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

   1 //\r
   2 // System.IO.StringWriter\r
   3 //\r
   4 // Authors\r
   5 //      Marcin Szczepanski (marcins@zipworld.com.au)\r
   6 //      Sebastien Pouliot  <sebastien@ximian.com>\r
   7 //\r
   8 // Copyright (C) 2004 Novell (http://www.novell.com)\r
   9 //\r
  10 \r
  11 //\r
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)\r
  13 //\r
  14 // Permission is hereby granted, free of charge, to any person obtaining\r
  15 // a copy of this software and associated documentation files (the\r
  16 // "Software"), to deal in the Software without restriction, including\r
  17 // without limitation the rights to use, copy, modify, merge, publish,\r
  18 // distribute, sublicense, and/or sell copies of the Software, and to\r
  19 // permit persons to whom the Software is furnished to do so, subject to\r
  20 // the following conditions:\r
  21 // \r
  22 // The above copyright notice and this permission notice shall be\r
  23 // included in all copies or substantial portions of the Software.\r
  24 // \r
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,\r
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\r
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\r
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\r
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\r
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\r
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
  32 //\r
  33 \r
  34 using System.Globalization;\r
  35 using System.Text;\r
  36 using System.Runtime.InteropServices;\r
  37 \r
  38 namespace System.IO {\r
  39 \r
  40         [Serializable]\r
  41         [ComVisible (true)]\r
  42         [MonoLimitation ("Serialization format not compatible with .NET")]\r
  43         public class StringWriter : TextWriter {\r
  44                 \r
  45                 private StringBuilder internalString;\r
  46                 private bool disposed = false;\r
  47 \r
  48                 public StringWriter () : this (new StringBuilder ())\r
  49                 {\r
  50                 }\r
  51 \r
  52                 public StringWriter (IFormatProvider formatProvider) :\r
  53                         this (new StringBuilder (), formatProvider)\r
  54                 {\r
  55                 }\r
  56 \r
  57                 public StringWriter (StringBuilder sb) :\r
  58                         this (sb, null)\r
  59                 {\r
  60                 }\r
  61 \r
  62                 public StringWriter (StringBuilder sb, IFormatProvider formatProvider)\r
  63                 {\r
  64                         if (sb == null)\r
  65                                 throw new ArgumentNullException ("sb");\r
  66 \r
  67                         internalString = sb;\r
  68                         internalFormatProvider = formatProvider;\r
  69                 }\r
  70 \r
  71                 public override System.Text.Encoding Encoding {\r
  72                         get {\r
  73                                 return System.Text.Encoding.Unicode;\r
  74                         }\r
  75                 }\r
  76 \r
  77                 public override void Close ()\r
  78                 {\r
  79                         Dispose (true);\r
  80                         disposed = true;\r
  81                 }\r
  82 \r
  83                 protected override void Dispose (bool disposing)\r
  84                 {\r
  85                         // MS.NET doesn't clear internal buffer.\r
  86                         // internalString = null;\r
  87                         base.Dispose (disposing);\r
  88                         disposed = true;\r
  89                 }\r
  90 \r
  91                 public virtual StringBuilder GetStringBuilder ()\r
  92                 {\r
  93                         return internalString;\r
  94                 }\r
  95 \r
  96                 public override string ToString ()\r
  97                 {\r
  98                         return internalString.ToString ();\r
  99                 }\r
 100 \r
 101                 public override void Write (char value)\r
 102                 {\r
 103                         if (disposed) {\r
 104                                 throw new ObjectDisposedException ("StringReader", \r
 105                                         Locale.GetText ("Cannot write to a closed StringWriter"));\r
 106                         }\r
 107 \r
 108                         internalString.Append (value);\r
 109                 }\r
 110 \r
 111                 public override void Write (string value)\r
 112                 {\r
 113                         if (disposed) {\r
 114                                 throw new ObjectDisposedException ("StringReader", \r
 115                                         Locale.GetText ("Cannot write to a closed StringWriter"));\r
 116                         }\r
 117 \r
 118                         internalString.Append (value);\r
 119                 }\r
 120 \r
 121                 public override void Write (char[] buffer, int index, int count)\r
 122                 {\r
 123                         if (disposed) {\r
 124                                 throw new ObjectDisposedException ("StringReader", \r
 125                                         Locale.GetText ("Cannot write to a closed StringWriter"));\r
 126                         }\r
 127                         if (buffer == null)\r
 128                                 throw new ArgumentNullException ("buffer");\r
 129                         if (index < 0)\r
 130                                 throw new ArgumentOutOfRangeException ("index", "< 0");\r
 131                         if (count < 0)\r
 132                                 throw new ArgumentOutOfRangeException ("count", "< 0");\r
 133                         // re-ordered to avoid possible integer overflow\r
 134                         if (index > buffer.Length - count)\r
 135                                 throw new ArgumentException ("index + count > buffer.Length");\r
 136 \r
 137                         internalString.Append (buffer, index, count);\r
 138                 }\r
 139         }\r
 140 }\r
 141               \r