summaryrefslogtreecommitdiffstats
path: root/Modules/hashtable.h
blob: 539e490c3197393abcd857773910885b18e1c510 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
#ifndef Py_HASHTABLE_H
#define Py_HASHTABLE_H

/* The whole API is private */
#ifndef Py_LIMITED_API

typedef struct _Py_slist_item_s {
    struct _Py_slist_item_s *next;
} _Py_slist_item_t;

typedef struct {
    _Py_slist_item_t *head;
} _Py_slist_t;

#define _Py_SLIST_ITEM_NEXT(ITEM) (((_Py_slist_item_t *)ITEM)->next)

#define _Py_SLIST_HEAD(SLIST) (((_Py_slist_t *)SLIST)->head)

typedef struct {
    /* used by _Py_hashtable_t.buckets to link entries */
    _Py_slist_item_t _Py_slist_item;

    const void *key;
    Py_uhash_t key_hash;

    /* data follows */
} _Py_hashtable_entry_t;

#define _PY_HASHTABLE_ENTRY_DATA(ENTRY) \
        ((char *)(ENTRY) + sizeof(_Py_hashtable_entry_t))

#define _Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(ENTRY) \
        (*(void **)_PY_HASHTABLE_ENTRY_DATA(ENTRY))

#define _Py_HASHTABLE_ENTRY_READ_DATA(TABLE, DATA, DATA_SIZE, ENTRY) \
    do { \
        assert((DATA_SIZE) == (TABLE)->data_size); \
        memcpy(DATA, _PY_HASHTABLE_ENTRY_DATA(ENTRY), DATA_SIZE); \
    } while (0)

typedef Py_uhash_t (*_Py_hashtable_hash_func) (const void *key);
typedef int (*_Py_hashtable_compare_func) (const void *key, const _Py_hashtable_entry_t *he);
typedef void* (*_Py_hashtable_copy_data_func)(void *data);
typedef void (*_Py_hashtable_free_data_func)(void *data);
typedef size_t (*_Py_hashtable_get_data_size_func)(void *data);

typedef struct {
    /* allocate a memory block */
    void* (*malloc) (size_t size);

    /* release a memory block */
    void (*free) (void *ptr);
} _Py_hashtable_allocator_t;

typedef struct {
    size_t num_buckets;
    size_t entries; /* Total number of entries in the table. */
    _Py_slist_t *buckets;
    size_t data_size;

    _Py_hashtable_hash_func hash_func;
    _Py_hashtable_compare_func compare_func;
    _Py_hashtable_copy_data_func copy_data_func;
    _Py_hashtable_free_data_func free_data_func;
    _Py_hashtable_get_data_size_func get_data_size_func;
    _Py_hashtable_allocator_t alloc;
} _Py_hashtable_t;

/* hash and compare functions for integers and pointers */
PyAPI_FUNC(Py_uhash_t) _Py_hashtable_hash_ptr(const void *key);
PyAPI_FUNC(Py_uhash_t) _Py_hashtable_hash_int(const void *key);
PyAPI_FUNC(int) _Py_hashtable_compare_direct(const void *key, const _Py_hashtable_entry_t *entry);

PyAPI_FUNC(_Py_hashtable_t *) _Py_hashtable_new(
    size_t data_size,
    _Py_hashtable_hash_func hash_func,
    _Py_hashtable_compare_func compare_func);
PyAPI_FUNC(_Py_hashtable_t *) _Py_hashtable_new_full(
    size_t data_size,
    size_t init_size,
    _Py_hashtable_hash_func hash_func,
    _Py_hashtable_compare_func compare_func,
    _Py_hashtable_copy_data_func copy_data_func,
    _Py_hashtable_free_data_func free_data_func,
    _Py_hashtable_get_data_size_func get_data_size_func,
    _Py_hashtable_allocator_t *allocator);
PyAPI_FUNC(_Py_hashtable_t *) _Py_hashtable_copy(_Py_hashtable_t *src);
PyAPI_FUNC(void) _Py_hashtable_clear(_Py_hashtable_t *ht);
PyAPI_FUNC(void) _Py_hashtable_destroy(_Py_hashtable_t *ht);

typedef int (*_Py_hashtable_foreach_func) (_Py_hashtable_entry_t *entry, void *arg);

PyAPI_FUNC(int) _Py_hashtable_foreach(
    _Py_hashtable_t *ht,
    _Py_hashtable_foreach_func func, void *arg);
PyAPI_FUNC(size_t) _Py_hashtable_size(_Py_hashtable_t *ht);

PyAPI_FUNC(_Py_hashtable_entry_t*) _Py_hashtable_get_entry(
    _Py_hashtable_t *ht,
    const void *key);
PyAPI_FUNC(int) _Py_hashtable_set(
    _Py_hashtable_t *ht,
    const void *key,
    void *data,
    size_t data_size);
PyAPI_FUNC(int) _Py_hashtable_get(
    _Py_hashtable_t *ht,
    const void *key,
    void *data,
    size_t data_size);
PyAPI_FUNC(int) _Py_hashtable_pop(
    _Py_hashtable_t *ht,
    const void *key,
    void *data,
    size_t data_size);
PyAPI_FUNC(void) _Py_hashtable_delete(
    _Py_hashtable_t *ht,
    const void *key);

#define _Py_HASHTABLE_SET(TABLE, KEY, DATA) \
    _Py_hashtable_set(TABLE, KEY, &(DATA), sizeof(DATA))

#define _Py_HASHTABLE_GET(TABLE, KEY, DATA) \
    _Py_hashtable_get(TABLE, KEY, &(DATA), sizeof(DATA))

#endif   /* Py_LIMITED_API */

#endif