com.sun.tools.javac.jvm
Class CRTable

java.lang.Object
  com.sun.tools.javac.jvm.CRTable

All Implemented Interfaces:

CRTFlags

public class CRTable
extends java.lang.Object
implements CRTFlags

This class contains the CharacterRangeTable for some method and the hashtable for mapping trees or lists of trees to their ending positions.

This is NOT part of any API supported by Sun Microsystems. If you write code that depends on this, you do so at your own risk. This code and its internal interfaces are subject to change or deletion without notice.

Nested Class Summary

(package private) static class	CRTable.CRTEntry This class contains a CharacterRangeTableEntry.
(package private) class	CRTable.SourceComputer This class contains methods to compute source positions for trees.
(package private) static class	CRTable.SourceRange This class contains source positions for some tree or list of trees.

Field Summary

private boolean	crtDebug
private java.util.Map<JCTree,java.lang.Integer>	endPositions The hashtable for ending positions stored in the parser.
private ListBuffer<CRTable.CRTEntry>	entries The list of CRTable entries.
(package private) JCTree.JCMethodDecl	methodTree The tree of the method this table is intended for.
private java.util.Map<java.lang.Object,CRTable.SourceRange>	positions The hashtable for source positions.

Fields inherited from interface com.sun.tools.javac.jvm.CRTFlags

CRT_ASSIGNMENT, CRT_BLOCK, CRT_BRANCH_FALSE, CRT_BRANCH_TRUE, CRT_CREATE, CRT_FLOW_CONTROLLER, CRT_FLOW_TARGET, CRT_INVOKE, CRT_STATEMENT, CRT_VALID_FLAGS

Constructor Summary

CRTable(JCTree.JCMethodDecl tree, java.util.Map<JCTree,java.lang.Integer> endPositions)
Constructor

Method Summary

private int	encodePosition(int pos, Position.LineMap lineMap, Log log) Source file positions in CRT are integers in the format: line-number << LINESHIFT + column-number
private java.lang.String	getTypes(int flags) Return string describing flags enabled.
int	length() Return the number of the entries.
void	put(java.lang.Object tree, int flags, int startPc, int endPc) Create a new CRTEntry and add it to the entries.
int	writeCRT(ByteBuffer databuf, Position.LineMap lineMap, Log log) Compute source positions and write CRT to the databuf.

Methods inherited from class java.lang.Object

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

Field Detail

crtDebug

private final boolean crtDebug

See Also:

Constant Field Values

entries

private ListBuffer<CRTable.CRTEntry> entries

The list of CRTable entries.

positions

private java.util.Map<java.lang.Object,CRTable.SourceRange> positions

The hashtable for source positions.

endPositions

private java.util.Map<JCTree,java.lang.Integer> endPositions

The hashtable for ending positions stored in the parser.

methodTree

JCTree.JCMethodDecl methodTree

The tree of the method this table is intended for. We should traverse this tree to get source ranges.

Constructor Detail

CRTable

public CRTable(JCTree.JCMethodDecl tree,
               java.util.Map<JCTree,java.lang.Integer> endPositions)

Constructor

Method Detail

put

public void put(java.lang.Object tree,
                int flags,
                int startPc,
                int endPc)

Create a new CRTEntry and add it to the entries.

Parameters:

tree - The tree or the list of trees for which we are storing the code pointers.

flags - The set of flags designating type of the entry.

startPc - The starting code position.

endPc - The ending code position.

writeCRT

public int writeCRT(ByteBuffer databuf,
                    Position.LineMap lineMap,
                    Log log)

Compute source positions and write CRT to the databuf.

Parameters:

databuf - The buffer to write bytecodes to.

length

public int length()

Return the number of the entries.

getTypes

private java.lang.String getTypes(int flags)

Return string describing flags enabled.

encodePosition

private int encodePosition(int pos,
                           Position.LineMap lineMap,
                           Log log)

Source file positions in CRT are integers in the format: line-number << LINESHIFT + column-number