/** INTN Subtraction Performs the requested operation using the input parameters into a value specified by Result type and stores the converted value into the caller allocated output buffer specified by Result. The caller must pass in a Result buffer that is at least as large as the Result type. If Result is NULL, RETURN_INVALID_PARAMETER is returned. If the requested operation results in an overflow or an underflow condition, then Result is set to INTN_ERROR and RETURN_BUFFER_TOO_SMALL is returned. @param[in] Minuend A number from which another is to be subtracted. @param[in] Subtrahend A number to be subtracted from another @param[out] Result Pointer to the result of subtraction @retval RETURN_SUCCESS Successful subtraction @retval RETURN_BUFFER_TOO_SMALL Underflow @retval RETURN_INVALID_PARAMETER Result is NULL **/ RETURN_STATUS EFIAPI SafeIntnSub ( IN INTN Minuend, IN INTN Subtrahend, OUT INTN *Result ) { return SafeInt64Sub ((INT64)Minuend, (INT64)Subtrahend, (INT64 *)Result); }
/** INTN Subtraction Performs the requested operation using the input parameters into a value specified by Result type and stores the converted value into the caller allocated output buffer specified by Result. The caller must pass in a Result buffer that is at least as large as the Result type. If Result is NULL, RETURN_INVALID_PARAMETER is returned. If the requested operation results in an overflow or an underflow condition, then Result is set to INTN_ERROR and RETURN_BUFFER_TOO_SMALL is returned. @param[in] Minuend A number from which another is to be subtracted. @param[in] Subtrahend A number to be subtracted from another @param[out] Result Pointer to the result of subtraction @retval RETURN_SUCCESS Successful subtraction @retval RETURN_BUFFER_TOO_SMALL Underflow @retval RETURN_INVALID_PARAMETER Result is NULL **/ RETURN_STATUS EFIAPI SafeIntnSub ( IN INTN Minuend, IN INTN Subtrahend, OUT INTN *Result ) { if (sizeof (UINTN) == sizeof (UINT32)) { return SafeInt64ToIntn (((INT64)Minuend) - ((INT64)Subtrahend), Result); } return SafeInt64Sub ((INT64)Minuend, (INT64)Subtrahend, (INT64 *)Result); }