Commit 7518c2a1 authored by Andrea Bulgarelli's avatar Andrea Bulgarelli
Browse files

management of real double precision (PartOfPacket)

parent b44aff88

include/PartOfPacket.h

+36 −0
Original line number Diff line number Diff line
@@ -103,6 +103,23 @@ public: 
    /// \param index Represent the index of the field.

    virtual float getFieldValue_5_1(word index);

    

    /// Returns the value of a field in the list of fields of this part of packet.

    /// The value returned is interpreted as a real double precision (IEEE 754).

    /// The index of the argument is the first 16 bit field of the 4 fields that compound

    /// the 64 bit real double precision. The layout foreseen is the following:

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

    /// -	float last 16 bits	-	the index passed as argument

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

    /// -	float third 16 bits	-	the index + 1

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

    /// -	float second 16 bits	-	the index + 1

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

    /// -	float first 16 bits	-	the index + 1

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

    /// This corresponds with the PTC=5, PFC = 2.

    /// \param index Represent the index of the field.

    virtual double getFieldValue_5_2(word index);



    /// Set the value of a field. The value is interpreted as a real single

    /// precision (IEEE 754).

    /// The index of the argument is the first 16 bit field of the 2 fields that compound
@@ -118,6 +135,25 @@ public: 
    /// \param value The real single precision value

    virtual void setFieldValue_5_1(word index, float value);

    

    /// Set the value of a field. The value is interpreted as a real double

    /// precision (IEEE 754).

    /// The index of the argument is the first 16 bit field of the 4 fields that compound

    /// the 64 bit real double precision. The layout foreseen is the following:

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

    /// -	float last 16 bits	-	the index passed as argument

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

    /// -	float third 16 bits	-	the index + 1

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

    /// -	float second 16 bits	-	the index + 1

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

    /// -	float first 16 bits	-	the index + 1

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

    /// This corresponds with the PTC=5, PFC = 2.

    /// See setFieldValue(word index, word value) for general considerations.

    /// \param index Represent the index of the field.

    /// \param value The real double precision value

    virtual void setFieldValue_5_2(word index, double value);



    /// Returns the value of a field in the list of fields of this part of packet.

    /// The value returned is interpreted as a 32 bit signed integer.

    /// The index of the argument is the first 16 bit field of the 2 fields that compound

packetlib.bbprojectd/bulgarelli.bbprojectsettings

+787 −31

File changed.

Preview size limit exceeded, changes collapsed.

src/PartOfPacket.cpp

+49 −2
Original line number Diff line number Diff line
@@ -463,14 +463,33 @@ float PartOfPacket::getFieldValue_5_1(word index) 
    union u_tag

    {

    	/// 32 bit

        unsigned long i;

        dword i;

        /// 32 bit single precision

        float f;	

    } u;

    u.i = (getFieldValue(index) << 16) | getFieldValue(index + 1);

    u.i =  ( (dword) getFieldValue(index) << 16) | ( (dword) getFieldValue(index + 1) );

    return u.f;

}



double PartOfPacket::getFieldValue_5_2(word index)

{

	if(sizeof(unsigned long) == 4) {

		//TODO

		cout << "this does not work in a 32 bit system" << endl;

		exit(0);

	}

		

    union u_tag

    {

    	/// 64 bit for 64 bit os)

        unsigned long i;

        /// 64 bit double precision

        double d;	

    } u;

    u.i = (unsigned long) ( (unsigned long)  getFieldValue(index) << (48)) | ( (unsigned long) getFieldValue(index + 1) << (32)) | ( (unsigned long) getFieldValue(index + 2) << (16)) | ( (unsigned long) getFieldValue(index + 3) );

    return u.d;

}



void PartOfPacket::setFieldValue_5_1(word index, float value)

{

    union u_tag
@@ -488,6 +507,34 @@ void PartOfPacket::setFieldValue_5_1(word index, float value) 
    setFieldValue(index + 1, w);

}



void PartOfPacket::setFieldValue_5_2(word index, double value)

{

    if(sizeof(unsigned long) == 4) {

		//TODO

		cout << "this does not work in a 32 bit system" << endl;

		exit(0);

	}

		

    union u_tag

    {

    	/// 64 bit for 64 bit os)

        unsigned long i;

        /// 64 bit double precision

        double d;	

    } u;

    

    word w;

    u.d = value;

    w = (word)( (u.i >> 48) );

    setFieldValue(index, w);

    w = (word)( 0xFFFF &  (u.i >> 32) );

    setFieldValue(index + 1, w);

    w = (word)( 0xFFFF &  (u.i >> 16) );

    setFieldValue(index + 2, w);

    w = (word)(0xFFFF & u.i);

    setFieldValue(index + 3, w);

}



signed long PartOfPacket::getFieldValue_4_14(word index)

{

    long l;