summaryrefslogtreecommitdiffstats
path: root/src/pulsecore/database-tdb.c
blob: c35fd81f81344378e1f3d1e8a71a035ddf7a645a (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
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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
/***
  This file is part of PulseAudio.

  Copyright 2009 Lennart Poettering

  PulseAudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2.1 of the
  License, or (at your option) any later version.

  PulseAudio is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with PulseAudio; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <tdb.h>

#include <pulse/xmalloc.h>
#include <pulsecore/core-util.h>
#include <pulsecore/log.h>

#include "database.h"

#define MAKE_TDB_CONTEXT(x) ((struct tdb_context*) (x))

static inline TDB_DATA* datum_to_tdb(TDB_DATA *to, const pa_datum *from) {
    pa_assert(from);
    pa_assert(to);

    to->dptr = from->data;
    to->dsize = from->size;

    return to;
}

static inline pa_datum* datum_from_tdb(pa_datum *to, const TDB_DATA *from) {
    pa_assert(from);
    pa_assert(to);

    to->data = from->dptr;
    to->size = from->dsize;

    return to;
}

void pa_datum_free(pa_datum *d) {
    pa_assert(d);

    free(d->data); /* tdb uses raw malloc/free hence we should do that here, too */
    pa_zero(d);
}

pa_database* pa_database_open(const char *fn, pa_bool_t for_write) {
    struct tdb_context *c;
    char *path;

    pa_assert(fn);

    path = pa_sprintf_malloc("%s.tdb", fn);
    errno = 0;
    c = tdb_open(path, 0, TDB_NOSYNC|TDB_NOLOCK,
                 (for_write ? O_RDWR|O_CREAT : O_RDONLY)|O_NOCTTY
#ifdef O_CLOEXEC
                 |O_CLOEXEC
#endif
                 , 0644);

    if (c)
        pa_log_debug("Opened TDB database '%s'", path);

    pa_xfree(path);

    if (!c) {
        if (errno == 0)
            errno = EIO;
        return NULL;
    }

    return (pa_database*) c;
}

void pa_database_close(pa_database *db) {
    pa_assert(db);

    tdb_close(MAKE_TDB_CONTEXT(db));
}

pa_datum* pa_database_get(pa_database *db, const pa_datum *key, pa_datum* data) {
    TDB_DATA tdb_key, tdb_data;

    pa_assert(db);
    pa_assert(key);
    pa_assert(data);

    tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key));

    return tdb_data.dptr ?
        datum_from_tdb(data, &tdb_data) :
        NULL;
}

int pa_database_set(pa_database *db, const pa_datum *key, const pa_datum* data, pa_bool_t overwrite) {
    TDB_DATA tdb_key, tdb_data;

    pa_assert(db);
    pa_assert(key);
    pa_assert(data);

    return tdb_store(MAKE_TDB_CONTEXT(db),
                      *datum_to_tdb(&tdb_key, key),
                      *datum_to_tdb(&tdb_data, data),
                     overwrite ? TDB_REPLACE : TDB_INSERT) != 0 ? -1 : 0;
}

int pa_database_unset(pa_database *db, const pa_datum *key) {
    TDB_DATA tdb_key;

    pa_assert(db);
    pa_assert(key);

    return tdb_delete(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key)) != 0 ? -1 : 0;
}

int pa_database_clear(pa_database *db) {
    pa_assert(db);

    return tdb_wipe_all(MAKE_TDB_CONTEXT(db)) != 0 ? -1 : 0;
}

signed pa_database_size(pa_database *db) {
    TDB_DATA tdb_key;
    unsigned n = 0;

    pa_assert(db);

    /* This sucks */

    tdb_key = tdb_firstkey(MAKE_TDB_CONTEXT(db));

    while (tdb_key.dptr) {
        TDB_DATA next;

        n++;

        next = tdb_nextkey(MAKE_TDB_CONTEXT(db), tdb_key);
        free(tdb_key.dptr);
        tdb_key = next;
    }

    return (signed) n;
}

pa_datum* pa_database_first(pa_database *db, pa_datum *key, pa_datum *data) {
    TDB_DATA tdb_key, tdb_data;

    pa_assert(db);
    pa_assert(key);

    tdb_key = tdb_firstkey(MAKE_TDB_CONTEXT(db));

    if (!tdb_key.dptr)
        return NULL;

    if (data) {
        tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), tdb_key);

        if (!tdb_data.dptr) {
            free(tdb_key.dptr);
            return NULL;
        }

        datum_from_tdb(data, &tdb_data);
    }

    datum_from_tdb(key, &tdb_key);

    return key;
}

pa_datum* pa_database_next(pa_database *db, const pa_datum *key, pa_datum *next, pa_datum *data) {
    TDB_DATA tdb_key, tdb_data;

    pa_assert(db);
    pa_assert(key);

    tdb_key = tdb_nextkey(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key));

    if (!tdb_key.dptr)
        return NULL;

    if (data) {
        tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), tdb_key);

        if (!tdb_data.dptr) {
            free(tdb_key.dptr);
            return NULL;
        }

        datum_from_tdb(data, &tdb_data);
    }

    datum_from_tdb(next, &tdb_key);

    return next;
}

int pa_database_sync(pa_database *db) {
    pa_assert(db);

    return 0;
}