/*
 	File:		HID_CFM.c

	Contains:   Implementation of the CFM interfaces to the HID Utilities bundle
    
	DRI: George Warner

	Copyright:	Copyright © 2002 Apple Computer, Inc., All Rights Reserved

	Disclaimer:	IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.
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 */

//includes

#include "HID_Utilities_CFM.h"

// ==================================

// types

typedef unsigned char (*fpHIDBuildDeviceListtype) (unsigned long usagePage, unsigned long usage);
typedef void (*fpHIDReleaseDeviceListtype) (void);
typedef unsigned char (*fpHIDHaveDeviceListtype) (void);
typedef unsigned long (*fpHIDCountDevicestype) (void);
typedef unsigned long (*fpHIDCountDeviceElementstype) (pRecDevice pDevice, HIDElementTypeMask typeMask);
typedef pRecDevice (*fpHIDGetFirstDevicetype) (void);
typedef pRecDevice (*fpHIDGetNextDevicetype) (pRecDevice pDevice);
typedef pRecElement (*fpHIDGetFirstDeviceElementtype) (pRecDevice pDevice, HIDElementTypeMask typeMask);
typedef pRecElement (*fpHIDGetNextDeviceElementtype) (pRecElement pElement, HIDElementTypeMask typeMask);
typedef pRecElement (*fpHIDGetPreviousDeviceElementtype) (pRecElement pElement, HIDElementTypeMask typeMask);
typedef void (*fpHIDGetTypeNametype) (unsigned long type, char * cstrName);
typedef void (*fpHIDGetUsageNametype) (long valueUsagePage, long valueUsage, char * cstrName);
typedef unsigned long  (*fpHIDQueueElementtype) (pRecDevice pDevice, pRecElement pElement);
typedef unsigned long  (*fpHIDQueueDevicetype) (pRecDevice pDevice);
typedef unsigned long  (*fpHIDDequeueElementtype) (pRecDevice pDevice, pRecElement pElement);
typedef unsigned long  (*fpHIDDequeueDevicetype) (pRecDevice pDevice);
typedef unsigned char (*fpHIDGetEventtype) (pRecDevice pDevice, void * pHIDEvent);
typedef long (*fpHIDGetElementValuetype) (pRecDevice pDevice, pRecElement pElement);
typedef long (*fpHIDCalibrateValuetype) (long value, pRecElement pElement);
typedef long (*fpHIDScaleValuetype) (long value, pRecElement pElement);
typedef unsigned char (*fpHIDConfigureActiontype) (pRecDevice * ppDevice, pRecElement * ppElement, float timeout);
typedef void (*fpHIDSaveElementConfigtype) (FILE * fileRef, pRecDevice pDevice, pRecElement pElement, long actionCookie);
typedef long (*fpHIDRestoreElementConfigtype) (FILE * fileRef, pRecDevice * ppDevice, pRecElement * ppElement);

// function pointers
fpHIDBuildDeviceListtype fpHIDBuildDeviceList = NULL;
fpHIDReleaseDeviceListtype fpHIDReleaseDeviceList = NULL;
fpHIDHaveDeviceListtype fpHIDHaveDeviceList = NULL;
fpHIDCountDevicestype fpHIDCountDevices = NULL;
fpHIDCountDeviceElementstype fpHIDCountDeviceElements = NULL;
fpHIDGetFirstDevicetype fpHIDGetFirstDevice = NULL;
fpHIDGetNextDevicetype fpHIDGetNextDevice = NULL;
fpHIDGetFirstDeviceElementtype fpHIDGetFirstDeviceElement = NULL;
fpHIDGetNextDeviceElementtype fpHIDGetNextDeviceElement = NULL;
fpHIDGetPreviousDeviceElementtype fpHIDGetPreviousDeviceElement = NULL;
fpHIDGetTypeNametype fpHIDGetTypeName = NULL;
fpHIDGetUsageNametype fpHIDGetUsageName = NULL;
fpHIDQueueElementtype fpHIDQueueElement = NULL;
fpHIDQueueDevicetype fpHIDQueueDevice = NULL;
fpHIDDequeueElementtype fpHIDDequeueElement = NULL;
fpHIDDequeueDevicetype fpHIDDequeueDevice = NULL;
fpHIDGetEventtype fpHIDGetEvent = NULL;
fpHIDGetElementValuetype fpHIDGetElementValue = NULL;
fpHIDCalibrateValuetype fpHIDCalibrateValue = NULL;
fpHIDScaleValuetype fpHIDScaleValue = NULL;
fpHIDConfigureActiontype fpHIDConfigureAction = NULL;
fpHIDSaveElementConfigtype fpHIDSaveElementConfig = NULL;
fpHIDRestoreElementConfigtype fpHIDRestoreElementConfig = NULL;

//globals

CFURLRef gBundleURL = NULL;
CFBundleRef gBundle = NULL;

// ==================================

OSStatus SetupHIDCFM (void)
{
	Boolean didLoad = false; //	Flag that indicates the status returned when attempting to load a bundle's executable code.
	CFBundleRef refMainBundle = NULL;
	CFURLRef refMainBundleURL = NULL, refPathBundleURL = NULL; 

	//	See the Core Foundation URL Services chapter for details.
	// get app bundle (even for a CFM app!)
	refMainBundle = CFBundleGetMainBundle(); 
	if (!refMainBundle)
	{
        DebugStr ("\pCould open main bundle");
		return paramErr;
	}
	// create a URL to the app bundle
	refMainBundleURL = CFBundleCopyBundleURL (refMainBundle); 
	if (!refMainBundleURL)
	{
        DebugStr ("\pCould not copy main bundle URL");
		return paramErr;
	}
	// create a URL that points to the app's directory
	refPathBundleURL = CFURLCreateCopyDeletingLastPathComponent (NULL, refMainBundleURL); 
	if (!refPathBundleURL)
	{
        DebugStr ("\pCould not create new parent URL deleting last path component");
		if (refMainBundleURL != NULL) 
			CFRelease (refMainBundleURL);
		return paramErr;
	}
	// create a URL to the HID library bundle
	gBundleURL = CFURLCreateCopyAppendingPathComponent (NULL, refPathBundleURL, CFSTR("HID.bundle"), true); 
	// release created URLs
	if (refMainBundleURL != NULL) 
		CFRelease (refMainBundleURL);
	if (refPathBundleURL != NULL) 
		CFRelease (refPathBundleURL);
	// did we actaully get a bundle URL
	if (!gBundleURL)
	{
        DebugStr ("\pCould create HID bundle URL");
		return paramErr;
    }
	// get the actual bundle for the HID library
	gBundle = CFBundleCreate (NULL, gBundleURL);
	if (!gBundle)
	{
        DebugStr ("\pCould not create HID MachO library bundle");
		return paramErr;
	}
    if (!CFBundleLoadExecutable (gBundle)) // If the code was successfully loaded, look for our function.
	{
    	DebugStr ("\pCould not load MachO executable");
    	return paramErr;
	}
	// Now that the code is loaded, search for the function we want by name.
	fpHIDBuildDeviceList = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDBuildDeviceList"));
	fpHIDReleaseDeviceList = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDReleaseDeviceList"));
	fpHIDHaveDeviceList = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDHaveDeviceList"));
	fpHIDCountDevices = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDCountDevices"));
	fpHIDCountDeviceElements = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDCountDeviceElements"));
	fpHIDGetFirstDevice = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetFirstDevice"));
	fpHIDGetNextDevice = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetNextDevice"));
	fpHIDGetFirstDeviceElement = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetFirstDeviceElement"));
	fpHIDGetNextDeviceElement = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetNextDeviceElement"));
	fpHIDGetPreviousDeviceElement = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetPreviousDeviceElement"));
	fpHIDGetTypeName = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetTypeName"));
	fpHIDGetUsageName = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetUsageName"));
	fpHIDQueueElement = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDQueueElement"));
	fpHIDQueueDevice = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDQueueDevice"));
	fpHIDDequeueElement = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDDequeueElement"));
	fpHIDDequeueDevice = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDDequeueDevice"));
	fpHIDGetEvent = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetEvent"));
	fpHIDGetElementValue = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDGetElementValue"));
	fpHIDCalibrateValue = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDCalibrateValue"));
	fpHIDScaleValue = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDScaleValue"));
	fpHIDConfigureAction = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDConfigureAction"));
	fpHIDSaveElementConfig = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDSaveElementConfig"));
	fpHIDRestoreElementConfig = (void *) CFBundleGetFunctionPointerForName (gBundle, CFSTR("HIDRestoreElementConfig"));
	return noErr;
}

void TearDownHIDCFM (void)
{
	// disassociate function pointers
	fpHIDBuildDeviceList = NULL;
	fpHIDReleaseDeviceList = NULL;
	fpHIDHaveDeviceList = NULL;
	fpHIDCountDevices = NULL;
	fpHIDCountDeviceElements = NULL;
	fpHIDGetFirstDevice = NULL;
	fpHIDGetNextDevice = NULL;
	fpHIDGetFirstDeviceElement = NULL;
	fpHIDGetNextDeviceElement = NULL;
	fpHIDGetPreviousDeviceElement = NULL;
	fpHIDGetTypeName = NULL;
	fpHIDGetUsageName = NULL;
	fpHIDQueueElement = NULL;
	fpHIDQueueDevice = NULL;
	fpHIDDequeueElement = NULL;
	fpHIDDequeueDevice = NULL;
	fpHIDGetEvent = NULL;
	fpHIDGetElementValue = NULL;
	fpHIDCalibrateValue = NULL;
	fpHIDScaleValue = NULL;
	fpHIDConfigureAction = NULL;
	fpHIDSaveElementConfig = NULL;
	fpHIDRestoreElementConfig = NULL;
	if (gBundle != NULL)
	{
        CFBundleUnloadExecutable (gBundle);			//	Unload the bundle's executable code. 
        if (gBundleURL != NULL) 
            CFRelease (gBundleURL);
        CFRelease (gBundle);
	}
}

unsigned char HIDBuildDeviceList (unsigned long usagePage, unsigned long usage)
{
	return (*fpHIDBuildDeviceList) (usagePage, usage);
}

void HIDReleaseDeviceList (void)
{
	(*fpHIDReleaseDeviceList) ();
}

unsigned char HIDHaveDeviceList (void)
{
	return (*fpHIDHaveDeviceList) ();
}

unsigned long HIDCountDevices (void)
{
	return (*fpHIDCountDevices) ();
}

unsigned long HIDCountDeviceElements (pRecDevice pDevice, HIDElementTypeMask typeMask)
{
	return (*fpHIDCountDeviceElements) (pDevice, typeMask);
}

pRecDevice HIDGetFirstDevice (void)
{
	return (*fpHIDGetFirstDevice) ();
}

pRecDevice HIDGetNextDevice (pRecDevice pDevice)
{
	return (*fpHIDGetNextDevice) (pDevice);
}

pRecElement HIDGetFirstDeviceElement (pRecDevice pDevice, HIDElementTypeMask typeMask)
{
	return (*fpHIDGetFirstDeviceElement) (pDevice, typeMask);
}

pRecElement HIDGetNextDeviceElement (pRecElement pElement, HIDElementTypeMask typeMask)
{
	return (*fpHIDGetNextDeviceElement) (pElement, typeMask);
}

pRecElement HIDGetPreviousDeviceElement (pRecElement pElement, HIDElementTypeMask typeMask)
{
	return (*fpHIDGetPreviousDeviceElement) (pElement, typeMask);
}

void HIDGetTypeName (unsigned long type, char * cstrName)
{
	(*fpHIDGetTypeName) (type, cstrName);
}

void HIDGetUsageName (long valueUsagePage, long valueUsage, char * cstrName)
{
	(*fpHIDGetUsageName) (valueUsagePage, valueUsage, cstrName);
}

// ==================================

// Element Event Queue and Value Interfaces

unsigned long  HIDQueueElement (pRecDevice pDevice, pRecElement pElement)
{
	return (*fpHIDQueueElement) (pDevice, pElement);
}

unsigned long  HIDQueueDevice (pRecDevice pDevice)
{
	return (*fpHIDQueueDevice) (pDevice);
}

unsigned long  HIDDequeueElement (pRecDevice pDevice, pRecElement pElement)
{
	return (*fpHIDDequeueElement) (pDevice, pElement);
}

unsigned long  HIDDequeueDevice (pRecDevice pDevice)
{
	return (*fpHIDDequeueDevice) (pDevice);
}

unsigned char HIDGetEvent (pRecDevice pDevice, void * pHIDEvent)
{
	return (*fpHIDGetEvent) (pDevice, pHIDEvent);
}

long HIDGetElementValue (pRecDevice pDevice, pRecElement pElement)
{
	return (*fpHIDGetElementValue) (pDevice, pElement);
}

long HIDCalibrateValue (long value, pRecElement pElement)
{
	return (*fpHIDCalibrateValue) (value, pElement);
}

long HIDScaleValue (long value, pRecElement pElement)
{
	return (*fpHIDScaleValue) (value, pElement);
}

// ==================================

// Conguration and Save Interfaces

unsigned char HIDConfigureAction (pRecDevice * ppDevice, pRecElement * ppElement, float timeout)
{
	return (*fpHIDConfigureAction) (ppDevice, ppElement, timeout);
}

void HIDSaveElementConfig (FILE * fileRef, pRecDevice pDevice, pRecElement pElement, long actionCookie)
{
	(*fpHIDSaveElementConfig) (fileRef, pDevice, pElement, actionCookie);
}

long HIDRestoreElementConfig (FILE * fileRef, pRecDevice * ppDevice, pRecElement * ppElement)
{
	return (*fpHIDRestoreElementConfig) (fileRef, ppDevice, ppElement);
}
