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
|
/* 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 "cache.h"
#include "prepare_protocol.h"
#include "microprotocols.h"
#include "row.h"
#include "blob.h"
#ifdef PYSQLITE_EXPERIMENTAL
#include "backup.h"
#endif
#if SQLITE_VERSION_NUMBER >= 3003003
#define HAVE_SHARED_CACHE
#endif
/* static objects at module-level */
PyObject* pysqlite_Error, *pysqlite_Warning, *pysqlite_InterfaceError, *pysqlite_DatabaseError,
*pysqlite_InternalError, *pysqlite_OperationalError, *pysqlite_ProgrammingError,
*pysqlite_IntegrityError, *pysqlite_DataError, *pysqlite_NotSupportedError, *pysqlite_OptimizedUnicode;
PyObject* converters;
int _enable_callback_tracebacks;
int pysqlite_BaseTypeAdapted;
static PyObject* module_connect(PyObject* self, PyObject* args, PyObject*
kwargs)
{
/* Python seems to have no way of extracting a single keyword-arg at
* C-level, so this code is redundant with the one in connection_init in
* connection.c and must always be copied from there ... */
static char *kwlist[] = {"database", "timeout", "detect_types", "isolation_level", "check_same_thread", "factory", "cached_statements", NULL, NULL};
PyObject* database;
int detect_types = 0;
PyObject* isolation_level;
PyObject* factory = NULL;
int check_same_thread = 1;
int cached_statements;
double timeout = 5.0;
PyObject* result;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|diOiOi", kwlist,
&database, &timeout, &detect_types, &isolation_level, &check_same_thread, &factory, &cached_statements))
{
return NULL;
}
if (factory == NULL) {
factory = (PyObject*)&pysqlite_ConnectionType;
}
result = PyObject_Call(factory, args, kwargs);
return result;
}
PyDoc_STRVAR(module_connect_doc,
"connect(database[, timeout, isolation_level, detect_types, factory])\n\
\n\
Opens a connection to the SQLite database file *database*. You can use\n\
\":memory:\" to open a database connection to a database that resides in\n\
RAM instead of on disk.");
static PyObject* module_complete(PyObject* self, PyObject* args, PyObject*
kwargs)
{
static char *kwlist[] = {"statement", NULL, NULL};
char* statement;
PyObject* result;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", kwlist, &statement))
{
return NULL;
}
if (sqlite3_complete(statement)) {
result = Py_True;
} else {
result = Py_False;
}
Py_INCREF(result);
return result;
}
PyDoc_STRVAR(module_complete_doc,
"complete_statement(sql)\n\
\n\
Checks if a string contains a complete SQL statement. Non-standard.");
#ifdef HAVE_SHARED_CACHE
static PyObject* module_enable_shared_cache(PyObject* self, PyObject* args, PyObject*
kwargs)
{
static char *kwlist[] = {"do_enable", NULL, NULL};
int do_enable;
int rc;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i", kwlist, &do_enable))
{
return NULL;
}
rc = sqlite3_enable_shared_cache(do_enable);
if (rc != SQLITE_OK) {
PyErr_SetString(pysqlite_OperationalError, "Changing the shared_cache flag failed");
return NULL;
} else {
Py_INCREF(Py_None);
return Py_None;
}
}
PyDoc_STRVAR(module_enable_shared_cache_doc,
"enable_shared_cache(do_enable)\n\
\n\
Enable or disable shared cache mode for the calling thread.\n\
Experimental/Non-standard.");
#endif /* HAVE_SHARED_CACHE */
static PyObject* module_register_adapter(PyObject* self, PyObject* args)
{
PyTypeObject* type;
PyObject* caster;
int rc;
if (!PyArg_ParseTuple(args, "OO", &type, &caster)) {
return NULL;
}
/* a basic type is adapted; there's a performance optimization if that's not the case
* (99 % of all usages) */
if (type == &PyInt_Type || type == &PyLong_Type || type == &PyFloat_Type
|| type == &PyString_Type || type == &PyUnicode_Type || type == &PyBuffer_Type) {
pysqlite_BaseTypeAdapted = 1;
}
rc = pysqlite_microprotocols_add(type, (PyObject*)&pysqlite_PrepareProtocolType, caster);
if (rc == -1)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(module_register_adapter_doc,
"register_adapter(type, callable)\n\
\n\
Registers an adapter with pysqlite's adapter registry. Non-standard.");
static PyObject* module_register_converter(PyObject* self, PyObject* args)
{
PyObject* orig_name;
PyObject* name = NULL;
PyObject* callable;
PyObject* retval = NULL;
if (!PyArg_ParseTuple(args, "SO", &orig_name, &callable)) {
return NULL;
}
/* convert the name to upper case */
name = PyObject_CallMethod(orig_name, "upper", "");
if (!name) {
goto error;
}
if (PyDict_SetItem(converters, name, callable) != 0) {
goto error;
}
Py_INCREF(Py_None);
retval = Py_None;
error:
Py_XDECREF(name);
return retval;
}
PyDoc_STRVAR(module_register_converter_doc,
"register_converter(typename, callable)\n\
\n\
Registers a converter with pysqlite. Non-standard.");
static PyObject* enable_callback_tracebacks(PyObject* self, PyObject* args)
{
if (!PyArg_ParseTuple(args, "i", &_enable_callback_tracebacks)) {
return NULL;
}
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(enable_callback_tracebacks_doc,
"enable_callback_tracebacks(flag)\n\
\n\
Enable or disable callback functions throwing errors to stderr.");
static void converters_init(PyObject* dict)
{
converters = PyDict_New();
if (!converters) {
return;
}
PyDict_SetItemString(dict, "converters", converters);
}
static PyMethodDef module_methods[] = {
{"connect", (PyCFunction)module_connect,
METH_VARARGS | METH_KEYWORDS, module_connect_doc},
{"complete_statement", (PyCFunction)module_complete,
METH_VARARGS | METH_KEYWORDS, module_complete_doc},
#ifdef HAVE_SHARED_CACHE
{"enable_shared_cache", (PyCFunction)module_enable_shared_cache,
METH_VARARGS | METH_KEYWORDS, module_enable_shared_cache_doc},
#endif
{"register_adapter", (PyCFunction)module_register_adapter,
METH_VARARGS, module_register_adapter_doc},
{"register_converter", (PyCFunction)module_register_converter,
METH_VARARGS, module_register_converter_doc},
{"adapt", (PyCFunction)pysqlite_adapt, METH_VARARGS,
pysqlite_adapt_doc},
{"enable_callback_tracebacks", (PyCFunction)enable_callback_tracebacks,
METH_VARARGS, enable_callback_tracebacks_doc},
{NULL, NULL}
};
struct _IntConstantPair {
char* constant_name;
int constant_value;
};
typedef struct _IntConstantPair IntConstantPair;
static IntConstantPair _int_constants[] = {
{"PARSE_DECLTYPES", PARSE_DECLTYPES},
{"PARSE_COLNAMES", PARSE_COLNAMES},
{"SQLITE_OK", SQLITE_OK},
{"SQLITE_DENY", SQLITE_DENY},
{"SQLITE_IGNORE", SQLITE_IGNORE},
{"SQLITE_CREATE_INDEX", SQLITE_CREATE_INDEX},
{"SQLITE_CREATE_TABLE", SQLITE_CREATE_TABLE},
{"SQLITE_CREATE_TEMP_INDEX", SQLITE_CREATE_TEMP_INDEX},
{"SQLITE_CREATE_TEMP_TABLE", SQLITE_CREATE_TEMP_TABLE},
{"SQLITE_CREATE_TEMP_TRIGGER", SQLITE_CREATE_TEMP_TRIGGER},
{"SQLITE_CREATE_TEMP_VIEW", SQLITE_CREATE_TEMP_VIEW},
{"SQLITE_CREATE_TRIGGER", SQLITE_CREATE_TRIGGER},
{"SQLITE_CREATE_VIEW", SQLITE_CREATE_VIEW},
{"SQLITE_DELETE", SQLITE_DELETE},
{"SQLITE_DROP_INDEX", SQLITE_DROP_INDEX},
{"SQLITE_DROP_TABLE", SQLITE_DROP_TABLE},
{"SQLITE_DROP_TEMP_INDEX", SQLITE_DROP_TEMP_INDEX},
{"SQLITE_DROP_TEMP_TABLE", SQLITE_DROP_TEMP_TABLE},
{"SQLITE_DROP_TEMP_TRIGGER", SQLITE_DROP_TEMP_TRIGGER},
{"SQLITE_DROP_TEMP_VIEW", SQLITE_DROP_TEMP_VIEW},
{"SQLITE_DROP_TRIGGER", SQLITE_DROP_TRIGGER},
{"SQLITE_DROP_VIEW", SQLITE_DROP_VIEW},
{"SQLITE_INSERT", SQLITE_INSERT},
{"SQLITE_PRAGMA", SQLITE_PRAGMA},
{"SQLITE_READ", SQLITE_READ},
{"SQLITE_SELECT", SQLITE_SELECT},
{"SQLITE_TRANSACTION", SQLITE_TRANSACTION},
{"SQLITE_UPDATE", SQLITE_UPDATE},
{"SQLITE_ATTACH", SQLITE_ATTACH},
{"SQLITE_DETACH", SQLITE_DETACH},
#if SQLITE_VERSION_NUMBER >= 3002001
{"SQLITE_ALTER_TABLE", SQLITE_ALTER_TABLE},
{"SQLITE_REINDEX", SQLITE_REINDEX},
#endif
#if SQLITE_VERSION_NUMBER >= 3003000
{"SQLITE_ANALYZE", SQLITE_ANALYZE},
#endif
{(char*)NULL, 0}
};
PyMODINIT_FUNC init_sqlite(void)
{
PyObject *module, *dict;
PyObject *tmp_obj;
int i;
module = Py_InitModule("pysqlcipher._sqlite", module_methods);
if (!module ||
(pysqlite_row_setup_types() < 0) ||
(pysqlite_cursor_setup_types() < 0) ||
(pysqlite_connection_setup_types() < 0) ||
(pysqlite_cache_setup_types() < 0) ||
(pysqlite_statement_setup_types() < 0) ||
#ifdef PYSQLITE_EXPERIMENTAL
(pysqlite_backup_setup_types() < 0) ||
#endif
(pysqlite_blob_setup_types() < 0) ||
(pysqlite_prepare_protocol_setup_types() < 0)
) {
return;
}
Py_INCREF(&pysqlite_ConnectionType);
PyModule_AddObject(module, "Connection", (PyObject*) &pysqlite_ConnectionType);
Py_INCREF(&pysqlite_CursorType);
PyModule_AddObject(module, "Cursor", (PyObject*) &pysqlite_CursorType);
Py_INCREF(&pysqlite_CacheType);
PyModule_AddObject(module, "Statement", (PyObject*)&pysqlite_StatementType);
Py_INCREF(&pysqlite_StatementType);
PyModule_AddObject(module, "Cache", (PyObject*) &pysqlite_CacheType);
Py_INCREF(&pysqlite_PrepareProtocolType);
PyModule_AddObject(module, "PrepareProtocol", (PyObject*) &pysqlite_PrepareProtocolType);
Py_INCREF(&pysqlite_RowType);
PyModule_AddObject(module, "Row", (PyObject*) &pysqlite_RowType);
if (!(dict = PyModule_GetDict(module))) {
goto error;
}
/*** Create DB-API Exception hierarchy */
if (!(pysqlite_Error = PyErr_NewException(MODULE_NAME ".Error", PyExc_StandardError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "Error", pysqlite_Error);
if (!(pysqlite_Warning = PyErr_NewException(MODULE_NAME ".Warning", PyExc_StandardError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "Warning", pysqlite_Warning);
/* Error subclasses */
if (!(pysqlite_InterfaceError = PyErr_NewException(MODULE_NAME ".InterfaceError", pysqlite_Error, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "InterfaceError", pysqlite_InterfaceError);
if (!(pysqlite_DatabaseError = PyErr_NewException(MODULE_NAME ".DatabaseError", pysqlite_Error, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "DatabaseError", pysqlite_DatabaseError);
/* pysqlite_DatabaseError subclasses */
if (!(pysqlite_InternalError = PyErr_NewException(MODULE_NAME ".InternalError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "InternalError", pysqlite_InternalError);
if (!(pysqlite_OperationalError = PyErr_NewException(MODULE_NAME ".OperationalError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "OperationalError", pysqlite_OperationalError);
if (!(pysqlite_ProgrammingError = PyErr_NewException(MODULE_NAME ".ProgrammingError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "ProgrammingError", pysqlite_ProgrammingError);
if (!(pysqlite_IntegrityError = PyErr_NewException(MODULE_NAME ".IntegrityError", pysqlite_DatabaseError,NULL))) {
goto error;
}
PyDict_SetItemString(dict, "IntegrityError", pysqlite_IntegrityError);
if (!(pysqlite_DataError = PyErr_NewException(MODULE_NAME ".DataError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "DataError", pysqlite_DataError);
if (!(pysqlite_NotSupportedError = PyErr_NewException(MODULE_NAME ".NotSupportedError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "NotSupportedError", pysqlite_NotSupportedError);
/* We just need "something" unique for pysqlite_OptimizedUnicode. It does not really
* need to be a string subclass. Just anything that can act as a special
* marker for us. So I pulled PyCell_Type out of my magic hat.
*/
Py_INCREF((PyObject*)&PyCell_Type);
pysqlite_OptimizedUnicode = (PyObject*)&PyCell_Type;
PyDict_SetItemString(dict, "OptimizedUnicode", pysqlite_OptimizedUnicode);
/* Set integer constants */
for (i = 0; _int_constants[i].constant_name != 0; i++) {
tmp_obj = PyInt_FromLong(_int_constants[i].constant_value);
if (!tmp_obj) {
goto error;
}
PyDict_SetItemString(dict, _int_constants[i].constant_name, tmp_obj);
Py_DECREF(tmp_obj);
}
if (!(tmp_obj = PyString_FromString(PYSQLITE_VERSION))) {
goto error;
}
PyDict_SetItemString(dict, "version", tmp_obj);
Py_DECREF(tmp_obj);
if (!(tmp_obj = PyString_FromString(sqlite3_libversion()))) {
goto error;
}
PyDict_SetItemString(dict, "sqlite_version", tmp_obj);
Py_DECREF(tmp_obj);
/* initialize microprotocols layer */
pysqlite_microprotocols_init(dict);
/* initialize the default converters */
converters_init(dict);
_enable_callback_tracebacks = 0;
pysqlite_BaseTypeAdapted = 0;
/* Original comment from _bsddb.c in the Python core. This is also still
* needed nowadays for Python 2.3/2.4.
*
* PyEval_InitThreads is called here due to a quirk in python 1.5
* - 2.2.1 (at least) according to Russell Williamson <merel@wt.net>:
* The global interpreter lock is not initialized until the first
* thread is created using thread.start_new_thread() or fork() is
* called. that would cause the ALLOW_THREADS here to segfault due
* to a null pointer reference if no threads or child processes
* have been created. This works around that and is a no-op if
* threads have already been initialized.
* (see pybsddb-users mailing list post on 2002-08-07)
*/
#ifdef WITH_THREAD
PyEval_InitThreads();
#endif
error:
if (PyErr_Occurred())
{
PyErr_SetString(PyExc_ImportError, "pysqlcipher._sqlite: init failed");
}
}
|