/* Microsoft Reference Implementation for TPM 2.0
 *
 *  The copyright in this software is being made available under the BSD License,
 *  included below. This software may be subject to other third party and
 *  contributor rights, including patent rights, and no such rights are granted
 *  under this license.
 *
 *  Copyright (c) Microsoft Corporation
 *
 *  All rights reserved.
 *
 *  BSD License
 *
 *  Redistribution and use in source and binary forms, with or without modification,
 *  are permitted provided that the following conditions are met:
 *
 *  Redistributions of source code must retain the above copyright notice, this list
 *  of conditions and the following disclaimer.
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 *  Redistributions in binary form must reproduce the above copyright notice, this
 *  list of conditions and the following disclaimer in the documentation and/or
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 */
//** Description
// This file contains the miscellaneous functions for processing response codes.
// NOTE: Currently, there is only one.

//** Includes and Defines
#include "Tpm.h"

//** RcSafeAddToResult()
// Adds a modifier to a response code as long as the response code allows a modifier
// and no modifier has already been added.
TPM_RC
RcSafeAddToResult(
    TPM_RC          responseCode,
    TPM_RC          modifier
    )
{
    if((responseCode & RC_FMT1) && !(responseCode & 0xf40))
       return responseCode + modifier;
    else
        return responseCode;
}