Squashed 'external/gainput/' content from commit 2be0a50

git-subtree-dir: external/gainput
git-subtree-split: 2be0a50089eafcc6fccb66142180082e48f27f4c

lib/source/gainput/GainputHelpersEvdev.h

@@ -0,0 +1,126 @@
+
+#ifndef GAINPUTHELPERSEVDEV_H_
+#define GAINPUTHELPERSEVDEV_H_
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <linux/uinput.h>
+
+#include <gainput/GainputLog.h>
+
+namespace gainput
+{
+namespace
+{
+
+static const unsigned EvdevDeviceCount = 10;
+static const char* EvdevDeviceIds[EvdevDeviceCount] =
+{
+	"/dev/input/event0",
+	"/dev/input/event1",
+	"/dev/input/event2",
+	"/dev/input/event3",
+	"/dev/input/event4",
+	"/dev/input/event5",
+	"/dev/input/event6",
+	"/dev/input/event7",
+	"/dev/input/event8",
+	"/dev/input/event9",
+};
+
+typedef long BitType;
+
+#define GAINPUT_BITCOUNT	(sizeof(BitType)*8)
+#define GAINPUT_BITS(n)		((n/GAINPUT_BITCOUNT)+1)
+
+bool IsBitSet(const BitType* bits, unsigned bit)
+{
+	return bool(bits[bit/GAINPUT_BITCOUNT] & (1ul << (bit % GAINPUT_BITCOUNT)));
+}
+
+bool HasEventType(const BitType* bits, unsigned type)
+{
+	return IsBitSet(bits, type);
+}
+
+bool HasEventCode(const BitType* bits, unsigned code)
+{
+	return IsBitSet(bits, code);
+}
+
+
+class EvdevDevice
+{
+public:
+	EvdevDevice(int fd) :
+		valid_(false)
+	{
+		int rc;
+
+		memset(name_, 0, sizeof(name_));
+		rc = ioctl(fd, EVIOCGNAME(sizeof(name_) - 1), name_);
+		if (rc < 0)
+			return;
+
+		GAINPUT_LOG("EVDEV Device name: %s\n", name_);
+
+		rc = ioctl(fd, EVIOCGBIT(0, sizeof(bits_)), bits_);
+		if (rc < 0)
+			return;
+
+		rc = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keyBits_)), keyBits_);
+		if (rc < 0)
+			return;
+
+		valid_ = true;
+	}
+
+	bool IsValid() const
+	{
+		return valid_;
+	}
+
+	InputDevice::DeviceType GetDeviceType() const
+	{
+		if (HasEventType(bits_, EV_REL)
+			&& HasEventType(bits_, EV_KEY)
+			&& HasEventCode(keyBits_, BTN_LEFT))
+		{
+			GAINPUT_LOG("EVDEV Detected as mouse\n");
+			return InputDevice::DT_MOUSE;
+		}
+		else if (HasEventType(bits_, EV_KEY)
+			&& HasEventCode(keyBits_, KEY_A)
+			&& HasEventCode(keyBits_, KEY_Q))
+		{
+			GAINPUT_LOG("EVDEV Detected as keyboard\n");
+			return InputDevice::DT_KEYBOARD;
+		}
+		else if (HasEventType(bits_, EV_ABS)
+			&& HasEventType(bits_, EV_KEY)
+			&& (HasEventCode(keyBits_, BTN_GAMEPAD)
+				|| HasEventCode(keyBits_, BTN_JOYSTICK))
+			)
+		{
+			GAINPUT_LOG("EVDEV Detected as pad\n");
+			return InputDevice::DT_PAD;
+		}
+
+		GAINPUT_LOG("EVDEV Unknown device type\n");
+		return InputDevice::DT_COUNT;
+	}
+
+private:
+	bool valid_;
+	char name_[255];
+	BitType bits_[GAINPUT_BITS(EV_CNT)];
+	BitType keyBits_[GAINPUT_BITS(KEY_CNT)];
+};
+
+
+}
+}
+
+#endif
+