com.facebook.buck.cxx.toolchain.objectfile

Class ULEB128

java.lang.Object

com.facebook.buck.cxx.toolchain.objectfile.ULEB128

public class ULEB128
extends Object

Utility for ULEB128 encoding as used by ld64.

Constructor Summary

Constructors

Constructor and Description
ULEB128()

Method Summary

Modifier and Type	Method and Description
static long	read(ByteBuffer byteBuffer) Reads a number encoded as ULEB128.
static int	size(long value) Computes the size when encoding values using ULEB128.
static int	write(ByteBuffer byteBuffer, long value) Encodes a value using ULEB128 encoding.

Methods inherited from class java.lang.Object

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

Constructor Detail

ULEB128

public ULEB128()

Method Detail

size

public static int size(long value)

Computes the size when encoding values using ULEB128.

Parameters:

value - The value for which to return the size of in ULEB128.

Returns:

The number of bytes needed to encode .

write

public static int write(ByteBuffer byteBuffer,
                        long value)

Encodes a value using ULEB128 encoding.

Parameters:

byteBuffer - The output destination used for encoding.

value - The value to encode.

Returns:

Number of bytes written.

read

public static long read(ByteBuffer byteBuffer)

Reads a number encoded as ULEB128. If the encoded number exceeds 64bits, then a java.lang.IllegalStateException exception is thrown because long stores a maximum of 64bits.

Parameters:

byteBuffer - The source which to read from.

Returns:

The value of the ULEB128 encoded number.