Separated joystick state from window system state.

This is partially in preparation for pending support for additional
joystick APIs like XInput, DirectInput and IOHID.

src/iokit_joystick.h

@@ -0,0 +1,69 @@
+//========================================================================
+// GLFW 3.1 IOKit - www.glfw.org
+//------------------------------------------------------------------------
+// Copyright (c) 2006-2014 Camilla Berglund <elmindreda@elmindreda.org>
+//
+// 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.
+//
+//========================================================================
+
+#ifndef _iokit_joystick_h_
+#define _iokit_joystick_h_
+
+#include <IOKit/IOKitLib.h>
+#include <IOKit/IOCFPlugIn.h>
+#include <IOKit/hid/IOHIDLib.h>
+#include <IOKit/hid/IOHIDKeys.h>
+
+#define _GLFW_PLATFORM_LIBRARY_JOYSTICK_STATE \
+    _GLFWjoystickIOKit joystick[GLFW_JOYSTICK_LAST + 1]
+
+
+//========================================================================
+// GLFW platform specific types
+//========================================================================
+
+//------------------------------------------------------------------------
+// Platform-specific joystick structure
+//------------------------------------------------------------------------
+typedef struct _GLFWjoystickIOKit
+{
+    int             present;
+    char            name[256];
+
+    IOHIDDeviceInterface** interface;
+
+    CFMutableArrayRef axisElements;
+    CFMutableArrayRef buttonElements;
+    CFMutableArrayRef hatElements;
+
+    float*          axes;
+    unsigned char*  buttons;
+} _GLFWjoystickIOKit;
+
+
+//========================================================================
+// Prototypes for platform specific internal functions
+//========================================================================
+
+void _glfwInitJoysticks(void);
+void _glfwTerminateJoysticks(void);
+
+#endif // _iokit_joystick_h_