Repository navigation
Expand file tree
/
Copy pathmodule.c
More file actions
761 lines (679 loc) · 23.9 KB
/
Copy pathmodule.c
File metadata and controls
761 lines (679 loc) · 23.9 KB
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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
/* module.c - the module itself
*
* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "connection.h"
#include "statement.h"
#include "cursor.h"
#include "prepare_protocol.h"
#include "microprotocols.h"
#include "row.h"
#include "blob.h"
#if SQLITE_VERSION_NUMBER < 3007015
#error "SQLite 3.7.15 or higher required"
#endif
#define clinic_state() (pysqlite_get_state(module))
#include "clinic/module.c.h"
#undef clinic_state
/*[clinic input]
module _sqlite3
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=81e330492d57488e]*/
// NOTE: This must equal sqlite3.Connection.__init__ argument spec!
/*[clinic input]
_sqlite3.connect as pysqlite_connect
database: object
timeout: double = 5.0
detect_types: int = 0
isolation_level: object = NULL
check_same_thread: bool(accept={int}) = True
factory: object(c_default='(PyObject*)clinic_state()->ConnectionType') = ConnectionType
cached_statements: int = 128
uri: bool = False
Opens a connection to the SQLite database file database.
You can use ":memory:" to open a database connection to a database that resides
in RAM instead of on disk.
[clinic start generated code]*/
static PyObject *
pysqlite_connect_impl(PyObject *module, PyObject *database, double timeout,
int detect_types, PyObject *isolation_level,
int check_same_thread, PyObject *factory,
int cached_statements, int uri)
/*[clinic end generated code: output=450ac9078b4868bb input=e16914663ddf93ce]*/
{
if (isolation_level == NULL) {
isolation_level = PyUnicode_FromString("");
if (isolation_level == NULL) {
return NULL;
}
}
else {
Py_INCREF(isolation_level);
}
PyObject *res = PyObject_CallFunction(factory, "OdiOiOii", database,
timeout, detect_types,
isolation_level, check_same_thread,
factory, cached_statements, uri);
Py_DECREF(isolation_level);
return res;
}
/*[clinic input]
_sqlite3.complete_statement as pysqlite_complete_statement
statement: str
Checks if a string contains a complete SQL statement.
[clinic start generated code]*/
static PyObject *
pysqlite_complete_statement_impl(PyObject *module, const char *statement)
/*[clinic end generated code: output=e55f1ff1952df558 input=ac45d257375bb828]*/
{
if (sqlite3_complete(statement)) {
return Py_NewRef(Py_True);
} else {
return Py_NewRef(Py_False);
}
}
/*[clinic input]
_sqlite3.register_adapter as pysqlite_register_adapter
type: object(type='PyTypeObject *')
caster: object
/
Registers an adapter with sqlite3's adapter registry.
[clinic start generated code]*/
static PyObject *
pysqlite_register_adapter_impl(PyObject *module, PyTypeObject *type,
PyObject *caster)
/*[clinic end generated code: output=a287e8db18e8af23 input=b4bd87afcadc535d]*/
{
int rc;
/* a basic type is adapted; there's a performance optimization if that's not the case
* (99 % of all usages) */
if (type == &PyLong_Type || type == &PyFloat_Type
|| type == &PyUnicode_Type || type == &PyByteArray_Type) {
pysqlite_state *state = pysqlite_get_state(module);
state->BaseTypeAdapted = 1;
}
pysqlite_state *state = pysqlite_get_state(module);
PyObject *protocol = (PyObject *)state->PrepareProtocolType;
rc = pysqlite_microprotocols_add(state, type, protocol, caster);
if (rc == -1) {
return NULL;
}
Py_RETURN_NONE;
}
/*[clinic input]
_sqlite3.register_converter as pysqlite_register_converter
name as orig_name: unicode
converter as callable: object
/
Registers a converter with sqlite3.
[clinic start generated code]*/
static PyObject *
pysqlite_register_converter_impl(PyObject *module, PyObject *orig_name,
PyObject *callable)
/*[clinic end generated code: output=a2f2bfeed7230062 input=90f645419425d6c4]*/
{
PyObject* name = NULL;
PyObject* retval = NULL;
/* convert the name to upper case */
pysqlite_state *state = pysqlite_get_state(module);
name = PyObject_CallMethodNoArgs(orig_name, state->str_upper);
if (!name) {
goto error;
}
if (PyDict_SetItem(state->converters, name, callable) != 0) {
goto error;
}
retval = Py_NewRef(Py_None);
error:
Py_XDECREF(name);
return retval;
}
/*[clinic input]
_sqlite3.enable_callback_tracebacks as pysqlite_enable_callback_trace
enable: int
/
Enable or disable callback functions throwing errors to stderr.
[clinic start generated code]*/
static PyObject *
pysqlite_enable_callback_trace_impl(PyObject *module, int enable)
/*[clinic end generated code: output=4ff1d051c698f194 input=cb79d3581eb77c40]*/
{
pysqlite_state *state = pysqlite_get_state(module);
state->enable_callback_tracebacks = enable;
Py_RETURN_NONE;
}
/*[clinic input]
_sqlite3.adapt as pysqlite_adapt
obj: object
proto: object(c_default='(PyObject *)clinic_state()->PrepareProtocolType') = PrepareProtocolType
alt: object = NULL
/
Adapt given object to given protocol.
[clinic start generated code]*/
static PyObject *
pysqlite_adapt_impl(PyObject *module, PyObject *obj, PyObject *proto,
PyObject *alt)
/*[clinic end generated code: output=0c3927c5fcd23dd9 input=a53dc9993e81e15f]*/
{
pysqlite_state *state = pysqlite_get_state(module);
return pysqlite_microprotocols_adapt(state, obj, proto, alt);
}
static int converters_init(PyObject* module)
{
pysqlite_state *state = pysqlite_get_state(module);
state->converters = PyDict_New();
if (state->converters == NULL) {
return -1;
}
return PyModule_AddObjectRef(module, "converters", state->converters);
}
static int
load_functools_lru_cache(PyObject *module)
{
pysqlite_state *state = pysqlite_get_state(module);
state->lru_cache = _PyImport_GetModuleAttrString("functools", "lru_cache");
if (state->lru_cache == NULL) {
return -1;
}
return 0;
}
static PyMethodDef module_methods[] = {
PYSQLITE_ADAPT_METHODDEF
PYSQLITE_COMPLETE_STATEMENT_METHODDEF
PYSQLITE_CONNECT_METHODDEF
PYSQLITE_ENABLE_CALLBACK_TRACE_METHODDEF
PYSQLITE_REGISTER_ADAPTER_METHODDEF
PYSQLITE_REGISTER_CONVERTER_METHODDEF
{NULL, NULL}
};
/* SQLite C API result codes. See also:
* - https://www.sqlite.org/c3ref/c_abort_rollback.html
* - https://sqlite.org/changes.html#version_3_3_8
* - https://sqlite.org/changes.html#version_3_7_16
* - https://sqlite.org/changes.html#version_3_7_17
* - https://sqlite.org/changes.html#version_3_8_0
* - https://sqlite.org/changes.html#version_3_8_3
* - https://sqlite.org/changes.html#version_3_14
*
* Note: the SQLite changelogs rarely mention new result codes, so in order to
* keep the 'error_codes' table in sync with SQLite, we must manually inspect
* sqlite3.h for every release.
*
* We keep the SQLITE_VERSION_NUMBER checks in order to easily declutter the
* code when we adjust the SQLite version requirement.
*/
static const struct {
const char *name;
long value;
} error_codes[] = {
#define DECLARE_ERROR_CODE(code) {#code, code}
// Primary result code list
DECLARE_ERROR_CODE(SQLITE_ABORT),
DECLARE_ERROR_CODE(SQLITE_AUTH),
DECLARE_ERROR_CODE(SQLITE_BUSY),
DECLARE_ERROR_CODE(SQLITE_CANTOPEN),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT),
DECLARE_ERROR_CODE(SQLITE_CORRUPT),
DECLARE_ERROR_CODE(SQLITE_DONE),
DECLARE_ERROR_CODE(SQLITE_EMPTY),
DECLARE_ERROR_CODE(SQLITE_ERROR),
DECLARE_ERROR_CODE(SQLITE_FORMAT),
DECLARE_ERROR_CODE(SQLITE_FULL),
DECLARE_ERROR_CODE(SQLITE_INTERNAL),
DECLARE_ERROR_CODE(SQLITE_INTERRUPT),
DECLARE_ERROR_CODE(SQLITE_IOERR),
DECLARE_ERROR_CODE(SQLITE_LOCKED),
DECLARE_ERROR_CODE(SQLITE_MISMATCH),
DECLARE_ERROR_CODE(SQLITE_MISUSE),
DECLARE_ERROR_CODE(SQLITE_NOLFS),
DECLARE_ERROR_CODE(SQLITE_NOMEM),
DECLARE_ERROR_CODE(SQLITE_NOTADB),
DECLARE_ERROR_CODE(SQLITE_NOTFOUND),
DECLARE_ERROR_CODE(SQLITE_OK),
DECLARE_ERROR_CODE(SQLITE_PERM),
DECLARE_ERROR_CODE(SQLITE_PROTOCOL),
DECLARE_ERROR_CODE(SQLITE_RANGE),
DECLARE_ERROR_CODE(SQLITE_READONLY),
DECLARE_ERROR_CODE(SQLITE_ROW),
DECLARE_ERROR_CODE(SQLITE_SCHEMA),
DECLARE_ERROR_CODE(SQLITE_TOOBIG),
#if SQLITE_VERSION_NUMBER >= 3007017
DECLARE_ERROR_CODE(SQLITE_NOTICE),
DECLARE_ERROR_CODE(SQLITE_WARNING),
#endif
// Extended result code list
DECLARE_ERROR_CODE(SQLITE_ABORT_ROLLBACK),
DECLARE_ERROR_CODE(SQLITE_BUSY_RECOVERY),
DECLARE_ERROR_CODE(SQLITE_CANTOPEN_FULLPATH),
DECLARE_ERROR_CODE(SQLITE_CANTOPEN_ISDIR),
DECLARE_ERROR_CODE(SQLITE_CANTOPEN_NOTEMPDIR),
DECLARE_ERROR_CODE(SQLITE_CORRUPT_VTAB),
DECLARE_ERROR_CODE(SQLITE_IOERR_ACCESS),
DECLARE_ERROR_CODE(SQLITE_IOERR_BLOCKED),
DECLARE_ERROR_CODE(SQLITE_IOERR_CHECKRESERVEDLOCK),
DECLARE_ERROR_CODE(SQLITE_IOERR_CLOSE),
DECLARE_ERROR_CODE(SQLITE_IOERR_DELETE),
DECLARE_ERROR_CODE(SQLITE_IOERR_DELETE_NOENT),
DECLARE_ERROR_CODE(SQLITE_IOERR_DIR_CLOSE),
DECLARE_ERROR_CODE(SQLITE_IOERR_DIR_FSYNC),
DECLARE_ERROR_CODE(SQLITE_IOERR_FSTAT),
DECLARE_ERROR_CODE(SQLITE_IOERR_FSYNC),
DECLARE_ERROR_CODE(SQLITE_IOERR_LOCK),
DECLARE_ERROR_CODE(SQLITE_IOERR_NOMEM),
DECLARE_ERROR_CODE(SQLITE_IOERR_RDLOCK),
DECLARE_ERROR_CODE(SQLITE_IOERR_READ),
DECLARE_ERROR_CODE(SQLITE_IOERR_SEEK),
DECLARE_ERROR_CODE(SQLITE_IOERR_SHMLOCK),
DECLARE_ERROR_CODE(SQLITE_IOERR_SHMMAP),
DECLARE_ERROR_CODE(SQLITE_IOERR_SHMOPEN),
DECLARE_ERROR_CODE(SQLITE_IOERR_SHMSIZE),
DECLARE_ERROR_CODE(SQLITE_IOERR_SHORT_READ),
DECLARE_ERROR_CODE(SQLITE_IOERR_TRUNCATE),
DECLARE_ERROR_CODE(SQLITE_IOERR_UNLOCK),
DECLARE_ERROR_CODE(SQLITE_IOERR_WRITE),
DECLARE_ERROR_CODE(SQLITE_LOCKED_SHAREDCACHE),
DECLARE_ERROR_CODE(SQLITE_READONLY_CANTLOCK),
DECLARE_ERROR_CODE(SQLITE_READONLY_RECOVERY),
#if SQLITE_VERSION_NUMBER >= 3007016
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_CHECK),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_COMMITHOOK),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_FOREIGNKEY),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_FUNCTION),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_NOTNULL),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_PRIMARYKEY),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_TRIGGER),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_UNIQUE),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_VTAB),
DECLARE_ERROR_CODE(SQLITE_READONLY_ROLLBACK),
#endif
#if SQLITE_VERSION_NUMBER >= 3007017
DECLARE_ERROR_CODE(SQLITE_IOERR_MMAP),
DECLARE_ERROR_CODE(SQLITE_NOTICE_RECOVER_ROLLBACK),
DECLARE_ERROR_CODE(SQLITE_NOTICE_RECOVER_WAL),
#endif
#if SQLITE_VERSION_NUMBER >= 3008000
DECLARE_ERROR_CODE(SQLITE_BUSY_SNAPSHOT),
DECLARE_ERROR_CODE(SQLITE_IOERR_GETTEMPPATH),
DECLARE_ERROR_CODE(SQLITE_WARNING_AUTOINDEX),
#endif
#if SQLITE_VERSION_NUMBER >= 3008001
DECLARE_ERROR_CODE(SQLITE_CANTOPEN_CONVPATH),
DECLARE_ERROR_CODE(SQLITE_IOERR_CONVPATH),
#endif
#if SQLITE_VERSION_NUMBER >= 3008002
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_ROWID),
#endif
#if SQLITE_VERSION_NUMBER >= 3008003
DECLARE_ERROR_CODE(SQLITE_READONLY_DBMOVED),
#endif
#if SQLITE_VERSION_NUMBER >= 3008007
DECLARE_ERROR_CODE(SQLITE_AUTH_USER),
#endif
#if SQLITE_VERSION_NUMBER >= 3009000
DECLARE_ERROR_CODE(SQLITE_IOERR_VNODE),
#endif
#if SQLITE_VERSION_NUMBER >= 3010000
DECLARE_ERROR_CODE(SQLITE_IOERR_AUTH),
#endif
#if SQLITE_VERSION_NUMBER >= 3014001
DECLARE_ERROR_CODE(SQLITE_OK_LOAD_PERMANENTLY),
#endif
#if SQLITE_VERSION_NUMBER >= 3021000
DECLARE_ERROR_CODE(SQLITE_IOERR_BEGIN_ATOMIC),
DECLARE_ERROR_CODE(SQLITE_IOERR_COMMIT_ATOMIC),
DECLARE_ERROR_CODE(SQLITE_IOERR_ROLLBACK_ATOMIC),
#endif
#if SQLITE_VERSION_NUMBER >= 3022000
DECLARE_ERROR_CODE(SQLITE_ERROR_MISSING_COLLSEQ),
DECLARE_ERROR_CODE(SQLITE_ERROR_RETRY),
DECLARE_ERROR_CODE(SQLITE_READONLY_CANTINIT),
DECLARE_ERROR_CODE(SQLITE_READONLY_DIRECTORY),
#endif
#if SQLITE_VERSION_NUMBER >= 3024000
DECLARE_ERROR_CODE(SQLITE_CORRUPT_SEQUENCE),
DECLARE_ERROR_CODE(SQLITE_LOCKED_VTAB),
#endif
#if SQLITE_VERSION_NUMBER >= 3025000
DECLARE_ERROR_CODE(SQLITE_CANTOPEN_DIRTYWAL),
DECLARE_ERROR_CODE(SQLITE_ERROR_SNAPSHOT),
#endif
#if SQLITE_VERSION_NUMBER >= 3031000
DECLARE_ERROR_CODE(SQLITE_CANTOPEN_SYMLINK),
DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_PINNED),
DECLARE_ERROR_CODE(SQLITE_OK_SYMLINK),
#endif
#if SQLITE_VERSION_NUMBER >= 3032000
DECLARE_ERROR_CODE(SQLITE_BUSY_TIMEOUT),
DECLARE_ERROR_CODE(SQLITE_CORRUPT_INDEX),
DECLARE_ERROR_CODE(SQLITE_IOERR_DATA),
#endif
#if SQLITE_VERSION_NUMBER >= 3034000
DECLARE_ERROR_CODE(SQLITE_IOERR_CORRUPTFS),
#endif
#undef DECLARE_ERROR_CODE
{NULL, 0},
};
static int
add_error_constants(PyObject *module)
{
for (int i = 0; error_codes[i].name != NULL; i++) {
const char *name = error_codes[i].name;
const long value = error_codes[i].value;
if (PyModule_AddIntConstant(module, name, value) < 0) {
return -1;
}
}
return 0;
}
const char *
pysqlite_error_name(int rc)
{
for (int i = 0; error_codes[i].name != NULL; i++) {
if (error_codes[i].value == rc) {
return error_codes[i].name;
}
}
// No error code matched.
return NULL;
}
static int
add_integer_constants(PyObject *module) {
#define ADD_INT(ival) \
do { \
if (PyModule_AddIntConstant(module, #ival, ival) < 0) { \
return -1; \
} \
} while (0); \
ADD_INT(PARSE_DECLTYPES);
ADD_INT(PARSE_COLNAMES);
ADD_INT(SQLITE_DENY);
ADD_INT(SQLITE_IGNORE);
ADD_INT(SQLITE_CREATE_INDEX);
ADD_INT(SQLITE_CREATE_TABLE);
ADD_INT(SQLITE_CREATE_TEMP_INDEX);
ADD_INT(SQLITE_CREATE_TEMP_TABLE);
ADD_INT(SQLITE_CREATE_TEMP_TRIGGER);
ADD_INT(SQLITE_CREATE_TEMP_VIEW);
ADD_INT(SQLITE_CREATE_TRIGGER);
ADD_INT(SQLITE_CREATE_VIEW);
ADD_INT(SQLITE_DELETE);
ADD_INT(SQLITE_DROP_INDEX);
ADD_INT(SQLITE_DROP_TABLE);
ADD_INT(SQLITE_DROP_TEMP_INDEX);
ADD_INT(SQLITE_DROP_TEMP_TABLE);
ADD_INT(SQLITE_DROP_TEMP_TRIGGER);
ADD_INT(SQLITE_DROP_TEMP_VIEW);
ADD_INT(SQLITE_DROP_TRIGGER);
ADD_INT(SQLITE_DROP_VIEW);
ADD_INT(SQLITE_INSERT);
ADD_INT(SQLITE_PRAGMA);
ADD_INT(SQLITE_READ);
ADD_INT(SQLITE_SELECT);
ADD_INT(SQLITE_TRANSACTION);
ADD_INT(SQLITE_UPDATE);
ADD_INT(SQLITE_ATTACH);
ADD_INT(SQLITE_DETACH);
ADD_INT(SQLITE_ALTER_TABLE);
ADD_INT(SQLITE_REINDEX);
ADD_INT(SQLITE_ANALYZE);
ADD_INT(SQLITE_CREATE_VTABLE);
ADD_INT(SQLITE_DROP_VTABLE);
ADD_INT(SQLITE_FUNCTION);
ADD_INT(SQLITE_SAVEPOINT);
#if SQLITE_VERSION_NUMBER >= 3008003
ADD_INT(SQLITE_RECURSIVE);
#endif
// Run-time limit categories
ADD_INT(SQLITE_LIMIT_LENGTH);
ADD_INT(SQLITE_LIMIT_SQL_LENGTH);
ADD_INT(SQLITE_LIMIT_COLUMN);
ADD_INT(SQLITE_LIMIT_EXPR_DEPTH);
ADD_INT(SQLITE_LIMIT_COMPOUND_SELECT);
ADD_INT(SQLITE_LIMIT_VDBE_OP);
ADD_INT(SQLITE_LIMIT_FUNCTION_ARG);
ADD_INT(SQLITE_LIMIT_ATTACHED);
ADD_INT(SQLITE_LIMIT_LIKE_PATTERN_LENGTH);
ADD_INT(SQLITE_LIMIT_VARIABLE_NUMBER);
ADD_INT(SQLITE_LIMIT_TRIGGER_DEPTH);
#if SQLITE_VERSION_NUMBER >= 3008007
ADD_INT(SQLITE_LIMIT_WORKER_THREADS);
#endif
#undef ADD_INT
return 0;
}
/* Convert SQLite default threading mode (as set by the compile-time constant
* SQLITE_THREADSAFE) to the corresponding DB-API 2.0 (PEP 249) threadsafety
* level. */
static int
get_threadsafety(pysqlite_state *state)
{
int mode = sqlite3_threadsafe();
switch (mode) {
case 0: // Single-thread mode; threads may not share the module.
return 0;
case 1: // Serialized mode; threads may share the module,
return 3; // connections, and cursors.
case 2: // Multi-thread mode; threads may share the module, but not
return 1; // connections.
default:
PyErr_Format(state->InterfaceError,
"Unable to interpret SQLite threadsafety mode. Got %d, "
"expected 0, 1, or 2", mode);
return -1;
}
}
static int
module_traverse(PyObject *module, visitproc visit, void *arg)
{
pysqlite_state *state = pysqlite_get_state(module);
// Exceptions
Py_VISIT(state->DataError);
Py_VISIT(state->DatabaseError);
Py_VISIT(state->Error);
Py_VISIT(state->IntegrityError);
Py_VISIT(state->InterfaceError);
Py_VISIT(state->InternalError);
Py_VISIT(state->NotSupportedError);
Py_VISIT(state->OperationalError);
Py_VISIT(state->ProgrammingError);
Py_VISIT(state->Warning);
// Types
Py_VISIT(state->BlobType);
Py_VISIT(state->ConnectionType);
Py_VISIT(state->CursorType);
Py_VISIT(state->PrepareProtocolType);
Py_VISIT(state->RowType);
Py_VISIT(state->StatementType);
// Misc
Py_VISIT(state->converters);
Py_VISIT(state->lru_cache);
Py_VISIT(state->psyco_adapters);
return 0;
}
static int
module_clear(PyObject *module)
{
pysqlite_state *state = pysqlite_get_state(module);
// Exceptions
Py_CLEAR(state->DataError);
Py_CLEAR(state->DatabaseError);
Py_CLEAR(state->Error);
Py_CLEAR(state->IntegrityError);
Py_CLEAR(state->InterfaceError);
Py_CLEAR(state->InternalError);
Py_CLEAR(state->NotSupportedError);
Py_CLEAR(state->OperationalError);
Py_CLEAR(state->ProgrammingError);
Py_CLEAR(state->Warning);
// Types
Py_CLEAR(state->BlobType);
Py_CLEAR(state->ConnectionType);
Py_CLEAR(state->CursorType);
Py_CLEAR(state->PrepareProtocolType);
Py_CLEAR(state->RowType);
Py_CLEAR(state->StatementType);
// Misc
Py_CLEAR(state->converters);
Py_CLEAR(state->lru_cache);
Py_CLEAR(state->psyco_adapters);
// Interned strings
Py_CLEAR(state->str___adapt__);
Py_CLEAR(state->str___conform__);
Py_CLEAR(state->str_executescript);
Py_CLEAR(state->str_finalize);
Py_CLEAR(state->str_inverse);
Py_CLEAR(state->str_step);
Py_CLEAR(state->str_upper);
Py_CLEAR(state->str_value);
return 0;
}
static void
module_free(void *module)
{
module_clear((PyObject *)module);
}
#define ADD_TYPE(module, type) \
do { \
if (PyModule_AddType(module, type) < 0) { \
goto error; \
} \
} while (0)
#define ADD_EXCEPTION(module, state, exc, base) \
do { \
state->exc = PyErr_NewException(MODULE_NAME "." #exc, base, NULL); \
if (state->exc == NULL) { \
goto error; \
} \
ADD_TYPE(module, (PyTypeObject *)state->exc); \
} while (0)
#define ADD_INTERNED(state, string) \
do { \
PyObject *tmp = PyUnicode_InternFromString(#string); \
if (tmp == NULL) { \
goto error; \
} \
state->str_ ## string = tmp; \
} while (0)
static int
module_exec(PyObject *module)
{
if (sqlite3_libversion_number() < 3007015) {
PyErr_SetString(PyExc_ImportError, MODULE_NAME ": SQLite 3.7.15 or higher required");
return -1;
}
int rc = sqlite3_initialize();
if (rc != SQLITE_OK) {
PyErr_SetString(PyExc_ImportError, sqlite3_errstr(rc));
return -1;
}
if ((pysqlite_row_setup_types(module) < 0) ||
(pysqlite_cursor_setup_types(module) < 0) ||
(pysqlite_connection_setup_types(module) < 0) ||
(pysqlite_statement_setup_types(module) < 0) ||
(pysqlite_prepare_protocol_setup_types(module) < 0) ||
(pysqlite_blob_setup_types(module) < 0)
) {
goto error;
}
pysqlite_state *state = pysqlite_get_state(module);
ADD_TYPE(module, state->BlobType);
ADD_TYPE(module, state->ConnectionType);
ADD_TYPE(module, state->CursorType);
ADD_TYPE(module, state->PrepareProtocolType);
ADD_TYPE(module, state->RowType);
/*** Create DB-API Exception hierarchy */
ADD_EXCEPTION(module, state, Error, PyExc_Exception);
ADD_EXCEPTION(module, state, Warning, PyExc_Exception);
/* Error subclasses */
ADD_EXCEPTION(module, state, InterfaceError, state->Error);
ADD_EXCEPTION(module, state, DatabaseError, state->Error);
/* DatabaseError subclasses */
ADD_EXCEPTION(module, state, InternalError, state->DatabaseError);
ADD_EXCEPTION(module, state, OperationalError, state->DatabaseError);
ADD_EXCEPTION(module, state, ProgrammingError, state->DatabaseError);
ADD_EXCEPTION(module, state, IntegrityError, state->DatabaseError);
ADD_EXCEPTION(module, state, DataError, state->DatabaseError);
ADD_EXCEPTION(module, state, NotSupportedError, state->DatabaseError);
/* Add interned strings */
ADD_INTERNED(state, __adapt__);
ADD_INTERNED(state, __conform__);
ADD_INTERNED(state, executescript);
ADD_INTERNED(state, finalize);
ADD_INTERNED(state, inverse);
ADD_INTERNED(state, step);
ADD_INTERNED(state, upper);
ADD_INTERNED(state, value);
/* Set error constants */
if (add_error_constants(module) < 0) {
goto error;
}
/* Set integer constants */
if (add_integer_constants(module) < 0) {
goto error;
}
if (PyModule_AddStringConstant(module, "_deprecated_version", PYSQLITE_VERSION) < 0) {
goto error;
}
if (PyModule_AddStringConstant(module, "sqlite_version", sqlite3_libversion())) {
goto error;
}
int threadsafety = get_threadsafety(state);
if (threadsafety < 0) {
goto error;
}
if (PyModule_AddIntConstant(module, "threadsafety", threadsafety) < 0) {
goto error;
}
/* initialize microprotocols layer */
if (pysqlite_microprotocols_init(module) < 0) {
goto error;
}
/* initialize the default converters */
if (converters_init(module) < 0) {
goto error;
}
if (load_functools_lru_cache(module) < 0) {
goto error;
}
return 0;
error:
sqlite3_shutdown();
return -1;
}
static struct PyModuleDef_Slot module_slots[] = {
{Py_mod_exec, module_exec},
{0, NULL},
};
struct PyModuleDef _sqlite3module = {
.m_base = PyModuleDef_HEAD_INIT,
.m_name = "_sqlite3",
.m_size = sizeof(pysqlite_state),
.m_methods = module_methods,
.m_slots = module_slots,
.m_traverse = module_traverse,
.m_clear = module_clear,
.m_free = module_free,
};
PyMODINIT_FUNC
PyInit__sqlite3(void)
{
return PyModuleDef_Init(&_sqlite3module);
}