#ifndef _NTINTSAFE_H_INCLUDED_
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM | WINAPI_PARTITION_GAMES)
//
// UINT_PTR multiplication
//
#ifdef _WIN64

#define RtlUIntPtrMult     RtlULongLongMult

#endif
#endif
#endif
View code on GitHub

#ifndef _NTINTSAFE_H_INCLUDED_
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM | WINAPI_PARTITION_GAMES)
//
// UINT_PTR multiplication
//
#ifdef _WIN64
// ...
#else

_Must_inspect_result_
__inline
NTSTATUS
RtlUIntPtrMult(
    _In_ UINT_PTR uMultiplicand,
    _In_ UINT_PTR uMultiplier,
    _Out_ _Deref_out_range_(==, uMultiplicand * uMultiplier) UINT_PTR* puResult)
{
    ULONGLONG ull64Result = UInt32x32To64(uMultiplicand, uMultiplier);

    return RtlULongLongToUIntPtr(ull64Result, puResult);
}

#endif
#endif
#endif
View code on GitHub

// ntintsafe.h

NTSTATUS RtlUIntPtrMult(
  [in]  UINT_PTR uMultiplicand,
  [in]  UINT_PTR uMultiplier,
  [out] UINT_PTR *puResult
);
View the official Windows Driver Kit DDI reference

NtDoc

No description available.

Edit description on GitHub

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

RtlUIntPtrMult function

Description

Multiplies one value of type UINT_PTR by another.

Parameters

`uMultiplicand` [in]

The value to be multiplied by uMultiplier.

`uMultiplier` [in]

The value by which to multiply uMultiplicand.

`puResult` [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.

This function uses the following alternate name:

View the official Windows Driver Kit DDI reference