class/corlib/System/CStreamReader.cs

   1 //
   2 // System.CStreamReader
   3 //
   4 // Authors:
   5 //   Dietmar Maurer (dietmar@ximian.com)
   6 //   Miguel de Icaza (miguel@ximian.com)
   7 //   Dick Porter (dick@ximian.com)
   8 //   Sebastien Pouliot  <sebastien@ximian.com>
   9 //
  10 // (C) Ximian, Inc.  http://www.ximian.com
  11 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 #if !NET_2_1
  33 using System.Text;
  34 using System.Runtime.InteropServices;
  35
  36 namespace System.IO {
  37         class CStreamReader : StreamReader {
  38                 TermInfoDriver driver;
  39
  40                 public CStreamReader(Stream stream, Encoding encoding)
  41                         : base (stream, encoding)
  42                 {
  43                         driver = (TermInfoDriver) ConsoleDriver.driver;
  44                 }
  45
  46                 public override int Peek ()
  47                 {
  48                         try {
  49                                 return base.Peek ();
  50                         } catch (IOException) {
  51                         }
  52
  53                         return -1;
  54                 }
  55
  56                 public override int Read ()
  57                 {
  58                         try {
  59                                 ConsoleKeyInfo key = Console.ReadKey ();
  60                                 return key.KeyChar;
  61                         } catch (IOException) {
  62                         }
  63
  64                         return(-1);
  65                 }
  66
  67                 public override int Read ([In, Out] char [] dest, int index, int count)
  68                 {
  69                         if (dest == null)
  70                                 throw new ArgumentNullException ("dest");
  71                         if (index < 0)
  72                                 throw new ArgumentOutOfRangeException ("index", "< 0");
  73                         if (count < 0)
  74                                 throw new ArgumentOutOfRangeException ("count", "< 0");
  75                         // ordered to avoid possible integer overflow
  76                         if (index > dest.Length - count)
  77                                 throw new ArgumentException ("index + count > dest.Length");
  78
  79                         try {
  80                                 return driver.Read (dest, index, count);
  81                         } catch (IOException) {
  82                         }
  83
  84                         return 0;
  85                 }
  86
  87                 public override string ReadLine ()
  88                 {
  89                         try {
  90                                 return driver.ReadLine ();
  91                         } catch (IOException) {
  92                         }
  93
  94                         return null;
  95                 }
  96
  97                 public override string ReadToEnd ()
  98                 {
  99                         try {
 100                                 return (base.ReadToEnd ());
 101                         } catch (IOException) {
 102                         }
 103
 104                         return null;
 105                 }
 106         }
 107 }
 108 #endif
 109