mcs/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_0
  33 using System.Text;
  34 using System.Runtime.InteropServices;
  35
  36 namespace System.IO {
  37         class CStreamReader : StreamReader {
  38                 public CStreamReader(Stream stream, Encoding encoding)
  39                         : base (stream, encoding)
  40                 {
  41                 }
  42
  43                 public override int Peek ()
  44                 {
  45                         try {
  46                                 return base.Peek ();
  47                         } catch (IOException) {
  48                         }
  49
  50                         return -1;
  51                 }
  52
  53                 public override int Read ()
  54                 {
  55                         try {
  56                                 ConsoleKeyInfo key = Console.ReadKey ();
  57                                 return key.KeyChar;
  58                         } catch (IOException) {
  59                         }
  60
  61                         return(-1);
  62                 }
  63
  64                 public override int Read ([In, Out] char [] dest_buffer, int index, int count)
  65                 {
  66                         if (dest_buffer == null)
  67                                 throw new ArgumentNullException ("dest_buffer");
  68                         if (index < 0)
  69                                 throw new ArgumentOutOfRangeException ("index", "< 0");
  70                         if (count < 0)
  71                                 throw new ArgumentOutOfRangeException ("count", "< 0");
  72                         // ordered to avoid possible integer overflow
  73                         if (index > dest_buffer.Length - count)
  74                                 throw new ArgumentException ("index + count > dest_buffer.Length");
  75
  76                         int chars_read = 0;
  77                         while (count > 0) {
  78                                 int c = Read ();
  79                                 if (c < 0)
  80                                         break;
  81                                 chars_read++;
  82                                 count--;
  83
  84                                 dest_buffer [index] = (char) c;
  85                                 //if (CheckEOL (dest_buffer [index++]))
  86                                 //      return chars_read;
  87                         }
  88                         return chars_read;
  89                 }
  90
  91                 public override string ReadLine ()
  92                 {
  93                         try {
  94                                 return ConsoleDriver.driver.ReadLine ();
  95                         } catch (IOException) {
  96                         }
  97
  98                         return null;
  99                 }
 100
 101                 public override string ReadToEnd ()
 102                 {
 103                         try {
 104                                 return (base.ReadToEnd ());
 105                         } catch (IOException) {
 106                         }
 107
 108                         return null;
 109                 }
 110         }
 111 }
 112 #endif
 113