mcs/class/corlib/System/Console.cs

   1 //
   2 // System.Console.cs
   3 //
   4 // Author:
   5 //      Dietmar Maurer (dietmar@ximian.com)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //
   8 // (C) Ximian, Inc.  http://www.ximian.com
   9 // (C) 2004,2005 Novell, Inc. (http://www.novell.com)
  10 //
  11
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Diagnostics;
  33 using System.IO;
  34 using System.Runtime.CompilerServices;
  35 using System.Runtime.InteropServices;
  36 using System.Security;
  37 using System.Security.Permissions;
  38 using System.Text;
  39
  40 namespace System
  41 {
  42         public static class Console
  43         {
  44 #if !NET_2_1
  45                 private class WindowsConsole
  46                 {
  47                         public static bool ctrlHandlerAdded = false;
  48                         private delegate bool WindowsCancelHandler (int keyCode);
  49                         private static WindowsCancelHandler cancelHandler = new WindowsCancelHandler (DoWindowsConsoleCancelEvent);
  50
  51                         [DllImport ("kernel32.dll", CharSet=CharSet.Auto, ExactSpelling=true)]
  52                         private static extern int GetConsoleCP ();
  53                         [DllImport ("kernel32.dll", CharSet=CharSet.Auto, ExactSpelling=true)]
  54                         private static extern int GetConsoleOutputCP ();
  55
  56                         [DllImport ("kernel32.dll", CharSet=CharSet.Auto, ExactSpelling=true)]
  57                         private static extern bool SetConsoleCtrlHandler (WindowsCancelHandler handler, bool addHandler);
  58
  59                         // Only call the event handler if Control-C was pressed (code == 0), nothing else
  60                         private static bool DoWindowsConsoleCancelEvent (int keyCode)
  61                         {
  62                                 if (keyCode == 0)
  63                                         DoConsoleCancelEvent ();
  64                                 return keyCode == 0;
  65                         }
  66
  67                         [MethodImpl (MethodImplOptions.NoInlining)]
  68                         public static int GetInputCodePage ()
  69                         {
  70                                 return GetConsoleCP ();
  71                         }
  72
  73                         [MethodImpl (MethodImplOptions.NoInlining)]
  74                         public static int GetOutputCodePage ()
  75                         {
  76                                 return GetConsoleOutputCP ();
  77                         }
  78
  79                         public static void AddCtrlHandler ()
  80                         {
  81                                 SetConsoleCtrlHandler (cancelHandler, true);
  82                                 ctrlHandlerAdded = true;
  83                         }
  84
  85                         public static void RemoveCtrlHandler ()
  86                         {
  87                                 SetConsoleCtrlHandler (cancelHandler, false);
  88                                 ctrlHandlerAdded = false;
  89                         }
  90                 }
  91 #endif
  92
  93                 internal static TextWriter stdout;
  94                 private static TextWriter stderr;
  95                 private static TextReader stdin;
  96
  97 #if NET_4_5 && !MOBILE
  98                 static TextWriter console_stdout;
  99                 static TextWriter console_stderr;
 100                 static TextReader console_stdin;
 101 #endif
 102
 103                 static Console ()
 104                 {
 105 #if NET_2_1
 106                         Encoding inputEncoding;
 107                         Encoding outputEncoding;
 108 #endif
 109
 110                         if (Environment.IsRunningOnWindows) {
 111                                 //
 112                                 // On Windows, follow the Windows tradition
 113                                 //
 114 #if NET_2_1
 115                                 // should never happen since Moonlight does not run on windows
 116                                 inputEncoding = outputEncoding = Encoding.Default;
 117 #else
 118                                 try {
 119                                         inputEncoding = Encoding.GetEncoding (WindowsConsole.GetInputCodePage ());
 120                                         outputEncoding = Encoding.GetEncoding (WindowsConsole.GetOutputCodePage ());
 121                                         // ArgumentException and NotSupportedException can be thrown as well
 122                                 } catch {
 123                                         // FIXME: I18N assemblies are not available when compiling mcs
 124                                         // Use Latin 1 as it is fast and UTF-8 is never used as console code page
 125                                         inputEncoding = outputEncoding = Encoding.Default;
 126                                 }
 127 #endif
 128                         } else {
 129                                 //
 130                                 // On Unix systems (128), do not output the
 131                                 // UTF-8 ZWNBSP (zero-width non-breaking space).
 132                                 //
 133                                 int code_page = 0;
 134                                 Encoding.InternalCodePage (ref code_page);
 135
 136                                 if (code_page != -1 && ((code_page & 0x0fffffff) == 3 // UTF8Encoding.UTF8_CODE_PAGE
 137                                         || ((code_page & 0x10000000) != 0)))
 138                                         inputEncoding = outputEncoding = Encoding.UTF8Unmarked;
 139                                 else
 140                                         inputEncoding = outputEncoding = Encoding.Default;
 141                         }
 142
 143                         SetupStreams (inputEncoding, outputEncoding);
 144                 }
 145
 146                 static void SetupStreams (Encoding inputEncoding, Encoding outputEncoding)
 147                 {
 148 #if !NET_2_1
 149                         if (!Environment.IsRunningOnWindows && ConsoleDriver.IsConsole) {
 150                                 StreamWriter w = new CStreamWriter (OpenStandardOutput (0), outputEncoding);
 151                                 w.AutoFlush = true;
 152                                 stdout = TextWriter.Synchronized (w, true);
 153
 154                                 w = new CStreamWriter (OpenStandardOutput (0), outputEncoding);
 155                                 w.AutoFlush = true;
 156                                 stderr = TextWriter.Synchronized (w, true);
 157
 158                                 stdin = new CStreamReader (OpenStandardInput (0), inputEncoding);
 159                         } else {
 160 #endif
 161 #if FULL_AOT_RUNTIME
 162                                 Type nslogwriter = Type.GetType ("MonoTouch.Foundation.NSLogWriter, monotouch, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null");
 163                                 stdout = (TextWriter) Activator.CreateInstance (nslogwriter);
 164 #else
 165                                 stdout = new UnexceptionalStreamWriter (OpenStandardOutput (0), outputEncoding);
 166                                 ((StreamWriter)stdout).AutoFlush = true;
 167 #endif
 168                                 stdout = TextWriter.Synchronized (stdout, true);
 169
 170 #if FULL_AOT_RUNTIME
 171                                 stderr = (TextWriter) Activator.CreateInstance (nslogwriter);
 172 #else
 173                                 stderr = new UnexceptionalStreamWriter (OpenStandardError (0), outputEncoding);
 174                                 ((StreamWriter)stderr).AutoFlush = true;
 175 #endif
 176                                 stderr = TextWriter.Synchronized (stderr, true);
 177
 178                                 stdin = new UnexceptionalStreamReader (OpenStandardInput (0), inputEncoding);
 179                                 stdin = TextReader.Synchronized (stdin);
 180 #if !NET_2_1
 181                         }
 182 #endif
 183
 184 #if NET_4_5 && !MOBILE
 185                         console_stderr = stderr;
 186                         console_stdout = stdout;
 187                         console_stdin = stdin;
 188 #endif
 189
 190 #if MONODROID
 191                         if (LogcatTextWriter.IsRunningOnAndroid ()) {
 192                                 stdout = TextWriter.Synchronized (new LogcatTextWriter ("mono-stdout", stdout));
 193                                 stderr = TextWriter.Synchronized (new LogcatTextWriter ("mono-stderr", stderr));
 194                         }
 195 #endif  // MONODROID
 196
 197                         GC.SuppressFinalize (stdout);
 198                         GC.SuppressFinalize (stderr);
 199                         GC.SuppressFinalize (stdin);
 200                 }
 201
 202                 public static TextWriter Error {
 203                         get {
 204                                 return stderr;
 205                         }
 206                 }
 207
 208                 public static TextWriter Out {
 209                         get {
 210                                 return stdout;
 211                         }
 212                 }
 213
 214                 public static TextReader In {
 215                         get {
 216                                 return stdin;
 217                         }
 218                 }
 219
 220                 private static Stream Open (IntPtr handle, FileAccess access, int bufferSize)
 221                 {
 222                         try {
 223                                 return new FileStream (handle, access, false, bufferSize, false, bufferSize == 0);
 224                         } catch (IOException) {
 225                                 return new NullStream ();
 226                         }
 227                 }
 228
 229                 public static Stream OpenStandardError ()
 230                 {
 231                         return OpenStandardError (0);
 232                 }
 233
 234                 // calling any FileStream constructor with a handle normally
 235                 // requires permissions UnmanagedCode permissions. In this
 236                 // case we assert this permission so the console can be used
 237                 // in partial trust (i.e. without having UnmanagedCode).
 238                 [SecurityPermission (SecurityAction.Assert, UnmanagedCode = true)]
 239                 public static Stream OpenStandardError (int bufferSize)
 240                 {
 241                         return Open (MonoIO.ConsoleError, FileAccess.Write, bufferSize);
 242                 }
 243
 244                 public static Stream OpenStandardInput ()
 245                 {
 246                         return OpenStandardInput (0);
 247                 }
 248
 249                 // calling any FileStream constructor with a handle normally
 250                 // requires permissions UnmanagedCode permissions. In this
 251                 // case we assert this permission so the console can be used
 252                 // in partial trust (i.e. without having UnmanagedCode).
 253                 [SecurityPermission (SecurityAction.Assert, UnmanagedCode = true)]
 254                 public static Stream OpenStandardInput (int bufferSize)
 255                 {
 256                         return Open (MonoIO.ConsoleInput, FileAccess.Read, bufferSize);
 257                 }
 258
 259                 public static Stream OpenStandardOutput ()
 260                 {
 261                         return OpenStandardOutput (0);
 262                 }
 263
 264                 // calling any FileStream constructor with a handle normally
 265                 // requires permissions UnmanagedCode permissions. In this
 266                 // case we assert this permission so the console can be used
 267                 // in partial trust (i.e. without having UnmanagedCode).
 268                 [SecurityPermission (SecurityAction.Assert, UnmanagedCode = true)]
 269                 public static Stream OpenStandardOutput (int bufferSize)
 270                 {
 271                         return Open (MonoIO.ConsoleOutput, FileAccess.Write, bufferSize);
 272                 }
 273
 274                 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
 275                 public static void SetError (TextWriter newError)
 276                 {
 277                         if (newError == null)
 278                                 throw new ArgumentNullException ("newError");
 279
 280                         stderr = newError;
 281                 }
 282
 283                 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
 284                 public static void SetIn (TextReader newIn)
 285                 {
 286                         if (newIn == null)
 287                                 throw new ArgumentNullException ("newIn");
 288
 289                         stdin = newIn;
 290                 }
 291
 292                 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
 293                 public static void SetOut (TextWriter newOut)
 294                 {
 295                         if (newOut == null)
 296                                 throw new ArgumentNullException ("newOut");
 297
 298                         stdout = newOut;
 299                 }
 300
 301                 public static void Write (bool value)
 302                 {
 303                         stdout.Write (value);
 304                 }
 305
 306                 public static void Write (char value)
 307                 {
 308                         stdout.Write (value);
 309                 }
 310
 311                 public static void Write (char[] buffer)
 312                 {
 313                         stdout.Write (buffer);
 314                 }
 315
 316                 public static void Write (decimal value)
 317                 {
 318                         stdout.Write (value);
 319                 }
 320
 321                 public static void Write (double value)
 322                 {
 323                         stdout.Write (value);
 324                 }
 325
 326                 public static void Write (int value)
 327                 {
 328                         stdout.Write (value);
 329                 }
 330
 331                 public static void Write (long value)
 332                 {
 333                         stdout.Write (value);
 334                 }
 335
 336                 public static void Write (object value)
 337                 {
 338                         stdout.Write (value);
 339                 }
 340
 341                 public static void Write (float value)
 342                 {
 343                         stdout.Write (value);
 344                 }
 345
 346                 public static void Write (string value)
 347                 {
 348                         stdout.Write (value);
 349                 }
 350
 351                 [CLSCompliant (false)]
 352                 public static void Write (uint value)
 353                 {
 354                         stdout.Write (value);
 355                 }
 356
 357                 [CLSCompliant (false)]
 358                 public static void Write (ulong value)
 359                 {
 360                         stdout.Write (value);
 361                 }
 362
 363                 public static void Write (string format, object arg0)
 364                 {
 365                         stdout.Write (format, arg0);
 366                 }
 367
 368                 public static void Write (string format, params object[] arg)
 369                 {
 370                         if (arg == null)
 371                                 stdout.Write (format);
 372                         else
 373                                 stdout.Write (format, arg);
 374                 }
 375
 376                 public static void Write (char[] buffer, int index, int count)
 377                 {
 378                         stdout.Write (buffer, index, count);
 379                 }
 380
 381                 public static void Write (string format, object arg0, object arg1)
 382                 {
 383                         stdout.Write (format, arg0, arg1);
 384                 }
 385
 386                 public static void Write (string format, object arg0, object arg1, object arg2 )
 387                 {
 388                         stdout.Write (format, arg0, arg1, arg2);
 389                 }
 390
 391                 [CLSCompliant (false)]
 392                 public static void Write (string format, object arg0, object arg1, object arg2, object arg3, __arglist)
 393                 {
 394                         ArgIterator iter = new ArgIterator (__arglist);
 395                         int argCount = iter.GetRemainingCount();
 396
 397                         object[] args = new object [argCount + 4];
 398                         args [0] = arg0;
 399                         args [1] = arg1;
 400                         args [2] = arg2;
 401                         args [3] = arg3;
 402                         for (int i = 0; i < argCount; i++) {
 403                                 TypedReference typedRef = iter.GetNextArg ();
 404                                 args [i + 4] = TypedReference.ToObject (typedRef);
 405                         }
 406
 407                         stdout.Write (String.Format (format, args));
 408                 }
 409
 410                 public static void WriteLine ()
 411                 {
 412                         stdout.WriteLine ();
 413                 }
 414
 415                 public static void WriteLine (bool value)
 416                 {
 417                         stdout.WriteLine (value);
 418                 }
 419
 420                 public static void WriteLine (char value)
 421                 {
 422                         stdout.WriteLine (value);
 423                 }
 424
 425                 public static void WriteLine (char[] buffer)
 426                 {
 427                         stdout.WriteLine (buffer);
 428                 }
 429
 430                 public static void WriteLine (decimal value)
 431                 {
 432                         stdout.WriteLine (value);
 433                 }
 434
 435                 public static void WriteLine (double value)
 436                 {
 437                         stdout.WriteLine (value);
 438                 }
 439
 440                 public static void WriteLine (int value)
 441                 {
 442                         stdout.WriteLine (value);
 443                 }
 444
 445                 public static void WriteLine (long value)
 446                 {
 447                         stdout.WriteLine (value);
 448                 }
 449
 450                 public static void WriteLine (object value)
 451                 {
 452                         stdout.WriteLine (value);
 453                 }
 454
 455                 public static void WriteLine (float value)
 456                 {
 457                         stdout.WriteLine (value);
 458                 }
 459
 460                 public static void WriteLine (string value)
 461                 {
 462                         stdout.WriteLine (value);
 463                 }
 464
 465                 [CLSCompliant (false)]
 466                 public static void WriteLine (uint value)
 467                 {
 468                         stdout.WriteLine (value);
 469                 }
 470
 471                 [CLSCompliant (false)]
 472                 public static void WriteLine (ulong value)
 473                 {
 474                         stdout.WriteLine (value);
 475                 }
 476
 477                 public static void WriteLine (string format, object arg0)
 478                 {
 479                         stdout.WriteLine (format, arg0);
 480                 }
 481
 482                 public static void WriteLine (string format, params object[] arg)
 483                 {
 484                         if (arg == null)
 485                                 stdout.WriteLine (format);
 486                         else
 487                                 stdout.WriteLine (format, arg);
 488                 }
 489
 490                 public static void WriteLine (char[] buffer, int index, int count)
 491                 {
 492                         stdout.WriteLine (buffer, index, count);
 493                 }
 494
 495                 public static void WriteLine (string format, object arg0, object arg1)
 496                 {
 497                         stdout.WriteLine (format, arg0, arg1);
 498                 }
 499
 500                 public static void WriteLine (string format, object arg0, object arg1, object arg2)
 501                 {
 502                         stdout.WriteLine (format, arg0, arg1, arg2);
 503                 }
 504
 505                 [CLSCompliant (false)]
 506                 public static void WriteLine (string format, object arg0, object arg1, object arg2, object arg3, __arglist)
 507                 {
 508                         ArgIterator iter = new ArgIterator (__arglist);
 509                         int argCount = iter.GetRemainingCount();
 510
 511                         object[] args = new object [argCount + 4];
 512                         args [0] = arg0;
 513                         args [1] = arg1;
 514                         args [2] = arg2;
 515                         args [3] = arg3;
 516                         for (int i = 0; i < argCount; i++) {
 517                                 TypedReference typedRef = iter.GetNextArg ();
 518                                 args [i + 4] = TypedReference.ToObject (typedRef);
 519                         }
 520
 521                         stdout.WriteLine (String.Format (format, args));
 522                 }
 523
 524 #if !NET_2_1
 525                 public static int Read ()
 526                 {
 527                         if ((stdin is CStreamReader) && ConsoleDriver.IsConsole) {
 528                                 return ConsoleDriver.Read ();
 529                         } else {
 530                                 return stdin.Read ();
 531                         }
 532                 }
 533
 534                 public static string ReadLine ()
 535                 {
 536                         if ((stdin is CStreamReader) && ConsoleDriver.IsConsole) {
 537                                 return ConsoleDriver.ReadLine ();
 538                         } else {
 539                                 return stdin.ReadLine ();
 540                         }
 541                 }
 542 #else
 543                 public static int Read ()
 544                 {
 545                         return stdin.Read ();
 546                 }
 547
 548                 public static string ReadLine ()
 549                 {
 550                         return stdin.ReadLine ();
 551                 }
 552
 553 #endif
 554
 555 #if !NET_2_1
 556                 // FIXME: Console should use these encodings when changed
 557                 static Encoding inputEncoding;
 558                 static Encoding outputEncoding;
 559
 560                 public static Encoding InputEncoding {
 561                         get { return inputEncoding; }
 562                         set {
 563                                 inputEncoding = value;
 564                                 SetupStreams (inputEncoding, outputEncoding);
 565                         }
 566                 }
 567
 568                 public static Encoding OutputEncoding {
 569                         get { return outputEncoding; }
 570                         set {
 571                                 outputEncoding = value;
 572                                 SetupStreams (inputEncoding, outputEncoding);
 573                         }
 574                 }
 575
 576                 public static ConsoleColor BackgroundColor {
 577                         get { return ConsoleDriver.BackgroundColor; }
 578                         set { ConsoleDriver.BackgroundColor = value; }
 579                 }
 580
 581                 public static int BufferHeight {
 582                         get { return ConsoleDriver.BufferHeight; }
 583                         [MonoLimitation ("Implemented only on Windows")]
 584                         set { ConsoleDriver.BufferHeight = value; }
 585                 }
 586
 587                 public static int BufferWidth {
 588                         get { return ConsoleDriver.BufferWidth; }
 589                         [MonoLimitation ("Implemented only on Windows")]
 590                         set { ConsoleDriver.BufferWidth = value; }
 591                 }
 592
 593                 [MonoLimitation ("Implemented only on Windows")]
 594                 public static bool CapsLock {
 595                         get { return ConsoleDriver.CapsLock; }
 596                 }
 597
 598                 public static int CursorLeft {
 599                         get { return ConsoleDriver.CursorLeft; }
 600                         set { ConsoleDriver.CursorLeft = value; }
 601                 }
 602
 603                 public static int CursorTop {
 604                         get { return ConsoleDriver.CursorTop; }
 605                         set { ConsoleDriver.CursorTop = value; }
 606                 }
 607
 608                 public static int CursorSize {
 609                         get { return ConsoleDriver.CursorSize; }
 610                         set { ConsoleDriver.CursorSize = value; }
 611                 }
 612
 613                 public static bool CursorVisible {
 614                         get { return ConsoleDriver.CursorVisible; }
 615                         set { ConsoleDriver.CursorVisible = value; }
 616                 }
 617
 618                 public static ConsoleColor ForegroundColor {
 619                         get { return ConsoleDriver.ForegroundColor; }
 620                         set { ConsoleDriver.ForegroundColor = value; }
 621                 }
 622
 623                 public static bool KeyAvailable {
 624                         get { return ConsoleDriver.KeyAvailable; }
 625                 }
 626
 627                 public static int LargestWindowHeight {
 628                         get { return ConsoleDriver.LargestWindowHeight; }
 629                 }
 630
 631                 public static int LargestWindowWidth {
 632                         get { return ConsoleDriver.LargestWindowWidth; }
 633                 }
 634
 635                 [MonoLimitation ("Only works on windows")]
 636                 public static bool NumberLock {
 637                         get { return ConsoleDriver.NumberLock; }
 638                 }
 639
 640                 public static string Title {
 641                         get { return ConsoleDriver.Title; }
 642                         set { ConsoleDriver.Title = value; }
 643                 }
 644
 645                 public static bool TreatControlCAsInput {
 646                         get { return ConsoleDriver.TreatControlCAsInput; }
 647                         set { ConsoleDriver.TreatControlCAsInput = value; }
 648                 }
 649
 650                 [MonoLimitation ("Only works on windows")]
 651                 public static int WindowHeight {
 652                         get { return ConsoleDriver.WindowHeight; }
 653                         set { ConsoleDriver.WindowHeight = value; }
 654                 }
 655
 656                 [MonoLimitation ("Only works on windows")]
 657                 public static int WindowLeft {
 658                         get { return ConsoleDriver.WindowLeft; }
 659                         set { ConsoleDriver.WindowLeft = value; }
 660                 }
 661
 662                 [MonoLimitation ("Only works on windows")]
 663                 public static int WindowTop {
 664                         get { return ConsoleDriver.WindowTop; }
 665                         set { ConsoleDriver.WindowTop = value; }
 666                 }
 667
 668                 [MonoLimitation ("Only works on windows")]
 669                 public static int WindowWidth {
 670                         get { return ConsoleDriver.WindowWidth; }
 671                         set { ConsoleDriver.WindowWidth = value; }
 672                 }
 673
 674 #if NET_4_5
 675                 public static bool IsErrorRedirected {
 676                         get {
 677                                 return stderr != console_stderr || ConsoleDriver.IsErrorRedirected;
 678                         }
 679                 }
 680
 681                 public static bool IsOutputRedirected {
 682                         get {
 683                                 return stdout != console_stdout || ConsoleDriver.IsOutputRedirected;
 684                         }
 685                 }
 686
 687                 public static bool IsInputRedirected {
 688                         get {
 689                                 return stdin != console_stdin || ConsoleDriver.IsInputRedirected;
 690                         }
 691                 }
 692 #endif
 693
 694                 public static void Beep ()
 695                 {
 696                         Beep (1000, 500);
 697                 }
 698
 699                 public static void Beep (int frequency, int duration)
 700                 {
 701                         if (frequency < 37 || frequency > 32767)
 702                                 throw new ArgumentOutOfRangeException ("frequency");
 703
 704                         if (duration <= 0)
 705                                 throw new ArgumentOutOfRangeException ("duration");
 706
 707                         ConsoleDriver.Beep (frequency, duration);
 708                 }
 709
 710                 public static void Clear ()
 711                 {
 712                         ConsoleDriver.Clear ();
 713                 }
 714
 715                 [MonoLimitation ("Implemented only on Windows")]
 716                 public static void MoveBufferArea (int sourceLeft, int sourceTop, int sourceWidth, int sourceHeight,
 717                                                 int targetLeft, int targetTop)
 718                 {
 719                         ConsoleDriver.MoveBufferArea (sourceLeft, sourceTop, sourceWidth, sourceHeight, targetLeft, targetTop);
 720                 }
 721
 722                 [MonoLimitation ("Implemented only on Windows")]
 723                 public static void MoveBufferArea (int sourceLeft, int sourceTop, int sourceWidth, int sourceHeight,
 724                                                 int targetLeft, int targetTop, Char sourceChar,
 725                                                 ConsoleColor sourceForeColor, ConsoleColor sourceBackColor)
 726                 {
 727                         ConsoleDriver.MoveBufferArea (sourceLeft, sourceTop, sourceWidth, sourceHeight, targetLeft, targetTop,
 728                                                         sourceChar, sourceForeColor, sourceBackColor);
 729                 }
 730
 731                 public static ConsoleKeyInfo ReadKey ()
 732                 {
 733                         return ReadKey (false);
 734                 }
 735
 736                 public static ConsoleKeyInfo ReadKey (bool intercept)
 737                 {
 738                         return ConsoleDriver.ReadKey (intercept);
 739                 }
 740
 741                 public static void ResetColor ()
 742                 {
 743                         ConsoleDriver.ResetColor ();
 744                 }
 745
 746                 [MonoLimitation ("Only works on windows")]
 747                 public static void SetBufferSize (int width, int height)
 748                 {
 749                         ConsoleDriver.SetBufferSize (width, height);
 750                 }
 751
 752                 public static void SetCursorPosition (int left, int top)
 753                 {
 754                         ConsoleDriver.SetCursorPosition (left, top);
 755                 }
 756
 757                 public static void SetWindowPosition (int left, int top)
 758                 {
 759                         ConsoleDriver.SetWindowPosition (left, top);
 760                 }
 761
 762                 public static void SetWindowSize (int width, int height)
 763                 {
 764                         ConsoleDriver.SetWindowSize (width, height);
 765                 }
 766
 767                 static ConsoleCancelEventHandler cancel_event;
 768                 public static event ConsoleCancelEventHandler CancelKeyPress {
 769                         add {
 770                                 if (ConsoleDriver.Initialized == false)
 771                                         ConsoleDriver.Init ();
 772
 773                                 cancel_event += value;
 774
 775                                 if (Environment.IsRunningOnWindows && !WindowsConsole.ctrlHandlerAdded)
 776                                         WindowsConsole.AddCtrlHandler();
 777                         }
 778                         remove {
 779                                 if (ConsoleDriver.Initialized == false)
 780                                         ConsoleDriver.Init ();
 781
 782                                 cancel_event -= value;
 783
 784                                 if (cancel_event == null && Environment.IsRunningOnWindows)
 785                                 {
 786                                         // Need to remove our hook if there's nothing left in the event
 787                                         if (WindowsConsole.ctrlHandlerAdded)
 788                                                 WindowsConsole.RemoveCtrlHandler();
 789                                 }
 790                         }
 791                 }
 792
 793                 delegate void InternalCancelHandler ();
 794
 795 #pragma warning disable 414
 796                 //
 797                 // Used by console-io.c
 798                 //
 799                 static readonly InternalCancelHandler cancel_handler = new InternalCancelHandler (DoConsoleCancelEvent);
 800 #pragma warning restore 414
 801
 802                 internal static void DoConsoleCancelEvent ()
 803                 {
 804                         bool exit = true;
 805                         if (cancel_event != null) {
 806                                 ConsoleCancelEventArgs args = new ConsoleCancelEventArgs (ConsoleSpecialKey.ControlC);
 807                                 Delegate [] delegates = cancel_event.GetInvocationList ();
 808                                 foreach (ConsoleCancelEventHandler d in delegates){
 809                                         try {
 810                                                 // Sender is always null here.
 811                                                 d (null, args);
 812                                         } catch {} // Ignore any exception.
 813                                 }
 814                                 exit = !args.Cancel;
 815                         }
 816
 817                         if (exit)
 818                                 Environment.Exit (58);
 819                 }
 820 #endif
 821         }
 822 }
 823