Package com.silabs.na.pcap.util

Class BufferUtil

  • public class BufferUtil
extends java.lang.Object
    Local utility class.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static int paddingLength​(int dataLength, int byteBoundary)
      Calculates the padding bytes to a given byte boundary.
      static byte[] readBytesFromChannel​(java.nio.channels.ReadableByteChannel rbc, java.nio.ByteBuffer buffer, int length)
      Read buffers from channel into a byte buffer.
      static int readNByteIntFromBuffer​(java.nio.ByteBuffer buffer, int n)
      Reads a N byte integer from buffer and return it.
      static int readNByteIntFromChannel​(java.nio.channels.ReadableByteChannel rbc, java.nio.ByteBuffer buffer, int n)
      Reads N bytes of integer from the channel, using an intermediate buffer and it's endianess.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • paddingLength

        public static int paddingLength​(int dataLength,
                                int byteBoundary)
        Calculates the padding bytes to a given byte boundary.
        Parameters:
        dataLength - Length of the data.
        byteBoundary - Byte boundary.
        Returns:
        the number of bytes that should be added to the padding.

      • readNByteIntFromChannel

        public static int readNByteIntFromChannel​(java.nio.channels.ReadableByteChannel rbc,
                                          java.nio.ByteBuffer buffer,
                                          int n)
                                   throws java.io.IOException
        Reads N bytes of integer from the channel, using an intermediate buffer and it's endianess. Buffer will be cleared and flipped along the way, so don't expect any data to be preserved in it.
        Parameters:
        rbc - Byte channel for reading.
        buffer - The temporary buffer used for the operation.
        n - Number of bytes that make up the int.
        Returns:
        Integer value of the read buffer.
        Throws:
        java.io.IOException - if something fails with underlying IO operations.

      • readBytesFromChannel

        public static byte[] readBytesFromChannel​(java.nio.channels.ReadableByteChannel rbc,
                                          java.nio.ByteBuffer buffer,
                                          int length)
                                   throws java.io.IOException
        Read buffers from channel into a byte buffer.
        Parameters:
        rbc - Byte channel for reading.
        buffer - The temporary buffer used for the operation.
        length - Number of bytes to read.
        Returns:
        Bytes that were read.
        Throws:
        java.io.IOException - if something fails with underlying IO operations.

      • readNByteIntFromBuffer

        public static int readNByteIntFromBuffer​(java.nio.ByteBuffer buffer,
                                         int n)
        Reads a N byte integer from buffer and return it.
        Parameters:
        buffer - Buffer from which to read bytes.
        n - Number of bytes that make up an integer.
        Returns:
        Integer value.