice < USABLE_FRACTION(dk_size).
|
|
|
|
The size in bytes of an indice depends on dk_size:
|
|
|
|
- 1 byte if dk_size <= 0xff (char*)
|
|
- 2 bytes if dk_size <= 0xffff (int16_t*)
|
|
- 4 bytes if dk_size <= 0xffffffff (int32_t*)
|
|
- 8 bytes otherwise (int64_t*)
|
|
|
|
Dynamically sized, 8 is minimum. */
|
|
union {
|
|
int8_t as_1[8];
|
|
int16_t as_2[4];
|
|
int32_t as_4[2];
|
|
#if SIZEOF_VOID_P > 4
|
|
int64_t as_8[1];
|
|
#endif
|
|
} dk_indices;
|
|
|
|
/* "PyDictKeyEntry dk_entries[dk_usable];" array follows:
|
|
see the DK_ENTRIES() macro */
|
|
};
|
|
|
|
#endif
|