Package gc.garcol.libcore

Class BufferUtil

java.lang.Object
gc.garcol.libcore.BufferUtil
public class BufferUtil extends Object
Utility class for working with ByteBuffers using VarHandles. Provides methods to access the underlying byte array and its offset.
Since:
2024

  • Field Details

    • ARRAY_BASE_OFFSET

      public static final long ARRAY_BASE_OFFSET
      The base offset of the byte array in memory. Used for calculating the memory address of array elements.

    • BYTE_BUFFER_HB_HANDLE

      public static final VarHandle BYTE_BUFFER_HB_HANDLE
      VarHandle for accessing the "hb" field in ByteBuffer. This field represents the underlying byte array of the ByteBuffer.

    • BYTE_BUFFER_OFFSET_HANDLE

      public static final VarHandle BYTE_BUFFER_OFFSET_HANDLE
      VarHandle for accessing the "offset" field in ByteBuffer. This field represents the offset of the underlying byte array in the ByteBuffer.

  • Method Details

    • array

      public static byte[] array(ByteBuffer buffer)
      Returns the underlying byte array of the given ByteBuffer.
      Parameters:
      buffer - the ByteBuffer to extract the byte array from
      Returns:
      the underlying byte array
      Throws:
      IllegalArgumentException - if the buffer is direct

    • arrayOffset

      public static int arrayOffset(ByteBuffer buffer)
      Returns the offset of the underlying byte array in the given ByteBuffer.
      Parameters:
      buffer - the ByteBuffer to extract the offset from
      Returns:
      the offset of the underlying byte array