# frozen_string_literal: true
require 'forwardable'

module Steam
  # Reads bytes from a given IO object.
  class ByteReader
    extend Forwardable

    # Create a ByteReader object
    #
    # @param io [:read] an io object
    def initialize(io)
      @io = io
    end

    # Reads a string of a given length from the stream
    #
    # @param len [Integer] the number of bytes to read
    # @return [String] The read string
    def string(len)
      read(len)
    end

    # Reads an unsigned 32 bit integer from the stream
    #
    # @return [Integer] The 32 bit integer
    def unsigned_int32
      @io.read(4).unpack('<I*').first
    end

    # Reads an signed 32 bit integer from the stream
    #
    # @return [Integer] The 32 bit integer
    def signed_int32
      @io.read(4).unpack('<i*').first
    end

    def_delegator :@io, :read, :read
    def_delegator :@io, :eof?, :eof?
  end
end