can't compile log4j by Ant

[Takashi Okamoto]

Hi, Kaffe!!

I have following error when compile jakarta-log4j by ant-1.3 with Kaffe.

--------------
BUILD FAILED

java.lang.OutOfMemoryError
        at java.lang.StringBuffer.ensureCapacity(StringBuffer.java:162)
        at java.lang.StringBuffer.setLength(StringBuffer.java:264)
        at org.apache.tools.ant.util.SourceFileScanner.restrict(SourceFileScanner.java:128)
        at org.apache.tools.ant.util.SourceFileScanner.restrictAsFiles(SourceFileScanner.java:174)
        at org.apache.tools.ant.taskdefs.Javac.scanDir(Javac.java:488)
        at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:434)
        at org.apache.tools.ant.Target.execute(Target.java:153)
        at org.apache.tools.ant.Project.runTarget(Project.java:902)
        at org.apache.tools.ant.Project.executeTarget(Project.java:540)
        at org.apache.tools.ant.Project.executeTargets(Project.java:514)
        at org.apache.tools.ant.Main.runBuild(Main.java:421)
        at org.apache.tools.ant.Main.main(Main.java:149)

Total time: 27 seconds
--------------

I looked for the cause.  Maybe following code has problem.

[libraries/javalib/java/lang/StringBuffer.java]

----

// This method assumes synchronization
private boolean ensureCapacity(int minCapacity, boolean forceNew) {

	// Do we really need to create a new buffer?
	if (!forceNew && minCapacity <= buffer.length) {
		return false; 
	}

	// Increase buffer size in powers of two to avoid O(n^2) behavior
	if (minCapacity < used) {
		minCapacity = used;
	} else if (minCapacity < buffer.length * 2 + 2) {
		minCapacity = buffer.length * 2 + 2;
	}

	// Allocate a new buffer and copy data over
	char[] newBuffer = new char[minCapacity];
	System.arraycopy(buffer, 0, newBuffer, 0, used);
	buffer = newBuffer;
	isStringized = false;
	return true;
}
	.
     --snip--	
	.

public synchronized void setLength(int newLength) {
	if (newLength < 0) {
		throw new StringIndexOutOfBoundsException();
	}
	boolean newBuf = ensureCapacity(newLength,
	    isStringized || newLength < buffer.length / 2);
	if (!newBuf && newLength > used) {
		for (int index = used; index < newLength; index++)
			buffer[index] = '\0';
	}
	used = newLength;
}

----

Second argument of ensureCapacity() shows flag to create new buffer.
I suspect following code:

	boolean newBuf = ensureCapacity(newLength,
	    isStringized || newLength < buffer.length / 2);

New buffer should be created when StringBuffer has real string already
(isStringized is true) and new buffer length (newLength) is larger
than obsoleted buffer length (buffer.length). 

So, I suggest following code (java.lang.StringBuffer.java):

	boolean newBuf = ensureCapacity(newLength,
	    isStringized && ( newLength > buffer.length ));

I can't say certainly, but above code works fine with Ant.
Could you fix it?

regards.
-----------------
Takashi Okamoto