RtlShortToDWordPtr - NtDoc

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

//
// SHORT -> DWORD_PTR conversion
//
_Must_inspect_result_
__inline
NTSTATUS
RtlShortToDWordPtr(
    _In_ SHORT sOperand,
    _Out_ _Deref_out_range_(==, sOperand) DWORD_PTR* pdwResult)
{
    NTSTATUS status;
    
    if (sOperand >= 0)
    {
        *pdwResult = (DWORD_PTR)sOperand;
        status = STATUS_SUCCESS;
    }
    else
    {
        *pdwResult = DWORD_PTR_ERROR;
        status = STATUS_INTEGER_OVERFLOW;
    }
    
    return status;
}

#endif
#endif
View code on GitHub