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/***
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>
/* Some versions of tdb lack inclusion of signal.h in the header files but use sigatomic_t */
#include <signal.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;
}
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