VOID ClassScanForSpecial	(	IN PFUNCTIONAL_DEVICE_EXTENSION	FdoExtension,
		IN CLASSPNP_SCAN_FOR_SPECIAL_INFO	DeviceList[],
		IN PCLASS_SCAN_FOR_SPECIAL_HANDLER	Function
	)

Definition at line 221 of file utils.c.

Referenced by ClassPnpStartDevice(), DiskInitFdo(), and ScanForSpecial().

{
    PSTORAGE_DEVICE_DESCRIPTOR deviceDescriptor;
    PUCHAR vendorId;
    PUCHAR productId;
    PUCHAR productRevision;
    UCHAR nullString[] = "";
    ULONG j;

    PAGED_CODE();
    ASSERT(DeviceList);
    ASSERT(Function);

    deviceDescriptor = FdoExtension->DeviceDescriptor;

    if (DeviceList == NULL) {
        return;
    }
    if (Function == NULL) {
        return;
    }

    //
    // SCSI sets offsets to -1, ATAPI sets to 0.  check for both.
    //

    if (deviceDescriptor->VendorIdOffset != 0 &&
        deviceDescriptor->VendorIdOffset != -1) {
        vendorId = ((PUCHAR)deviceDescriptor);
        vendorId += deviceDescriptor->VendorIdOffset;
    } else {
        vendorId = nullString;
    }
    if (deviceDescriptor->ProductIdOffset != 0 &&
        deviceDescriptor->ProductIdOffset != -1) {
        productId = ((PUCHAR)deviceDescriptor);
        productId += deviceDescriptor->ProductIdOffset;
    } else {
        productId = nullString;
    }
    if (deviceDescriptor->VendorIdOffset != 0 &&
        deviceDescriptor->VendorIdOffset != -1) {
        productRevision = ((PUCHAR)deviceDescriptor);
        productRevision += deviceDescriptor->ProductRevisionOffset;
    } else {
        productRevision = nullString;
    }

    //
    // loop while the device list is valid (not null-filled)
    //

    for (;(DeviceList->VendorId        != NULL ||
           DeviceList->ProductId       != NULL ||
           DeviceList->ProductRevision != NULL);DeviceList++) {

        if (ClasspMyStringMatches(DeviceList->VendorId,        vendorId) &&
            ClasspMyStringMatches(DeviceList->ProductId,       productId) &&
            ClasspMyStringMatches(DeviceList->ProductRevision, productRevision)
            ) {

            DebugPrint((1, "ClasspScanForSpecialByInquiry: Found matching "
                        "controller Ven: %s Prod: %s Rev: %s\n",
                        vendorId, productId, productRevision));

            //
            // pass the context to the call back routine and exit
            //

            (Function)(FdoExtension, DeviceList->Data);

            //
            // for CHK builds, try to prevent wierd stacks by having a debug
            // print here. it's a hack, but i know of no other way to prevent
            // the stack from being wrong.
            //

            DebugPrint((16, "ClasspScanForSpecialByInquiry: "
                        "completed callback\n"));
            return;

        } // else the strings did not match

    } // none of the devices matched.

    DebugPrint((1, "ClasspScanForSpecialByInquiry: no match found for %p\n",
                FdoExtension->DeviceObject));
    return;

} // end ClasspScanForSpecialByInquiry()

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