module Rbcalc

# File lib/rbcalc.rb, line 24
def self.home
  Pathname.new(__FILE__).dirname
end

# File lib/rbcalc.rb, line 28
def self.init!
  vpath = self.home.join('..','vendor','bcalc')
  incpath = Pathname('/usr/local/include')
  libpath = Pathname('/usr/local/lib')
  # prepare library for linking
  case Rbcalc.os
  when :macosx
    unless File.exists?(libpath.join('libbcalcdds.dylib'))
      FileUtils.ln_s(vpath.join('libbcalcdds.dylib'),libpath.join('libbcalcdds.dylib')) 
    end
    unless File.exists?(incpath.join('bcalcdds.h'))
      FileUtils.ln_s(vpath.join('bcalcdds.h'),incpath.join('bcalcdds.h')) 
    end
  when :linux
    unless File.exists?(libpath.join('libbcalcdds.so'))
      FileUtils.ln_s(vpath.join('libbcalcdds.so'),libpath.join('libbcalcdds.so')) 
    end
    unless File.exists?(incpath.join('bcalcdds.h'))
      FileUtils.ln_s(vpath.join('bcalcdds.h'),incpath.join('bcalcdds.h')) 
    end
  else
    raise Error::WebDriverError, "Rbcalc cannot currently run on #{Rbcalc.os}"
  end
end

# File lib/rbcalc.rb, line 6
def self.os
  @os ||= (
    host_os = RbConfig::CONFIG['host_os']
    case host_os
    when /mswin|msys|mingw|cygwin|bccwin|wince|emc/
      :windows
    when /darwin|mac os/
      :macosx
    when /linux/
      :linux
    when /solaris|bsd/
      :unix
    else
      raise Error::WebDriverError, "unknown os: #{host_os.inspect}"
    end
  )
end