Class VarInt

java.lang.Object

com.hypixel.hytale.math.data.VarInt

public final class VarInt
extends Object

Since:

16.03.2016

Method Summary

Modifier and Type	Method	Description
static int	readSignedVarInt(byte[] bytes)
static int	readSignedVarInt(DataInput in)
static long	readSignedVarLong(DataInput in)
static int	readUnsignedVarInt(byte[] bytes)
static int	readUnsignedVarInt(DataInput in)
static long	readUnsignedVarLong(DataInput in)
static byte[]	writeSignedVarInt(int value)
static void	writeSignedVarInt(int value, DataOutput out)	Encodes a value using the variable-length encoding from Google Protocol Buffers.
static void	writeSignedVarLong(long value, DataOutput out)	Encodes a value using the variable-length encoding from Google Protocol Buffers.
static byte[]	writeUnsignedVarInt(int value)
static void	writeUnsignedVarInt(int value, DataOutput out)	Encodes a value using the variable-length encoding from Google Protocol Buffers.
static void	writeUnsignedVarLong(long value, DataOutput out)	Encodes a value using the variable-length encoding from Google Protocol Buffers.

Methods inherited from class Object

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

Method Details

writeSignedVarLong

public static void writeSignedVarLong(long value,
 @Nonnull
 DataOutput out)
                               throws IOException

Encodes a value using the variable-length encoding from Google Protocol Buffers. It uses zig-zag encoding to efficiently encode signed values. If values are known to be nonnegative, writeUnsignedVarLong(long, DataOutput) should be used.

Parameters:

value - value to encode

out - to write bytes to

Throws:

IOException - if DataOutput throws IOException

writeUnsignedVarLong

public static void writeUnsignedVarLong(long value,
 @Nonnull
 DataOutput out)
                                 throws IOException

Encodes a value using the variable-length encoding from Google Protocol Buffers. Zig-zag is not used, so input must not be negative. If values can be negative, use writeSignedVarLong(long, DataOutput) instead. This method treats negative input as like a large unsigned value.

Parameters:

value - value to encode

out - to write bytes to

Throws:

IOException - if DataOutput throws IOException

writeSignedVarInt

public static void writeSignedVarInt(int value,
 @Nonnull
 DataOutput out)
                              throws IOException

Encodes a value using the variable-length encoding from Google Protocol Buffers. It uses zig-zag encoding to efficiently encode signed values. If values are known to be nonnegative, writeUnsignedVarLong(long, DataOutput) should be used.

Parameters:

value - value to encode

out - to write bytes to

Throws:

IOException - if DataOutput throws IOException

writeUnsignedVarInt

public static void writeUnsignedVarInt(int value,
 @Nonnull
 DataOutput out)
                                throws IOException

Encodes a value using the variable-length encoding from Google Protocol Buffers. Zig-zag is not used, so input must not be negative. If values can be negative, use writeSignedVarLong(long, DataOutput) instead. This method treats negative input as like a large unsigned value.

Parameters:

value - value to encode

out - to write bytes to

Throws:

IOException - if DataOutput throws IOException

writeSignedVarInt

public static byte[] writeSignedVarInt(int value)

writeUnsignedVarInt

public static byte[] writeUnsignedVarInt(int value)

Parameters:

value - value to encode

Returns:

the byte array of the encoded value

See Also:

• This one does not use streams and is much faster. Makes a single object each time, and that object is a primitive array.

readSignedVarLong

public static long readSignedVarLong(@Nonnull
 DataInput in)
                              throws IOException

Parameters:

in - to read bytes from

Returns:

decode value

Throws:

IOException - if DataInput throws IOException

IllegalArgumentException - if variable-length value does not terminate after 9 bytes have been read

See Also:

• writeSignedVarLong(long, DataOutput)

readUnsignedVarLong

public static long readUnsignedVarLong(@Nonnull
 DataInput in)
                                throws IOException

Parameters:

in - to read bytes from

Returns:

decode value

Throws:

IOException - if DataInput throws IOException

IllegalArgumentException - if variable-length value does not terminate after 9 bytes have been read

See Also:

• writeUnsignedVarLong(long, DataOutput)

readSignedVarInt

public static int readSignedVarInt(@Nonnull
 DataInput in)
                            throws IOException

Parameters:

in - the input

Returns:

the varint read from data input

Throws:

IllegalArgumentException - if variable-length value does not terminate after 5 bytes have been read

IOException - if DataInput throws IOException

See Also:

• readSignedVarLong(DataInput)

readUnsignedVarInt

public static int readUnsignedVarInt(@Nonnull
 DataInput in)
                              throws IOException

Parameters:

in - the input

Returns:

the var int read from in

Throws:

IllegalArgumentException - if variable-length value does not terminate after 5 bytes have been read

IOException - if DataInput throws IOException

See Also:

• readUnsignedVarLong(DataInput)

readSignedVarInt

public static int readSignedVarInt(@Nonnull
 byte[] bytes)

readUnsignedVarInt

public static int readUnsignedVarInt(@Nonnull
 byte[] bytes)