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RtlUInt8Sub function (ntintsafe.h)

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The RtlUInt8Sub routine subtracts one value of type UINT8 from another.

Syntax

NTSTATUS RtlUInt8Sub(
  [in]  UINT8 u8Minuend,
  [in]  UINT8 u8Subtrahend,
  [out] UINT8 *pu8Result
);

Parameters

[in] u8Minuend

The value from which u8Subtrahend is subtracted.

[in] u8Subtrahend

The value to subtract from u8Minuend.

[out] pu8Result

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

RtlUInt8Sub returns STATUS_SUCCESS if the routine is successful. Possible error return values include the following status code.

Return code Description
STATUS_INTEGER_OVERFLOW
 An arithmetic overflow occurred.

Remarks

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

Requirements

Requirement Value
Target Platform Desktop
Header ntintsafe.h