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      1 /*
      2  * Copyright (c) 2011-2014, Intel Corporation
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without modification,
      6  * are permitted provided that the following conditions are met:
      7  *
      8  * 1. Redistributions of source code must retain the above copyright notice, this
      9  * list of conditions and the following disclaimer.
     10  *
     11  * 2. Redistributions in binary form must reproduce the above copyright notice,
     12  * this list of conditions and the following disclaimer in the documentation and/or
     13  * other materials provided with the distribution.
     14  *
     15  * 3. Neither the name of the copyright holder nor the names of its contributors
     16  * may be used to endorse or promote products derived from this software without
     17  * specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     22  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
     23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     26  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 #include "BitwiseAreaConfiguration.h"
     31 #include "BitParameter.h"
     32 #include "Subsystem.h"
     33 
     34 #define base CAreaConfiguration
     35 
     36 CBitwiseAreaConfiguration::CBitwiseAreaConfiguration(
     37     const CConfigurableElement *pConfigurableElement, const CSyncerSet *pSyncerSet)
     38     : base(pConfigurableElement, pSyncerSet,
     39            static_cast<const CBitParameter *>(pConfigurableElement)->getBelongingBlockSize())
     40 {
     41 }
     42 
     43 // Blackboard copies
     44 void CBitwiseAreaConfiguration::copyTo(CParameterBlackboard *pToBlackboard, size_t offset) const
     45 {
     46     // Beware this code works on little endian architectures only!
     47     const CBitParameter *pBitParameter = static_cast<const CBitParameter *>(_pConfigurableElement);
     48 
     49     uint64_t uiSrcData = 0;
     50     uint64_t uiDstData = 0;
     51 
     52     /// Read/modify/write
     53 
     54     // Read dst blackboard
     55     pToBlackboard->readInteger(&uiDstData, pBitParameter->getBelongingBlockSize(), offset);
     56 
     57     // Read src blackboard
     58     _blackboard.readInteger(&uiSrcData, pBitParameter->getBelongingBlockSize(), 0);
     59 
     60     // Convert
     61     uiDstData = pBitParameter->merge(uiDstData, uiSrcData);
     62 
     63     // Write dst blackboard
     64     pToBlackboard->writeInteger(&uiDstData, pBitParameter->getBelongingBlockSize(), offset);
     65 }
     66 
     67 void CBitwiseAreaConfiguration::copyFrom(const CParameterBlackboard *pFromBlackboard, size_t offset)
     68 {
     69     // Beware this code works on little endian architectures only!
     70     const CBitParameter *pBitParameter = static_cast<const CBitParameter *>(_pConfigurableElement);
     71 
     72     uint64_t uiSrcData = 0;
     73     uint64_t uiDstData = 0;
     74 
     75     /// Read/modify/write
     76 
     77     // Read dst blackboard
     78     _blackboard.readInteger(&uiDstData, pBitParameter->getBelongingBlockSize(), 0);
     79 
     80     // Read src blackboard
     81     pFromBlackboard->readInteger(&uiSrcData, pBitParameter->getBelongingBlockSize(), offset);
     82 
     83     // Convert
     84     uiDstData = pBitParameter->merge(uiDstData, uiSrcData);
     85 
     86     // Write dst blackboard
     87     _blackboard.writeInteger(&uiDstData, pBitParameter->getBelongingBlockSize(), 0);
     88 }
     89