cpython/Modules/_sqlite/module.c at main · python/cpython · GitHub

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/* module.c - the module itself

* 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.

#ifndef Py_BUILD_CORE_BUILTIN

# define Py_BUILD_CORE_MODULE 1

#endif

#include "connection.h"

#include "statement.h"

#include "cursor.h"

#include "prepare_protocol.h"

#include "microprotocols.h"

#include "row.h"

#include "blob.h"

#include "util.h"

#if SQLITE_VERSION_NUMBER < 3015002

#error "SQLite 3.15.2 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]*/

* We create 'clinic/_sqlite3.connect.c.h' in connection.c, in order to

* keep the signatures of sqlite3.Connection.__init__ and

* sqlite3.connect() synchronised.

#include "clinic/_sqlite3.connect.c.h"

static PyObject *

pysqlite_connect(PyObject *module, PyObject *const *args, Py_ssize_t nargsf,

PyObject *kwnames)

{

pysqlite_state *state = pysqlite_get_state(module);

PyObject *factory = (PyObject *)state->ConnectionType;

Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);

if (nargs > 1) {

PyErr_Format(PyExc_TypeError,

"connect() takes at most 1 positional arguments (%zd given)", nargs);

return NULL;

}

if (kwnames != NULL) {

for (Py_ssize_t i = 0; i < PyTuple_GET_SIZE(kwnames); i++) {

PyObject *item = PyTuple_GET_ITEM(kwnames, i); // borrowed ref.

if (PyUnicode_EqualToUTF8(item, "factory")) {

factory = args[nargs + i];

break;

}

return PyObject_Vectorcall(factory, args, nargsf, kwnames);

}

/*[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 *')

adapter as caster: object

[clinic start generated code]*/

static PyObject *

pysqlite_register_adapter_impl(PyObject *module, PyTypeObject *type,

PyObject *caster)

/*[clinic end generated code: output=a287e8db18e8af23 input=29a5e0f213030242]*/

{

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

typename as orig_name: unicode

converter as callable: object

[clinic start generated code]*/

static PyObject *

pysqlite_register_converter_impl(PyObject *module, PyObject *orig_name,

PyObject *callable)

/*[clinic end generated code: output=a2f2bfeed7230062 input=159a444971b40378]*/

{

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_ImportModuleAttrString("functools", "lru_cache");

if (state->lru_cache == NULL) {

return -1;

}

return 0;

}

static PyMethodDef module_methods[] = {

PYSQLITE_ADAPT_METHODDEF

PYSQLITE_COMPLETE_STATEMENT_METHODDEF

{"connect", _PyCFunction_CAST(pysqlite_connect), METH_FASTCALL|METH_KEYWORDS, pysqlite_connect__doc__},

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

* 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),

DECLARE_ERROR_CODE(SQLITE_NOTICE),

DECLARE_ERROR_CODE(SQLITE_WARNING),

// 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),

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),

DECLARE_ERROR_CODE(SQLITE_IOERR_MMAP),

DECLARE_ERROR_CODE(SQLITE_NOTICE_RECOVER_ROLLBACK),

DECLARE_ERROR_CODE(SQLITE_NOTICE_RECOVER_WAL),

DECLARE_ERROR_CODE(SQLITE_BUSY_SNAPSHOT),

DECLARE_ERROR_CODE(SQLITE_IOERR_GETTEMPPATH),

DECLARE_ERROR_CODE(SQLITE_WARNING_AUTOINDEX),

DECLARE_ERROR_CODE(SQLITE_CANTOPEN_CONVPATH),

DECLARE_ERROR_CODE(SQLITE_IOERR_CONVPATH),

DECLARE_ERROR_CODE(SQLITE_CONSTRAINT_ROWID),

DECLARE_ERROR_CODE(SQLITE_READONLY_DBMOVED),

DECLARE_ERROR_CODE(SQLITE_AUTH_USER),

DECLARE_ERROR_CODE(SQLITE_IOERR_VNODE),

DECLARE_ERROR_CODE(SQLITE_IOERR_AUTH),

DECLARE_ERROR_CODE(SQLITE_OK_LOAD_PERMANENTLY),

#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_keyword_tuple(PyObject *module)

{

#if SQLITE_VERSION_NUMBER >= 3024000

int count = sqlite3_keyword_count();

PyObject *keywords = PyTuple_New(count);

if (keywords == NULL) {

return -1;

}

for (int i = 0; i < count; i++) {

const char *keyword;

int size;

int result = sqlite3_keyword_name(i, &keyword, &size);

if (result != SQLITE_OK) {

pysqlite_state *state = pysqlite_get_state(module);

set_error_from_code(state, result);

goto error;

}

PyObject *kwd = PyUnicode_FromStringAndSize(keyword, size);

if (!kwd) {

goto error;

}

PyTuple_SET_ITEM(keywords, i, kwd);

}

return PyModule_Add(module, "SQLITE_KEYWORDS", keywords);

error:

Py_DECREF(keywords);

return -1;

#else

return 0;

#endif

}

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);

ADD_INT(SQLITE_RECURSIVE);

// 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);

ADD_INT(SQLITE_LIMIT_WORKER_THREADS);

* Database connection configuration options.

* See https://www.sqlite.org/c3ref/c_dbconfig_defensive.html

ADD_INT(SQLITE_DBCONFIG_ENABLE_FKEY);

ADD_INT(SQLITE_DBCONFIG_ENABLE_TRIGGER);

ADD_INT(SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER);

ADD_INT(SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION);

#if SQLITE_VERSION_NUMBER >= 3016000

ADD_INT(SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE);

#endif

#if SQLITE_VERSION_NUMBER >= 3020000

ADD_INT(SQLITE_DBCONFIG_ENABLE_QPSG);

#endif

#if SQLITE_VERSION_NUMBER >= 3022000

ADD_INT(SQLITE_DBCONFIG_TRIGGER_EQP);

#endif

#if SQLITE_VERSION_NUMBER >= 3024000

ADD_INT(SQLITE_DBCONFIG_RESET_DATABASE);

#endif

#if SQLITE_VERSION_NUMBER >= 3026000

ADD_INT(SQLITE_DBCONFIG_DEFENSIVE);

#endif

#if SQLITE_VERSION_NUMBER >= 3028000

ADD_INT(SQLITE_DBCONFIG_WRITABLE_SCHEMA);

#endif

#if SQLITE_VERSION_NUMBER >= 3029000

ADD_INT(SQLITE_DBCONFIG_DQS_DDL);

ADD_INT(SQLITE_DBCONFIG_DQS_DML);

ADD_INT(SQLITE_DBCONFIG_LEGACY_ALTER_TABLE);

#endif

#if SQLITE_VERSION_NUMBER >= 3030000

ADD_INT(SQLITE_DBCONFIG_ENABLE_VIEW);

#endif

#if SQLITE_VERSION_NUMBER >= 3031000

ADD_INT(SQLITE_DBCONFIG_LEGACY_FILE_FORMAT);

ADD_INT(SQLITE_DBCONFIG_TRUSTED_SCHEMA);

#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)

{

(void)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() < 3015002) {

PyErr_SetString(PyExc_ImportError, MODULE_NAME ": SQLite 3.15.2 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 (add_keyword_tuple(module) < 0) {

goto error;

}

if (PyModule_AddStringConstant(module, "sqlite_version", sqlite3_libversion())) {

goto error;

}

if (PyModule_AddIntMacro(module, LEGACY_TRANSACTION_CONTROL) < 0) {

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:

return -1;

}

static struct PyModuleDef_Slot module_slots[] = {

_Py_ABI_SLOT,

{Py_mod_exec, module_exec},

{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},

{Py_mod_gil, Py_MOD_GIL_NOT_USED},

{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);

}

cpython/Modules/_sqlite/module.c at main · python/cpython · GitHub

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cpython/Modules/_sqlite/module.c at main · python/cpython · GitHub

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