Package com.couchbase.client.core.util

Class UnsignedLEB128

  • public class UnsignedLEB128
extends Object
    Encodes and decodes the unsigned LEB128 (Little Endian Base 128) format. See https://en.wikipedia.org/wiki/LEB128

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static long decode​(byte[] bytes)
      Given a byte array starting with an unsigned LEB128 value, returns the decoded form of that value.
      static byte[] encode​(long value)
      Returns a byte array containing the unsigned LEB128 representation of the given value.
      static long read​(com.couchbase.client.core.deps.io.netty.buffer.ByteBuf buf)
      Reads an unsigned LEB128 value from the buffer.
      static void skip​(com.couchbase.client.core.deps.io.netty.buffer.ByteBuf buf)
      Advances the buffer's reader index past the unsigned LEB128 value at the reader index.
      static void write​(com.couchbase.client.core.deps.io.netty.buffer.ByteBuf buf, long value)
      Writes the unsigned LEB128 representation of the value to the buffer.

    • Method Detail

      • read

        public static long read​(com.couchbase.client.core.deps.io.netty.buffer.ByteBuf buf)
        Reads an unsigned LEB128 value from the buffer. If this methods throws an exception the reader index remains unchanged, otherwise the index advances past the value.
        Returns:
        the decoded value
        Throws:
        ArithmeticException - if the decoded value is longer than 64 bits.
        IndexOutOfBoundsException - if the buffer's readable bytes do not contain a complete value.

      • skip

        public static void skip​(com.couchbase.client.core.deps.io.netty.buffer.ByteBuf buf)
        Advances the buffer's reader index past the unsigned LEB128 value at the reader index. If this methods throws an exception the reader index will be unchanged.
        Throws:
        IndexOutOfBoundsException - if the buffer's readable bytes do not contain a complete value.

      • write

        public static void write​(com.couchbase.client.core.deps.io.netty.buffer.ByteBuf buf,
                         long value)
        Writes the unsigned LEB128 representation of the value to the buffer.

      • encode

        public static byte[] encode​(long value)
        Returns a byte array containing the unsigned LEB128 representation of the given value.

      • decode

        public static long decode​(byte[] bytes)
        Given a byte array starting with an unsigned LEB128 value, returns the decoded form of that value.
        Throws:
        ArithmeticException - if the decoded value is larger than 64 bits.
        IndexOutOfBoundsException - if the input does not contain a complete LEB128 value