/* Performs very basic validation on an incoming SQL string.
* Returns a new reference to a str instance on success; NULL on failure,
* after having set an exception.
*/
PyObject *
curs_validate_sql_basic(cursorObject *self, PyObject *sql)
{
PyObject *rv = NULL;
PyObject *comp = NULL;
int iscomp;
if (!sql || !PyObject_IsTrue(sql)) {
psyco_set_error(ProgrammingError, self,
"can't execute an empty query");
goto exit;
}
if (Bytes_Check(sql)) {
/* Necessary for ref-count symmetry with the unicode case: */
Py_INCREF(sql);
rv = sql;
}
else if (PyUnicode_Check(sql)) {
if (!(rv = conn_encode(self->conn, sql))) { goto exit; }
}
else if (0 != (iscomp = _curs_is_composible(sql))) {
if (iscomp < 0) { goto exit; }
if (!(comp = PyObject_CallMethod(sql, "as_string", "O", self->conn))) {
goto exit;
}
if (Bytes_Check(comp)) {
rv = comp;
comp = NULL;
}
else if (PyUnicode_Check(comp)) {
if (!(rv = conn_encode(self->conn, comp))) { goto exit; }
}
else {
PyErr_Format(PyExc_TypeError,
"as_string() should return a string: got %s instead",
Py_TYPE(comp)->tp_name);
goto exit;
}
}
else {
/* the is not unicode or string, raise an error */
PyErr_Format(PyExc_TypeError,
"argument 1 must be a string or unicode object: got %s instead",
Py_TYPE(sql)->tp_name);
goto exit;
}
exit:
Py_XDECREF(comp);
return rv;
}
PyObject *
microprotocol_getquoted(PyObject *obj, connectionObject *conn)
{
PyObject *res = NULL;
PyObject *prepare = NULL;
PyObject *adapted;
if (!(adapted = microprotocols_adapt(obj, (PyObject*)&isqlquoteType, NULL))) {
goto exit;
}
Dprintf("microprotocol_getquoted: adapted to %s",
Py_TYPE(adapted)->tp_name);
/* if requested prepare the object passing it the connection */
if (conn) {
if ((prepare = PyObject_GetAttrString(adapted, "prepare"))) {
res = PyObject_CallFunctionObjArgs(
prepare, (PyObject *)conn, NULL);
if (res) {
Py_DECREF(res);
res = NULL;
} else {
goto exit;
}
}
else {
/* adapted.prepare not found */
PyErr_Clear();
}
}
/* call the getquoted method on adapted (that should exist because we
adapted to the right protocol) */
res = PyObject_CallMethod(adapted, "getquoted", NULL);
/* Convert to bytes. */
if (res && PyUnicode_CheckExact(res)) {
PyObject *b;
b = conn_encode(conn, res);
Py_DECREF(res);
res = b;
}
exit:
Py_XDECREF(adapted);
Py_XDECREF(prepare);
/* we return res with one extra reference, the caller shall free it */
return res;
}