source: xplra/src/plugin/src/xplra/SetDataRefTask.h@ 13:42fd631176b7

// Copyright (c) 2013 by István Váradi

// This file is part of XPLRA, a remote-access plugin for X-Plane

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:

// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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#ifndef XPLRA_SETDATAREFTASK_H
#define XPLRA_SETDATAREFTASK_H
//------------------------------------------------------------------------------

#include "DataRefTask.h"

#include <hu/varadiistvan/scpl/io/DataStream.h>

//------------------------------------------------------------------------------

namespace xplra {

//------------------------------------------------------------------------------

/**
 * Base class for dataref tasks that set the value of some data
 * referenced by a dataref.
 *
 * Since XPLM provides no feedback on whether the setting is
 * successful, we detect only if the dataref is valid or not. So the
 * isValid() function provides the only feedback if the task executed
 * successfully or not. (We could use XPLMCanWriteDataRef, but for
 * efficiency reasons we refrain from it. A separate task may be
 * created for this purpose.)
 */
class SetDataRefTask : public DataRefTask
{
public:
    /**
     * Read a dataref setting specification and create the appropriate
     * SetDataRefTask instance.
     *
     * @param result will contain the result of the operation. It
     * signifies an error only, if some wrong data is read. If the
     * stream fails, it will indicate RESULT_OK.
     *
     * @return the new instance or 0 on error.
     */
    static SetDataRefTask* create(uint8_t& result, hu::varadiistvan::scpl::io::DataStream& stream);

    /**
     * Construct the task for the dataref with the given name.
     */
    SetDataRefTask(const std::string& name);

    /**
     * Construct the task for the given dataref.
     */
    SetDataRefTask(XPLMDataRef dataRef);

    /**
     * Read and set the value to update from the given stream
     */
    virtual void readValue(hu::varadiistvan::scpl::io::DataStream& stream) = 0;
};

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

/**
 * Base class for dataref setting tasks that set a single scalar
 * value.
 *
 * ConcreteClass is the actual child class. It should have a function
 * name setData() which performs the actual setting.
 */
template <typename T, class ConcreteClass>
class SetScalarDataRefTask : public SetDataRefTask
{
protected:
    /**
     * The value to set.
     */
    T value;

public:
    /**
     * Construct the task for setting the data referenced by the
     * dataref with the given name.
     */
    SetScalarDataRefTask(const std::string& name);

    /**
     * Construct the task for setting the data referenced by the given
     * dataref.
     */
    SetScalarDataRefTask(XPLMDataRef dataRef);

protected:
    /**
     * Perform the actual operation.
     */
    virtual void process();
};

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

/**
 * Task to set the value of an integer data.
 */
class SetIntDataRefTask :
        public SetScalarDataRefTask<int, SetIntDataRefTask>
{
public:
    /**
     * Set the given dataref's value to the given value.
     */
    static void setData(XPLMDataRef dataRef, int value);

    /**
     * Construct the task for the dataref with the given name.
     */
    SetIntDataRefTask(const std::string& name);

    /**
     * Construct the task for the given dataref.
     */
    SetIntDataRefTask(XPLMDataRef dataRef);

    /**
     * Read and set the value to update from the given stream
     */
    virtual void readValue(hu::varadiistvan::scpl::io::DataStream& stream);
};

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

/**
 * Task to set the value of a single-precision floating point data.
 */
class SetFloatDataRefTask :
        public SetScalarDataRefTask<float, SetFloatDataRefTask>
{
public:
    /**
     * Set the given dataref's value to the given value.
     */
    static void setData(XPLMDataRef dataRef, float value);

    /**
     * Construct the task for the dataref with the given name.
     */
    SetFloatDataRefTask(const std::string& name);

    /**
     * Construct the task for the given dataref.
     */
    SetFloatDataRefTask(XPLMDataRef dataRef);

    /**
     * Read and set the value to update from the given stream
     */
    virtual void readValue(hu::varadiistvan::scpl::io::DataStream& stream);
};

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

/**
 * Task to set the value of a double-precision floating point data.
 */
class SetDoubleDataRefTask :
        public SetScalarDataRefTask<double, SetDoubleDataRefTask>
{
public:
    /**
     * Set the given dataref's value to the given value.
     */
    static void setData(XPLMDataRef dataRef, double value);

    /**
     * Construct the task for the dataref with the given name.
     */
    SetDoubleDataRefTask(const std::string& name);

    /**
     * Construct the task for the given dataref.
     */
    SetDoubleDataRefTask(XPLMDataRef dataRef);

    /**
     * Read and set the value to update from the given stream
     */
    virtual void readValue(hu::varadiistvan::scpl::io::DataStream& stream);
};

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

/**
 * Base class for dataref setting tasks that set the values of an
 * array.
 *
 * ConcreteClass is the actual child class. It should have a function
 * name setData() which performs the actual setting.
 */
template <typename T, class ConcreteClass>
class SetArrayDataRefTask : public SetDataRefTask
{
private:
    /**
     * The number of data items in the value.
     */
    int count;

    /**
     * The offset starting with which the data should be set.
     */
    int offset;

    /**
     * The value to set.
     */
    T* value;

public:
    /**
     * Construct the data setting task for the dataref with the given
     * name.
     *
     * The value array will be allocated, but not filled with
     * data. Thus count should be positive!
     */
    SetArrayDataRefTask(const std::string& name, int count, int offset = 0);

    /**
     * Construct the data setting task for the given dataref.
     *
     * The value array will be allocated, but not filled with
     * data. Thus count should be positive!
     */
    SetArrayDataRefTask(XPLMDataRef dataRef, int count, int offset = 0);

    /**
     * Destroy the task.
     */
    virtual ~SetArrayDataRefTask();

    /**
     * Read and set the value to update from the given stream
     */
    virtual void readValue(hu::varadiistvan::scpl::io::DataStream& stream);

protected:
    /**
     * Perform the actual operation.
     */
    virtual void process();
};

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

/**
 * A dataref setting task which sets an array of integers.
 */
class SetIntArrayDataRefTask :
    public SetArrayDataRefTask<int, SetIntArrayDataRefTask>
{
public:
    /**
     * Perform the actual setting.
     */
    static void setData(XPLMDataRef dataRef, int* value, int count, int offset);

    /**
     * Construct the task for the dataref with the given name.
     */
    SetIntArrayDataRefTask(const std::string& name, int count, int offset = 0);

    /**
     * Construct the task for the given dataref.
     */
    SetIntArrayDataRefTask(XPLMDataRef dataRef, int count, int offset = 0);
};

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

/**
 * A dataref setting task which sets an array of single-precision
 * floating-point values.
 */
class SetFloatArrayDataRefTask :
    public SetArrayDataRefTask<float, SetFloatArrayDataRefTask>
{
public:
    /**
     * Perform the actual setting.
     */
    static void setData(XPLMDataRef dataRef, float* value, int count, int offset);

    /**
     * Construct the task for the dataref with the given name.
     */
    SetFloatArrayDataRefTask(const std::string& name, int count, int offset = 0);

    /**
     * Construct the task for the given dataref.
     */
    SetFloatArrayDataRefTask(XPLMDataRef dataRef, int count, int offset = 0);
};

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

/**
 * A dataref setting task which sets an array of bytes.
 */
class SetByteArrayDataRefTask :
    public SetArrayDataRefTask<unsigned char, SetByteArrayDataRefTask>
{
public:
    /**
     * Perform the actual setting.
     */
    static void setData(XPLMDataRef dataRef, unsigned char* value,
                        int count, int offset);

    /**
     * Construct the task for the dataref with the given name.
     */
    SetByteArrayDataRefTask(const std::string& name, int count, int offset = 0);

    /**
     * Construct the task for the given dataref.
     */
    SetByteArrayDataRefTask(XPLMDataRef dataRef, int count, int offset = 0);
};

//------------------------------------------------------------------------------
// Template definitions
//------------------------------------------------------------------------------

template <typename T, class ConcreteClass>
inline SetScalarDataRefTask<T, ConcreteClass>::
SetScalarDataRefTask(const std::string& name) :
    SetDataRefTask(name)
{
}

//------------------------------------------------------------------------------

template <typename T, class ConcreteClass>
inline SetScalarDataRefTask<T, ConcreteClass>::
SetScalarDataRefTask(XPLMDataRef dataRef) :
    SetDataRefTask(dataRef)
{
}

//------------------------------------------------------------------------------

template <typename T, class ConcreteClass>
void SetScalarDataRefTask<T, ConcreteClass>::process()
{
    ConcreteClass::setData(getDataRef(), value);
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

template <typename T, class ConcreteClass>
inline SetArrayDataRefTask<T, ConcreteClass>::
SetArrayDataRefTask(const std::string& name, int count, int offset) :
    SetDataRefTask(name),
    count(count),
    offset(offset),
    value(new T[count])
{
}

//------------------------------------------------------------------------------

template <typename T, class ConcreteClass>
inline SetArrayDataRefTask<T, ConcreteClass>::
SetArrayDataRefTask(XPLMDataRef dataRef, int count, int offset) :
    SetDataRefTask(dataRef),
    count(count),
    offset(offset),
    value(new T[count])
{
}

//------------------------------------------------------------------------------

template <typename T, class ConcreteClass>
inline SetArrayDataRefTask<T, ConcreteClass>::~SetArrayDataRefTask()
{
    delete [] value;
}

//------------------------------------------------------------------------------

template <typename T, class ConcreteClass>
void SetArrayDataRefTask<T, ConcreteClass>::
readValue(hu::varadiistvan::scpl::io::DataStream& stream)
{
    stream.read(value, count * sizeof(T));
}

//------------------------------------------------------------------------------

template <typename T, class ConcreteClass>
void SetArrayDataRefTask<T, ConcreteClass>::process()
{
    ConcreteClass::setData(getDataRef(), value, count, offset);
}

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

inline SetDataRefTask::SetDataRefTask(const std::string& name) :
    DataRefTask(name)
{
}

//------------------------------------------------------------------------------

inline SetDataRefTask::SetDataRefTask(XPLMDataRef dataRef) :
    DataRefTask(dataRef)
{
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

inline void SetIntDataRefTask::setData(XPLMDataRef dataRef, int value)
{
    XPLMSetDatai(dataRef, value);
}

//------------------------------------------------------------------------------

inline SetIntDataRefTask::SetIntDataRefTask(const std::string& name) :
    SetScalarDataRefTask<int, SetIntDataRefTask>(name)
{
}

//------------------------------------------------------------------------------

inline SetIntDataRefTask::SetIntDataRefTask(XPLMDataRef dataRef) :
    SetScalarDataRefTask<int, SetIntDataRefTask>(dataRef)
{
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

inline void SetFloatDataRefTask::setData(XPLMDataRef dataRef, float value)
{
    XPLMSetDatai(dataRef, value);
}

//------------------------------------------------------------------------------

inline SetFloatDataRefTask::SetFloatDataRefTask(const std::string& name) :
    SetScalarDataRefTask<float, SetFloatDataRefTask>(name)
{
}

//------------------------------------------------------------------------------

inline SetFloatDataRefTask::SetFloatDataRefTask(XPLMDataRef dataRef) :
    SetScalarDataRefTask<float, SetFloatDataRefTask>(dataRef)
{
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

inline void SetDoubleDataRefTask::setData(XPLMDataRef dataRef, double value)
{
    XPLMSetDatai(dataRef, value);
}

//------------------------------------------------------------------------------

inline SetDoubleDataRefTask::SetDoubleDataRefTask(const std::string& name) :
    SetScalarDataRefTask<double, SetDoubleDataRefTask>(name)
{
}

//------------------------------------------------------------------------------

inline SetDoubleDataRefTask::SetDoubleDataRefTask(XPLMDataRef dataRef) :
    SetScalarDataRefTask<double, SetDoubleDataRefTask>(dataRef)
{
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

inline void SetIntArrayDataRefTask::setData(XPLMDataRef dataRef, int* value,
                                            int count, int offset)
{
    XPLMSetDatavi(dataRef, value, offset, count);
}

//------------------------------------------------------------------------------

inline SetIntArrayDataRefTask::SetIntArrayDataRefTask(const std::string& name,
                                                      int count, int offset) :
    SetArrayDataRefTask<int, SetIntArrayDataRefTask>(name, count, offset)
{
}

//------------------------------------------------------------------------------

inline SetIntArrayDataRefTask::SetIntArrayDataRefTask(XPLMDataRef dataRef,
                                                      int count, int offset) :
    SetArrayDataRefTask<int, SetIntArrayDataRefTask>(dataRef, count, offset)
{
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

inline void SetFloatArrayDataRefTask::setData(XPLMDataRef dataRef,
                                              float* value,
                                              int count, int offset)
{
    XPLMSetDatavf(dataRef, value, offset, count);
}

//------------------------------------------------------------------------------

inline
SetFloatArrayDataRefTask::SetFloatArrayDataRefTask(const std::string& name,
                                                   int count, int offset) :
    SetArrayDataRefTask<float, SetFloatArrayDataRefTask>(name, count, offset)
{
}

//------------------------------------------------------------------------------

inline
SetFloatArrayDataRefTask::SetFloatArrayDataRefTask(XPLMDataRef dataRef,
                                                   int count, int offset) :
    SetArrayDataRefTask<float, SetFloatArrayDataRefTask>(dataRef, count, offset)
{
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

inline void SetByteArrayDataRefTask::setData(XPLMDataRef dataRef,
                                             unsigned char* value,
                                             int count, int offset)
{
    XPLMSetDatab(dataRef, value, offset, count);
}

//------------------------------------------------------------------------------

inline
SetByteArrayDataRefTask::SetByteArrayDataRefTask(const std::string& name,
                                                 int count, int offset) :
    SetArrayDataRefTask<unsigned char, SetByteArrayDataRefTask>(name,
                                                                count, offset)
{
}

//------------------------------------------------------------------------------

inline
SetByteArrayDataRefTask::SetByteArrayDataRefTask(XPLMDataRef dataRef,
                                                 int count, int offset) :
    SetArrayDataRefTask<unsigned char, SetByteArrayDataRefTask>(dataRef,
                                                                count, offset)
{
}

//------------------------------------------------------------------------------

} /* namespace xplra */

//------------------------------------------------------------------------------
#endif // XPLRA_SETDATAREFTASK_H

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