org.vishia.byteData

Class PositionElementInStruct

java.lang.Object

org.vishia.byteData.PositionElementInStruct

public class PositionElementInStruct
extends java.lang.Object

This class helps to count positions in structures for Boolean bits, bytes. It is able to use for conversion of structure descriptions from C-Headers and from SCL (S7-Programming, Simatic).

Field Summary

Fields

Modifier and Type	Field and Description
private int	ixBit Positions of elements within the Variable of the FB, DB or UDT.
private int	ixByte Positions of elements within the Variable of the FB, DB or UDT.

Constructor Summary

Constructors

Constructor and Description
PositionElementInStruct()

Method Summary

Modifier and Type	Method and Description
void	adjustNonBool(int sizeForAlign) Adjusts the position if the next element has a size, which requests a new align.
int	getIxBit()
int	getIxByte()
int	getMaskBit()
void	incrPos(int arrayStartIx, int arrayEndIx, int nrofBytesElement) Increments the position because a variable is processed.
void	incrPosInOriginalDb(int arrayStartIx, int arrayEndIx, int nrofBytesElement) Deprecated. see incrPos(int, int, int).
void	setStartPos(int pos)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ixByte

private int ixByte

Positions of elements within the Variable of the FB, DB or UDT. There are set to the start position if the #generateOneSclFile(String, VariablenBlock)- routine is started. Then there are incremented depending of the parse result of the variables in the SCL-File, see #incrPosInOriginalDb(ZbnfVariable, TypeConversion).

ixBit

private int ixBit

Positions of elements within the Variable of the FB, DB or UDT. There are set to the start position if the #generateOneSclFile(String, VariablenBlock)- routine is started. Then there are incremented depending of the parse result of the variables in the SCL-File, see #incrPosInOriginalDb(ZbnfVariable, TypeConversion).

Constructor Detail

PositionElementInStruct

public PositionElementInStruct()

Method Detail

getIxByte

public int getIxByte()

getIxBit

public int getIxBit()

getMaskBit

public int getMaskBit()

setStartPos

public void setStartPos(int pos)

adjustNonBool

public void adjustNonBool(int sizeForAlign)

Adjusts the position if the next element has a size, which requests a new align.

Parameters:

sizeForAlign - The size of the next element.

incrPosInOriginalDb

@Deprecated
public void incrPosInOriginalDb(int arrayStartIx,
                                             int arrayEndIx,
                                             int nrofBytesElement)

Deprecated. see incrPos(int, int, int).

Increments the position.

Parameters:

arrayStartIx -

arrayEndIx -

nrofBytesElement -

incrPos

public void incrPos(int arrayStartIx,
                    int arrayEndIx,
                    int nrofBytesElement)

Increments the position because a variable is processed.

Parameters:

arrayStartIx - maybe an array [start..end], usual 0

arrayEndIx - if it is an array, it have to be > arrayStartIx.

nrofBytesElement - 0 for a bit in word (S7: BOOL).1..4 for the basic types, if it is an array: the element size. Note that a bit array is possible, this parameter is 0, the (arrayStartIx - arrayEndIx +1) is the number of bits.