works

README.rdoc

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+= hunspell-ffi
+
+A Ruby FFI interface to the Hunspell spelling checker
+
+It should work wherever Ruby FFI works (tested on Ruby 1.9.2, 1.8.7, JRuby 1.5.1). 
+
+== Installation
+  1. Install hunspell (OSX: 'brew install hunspell' Debian: 'apt-get install hunspell')
+  2. gem install hunspell-ffi
+
+== Usage
+  require 'hunspell-ffi'
+  dict = Hunspell.new("path/to/cakes.aff", "path/to/cakes.dic")
+  dict.spell("Baumkuchen")    # => true  same as #check
+  dict.spell("Bomcuken")      # => false
+  dict.suggest("Baumgurken")  # => ["Baumkuchen"]
+  dict.suggest("qwss43easd")  # => []
+
+== Author
+Andreas Haller
+andreashaller@gmail.com
+
+== License
+Hereby placed under public domain, do what you want, just do not hold me accountable...
+
+== TODO 
+Add other hunspell methods (add, remove, analyze, stem ...)
+
+Test on Windows

Rakefile

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+require 'rake/testtask'
+task :default => [:test]
+Rake::TestTask.new(:test) do |t|
+  t.test_files = FileList['test/test_*.rb']
+  t.ruby_opts = ['-rubygems -I.'] if defined? Gem
+end

hunspell-ffi.gemspec

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+# encoding: utf-8
+Gem::Specification.new do |s|
+  s.name        = 'hunspell-ffi'
+  s.version     = '0.1'
+  s.date        = '2010-08-6'
+  s.authors     = ["Andreas Haller"]
+  s.email       = ["andreashaller@gmail.com"]
+  s.homepage    = "http://github.com/ahaller/hunspell-ffi"
+  s.summary     = "A Ruby FFI interface to the Hunspell spelling checker"
+  s.required_rubygems_version = ">= 1.3.6"
+  s.files       = Dir['test/cakes*'] + Dir['test/*.rb'] + Dir['lib/**/*.rb'] + %w(Rakefile README.rdoc)
+  s.test_files  = Dir['test/test_*.rb']
+  s.require_path = 'lib'
+end

lib/hunspell-ffi.rb

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+# encoding: utf-8
+require 'ffi'
+class Hunspell  
+  module C
+    extend FFI::Library
+    ffi_lib ['hunspell', 'libhunspell', 'hunspell-1.2', 'libhunspell-1.2']
+    attach_function :Hunspell_create, [:string, :string], :pointer
+    attach_function :Hunspell_spell, [:pointer, :string], :bool
+    attach_function :Hunspell_suggest, [:pointer, :pointer, :string], :int
+  end
+
+  # TODO RDoc
+
+  def initialize(affpath, dicpath)
+    @handler = C.Hunspell_create(affpath, dicpath)
+  end
+
+  def spell(word)
+    C.Hunspell_spell(@handler, word)
+  end
+  alias_method :check, :spell
+
+  def suggest(word)
+    ptr = FFI::MemoryPointer.new(:pointer, 1)    
+    len = Hunspell::C.Hunspell_suggest(@handler, ptr, word)
+    str_ptr = ptr.read_pointer
+    str_ptr.null? ? [] : str_ptr.get_array_of_string(0, len).compact
+  end  
+end

test/cakes.dic

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+20
+Apfelkuchen
+Baumkuchen
+Bienenstich
+Butterkuchen
+Donauwelle
+Eierschecke
+Guglhupf
+Hefekuchen
+Käsekuchen
+Marmorkuchen
+Obstkuchen
+Panettone
+Pflaumenkuchen
+Russischer Zupfkuchen
+Rührkuchen
+Sandkuchen
+Schmandkuchen
+Stollen
+Streuselkuchen
+Zwiebelkuchen

test/test_hunspell.rb

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+# encoding: utf-8
+require "test/unit"
+require File.expand_path(File.dirname(__FILE__)) + '/../lib/hunspell-ffi'
+class TestHunspell < Test::Unit::TestCase  
+  def setup
+    @dict_dir = File.dirname(__FILE__)
+    @dict = Hunspell.new("#{@dict_dir}/cakes.aff", "#{@dict_dir}/cakes.dic")
+  end
+
+  def test_basic_spelling
+    assert @dict.spell("Baumkuchen") == true
+    assert @dict.check("Baumkuchen") == true # check alias
+    assert @dict.spell("Bomcuken") == false
+    assert_equal ["Baumkuchen"], @dict.suggest("Baumgurken")
+    assert_equal [], @dict.suggest("qwss43easd")
+  end
+end