org.yamcs.utils

Class VarIntUtil

java.lang.Object

org.yamcs.utils.VarIntUtil

public class VarIntUtil
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	VarIntUtil.ArrayDecoder decodes an array of varints
static class	VarIntUtil.SignedArrayDecoder

Constructor Summary

Constructors

Constructor and Description
VarIntUtil()

Method Summary

Modifier and Type	Method and Description
static int[]	decodeDeltaDeltaZigZag(int[] ddz)
static int	decodeZigZag(int x)
static int[]	encodeDeltaDeltaZigZag(int[] x)
static int[]	encodeDeltaDeltaZigZag(IntArray a)
static int[]	encodeDeltaDeltaZigZag(SortedIntArray a)
static int	encodeSigned(byte[] buf, int pos, int x)
static int	encodeZigZag(int x)
static int	getEncodedSize(int size) get the number of bytes necessary to encode value
static VarIntUtil.ArrayDecoder	newArrayDecoder(byte[] buf)
static int	readSignedVarInt32(ByteBuffer bb)
static String	readSizeDelimitedString(ByteBuffer bb)
static int	readVarInt32(ByteBuffer bb)
static long	readVarInt64(ByteBuffer bb)
static void	writeSignedVarint32(ByteBuffer bb, int x)
static void	writeSizeDelimitedString(ByteBuffer bb, String s)
static int	writeVarint32(byte[] buf, int pos, int x) Encodes x as varint in the buffer at position pos and returns the new position
static void	writeVarInt32(ByteBuffer bb, int x)
static void	writeVarInt64(ByteBuffer bb, long x)

Methods inherited from class java.lang.Object

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

Constructor Detail

VarIntUtil

public VarIntUtil()

Method Detail

writeVarint32

public static int writeVarint32(byte[] buf,
                                int pos,
                                int x)

Encodes x as varint in the buffer at position pos and returns the new position

Parameters:

buf -

x -

Returns:

the decoded integer

writeVarInt32

public static void writeVarInt32(ByteBuffer bb,
                                 int x)

writeVarInt64

public static void writeVarInt64(ByteBuffer bb,
                                 long x)

readVarInt32

public static int readVarInt32(ByteBuffer bb)
                        throws DecodingException

Throws:

DecodingException

readVarInt64

public static long readVarInt64(ByteBuffer bb)

writeSignedVarint32

public static void writeSignedVarint32(ByteBuffer bb,
                                       int x)

readSignedVarInt32

public static int readSignedVarInt32(ByteBuffer bb)
                              throws DecodingException

Throws:

DecodingException

encodeSigned

public static int encodeSigned(byte[] buf,
                               int pos,
                               int x)

newArrayDecoder

public static VarIntUtil.ArrayDecoder newArrayDecoder(byte[] buf)

decodeZigZag

public static int decodeZigZag(int x)

encodeZigZag

public static int encodeZigZag(int x)

writeSizeDelimitedString

public static void writeSizeDelimitedString(ByteBuffer bb,
                                            String s)

readSizeDelimitedString

public static String readSizeDelimitedString(ByteBuffer bb)
                                      throws DecodingException

Throws:

DecodingException

encodeDeltaDeltaZigZag

public static int[] encodeDeltaDeltaZigZag(int[] x)

decodeDeltaDeltaZigZag

public static int[] decodeDeltaDeltaZigZag(int[] ddz)

encodeDeltaDeltaZigZag

public static int[] encodeDeltaDeltaZigZag(SortedIntArray a)

encodeDeltaDeltaZigZag

public static int[] encodeDeltaDeltaZigZag(IntArray a)

getEncodedSize

public static int getEncodedSize(int size)

get the number of bytes necessary to encode value

Parameters:

size -

Returns: