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/*
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*
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* Copyright (C) 2006 MeVis Research GmbH All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Contact information: MeVis Research GmbH, Universitaetsallee 29,
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* 28359 Bremen, Germany or:
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*
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* http://www.mevis.de
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*
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*/
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//----------------------------------------------------------------------------------
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/*!
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// \file PythonQtSlot.cpp
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// \author Florian Link
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// \author Last changed by $Author: florian $
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// \date 2006-05
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*/
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//----------------------------------------------------------------------------------
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#include "PythonQt.h"
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#include "PythonQtSlot.h"
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#include "PythonQtInstanceWrapper.h"
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#include "PythonQtClassInfo.h"
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#include "PythonQtMisc.h"
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#include "PythonQtConversion.h"
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#include <iostream>
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#define PYTHONQT_MAX_ARGS 32
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bool PythonQtCallSlot(PythonQtClassInfo* classInfo, QObject* objectToCall, PyObject* args, bool strict, PythonQtSlotInfo* info, void* firstArgument, PyObject** pythonReturnValue, void** directReturnValuePointer)
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{
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static unsigned int recursiveEntry = 0;
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if (directReturnValuePointer) {
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*directReturnValuePointer = NULL;
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}
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// store the current storage position, so that we can get back to this state after a slot is called
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// (do this locally, so that we have all positions on the stack
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PythonQtValueStoragePosition globalValueStoragePos;
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PythonQtValueStoragePosition globalPtrStoragePos;
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PythonQtValueStoragePosition globalVariantStoragePos;
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PythonQtConv::global_valueStorage.getPos(globalValueStoragePos);
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PythonQtConv::global_ptrStorage.getPos(globalPtrStoragePos);
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PythonQtConv::global_variantStorage.getPos(globalVariantStoragePos);
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recursiveEntry++;
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// the arguments that are passed to qt_metacall
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void* argList[PYTHONQT_MAX_ARGS];
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PyObject* result = NULL;
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int argc = info->parameterCount();
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const QList<PythonQtSlotInfo::ParameterInfo>& params = info->parameters();
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const PythonQtSlotInfo::ParameterInfo& returnValueParam = params.at(0);
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// set return argument to NULL
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argList[0] = NULL;
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bool ok = true;
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bool skipFirst = false;
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if (info->isInstanceDecorator()) {
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skipFirst = true;
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// for decorators on CPP objects, we take the cpp ptr, for QObjects we take the QObject pointer
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void* arg1 = firstArgument;
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if (!arg1) {
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arg1 = objectToCall;
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}
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if (arg1) {
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// upcast to correct parent class
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arg1 = ((char*)arg1)+info->upcastingOffset();
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}
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argList[1] = &arg1;
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if (ok) {
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for (int i = 2; i<argc && ok; i++) {
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const PythonQtSlotInfo::ParameterInfo& param = params.at(i);
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//std::cout << param.name.data() << " " << param.typeId << (param.isPointer?"*":"") << (param.isConst?" const":"") << std::endl;
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argList[i] = PythonQtConv::ConvertPythonToQt(param, PyTuple_GET_ITEM(args, i-2), strict, classInfo);
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if (argList[i]==NULL) {
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ok = false;
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break;
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}
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}
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}
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} else {
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for (int i = 1; i<argc && ok; i++) {
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const PythonQtSlotInfo::ParameterInfo& param = params.at(i);
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//std::cout << param.name.data() << " " << param.typeId << (param.isPointer?"*":"") << (param.isConst?" const":"") << std::endl;
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argList[i] = PythonQtConv::ConvertPythonToQt(param, PyTuple_GET_ITEM(args, i-1), strict, classInfo);
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if (argList[i]==NULL) {
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ok = false;
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break;
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}
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}
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}
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if (ok) {
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bool returnValueIsEnum = false;
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// parameters are ok, now create the qt return value which is assigned to by metacall
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if (returnValueParam.typeId != QMetaType::Void) {
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// extra handling of enum return value
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if (!returnValueParam.isPointer && returnValueParam.enumWrapper) {
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// create enum return value
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PythonQtValueStorage_ADD_VALUE(PythonQtConv::global_valueStorage, long, 0, argList[0]);
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returnValueIsEnum = true;
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} else {
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// create empty default value for the return value
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if (!directReturnValuePointer) {
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// create empty default value for the return value
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argList[0] = PythonQtConv::CreateQtReturnValue(returnValueParam);
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if (argList[0]==NULL) {
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// return value could not be created, maybe we have a registered class with a default constructor, so that we can construct the pythonqt wrapper object and
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// pass its internal pointer
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PythonQtClassInfo* info = PythonQt::priv()->getClassInfo(returnValueParam.name);
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if (info && info->pythonQtClassWrapper()) {
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PyObject* emptyTuple = PyTuple_New(0);
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// 1) default construct an empty object as python object (owned by PythonQt), by calling the meta class with empty arguments
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result = PyObject_Call((PyObject*)info->pythonQtClassWrapper(), emptyTuple, NULL);
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if (result) {
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argList[0] = ((PythonQtInstanceWrapper*)result)->_wrappedPtr;
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}
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Py_DECREF(emptyTuple);
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}
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}
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} else {
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// we can use our pointer directly!
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argList[0] = directReturnValuePointer;
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}
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}
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}
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// invoke the slot via metacall
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(info->decorator()?info->decorator():objectToCall)->qt_metacall(QMetaObject::InvokeMetaMethod, info->slotIndex(), argList);
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// handle the return value (which in most cases still needs to be converted to a Python object)
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if (argList[0] || returnValueParam.typeId == QMetaType::Void) {
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if (directReturnValuePointer) {
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result = NULL;
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} else {
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if (!returnValueIsEnum) {
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// the resulting object maybe present already, because we created it above at 1)...
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if (!result) {
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result = PythonQtConv::ConvertQtValueToPython(returnValueParam, argList[0]);
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}
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} else {
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result = PyInt_FromLong(*((unsigned int*)argList[0]));
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}
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}
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} else {
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QString e = QString("Called ") + info->fullSignature() + ", return type '" + returnValueParam.name + "' is ignored because it is unknown to PythonQt. Probably you should register it using qRegisterMetaType() or add a default constructor decorator to the class.";
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PyErr_SetString(PyExc_ValueError, e.toLatin1().data());
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result = NULL;
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}
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}
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recursiveEntry--;
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// reset the parameter storage position to the stored pos to "pop" the parameter stack
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PythonQtConv::global_valueStorage.setPos(globalValueStoragePos);
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PythonQtConv::global_ptrStorage.setPos(globalPtrStoragePos);
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PythonQtConv::global_variantStorage.setPos(globalVariantStoragePos);
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*pythonReturnValue = result;
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// NOTE: it is important to only return here, otherwise the stack will not be popped!!!
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return result || (directReturnValuePointer && *directReturnValuePointer);
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}
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//-----------------------------------------------------------------------------------
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static PythonQtSlotFunctionObject *pythonqtslot_free_list = NULL;
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PyObject *PythonQtSlotFunction_Call(PyObject *func, PyObject *args, PyObject *kw)
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{
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PythonQtSlotFunctionObject* f = (PythonQtSlotFunctionObject*)func;
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PythonQtSlotInfo* info = f->m_ml;
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if (PyObject_TypeCheck(f->m_self, &PythonQtInstanceWrapper_Type)) {
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PythonQtInstanceWrapper* self = (PythonQtInstanceWrapper*) f->m_self;
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return PythonQtSlotFunction_CallImpl(self->classInfo(), self->_obj, info, args, kw, self->_wrappedPtr);
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} else if (f->m_self->ob_type == &PythonQtClassWrapper_Type) {
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PythonQtClassWrapper* type = (PythonQtClassWrapper*) f->m_self;
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if (info->isClassDecorator()) {
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return PythonQtSlotFunction_CallImpl(type->classInfo(), NULL, info, args, kw);
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} else {
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// otherwise, it is an unbound call and we have an instanceDecorator or normal slot...
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Py_ssize_t argc = PyTuple_Size(args);
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if (argc>0) {
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PyObject* firstArg = PyTuple_GET_ITEM(args, 0);
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if (PyObject_TypeCheck(firstArg, (PyTypeObject*)&PythonQtInstanceWrapper_Type)
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&& ((PythonQtInstanceWrapper*)firstArg)->classInfo()->inherits(type->classInfo())) {
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PythonQtInstanceWrapper* self = (PythonQtInstanceWrapper*)firstArg;
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// strip the first argument...
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PyObject* newargs = PyTuple_GetSlice(args, 1, argc);
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PyObject* result = PythonQtSlotFunction_CallImpl(self->classInfo(), self->_obj, info, newargs, kw, self->_wrappedPtr);
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Py_DECREF(newargs);
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return result;
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} else {
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// first arg is not of correct type!
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QString error = "slot " + info->fullSignature() + " requires " + type->classInfo()->className() + " instance as first argument, got " + firstArg->ob_type->tp_name;
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PyErr_SetString(PyExc_ValueError, error.toLatin1().data());
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return NULL;
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}
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} else {
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// wrong number of args
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QString error = "slot " + info->fullSignature() + " requires " + type->classInfo()->className() + " instance as first argument.";
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PyErr_SetString(PyExc_ValueError, error.toLatin1().data());
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return NULL;
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}
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}
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}
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return NULL;
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}
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PyObject *PythonQtSlotFunction_CallImpl(PythonQtClassInfo* classInfo, QObject* objectToCall, PythonQtSlotInfo* info, PyObject *args, PyObject * /*kw*/, void* firstArg, void** directReturnValuePointer)
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{
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int argc = PyTuple_Size(args);
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#ifdef PYTHONQT_DEBUG
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std::cout << "called " << info->metaMethod()->typeName() << " " << info->metaMethod()->signature() << std::endl;
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#endif
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PyObject* r = NULL;
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bool ok = false;
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if (directReturnValuePointer) {
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*directReturnValuePointer = NULL;
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}
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if (info->nextInfo()) {
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// overloaded slot call, try on all slots with strict conversion first
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bool strict = true;
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PythonQtSlotInfo* i = info;
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while (i) {
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bool skipFirst = i->isInstanceDecorator();
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if (i->parameterCount()-1-(skipFirst?1:0) == argc) {
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PyErr_Clear();
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ok = PythonQtCallSlot(classInfo, objectToCall, args, strict, i, firstArg, &r, directReturnValuePointer);
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if (PyErr_Occurred() || ok) break;
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}
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i = i->nextInfo();
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if (!i) {
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if (strict) {
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|
|
// one more run without being strict
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|
strict = false;
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i = info;
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|
}
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}
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}
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if (!ok && !PyErr_Occurred()) {
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QString e = QString("Could not find matching overload for given arguments:\n" + PythonQtConv::PyObjGetString(args) + "\n The following slots are available:\n");
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PythonQtSlotInfo* i = info;
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while (i) {
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e += QString(i->fullSignature()) + "\n";
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i = i->nextInfo();
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}
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PyErr_SetString(PyExc_ValueError, e.toLatin1().data());
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}
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} else {
|
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// simple (non-overloaded) slot call
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bool skipFirst = info->isInstanceDecorator();
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if (info->parameterCount()-1-(skipFirst?1:0) == argc) {
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PyErr_Clear();
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ok = PythonQtCallSlot(classInfo, objectToCall, args, false, info, firstArg, &r, directReturnValuePointer);
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if (!ok && !PyErr_Occurred()) {
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QString e = QString("Called ") + info->fullSignature() + " with wrong arguments: " + PythonQtConv::PyObjGetString(args);
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PyErr_SetString(PyExc_ValueError, e.toLatin1().data());
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}
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} else {
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QString e = QString("Called ") + info->fullSignature() + " with wrong number of arguments: " + PythonQtConv::PyObjGetString(args);
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PyErr_SetString(PyExc_ValueError, e.toLatin1().data());
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|
}
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}
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return r;
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}
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|
PyObject *
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PythonQtSlotFunction_New(PythonQtSlotInfo *ml, PyObject *self, PyObject *module)
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|
|
{
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|
|
PythonQtSlotFunctionObject *op;
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op = pythonqtslot_free_list;
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|
if (op != NULL) {
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pythonqtslot_free_list = (PythonQtSlotFunctionObject *)(op->m_self);
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PyObject_INIT(op, &PythonQtSlotFunction_Type);
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|
}
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else {
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|
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op = PyObject_GC_New(PythonQtSlotFunctionObject, &PythonQtSlotFunction_Type);
|
|
|
if (op == NULL)
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|
return NULL;
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|
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}
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|
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op->m_ml = ml;
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Py_XINCREF(self);
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|
op->m_self = self;
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Py_XINCREF(module);
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|
op->m_module = module;
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|
|
PyObject_GC_Track(op);
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|
|
return (PyObject *)op;
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|
|
}
|
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|
|
|
PythonQtSlotInfo*
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|
|
PythonQtSlotFunction_GetSlotInfo(PyObject *op)
|
|
|
{
|
|
|
if (!PythonQtSlotFunction_Check(op)) {
|
|
|
PyErr_BadInternalCall();
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|
|
return NULL;
|
|
|
}
|
|
|
return ((PythonQtSlotFunctionObject *)op) -> m_ml;
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|
|
}
|
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|
|
|
PyObject *
|
|
|
PythonQtSlotFunction_GetSelf(PyObject *op)
|
|
|
{
|
|
|
if (!PythonQtSlotFunction_Check(op)) {
|
|
|
PyErr_BadInternalCall();
|
|
|
return NULL;
|
|
|
}
|
|
|
return ((PythonQtSlotFunctionObject *)op) -> m_self;
|
|
|
}
|
|
|
|
|
|
/* Methods (the standard built-in methods, that is) */
|
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|
|
|
static void
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|
|
meth_dealloc(PythonQtSlotFunctionObject *m)
|
|
|
{
|
|
|
PyObject_GC_UnTrack(m);
|
|
|
Py_XDECREF(m->m_self);
|
|
|
Py_XDECREF(m->m_module);
|
|
|
m->m_self = (PyObject *)pythonqtslot_free_list;
|
|
|
pythonqtslot_free_list = m;
|
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
|
meth_get__doc__(PythonQtSlotFunctionObject * /*m*/, void * /*closure*/)
|
|
|
{
|
|
|
Py_INCREF(Py_None);
|
|
|
return Py_None;
|
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
|
meth_get__name__(PythonQtSlotFunctionObject *m, void * /*closure*/)
|
|
|
{
|
|
|
return PyString_FromString(m->m_ml->metaMethod()->signature());
|
|
|
}
|
|
|
|
|
|
static int
|
|
|
meth_traverse(PythonQtSlotFunctionObject *m, visitproc visit, void *arg)
|
|
|
{
|
|
|
int err;
|
|
|
if (m->m_self != NULL) {
|
|
|
err = visit(m->m_self, arg);
|
|
|
if (err)
|
|
|
return err;
|
|
|
}
|
|
|
if (m->m_module != NULL) {
|
|
|
err = visit(m->m_module, arg);
|
|
|
if (err)
|
|
|
return err;
|
|
|
}
|
|
|
return 0;
|
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
|
meth_get__self__(PythonQtSlotFunctionObject *m, void * /*closure*/)
|
|
|
{
|
|
|
PyObject *self;
|
|
|
if (PyEval_GetRestricted()) {
|
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
|
"method.__self__ not accessible in restricted mode");
|
|
|
return NULL;
|
|
|
}
|
|
|
self = m->m_self;
|
|
|
if (self == NULL)
|
|
|
self = Py_None;
|
|
|
Py_INCREF(self);
|
|
|
return self;
|
|
|
}
|
|
|
|
|
|
static PyGetSetDef meth_getsets [] = {
|
|
|
{"__doc__", (getter)meth_get__doc__, NULL, NULL},
|
|
|
{"__name__", (getter)meth_get__name__, NULL, NULL},
|
|
|
{"__self__", (getter)meth_get__self__, NULL, NULL},
|
|
|
{NULL, NULL, NULL,NULL},
|
|
|
};
|
|
|
|
|
|
#if PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION < 6
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#define PY_WRITE_RESTRICTED WRITE_RESTRICTED
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#endif
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#define OFF(x) offsetof(PythonQtSlotFunctionObject, x)
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static PyMemberDef meth_members[] = {
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{"__module__", T_OBJECT, OFF(m_module), PY_WRITE_RESTRICTED},
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{NULL}
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};
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static PyObject *
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meth_repr(PythonQtSlotFunctionObject *f)
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{
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if (f->m_self->ob_type == &PythonQtClassWrapper_Type) {
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PythonQtClassWrapper* self = (PythonQtClassWrapper*) f->m_self;
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return PyString_FromFormat("<unbound qt slot %s of %s type>",
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f->m_ml->slotName().data(),
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self->classInfo()->className());
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} else {
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return PyString_FromFormat("<qt slot %s of %s instance at %p>",
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f->m_ml->slotName().data(),
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f->m_self->ob_type->tp_name,
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f->m_self);
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}
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}
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static int
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meth_compare(PythonQtSlotFunctionObject *a, PythonQtSlotFunctionObject *b)
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{
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if (a->m_self != b->m_self)
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return (a->m_self < b->m_self) ? -1 : 1;
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if (a->m_ml == b->m_ml)
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return 0;
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if (strcmp(a->m_ml->metaMethod()->signature(), b->m_ml->metaMethod()->signature()) < 0)
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return -1;
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else
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return 1;
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}
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static long
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meth_hash(PythonQtSlotFunctionObject *a)
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{
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long x,y;
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if (a->m_self == NULL)
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x = 0;
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else {
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x = PyObject_Hash(a->m_self);
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if (x == -1)
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return -1;
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}
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y = _Py_HashPointer((void*)(a->m_ml));
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if (y == -1)
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return -1;
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x ^= y;
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if (x == -1)
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x = -2;
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return x;
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}
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PyTypeObject PythonQtSlotFunction_Type = {
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PyObject_HEAD_INIT(&PyType_Type)
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0,
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"builtin_qt_slot",
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sizeof(PythonQtSlotFunctionObject),
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0,
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(destructor)meth_dealloc, /* tp_dealloc */
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0, /* tp_print */
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0, /* tp_getattr */
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0, /* tp_setattr */
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(cmpfunc)meth_compare, /* tp_compare */
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(reprfunc)meth_repr, /* 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)meth_hash, /* tp_hash */
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PythonQtSlotFunction_Call, /* tp_call */
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0, /* tp_str */
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PyObject_GenericGetAttr, /* 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_HAVE_GC,/* tp_flags */
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0, /* tp_doc */
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(traverseproc)meth_traverse, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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0, /* tp_methods */
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meth_members, /* tp_members */
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meth_getsets, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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};
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/* Clear out the free list */
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void
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PythonQtSlotFunction_Fini(void)
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{
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while (pythonqtslot_free_list) {
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PythonQtSlotFunctionObject *v = pythonqtslot_free_list;
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pythonqtslot_free_list = (PythonQtSlotFunctionObject *)(v->m_self);
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PyObject_GC_Del(v);
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}
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}
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