gfx/src/X11UndefineNone.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 // The header <X11/X.h> defines "None" as a macro that expands to "0L".
   8 // This is terrible because many enumerations have an enumerator named "None".
   9 // To work around this, we undefine the macro "None", and define a replacement
  10 // macro named "X11None".
  11 // Include this header after including X11 headers, where necessary.
  12 #ifdef None
  13 #  undef None
  14 #  define X11None 0L
  15 // <X11/X.h> also defines "RevertToNone" as a macro that expands to "(int)None".
  16 // Since we are undefining "None", that stops working. To keep it working,
  17 // we undefine "RevertToNone" and redefine it in terms of "X11None".
  18 #  ifdef RevertToNone
  19 #    undef RevertToNone
  20 #    define RevertToNone (int)X11None
  21 #  endif
  22 #endif
  23
  24 // X11 also defines Always, which conflicts with some style system enum variant
  25 // names, so get rid of that too, given we don't use it anywhere else.
  26 #ifdef Always
  27 #  undef Always
  28 #endif
  29
  30 // And Complex...
  31 #ifdef Complex
  32 #  undef Complex
  33 #endif
  34
  35 #ifdef CurrentTime
  36 #  undef CurrentTime
  37 #  define X11CurrentTime 0L
  38 #endif
  39
  40 // X11/Xlib.h also defines True and False, get rid of those too for
  41 // the same reasons as above...
  42 #ifdef True
  43 #  undef True
  44 #  define X11True 1
  45 #endif
  46 #ifdef False
  47 #  undef False
  48 #  define X11False 0
  49 #endif