/**

* This is code is released under the

* Apache License Version 2.0 http://www.apache.org/licenses/.

*

* (c) Daniel Lemire, http://lemire.me/en/

*/

/**

* Helper class to compose schemes.

*

* @author Daniel Lemire

*/

namespace CSharpFastPFOR

{

public class SkippableComposition : SkippableIntegerCODEC

{

private SkippableIntegerCODEC F1;

private SkippableIntegerCODEC F2;

/**

* Compose a scheme from a first one (f1) and a second one (f2). The first

* one is called first and then the second one tries to compress whatever

* remains from the first run.

*

* By convention, the first scheme should be such that if, during decoding,

* a 32-bit zero is first encountered, then there is no output.

*

* @param f1

* first codec

* @param f2

* second codec

*/

public SkippableComposition(SkippableIntegerCODEC f1, SkippableIntegerCODEC f2)

{

F1 = f1;

F2 = f2;

}

public void headlessCompress(int[] @in, IntWrapper inpos, int inlength, int[] @out, IntWrapper outpos)

{

int init = inpos.get();

F1.headlessCompress(@in, inpos, inlength, @out, outpos);

inlength -= inpos.get() - init;

F2.headlessCompress(@in, inpos, inlength, @out, outpos);

}

public void headlessUncompress(int[] @in, IntWrapper inpos, int inlength, int[] @out, IntWrapper outpos, int num)

{

int init = inpos.get();

F1.headlessUncompress(@in, inpos, inlength, @out, outpos, num);

inlength -= inpos.get() - init;

num -= outpos.get();

F2.headlessUncompress(@in, inpos, inlength, @out, outpos, num);

}

public override string ToString()

{

return F1 + "+" + F2;

}

}

}