mcs/class/corlib/System.Text/StringBuilder.cs

   1 // -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
   2 //
   3 // System.Text.StringBuilder
   4 //
   5 // Authors:
   6 //   Marcin Szczepanski (marcins@zipworld.com.au)
   7 //   Paolo Molaro (lupus@ximian.com)
   8 //   Patrik Torstensson
   9 //
  10 // NOTE: In the case the buffer is only filled by 50% a new string
  11 //       will be returned by ToString() is cached in the '_cached_str'
  12 //               cache_string will also control if a string has been handed out
  13 //               to via ToString(). If you are chaning the code make sure that
  14 //               if you modify the string data set the cache_string to null.
  15 //
  16
  17 //
  18 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  19 //
  20 // Permission is hereby granted, free of charge, to any person obtaining
  21 // a copy of this software and associated documentation files (the
  22 // "Software"), to deal in the Software without restriction, including
  23 // without limitation the rights to use, copy, modify, merge, publish,
  24 // distribute, sublicense, and/or sell copies of the Software, and to
  25 // permit persons to whom the Software is furnished to do so, subject to
  26 // the following conditions:
  27 //
  28 // The above copyright notice and this permission notice shall be
  29 // included in all copies or substantial portions of the Software.
  30 //
  31 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  32 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  33 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  34 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  35 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  36 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  37 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  38 //
  39 using System.Runtime.Serialization;
  40 using System.Runtime.CompilerServices;
  41 using System.Runtime.InteropServices;
  42
  43 namespace System.Text {
  44
  45         [Serializable]
  46 #if NET_2_0
  47         [ComVisible (true)]
  48 #endif
  49         [MonoTODO ("Fix serialization compatibility with MS.NET")]
  50         public sealed class StringBuilder
  51 #if NET_2_0
  52                 : ISerializable
  53 #endif
  54         {
  55                 private int _length;
  56                 private string _str;
  57                 private string _cached_str;
  58
  59                 private int _maxCapacity = Int32.MaxValue;
  60                 private const int constDefaultCapacity = 16;
  61
  62                 public StringBuilder(string value, int startIndex, int length, int capacity)
  63                 {
  64                         // first, check the parameters and throw appropriate exceptions if needed
  65                         if (null == value)
  66                                 value = "";
  67
  68                         // make sure startIndex is zero or positive
  69                         if (startIndex < 0)
  70                                 throw new System.ArgumentOutOfRangeException ("startIndex", startIndex, "StartIndex cannot be less than zero.");
  71
  72                         // make sure length is zero or positive
  73                         if(length < 0)
  74                                 throw new System.ArgumentOutOfRangeException ("length", length, "Length cannot be less than zero.");
  75
  76                         if (capacity < 0)
  77                                 throw new System.ArgumentOutOfRangeException ("capacity", capacity, "capacity must be greater than zero.");
  78
  79                         // make sure startIndex and length give a valid substring of value
  80                         // re-ordered to avoid possible integer overflow
  81                         if (startIndex > value.Length - length)
  82                                 throw new System.ArgumentOutOfRangeException ("startIndex", startIndex, "StartIndex and length must refer to a location within the string.");
  83
  84                         if (capacity == 0)
  85                                 capacity = constDefaultCapacity;
  86
  87                         _str = String.InternalAllocateStr ((length > capacity) ? length : capacity);
  88                         if (length > 0)
  89                                 String.InternalStrcpy(_str, 0, value, startIndex, length);
  90
  91                         _length = length;
  92                 }
  93
  94                 public StringBuilder () : this (null) {}
  95
  96                 public StringBuilder(int capacity) : this (String.Empty, 0, 0, capacity) {}
  97
  98                 public StringBuilder(int capacity, int maxCapacity) : this (String.Empty, 0, 0, capacity) {
  99                         if (maxCapacity < 1)
 100                                 throw new System.ArgumentOutOfRangeException ("maxCapacity", "maxCapacity is less than one.");
 101                         if (capacity > maxCapacity)
 102                                 throw new System.ArgumentOutOfRangeException ("capacity", "Capacity exceeds maximum capacity.");
 103
 104                         _maxCapacity = maxCapacity;
 105                 }
 106
 107                 public StringBuilder (string value)
 108                 {
 109                         /*
 110                          * This is an optimization to avoid allocating the internal string
 111                          * until the first Append () call.
 112                          * The runtime pinvoke marshalling code needs to be aware of this.
 113                          */
 114                         if (null == value)
 115                                 value = "";
 116
 117                         _length = value.Length;
 118                         _str = _cached_str = value;
 119                 }
 120
 121                 public StringBuilder( string value, int capacity) : this(value, 0, value.Length, capacity) {}
 122
 123                 public int MaxCapacity {
 124                         get {
 125                                 // MS runtime always returns Int32.MaxValue.
 126                                 return _maxCapacity;
 127                         }
 128                 }
 129
 130                 public int Capacity {
 131                         get {
 132                                 if (_str.Length == 0)
 133                                         return constDefaultCapacity;
 134
 135                                 return _str.Length;
 136                         }
 137
 138                         set {
 139                                 if (value < _length)
 140                                         throw new ArgumentException( "Capacity must be larger than length" );
 141
 142                                 InternalEnsureCapacity(value);
 143                         }
 144                 }
 145
 146                 public int Length {
 147                         get {
 148                                 return _length;
 149                         }
 150
 151                         set {
 152                                 if( value < 0 || value > _maxCapacity)
 153                                         throw new ArgumentOutOfRangeException();
 154
 155                                 if (value == _length)
 156                                         return;
 157
 158                                 if (value < _length) {
 159                                         // LAMESPEC:  The spec is unclear as to what to do
 160                                         // with the capacity when truncating the string.
 161
 162                                         // Do as MS, keep the capacity
 163
 164                                         // Make sure that we invalidate any cached string.
 165                                         InternalEnsureCapacity (value);
 166                                         _length = value;
 167                                 } else {
 168                                         // Expand the capacity to the new length and
 169                                         // pad the string with NULL characters.
 170                                         Append('\0', value - _length);
 171                                 }
 172                         }
 173                 }
 174
 175                 [IndexerName("Chars")]
 176                 public char this [int index] {
 177                         get {
 178                                 if (index >= _length || index < 0)
 179                                         throw new IndexOutOfRangeException();
 180
 181                                 return _str [index];
 182                         }
 183
 184                         set {
 185                                 if (index >= _length || index < 0)
 186                                         throw new IndexOutOfRangeException();
 187
 188                                 if (null != _cached_str)
 189                                         InternalEnsureCapacity (_length);
 190
 191                                 _str.InternalSetChar (index, value);
 192                         }
 193                 }
 194
 195                 public override string ToString ()
 196                 {
 197                         if (_length == 0)
 198                                 return String.Empty;
 199
 200                         if (null != _cached_str)
 201                                 return _cached_str;
 202
 203                         // If we only have a half-full buffer we return a new string.
 204                         if (_length < (_str.Length >> 1))
 205                         {
 206                                 _cached_str = _str.Substring(0, _length);
 207                                 return _cached_str;
 208                         }
 209
 210                         _cached_str = _str;
 211                         _str.InternalSetLength(_length);
 212
 213                         return _str;
 214                 }
 215
 216                 public string ToString (int startIndex, int length)
 217                 {
 218                         // re-ordered to avoid possible integer overflow
 219                         if (startIndex < 0 || length < 0 || startIndex > _length - length)
 220                                 throw new ArgumentOutOfRangeException();
 221
 222                         return _str.Substring (startIndex, length);
 223                 }
 224
 225                 public int EnsureCapacity (int capacity)
 226                 {
 227                         if (capacity < 0)
 228                                 throw new ArgumentOutOfRangeException ("Capacity must be greater than 0." );
 229
 230                         if( capacity <= _str.Length )
 231                                 return _str.Length;
 232
 233                         InternalEnsureCapacity (capacity);
 234
 235                         return _str.Length;
 236                 }
 237
 238                 public bool Equals (StringBuilder sb)
 239                 {
 240                         if (_length == sb.Length && _str == sb._str )
 241                                 return true;
 242
 243                         return false;
 244                 }
 245
 246                 public StringBuilder Remove (int startIndex, int length)
 247                 {
 248                         // re-ordered to avoid possible integer overflow
 249                         if (startIndex < 0 || length < 0 || startIndex > _length - length)
 250                                 throw new ArgumentOutOfRangeException();
 251
 252                         if (null != _cached_str)
 253                                 InternalEnsureCapacity (_length);
 254
 255                         // Copy everything after the 'removed' part to the start
 256                         // of the removed part and truncate the sLength
 257                         if (_length - (startIndex + length) > 0)
 258                                 String.InternalStrcpy (_str, startIndex, _str, startIndex + length, _length - (startIndex + length));
 259
 260                         _length -= length;
 261
 262                         return this;
 263                 }
 264
 265                 public StringBuilder Replace (char oldChar, char newChar)
 266                 {
 267                         return Replace( oldChar, newChar, 0, _length);
 268                 }
 269
 270                 public StringBuilder Replace (char oldChar, char newChar, int startIndex, int count)
 271                 {
 272                         // re-ordered to avoid possible integer overflow
 273                         if (startIndex > _length - count || startIndex < 0 || count < 0)
 274                                 throw new ArgumentOutOfRangeException();
 275
 276                         if (null != _cached_str)
 277                                 InternalEnsureCapacity (_str.Length);
 278
 279                         for (int replaceIterate = startIndex; replaceIterate < startIndex + count; replaceIterate++ ) {
 280                                 if( _str [replaceIterate] == oldChar )
 281                                         _str.InternalSetChar (replaceIterate, newChar);
 282                         }
 283
 284                         return this;
 285                 }
 286
 287                 public StringBuilder Replace( string oldValue, string newValue ) {
 288                         return Replace (oldValue, newValue, 0, _length);
 289                 }
 290
 291                 public StringBuilder Replace( string oldValue, string newValue, int startIndex, int count )
 292                 {
 293                         if (oldValue == null)
 294                                 throw new ArgumentNullException ("The old value cannot be null.");
 295
 296                         if (startIndex < 0 || count < 0 || startIndex > _length - count)
 297                                 throw new ArgumentOutOfRangeException ();
 298
 299                         if (oldValue.Length == 0)
 300                                 throw new ArgumentException ("The old value cannot be zero length.");
 301
 302                         // TODO: OPTIMIZE!
 303                         string replace = _str.Substring(startIndex, count).Replace(oldValue, newValue);
 304
 305                         InternalEnsureCapacity (replace.Length + (_length - count));
 306
 307                         string end = _str.Substring (startIndex + count, _length - startIndex - count );
 308
 309                         String.InternalStrcpy (_str, startIndex, replace);
 310                         String.InternalStrcpy (_str, startIndex + replace.Length, end);
 311
 312                         _length = replace.Length + (_length - count);
 313
 314                         return this;
 315                 }
 316
 317
 318                 /* The Append Methods */
 319                 public StringBuilder Append (char[] value)
 320                 {
 321                         if (value == null)
 322                                 return this;
 323
 324                         int needed_cap = _length + value.Length;
 325                         if (null != _cached_str || _str.Length < needed_cap)
 326                                 InternalEnsureCapacity (needed_cap);
 327
 328                         String.InternalStrcpy (_str, _length, value);
 329                         _length = needed_cap;
 330
 331                         return this;
 332                 }
 333
 334                 public StringBuilder Append (string value)
 335                 {
 336                         if (value == null)
 337                                 return this;
 338
 339                         if (_length == 0 && value.Length < _maxCapacity && value.Length > _str.Length) {
 340                                 _length = value.Length;
 341                                 _str = _cached_str = value;
 342                                 return this;
 343                         }
 344
 345                         int needed_cap = _length + value.Length;
 346                         if (null != _cached_str || _str.Length < needed_cap)
 347                                 InternalEnsureCapacity (needed_cap);
 348
 349                         String.InternalStrcpy (_str, _length, value);
 350                         _length = needed_cap;
 351                         return this;
 352                 }
 353
 354                 public StringBuilder Append (bool value) {
 355                         return Append (value.ToString());
 356                 }
 357
 358                 public StringBuilder Append (byte value) {
 359                         return Append (value.ToString());
 360                 }
 361
 362                 public StringBuilder Append (decimal value) {
 363                         return Append (value.ToString());
 364                 }
 365
 366                 public StringBuilder Append (double value) {
 367                         return Append (value.ToString());
 368                 }
 369
 370                 public StringBuilder Append (short value) {
 371                         return Append (value.ToString());
 372                 }
 373
 374                 public StringBuilder Append (int value) {
 375                         return Append (value.ToString());
 376                 }
 377
 378                 public StringBuilder Append (long value) {
 379                         return Append (value.ToString());
 380                 }
 381
 382                 public StringBuilder Append (object value) {
 383                         if (value == null)
 384                                 return this;
 385
 386                         return Append (value.ToString());
 387                 }
 388
 389                 [CLSCompliant(false)]
 390                 public StringBuilder Append (sbyte value) {
 391                         return Append (value.ToString());
 392                 }
 393
 394                 public StringBuilder Append (float value) {
 395                         return Append (value.ToString());
 396                 }
 397
 398                 [CLSCompliant(false)]
 399                 public StringBuilder Append (ushort value) {
 400                         return Append (value.ToString());
 401                 }
 402
 403                 [CLSCompliant(false)]
 404                 public StringBuilder Append (uint value) {
 405                         return Append (value.ToString());
 406                 }
 407
 408                 [CLSCompliant(false)]
 409                 public StringBuilder Append (ulong value) {
 410                         return Append (value.ToString());
 411                 }
 412
 413                 public StringBuilder Append (char value)
 414                 {
 415                         int needed_cap = _length + 1;
 416                         if (null != _cached_str || _str.Length < needed_cap)
 417                                 InternalEnsureCapacity (needed_cap);
 418
 419                         _str.InternalSetChar(_length, value);
 420                         _length = needed_cap;
 421
 422                         return this;
 423                 }
 424
 425                 public StringBuilder Append (char value, int repeatCount)
 426                 {
 427                         if( repeatCount < 0 )
 428                                 throw new ArgumentOutOfRangeException();
 429
 430                         InternalEnsureCapacity (_length + repeatCount);
 431
 432                         for (int i = 0; i < repeatCount; i++)
 433                                 _str.InternalSetChar (_length++, value);
 434
 435                         return this;
 436                 }
 437
 438                 public StringBuilder Append( char[] value, int startIndex, int charCount )
 439                 {
 440                         if (value == null) {
 441                                 if (!(startIndex == 0 && charCount == 0))
 442                                         throw new ArgumentNullException ("value");
 443
 444                                 return this;
 445                         }
 446
 447                         if ((charCount < 0 || startIndex < 0) || (startIndex > value.Length - charCount))
 448                                 throw new ArgumentOutOfRangeException();
 449
 450                         int needed_cap = _length + charCount;
 451                         InternalEnsureCapacity (needed_cap);
 452
 453                         String.InternalStrcpy (_str, _length, value, startIndex, charCount);
 454                         _length = needed_cap;
 455
 456                         return this;
 457                 }
 458
 459                 public StringBuilder Append (string value, int startIndex, int count)
 460                 {
 461                         if (value == null) {
 462                                 if (startIndex != 0 && count != 0)
 463                                         throw new ArgumentNullException ("value");
 464
 465                                 return this;
 466                         }
 467
 468                         if ((count < 0 || startIndex < 0) || (startIndex > value.Length - count))
 469                                 throw new ArgumentOutOfRangeException();
 470
 471                         int needed_cap = _length + count;
 472                         if (null != _cached_str || _str.Length < needed_cap)
 473                                 InternalEnsureCapacity (needed_cap);
 474
 475                         String.InternalStrcpy (_str, _length, value, startIndex, count);
 476
 477                         _length = needed_cap;
 478
 479                         return this;
 480                 }
 481
 482 #if NET_2_0
 483                 [ComVisible (false)]
 484                 public StringBuilder AppendLine ()
 485                 {
 486                         return Append (System.Environment.NewLine);
 487                 }
 488
 489                 [ComVisible (false)]
 490                 public StringBuilder AppendLine (string value)
 491                 {
 492                         return Append (value).Append (System.Environment.NewLine);
 493                 }
 494 #endif
 495
 496                 public StringBuilder AppendFormat (string format, object arg0)
 497                 {
 498                         return AppendFormat (null, format, new object [] { arg0 });
 499                 }
 500
 501                 public StringBuilder AppendFormat (string format, params object[] args)
 502                 {
 503                         return AppendFormat (null, format, args);
 504                 }
 505
 506                 public StringBuilder AppendFormat (IFormatProvider provider,
 507                                                    string format,
 508                                                    params object[] args)
 509                 {
 510                         String.FormatHelper (this, provider, format, args);
 511                         return this;
 512                 }
 513
 514                 public StringBuilder AppendFormat (string format, object arg0, object arg1)
 515                 {
 516                         return AppendFormat (null, format, new object [] { arg0, arg1 });
 517                 }
 518
 519                 public StringBuilder AppendFormat (string format, object arg0, object arg1, object arg2)
 520                 {
 521                         return AppendFormat (null, format, new object [] { arg0, arg1, arg2 });
 522                 }
 523
 524                 /*  The Insert Functions */
 525
 526                 public StringBuilder Insert (int index, char[] value)
 527                 {
 528                         return Insert (index, new string (value));
 529                 }
 530
 531                 public StringBuilder Insert (int index, string value)
 532                 {
 533                         if( index > _length || index < 0)
 534                                 throw new ArgumentOutOfRangeException();
 535
 536                         if (value == null || value.Length == 0)
 537                                 return this;
 538
 539                         InternalEnsureCapacity (_length + value.Length);
 540
 541                         // Move everything to the right of the insert point across
 542                         String.InternalStrcpy (_str, index + value.Length, _str, index, _length - index);
 543
 544                         // Copy in stuff from the insert buffer
 545                         String.InternalStrcpy (_str, index, value);
 546
 547                         _length += value.Length;
 548
 549                         return this;
 550                 }
 551
 552                 public StringBuilder Insert( int index, bool value ) {
 553                         return Insert (index, value.ToString());
 554                 }
 555
 556                 public StringBuilder Insert( int index, byte value ) {
 557                         return Insert (index, value.ToString());
 558                 }
 559
 560                 public StringBuilder Insert( int index, char value)
 561                 {
 562                         if (index > _length || index < 0)
 563                                 throw new ArgumentOutOfRangeException ("index");
 564
 565                         InternalEnsureCapacity (_length + 1);
 566
 567                         // Move everything to the right of the insert point across
 568                         String.InternalStrcpy (_str, index + 1, _str, index, _length - index);
 569
 570                         _str.InternalSetChar (index, value);
 571                         _length++;
 572
 573                         return this;
 574                 }
 575
 576                 public StringBuilder Insert( int index, decimal value ) {
 577                         return Insert (index, value.ToString());
 578                 }
 579
 580                 public StringBuilder Insert( int index, double value ) {
 581                         return Insert (index, value.ToString());
 582                 }
 583
 584                 public StringBuilder Insert( int index, short value ) {
 585                         return Insert (index, value.ToString());
 586                 }
 587
 588                 public StringBuilder Insert( int index, int value ) {
 589                         return Insert (index, value.ToString());
 590                 }
 591
 592                 public StringBuilder Insert( int index, long value ) {
 593                         return Insert (index, value.ToString());
 594                 }
 595
 596                 public StringBuilder Insert( int index, object value ) {
 597                         return Insert (index, value.ToString());
 598                 }
 599
 600                 [CLSCompliant(false)]
 601                 public StringBuilder Insert( int index, sbyte value ) {
 602                         return Insert (index, value.ToString() );
 603                 }
 604
 605                 public StringBuilder Insert (int index, float value) {
 606                         return Insert (index, value.ToString() );
 607                 }
 608
 609                 [CLSCompliant(false)]
 610                 public StringBuilder Insert (int index, ushort value) {
 611                         return Insert (index, value.ToString() );
 612                 }
 613
 614                 [CLSCompliant(false)]
 615                 public StringBuilder Insert (int index, uint value) {
 616                         return Insert ( index, value.ToString() );
 617                 }
 618
 619                 [CLSCompliant(false)]
 620                 public StringBuilder Insert (int index, ulong value) {
 621                         return Insert ( index, value.ToString() );
 622                 }
 623
 624                 public StringBuilder Insert (int index, string value, int count)
 625                 {
 626                         // LAMESPEC: The spec says to throw an exception if
 627                         // count < 0, while MS throws even for count < 1!
 628                         if ( count < 0 )
 629                                 throw new ArgumentOutOfRangeException();
 630
 631                         if (value != null && value != String.Empty)
 632                                 for (int insertCount = 0; insertCount < count; insertCount++)
 633                                         Insert( index, value );
 634
 635                         return this;
 636                 }
 637
 638                 public StringBuilder Insert (int index, char [] value, int startIndex, int charCount)
 639                 {
 640                         if (value == null) {
 641                                 if (startIndex == 0 && charCount == 0)
 642                                         return this;
 643
 644                                 throw new ArgumentNullException ("value");
 645                         }
 646
 647                         if (charCount < 0 || startIndex < 0 || startIndex > value.Length - charCount)
 648                                 throw new ArgumentOutOfRangeException ();
 649
 650                         return Insert (index, new String (value, startIndex, charCount));
 651                 }
 652
 653                 private void InternalEnsureCapacity (int size)
 654                 {
 655                         if (size > _str.Length || (object) _cached_str == (object) _str) {
 656                                 int capacity = _str.Length;
 657
 658                                 // Try double buffer, if that doesn't work, set the length as capacity
 659                                 if (size > capacity) {
 660
 661                                         // The first time a string is appended, we just set _cached_str
 662                                         // and _str to it. This allows us to do some optimizations.
 663                                         // Below, we take this into account.
 664                                         if ((object) _cached_str == (object) _str && capacity < constDefaultCapacity)
 665                                                 capacity = constDefaultCapacity;
 666
 667                                         capacity = capacity << 1;
 668                                         if (size > capacity)
 669                                                 capacity = size;
 670
 671                                         if (capacity >= Int32.MaxValue || capacity < 0)
 672                                                 capacity = Int32.MaxValue;
 673
 674                                         if (capacity > _maxCapacity && size <= _maxCapacity)
 675                                                 capacity = _maxCapacity;
 676
 677                                         if (capacity > _maxCapacity)
 678                                                 throw new ArgumentOutOfRangeException ("size", "capacity was less than the current size.");
 679                                 }
 680
 681                                 string tmp = String.InternalAllocateStr (capacity);
 682                                 if (_length > 0)
 683                                         String.InternalStrcpy (tmp, 0, _str, 0, _length);
 684
 685                                 _str = tmp;
 686                         }
 687
 688                         _cached_str = null;
 689                 }
 690
 691 #if NET_2_0
 692                 [ComVisible (false)]
 693                 public void CopyTo (int sourceIndex, char [] destination, int destinationIndex, int count)
 694                 {
 695                         if (destination == null)
 696                                 throw new ArgumentNullException ("destination");
 697                         if ((Length - count < sourceIndex) ||
 698                             (destination.Length -count < destinationIndex) ||
 699                             (sourceIndex < 0 || destinationIndex < 0 || count < 0))
 700                                 throw new ArgumentOutOfRangeException ();
 701
 702                         for (int i = 0; i < count; i++)
 703                                 destination [destinationIndex+i] = _str [sourceIndex+i];
 704                 }
 705
 706                 void ISerializable.GetObjectData (SerializationInfo info, StreamingContext context)
 707                 {
 708                         info.AddValue ("m_MaxCapacity", _maxCapacity);
 709                         info.AddValue ("Capacity", Capacity);
 710                         info.AddValue ("m_StringValue", ToString ());
 711                         info.AddValue ("m_currentThread", 0);
 712                 }
 713
 714                 StringBuilder (SerializationInfo info, StreamingContext context)
 715                 {
 716                         string s = info.GetString ("m_StringValue");
 717                         if (s == null)
 718                                 s = "";
 719                         _length = s.Length;
 720                         _str = _cached_str = s;
 721
 722                         _maxCapacity = info.GetInt32 ("m_MaxCapacity");
 723                         if (_maxCapacity < 0)
 724                                 _maxCapacity = Int32.MaxValue;
 725                         Capacity = info.GetInt32 ("Capacity");
 726                 }
 727 #endif
 728         }
 729 }