cpython/Modules/_sqlite/row.c at feature-json-array-hook · jsbueno/cpython · GitHub

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/* row.c - an enhanced tuple for database rows

* 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 "row.h"

#include "cursor.h"

#define clinic_state() (pysqlite_get_state_by_type(type))

#include "clinic/row.c.h"

#undef clinic_state

#define _pysqlite_Row_CAST(op) ((pysqlite_Row *)(op))

/*[clinic input]

module _sqlite3

class _sqlite3.Row "pysqlite_Row *" "clinic_state()->RowType"

[clinic start generated code]*/

/*[clinic end generated code: output=da39a3ee5e6b4b0d input=966c53403d7f3a40]*/

static int

row_clear(PyObject *op)

{

pysqlite_Row *self = _pysqlite_Row_CAST(op);

Py_CLEAR(self->data);

Py_CLEAR(self->description);

return 0;

}

static int

row_traverse(PyObject *op, visitproc visit, void *arg)

{

pysqlite_Row *self = _pysqlite_Row_CAST(op);

Py_VISIT(Py_TYPE(self));

Py_VISIT(self->data);

Py_VISIT(self->description);

return 0;

}

static void

pysqlite_row_dealloc(PyObject *self)

{

PyTypeObject *tp = Py_TYPE(self);

PyObject_GC_UnTrack(self);

(void)tp->tp_clear(self);

tp->tp_free(self);

Py_DECREF(tp);

}

/*[clinic input]

@classmethod

_sqlite3.Row.__new__ as pysqlite_row_new

cursor: object(type='pysqlite_Cursor *', subclass_of='clinic_state()->CursorType')

data: object(subclass_of='&PyTuple_Type')

[clinic start generated code]*/

static PyObject *

pysqlite_row_new_impl(PyTypeObject *type, pysqlite_Cursor *cursor,

PyObject *data)

/*[clinic end generated code: output=10d58b09a819a4c1 input=b9e954ca31345dbf]*/

{

pysqlite_Row *self;

assert(type != NULL && type->tp_alloc != NULL);

self = (pysqlite_Row *) type->tp_alloc(type, 0);

if (self == NULL)

return NULL;

self->data = Py_NewRef(data);

self->description = Py_NewRef(cursor->description);

return (PyObject *) self;

}

static PyObject *

pysqlite_row_item(PyObject *op, Py_ssize_t idx)

{

pysqlite_Row *self = _pysqlite_Row_CAST(op);

PyObject *item = PyTuple_GetItem(self->data, idx);

return Py_XNewRef(item);

}

static int

equal_ignore_case(PyObject *left, PyObject *right)

{

int eq = PyObject_RichCompareBool(left, right, Py_EQ);

if (eq) { /* equal or error */

return eq;

}

if (!PyUnicode_Check(left) || !PyUnicode_Check(right)) {

return 0;

}

if (!PyUnicode_IS_ASCII(left) || !PyUnicode_IS_ASCII(right)) {

return 0;

}

Py_ssize_t len = PyUnicode_GET_LENGTH(left);

if (PyUnicode_GET_LENGTH(right) != len) {

return 0;

}

const Py_UCS1 *p1 = PyUnicode_1BYTE_DATA(left);

const Py_UCS1 *p2 = PyUnicode_1BYTE_DATA(right);

for (; len; len--, p1++, p2++) {

if (Py_TOLOWER(*p1) != Py_TOLOWER(*p2)) {

return 0;

}

return 1;

}

static PyObject *

pysqlite_row_subscript(PyObject *op, PyObject *idx)

{

Py_ssize_t _idx;

pysqlite_Row *self = _pysqlite_Row_CAST(op);

if (PyLong_Check(idx)) {

_idx = PyNumber_AsSsize_t(idx, PyExc_IndexError);

if (_idx == -1 && PyErr_Occurred())

return NULL;

if (_idx < 0)

_idx += PyTuple_GET_SIZE(self->data);

PyObject *item = PyTuple_GetItem(self->data, _idx);

return Py_XNewRef(item);

} else if (PyUnicode_Check(idx)) {

if (Py_IsNone(self->description)) {

PyErr_Format(PyExc_IndexError, "No item with key %R", idx);

return NULL;

}

Py_ssize_t nitems = PyTuple_GET_SIZE(self->description);

for (Py_ssize_t i = 0; i < nitems; i++) {

PyObject *obj;

obj = PyTuple_GET_ITEM(self->description, i);

obj = PyTuple_GET_ITEM(obj, 0);

int eq = equal_ignore_case(idx, obj);

if (eq < 0) {

return NULL;

}

if (eq) {

/* found item */

PyObject *item = PyTuple_GetItem(self->data, i);

return Py_XNewRef(item);

}

PyErr_SetString(PyExc_IndexError, "No item with that key");

return NULL;

}

else if (PySlice_Check(idx)) {

return PyObject_GetItem(self->data, idx);

}

else {

PyErr_SetString(PyExc_IndexError, "Index must be int or string");

return NULL;

}

static Py_ssize_t

pysqlite_row_length(PyObject *op)

{

pysqlite_Row *self = _pysqlite_Row_CAST(op);

return PyTuple_GET_SIZE(self->data);

}

/*[clinic input]

_sqlite3.Row.keys as pysqlite_row_keys

Returns the keys of the row.

[clinic start generated code]*/

static PyObject *

pysqlite_row_keys_impl(pysqlite_Row *self)

/*[clinic end generated code: output=efe3dfb3af6edc07 input=7549a122827c5563]*/

{

PyObject *list = PyList_New(0);

if (!list) {

return NULL;

}

if (Py_IsNone(self->description)) {

return list;

}

Py_ssize_t nitems = PyTuple_GET_SIZE(self->description);

for (Py_ssize_t i = 0; i < nitems; i++) {

PyObject *descr = PyTuple_GET_ITEM(self->description, i);

PyObject *name = PyTuple_GET_ITEM(descr, 0);

if (PyList_Append(list, name) < 0) {

Py_DECREF(list);

return NULL;

}

return list;

}

static PyObject *

pysqlite_iter(PyObject *op)

{

pysqlite_Row *self = _pysqlite_Row_CAST(op);

return PyObject_GetIter(self->data);

}

static Py_hash_t

pysqlite_row_hash(PyObject *op)

{

pysqlite_Row *self = _pysqlite_Row_CAST(op);

return PyObject_Hash(self->description) ^ PyObject_Hash(self->data);

}

static PyObject *

pysqlite_row_richcompare(PyObject *op, PyObject *opother, int opid)

{

if (opid != Py_EQ && opid != Py_NE)

Py_RETURN_NOTIMPLEMENTED;

pysqlite_Row *self = _pysqlite_Row_CAST(op);

pysqlite_state *state = pysqlite_get_state_by_type(Py_TYPE(self));

if (PyObject_TypeCheck(opother, state->RowType)) {

pysqlite_Row *other = (pysqlite_Row *)opother;

int eq = PyObject_RichCompareBool(self->description, other->description, Py_EQ);

if (eq < 0) {

return NULL;

}

if (eq) {

return PyObject_RichCompare(self->data, other->data, opid);

}

return PyBool_FromLong(opid != Py_EQ);

}

Py_RETURN_NOTIMPLEMENTED;

}

static PyMethodDef row_methods[] = {

PYSQLITE_ROW_KEYS_METHODDEF

{NULL, NULL}

};

static PyType_Slot row_slots[] = {

{Py_tp_dealloc, pysqlite_row_dealloc},

{Py_tp_hash, pysqlite_row_hash},

{Py_tp_methods, row_methods},

{Py_tp_richcompare, pysqlite_row_richcompare},

{Py_tp_iter, pysqlite_iter},

{Py_mp_length, pysqlite_row_length},

{Py_mp_subscript, pysqlite_row_subscript},

{Py_sq_length, pysqlite_row_length},

{Py_sq_item, pysqlite_row_item},

{Py_tp_new, pysqlite_row_new},

{Py_tp_traverse, row_traverse},

{Py_tp_clear, row_clear},

{0, NULL},

};

static PyType_Spec row_spec = {

.name = MODULE_NAME ".Row",

.basicsize = sizeof(pysqlite_Row),

.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |

Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_IMMUTABLETYPE),

.slots = row_slots,

};

int

pysqlite_row_setup_types(PyObject *module)

{

PyObject *type = PyType_FromModuleAndSpec(module, &row_spec, NULL);

if (type == NULL) {

return -1;

}

pysqlite_state *state = pysqlite_get_state(module);

state->RowType = (PyTypeObject *)type;

return 0;

}

cpython/Modules/_sqlite/row.c at feature-json-array-hook · jsbueno/cpython · GitHub

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