edu.cmu.sphinx.linguist.language.ngram.trie

Class NgramTrieBitarr

java.lang.Object

edu.cmu.sphinx.linguist.language.ngram.trie.NgramTrieBitarr

public class NgramTrieBitarr
extends java.lang.Object

Byte array that keeps ngram trie

Constructor Summary

Constructors

Constructor and Description
NgramTrieBitarr(int memLen)

Method Summary

Modifier and Type	Method and Description
byte[]	getArr() Getter for byte array, so it can be filled with actual data
float	readFloat(int memPtr, int bitOffset) Reads float from byte array for specified memory pointer and offset from this pointer.
int	readInt(int memPtr, int bitOffset, int mask) Reads integer from byte array for specified memory pointer, offset from this pointer and mask of value that is read.
float	readNegativeFloat(int memPtr, int bitOffset) Reads negative float from byte array for specified memory pointer and offset from this pointer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NgramTrieBitarr

public NgramTrieBitarr(int memLen)

Method Detail

getArr

public byte[] getArr()

Getter for byte array, so it can be filled with actual data

Returns:

data array

readInt

public int readInt(int memPtr,
                   int bitOffset,
                   int mask)

Reads integer from byte array for specified memory pointer, offset from this pointer and mask of value that is read.

Parameters:

memPtr - - memory pointer for specific ngram order

bitOffset - - offset from memPtr that is calculated according to ngram index and type of value that is read.

mask - - bit mask of value that is read

Returns:

requested integer

readNegativeFloat

public float readNegativeFloat(int memPtr,
                               int bitOffset)

Reads negative float from byte array for specified memory pointer and offset from this pointer. Used to read uncompressed float, i.e. in case quantation was not applied

Parameters:

memPtr - - memory pointer for specific ngram order

bitOffset - - offset from memPtr

Returns:

float that was read from specified position

readFloat

public float readFloat(int memPtr,
                       int bitOffset)

Reads float from byte array for specified memory pointer and offset from this pointer. Used to read uncompressed float, i.e. in case quantation was not applied

Parameters:

memPtr - - memory pointer for specific ngram order

bitOffset - - offset from memPtr

Returns:

float that was read from specified position