xref: /external/parameter-framework/parameter/BitParameter.cpp

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 * <FILENAME>
 *
 * INTEL CONFIDENTIAL
 * Copyright © 2011 Intel
 * Corporation All Rights Reserved.
 *
 * The source code contained or described herein and all documents related to
 * the source code ("Material") are owned by Intel Corporation or its suppliers
 * or licensors. Title to the Material remains with Intel Corporation or its
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 * Material is protected by worldwide copyright and trade secret laws and
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 * modified, published, uploaded, posted, transmitted, distributed, or
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 * property right is granted to or conferred upon you by disclosure or delivery
 * of the Materials, either expressly, by implication, inducement, estoppel or
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 * express and approved by Intel in writing.
 *
 *  AUTHOR: Patrick Benavoli (patrickx.benavoli@intel.com)
 * CREATED: 2011-06-01
 * UPDATED: 2011-07-27
 *
 *
 * </auto_header>
 */
#include "BitParameter.h"
#include "BitParameterType.h"
#include "ParameterAccessContext.h"
#include "ConfigurationAccessContext.h"
#include "ParameterBlackboard.h"
#include "BitParameterBlock.h"

#define base CInstanceConfigurableElement

CBitParameter::CBitParameter(const string& strName, const CTypeElement* pTypeElement) : base(strName, pTypeElement)
{
}

// Type
CInstanceConfigurableElement::Type CBitParameter::getType() const
{
    return EBitParameter;
}

// Size
uint32_t CBitParameter::getSize() const
{
    return static_cast<const CBitParameterBlock*>(getParent())->getSize();
}

// XML configuration settings parsing/composing
bool CBitParameter::serializeXmlSettings(CXmlElement& xmlConfigurableElementSettingsElement, CConfigurationAccessContext& configurationAccessContext) const
{
    // Handle access
    if (!configurationAccessContext.serializeOut()) {

        // Write to blackboard
        if (!doSetValue(xmlConfigurableElementSettingsElement.getTextContent(), getOffset() - configurationAccessContext.getBaseOffset(), configurationAccessContext)) {

            // Append parameter path to error
            configurationAccessContext.appendToError(" " + getPath());

            return false;
        }
    } else {

        // Get string value
        string strValue;

        doGetValue(strValue, getOffset() - configurationAccessContext.getBaseOffset(), configurationAccessContext);

        // Populate value into xml text node
        xmlConfigurableElementSettingsElement.setTextContent(strValue);
    }

    // Done
    return true;
}

uint32_t CBitParameter::getFootPrint() const
{
    // Allocation made on parent side
    return 0;
}

// Dump
void CBitParameter::logValue(string& strValue, CErrorContext& errorContext) const
{
    CParameterAccessContext& parameterContext = static_cast<CParameterAccessContext&>(errorContext);

    // Dump value
    doGetValue(strValue, getOffset(), parameterContext);
}

// Parameter Access
bool CBitParameter::setValue(CPathNavigator& pathNavigator, const string& strValue, CErrorContext& errorContext) const
{
    // Check path validity
    if (!checkPathExhausted(pathNavigator, errorContext)) {

        return false;
    }
    // Parameter context
    CParameterAccessContext& parameterContext = static_cast<CParameterAccessContext&>(errorContext);

    // Set Value
    if (!doSetValue(strValue, getOffset(), parameterContext)) {

        // Append parameter path to error
        parameterContext.appendToError(" " + getPath());

        return false;
    }
    // Synchronize
    if (!sync(parameterContext)) {

        // Append parameter path to error
        parameterContext.appendToError(" " + getPath());

        return false;
    }
    return true;
}

bool CBitParameter::getValue(CPathNavigator& pathNavigator, string& strValue, CErrorContext& errorContext) const
{
    // Check path validity
    if (!checkPathExhausted(pathNavigator, errorContext)) {

        return false;
    }
    // Parameter context
    CParameterAccessContext& parameterContext = static_cast<CParameterAccessContext&>(errorContext);

    // Get Value
    doGetValue(strValue, getOffset(), parameterContext);

    return true;
}

bool CBitParameter::doSetValue(const string& strValue, uint32_t uiOffset, CParameterAccessContext& parameterAccessContext) const
{
    uint32_t uiData = 0;

    // Read/modify/write
    CParameterBlackboard* pBlackboard = parameterAccessContext.getParameterBlackboard();

    // Beware this code works on little endian architectures only!
    pBlackboard->read(&uiData, getSize(), uiOffset, parameterAccessContext.isBigEndianSubsystem());

    // Convert
    if (!static_cast<const CBitParameterType*>(getTypeElement())->asInteger(strValue, uiData, parameterAccessContext)) {

        return false;
    }
    // Write blackboard
    pBlackboard->write(&uiData, getSize(), uiOffset, parameterAccessContext.isBigEndianSubsystem());

    return true;
}

void CBitParameter::doGetValue(string& strValue, uint32_t uiOffset, CParameterAccessContext& parameterAccessContext) const
{
    uint32_t uiData = 0;

    // Read blackboard
    CParameterBlackboard* pBlackboard = parameterAccessContext.getParameterBlackboard();

    // Beware this code works on little endian architectures only!
    pBlackboard->read(&uiData, getSize(), uiOffset, parameterAccessContext.isBigEndianSubsystem());

    // Convert
    static_cast<const CBitParameterType*>(getTypeElement())->asString(uiData, strValue);
}