Package de.inetsoftware.jwebassembly.module

Class BranchManager.BranchNode

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractList<E>

java.util.ArrayList<BranchManager.BranchNode>

de.inetsoftware.jwebassembly.module.BranchManager.BranchNode

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<BranchManager.BranchNode>, java.util.Collection<BranchManager.BranchNode>, java.util.List<BranchManager.BranchNode>, java.util.RandomAccess

Enclosing class:

BranchManager

private static class BranchManager.BranchNode
extends java.util.ArrayList<BranchManager.BranchNode>

Described a code branch/block node in a tree structure.

Field Summary

Fields

Modifier and Type	Field	Description
private int	continuePos	jump position for a CONTINUE in a loop
private java.lang.Object	data	Extra data depending of the operator.
private int	elseEndPos
private WasmBlockOperator	endOp
private int	endPos
private BranchManager.BranchNode	parent
private WasmBlockInstruction	startBlock	A instruction for which the return type must be calculated.
private int	startIdx	The position of the startBlock in the instructions
private WasmBlockOperator	startOp
private int	startPos

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor	Description
BranchNode(int startPos, int endPos, WasmBlockOperator startOp, WasmBlockOperator endOp)	Create a new description.
BranchNode(int startPos, int endPos, WasmBlockOperator startOp, WasmBlockOperator endOp, java.lang.Object data)	Create a new description.

Method Summary

Modifier and Type	Method	Description
void	add(int index, BranchManager.BranchNode node)
boolean	add(BranchManager.BranchNode node)
(package private) void	calculateBlockType(java.util.List<WasmInstruction> instructions)	Calculate the block type (return type).
private int	findEndInstruction(java.util.List<WasmInstruction> instructions, int idx)	Find the END instruction of the block.
(package private) int	handle(int codePosition, java.util.List<WasmInstruction> instructions, int idx, int lineNumber)	Handle branches on the current codePosition

Methods inherited from class java.util.ArrayList

addAll, addAll, clear, clone, contains, ensureCapacity, equals, forEach, get, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeIf, removeRange, replaceAll, retainAll, set, size, sort, spliterator, subList, toArray, toArray, trimToSize

Methods inherited from class java.util.AbstractCollection

containsAll, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, stream, toArray

Methods inherited from interface java.util.List

containsAll

Field Detail

startPos

private final int startPos

endPos

private int endPos

startOp

private final WasmBlockOperator startOp

endOp

private WasmBlockOperator endOp

data

private java.lang.Object data

Extra data depending of the operator. For example the return type of a block.

parent

private BranchManager.BranchNode parent

startBlock

private WasmBlockInstruction startBlock

A instruction for which the return type must be calculated.

startIdx

private int startIdx

The position of the startBlock in the instructions

elseEndPos

private int elseEndPos

continuePos

private int continuePos

jump position for a CONTINUE in a loop

Constructor Detail

BranchNode

BranchNode(int startPos,
           int endPos,
           WasmBlockOperator startOp,
           WasmBlockOperator endOp)

Create a new description.

Parameters:

startPos - the start position in the Java code. Limit also the children.

endPos - the end position in the Java code. Limit also the children.

startOp - The WASM operation on the start position. Can be null if there is nothing in WASM.

endOp - the WASM operation on the end position. Can be null if there is nothing in WASM.

BranchNode

BranchNode(int startPos,
           int endPos,
           WasmBlockOperator startOp,
           WasmBlockOperator endOp,
           java.lang.Object data)

Create a new description.

Parameters:

startPos - the start position in the Java code. Limit also the children.

endPos - the end position in the Java code. Limit also the children.

startOp - The WASM operation on the start position. Can be null if there is nothing in WASM.

endOp - the WASM operation on the end position. Can be null if there is nothing in WASM.

data - extra data depending of the start operator

Method Detail

add

public boolean add(BranchManager.BranchNode node)

Specified by:

add in interface java.util.Collection<BranchManager.BranchNode>

Specified by:

add in interface java.util.List<BranchManager.BranchNode>

Overrides:

add in class java.util.ArrayList<BranchManager.BranchNode>

add

public void add(int index,
                BranchManager.BranchNode node)

Specified by:

add in interface java.util.List<BranchManager.BranchNode>

Overrides:

add in class java.util.ArrayList<BranchManager.BranchNode>

handle

int handle(int codePosition,
           java.util.List<WasmInstruction> instructions,
           int idx,
           int lineNumber)

Handle branches on the current codePosition

Parameters:

codePosition - current code position

instructions - the target for instructions

idx - index in the current instruction

lineNumber - the line number in the Java source code

Returns:

the new index in the instructions

calculateBlockType

void calculateBlockType(java.util.List<WasmInstruction> instructions)

Calculate the block type (return type). The value type that is on the stack after the block.

Parameters:

instructions - the instructions of the function

findEndInstruction

private int findEndInstruction(java.util.List<WasmInstruction> instructions,
                               int idx)

Find the END instruction of the block.

Parameters:

instructions - the list of instructions

idx - the index of the block start

Returns:

the END index