/**
* Sets the preset dictionary. This should only be called, if needsDictionary() returns true and
* it should set the same dictionary, that was used for deflating. The getAdler() function returns
* the checksum of the dictionary needed.
*
* @param buffer the dictionary.
* @param off the offset into buffer where the dictionary starts.
* @param len the length of the dictionary.
* @exception IllegalStateException if no dictionary is needed.
* @exception IllegalArgumentException if the dictionary checksum is wrong.
* @exception IndexOutOfBoundsException if the off and/or len are wrong.
*/
public void setDictionary(byte[] buffer, int off, int len) {
if (!needsDictionary()) throw new IllegalStateException();
adler.update(buffer, off, len);
if ((int) adler.getValue() != readAdler)
throw new IllegalArgumentException("Wrong adler checksum");
adler.reset();
outputWindow.copyDict(buffer, off, len);
mode = DECODE_BLOCKS;
}
/**
* Resets the inflater so that a new stream can be decompressed. All pending input and output will
* be discarded.
*/
public void reset() {
mode = nowrap ? DECODE_BLOCKS : DECODE_HEADER;
totalIn = totalOut = 0;
input.reset();
outputWindow.reset();
dynHeader = null;
litlenTree = null;
distTree = null;
isLastBlock = false;
adler.reset();
}
