cpython/Modules/_sqlite/row.c at master · python-emscripten/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.

#include "row.h"

#include "cursor.h"

void pysqlite_row_dealloc(pysqlite_Row* self)

{

Py_XDECREF(self->data);

Py_XDECREF(self->description);

Py_TYPE(self)->tp_free((PyObject*)self);

}

static PyObject *

pysqlite_row_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)

{

pysqlite_Row *self;

PyObject* data;

pysqlite_Cursor* cursor;

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

if (!_PyArg_NoKeywords("Row", kwargs))

return NULL;

if (!PyArg_ParseTuple(args, "OO", &cursor, &data))

return NULL;

if (!PyObject_TypeCheck((PyObject*)cursor, &pysqlite_CursorType)) {

PyErr_SetString(PyExc_TypeError, "instance of cursor required for first argument");

return NULL;

}

if (!PyTuple_Check(data)) {

PyErr_SetString(PyExc_TypeError, "tuple required for second argument");

return NULL;

}

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

if (self == NULL)

return NULL;

Py_INCREF(data);

self->data = data;

Py_INCREF(cursor->description);

self->description = cursor->description;

return (PyObject *) self;

}

PyObject* pysqlite_row_item(pysqlite_Row* self, Py_ssize_t idx)

{

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

Py_XINCREF(item);

return 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;

}

PyObject* pysqlite_row_subscript(pysqlite_Row* self, PyObject* idx)

{

Py_ssize_t _idx;

Py_ssize_t nitems, i;

PyObject* item;

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);

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

Py_XINCREF(item);

return item;

} else if (PyUnicode_Check(idx)) {

nitems = PyTuple_Size(self->description);

for (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 */

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

Py_INCREF(item);

return 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(pysqlite_Row* self)

{

return PyTuple_GET_SIZE(self->data);

}

PyObject* pysqlite_row_keys(pysqlite_Row* self, PyObject *Py_UNUSED(ignored))

{

PyObject* list;

Py_ssize_t nitems, i;

list = PyList_New(0);

if (!list) {

return NULL;

}

nitems = PyTuple_Size(self->description);

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

if (PyList_Append(list, PyTuple_GET_ITEM(PyTuple_GET_ITEM(self->description, i), 0)) != 0) {

Py_DECREF(list);

return NULL;

}

return list;

}

static PyObject* pysqlite_iter(pysqlite_Row* self)

{

return PyObject_GetIter(self->data);

}

static Py_hash_t pysqlite_row_hash(pysqlite_Row *self)

{

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

}

static PyObject* pysqlite_row_richcompare(pysqlite_Row *self, PyObject *_other, int opid)

{

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

Py_RETURN_NOTIMPLEMENTED;

if (PyObject_TypeCheck(_other, &pysqlite_RowType)) {

pysqlite_Row *other = (pysqlite_Row *)_other;

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;

}

PyMappingMethods pysqlite_row_as_mapping = {

/* mp_length */ (lenfunc)pysqlite_row_length,

/* mp_subscript */ (binaryfunc)pysqlite_row_subscript,

/* mp_ass_subscript */ (objobjargproc)0,

};

static PySequenceMethods pysqlite_row_as_sequence = {

/* sq_length */ (lenfunc)pysqlite_row_length,

/* sq_concat */ 0,

/* sq_repeat */ 0,

/* sq_item */ (ssizeargfunc)pysqlite_row_item,

};

static PyMethodDef pysqlite_row_methods[] = {

{"keys", (PyCFunction)pysqlite_row_keys, METH_NOARGS,

PyDoc_STR("Returns the keys of the row.")},

{NULL, NULL}

};

PyTypeObject pysqlite_RowType = {

PyVarObject_HEAD_INIT(NULL, 0)

MODULE_NAME ".Row", /* tp_name */

sizeof(pysqlite_Row), /* tp_basicsize */

0, /* tp_itemsize */

(destructor)pysqlite_row_dealloc, /* tp_dealloc */

0, /* tp_vectorcall_offset */

0, /* tp_getattr */

0, /* tp_setattr */

0, /* tp_as_async */

0, /* tp_repr */

0, /* tp_as_number */

0, /* tp_as_sequence */

0, /* tp_as_mapping */

(hashfunc)pysqlite_row_hash, /* tp_hash */

0, /* tp_call */

0, /* tp_str */

0, /* tp_getattro */

0, /* tp_setattro */

0, /* tp_as_buffer */

Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /* tp_flags */

0, /* tp_doc */

(traverseproc)0, /* tp_traverse */

0, /* tp_clear */

(richcmpfunc)pysqlite_row_richcompare, /* tp_richcompare */

0, /* tp_weaklistoffset */

(getiterfunc)pysqlite_iter, /* tp_iter */

0, /* tp_iternext */

pysqlite_row_methods, /* tp_methods */

0, /* tp_members */

0, /* tp_getset */

0, /* tp_base */

0, /* tp_dict */

0, /* tp_descr_get */

0, /* tp_descr_set */

0, /* tp_dictoffset */

0, /* tp_init */

0, /* tp_alloc */

0, /* tp_new */

0 /* tp_free */

};

extern int pysqlite_row_setup_types(void)

{

pysqlite_RowType.tp_new = pysqlite_row_new;

pysqlite_RowType.tp_as_mapping = &pysqlite_row_as_mapping;

pysqlite_RowType.tp_as_sequence = &pysqlite_row_as_sequence;

return PyType_Ready(&pysqlite_RowType);

}

cpython/Modules/_sqlite/row.c at master · python-emscripten/cpython · GitHub

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