Package org.apache.cassandra.utils

Class FastByteOperations

java.lang.Object

org.apache.cassandra.utils.FastByteOperations

public class FastByteOperations
extends Object

Utility code to do optimized byte-array comparison. This is borrowed and slightly modified from Guava's UnsignedBytes class to be able to compare arrays that start at non-zero offsets.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	FastByteOperations.ByteOperations
static final class	FastByteOperations.PureJavaOperations
static final class	FastByteOperations.UnsafeOperations

Constructor Summary

Constructors

Constructor	Description
FastByteOperations()

Method Summary

Modifier and Type	Method	Description
static int	compareUnsigned(byte[] b1, byte[] b2)
static int	compareUnsigned(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2)	Lexicographically compare two byte arrays.
static int	compareUnsigned(byte[] b1, int s1, int l1, ByteBuffer b2)
static int	compareUnsigned(byte[] b1, int s1, int l1, ByteBuffer b2, int s2, int l2)
static int	compareUnsigned(ByteBuffer b1, byte[] b2, int s2, int l2)
static int	compareUnsigned(ByteBuffer b1, int s1, int l1, byte[] b2, int s2, int l2)
static int	compareUnsigned(ByteBuffer b1, ByteBuffer b2)
static void	copy(byte[] src, int srcPosition, byte[] trg, int trgPosition, int length)
static void	copy(byte[] src, int srcPosition, ByteBuffer trg, int trgPosition, int length)
static void	copy(ByteBuffer src, int srcPosition, byte[] trg, int trgPosition, int length)
static void	copy(ByteBuffer src, int srcPosition, ByteBuffer trg, int trgPosition, int length)

Methods inherited from class java.lang.Object

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

Constructor Details

FastByteOperations

public FastByteOperations()

Method Details

compareUnsigned

public static int compareUnsigned(byte[] b1,
 int s1,
 int l1,
 byte[] b2,
 int s2,
 int l2)

Lexicographically compare two byte arrays.

compareUnsigned

public static int compareUnsigned(ByteBuffer b1,
 byte[] b2,
 int s2,
 int l2)

compareUnsigned

public static int compareUnsigned(byte[] b1,
 int s1,
 int l1,
 ByteBuffer b2)

compareUnsigned

public static int compareUnsigned(ByteBuffer b1,
 int s1,
 int l1,
 byte[] b2,
 int s2,
 int l2)

compareUnsigned

public static int compareUnsigned(byte[] b1,
 int s1,
 int l1,
 ByteBuffer b2,
 int s2,
 int l2)

compareUnsigned

public static int compareUnsigned(ByteBuffer b1,
 ByteBuffer b2)

compareUnsigned

public static int compareUnsigned(byte[] b1,
 byte[] b2)

copy

public static void copy(byte[] src,
 int srcPosition,
 byte[] trg,
 int trgPosition,
 int length)

copy

public static void copy(ByteBuffer src,
 int srcPosition,
 byte[] trg,
 int trgPosition,
 int length)

copy

public static void copy(byte[] src,
 int srcPosition,
 ByteBuffer trg,
 int trgPosition,
 int length)

copy

public static void copy(ByteBuffer src,
 int srcPosition,
 ByteBuffer trg,
 int trgPosition,
 int length)