edu.internet2.middleware.grouperInstallerExt.org.tukaani.xz.BCJDecoder Maven / Gradle / Ivy
/*
* BCJDecoder
*
* Author: Lasse Collin
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
package edu.internet2.middleware.grouperInstallerExt.org.tukaani.xz;
import java.io.InputStream;
import edu.internet2.middleware.grouperInstallerExt.org.tukaani.xz.simple.*;
class BCJDecoder extends BCJCoder implements FilterDecoder {
private final long filterID;
private final int startOffset;
BCJDecoder(long filterID, byte[] props)
throws UnsupportedOptionsException {
assert isBCJFilterID(filterID);
this.filterID = filterID;
if (props.length == 0) {
startOffset = 0;
} else if (props.length == 4) {
int n = 0;
for (int i = 0; i < 4; ++i)
n |= (props[i] & 0xFF) << (i * 8);
startOffset = n;
} else {
throw new UnsupportedOptionsException(
"Unsupported BCJ filter properties");
}
}
public int getMemoryUsage() {
return SimpleInputStream.getMemoryUsage();
}
public InputStream getInputStream(InputStream in) {
SimpleFilter simpleFilter = null;
if (filterID == X86_FILTER_ID)
simpleFilter = new X86(false, startOffset);
else if (filterID == POWERPC_FILTER_ID)
simpleFilter = new PowerPC(false, startOffset);
else if (filterID == IA64_FILTER_ID)
simpleFilter = new IA64(false, startOffset);
else if (filterID == ARM_FILTER_ID)
simpleFilter = new ARM(false, startOffset);
else if (filterID == ARMTHUMB_FILTER_ID)
simpleFilter = new ARMThumb(false, startOffset);
else if (filterID == SPARC_FILTER_ID)
simpleFilter = new SPARC(false, startOffset);
else
assert false;
return new SimpleInputStream(in, simpleFilter);
}
}