tools/corcompare/WellFormedXmlWriter.cs

   1 //
   2 // WellFormedXmlWriter.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2006 Novell, Inc. http://www.novell.com
   8 //
   9 using System;
  10 using System.Globalization;
  11 using System.Collections;
  12 using System.Xml;
  13
  14 namespace CorCompare {
  15
  16         public class WellFormedXmlWriter : DefaultXmlWriter
  17         {
  18                 public static bool IsValid (int ch)
  19                 {
  20                         return !IsInvalid (ch);
  21                 }
  22
  23                 public static bool IsInvalid (int ch)
  24                 {
  25                         switch (ch) {
  26                         case 9:
  27                         case 10:
  28                         case 13:
  29                                 return false;
  30                         }
  31                         if (ch < 32)
  32                                 return true;
  33                         if (ch < 0xD800)
  34                                 return false;
  35                         if (ch < 0xE000)
  36                                 return true;
  37                         if (ch < 0xFFFE)
  38                                 return false;
  39                         if (ch < 0x10000)
  40                                 return true;
  41                         if (ch < 0x110000)
  42                                 return false;
  43                         else
  44                                 return true;
  45                 }
  46
  47                 public static int IndexOfInvalid (string s, bool allowSurrogate)
  48                 {
  49                         for (int i = 0; i < s.Length; i++)
  50                                 if (IsInvalid (s [i])) {
  51                                         if (!allowSurrogate ||
  52                                             i + 1 == s.Length ||
  53                                             s [i] < '\uD800' ||
  54                                             s [i] >= '\uDC00' ||
  55                                             s [i + 1] < '\uDC00' ||
  56                                             s [i + 1] >= '\uE000')
  57                                                 return i;
  58                                         i++;
  59                                 }
  60                         return -1;
  61                 }
  62
  63                 public static int IndexOfInvalid (char [] s, int start, int length, bool allowSurrogate)
  64                 {
  65                         int end = start + length;
  66                         if (s.Length < end)
  67                                 throw new ArgumentOutOfRangeException ("length");
  68                         for (int i = start; i < end; i++)
  69                                 if (IsInvalid (s [i])) {
  70                                         if (!allowSurrogate ||
  71                                             i + 1 == end ||
  72                                             s [i] < '\uD800' ||
  73                                             s [i] >= '\uDC00' ||
  74                                             s [i + 1] < '\uDC00' ||
  75                                             s [i + 1] >= '\uE000')
  76                                                 return i;
  77                                         i++;
  78                                 }
  79                         return -1;
  80                 }
  81
  82                 public WellFormedXmlWriter (XmlWriter writer) : base (writer)
  83                 {
  84                 }
  85
  86                 public override void WriteString (string text)
  87                 {
  88                         int i = IndexOfInvalid (text, true);
  89                         if (i >= 0) {
  90                                 char [] arr = text.ToCharArray ();
  91                                 Writer.WriteChars (arr, 0, i);
  92                                 WriteChars (arr, i, arr.Length - i);
  93                         } else {
  94                                 // no invalid character.
  95                                 Writer.WriteString (text);
  96                         }
  97                 }
  98
  99                 public override void WriteChars (char [] text, int idx, int length)
 100                 {
 101                         int start = idx;
 102                         int end = idx + length;
 103                         while ((idx = IndexOfInvalid (text, start, length, true)) >= 0) {
 104                                 if (start < idx)
 105                                         Writer.WriteChars (text, start, idx - start);
 106                                 Writer.WriteString (String.Format (CultureInfo.InvariantCulture,
 107                                         text [idx] < 0x80 ? "\\x{0:X02}" : "\\u{0:X04}",
 108                                         (int) text [idx]));
 109                                 length -= idx - start + 1;
 110                                 start = idx + 1;
 111                         }
 112                         if (start < end)
 113                                 Writer.WriteChars (text, start, end - start);
 114                 }
 115
 116         }
 117
 118         public class DefaultXmlWriter : XmlWriter
 119         {
 120                 XmlWriter writer;
 121
 122                 public DefaultXmlWriter (XmlWriter writer)
 123                 {
 124                         this.writer = writer;
 125                 }
 126
 127                 protected XmlWriter Writer {
 128                         get { return writer; }
 129                 }
 130
 131                 public override void Close ()
 132                 {
 133                         writer.Close ();
 134                 }
 135
 136                 public override void Flush ()
 137                 {
 138                         writer.Flush ();
 139                 }
 140
 141                 public override string LookupPrefix (string ns)
 142                 {
 143                         return writer.LookupPrefix (ns);
 144                 }
 145
 146                 public override void WriteBase64 (byte [] buffer, int index, int count)
 147                 {
 148                         writer.WriteBase64 (buffer, index, count);
 149                 }
 150
 151                 public override void WriteBinHex (byte [] buffer, int index, int count)
 152                 {
 153                         writer.WriteBinHex (buffer, index, count);
 154                 }
 155
 156                 public override void WriteCData (string text)
 157                 {
 158                         writer.WriteCData (text);
 159                 }
 160
 161                 public override void WriteCharEntity (char ch)
 162                 {
 163                         writer.WriteCharEntity (ch);
 164                 }
 165
 166                 public override void WriteChars (char [] buffer, int index, int count)
 167                 {
 168                         writer.WriteChars (buffer, index, count);
 169                 }
 170
 171                 public override void WriteComment (string text)
 172                 {
 173                         writer.WriteComment (text);
 174                 }
 175
 176                 public override void WriteDocType (string name, string pubid, string sysid, string subset)
 177                 {
 178                         writer.WriteDocType (name, pubid, sysid, subset);
 179                 }
 180
 181                 public override void WriteEndAttribute ()
 182                 {
 183                         writer.WriteEndAttribute ();
 184                 }
 185
 186                 public override void WriteEndDocument ()
 187                 {
 188                         writer.WriteEndDocument ();
 189                 }
 190
 191                 public override void WriteEndElement ()
 192                 {
 193                         writer.WriteEndElement ();
 194                 }
 195
 196                 public override void WriteEntityRef (string name)
 197                 {
 198                         writer.WriteEntityRef (name);
 199                 }
 200
 201                 public override void WriteFullEndElement ()
 202                 {
 203                         writer.WriteFullEndElement ();
 204                 }
 205
 206                 public override void WriteName (string name)
 207                 {
 208                         writer.WriteName (name);
 209                 }
 210
 211                 public override void WriteNmToken (string name)
 212                 {
 213                         writer.WriteNmToken (name);
 214                 }
 215
 216                 public override void WriteNode (XmlReader reader, bool defattr)
 217                 {
 218                         writer.WriteNode (reader, defattr);
 219                 }
 220
 221                 public override void WriteProcessingInstruction (string name, string text)
 222                 {
 223                         writer.WriteProcessingInstruction (name, text);
 224                 }
 225
 226                 public override void WriteQualifiedName (string localName, string ns)
 227                 {
 228                         writer.WriteQualifiedName (localName, ns);
 229                 }
 230
 231                 public override void WriteRaw (string data)
 232                 {
 233                         writer.WriteRaw (data);
 234                 }
 235
 236                 public override void WriteRaw (char [] buffer, int index, int count)
 237                 {
 238                         writer.WriteRaw (buffer, index, count);
 239                 }
 240
 241                 public override void WriteStartAttribute (string prefix, string localName, string ns)
 242                 {
 243                         writer.WriteStartAttribute (prefix, localName, ns);
 244                 }
 245
 246                 public override void WriteStartDocument (bool standalone)
 247                 {
 248                         writer.WriteStartDocument (standalone);
 249                 }
 250
 251                 public override void WriteStartDocument ()
 252                 {
 253                         writer.WriteStartDocument ();
 254                 }
 255
 256                 public override void WriteStartElement (string prefix, string localName, string ns)
 257                 {
 258                         writer.WriteStartElement (prefix, localName, ns);
 259                 }
 260
 261                 public override void WriteString (string text)
 262                 {
 263                         writer.WriteString (text);
 264                 }
 265
 266                 public override void WriteSurrogateCharEntity (char lowChar, char highChar)
 267                 {
 268                         writer.WriteSurrogateCharEntity (lowChar, highChar);
 269                 }
 270
 271                 public override void WriteWhitespace (string ws)
 272                 {
 273                         writer.WriteWhitespace (ws);
 274                 }
 275
 276                 public override WriteState WriteState {
 277                         get {
 278                                 return writer.WriteState;
 279                         }
 280                 }
 281
 282                 public override string XmlLang {
 283                         get {
 284                                 return writer.XmlLang;
 285                         }
 286                 }
 287
 288                 public override XmlSpace XmlSpace {
 289                         get {
 290                                 return writer.XmlSpace;
 291                         }
 292                 }
 293         }
 294 }