ui/events/ozone/evdev/event_device_util.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_EVENTS_OZONE_EVDEV_EVENT_DEVICE_UTIL_H_
   6 #define UI_EVENTS_OZONE_EVDEV_EVENT_DEVICE_UTIL_H_
   7
   8 #include <limits.h>
   9
  10 namespace ui {
  11
  12 #define EVDEV_LONG_BITS (CHAR_BIT * sizeof(long))
  13 #define EVDEV_BITS_TO_LONGS(x) (((x) + EVDEV_LONG_BITS - 1) / EVDEV_LONG_BITS)
  14
  15 static inline bool EvdevBitIsSet(const unsigned long* data, int bit) {
  16   return data[bit / EVDEV_LONG_BITS] & (1UL << (bit % EVDEV_LONG_BITS));
  17 }
  18
  19 static inline void EvdevSetBit(unsigned long* data, int bit) {
  20   data[bit / EVDEV_LONG_BITS] |= (1UL << (bit % EVDEV_LONG_BITS));
  21 }
  22
  23 }  // namespace ui
  24
  25 #endif  // UI_EVENTS_OZONE_EVDEV_EVENT_DEVICE_UTIL_H_