ref: 50791b875552b0dc5748aa67c95776736f6ff4b7
dir: /sys/src/cmd/python/Modules/_sqlite/row.c/
/* row.c - an enhanced tuple for database rows
*
* Copyright (C) 2005-2006 Gerhard H�ring <[email protected]>
*
* 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"
#include "sqlitecompat.h"
void row_dealloc(Row* self)
{
Py_XDECREF(self->data);
Py_XDECREF(self->description);
self->ob_type->tp_free((PyObject*)self);
}
int row_init(Row* self, PyObject* args, PyObject* kwargs)
{
PyObject* data;
Cursor* cursor;
self->data = 0;
self->description = 0;
if (!PyArg_ParseTuple(args, "OO", &cursor, &data)) {
return -1;
}
if (!PyObject_IsInstance((PyObject*)cursor, (PyObject*)&CursorType)) {
PyErr_SetString(PyExc_TypeError, "instance of cursor required for first argument");
return -1;
}
if (!PyTuple_Check(data)) {
PyErr_SetString(PyExc_TypeError, "tuple required for second argument");
return -1;
}
Py_INCREF(data);
self->data = data;
Py_INCREF(cursor->description);
self->description = cursor->description;
return 0;
}
PyObject* row_subscript(Row* self, PyObject* idx)
{
long _idx;
char* key;
int nitems, i;
char* compare_key;
char* p1;
char* p2;
PyObject* item;
if (PyInt_Check(idx)) {
_idx = PyInt_AsLong(idx);
item = PyTuple_GetItem(self->data, _idx);
Py_XINCREF(item);
return item;
} else if (PyLong_Check(idx)) {
_idx = PyLong_AsLong(idx);
item = PyTuple_GetItem(self->data, _idx);
Py_XINCREF(item);
return item;
} else if (PyString_Check(idx)) {
key = PyString_AsString(idx);
nitems = PyTuple_Size(self->description);
for (i = 0; i < nitems; i++) {
compare_key = PyString_AsString(PyTuple_GET_ITEM(PyTuple_GET_ITEM(self->description, i), 0));
if (!compare_key) {
return NULL;
}
p1 = key;
p2 = compare_key;
while (1) {
if ((*p1 == (char)0) || (*p2 == (char)0)) {
break;
}
if ((*p1 | 0x20) != (*p2 | 0x20)) {
break;
}
p1++;
p2++;
}
if ((*p1 == (char)0) && (*p2 == (char)0)) {
/* 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)) {
PyErr_SetString(PyExc_ValueError, "slices not implemented, yet");
return NULL;
} else {
PyErr_SetString(PyExc_IndexError, "Index must be int or string");
return NULL;
}
}
Py_ssize_t row_length(Row* self, PyObject* args, PyObject* kwargs)
{
return PyTuple_GET_SIZE(self->data);
}
static int row_print(Row* self, FILE *fp, int flags)
{
return (&PyTuple_Type)->tp_print(self->data, fp, flags);
}
PyMappingMethods row_as_mapping = {
/* mp_length */ (lenfunc)row_length,
/* mp_subscript */ (binaryfunc)row_subscript,
/* mp_ass_subscript */ (objobjargproc)0,
};
PyTypeObject RowType = {
PyObject_HEAD_INIT(NULL)
0, /* ob_size */
MODULE_NAME ".Row", /* tp_name */
sizeof(Row), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)row_dealloc, /* tp_dealloc */
(printfunc)row_print, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* 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 */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* 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 */
(initproc)row_init, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0 /* tp_free */
};
extern int row_setup_types(void)
{
RowType.tp_new = PyType_GenericNew;
RowType.tp_as_mapping = &row_as_mapping;
return PyType_Ready(&RowType);
}