mcs/class/System.XML/System.Xml/XmlConvert.cs

   1 //
   2 // System.Xml.XmlConvert
   3 //
   4 // Authors:
   5 //      Dwivedi, Ajay kumar (Adwiv@Yahoo.com)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //      Alan Tam Siu Lung (Tam@SiuLung.com)
   8 //      Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
   9 //
  10 // (C) 2002 Ximian, Inc (http://www.ximian.com)
  11 //
  12
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33 using System;
  34 using System.IO;
  35 using System.Text;
  36 using System.Globalization;
  37 using System.Xml.Schema;
  38
  39 namespace System.Xml {
  40
  41         public class XmlConvert {
  42
  43                 const string encodedColon = "_x003A_";
  44                 const NumberStyles floatStyle = NumberStyles.AllowCurrencySymbol |
  45                         NumberStyles.AllowExponent |
  46                         NumberStyles.AllowDecimalPoint |
  47                         NumberStyles.AllowLeadingSign;
  48
  49                 static readonly string [] datetimeFormats = {
  50                   // dateTime
  51                   "yyyy-MM-ddTHH:mm:ss",
  52                   "yyyy-MM-ddTHH:mm:ss.f",
  53                   "yyyy-MM-ddTHH:mm:ss.ff",
  54                   "yyyy-MM-ddTHH:mm:ss.fff",
  55                   "yyyy-MM-ddTHH:mm:ss.ffff",
  56                   "yyyy-MM-ddTHH:mm:ss.fffff",
  57                   "yyyy-MM-ddTHH:mm:ss.ffffff",
  58                   "yyyy-MM-ddTHH:mm:ss.fffffff",
  59                   "yyyy-MM-ddTHH:mm:sszzz",
  60                   "yyyy-MM-ddTHH:mm:ss.fzzz",
  61                   "yyyy-MM-ddTHH:mm:ss.ffzzz",
  62                   "yyyy-MM-ddTHH:mm:ss.fffzzz",
  63                   "yyyy-MM-ddTHH:mm:ss.ffffzzz",
  64                   "yyyy-MM-ddTHH:mm:ss.fffffzzz",
  65                   "yyyy-MM-ddTHH:mm:ss.ffffffzzz",
  66                   "yyyy-MM-ddTHH:mm:ss.fffffffzzz",
  67                   "yyyy-MM-ddTHH:mm:ssZ",
  68                   "yyyy-MM-ddTHH:mm:ss.fZ",
  69                   "yyyy-MM-ddTHH:mm:ss.ffZ",
  70                   "yyyy-MM-ddTHH:mm:ss.fffZ",
  71                   "yyyy-MM-ddTHH:mm:ss.ffffZ",
  72                   "yyyy-MM-ddTHH:mm:ss.fffffZ",
  73                   "yyyy-MM-ddTHH:mm:ss.ffffffZ",
  74                   "yyyy-MM-ddTHH:mm:ss.fffffffZ",
  75                   // time
  76                   "HH:mm:ss",
  77                   "HH:mm:ss.f",
  78                   "HH:mm:ss.ff",
  79                   "HH:mm:ss.fff",
  80                   "HH:mm:ss.ffff",
  81                   "HH:mm:ss.fffff",
  82                   "HH:mm:ss.ffffff",
  83                   "HH:mm:ss.fffffff",
  84                   "HH:mm:sszzz",
  85                   "HH:mm:ss.fzzz",
  86                   "HH:mm:ss.ffzzz",
  87                   "HH:mm:ss.fffzzz",
  88                   "HH:mm:ss.ffffzzz",
  89                   "HH:mm:ss.fffffzzz",
  90                   "HH:mm:ss.ffffffzzz",
  91                   "HH:mm:ss.fffffffzzz",
  92                   "HH:mm:ssZ",
  93                   "HH:mm:ss.fZ",
  94                   "HH:mm:ss.ffZ",
  95                   "HH:mm:ss.fffZ",
  96                   "HH:mm:ss.ffffZ",
  97                   "HH:mm:ss.fffffZ",
  98                   "HH:mm:ss.ffffffZ",
  99                   "HH:mm:ss.fffffffZ",
 100                   // date
 101                   "yyyy-MM-dd",
 102                   "yyyy-MM-ddzzz",
 103                   "yyyy-MM-ddZ",
 104                   // gYearMonth
 105                   "yyyy-MM",
 106                   "yyyy-MMzzz",
 107                   "yyyy-MMZ",
 108                   // gYear
 109                   "yyyy",
 110                   "yyyyzzz",
 111                   "yyyyZ",
 112                   // gMonthDay
 113                   "--MM-dd",
 114                   "--MM-ddzzz",
 115                   "--MM-ddZ",
 116                   // gDay
 117                   "---dd",
 118                   "---ddzzz",
 119                   "---ddZ",
 120                 };
 121
 122                 public XmlConvert()
 123                 {}
 124
 125                 private static string TryDecoding (string s)
 126                 {
 127                         if (s == null || s.Length < 6)
 128                                 return s;
 129
 130                         char c = '\uFFFF';
 131                         try {
 132                                 c = (char) Int32.Parse (s.Substring (1, 4), NumberStyles.HexNumber, CultureInfo.InvariantCulture);
 133                         } catch {
 134                                 return s [0] + DecodeName (s.Substring (1));
 135                         }
 136
 137                         if (s.Length == 6)
 138                                 return c.ToString ();
 139                         return c + DecodeName (s.Substring (6));
 140                 }
 141
 142                 public static string DecodeName (string name)
 143                 {
 144                         if (name == null || name.Length == 0)
 145                                 return name;
 146
 147                         int pos = name.IndexOf ('_');
 148                         if (pos == -1 || pos + 6 >= name.Length)
 149                                 return name;
 150
 151                         if ((name [pos + 1] != 'X' && name [pos + 1] != 'x') || name [pos + 6] != '_')
 152                                 return name [0] + DecodeName (name.Substring (1));
 153
 154                         return name.Substring (0, pos) + TryDecoding (name.Substring (pos + 1));
 155                 }
 156
 157                 public static string EncodeLocalName (string name)
 158                 {
 159                         if (name == null)
 160                                 return name;
 161
 162                         string encoded = EncodeName (name);
 163                         int pos = encoded.IndexOf (':');
 164                         if (pos == -1)
 165                                 return encoded;
 166                         return encoded.Replace (":", encodedColon);
 167                 }
 168
 169                 internal static bool IsInvalid (char c, bool firstOnlyLetter)
 170                 {
 171                         if (c == ':') // Special case. allowed in EncodeName, but encoded in EncodeLocalName
 172                                 return false;
 173
 174                         if (firstOnlyLetter)
 175                                 return !XmlChar.IsFirstNameChar (c);
 176                         else
 177                                 return !XmlChar.IsNameChar (c);
 178                 }
 179
 180                 private static string EncodeName (string name, bool nmtoken)
 181                 {
 182                         if (name == null || name.Length == 0)
 183                                 return name;
 184
 185                         StringBuilder sb = new StringBuilder ();
 186                         int length = name.Length;
 187                         for (int i = 0; i < length; i++) {
 188                                 char c = name [i];
 189                                 if (IsInvalid (c, i == 0 && !nmtoken))
 190                                         sb.AppendFormat ("_x{0:X4}_", (int) c);
 191                                 else if (c == '_' && i + 6 < length && name [i+1] == 'x' && name [i + 6] == '_')
 192                                         sb.Append ("_x005F_");
 193                                 else
 194                                         sb.Append (c);
 195                         }
 196                         return sb.ToString ();
 197                 }
 198
 199                 public static string EncodeName (string name)
 200                 {
 201                         return EncodeName (name, false);
 202                 }
 203
 204                 public static string EncodeNmToken (string name)
 205                 {
 206                         if (name == String.Empty)
 207                                 throw new XmlException ("Invalid NmToken: ''");
 208                         return EncodeName (name, true);
 209                 }
 210
 211                 // {true, false, 1, 0}
 212                 public static bool ToBoolean(string s)
 213                 {
 214                         s = s.Trim (XmlChar.WhitespaceChars);
 215                         switch(s)
 216                         {
 217                                 case "1":
 218                                         return true;
 219                                 case "true":
 220                                         return true;
 221                                 case "0":
 222                                         return false;
 223                                 case "false":
 224                                         return false;
 225                                 default:
 226                                         throw new FormatException(s + " is not a valid boolean value");
 227                         }
 228                 }
 229
 230                 // LAMESPEC: It has been documented as public, but is marked as internal.
 231                 internal static string ToBinHexString (byte [] buffer)
 232                 {
 233                         StringWriter w = new StringWriter ();
 234                         WriteBinHex (buffer, 0, buffer.Length, w);
 235                         return w.ToString ();
 236                 }
 237
 238                 internal static void WriteBinHex (byte [] buffer, int index, int count, TextWriter w)
 239                 {
 240                         if (buffer == null)
 241                                 throw new ArgumentNullException ("buffer");
 242                         if (index < 0)
 243                                 throw new ArgumentOutOfRangeException ("index", index, "index must be non negative integer.");
 244                         if (count < 0)
 245                                 throw new ArgumentOutOfRangeException ("count", count, "count must be non negative integer.");
 246                         if (buffer.Length < index + count)
 247                                 throw new ArgumentOutOfRangeException ("index and count must be smaller than the length of the buffer.");
 248
 249                         // Copied from XmlTextWriter.WriteBinHex ()
 250                         int end = index + count;
 251                         for (int i = index; i < end; i++) {
 252                                 int val = buffer [i];
 253                                 int high = val >> 4;
 254                                 int low = val & 15;
 255                                 if (high > 9)
 256                                         w.Write ((char) (high + 55));
 257                                 else
 258                                         w.Write ((char) (high + 0x30));
 259                                 if (low > 9)
 260                                         w.Write ((char) (low + 55));
 261                                 else
 262                                         w.Write ((char) (low + 0x30));
 263                         }
 264                 }
 265
 266                 public static byte ToByte(string s)
 267                 {
 268                         return Byte.Parse(s, CultureInfo.InvariantCulture);
 269                 }
 270
 271                 public static char ToChar(string s)
 272                 {
 273                         return Char.Parse(s);
 274                 }
 275
 276 #if NET_2_0
 277                 [Obsolete]
 278 #endif
 279                 public static DateTime ToDateTime (string s)
 280                 {
 281                         return ToDateTime (s, datetimeFormats);
 282                 }
 283
 284 #if NET_2_0
 285                 public static DateTime ToDateTime (string value, XmlDateTimeSerializationMode mode)
 286                 {
 287                         string modestr = null;
 288                         switch (mode) {
 289                         case XmlDateTimeSerializationMode.Local:
 290                         case XmlDateTimeSerializationMode.RoundTripKind:
 291                         default:
 292                                 return ToDateTime (value, "yyyy-MM-ddTHH:mm:ss.fffffffzzz");
 293                         case XmlDateTimeSerializationMode.Utc:
 294                                 return ToDateTime (value, "yyyy-MM-ddTHH:mm:ss.fffffffZ").ToUniversalTime ();
 295                         case XmlDateTimeSerializationMode.Unspecified:
 296                                 return ToDateTime (value, "yyyy-MM-ddTHH:mm:ss.fffffff");
 297                         }
 298                 }
 299 #endif
 300                 public static DateTime ToDateTime(string s, string format)
 301                 {
 302                         DateTimeFormatInfo d = new DateTimeFormatInfo();
 303                         d.FullDateTimePattern = format;
 304                         return DateTime.Parse(s, d);
 305                 }
 306
 307                 public static DateTime ToDateTime(string s, string[] formats)
 308                 {
 309                         DateTimeStyles style = DateTimeStyles.AllowLeadingWhite |
 310                                                DateTimeStyles.AllowTrailingWhite;
 311                         return DateTime.ParseExact (s, formats, DateTimeFormatInfo.InvariantInfo, style);
 312                 }
 313
 314                 public static Decimal ToDecimal(string s)
 315                 {
 316                         return Decimal.Parse(s, CultureInfo.InvariantCulture);
 317                 }
 318
 319                 public static double ToDouble(string s)
 320                 {
 321                         if (s == null)
 322                                 throw new ArgumentNullException();
 323                         if (s == "INF")
 324                                 return Double.PositiveInfinity;
 325                         if (s == "-INF")
 326                                 return Double.NegativeInfinity;
 327                         if (s == "NaN")
 328                                 return Double.NaN;
 329                         return Double.Parse (s, floatStyle, CultureInfo.InvariantCulture);
 330                 }
 331
 332                 public static Guid ToGuid(string s)
 333                 {
 334                         return new Guid(s);
 335                 }
 336
 337                 public static short ToInt16(string s)
 338                 {
 339                         return Int16.Parse(s, CultureInfo.InvariantCulture);
 340                 }
 341
 342                 public static int ToInt32(string s)
 343                 {
 344                         return Int32.Parse(s, CultureInfo.InvariantCulture);
 345                 }
 346
 347                 public static long ToInt64(string s)
 348                 {
 349                         return Int64.Parse(s, CultureInfo.InvariantCulture);
 350                 }
 351
 352                 [CLSCompliant (false)]
 353                 public static SByte ToSByte(string s)
 354                 {
 355                         return SByte.Parse(s, CultureInfo.InvariantCulture);
 356                 }
 357
 358                 public static float ToSingle(string s)
 359                 {
 360                         if (s == null)
 361                                 throw new ArgumentNullException();
 362                         if (s == "INF")
 363                                 return Single.PositiveInfinity;
 364                         if (s == "-INF")
 365                                 return Single.NegativeInfinity;
 366                         if (s == "NaN")
 367                                 return Single.NaN;
 368                         return Single.Parse(s, floatStyle, CultureInfo.InvariantCulture);
 369                 }
 370
 371                 public static string ToString(Guid value)
 372                 {
 373                         return value.ToString("D", CultureInfo.InvariantCulture);
 374                 }
 375
 376                 public static string ToString(int value)
 377                 {
 378                         return value.ToString(CultureInfo.InvariantCulture);
 379                 }
 380
 381                 public static string ToString(short value)
 382                 {
 383                         return value.ToString(CultureInfo.InvariantCulture);
 384                 }
 385
 386                 public static string ToString(byte value)
 387                 {
 388                         return value.ToString(CultureInfo.InvariantCulture);
 389                 }
 390
 391                 public static string ToString(long value)
 392                 {
 393                         return value.ToString(CultureInfo.InvariantCulture);
 394                 }
 395
 396                 public static string ToString(char value)
 397                 {
 398                         return value.ToString(CultureInfo.InvariantCulture);
 399                 }
 400
 401                 public static string ToString(bool value)
 402                 {
 403                         if (value) return "true";
 404                         return "false";
 405                 }
 406
 407                 [CLSCompliant (false)]
 408                 public static string ToString(SByte value)
 409                 {
 410                         return value.ToString(CultureInfo.InvariantCulture);
 411                 }
 412
 413                 public static string ToString(Decimal value)
 414                 {
 415                         return value.ToString (CultureInfo.InvariantCulture);
 416                 }
 417
 418                 [CLSCompliant (false)]
 419                 public static string ToString(UInt64 value)
 420                 {
 421                         return value.ToString(CultureInfo.InvariantCulture);
 422                 }
 423
 424                 public static string ToString (TimeSpan value)
 425                 {
 426                         StringBuilder builder = new StringBuilder ();
 427                         if (value.Ticks < 0) {
 428                                 builder.Append ('-');
 429                                 value = value.Negate ();
 430                         }
 431                         builder.Append ('P');
 432                         if (value.Days > 0)
 433                                 builder.Append (value.Days).Append ('D');
 434                         if (value.Days > 0 || value.Hours > 0 || value.Minutes > 0 || value.Seconds > 0 || value.Milliseconds > 0) {
 435                                 builder.Append('T');
 436                                 if (value.Hours > 0)
 437                                         builder.Append (value.Hours).Append ('H');
 438                                 if (value.Minutes > 0)
 439                                         builder.Append (value.Minutes).Append ('M');
 440                                 if (value.Seconds > 0 || value.Milliseconds > 0) {
 441                                         builder.Append (value.Seconds);
 442                                         if (value.Milliseconds > 0)
 443                                                 builder.Append ('.').AppendFormat ("{0:000}", value.Milliseconds);
 444                                         builder.Append ('S');
 445                                 }
 446                         }
 447                         return builder.ToString ();
 448                 }
 449
 450                 public static string ToString(double value)
 451                 {
 452                         if (Double.IsNegativeInfinity(value)) return "-INF";
 453                         if (Double.IsPositiveInfinity(value)) return "INF";
 454                         if (Double.IsNaN(value)) return "NaN";
 455 #if TARGET_JVM
 456                         return value.ToString("R", NumberFormatInfo.InvariantInfo);
 457 #else
 458                         return value.ToString(CultureInfo.InvariantCulture);
 459 #endif
 460                 }
 461
 462                 public static string ToString(float value)
 463                 {
 464                         if (Single.IsNegativeInfinity(value)) return "-INF";
 465                         if (Single.IsPositiveInfinity(value)) return "INF";
 466                         if (Single.IsNaN(value)) return "NaN";
 467 #if TARGET_JVM
 468                         return value.ToString("R", NumberFormatInfo.InvariantInfo);
 469 #else
 470                         return value.ToString(CultureInfo.InvariantCulture);
 471 #endif
 472                 }
 473
 474                 [CLSCompliant (false)]
 475                 public static string ToString(UInt32 value)
 476                 {
 477                         return value.ToString(CultureInfo.InvariantCulture);
 478                 }
 479
 480                 [CLSCompliant (false)]
 481                 public static string ToString(UInt16 value)
 482                 {
 483                         return value.ToString(CultureInfo.InvariantCulture);
 484                 }
 485
 486 #if NET_2_0
 487                 [Obsolete]
 488 #endif
 489                 public static string ToString (DateTime value)
 490                 {
 491                         return value.ToString ("yyyy-MM-ddTHH:mm:ss.fffffffzzz", CultureInfo.InvariantCulture);
 492                 }
 493
 494 #if NET_2_0
 495                 public static string ToString (DateTime value, XmlDateTimeSerializationMode mode)
 496                 {
 497                         string modestr = null;
 498                         switch (mode) {
 499                         case XmlDateTimeSerializationMode.Local:
 500                         case XmlDateTimeSerializationMode.RoundTripKind:
 501                         default:
 502                                 return value.ToString (
 503                                         "yyyy-MM-ddTHH:mm:ss.fffffffzzz",
 504                                         CultureInfo.InvariantCulture);
 505                                 break;
 506                         case XmlDateTimeSerializationMode.Utc:
 507                                 return value.ToUniversalTime ().ToString (
 508                                         "yyyy-MM-ddTHH:mm:ss.fffffffZ",
 509                                         CultureInfo.InvariantCulture);
 510                                 break;
 511                         case XmlDateTimeSerializationMode.Unspecified:
 512                                 return value.ToString (
 513                                         "yyyy-MM-ddTHH:mm:ss.fffffff",
 514                                         CultureInfo.InvariantCulture);
 515                                 break;
 516                         }
 517                 }
 518 #endif
 519
 520                 public static string ToString(DateTime value, string format)
 521                 {
 522                         return value.ToString(format, CultureInfo.InvariantCulture);
 523                 }
 524
 525                 public static TimeSpan ToTimeSpan(string s)
 526                 {
 527                         if (s.Length == 0)
 528                                 throw new ArgumentException ("Invalid format string for duration schema datatype.");
 529
 530                         int start = 0;
 531                         if (s [0] == '-')
 532                                 start = 1;
 533                         bool minusValue = (start == 1);
 534
 535                         if (s [start] != 'P')
 536                                 throw new ArgumentException ("Invalid format string for duration schema datatype.");
 537                         start++;
 538
 539                         int parseStep = 0;
 540                         int days = 0;
 541                         bool isTime = false;
 542                         int hours = 0;
 543                         int minutes = 0;
 544                         int seconds = 0;
 545
 546                         bool error = false;
 547
 548                         int i = start;
 549                         while (i < s.Length) {
 550                                 if (s [i] == 'T') {
 551                                         isTime = true;
 552                                         parseStep = 4;
 553                                         i++;
 554                                         start = i;
 555                                         continue;
 556                                 }
 557                                 for (; i < s.Length; i++) {
 558                                         if (!Char.IsDigit (s [i]))
 559                                                 break;
 560                                 }
 561                                 int value = int.Parse (s.Substring (start, i - start), CultureInfo.InvariantCulture);
 562                                 switch (s [i]) {
 563                                 case 'Y':
 564                                         days += value * 365;
 565                                         if (parseStep > 0)
 566                                                 error = true;
 567                                         else
 568                                                 parseStep = 1;
 569                                         break;
 570                                 case 'M':
 571                                         if (parseStep < 2) {
 572                                                 days += 365 * (value / 12) + 30 * (value % 12);
 573                                                 parseStep = 2;
 574                                         } else if (isTime && parseStep < 6) {
 575                                                 minutes = value;
 576                                                 parseStep = 6;
 577                                         }
 578                                         else
 579                                                 error = true;
 580                                         break;
 581                                 case 'D':
 582                                         days += value;
 583                                         if (parseStep > 2)
 584                                                 error = true;
 585                                         else
 586                                                 parseStep = 3;
 587                                         break;
 588                                 case 'H':
 589                                         hours = value;
 590                                         if (!isTime || parseStep > 4)
 591                                                 error = true;
 592                                         else
 593                                                 parseStep = 5;
 594                                         break;
 595                                 case 'S':
 596                                         seconds = value;
 597                                         if (!isTime || parseStep > 6)
 598                                                 error = true;
 599                                         else
 600                                                 parseStep = 7;
 601                                         break;
 602                                 default:
 603                                         error = true;
 604                                         break;
 605                                 }
 606                                 if (error)
 607                                         break;
 608                                 ++i;
 609                                 start = i;
 610                         }
 611                         if (error)
 612                                 throw new ArgumentException ("Invalid format string for duration schema datatype.");
 613                         TimeSpan ts = new TimeSpan (days, hours, minutes, seconds);
 614                         return minusValue ? -ts : ts;
 615                 }
 616
 617                 [CLSCompliant (false)]
 618                 public static UInt16 ToUInt16(string s)
 619                 {
 620                         return UInt16.Parse(s, CultureInfo.InvariantCulture);
 621                 }
 622
 623                 [CLSCompliant (false)]
 624                 public static UInt32 ToUInt32(string s)
 625                 {
 626                         return UInt32.Parse(s, CultureInfo.InvariantCulture);
 627                 }
 628
 629                 [CLSCompliant (false)]
 630                 public static UInt64 ToUInt64(string s)
 631                 {
 632                         return UInt64.Parse(s, CultureInfo.InvariantCulture);
 633                 }
 634
 635                 public static string VerifyName (string name)
 636                 {
 637                         if (name == null)
 638                                 throw new ArgumentNullException("name");
 639
 640                         if (!XmlChar.IsName (name))
 641                                 throw new XmlException("'" + name + "' is not a valid XML Name");
 642                         return name;
 643
 644                 }
 645
 646                 public static string VerifyNCName (string ncname)
 647                 {
 648                         if (ncname == null)
 649                                 throw new ArgumentNullException("ncname");
 650
 651                         if (!XmlChar.IsNCName (ncname))
 652                                 throw new XmlException ("'" + ncname + "' is not a valid XML NCName");
 653                         return ncname;
 654                 }
 655
 656 #if NET_2_0
 657                 public static string VerifyNMTOKEN (string name)
 658 #else
 659                 internal static string VerifyNMTOKEN (string name)
 660 #endif
 661                 {
 662                         if (name == null)
 663                                 throw new ArgumentNullException("name");
 664
 665                         if (!XmlChar.IsNmToken (name))
 666                                 throw new XmlException("'" + name + "' is not a valid XML NMTOKEN");
 667                         return name;
 668
 669                 }
 670
 671                 // It is documented as public method, but in fact it is not.
 672                 internal static byte [] FromBinHexString (string s)
 673                 {
 674                         char [] chars = s.ToCharArray ();
 675                         byte [] bytes = new byte [chars.Length / 2 + chars.Length % 2];
 676                         FromBinHexString (chars, 0, chars.Length, bytes);
 677                         return bytes;
 678                 }
 679
 680                 internal static int FromBinHexString (char [] chars, int offset, int charLength, byte [] buffer)
 681                 {
 682                         int bufIndex = offset;
 683                         for (int i = 0; i < charLength - 1; i += 2) {
 684                                 buffer [bufIndex] = (chars [i] > '9' ?
 685                                                 (byte) (chars [i] - 'A' + 10) :
 686                                                 (byte) (chars [i] - '0'));
 687                                 buffer [bufIndex] <<= 4;
 688                                 buffer [bufIndex] += chars [i + 1] > '9' ?
 689                                                 (byte) (chars [i + 1] - 'A' + 10) :
 690                                                 (byte) (chars [i + 1] - '0');
 691                                 bufIndex++;
 692                         }
 693                         if (charLength %2 != 0)
 694                                 buffer [bufIndex++] = (byte)
 695                                         ((chars [charLength - 1] > '9' ?
 696                                                 (byte) (chars [charLength - 1] - 'A' + 10) :
 697                                                 (byte) (chars [charLength - 1] - '0'))
 698                                         << 4);
 699
 700                         return bufIndex - offset;
 701                 }
 702         }
 703 }