#ifndef _NTINTSAFE_H_INCLUDED_
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM | WINAPI_PARTITION_GAMES)

//
// USHORT multiplication
//
_Must_inspect_result_
__inline
NTSTATUS
RtlUShortMult(
    _In_ USHORT usMultiplicand,
    _In_ USHORT usMultiplier,
    _Out_ _Deref_out_range_(==, usMultiplicand * usMultiplier) USHORT* pusResult)
{
    ULONG ulResult = ((ULONG)usMultiplicand) * ((ULONG)usMultiplier);

    return RtlULongToUShort(ulResult, pusResult);
}

#endif
#endif
View code on GitHub

// ntintsafe.h

NTSTATUS RtlUShortMult(
  [in]  USHORT usMultiplicand,
  [in]  USHORT usMultiplier,
  [out] USHORT *pusResult
);
View the official Windows Driver Kit DDI reference

NtDoc

No description available.

Edit description on GitHub

Windows Driver Kit DDI reference (nf-ntintsafe-rtlushortmult)

RtlUShortMult function

Description

Multiplies one value of type USHORT by another.

Parameters

`usMultiplicand` [in]

The value to be multiplied by usMultiplier.

`usMultiplier` [in]

The value by which to multiply usMultiplicand.

`pusResult` [out]

A pointer to the result. If the operation results in a value that overflows or underflows the capacity of the type, the function returns STATUS_INTEGER_OVERFLOW and this parameter is not valid.

Return value

Returns STATUS_SUCCESS if the operation is successful.

See the implementation of this helper function in ntintsafe.h in the WDK for possible error return values.

Remarks

This is one of a set of inline functions designed to provide arithmetic operations and perform validity checks with minimal impact on performance.

View the official Windows Driver Kit DDI reference