lib/tdb/pytdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Python interface to tdb.
   5
   6    Copyright (C) 2004-2006 Tim Potter <tpot@samba.org>
   7    Copyright (C) 2007-2008 Jelmer Vernooij <jelmer@samba.org>
   8
   9      ** NOTE! The following LGPL license applies to the tdb
  10      ** library. This does NOT imply that all of Samba is released
  11      ** under the LGPL
  12
  13    This library is free software; you can redistribute it and/or
  14    modify it under the terms of the GNU Lesser General Public
  15    License as published by the Free Software Foundation; either
  16    version 3 of the License, or (at your option) any later version.
  17
  18    This library is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21    Lesser General Public License for more details.
  22
  23    You should have received a copy of the GNU Lesser General Public
  24    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  25 */
  26
  27 #include <Python.h>
  28 #include "replace.h"
  29 #include "system/filesys.h"
  30
  31 /* Include tdb headers */
  32 #include <tdb.h>
  33
  34 /* discard signature of 'func' in favour of 'target_sig' */
  35 #define PY_DISCARD_FUNC_SIG(target_sig, func) (target_sig)(void(*)(void))func
  36
  37 typedef struct {
  38         PyObject_HEAD
  39         TDB_CONTEXT *ctx;
  40         bool closed;
  41 } PyTdbObject;
  42
  43 static PyTypeObject PyTdb;
  44
  45 static void PyErr_SetTDBError(TDB_CONTEXT *tdb)
  46 {
  47         PyErr_SetObject(PyExc_RuntimeError,
  48                 Py_BuildValue("(i,s)", tdb_error(tdb), tdb_errorstr(tdb)));
  49 }
  50
  51 static TDB_DATA PyBytes_AsTDB_DATA(PyObject *data)
  52 {
  53         TDB_DATA ret;
  54         ret.dptr = (unsigned char *)PyBytes_AsString(data);
  55         ret.dsize = PyBytes_Size(data);
  56         return ret;
  57 }
  58
  59 static PyObject *PyBytes_FromTDB_DATA(TDB_DATA data)
  60 {
  61         if (data.dptr == NULL && data.dsize == 0) {
  62                 Py_RETURN_NONE;
  63         } else {
  64                 PyObject *ret = PyBytes_FromStringAndSize((const char *)data.dptr,
  65                                                                                                   data.dsize);
  66                 free(data.dptr);
  67                 return ret;
  68     }
  69 }
  70
  71 #define PyErr_TDB_ERROR_IS_ERR_RAISE(ret, tdb) \
  72         if (ret != 0) { \
  73                 PyErr_SetTDBError(tdb); \
  74                 return NULL; \
  75         }
  76
  77 #define PyErr_TDB_RAISE_IF_CLOSED(self) \
  78         if (self->closed) {                                             \
  79                 PyErr_SetObject(PyExc_RuntimeError,                             \
  80                                 Py_BuildValue("(i,s)", TDB_ERR_IO, "Database is already closed")); \
  81                 return NULL;                                            \
  82         }
  83
  84 #define PyErr_TDB_RAISE_RETURN_MINUS_1_IF_CLOSED(self) \
  85         if (self->closed) {                                             \
  86                 PyErr_SetObject(PyExc_RuntimeError,                             \
  87                                 Py_BuildValue("(i,s)", TDB_ERR_IO, "Database is already closed")); \
  88                 return -1;                                              \
  89         }
  90
  91 static PyObject *py_tdb_open(PyTypeObject *type, PyObject *args, PyObject *kwargs)
  92 {
  93         char *name = NULL;
  94         int hash_size = 0, tdb_flags = TDB_DEFAULT, flags = O_RDWR, mode = 0600;
  95         TDB_CONTEXT *ctx;
  96         PyTdbObject *ret;
  97         const char *_kwnames[] = { "name", "hash_size", "tdb_flags", "flags", "mode", NULL };
  98         char **kwnames = discard_const_p(char *, _kwnames);
  99
 100         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|siiii", kwnames, &name, &hash_size, &tdb_flags, &flags, &mode))
 101                 return NULL;
 102
 103         if (name == NULL) {
 104                 tdb_flags |= TDB_INTERNAL;
 105         }
 106
 107         ctx = tdb_open(name, hash_size, tdb_flags, flags, mode);
 108         if (ctx == NULL) {
 109                 PyErr_SetFromErrno(PyExc_IOError);
 110                 return NULL;
 111         }
 112
 113         ret = PyObject_New(PyTdbObject, &PyTdb);
 114         if (!ret) {
 115                 tdb_close(ctx);
 116                 return NULL;
 117         }
 118
 119         ret->ctx = ctx;
 120         ret->closed = false;
 121         return (PyObject *)ret;
 122 }
 123
 124 static PyObject *obj_transaction_cancel(PyTdbObject *self,
 125                 PyObject *Py_UNUSED(ignored))
 126 {
 127         int ret;
 128
 129         PyErr_TDB_RAISE_IF_CLOSED(self);
 130
 131         ret = tdb_transaction_cancel(self->ctx);
 132         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 133         Py_RETURN_NONE;
 134 }
 135
 136 static PyObject *obj_transaction_commit(PyTdbObject *self,
 137                 PyObject *Py_UNUSED(ignored))
 138 {
 139         int ret;
 140         PyErr_TDB_RAISE_IF_CLOSED(self);
 141         ret = tdb_transaction_commit(self->ctx);
 142         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 143         Py_RETURN_NONE;
 144 }
 145
 146 static PyObject *obj_transaction_prepare_commit(PyTdbObject *self,
 147                 PyObject *Py_UNUSED(ignored))
 148 {
 149         int ret;
 150         PyErr_TDB_RAISE_IF_CLOSED(self);
 151         ret = tdb_transaction_prepare_commit(self->ctx);
 152         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 153         Py_RETURN_NONE;
 154 }
 155
 156 static PyObject *obj_transaction_start(PyTdbObject *self,
 157                 PyObject *Py_UNUSED(ignored))
 158 {
 159         int ret;
 160         PyErr_TDB_RAISE_IF_CLOSED(self);
 161         ret = tdb_transaction_start(self->ctx);
 162         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 163         Py_RETURN_NONE;
 164 }
 165
 166 static PyObject *obj_reopen(PyTdbObject *self,
 167                 PyObject *Py_UNUSED(ignored))
 168 {
 169         int ret;
 170         PyErr_TDB_RAISE_IF_CLOSED(self);
 171         ret = tdb_reopen(self->ctx);
 172         if (ret != 0) {
 173                 self->closed = true;
 174                 PyErr_SetObject(PyExc_RuntimeError,
 175                                 Py_BuildValue("(i,s)",
 176                                               TDB_ERR_IO,
 177                                               "Failed to reopen database"));
 178                 return NULL;
 179         }
 180         Py_RETURN_NONE;
 181 }
 182
 183 static PyObject *obj_lockall(PyTdbObject *self,
 184                 PyObject *Py_UNUSED(ignored))
 185 {
 186         int ret;
 187         PyErr_TDB_RAISE_IF_CLOSED(self);
 188         ret = tdb_lockall(self->ctx);
 189         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 190         Py_RETURN_NONE;
 191 }
 192
 193 static PyObject *obj_unlockall(PyTdbObject *self,
 194                 PyObject *Py_UNUSED(ignored))
 195 {
 196         int ret;
 197         PyErr_TDB_RAISE_IF_CLOSED(self);
 198         ret = tdb_unlockall(self->ctx);
 199         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 200         Py_RETURN_NONE;
 201 }
 202
 203 static PyObject *obj_lockall_read(PyTdbObject *self,
 204                 PyObject *Py_UNUSED(ignored))
 205 {
 206         int ret;
 207         PyErr_TDB_RAISE_IF_CLOSED(self);
 208         ret = tdb_lockall_read(self->ctx);
 209         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 210         Py_RETURN_NONE;
 211 }
 212
 213 static PyObject *obj_unlockall_read(PyTdbObject *self,
 214                 PyObject *Py_UNUSED(ignored))
 215 {
 216         int ret = tdb_unlockall_read(self->ctx);
 217         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 218         Py_RETURN_NONE;
 219 }
 220
 221 static PyObject *obj_close(PyTdbObject *self, PyObject *Py_UNUSED(ignored))
 222 {
 223         int ret;
 224         if (self->closed)
 225                 Py_RETURN_NONE;
 226         ret = tdb_close(self->ctx);
 227         self->closed = true;
 228         if (ret != 0) {
 229                 PyErr_SetObject(PyExc_RuntimeError,
 230                                 Py_BuildValue("(i,s)",
 231                                               TDB_ERR_IO,
 232                                               "Failed to close database"));
 233                 return NULL;
 234         }
 235         Py_RETURN_NONE;
 236 }
 237
 238 static PyObject *obj_get(PyTdbObject *self, PyObject *args)
 239 {
 240         TDB_DATA key;
 241         PyObject *py_key;
 242
 243         PyErr_TDB_RAISE_IF_CLOSED(self);
 244
 245         if (!PyArg_ParseTuple(args, "O", &py_key))
 246                 return NULL;
 247
 248         key = PyBytes_AsTDB_DATA(py_key);
 249         if (!key.dptr)
 250                 return NULL;
 251
 252         return PyBytes_FromTDB_DATA(tdb_fetch(self->ctx, key));
 253 }
 254
 255 static PyObject *obj_append(PyTdbObject *self, PyObject *args)
 256 {
 257         TDB_DATA key, data;
 258         PyObject *py_key, *py_data;
 259         int ret;
 260
 261         PyErr_TDB_RAISE_IF_CLOSED(self);
 262
 263         if (!PyArg_ParseTuple(args, "OO", &py_key, &py_data))
 264                 return NULL;
 265
 266         key = PyBytes_AsTDB_DATA(py_key);
 267         if (!key.dptr)
 268                 return NULL;
 269         data = PyBytes_AsTDB_DATA(py_data);
 270         if (!data.dptr)
 271                 return NULL;
 272
 273         ret = tdb_append(self->ctx, key, data);
 274         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 275         Py_RETURN_NONE;
 276 }
 277
 278 static PyObject *obj_firstkey(PyTdbObject *self, PyObject *Py_UNUSED(ignored))
 279 {
 280         PyErr_TDB_RAISE_IF_CLOSED(self);
 281
 282         return PyBytes_FromTDB_DATA(tdb_firstkey(self->ctx));
 283 }
 284
 285 static PyObject *obj_nextkey(PyTdbObject *self, PyObject *args)
 286 {
 287         TDB_DATA key;
 288         PyObject *py_key;
 289         PyErr_TDB_RAISE_IF_CLOSED(self);
 290
 291         if (!PyArg_ParseTuple(args, "O", &py_key))
 292                 return NULL;
 293
 294         key = PyBytes_AsTDB_DATA(py_key);
 295         if (!key.dptr)
 296                 return NULL;
 297
 298         return PyBytes_FromTDB_DATA(tdb_nextkey(self->ctx, key));
 299 }
 300
 301 static PyObject *obj_delete(PyTdbObject *self, PyObject *args)
 302 {
 303         TDB_DATA key;
 304         PyObject *py_key;
 305         int ret;
 306         PyErr_TDB_RAISE_IF_CLOSED(self);
 307
 308         if (!PyArg_ParseTuple(args, "O", &py_key))
 309                 return NULL;
 310
 311         key = PyBytes_AsTDB_DATA(py_key);
 312         if (!key.dptr)
 313                 return NULL;
 314         ret = tdb_delete(self->ctx, key);
 315         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 316         Py_RETURN_NONE;
 317 }
 318
 319 static int obj_contains(PyTdbObject *self, PyObject *py_key)
 320 {
 321         TDB_DATA key;
 322         int ret;
 323         PyErr_TDB_RAISE_RETURN_MINUS_1_IF_CLOSED(self);
 324
 325         key = PyBytes_AsTDB_DATA(py_key);
 326         if (!key.dptr) {
 327                 PyErr_BadArgument();
 328                 return -1;
 329         }
 330         ret = tdb_exists(self->ctx, key);
 331         if (ret)
 332                 return 1;
 333         return 0;
 334 }
 335
 336 static PyObject *obj_store(PyTdbObject *self, PyObject *args)
 337 {
 338         TDB_DATA key, value;
 339         int ret;
 340         int flag = TDB_REPLACE;
 341         PyObject *py_key, *py_value;
 342
 343         PyErr_TDB_RAISE_IF_CLOSED(self);
 344
 345         if (!PyArg_ParseTuple(args, "OO|i", &py_key, &py_value, &flag))
 346                 return NULL;
 347
 348         key = PyBytes_AsTDB_DATA(py_key);
 349         if (!key.dptr)
 350                 return NULL;
 351         value = PyBytes_AsTDB_DATA(py_value);
 352         if (!value.dptr)
 353                 return NULL;
 354
 355         ret = tdb_store(self->ctx, key, value, flag);
 356         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 357         Py_RETURN_NONE;
 358 }
 359
 360 static PyObject *obj_storev(PyTdbObject *self, PyObject *args)
 361 {
 362         TDB_DATA key, *values, value;
 363         int ret;
 364         int flag = TDB_REPLACE;
 365         Py_ssize_t num_values, i;
 366         PyObject *py_key, *py_values, *py_value;
 367
 368         PyErr_TDB_RAISE_IF_CLOSED(self);
 369
 370         if (!PyArg_ParseTuple(
 371                     args, "OO!|i", &py_key, &PyList_Type, &py_values, &flag)) {
 372                 return NULL;
 373         }
 374
 375         num_values = PyList_Size(py_values);
 376
 377         key = PyBytes_AsTDB_DATA(py_key);
 378         if (key.dptr == NULL) {
 379                 return NULL;
 380         }
 381
 382         if (SSIZE_MAX/sizeof(TDB_DATA) < num_values) {
 383                 PyErr_SetFromErrno(PyExc_OverflowError);
 384                 return NULL;
 385         }
 386         values = malloc(sizeof(TDB_DATA) * num_values);
 387         if (values == NULL) {
 388                 PyErr_NoMemory();
 389                 return NULL;
 390         }
 391         for (i=0; i<num_values; i++) {
 392                 py_value = PyList_GetItem(py_values, i);
 393                 value = PyBytes_AsTDB_DATA(py_value);
 394                 if (!value.dptr) {
 395                         free(values);
 396                         return NULL;
 397                 }
 398                 values[i] = value;
 399         }
 400
 401         ret = tdb_storev(self->ctx, key, values, num_values, flag);
 402         free(values);
 403         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 404         Py_RETURN_NONE;
 405 }
 406
 407 static PyObject *obj_add_flags(PyTdbObject *self, PyObject *args)
 408 {
 409         unsigned flags;
 410
 411         PyErr_TDB_RAISE_IF_CLOSED(self);
 412
 413         if (!PyArg_ParseTuple(args, "I", &flags))
 414                 return NULL;
 415
 416         tdb_add_flags(self->ctx, flags);
 417         Py_RETURN_NONE;
 418 }
 419
 420 static PyObject *obj_remove_flags(PyTdbObject *self, PyObject *args)
 421 {
 422         unsigned flags;
 423
 424         PyErr_TDB_RAISE_IF_CLOSED(self);
 425
 426         if (!PyArg_ParseTuple(args, "I", &flags))
 427                 return NULL;
 428
 429         tdb_remove_flags(self->ctx, flags);
 430         Py_RETURN_NONE;
 431 }
 432
 433 typedef struct {
 434         PyObject_HEAD
 435         TDB_DATA current;
 436         PyTdbObject *iteratee;
 437 } PyTdbIteratorObject;
 438
 439 static PyObject *tdb_iter_next(PyTdbIteratorObject *self)
 440 {
 441         TDB_DATA current;
 442         PyObject *ret;
 443         if (self->current.dptr == NULL && self->current.dsize == 0)
 444                 return NULL;
 445         current = self->current;
 446         self->current = tdb_nextkey(self->iteratee->ctx, self->current);
 447         ret = PyBytes_FromTDB_DATA(current);
 448         return ret;
 449 }
 450
 451 static void tdb_iter_dealloc(PyTdbIteratorObject *self)
 452 {
 453         Py_DECREF(self->iteratee);
 454         PyObject_Del(self);
 455 }
 456
 457 PyTypeObject PyTdbIterator = {
 458         .tp_name = "Iterator",
 459         .tp_basicsize = sizeof(PyTdbIteratorObject),
 460         .tp_iternext = (iternextfunc)tdb_iter_next,
 461         .tp_dealloc = (destructor)tdb_iter_dealloc,
 462         .tp_flags = Py_TPFLAGS_DEFAULT,
 463         .tp_iter = PyObject_SelfIter,
 464 };
 465
 466 static PyObject *tdb_object_iter(PyTdbObject *self,
 467                 PyObject *Py_UNUSED(ignored))
 468 {
 469         PyTdbIteratorObject *ret;
 470
 471         PyErr_TDB_RAISE_IF_CLOSED(self);
 472
 473         ret = PyObject_New(PyTdbIteratorObject, &PyTdbIterator);
 474         if (!ret)
 475                 return NULL;
 476         ret->current = tdb_firstkey(self->ctx);
 477         ret->iteratee = self;
 478         Py_INCREF(self);
 479         return (PyObject *)ret;
 480 }
 481
 482 static PyObject *obj_clear(PyTdbObject *self, PyObject *Py_UNUSED(ignored))
 483 {
 484         int ret;
 485         PyErr_TDB_RAISE_IF_CLOSED(self);
 486         ret = tdb_wipe_all(self->ctx);
 487         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 488         Py_RETURN_NONE;
 489 }
 490
 491 static PyObject *obj_repack(PyTdbObject *self, PyObject *Py_UNUSED(ignored))
 492 {
 493         int ret;
 494         PyErr_TDB_RAISE_IF_CLOSED(self);
 495         ret = tdb_repack(self->ctx);
 496         PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx);
 497         Py_RETURN_NONE;
 498 }
 499
 500 static PyObject *obj_enable_seqnum(PyTdbObject *self,
 501                 PyObject *Py_UNUSED(ignored))
 502 {
 503         PyErr_TDB_RAISE_IF_CLOSED(self);
 504         tdb_enable_seqnum(self->ctx);
 505         Py_RETURN_NONE;
 506 }
 507
 508 static PyObject *obj_increment_seqnum_nonblock(PyTdbObject *self,
 509                 PyObject *Py_UNUSED(ignored))
 510 {
 511         PyErr_TDB_RAISE_IF_CLOSED(self);
 512         tdb_increment_seqnum_nonblock(self->ctx);
 513         Py_RETURN_NONE;
 514 }
 515
 516 static PyMethodDef tdb_object_methods[] = {
 517         { "transaction_cancel", (PyCFunction)obj_transaction_cancel, METH_NOARGS,
 518                 "S.transaction_cancel() -> None\n"
 519                 "Cancel the currently active transaction." },
 520         { "transaction_commit", (PyCFunction)obj_transaction_commit, METH_NOARGS,
 521                 "S.transaction_commit() -> None\n"
 522                 "Commit the currently active transaction." },
 523         { "transaction_prepare_commit", (PyCFunction)obj_transaction_prepare_commit, METH_NOARGS,
 524                 "S.transaction_prepare_commit() -> None\n"
 525                 "Prepare to commit the currently active transaction" },
 526         { "transaction_start", (PyCFunction)obj_transaction_start, METH_NOARGS,
 527                 "S.transaction_start() -> None\n"
 528                 "Start a new transaction." },
 529         { "reopen", (PyCFunction)obj_reopen, METH_NOARGS, "Reopen this file." },
 530         { "lock_all", (PyCFunction)obj_lockall, METH_NOARGS, NULL },
 531         { "unlock_all", (PyCFunction)obj_unlockall, METH_NOARGS, NULL },
 532         { "read_lock_all", (PyCFunction)obj_lockall_read, METH_NOARGS, NULL },
 533         { "read_unlock_all", (PyCFunction)obj_unlockall_read, METH_NOARGS, NULL },
 534         { "close", (PyCFunction)obj_close, METH_NOARGS, NULL },
 535         { "get", (PyCFunction)obj_get, METH_VARARGS, "S.get(key) -> value\n"
 536                 "Fetch a value." },
 537         { "append", (PyCFunction)obj_append, METH_VARARGS, "S.append(key, value) -> None\n"
 538                 "Append data to an existing key." },
 539         { "firstkey", (PyCFunction)obj_firstkey, METH_NOARGS, "S.firstkey() -> data\n"
 540                 "Return the first key in this database." },
 541         { "nextkey", (PyCFunction)obj_nextkey, METH_VARARGS, "S.nextkey(key) -> data\n"
 542                 "Return the next key in this database." },
 543         { "delete", (PyCFunction)obj_delete, METH_VARARGS, "S.delete(key) -> None\n"
 544                 "Delete an entry." },
 545         { "store", (PyCFunction)obj_store, METH_VARARGS, "S.store(key, data, flag=REPLACE) -> None"
 546                 "Store data." },
 547         { "storev", (PyCFunction)obj_storev, METH_VARARGS, "S.storev(key, data, flag=REPLACE) -> None"
 548                 "Store several data." },
 549         { "add_flags", (PyCFunction)obj_add_flags, METH_VARARGS, "S.add_flags(flags) -> None" },
 550         { "remove_flags", (PyCFunction)obj_remove_flags, METH_VARARGS, "S.remove_flags(flags) -> None" },
 551         { "keys", (PyCFunction)tdb_object_iter, METH_NOARGS, "S.keys() -> iterator" },
 552         { "clear", (PyCFunction)obj_clear, METH_NOARGS, "S.clear() -> None\n"
 553                 "Wipe the entire database." },
 554         { "repack", (PyCFunction)obj_repack, METH_NOARGS, "S.repack() -> None\n"
 555                 "Repack the entire database." },
 556         { "enable_seqnum", (PyCFunction)obj_enable_seqnum, METH_NOARGS,
 557                 "S.enable_seqnum() -> None" },
 558         { "increment_seqnum_nonblock", (PyCFunction)obj_increment_seqnum_nonblock, METH_NOARGS,
 559                 "S.increment_seqnum_nonblock() -> None" },
 560         {0}
 561 };
 562
 563 static PyObject *obj_get_hash_size(PyTdbObject *self, void *closure)
 564 {
 565         PyErr_TDB_RAISE_IF_CLOSED(self);
 566         return PyLong_FromLong(tdb_hash_size(self->ctx));
 567 }
 568
 569 static int obj_set_max_dead(PyTdbObject *self, PyObject *max_dead, void *closure)
 570 {
 571         PyErr_TDB_RAISE_RETURN_MINUS_1_IF_CLOSED(self);
 572         if (!PyLong_Check(max_dead))
 573                 return -1;
 574         tdb_set_max_dead(self->ctx, PyLong_AsLong(max_dead));
 575         return 0;
 576 }
 577
 578 static PyObject *obj_get_map_size(PyTdbObject *self, void *closure)
 579 {
 580         PyErr_TDB_RAISE_IF_CLOSED(self);
 581         return PyLong_FromLong(tdb_map_size(self->ctx));
 582 }
 583
 584 static PyObject *obj_get_freelist_size(PyTdbObject *self, void *closure)
 585 {
 586         PyErr_TDB_RAISE_IF_CLOSED(self);
 587         return PyLong_FromLong(tdb_freelist_size(self->ctx));
 588 }
 589
 590 static PyObject *obj_get_flags(PyTdbObject *self, void *closure)
 591 {
 592         PyErr_TDB_RAISE_IF_CLOSED(self);
 593         return PyLong_FromLong(tdb_get_flags(self->ctx));
 594 }
 595
 596 static PyObject *obj_get_filename(PyTdbObject *self, void *closure)
 597 {
 598         PyErr_TDB_RAISE_IF_CLOSED(self);
 599         return PyBytes_FromString(tdb_name(self->ctx));
 600 }
 601
 602 static PyObject *obj_get_seqnum(PyTdbObject *self, void *closure)
 603 {
 604         PyErr_TDB_RAISE_IF_CLOSED(self);
 605         return PyLong_FromLong(tdb_get_seqnum(self->ctx));
 606 }
 607
 608 static PyObject *obj_get_text(PyTdbObject *self, void *closure)
 609 {
 610         PyObject *mod, *cls, *inst;
 611         mod = PyImport_ImportModule("_tdb_text");
 612         if (mod == NULL)
 613                 return NULL;
 614         cls = PyObject_GetAttrString(mod, "TdbTextWrapper");
 615         if (cls == NULL) {
 616                 Py_DECREF(mod);
 617                 return NULL;
 618         }
 619         inst = PyObject_CallFunction(cls, discard_const_p(char, "O"), self);
 620         Py_DECREF(mod);
 621         Py_DECREF(cls);
 622         return inst;
 623 }
 624
 625 static PyGetSetDef tdb_object_getsetters[] = {
 626         {
 627                 .name    = discard_const_p(char, "hash_size"),
 628                 .get     = (getter)obj_get_hash_size,
 629         },
 630         {
 631                 .name    = discard_const_p(char, "map_size"),
 632                 .get     = (getter)obj_get_map_size,
 633         },
 634         {
 635                 .name    = discard_const_p(char, "freelist_size"),
 636                 .get     = (getter)obj_get_freelist_size,
 637         },
 638         {
 639                 .name    = discard_const_p(char, "flags"),
 640                 .get     = (getter)obj_get_flags,
 641         },
 642         {
 643                 .name    = discard_const_p(char, "max_dead"),
 644                 .set     = (setter)obj_set_max_dead,
 645         },
 646         {
 647                 .name    = discard_const_p(char, "filename"),
 648                 .get     = (getter)obj_get_filename,
 649                 .doc     = discard_const_p(char, "The filename of this TDB file."),
 650         },
 651         {
 652                 .name    = discard_const_p(char, "seqnum"),
 653                 .get     = (getter)obj_get_seqnum,
 654         },
 655         {
 656                 .name    = discard_const_p(char, "text"),
 657                 .get     = (getter)obj_get_text,
 658         },
 659         { .name = NULL }
 660 };
 661
 662 static PyObject *tdb_object_repr(PyTdbObject *self)
 663 {
 664         PyErr_TDB_RAISE_IF_CLOSED(self);
 665         if (tdb_get_flags(self->ctx) & TDB_INTERNAL) {
 666                 return PyUnicode_FromString("Tdb(<internal>)");
 667         } else {
 668                 return PyUnicode_FromFormat("Tdb('%s')", tdb_name(self->ctx));
 669         }
 670 }
 671
 672 static void tdb_object_dealloc(PyTdbObject *self)
 673 {
 674         if (!self->closed)
 675                 tdb_close(self->ctx);
 676         Py_TYPE(self)->tp_free(self);
 677 }
 678
 679 static PyObject *obj_getitem(PyTdbObject *self, PyObject *key)
 680 {
 681         TDB_DATA tkey, val;
 682         PyErr_TDB_RAISE_IF_CLOSED(self);
 683         if (!PyBytes_Check(key)) {
 684                 PyErr_SetString(PyExc_TypeError, "Expected bytestring as key");
 685                 return NULL;
 686         }
 687
 688         tkey.dptr = (unsigned char *)PyBytes_AsString(key);
 689         tkey.dsize = PyBytes_Size(key);
 690
 691         val = tdb_fetch(self->ctx, tkey);
 692         if (val.dptr == NULL) {
 693                 /*
 694                  * if the key doesn't exist raise KeyError(key) to be
 695                  * consistent with python dict
 696                  */
 697                 PyErr_SetObject(PyExc_KeyError, key);
 698                 return NULL;
 699         } else {
 700                 return PyBytes_FromTDB_DATA(val);
 701         }
 702 }
 703
 704 static int obj_setitem(PyTdbObject *self, PyObject *key, PyObject *value)
 705 {
 706         TDB_DATA tkey, tval;
 707         int ret;
 708         PyErr_TDB_RAISE_RETURN_MINUS_1_IF_CLOSED(self);
 709         if (!PyBytes_Check(key)) {
 710                 PyErr_SetString(PyExc_TypeError, "Expected bytestring as key");
 711                 return -1;
 712         }
 713
 714         tkey = PyBytes_AsTDB_DATA(key);
 715
 716         if (value == NULL) {
 717                 ret = tdb_delete(self->ctx, tkey);
 718         } else {
 719                 if (!PyBytes_Check(value)) {
 720                         PyErr_SetString(PyExc_TypeError, "Expected string as value");
 721                         return -1;
 722                 }
 723
 724                 tval = PyBytes_AsTDB_DATA(value);
 725
 726                 ret = tdb_store(self->ctx, tkey, tval, TDB_REPLACE);
 727         }
 728
 729         if (ret != 0) {
 730                 PyErr_SetTDBError(self->ctx);
 731                 return -1;
 732         }
 733
 734         return ret;
 735 }
 736
 737 static PyMappingMethods tdb_object_mapping = {
 738         .mp_subscript = (binaryfunc)obj_getitem,
 739         .mp_ass_subscript = (objobjargproc)obj_setitem,
 740 };
 741 static PySequenceMethods tdb_object_seq = {
 742         .sq_contains = (objobjproc)obj_contains,
 743 };
 744 static PyTypeObject PyTdb = {
 745         .tp_name = "tdb.Tdb",
 746         .tp_basicsize = sizeof(PyTdbObject),
 747         .tp_methods = tdb_object_methods,
 748         .tp_getset = tdb_object_getsetters,
 749         .tp_new = py_tdb_open,
 750         .tp_doc = "A TDB file",
 751         .tp_repr = (reprfunc)tdb_object_repr,
 752         .tp_dealloc = (destructor)tdb_object_dealloc,
 753         .tp_as_mapping = &tdb_object_mapping,
 754         .tp_as_sequence = &tdb_object_seq,
 755         .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
 756         .tp_iter = PY_DISCARD_FUNC_SIG(getiterfunc,tdb_object_iter),
 757 };
 758
 759 static PyMethodDef tdb_methods[] = {
 760         {
 761                 .ml_name  = "open",
 762                 .ml_meth  = PY_DISCARD_FUNC_SIG(PyCFunction, py_tdb_open),
 763                 .ml_flags = METH_VARARGS|METH_KEYWORDS,
 764                 .ml_doc   = "open(name, hash_size=0, tdb_flags=TDB_DEFAULT, "
 765                             "flags=O_RDWR, mode=0600)\nOpen a TDB file."
 766         },
 767         { .ml_name = NULL }
 768 };
 769
 770 #define MODULE_DOC "simple key-value database that supports multiple writers."
 771
 772 static struct PyModuleDef moduledef = {
 773     PyModuleDef_HEAD_INIT,
 774     .m_name = "tdb",
 775     .m_doc = MODULE_DOC,
 776     .m_size = -1,
 777     .m_methods = tdb_methods,
 778 };
 779
 780 PyObject* module_init(void);
 781 PyObject* module_init(void)
 782 {
 783         PyObject *m;
 784
 785         if (PyType_Ready(&PyTdb) < 0)
 786                 return NULL;
 787
 788         if (PyType_Ready(&PyTdbIterator) < 0)
 789                 return NULL;
 790
 791         m = PyModule_Create(&moduledef);
 792         if (m == NULL)
 793                 return NULL;
 794
 795         PyModule_AddIntConstant(m, "REPLACE", TDB_REPLACE);
 796         PyModule_AddIntConstant(m, "INSERT", TDB_INSERT);
 797         PyModule_AddIntConstant(m, "MODIFY", TDB_MODIFY);
 798
 799         PyModule_AddIntConstant(m, "DEFAULT", TDB_DEFAULT);
 800         PyModule_AddIntConstant(m, "CLEAR_IF_FIRST", TDB_CLEAR_IF_FIRST);
 801         PyModule_AddIntConstant(m, "INTERNAL", TDB_INTERNAL);
 802         PyModule_AddIntConstant(m, "NOLOCK", TDB_NOLOCK);
 803         PyModule_AddIntConstant(m, "NOMMAP", TDB_NOMMAP);
 804         PyModule_AddIntConstant(m, "CONVERT", TDB_CONVERT);
 805         PyModule_AddIntConstant(m, "BIGENDIAN", TDB_BIGENDIAN);
 806         PyModule_AddIntConstant(m, "NOSYNC", TDB_NOSYNC);
 807         PyModule_AddIntConstant(m, "SEQNUM", TDB_SEQNUM);
 808         PyModule_AddIntConstant(m, "VOLATILE", TDB_VOLATILE);
 809         PyModule_AddIntConstant(m, "ALLOW_NESTING", TDB_ALLOW_NESTING);
 810         PyModule_AddIntConstant(m, "DISALLOW_NESTING", TDB_DISALLOW_NESTING);
 811         PyModule_AddIntConstant(m, "INCOMPATIBLE_HASH", TDB_INCOMPATIBLE_HASH);
 812
 813         PyModule_AddStringConstant(m, "__docformat__", "restructuredText");
 814
 815         PyModule_AddStringConstant(m, "__version__", PACKAGE_VERSION);
 816
 817         Py_INCREF(&PyTdb);
 818         PyModule_AddObject(m, "Tdb", (PyObject *)&PyTdb);
 819
 820         Py_INCREF(&PyTdbIterator);
 821
 822     return m;
 823 }
 824
 825
 826 PyMODINIT_FUNC PyInit_tdb(void);
 827 PyMODINIT_FUNC PyInit_tdb(void)
 828 {
 829     return module_init();
 830 }