HidUtils.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
#ifndef HIDUTILS_H
#define HIDUTILS_H
 
#include "pedigree/kernel/Spinlock.h"
#include "pedigree/kernel/processor/types.h"
 
enum HidDeviceType { Keyboard, Mouse, Joystick, UnknownDevice = ~0 };
 
namespace HidUtils {
class InputState {
 public:
  InputState();
  ~InputState();
  InputState(const InputState&) = delete;
  InputState& operator=(const InputState&) = delete;
 
 private:
  friend void sendInputToManager(HidDeviceType deviceType, uint16_t nUsagePage, uint16_t nUsage,
                                 int64_t nRelativeValue, InputState& state);
  static uint32_t buttons(HidDeviceType deviceType);
  static Spinlock m_Lock;
  static InputState* m_pInputs;
  InputState* m_pNext;
  uint64_t m_Keys[4];
  uint32_t m_MouseButtons;
  uint32_t m_JoystickButtons;
};
 
uint64_t getBufferField(uint8_t* pBuffer, size_t nStart, size_t nLength);
 
void fixNegativeMinimum(int64_t& nMin, int64_t nMax);
 
void fixNegativeValue(int64_t nMin, int64_t nMax, int64_t& nValue);
 
void sendInputToManager(HidDeviceType deviceType, uint16_t nUsagePage, uint16_t nUsage,
                        int64_t nRelativeValue, InputState& state);
};  // namespace HidUtils
 
#endif