gistfile1.rb

require 'oj'
require 'stringio'
require 'json'

class Handler
  def hash_start
    {}
  end

  def hash_set(h,k,v)
    h.store(k,v)
  end

  def array_start
    []
  end

  def array_append(a,v)
    a << v
  end

  def add_value(v)
    p v
  end

  def error(message, line, column)
    raise Exception.new(message, line, column)
  end
end
handler = Handler.new

read_io, write_io = IO.pipe

if fork
  write_io.close
  Oj.sc_parse(handler, read_io)
  read_io.close
  Process.wait
else
  json = {"glossary"=>{"GlossDiv"=>{"GlossList"=>{"GlossEntry"=>{"Abbrev"=>"ISO 8879:1986", "Acronym"=>"SGML", "GlossDef"=>{"GlossSeeAlso"=>["GML", "XML"], "para"=>"A meta-markup language, used to create markup languages such as DocBook."}, "GlossSee"=>"markup", "GlossTerm"=>"Standard Generalized Markup Language", "ID"=>"SGML", "SortAs"=>"SGML"}}, "title"=>"S"}, "title"=>"example glossary"}}
{"glossary"=>{"GlossDiv"=>{"GlossList"=>{"GlossEntry"=>{"Abbrev"=>"ISO 8879:1986", "Acronym"=>"SGML", "GlossDef"=>{"GlossSeeAlso"=>["GML", "XML"], "para"=>"A meta-markup language, used to create markup languages such as DocBook."}, "GlossSee"=>"markup", "GlossTerm"=>"Standard Generalized Markup Language", "ID"=>"SGML", "SortAs"=>"SGML"}}, "title"=>"S"}, "title"=>"example glossary"}}
{"glossary"=>{"GlossDiv"=>{"GlossList"=>{"GlossEntry"=>{"Abbrev"=>"ISO 8879:1986", "Acronym"=>"SGML", "GlossDef"=>{"GlossSeeAlso"=>["GML", "XML"], "para"=>"A meta-markup language, used to create markup languages such as DocBook."}, "GlossSee"=>"markup", "GlossTerm"=>"Standard Generalized Markup Language", "ID"=>"SGML", "SortAs"=>"SGML"}}, "title"=>"S"}, "title"=>"example glossary"}}.to_json

  read_io.close
  write_io.write json
  write_io.close
end