mcs/class/corlib/System/CStreamWriter.cs

   1 //
   2 // System.CStreamWriter
   3 //
   4 // Authors:
   5 //   Dietmar Maurer (dietmar@ximian.com)
   6 //   Paolo Molaro (lupus@ximian.com)
   7 //   Dick Porter (dick@ximian.com)
   8 //
   9 // (c) 2006 Novell, Inc.  http://www.novell.com
  10 //
  11
  12 //
  13 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34 #if NET_2_0
  35 using System;
  36 using System.Text;
  37
  38 namespace System.IO {
  39         class CStreamWriter : StreamWriter {
  40                 TermInfoDriver driver;
  41
  42                 public CStreamWriter (Stream stream, Encoding encoding)
  43                         : base (stream, encoding)
  44                 {
  45                         driver = (TermInfoDriver) ConsoleDriver.driver;
  46                 }
  47
  48                 public override void Write (char [] buffer, int index, int count)
  49                 {
  50                         if (count <= 0)
  51                                 return;
  52
  53                         if (!driver.Initialized) {
  54                                 try {
  55                                         base.Write (buffer, index, count);
  56                                 } catch (IOException) {
  57                                 }
  58
  59                                 return;
  60                         }
  61
  62                         lock (this) {
  63                                 int i = 0, j = 0;
  64                                 char []buf;
  65                                 char c;
  66
  67                                 // The idea here is that we want to limit our temp
  68                                 // buffer size - I picked 1k because the underlying
  69                                 // stream implementation seems to break writes into
  70                                 // 1k byte chunks.
  71                                 if (count > 1024)
  72                                         buf = new char[1024];
  73                                 else
  74                                         buf = new char[count];
  75
  76                                 do {
  77                                         do {
  78                                                 c = buffer [index + i++];
  79
  80                                                 if (driver.NotifyWrite (c)) {
  81                                                         buf[j++] = c;
  82                                                         break;
  83                                                 }
  84                                         } while (i < count);
  85
  86                                         if (j == buf.Length || i == count) {
  87                                                 // temp buffer is full, write it out
  88                                                 try {
  89                                                         base.Write (buf, 0, j);
  90                                                 } catch (IOException) {
  91                                                 }
  92
  93                                                 j = 0;
  94                                         }
  95                                 } while (i < count);
  96                         }
  97                 }
  98
  99                 public override void Write (char val)
 100                 {
 101                         lock (this) {
 102                                 try {
 103                                         if (driver.NotifyWrite (val))
 104                                                 InternalWriteChar (val);
 105                                 } catch (IOException) {
 106                                 }
 107                         }
 108                 }
 109
 110                 public void WriteKey (ConsoleKeyInfo key)
 111                 {
 112                         lock (this) {
 113                                 ConsoleKeyInfo copy = new ConsoleKeyInfo (key);
 114                                 if (driver.NotifyWrite (copy))
 115                                         InternalWriteChar (copy.KeyChar);
 116                         }
 117                 }
 118
 119                 public void InternalWriteString (string val)
 120                 {
 121                         try {
 122                                 base.Write (val);
 123                         } catch (IOException) {
 124                         }
 125                 }
 126
 127                 public void InternalWriteChar (char val)
 128                 {
 129                         try {
 130                                 base.Write (val);
 131                         } catch (IOException) {
 132                         }
 133                 }
 134
 135                 public override void Write (char [] val)
 136                 {
 137                         Write (val, 0, val.Length);
 138                 }
 139
 140                 public override void Write (string val)
 141                 {
 142                         if (val == null)
 143                                 return;
 144
 145                         if (driver.Initialized)
 146                                 Write (val.ToCharArray ());
 147                         else {
 148                                 try {
 149                                         base.Write (val);
 150                                 } catch (IOException){
 151
 152                                 }
 153                         }
 154                 }
 155         }
 156 }
 157 #endif
 158