# string-util.rb - string utilities
#
# Copyright (C) 2003 Tanaka Akira  <akr@fsij.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

require 'zlib'
require 'stringio'

class String
  def decode_gzip
    Zlib::GzipReader.new(StringIO.new(self)).read || ""
  end

  def encode_gzip
    out = ""
    Zlib::GzipWriter.wrap(StringIO.new(out)) {|gz|
      gz << self
    }
    out
  end

  def decode_deflate
    Zlib::Inflate.inflate(self)
  end
end