RtlLongPtrToIntPtr - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
#ifndef _NTINTSAFE_H_INCLUDED_
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM | WINAPI_PARTITION_GAMES)

//
// LONG_PTR -> INT_PTR conversion
//
_Must_inspect_result_
__inline
NTSTATUS
RtlLongPtrToIntPtr(
    _In_ LONG_PTR lOperand,
    _Out_ _Deref_out_range_(==, lOperand) INT_PTR* piResult)
{
    C_ASSERT(sizeof(LONG_PTR) == sizeof(INT_PTR));
    *piResult = (INT_PTR)lOperand;
    return STATUS_SUCCESS;
}

#endif
#endif

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// ntintsafe.h

NTSTATUS RtlLongPtrToIntPtr(
  [in]  LONG_PTR lOperand,
  [out] INT_PTR  *piResult
);
View the official Windows Driver Kit DDI reference

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

RtlLongPtrToIntPtr function

Description

Converts a value of type LONG_PTR to a value of type INT_PTR.

Parameters

lOperand [in]

The value to be converted.

piResult [out]

A pointer to the converted value. In the case where the conversion causes a truncation of the original value, 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 type conversions and perform validity checks with minimal impact on performance.

This function uses the following alternate name:

View the official Windows Driver Kit DDI reference

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