Super IO

make object serializable via to_io from_io.

Installation

Add this to your application's shard.yml:

dependencies:
  super_io:
    github: chenkovsky/super_io

Usage

require "super_io"
  it "string hash" do
    hs = {"a" => "b", "c" => "d"}
    File.open("tmp.bin", "wb") do |io|
      SuperIO.to_io hs, io, IO::ByteFormat::LittleEndian
    end
    hs2 = File.open("tmp.bin", "rb") do |io|
      SuperIO.from_io Hash(String, String), io, IO::ByteFormat::LittleEndian
    end
    hs2.should eq(hs)
  end

  it "char array" do
    arr = ['a', 'b', 'c']
    File.open("tmp.bin", "wb") do |io|
      SuperIO.to_io arr, io, IO::ByteFormat::LittleEndian
    end
    arr2 = File.open("tmp.bin", "rb") do |io|
      SuperIO.from_io Array(Char), io, IO::ByteFormat::LittleEndian
    end
    arr2.should eq(arr)
  end

  it "string array" do
    arr = ["a", "b", "c"]
    File.open("tmp.bin", "wb") do |io|
      SuperIO.to_io arr, io, IO::ByteFormat::LittleEndian
    end
    arr2 = File.open("tmp.bin", "rb") do |io|
      SuperIO.from_io Array(String), io, IO::ByteFormat::LittleEndian
    end
    arr2.should eq(arr)
  end

  it "two string array" do
    arr = ["a", "b", "c"]
    arr_ = ["e", "f", "g"]
    File.open("tmp.bin", "wb") do |io|
      SuperIO.to_io arr, io, IO::ByteFormat::LittleEndian
      SuperIO.to_io arr_, io, IO::ByteFormat::LittleEndian
    end
    arr2, arr_2 = File.open("tmp.bin", "rb") do |io|
      a1 = SuperIO.from_io Array(String), io, IO::ByteFormat::LittleEndian
      a2 = SuperIO.from_io Array(String), io, IO::ByteFormat::LittleEndian
      {a1, a2}
    end
    arr2.should eq(arr)
    arr_2.should eq(arr_)
  end

  class Base
    SuperIO.reflect_io
  end

  class Sub1 < Base
    def to_io(io, format)
    end

    def self.from_io(io, format)
      Sub1.new
    end
  end

  class Sub2 < Base
    def to_io(io, format)
    end

    def self.from_io(io, format)
      Sub2.new
    end
  end

  it "reflect io" do
    s1 = Sub1.new
    s2 = Sub2.new
    File.open("tmp.bin", "wb") do |fo|
      s1.rto_io(fo, IO::ByteFormat::LittleEndian)
      s2.rto_io(fo, IO::ByteFormat::LittleEndian)
    end

    File.open("tmp.bin", "rb") do |fi|
      Base.rfrom_io(fi, IO::ByteFormat::LittleEndian).is_a?(Sub1)
      Base.rfrom_io(fi, IO::ByteFormat::LittleEndian).is_a?(Sub2)
    end
  end