summaryrefslogtreecommitdiff
path: root/src/emap/hashtable.c
blob: 9d2908d6d0511e0465de6ae6f61a0a3079469762 (plain) (blame)
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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
// Copyright (c) Copyright (c) Hercules Dev Team, licensed under GNU GPL.
// Copyright (c) 2015 - 2016 Evol developers

#include "common/hercules.h"

#include "common/db.h"
#include "common/memmgr.h"
#include "emap/hashtable.h"

struct htreg_interface htreg_s;
struct htreg_interface *htreg;

int64 htreg_new_hashtable(void)
{
    int64 id = htreg->last_id++;
    struct DBMap *ht = strdb_alloc(DB_OPT_DUP_KEY|DB_OPT_RELEASE_DATA,
                                   HT_MAX_KEY_LEN);
    i64db_put(htreg->htables, id, ht);
    return id;
}

bool htreg_destroy_hashtable(int64 id)
{
    struct DBMap *ht = i64db_get(htreg->htables, id);
    if (ht)
    {
        db_destroy(ht);
        i64db_remove(htreg->htables, id);
        return true;
    }
    return false;
}

bool htreg_hashtable_exists(int64 id)
{
    return i64db_exists(htreg->htables, id);
}

int64 htreg_hashtable_size(int64 id)
{
    struct DBMap *ht = i64db_get(htreg->htables, id);
    if (ht)
        return db_size(ht);
    return 0;
}

bool htreg_clear_hashtable(int64 id)
{
    struct DBMap *ht = i64db_get(htreg->htables, id);
    if (ht)
    {
        db_clear(ht);
        return true;
    }
    return false;
}

const struct DBData* htreg_hashtable_getvalue(int64 id, const char *key,
                                              const struct DBData *defval)
{
    struct DBMap *ht = i64db_get(htreg->htables, id);
    if (ht)
    {
        struct DBData *val = ht->get(ht, DB->str2key(key));
        return val ? val : defval;
    }
    return NULL;
}

bool htreg_hashtable_setvalue(int64 id, const char *key,
                              struct DBData value)
{
    struct DBMap *ht = i64db_get(htreg->htables, id);
    if (!ht)
        return false;

    bool keep = true;

    switch(value.type)
    {
        case DB_DATA_INT:
        case DB_DATA_UINT:
            keep = value.u.i;
            break;
        case DB_DATA_PTR:
            keep = value.u.ptr && *(char*)value.u.ptr;
            break;
    }

    if (keep)
        ht->put(ht, DB->str2key(key), value, NULL);
    else
        strdb_remove(ht, key);

    return true;
}

/**
 *   Iterators
 */
int64 htreg_create_iterator(int64 htId)
{
    struct DBMap *ht = i64db_get(htreg->htables, htId);
    if (ht)
    {
        int64 id = htreg->last_iterator_id++;
        struct DBIterator *it = db_iterator(ht);
        i64db_put(htreg->iterators, id, it);
        return id;
    }
    return 0;
}

bool htreg_destroy_iterator(int64 id)
{
    struct DBIterator *it = i64db_get(htreg->iterators, id);
    if (it)
    {
        dbi_destroy(it);
        return true;
    }
    return false;
}

bool htreg_iterator_check(int64 id)
{
    struct DBIterator *it = i64db_get(htreg->iterators, id);
    return it ? dbi_exists(it) : false;
}

bool htreg_iterator_exists(int64 id)
{
    return i64db_exists(htreg->iterators, id);
}

const char* htreg_iterator_nextkey(int64 id)
{
    struct DBIterator *it = i64db_get(htreg->iterators, id);
    if (it)
    {
        union DBKey key;
        it->next(it, &key);
        if (dbi_exists(it))
            return key.str;
    }
    return NULL;
}

/**
 * Initializer.
 */
void htreg_init(void)
{
    htreg->htables = i64db_alloc(DB_OPT_BASE);
    htreg->iterators = i64db_alloc(DB_OPT_BASE);
}

/**
 * Finalizer.
 */
void htreg_final(void)
{
    struct DBIterator *iter = db_iterator(htreg->htables);
    struct DBMap *ht;

    for(ht=dbi_first(iter); dbi_exists(iter); ht=dbi_next(iter))
        db_destroy(ht);

    dbi_destroy(iter);
    db_destroy(htreg->htables);

    // NOTE: maybe I should destroy iteratos before hashtables
    struct DBIterator *it;
    iter = db_iterator(htreg->iterators);

    for (it=dbi_first(iter); dbi_exists(iter); it=dbi_next(iter))
        dbi_destroy(it);

    dbi_destroy(iter);
    db_destroy(htreg->iterators);
}

/**
 * Interface defaults initializer.
 */
void htreg_defaults(void)
{
    htreg = &htreg_s;

    htreg->last_id = 1;
    htreg->htables = NULL;
    htreg->init = htreg_init;
    htreg->final = htreg_final;
    htreg->new_hashtable = htreg_new_hashtable;
    htreg->destroy_hashtable = htreg_destroy_hashtable;
    htreg->hashtable_exists = htreg_hashtable_exists;
    htreg->hashtable_size = htreg_hashtable_size;
    htreg->clear_hashtable = htreg_clear_hashtable;
    htreg->hashtable_getvalue = htreg_hashtable_getvalue;
    htreg->hashtable_setvalue = htreg_hashtable_setvalue;

    htreg->last_iterator_id = 1;
    htreg->iterators = NULL;
    htreg->create_iterator = htreg_create_iterator;
    htreg->destroy_iterator = htreg_destroy_iterator;
    htreg->iterator_check = htreg_iterator_check;
    htreg->iterator_exists = htreg_iterator_exists;
    htreg->iterator_nextkey = htreg_iterator_nextkey;
}