Exemple #1
0
OSString * ACPIBacklightPanel::getACPIPath(IOACPIPlatformDevice * acpiDevice)
{
    OSString * separator = OSString::withCStringNoCopy(".");
    OSArray * array = OSArray::withCapacity(10);
    
    char devicePath[512];
    bzero(devicePath, sizeof(devicePath));
    IOACPIPlatformDevice * parent = acpiDevice;
    
    IORegistryIterator * iter = IORegistryIterator::iterateOver(acpiDevice, gIOACPIPlane, kIORegistryIterateParents | kIORegistryIterateRecursively);
    if (iter)
    {
        do {
            array->setObject(parent->copyName(gIOACPIPlane));
            array->setObject(separator);
            parent = OSDynamicCast(IOACPIPlatformDevice, iter->getNextObject());
        } while (parent);
        iter->release();
        
        int offset = 0;
        OSString * str = OSDynamicCast(OSString, array->getLastObject());
        for (int i = array->getCount()-2; ((i>=0) || ((offset + str->getLength()) > sizeof(devicePath))) ; i--)
        {
            str = OSDynamicCast(OSString, array->getObject(i));
            strncpy(devicePath + offset, str->getCStringNoCopy(), str->getLength());
            offset += str->getLength();
        }
    }
    return OSString::withCString(devicePath);
}