mcs/class/corlib/System.IO/UnexceptionalStreamReader.cs

   1 //
   2 // System.IO.UnexceptionalStreamReader.cs
   3 //
   4 // Authors:
   5 //   Dietmar Maurer (dietmar@ximian.com)
   6 //   Miguel de Icaza (miguel@ximian.com)
   7 //   Dick Porter (dick@ximian.com)
   8 //
   9 // (C) Ximian, Inc.  http://www.ximian.com
  10 // Copyright (C) 2004 Novell (http://www.novell.com)
  11 //
  12
  13 //
  14 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  15 //
  16 // Permission is hereby granted, free of charge, to any person obtaining
  17 // a copy of this software and associated documentation files (the
  18 // "Software"), to deal in the Software without restriction, including
  19 // without limitation the rights to use, copy, modify, merge, publish,
  20 // distribute, sublicense, and/or sell copies of the Software, and to
  21 // permit persons to whom the Software is furnished to do so, subject to
  22 // the following conditions:
  23 //
  24 // The above copyright notice and this permission notice shall be
  25 // included in all copies or substantial portions of the Software.
  26 //
  27 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  31 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  32 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  33 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  34 //
  35
  36
  37 // This is a wrapper around StreamReader used by System.Console that
  38 // catches IOException so that graphical applications don't suddenly
  39 // get IO errors when their terminal vanishes.  See
  40 // UnexceptionalStreamWriter too.
  41
  42 using System;
  43 using System.Text;
  44 using System.Runtime.InteropServices;
  45
  46 namespace System.IO {
  47         internal class UnexceptionalStreamReader : StreamReader {
  48                 public UnexceptionalStreamReader(Stream stream)
  49                         : base (stream)
  50                 {
  51                 }
  52
  53                 public UnexceptionalStreamReader(Stream stream, bool detect_encoding_from_bytemarks)
  54                         : base (stream, detect_encoding_from_bytemarks)
  55                 {
  56                 }
  57
  58                 public UnexceptionalStreamReader(Stream stream, Encoding encoding)
  59                         : base (stream, encoding)
  60                 {
  61                 }
  62
  63                 public UnexceptionalStreamReader(Stream stream, Encoding encoding, bool detect_encoding_from_bytemarks)
  64                         : base (stream, encoding, detect_encoding_from_bytemarks)
  65                 {
  66                 }
  67
  68                 public UnexceptionalStreamReader(Stream stream, Encoding encoding, bool detect_encoding_from_bytemarks, int buffer_size)
  69                         : base (stream, encoding, detect_encoding_from_bytemarks, buffer_size)
  70                 {
  71                 }
  72
  73                 public UnexceptionalStreamReader(string path)
  74                         : base (path)
  75                 {
  76                 }
  77
  78                 public UnexceptionalStreamReader(string path, bool detect_encoding_from_bytemarks)
  79                         : base (path, detect_encoding_from_bytemarks)
  80                 {
  81                 }
  82
  83                 public UnexceptionalStreamReader(string path, Encoding encoding)
  84                         : base (path, encoding)
  85                 {
  86                 }
  87
  88                 public UnexceptionalStreamReader(string path, Encoding encoding, bool detect_encoding_from_bytemarks)
  89                         : base (path, encoding, detect_encoding_from_bytemarks)
  90                 {
  91                 }
  92
  93                 public UnexceptionalStreamReader(string path, Encoding encoding, bool detect_encoding_from_bytemarks, int buffer_size)
  94                         : base (path, encoding, detect_encoding_from_bytemarks, buffer_size)
  95                 {
  96                 }
  97
  98                 public override int Peek ()
  99                 {
 100                         try {
 101                                 return(base.Peek ());
 102                         } catch (IOException) {
 103                         }
 104
 105                         return(-1);
 106                 }
 107
 108                 public override int Read ()
 109                 {
 110                         try {
 111                                 return(base.Read ());
 112                         } catch (IOException) {
 113                         }
 114
 115                         return(-1);
 116                 }
 117
 118                 public override int Read ([In, Out] char[] dest_buffer,
 119                                           int index, int count)
 120                 {
 121                         try {
 122                                 return(base.Read (dest_buffer, index, count));
 123                         } catch (IOException) {
 124                         }
 125
 126                         return(0);
 127                 }
 128
 129                 public override string ReadLine()
 130                 {
 131                         try {
 132                                 return(base.ReadLine ());
 133                         } catch (IOException) {
 134                         }
 135
 136                         return(null);
 137                 }
 138
 139                 public override string ReadToEnd()
 140                 {
 141                         try {
 142                                 return(base.ReadToEnd ());
 143                         } catch (IOException) {
 144                         }
 145
 146                         return(null);
 147                 }
 148         }
 149 }