File indexing completed on 2024-11-10 04:56:34

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2018 Martin Flöser <mgraesslin@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 #pragma once
 
 #include <xcb/xcb.h>
 
 #include <cstring>
 
 namespace KWin
 {
 
 class GeEventMemMover
 {
 public:
     GeEventMemMover(xcb_generic_event_t *event)
         : m_event(reinterpret_cast<xcb_ge_generic_event_t *>(event))
     {
         // xcb event structs contain stuff that wasn't on the wire, the full_sequence field
         // adds an extra 4 bytes and generic events cookie data is on the wire right after the standard 32 bytes.
         // Move this data back to have the same layout in memory as it was on the wire
         // and allow casting, overwriting the full_sequence field.
         memmove((char *)m_event + 32, (char *)m_event + 36, m_event->length * 4);
     }
     ~GeEventMemMover()
     {
         // move memory layout back, so that Qt can do the same without breaking
         memmove((char *)m_event + 36, (char *)m_event + 32, m_event->length * 4);
     }
 
     xcb_ge_generic_event_t *operator->() const
     {
         return m_event;
     }
 
 private:
     xcb_ge_generic_event_t *m_event;
 };
 
 }