/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
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/*
    Title: USBGetDescriptorRequest implementation

    About: Purpose
        Implementation of the USBGetDescriptorRequest class.
*/

//------------------------------------------------------------------------------
//         Headers
//------------------------------------------------------------------------------

#include "USBGetDescriptorRequest.h"

//------------------------------------------------------------------------------
//         Exported functions
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// Returns the type of the descriptor requested by the host given the
/// corresponding GET_DESCRIPTOR request.
/// \param request Pointer to a USBGenericDescriptor instance.
/// \return Type of the requested descriptor.
//------------------------------------------------------------------------------
unsigned char USBGetDescriptorRequest_GetDescriptorType(
    const USBGenericRequest *request)
{
    // Requested descriptor type is in the high-byte of the wValue field
    return (USBGenericRequest_GetValue(request) >> 8) & 0xFF;
}

//------------------------------------------------------------------------------
/// Returns the index of the requested descriptor, given the corresponding
/// GET_DESCRIPTOR request.
/// \param request Pointer to a USBGenericDescriptor instance.
/// \return Index of the requested descriptor.
//------------------------------------------------------------------------------
unsigned char USBGetDescriptorRequest_GetDescriptorIndex(
    const USBGenericRequest *request)
{
    // Requested descriptor index if in the low byte of the wValue field
    return USBGenericRequest_GetValue(request) & 0xFF;
}