kc3-lang/SDL/src/core/linux/SDL_evdev_capabilities.h

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• Hash : aae53d59
  Author :
  Date : 2020-11-11T19:15:09
  

  evdev: Detect whether input devices are accelerometers Anything with X, Y and Z axes but no buttons is probably an accelerometer (this is the assumption made in udev). Signed-off-by: Simon McVittie <smcv@collabora.com>

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• src/core/linux/SDL_evdev_capabilities.h

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
    Copyright (C) 2020 Collabora Ltd.
  
    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 "../../SDL_internal.h"
  
  #ifndef SDL_evdev_capabilities_h_
  #define SDL_evdev_capabilities_h_
  
  #if HAVE_LIBUDEV_H || defined(SDL_JOYSTICK_LINUX)
  
  #include <linux/input.h>
  
  /* A device can be any combination of these classes */
  typedef enum
  {
      SDL_UDEV_DEVICE_UNKNOWN     = 0x0000,
      SDL_UDEV_DEVICE_MOUSE       = 0x0001,
      SDL_UDEV_DEVICE_KEYBOARD    = 0x0002,
      SDL_UDEV_DEVICE_JOYSTICK    = 0x0004,
      SDL_UDEV_DEVICE_SOUND       = 0x0008,
      SDL_UDEV_DEVICE_TOUCHSCREEN = 0x0010,
      SDL_UDEV_DEVICE_ACCELEROMETER = 0x0020
  } SDL_UDEV_deviceclass;
  
  #define BITS_PER_LONG           (sizeof(unsigned long) * 8)
  #define NBITS(x)                ((((x)-1)/BITS_PER_LONG)+1)
  #define EVDEV_OFF(x)            ((x)%BITS_PER_LONG)
  #define EVDEV_LONG(x)           ((x)/BITS_PER_LONG)
  #define test_bit(bit, array)    ((array[EVDEV_LONG(bit)] >> EVDEV_OFF(bit)) & 1)
  
  extern int SDL_EVDEV_GuessDeviceClass(unsigned long bitmask_ev[NBITS(EV_MAX)],
                                        unsigned long bitmask_abs[NBITS(ABS_MAX)],
                                        unsigned long bitmask_key[NBITS(KEY_MAX)],
                                        unsigned long bitmask_rel[NBITS(REL_MAX)]);
  
  #endif /* HAVE_LIBUDEV_H || defined(SDL_JOYSTICK_LINUX) */
  
  #endif /* SDL_evdev_capabilities_h_ */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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