//     File: main.c
// Abstract: main source code to HID Dumper
//  Version: 2.0
// 
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// Copyright (C) 2013 Apple Inc. All Rights Reserved.
// 
// ****************************************************
#pragma mark -
#pragma mark * complation directives *
// ----------------------------------------------------

// ****************************************************
#pragma mark -
#pragma mark * includes & imports *
// ----------------------------------------------------
#include <CoreFoundation/CoreFoundation.h>

#include "HID_Utilities_External.h"

// ****************************************************
#pragma mark - typedef's, struct's, enums, defines, etc. *
// ----------------------------------------------------

// ****************************************************
#pragma mark - local (static) function implementations
// ----------------------------------------------------


// ****************************************************
#pragma mark - global (external) function implementations
// ----------------------------------------------------
int main(int			argc,
         const char *	argv[]) {
#pragma unused ( argc, argv )

	IOHIDManagerRef tIOHIDManagerRef = NULL;
	CFSetRef deviceCFSetRef = NULL;
	IOHIDDeviceRef *tIOHIDDeviceRefs = nil;

	do {
		tIOHIDManagerRef = IOHIDManagerCreate(kCFAllocatorDefault,
		                                      kIOHIDOptionsTypeNone);
		if (!tIOHIDManagerRef) {
			break;
		}

		IOHIDManagerSetDeviceMatching(tIOHIDManagerRef,
		                              NULL);

		IOReturn tIOReturn = IOHIDManagerOpen(tIOHIDManagerRef,
		                                      kIOHIDOptionsTypeNone);
		if (noErr != tIOReturn) {
			break;
		}

		deviceCFSetRef = IOHIDManagerCopyDevices(tIOHIDManagerRef);
		if (!deviceCFSetRef) {
			break;
		}

		CFIndex deviceIndex,
		        deviceCount = CFSetGetCount(deviceCFSetRef);

		tIOHIDDeviceRefs = malloc(sizeof(IOHIDDeviceRef) *
		                          deviceCount);
		if (!tIOHIDDeviceRefs) {
			break;
		}

		CFSetGetValues(deviceCFSetRef,
		               (const void **)tIOHIDDeviceRefs);
		CFRelease(deviceCFSetRef);
		deviceCFSetRef = NULL;
		for (deviceIndex = 0; deviceIndex < deviceCount; deviceIndex++) {
			if (!tIOHIDDeviceRefs[deviceIndex]) {
				continue;
			}

			HIDDumpDeviceInfo(tIOHIDDeviceRefs[deviceIndex]);
#if true
			// and copy all the elements
			CFArrayRef elementCFArrayRef = IOHIDDeviceCopyMatchingElements(tIOHIDDeviceRefs[deviceIndex],
			                                                               NULL /* matchingCFDictRef */,
			                                                               kIOHIDOptionsTypeNone);
			if (elementCFArrayRef) {
				// iterate over all the elements
				CFIndex elementIndex,
				        elementCount = CFArrayGetCount(elementCFArrayRef);
				for (elementIndex = 0; elementIndex < elementCount; elementIndex++) {
					IOHIDElementRef tIOHIDElementRef = (IOHIDElementRef)CFArrayGetValueAtIndex(elementCFArrayRef,
					                                                                           elementIndex);
					if (tIOHIDElementRef) {
						HIDDumpElementInfo(tIOHIDElementRef);
					}
				}

				CFRelease(elementCFArrayRef);
			}
#endif
		}
	} while (false);

	if (tIOHIDDeviceRefs) {
		free(tIOHIDDeviceRefs);
	}
	if (deviceCFSetRef) {
		CFRelease(deviceCFSetRef);
		deviceCFSetRef = NULL;
	}
	if (tIOHIDManagerRef) {
		CFRelease(tIOHIDManagerRef);
	}

	return (0);
} // main