Deflater.needsInput() Always returns true

[lechiefe]

I am trying to replace the default JVM Deflater class with the IntelDeflater.

The logic is straight-forward and works perfectly on the default Deflater, however simply swapping it for the Intel version results in the needsInput() method always returning true, no matter how many times the set input method has been called.

def.setInput(buffer, off + idx, writeSize);
     while(!def.needsInput()) {
         //Unreachable code
     }

Perhaps there is a difference in the api that I am missing? Any insight is appreciated.

[lechiefe]

Update: It would appear that this line in the Deflater class is responsible:

 @Override
    public void setInput(byte[] b, int off, int len) {
        if(lz_stream == 0) reset();

In case its helpful, I am using Linux 6.1.31-2-MANJARO

[mateuszsnowak]

Currently GKL does not fully implement Java Deflater and Inflater API. As of current version 0.8.10 and soon to be released version 0.8.11 GKL supports only a subset of methods from those API, for details please look into IntelDeflater and IntelInflater classes.

Full support of Java Deflater and Inflater API is planned at a later date.

[lechiefe]

I see, thanks for the quick reply, could you keep this issue open? I would like to get a notification when this support is rolled out.

[mateuszsnowak]

I will leave this issue open until implementation is complete.