Ruby 1.9.2 リファレンスマニュアル > ライブラリ一覧 > Win32APIライブラリ > Win32APIクラス

class Win32API

クラスの継承リスト: Win32API < Object < Kernel < BasicObject

要約

Win32 API を呼び出すためのクラスです。

使用例 1: MessageBox

require 'Win32API'
# require 'dl/win32'

class Win32API
  # type flag
  MB_OK               = 0
  MB_OKCANCEL         = 1
  MB_ABORTRETRYIGNORE = 2
  MB_YESNOCANCEL      = 3
  MB_YESNO            = 4
  MB_RETRYCANCEL      = 5

  # return values
  IDOK     = 1
  IDCANCEL = 2
  IDABORT  = 3
  IDRETRY  = 4
  IDIGNORE = 5
  IDYES    = 6
  IDNO     = 7

  def Win32API.MessageBox(wnd, text, caption, type = MB_OK)
    messagebox = Win32API.new('user32', 'MessageBox', %w(p p p i), 'i')

    messagebox.call(wnd, text, caption, type)
  end

  def Win32API.MessageBoxEx(wnd, text, caption, type = MB_OK, languageid = 0)
    messagebox = Win32API.new('user32', 'MessageBoxEx', %w(p p p i i), 'i')

    messagebox.call(wnd, text, caption, type, languageid)
  end
end

p Win32API.MessageBox(0, "test message", "test caption")
p Win32API.MessageBoxEx(0, "test message", "test caption")
p Win32API.MessageBox(0, "てすと", "テスト")
p Win32API.MessageBoxEx(0, "てすと", "テスト")

使用例 2: Cygwin の uname コマンドの代わり

require 'Win32API'

module Cygwin
  def uname
    uname = Win32API.new 'cygwin1', 'uname', ['P'], 'I'
    utsname = ' ' * 100
    raise 'cannot get system name' if uname.call(utsname) == -1

    utsname.unpack('A20' * 5)
  end
  module_function :uname
end

p Cygwin.uname

=> ["CYGWIN_98-4.10", "hoge", "1.1.7(0.31/3/2)", "2000-12-25 12:39", "i586"]

使用例 3: Cygwin の cygpath コマンドの代わり

require 'Win32API'

module Cygwin
  @conv_to_full_posix_path =
    Win32API.new('cygwin1.dll', 'cygwin_conv_to_full_posix_path', 'PP', 'I')
  @conv_to_posix_path =
    Win32API.new('cygwin1.dll', 'cygwin_conv_to_posix_path', 'PP', 'I')
  @conv_to_full_win32_path =
    Win32API.new('cygwin1.dll', 'cygwin_conv_to_full_win32_path', 'PP', 'I')
  @conv_to_win32_path =
    Win32API.new('cygwin1.dll', 'cygwin_conv_to_win32_path', 'PP', 'I')

  def cygpath(options, path)
    absolute = shortname = false
    func = nil
    options.delete(" \t-").each_byte {|opt|
      case opt
      when ?u
        func = [@conv_to_full_posix_path, @conv_to_posix_path]
      when ?w
        func = [@conv_to_full_win32_path, @conv_to_win32_path]
      when ?a
        absolute = true
      when ?s
        shortname = true
      end
    }
    raise ArgumentError "first argument must contain -u or -w" if func.nil?
    func = absolute ? func[0] : func[1]
    buf = "\0" * 300
    if func.Call(path, buf) == -1
      raise "cannot convert path name"
    end
    buf.delete!("\0")
    buf
  end
  module_function :cygpath
end

p Cygwin.cygpath("-u", 'c:\\')         # => "/cygdrive/c"
p Cygwin.cygpath("-w", '/cygdrive/c')  # => "c:\\"
p Cygwin.cygpath("-wa", '.')           # => "d:\\home\\arai"

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