joeq.Class
Class jq_BytecodeMap

java.lang.Object
  joeq.Class.jq_BytecodeMap

public class jq_BytecodeMap
extends Object

This class implements a mapping from code offsets to bytecode indices.

Version:

$Id: jq_BytecodeMap.java 1931 2004-09-22 22:17:47Z joewhaley $

Author:

John Whaley

Constructor Summary

jq_BytecodeMap(int[] offset, int[] bytecode_index)
Constructs a new bytecode map, using the given code offset and bytecode index array.

Method Summary

int	getBytecodeIndex(int off) Returns the bytecode index corresponding to the given code offset, or -1 if the offset is out of range.

Methods inherited from class java.lang.Object

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

Constructor Detail

jq_BytecodeMap

public jq_BytecodeMap(int[] offset,
                      int[] bytecode_index)

Constructs a new bytecode map, using the given code offset and bytecode index array. The two arrays are co-indexed. Each entry in the code offset array corresponds to an inclusive start offset of the instructions corresponding to the bytecode index in the co-indexed bytecode array. The length of the two arrays must be equal.

Parameters:

offset - code offset array

bytecode_index - bytecode index array

Method Detail

getBytecodeIndex

public int getBytecodeIndex(int off)

Returns the bytecode index corresponding to the given code offset, or -1 if the offset is out of range.

Parameters:

off - code offset to match

Returns:

bytecode index for the code offset, or -1