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hid: Correctly sign-extend all values in HidP_GetScaledUsageValue(). 

Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Aric Stewart <aric@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2019-02-12 00:06:03 -06:00 committed by Alexandre Julliard
parent 967e2622fb
commit fbc1a89a40
1 changed files with 14 additions and 1 deletions
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15
dlls/hid/hidp.c
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@ -259,6 +259,19 @@ static NTSTATUS find_value(HIDP_REPORT_TYPE ReportType, USAGE UsagePage, USHORT
return HIDP_STATUS_USAGE_NOT_FOUND;
}
static LONG sign_extend(ULONG value, const WINE_HID_ELEMENT *element)
{
UINT bit_count = element->bitCount;
if ((value & (1 << (bit_count - 1)))
&& element->ElementType == ValueElement
&& element->caps.value.LogicalMin < 0)
{
value -= (1 << bit_count);
}
return value;
}
NTSTATUS WINAPI HidP_GetScaledUsageValue(HIDP_REPORT_TYPE ReportType, USAGE UsagePage,
USHORT LinkCollection, USAGE Usage, PLONG UsageValue,
PHIDP_PREPARSED_DATA PreparsedData, PCHAR Report, ULONG ReportLength)
@ -277,7 +290,7 @@ NTSTATUS WINAPI HidP_GetScaledUsageValue(HIDP_REPORT_TYPE ReportType, USAGE Usag
element->valueStartBit, element->bitCount, &rawValue);
if (rc != HIDP_STATUS_SUCCESS)
return rc;
*UsageValue = rawValue;
*UsageValue = sign_extend(rawValue, element);
}
return rc;