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307 lines (269 loc) · 8.36 KB
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/* row.c - an enhanced tuple for database rows
*
* Copyright (C) 2005-2010 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.
*/
#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);
Py_hash_t hash_description = PyObject_Hash(self->description);
if (hash_description == -1) {
return -1;
}
Py_hash_t hash_data = PyObject_Hash(self->data);
if (hash_data == -1) {
return -1;
}
return hash_description ^ hash_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;
}
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