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279 lines
9.3 KiB
279 lines
9.3 KiB
4 months ago
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/* row.c - an enhanced tuple for database rows
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*
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* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
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*
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* This file is part of pysqlite.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#include "row.h"
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#include "cursor.h"
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void pysqlite_row_dealloc(pysqlite_Row* self)
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{
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Py_XDECREF(self->data);
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Py_XDECREF(self->description);
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Py_TYPE(self)->tp_free((PyObject*)self);
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}
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static PyObject *
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pysqlite_row_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
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{
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pysqlite_Row *self;
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PyObject* data;
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pysqlite_Cursor* cursor;
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assert(type != NULL && type->tp_alloc != NULL);
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if (!_PyArg_NoKeywords("Row", kwargs))
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return NULL;
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if (!PyArg_ParseTuple(args, "OO", &cursor, &data))
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return NULL;
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if (!PyObject_TypeCheck((PyObject*)cursor, &pysqlite_CursorType)) {
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PyErr_SetString(PyExc_TypeError, "instance of cursor required for first argument");
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return NULL;
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}
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if (!PyTuple_Check(data)) {
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PyErr_SetString(PyExc_TypeError, "tuple required for second argument");
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return NULL;
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}
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self = (pysqlite_Row *) type->tp_alloc(type, 0);
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if (self == NULL)
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return NULL;
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Py_INCREF(data);
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self->data = data;
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Py_INCREF(cursor->description);
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self->description = cursor->description;
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return (PyObject *) self;
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}
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PyObject* pysqlite_row_item(pysqlite_Row* self, Py_ssize_t idx)
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{
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PyObject* item = PyTuple_GetItem(self->data, idx);
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Py_XINCREF(item);
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return item;
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}
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static int
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equal_ignore_case(PyObject *left, PyObject *right)
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{
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int eq = PyObject_RichCompareBool(left, right, Py_EQ);
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if (eq) { /* equal or error */
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return eq;
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}
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if (!PyUnicode_Check(left) || !PyUnicode_Check(right)) {
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return 0;
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}
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if (!PyUnicode_IS_ASCII(left) || !PyUnicode_IS_ASCII(right)) {
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return 0;
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}
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Py_ssize_t len = PyUnicode_GET_LENGTH(left);
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if (PyUnicode_GET_LENGTH(right) != len) {
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return 0;
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}
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const Py_UCS1 *p1 = PyUnicode_1BYTE_DATA(left);
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const Py_UCS1 *p2 = PyUnicode_1BYTE_DATA(right);
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for (; len; len--, p1++, p2++) {
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if (Py_TOLOWER(*p1) != Py_TOLOWER(*p2)) {
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return 0;
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}
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}
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return 1;
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}
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PyObject* pysqlite_row_subscript(pysqlite_Row* self, PyObject* idx)
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{
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Py_ssize_t _idx;
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Py_ssize_t nitems, i;
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PyObject* item;
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if (PyLong_Check(idx)) {
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_idx = PyNumber_AsSsize_t(idx, PyExc_IndexError);
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if (_idx == -1 && PyErr_Occurred())
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return NULL;
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if (_idx < 0)
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_idx += PyTuple_GET_SIZE(self->data);
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item = PyTuple_GetItem(self->data, _idx);
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Py_XINCREF(item);
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return item;
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} else if (PyUnicode_Check(idx)) {
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nitems = PyTuple_Size(self->description);
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for (i = 0; i < nitems; i++) {
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PyObject *obj;
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obj = PyTuple_GET_ITEM(self->description, i);
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obj = PyTuple_GET_ITEM(obj, 0);
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int eq = equal_ignore_case(idx, obj);
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if (eq < 0) {
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return NULL;
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}
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if (eq) {
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/* found item */
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item = PyTuple_GetItem(self->data, i);
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Py_INCREF(item);
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return item;
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}
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}
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PyErr_SetString(PyExc_IndexError, "No item with that key");
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return NULL;
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}
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else if (PySlice_Check(idx)) {
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return PyObject_GetItem(self->data, idx);
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}
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else {
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PyErr_SetString(PyExc_IndexError, "Index must be int or string");
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return NULL;
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}
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}
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static Py_ssize_t
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pysqlite_row_length(pysqlite_Row* self)
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{
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return PyTuple_GET_SIZE(self->data);
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}
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PyObject* pysqlite_row_keys(pysqlite_Row* self, PyObject *Py_UNUSED(ignored))
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{
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PyObject* list;
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Py_ssize_t nitems, i;
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list = PyList_New(0);
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if (!list) {
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return NULL;
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}
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nitems = PyTuple_Size(self->description);
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for (i = 0; i < nitems; i++) {
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if (PyList_Append(list, PyTuple_GET_ITEM(PyTuple_GET_ITEM(self->description, i), 0)) != 0) {
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Py_DECREF(list);
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return NULL;
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}
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}
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return list;
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}
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static PyObject* pysqlite_iter(pysqlite_Row* self)
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{
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return PyObject_GetIter(self->data);
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}
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static Py_hash_t pysqlite_row_hash(pysqlite_Row *self)
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{
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return PyObject_Hash(self->description) ^ PyObject_Hash(self->data);
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}
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static PyObject* pysqlite_row_richcompare(pysqlite_Row *self, PyObject *_other, int opid)
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{
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if (opid != Py_EQ && opid != Py_NE)
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Py_RETURN_NOTIMPLEMENTED;
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if (PyObject_TypeCheck(_other, &pysqlite_RowType)) {
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pysqlite_Row *other = (pysqlite_Row *)_other;
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int eq = PyObject_RichCompareBool(self->description, other->description, Py_EQ);
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if (eq < 0) {
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return NULL;
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}
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if (eq) {
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return PyObject_RichCompare(self->data, other->data, opid);
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}
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return PyBool_FromLong(opid != Py_EQ);
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}
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Py_RETURN_NOTIMPLEMENTED;
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}
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PyMappingMethods pysqlite_row_as_mapping = {
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/* mp_length */ (lenfunc)pysqlite_row_length,
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/* mp_subscript */ (binaryfunc)pysqlite_row_subscript,
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/* mp_ass_subscript */ (objobjargproc)0,
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};
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static PySequenceMethods pysqlite_row_as_sequence = {
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/* sq_length */ (lenfunc)pysqlite_row_length,
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/* sq_concat */ 0,
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/* sq_repeat */ 0,
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/* sq_item */ (ssizeargfunc)pysqlite_row_item,
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};
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static PyMethodDef pysqlite_row_methods[] = {
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{"keys", (PyCFunction)pysqlite_row_keys, METH_NOARGS,
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PyDoc_STR("Returns the keys of the row.")},
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{NULL, NULL}
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};
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PyTypeObject pysqlite_RowType = {
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PyVarObject_HEAD_INIT(NULL, 0)
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MODULE_NAME ".Row", /* tp_name */
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sizeof(pysqlite_Row), /* tp_basicsize */
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0, /* tp_itemsize */
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(destructor)pysqlite_row_dealloc, /* tp_dealloc */
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0, /* tp_vectorcall_offset */
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0, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_as_async */
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0, /* tp_repr */
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0, /* tp_as_number */
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0, /* tp_as_sequence */
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0, /* tp_as_mapping */
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(hashfunc)pysqlite_row_hash, /* tp_hash */
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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /* tp_flags */
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0, /* tp_doc */
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(traverseproc)0, /* tp_traverse */
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0, /* tp_clear */
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(richcmpfunc)pysqlite_row_richcompare, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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(getiterfunc)pysqlite_iter, /* tp_iter */
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0, /* tp_iternext */
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pysqlite_row_methods, /* tp_methods */
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0, /* tp_members */
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0, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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0, /* tp_descr_get */
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0, /* tp_descr_set */
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0, /* tp_dictoffset */
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0, /* tp_init */
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0, /* tp_alloc */
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0, /* tp_new */
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0 /* tp_free */
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};
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extern int pysqlite_row_setup_types(void)
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{
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pysqlite_RowType.tp_new = pysqlite_row_new;
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pysqlite_RowType.tp_as_mapping = &pysqlite_row_as_mapping;
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pysqlite_RowType.tp_as_sequence = &pysqlite_row_as_sequence;
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return PyType_Ready(&pysqlite_RowType);
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}
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