File : IOUSBHIDDriverDescriptorOverride.cpp

Project: iousbhiddriver-descriptor-override

Code Location: http://iousbhiddriver-descriptor-override.googlecode.com/svn/trunk//trunk

Outline

> Fn IOReturn IOUSBHIDDriverDescriptorOverride::newReportDescriptor(IOMemoryDescriptor*)

Download File

IOUSBHIDDriverDescriptorOverride.cpp

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#include <IOKit/IOBufferMemoryDescriptor.h>
#include "IOUSBHIDDriverDescriptorOverride.h"

OSDefineMetaClassAndStructors(IOUSBHIDDriverDescriptorOverride, IOUSBHIDDriver)

IOReturn IOUSBHIDDriverDescriptorOverride::newReportDescriptor(IOMemoryDescriptor **desc) const {
	
	OSData *reportDescriptor = OSDynamicCast(OSData, getProperty(REPORT_DESCRIPTOR_OVERRIDE_KEY));
	
	if(reportDescriptor) {		
		IOBufferMemoryDescriptor *bufferDesc = IOBufferMemoryDescriptor::withBytes(reportDescriptor->getBytesNoCopy(),
																				   reportDescriptor->getLength(),
																				   kIODirectionOutIn);
		if(bufferDesc) {
			*desc = bufferDesc;
			return kIOReturnSuccess;
		} else {
			bufferDesc->release();
			*desc = NULL;
			return kIOReturnNoMemory;
		}
	} else {
		//IOLog("IOUSBHIDDriverDescriptorOverride(%s)[%p]::newReportDescriptor - "
		//	  "No %s data in personality, calling IOUSBHIDDriver::newReportDescriptor\n",
		//	  getName(), this, REPORT_DESCRIPTOR_OVERRIDE_KEY);
		return IOUSBHIDDriver::newReportDescriptor(desc);
	}
}