pnp.c

winddk src目录下的WDM源码压缩!

        else
        {
            numValues++;
        }
    }
    valueCaps = HidDevice->InputValueCaps;


    //
    // Allocate a buffer to hold the struct _HID_DATA structures.
    // One element for each set of buttons, and one element for each value
    // found.
    //

    HidDevice->InputDataLength = HidDevice->Caps.NumberInputButtonCaps
                               + numValues;

    HidDevice->InputData = data = (PHID_DATA)
        calloc (HidDevice->InputDataLength, sizeof (HID_DATA));

    if (NULL == data)
    {
        return (FALSE);
    }

    //
    // Fill in the button data
    //

    for (i = 0;
         i < HidDevice->Caps.NumberInputButtonCaps;
         i++, data++, buttonCaps++) 
    {
        data->IsButtonData = TRUE;
        data->Status = HIDP_STATUS_SUCCESS;
        data->UsagePage = buttonCaps->UsagePage;
        if (buttonCaps->IsRange) 
        {
            data->ButtonData.UsageMin = buttonCaps -> Range.UsageMin;
            data->ButtonData.UsageMax = buttonCaps -> Range.UsageMax;
        }
        else
        {
            data -> ButtonData.UsageMin = data -> ButtonData.UsageMax = buttonCaps -> NotRange.Usage;
        }
        
        data->ButtonData.MaxUsageLength = HidP_MaxUsageListLength (
                                                HidP_Input,
                                                buttonCaps->UsagePage,
                                                HidDevice->Ppd);
        data->ButtonData.Usages = (PUSAGE)
            calloc (data->ButtonData.MaxUsageLength, sizeof (USAGE));

        data->ReportID = buttonCaps -> ReportID;
    }

    //
    // Fill in the value data
    //

    for (i = 0; i < numValues; i++, valueCaps++)
    {
        if (valueCaps->IsRange) 
        {
            for (usage = valueCaps->Range.UsageMin;
                 usage <= valueCaps->Range.UsageMax;
                 usage++) 
            {
                data->IsButtonData = FALSE;
                data->Status = HIDP_STATUS_SUCCESS;
                data->UsagePage = valueCaps->UsagePage;
                data->ValueData.Usage = usage;
                data->ReportID = valueCaps -> ReportID;
                data++;
            }
        } 
        else
        {
            data->IsButtonData = FALSE;
            data->Status = HIDP_STATUS_SUCCESS;
            data->UsagePage = valueCaps->UsagePage;
            data->ValueData.Usage = valueCaps->NotRange.Usage;
            data->ReportID = valueCaps -> ReportID;
            data++;
        }
    }

    //
    // setup Output Data buffers.
    //

    HidDevice->OutputReportBuffer = (PCHAR)
        calloc (HidDevice->Caps.OutputReportByteLength, sizeof (CHAR));

    HidDevice->OutputButtonCaps = buttonCaps = (PHIDP_BUTTON_CAPS)
        calloc (HidDevice->Caps.NumberOutputButtonCaps, sizeof (HIDP_BUTTON_CAPS));

    if (NULL == buttonCaps)
    {
        return (FALSE);
    }    

    HidDevice->OutputValueCaps = valueCaps = (PHIDP_VALUE_CAPS)
        calloc (HidDevice->Caps.NumberOutputValueCaps, sizeof (HIDP_VALUE_CAPS));

    if (NULL == valueCaps)
    {
        return (FALSE);
    }

    numCaps = HidDevice->Caps.NumberOutputButtonCaps;
    HidP_GetButtonCaps (HidP_Output,
                        buttonCaps,
                        &numCaps,
                        HidDevice->Ppd);

    numCaps = HidDevice->Caps.NumberOutputValueCaps;
    HidP_GetValueCaps (HidP_Output,
                       valueCaps,
                       &numCaps,
                       HidDevice->Ppd);

    numValues = 0;
    for (i = 0; i < HidDevice->Caps.NumberOutputValueCaps; i++, valueCaps++) 
    {
        if (valueCaps->IsRange) 
        {
            numValues += valueCaps->Range.UsageMax
                       - valueCaps->Range.UsageMin + 1;
        } 
        else
        {
            numValues++;
        }
    }
    valueCaps = HidDevice->OutputValueCaps;

    HidDevice->OutputDataLength = HidDevice->Caps.NumberOutputButtonCaps
                                + numValues;

    HidDevice->OutputData = data = (PHID_DATA)
       calloc (HidDevice->OutputDataLength, sizeof (HID_DATA));

    if (NULL == data)
    {
        return (FALSE);
    }

    for (i = 0;
         i < HidDevice->Caps.NumberOutputButtonCaps;
         i++, data++, buttonCaps++) 
    {
        data->IsButtonData = TRUE;
        data->Status = HIDP_STATUS_SUCCESS;
        data->UsagePage = buttonCaps->UsagePage;

        if (buttonCaps->IsRange)
        {
            data->ButtonData.UsageMin = buttonCaps -> Range.UsageMin;
            data->ButtonData.UsageMax = buttonCaps -> Range.UsageMax;
        }
        else
        {
            data -> ButtonData.UsageMin = data -> ButtonData.UsageMax = buttonCaps -> NotRange.Usage;
        }

        data->ButtonData.MaxUsageLength = HidP_MaxUsageListLength (
                                                   HidP_Output,
                                                   buttonCaps->UsagePage,
                                                   HidDevice->Ppd);

        data->ButtonData.Usages = (PUSAGE)
            calloc (data->ButtonData.MaxUsageLength, sizeof (USAGE));

        data->ReportID = buttonCaps -> ReportID;
    }

    for (i = 0; i < numValues; i++, valueCaps++)
    {
        if (valueCaps->IsRange)
        {
            for (usage = valueCaps->Range.UsageMin;
                 usage <= valueCaps->Range.UsageMax;
                 usage++) 
            {
                data->IsButtonData = FALSE;
                data->Status = HIDP_STATUS_SUCCESS;
                data->UsagePage = valueCaps->UsagePage;
                data->ValueData.Usage = usage;
                data->ReportID = valueCaps -> ReportID;
                data++;
            }
        }
        else
        {
            data->IsButtonData = FALSE;
            data->Status = HIDP_STATUS_SUCCESS;
            data->UsagePage = valueCaps->UsagePage;
            data->ValueData.Usage = valueCaps->NotRange.Usage;
            data->ReportID = valueCaps -> ReportID;
            data++;
        }
    }

    //
    // setup Feature Data buffers.
    //

    HidDevice->FeatureReportBuffer = (PCHAR)
           calloc (HidDevice->Caps.FeatureReportByteLength, sizeof (CHAR));

    HidDevice->FeatureButtonCaps = buttonCaps = (PHIDP_BUTTON_CAPS)
        calloc (HidDevice->Caps.NumberFeatureButtonCaps, sizeof (HIDP_BUTTON_CAPS));

    if (NULL == buttonCaps)
    {
        return (FALSE);
    }

    HidDevice->FeatureValueCaps = valueCaps = (PHIDP_VALUE_CAPS)
        calloc (HidDevice->Caps.NumberFeatureValueCaps, sizeof (HIDP_VALUE_CAPS));

    if (NULL == valueCaps)
    {
        return (FALSE);
    }

    numCaps = HidDevice->Caps.NumberFeatureButtonCaps;
    HidP_GetButtonCaps (HidP_Feature,
                        buttonCaps,
                        &numCaps,
                        HidDevice->Ppd);

    numCaps = HidDevice->Caps.NumberFeatureValueCaps;
    HidP_GetValueCaps (HidP_Feature,
                       valueCaps,
                       &numCaps,
                       HidDevice->Ppd);

    numValues = 0;
    for (i = 0; i < HidDevice->Caps.NumberFeatureValueCaps; i++, valueCaps++) 
    {
        if (valueCaps->IsRange) 
        {
            numValues += valueCaps->Range.UsageMax
                       - valueCaps->Range.UsageMin + 1;
        }
        else
        {
            numValues++;
        }
    }
    valueCaps = HidDevice->FeatureValueCaps;

    HidDevice->FeatureDataLength = HidDevice->Caps.NumberFeatureButtonCaps
                                 + numValues;

    HidDevice->FeatureData = data = (PHID_DATA)
        calloc (HidDevice->FeatureDataLength, sizeof (HID_DATA));

    if (NULL == data)
    {
        return (FALSE);
    }


    for (i = 0;
         i < HidDevice->Caps.NumberFeatureButtonCaps;
         i++, data++, buttonCaps++) 
    {
        data->IsButtonData = TRUE;
        data->Status = HIDP_STATUS_SUCCESS;
        data->UsagePage = buttonCaps->UsagePage;

        if (buttonCaps->IsRange)
        {
            data->ButtonData.UsageMin = buttonCaps -> Range.UsageMin;
            data->ButtonData.UsageMax = buttonCaps -> Range.UsageMax;
        }
        else
        {
            data -> ButtonData.UsageMin = data -> ButtonData.UsageMax = buttonCaps -> NotRange.Usage;
        }
        
        data->ButtonData.MaxUsageLength = HidP_MaxUsageListLength (
                                                HidP_Feature,
                                                buttonCaps->UsagePage,
                                                HidDevice->Ppd);
        data->ButtonData.Usages = (PUSAGE)
             calloc (data->ButtonData.MaxUsageLength, sizeof (USAGE));

        data->ReportID = buttonCaps -> ReportID;
    }

    for (i = 0; i < numValues; i++, valueCaps++) 
    {
        if (valueCaps->IsRange)
        {
            for (usage = valueCaps->Range.UsageMin;
                 usage <= valueCaps->Range.UsageMax;
                 usage++)
            {
                data->IsButtonData = FALSE;
                data->Status = HIDP_STATUS_SUCCESS;
                data->UsagePage = valueCaps->UsagePage;
                data->ValueData.Usage = usage;
                data->ReportID = valueCaps -> ReportID;
                data++;
            }
        } 
        else
        {
            data->IsButtonData = FALSE;
            data->Status = HIDP_STATUS_SUCCESS;
            data->UsagePage = valueCaps->UsagePage;
            data->ValueData.Usage = valueCaps->NotRange.Usage;
            data->ReportID = valueCaps -> ReportID;
            data++;
        }
    }

    return (TRUE);
}

VOID
CloseHidDevices(
    IN  PHID_DEVICE HidDevices,
    IN  ULONG       NumberDevices
)
{
    ULONG   Index;

    for (Index = 0; Index < NumberDevices; Index++) 
    {
        CloseHidDevice(HidDevices+Index);
    }

    return;
}

VOID
CloseHidDevice (
    IN PHID_DEVICE HidDevice
)
{
    free(HidDevice -> DevicePath);
    
    if (INVALID_HANDLE_VALUE != HidDevice -> HidDevice)
    {
        CloseHandle(HidDevice -> HidDevice);
		HidDevice -> HidDevice = INVALID_HANDLE_VALUE;
    }
    
    if (NULL != HidDevice -> Ppd)
    {
        HidD_FreePreparsedData(HidDevice -> Ppd);
		HidDevice -> Ppd = NULL;
    }

    if (NULL != HidDevice -> InputReportBuffer)
    {
        free(HidDevice -> InputReportBuffer);
		HidDevice -> InputReportBuffer = NULL;
    }

    if (NULL != HidDevice -> InputData)
    {
        free(HidDevice -> InputData);
		HidDevice -> InputData = NULL;
    }

    if (NULL != HidDevice -> InputButtonCaps)
    {
        free(HidDevice -> InputButtonCaps);
		HidDevice -> InputButtonCaps = NULL;
    }

    if (NULL != HidDevice -> InputValueCaps)
    {
        free(HidDevice -> InputValueCaps);
		HidDevice -> InputValueCaps = NULL;
    }

    if (NULL != HidDevice -> OutputReportBuffer)
    {
        free(HidDevice -> OutputReportBuffer);
		HidDevice -> OutputReportBuffer = NULL;
    }

    if (NULL != HidDevice -> OutputData)
    {
        free(HidDevice -> OutputData);
		HidDevice -> OutputData = NULL;
    }

    if (NULL != HidDevice -> OutputButtonCaps) 
    {
        free(HidDevice -> OutputButtonCaps);
		HidDevice -> OutputButtonCaps = NULL;
    }

    if (NULL != HidDevice -> OutputValueCaps)
    {
        free(HidDevice -> OutputValueCaps);
		HidDevice -> OutputValueCaps = NULL;
    }

    if (NULL != HidDevice -> FeatureReportBuffer)
    {
        free(HidDevice -> FeatureReportBuffer);
		HidDevice -> FeatureReportBuffer = NULL;
    }

    if (NULL != HidDevice -> FeatureData) 
    {
        free(HidDevice -> FeatureData);
		HidDevice -> FeatureData = NULL;
    }

    if (NULL != HidDevice -> FeatureButtonCaps) 
    {
        free(HidDevice -> FeatureButtonCaps);
		HidDevice -> FeatureButtonCaps = NULL;
    }

    if (NULL != HidDevice -> FeatureValueCaps) 
    {
        free(HidDevice -> FeatureValueCaps);
		HidDevice -> FeatureValueCaps = NULL;
    }

     return;
}