src/common/string.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        string.cpp
   3 // Purpose:     wxString class
   4 // Author:      Vadim Zeitlin, Ryan Norton
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 //              (c) 2004 Ryan Norton <wxprojects@comcast.net>
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 /*
  14  * About ref counting:
  15  *  1) all empty strings use g_strEmpty, nRefs = -1 (set in Init())
  16  *  2) AllocBuffer() sets nRefs to 1, Lock() increments it by one
  17  *  3) Unlock() decrements nRefs and frees memory if it goes to 0
  18  */
  19
  20 // ===========================================================================
  21 // headers, declarations, constants
  22 // ===========================================================================
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28   #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32   #include "wx/defs.h"
  33   #include "wx/string.h"
  34   #include "wx/intl.h"
  35   #include "wx/thread.h"
  36 #endif
  37
  38 #include <ctype.h>
  39 #include <string.h>
  40 #include <stdlib.h>
  41
  42 #ifndef __WXMSW__
  43 #include <errno.h>
  44 #endif
  45
  46 #ifdef __SALFORDC__
  47   #include <clib.h>
  48 #endif
  49
  50 // allocating extra space for each string consumes more memory but speeds up
  51 // the concatenation operations (nLen is the current string's length)
  52 // NB: EXTRA_ALLOC must be >= 0!
  53 #define EXTRA_ALLOC       (19 - nLen % 16)
  54
  55 // ---------------------------------------------------------------------------
  56 // static class variables definition
  57 // ---------------------------------------------------------------------------
  58
  59 #if !wxUSE_STL
  60   //According to STL _must_ be a -1 size_t
  61   const size_t wxStringBase::npos = (size_t) -1;
  62 #endif
  63
  64 // ----------------------------------------------------------------------------
  65 // static data
  66 // ----------------------------------------------------------------------------
  67
  68 #if wxUSE_STL
  69
  70 extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = _T("");
  71
  72 #else
  73
  74 // for an empty string, GetStringData() will return this address: this
  75 // structure has the same layout as wxStringData and it's data() method will
  76 // return the empty string (dummy pointer)
  77 static const struct
  78 {
  79   wxStringData data;
  80   wxChar dummy;
  81 } g_strEmpty = { {-1, 0, 0}, wxT('\0') };
  82
  83 // empty C style string: points to 'string data' byte of g_strEmpty
  84 extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = &g_strEmpty.dummy;
  85
  86 #endif
  87
  88 // ----------------------------------------------------------------------------
  89 // global functions
  90 // ----------------------------------------------------------------------------
  91
  92 #if wxUSE_STD_IOSTREAM
  93
  94 // MS Visual C++ version 5.0 provides the new STL headers as well as the old
  95 // iostream ones.
  96 //
  97 // ATTN: you can _not_ use both of these in the same program!
  98
  99 #include <iostream>
 100
 101 wxSTD istream& operator>>(wxSTD istream& is, wxString& WXUNUSED(str))
 102 {
 103 #if 0
 104   int w = is.width(0);
 105   if ( is.ipfx(0) ) {
 106     streambuf *sb = is.rdbuf();
 107     str.erase();
 108     while ( true ) {
 109       int ch = sb->sbumpc ();
 110       if ( ch == EOF ) {
 111         is.setstate(ios::eofbit);
 112         break;
 113       }
 114       else if ( isspace(ch) ) {
 115         sb->sungetc();
 116         break;
 117       }
 118
 119       str += ch;
 120       if ( --w == 1 )
 121         break;
 122     }
 123   }
 124
 125   is.isfx();
 126   if ( str.length() == 0 )
 127     is.setstate(ios::failbit);
 128 #endif
 129   return is;
 130 }
 131
 132 wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str)
 133 {
 134   os << str.c_str();
 135   return os;
 136 }
 137
 138 #endif // wxUSE_STD_IOSTREAM
 139
 140 // ----------------------------------------------------------------------------
 141 // private classes
 142 // ----------------------------------------------------------------------------
 143
 144 // this small class is used to gather statistics for performance tuning
 145 //#define WXSTRING_STATISTICS
 146 #ifdef  WXSTRING_STATISTICS
 147   class Averager
 148   {
 149   public:
 150     Averager(const wxChar *sz) { m_sz = sz; m_nTotal = m_nCount = 0; }
 151    ~Averager()
 152    { wxPrintf("wxString: average %s = %f\n", m_sz, ((float)m_nTotal)/m_nCount); }
 153
 154     void Add(size_t n) { m_nTotal += n; m_nCount++; }
 155
 156   private:
 157     size_t m_nCount, m_nTotal;
 158     const wxChar *m_sz;
 159   } g_averageLength("allocation size"),
 160     g_averageSummandLength("summand length"),
 161     g_averageConcatHit("hit probability in concat"),
 162     g_averageInitialLength("initial string length");
 163
 164   #define STATISTICS_ADD(av, val) g_average##av.Add(val)
 165 #else
 166   #define STATISTICS_ADD(av, val)
 167 #endif // WXSTRING_STATISTICS
 168
 169 #if !wxUSE_STL
 170
 171 // ===========================================================================
 172 // wxStringData class deallocation
 173 // ===========================================================================
 174
 175 #if defined(__VISUALC__) && defined(_MT) && !defined(_DLL)
 176 #  pragma message (__FILE__ ": building with Multithreaded non DLL runtime has a performance impact on wxString!")
 177 void wxStringData::Free()
 178 {
 179     free(this);
 180 }
 181 #endif
 182
 183 // ===========================================================================
 184 // wxStringBase
 185 // ===========================================================================
 186
 187 // takes nLength elements of psz starting at nPos
 188 void wxStringBase::InitWith(const wxChar *psz, size_t nPos, size_t nLength)
 189 {
 190   Init();
 191
 192   // if the length is not given, assume the string to be NUL terminated
 193   if ( nLength == npos ) {
 194     wxASSERT_MSG( nPos <= wxStrlen(psz), _T("index out of bounds") );
 195
 196     nLength = wxStrlen(psz + nPos);
 197   }
 198
 199   STATISTICS_ADD(InitialLength, nLength);
 200
 201   if ( nLength > 0 ) {
 202     // trailing '\0' is written in AllocBuffer()
 203     if ( !AllocBuffer(nLength) ) {
 204       wxFAIL_MSG( _T("out of memory in wxStringBase::InitWith") );
 205       return;
 206     }
 207     wxTmemcpy(m_pchData, psz + nPos, nLength);
 208   }
 209 }
 210
 211 // poor man's iterators are "void *" pointers
 212 wxStringBase::wxStringBase(const void *pStart, const void *pEnd)
 213 {
 214   InitWith((const wxChar *)pStart, 0,
 215            (const wxChar *)pEnd - (const wxChar *)pStart);
 216 }
 217
 218 wxStringBase::wxStringBase(size_type n, wxChar ch)
 219 {
 220   Init();
 221   append(n, ch);
 222 }
 223
 224 // ---------------------------------------------------------------------------
 225 // memory allocation
 226 // ---------------------------------------------------------------------------
 227
 228 // allocates memory needed to store a C string of length nLen
 229 bool wxStringBase::AllocBuffer(size_t nLen)
 230 {
 231   // allocating 0 sized buffer doesn't make sense, all empty strings should
 232   // reuse g_strEmpty
 233   wxASSERT( nLen >  0 );
 234
 235   // make sure that we don't overflow
 236   wxASSERT( nLen < (INT_MAX / sizeof(wxChar)) -
 237                    (sizeof(wxStringData) + EXTRA_ALLOC + 1) );
 238
 239   STATISTICS_ADD(Length, nLen);
 240
 241   // allocate memory:
 242   // 1) one extra character for '\0' termination
 243   // 2) sizeof(wxStringData) for housekeeping info
 244   wxStringData* pData = (wxStringData*)
 245     malloc(sizeof(wxStringData) + (nLen + EXTRA_ALLOC + 1)*sizeof(wxChar));
 246
 247   if ( pData == NULL ) {
 248     // allocation failures are handled by the caller
 249     return false;
 250   }
 251
 252   pData->nRefs        = 1;
 253   pData->nDataLength  = nLen;
 254   pData->nAllocLength = nLen + EXTRA_ALLOC;
 255   m_pchData           = pData->data();  // data starts after wxStringData
 256   m_pchData[nLen]     = wxT('\0');
 257   return true;
 258 }
 259
 260 // must be called before changing this string
 261 bool wxStringBase::CopyBeforeWrite()
 262 {
 263   wxStringData* pData = GetStringData();
 264
 265   if ( pData->IsShared() ) {
 266     pData->Unlock();                // memory not freed because shared
 267     size_t nLen = pData->nDataLength;
 268     if ( !AllocBuffer(nLen) ) {
 269       // allocation failures are handled by the caller
 270       return false;
 271     }
 272     wxTmemcpy(m_pchData, pData->data(), nLen);
 273   }
 274
 275   wxASSERT( !GetStringData()->IsShared() );  // we must be the only owner
 276
 277   return true;
 278 }
 279
 280 // must be called before replacing contents of this string
 281 bool wxStringBase::AllocBeforeWrite(size_t nLen)
 282 {
 283   wxASSERT( nLen != 0 );  // doesn't make any sense
 284
 285   // must not share string and must have enough space
 286   wxStringData* pData = GetStringData();
 287   if ( pData->IsShared() || pData->IsEmpty() ) {
 288     // can't work with old buffer, get new one
 289     pData->Unlock();
 290     if ( !AllocBuffer(nLen) ) {
 291       // allocation failures are handled by the caller
 292       return false;
 293     }
 294   }
 295   else {
 296     if ( nLen > pData->nAllocLength ) {
 297       // realloc the buffer instead of calling malloc() again, this is more
 298       // efficient
 299       STATISTICS_ADD(Length, nLen);
 300
 301       nLen += EXTRA_ALLOC;
 302
 303       pData = (wxStringData*)
 304           realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
 305
 306       if ( pData == NULL ) {
 307         // allocation failures are handled by the caller
 308         // keep previous data since reallocation failed
 309         return false;
 310       }
 311
 312       pData->nAllocLength = nLen;
 313       m_pchData = pData->data();
 314     }
 315   }
 316
 317   wxASSERT( !GetStringData()->IsShared() );  // we must be the only owner
 318
 319   // it doesn't really matter what the string length is as it's going to be
 320   // overwritten later but, for extra safety, set it to 0 for now as we may
 321   // have some junk in m_pchData
 322   GetStringData()->nDataLength = 0;
 323
 324   return true;
 325 }
 326
 327 wxStringBase& wxStringBase::append(size_t n, wxChar ch)
 328 {
 329     size_type len = length();
 330
 331     if ( !Alloc(len + n) || !CopyBeforeWrite() ) {
 332       wxFAIL_MSG( _T("out of memory in wxStringBase::append") );
 333     }
 334     GetStringData()->nDataLength = len + n;
 335     m_pchData[len + n] = '\0';
 336     for ( size_t i = 0; i < n; ++i )
 337         m_pchData[len + i] = ch;
 338     return *this;
 339 }
 340
 341 void wxStringBase::resize(size_t nSize, wxChar ch)
 342 {
 343     size_t len = length();
 344
 345     if ( nSize < len )
 346     {
 347         erase(begin() + nSize, end());
 348     }
 349     else if ( nSize > len )
 350     {
 351         append(nSize - len, ch);
 352     }
 353     //else: we have exactly the specified length, nothing to do
 354 }
 355
 356 // allocate enough memory for nLen characters
 357 bool wxStringBase::Alloc(size_t nLen)
 358 {
 359   wxStringData *pData = GetStringData();
 360   if ( pData->nAllocLength <= nLen ) {
 361     if ( pData->IsEmpty() ) {
 362       nLen += EXTRA_ALLOC;
 363
 364       wxStringData* pData = (wxStringData*)
 365           malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
 366
 367       if ( pData == NULL ) {
 368         // allocation failure handled by caller
 369         return false;
 370       }
 371
 372       pData->nRefs = 1;
 373       pData->nDataLength = 0;
 374       pData->nAllocLength = nLen;
 375       m_pchData = pData->data();  // data starts after wxStringData
 376       m_pchData[0u] = wxT('\0');
 377     }
 378     else if ( pData->IsShared() ) {
 379       pData->Unlock();                // memory not freed because shared
 380       size_t nOldLen = pData->nDataLength;
 381       if ( !AllocBuffer(nLen) ) {
 382         // allocation failure handled by caller
 383         return false;
 384       }
 385       // +1 to copy the terminator, too
 386       memcpy(m_pchData, pData->data(), (nOldLen+1)*sizeof(wxChar));
 387       GetStringData()->nDataLength = nOldLen;
 388     }
 389     else {
 390       nLen += EXTRA_ALLOC;
 391
 392       pData = (wxStringData *)
 393         realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
 394
 395       if ( pData == NULL ) {
 396         // allocation failure handled by caller
 397         // keep previous data since reallocation failed
 398         return false;
 399       }
 400
 401       // it's not important if the pointer changed or not (the check for this
 402       // is not faster than assigning to m_pchData in all cases)
 403       pData->nAllocLength = nLen;
 404       m_pchData = pData->data();
 405     }
 406   }
 407   //else: we've already got enough
 408   return true;
 409 }
 410
 411 wxStringBase::iterator wxStringBase::begin()
 412 {
 413     if (length() > 0)
 414         CopyBeforeWrite();
 415     return m_pchData;
 416 }
 417
 418 wxStringBase::iterator wxStringBase::end()
 419 {
 420     if (length() > 0)
 421         CopyBeforeWrite();
 422     return m_pchData + length();
 423 }
 424
 425 wxStringBase::iterator wxStringBase::erase(iterator it)
 426 {
 427     size_type idx = it - begin();
 428     erase(idx, 1);
 429     return begin() + idx;
 430 }
 431
 432 wxStringBase& wxStringBase::erase(size_t nStart, size_t nLen)
 433 {
 434   wxASSERT(nStart <= length());
 435   size_t strLen = length() - nStart;
 436   // delete nLen or up to the end of the string characters
 437   nLen = strLen < nLen ? strLen : nLen;
 438   wxString strTmp(c_str(), nStart);
 439   strTmp.append(c_str() + nStart + nLen, length() - nStart - nLen);
 440
 441   swap(strTmp);
 442   return *this;
 443 }
 444
 445 wxStringBase& wxStringBase::insert(size_t nPos, const wxChar *sz, size_t n)
 446 {
 447   wxASSERT( nPos <= length() );
 448
 449   if ( n == npos ) n = wxStrlen(sz);
 450   if ( n == 0 ) return *this;
 451
 452   if ( !Alloc(length() + n) || !CopyBeforeWrite() ) {
 453     wxFAIL_MSG( _T("out of memory in wxStringBase::insert") );
 454   }
 455
 456   memmove(m_pchData + nPos + n, m_pchData + nPos,
 457           (length() - nPos) * sizeof(wxChar));
 458   memcpy(m_pchData + nPos, sz, n * sizeof(wxChar));
 459   GetStringData()->nDataLength = length() + n;
 460   m_pchData[length()] = '\0';
 461
 462   return *this;
 463 }
 464
 465 void wxStringBase::swap(wxStringBase& str)
 466 {
 467     wxChar* tmp = str.m_pchData;
 468     str.m_pchData = m_pchData;
 469     m_pchData = tmp;
 470 }
 471
 472 size_t wxStringBase::find(const wxStringBase& str, size_t nStart) const
 473 {
 474   wxASSERT( str.GetStringData()->IsValid() );
 475   wxASSERT( nStart <= length() );
 476
 477   //anchor
 478   const wxChar* p = (const wxChar*)wxTmemchr(c_str() + nStart,
 479                                             str.c_str()[0],
 480                                             length() - nStart);
 481
 482   if(!p)
 483       return npos;
 484
 485   while(p - c_str() + str.length() <= length() &&
 486         wxTmemcmp(p, str.c_str(), str.length()) )
 487   {
 488       //Previosly passed as the first argument to wxTmemchr,
 489       //but C/C++ standard does not specify evaluation order
 490       //of arguments to functions -
 491       //http://embedded.com/showArticle.jhtml?articleID=9900607
 492       ++p;
 493
 494       //anchor again
 495       p = (const wxChar*)wxTmemchr(p,
 496                                   str.c_str()[0],
 497                                   length() - (p - c_str()));
 498
 499       if(!p)
 500           return npos;
 501   }
 502
 503    return (p - c_str() + str.length() <= length()) ? p - c_str() : npos;
 504 }
 505
 506 size_t wxStringBase::find(const wxChar* sz, size_t nStart, size_t n) const
 507 {
 508   return find(wxStringBase(sz, n), nStart);
 509 }
 510
 511 size_t wxStringBase::find(wxChar ch, size_t nStart) const
 512 {
 513   wxASSERT( nStart <= length() );
 514
 515   const wxChar *p = (const wxChar*)wxTmemchr(c_str() + nStart, ch, length() - nStart);
 516
 517   return p == NULL ? npos : p - c_str();
 518 }
 519
 520 size_t wxStringBase::rfind(const wxStringBase& str, size_t nStart) const
 521 {
 522     wxASSERT( str.GetStringData()->IsValid() );
 523     wxASSERT( nStart == npos || nStart <= length() );
 524
 525     if ( length() >= str.length() )
 526     {
 527         // avoids a corner case later
 528         if ( length() == 0 && str.length() == 0 )
 529             return 0;
 530
 531         // "top" is the point where search starts from
 532         size_t top = length() - str.length();
 533
 534         if ( nStart == npos )
 535             nStart = length() - 1;
 536         if ( nStart < top )
 537             top = nStart;
 538
 539         const wxChar *cursor = c_str() + top;
 540         do
 541         {
 542             if ( wxTmemcmp(cursor, str.c_str(),
 543                         str.length()) == 0 )
 544             {
 545                 return cursor - c_str();
 546             }
 547         } while ( cursor-- > c_str() );
 548     }
 549
 550     return npos;
 551 }
 552
 553 size_t wxStringBase::rfind(const wxChar* sz, size_t nStart, size_t n) const
 554 {
 555     return rfind(wxStringBase(sz, n), nStart);
 556 }
 557
 558 size_t wxStringBase::rfind(wxChar ch, size_t nStart) const
 559 {
 560     if ( nStart == npos )
 561     {
 562         nStart = length();
 563     }
 564     else
 565     {
 566         wxASSERT( nStart <= length() );
 567     }
 568
 569     const wxChar *actual;
 570     for ( actual = c_str() + ( nStart == npos ? length() : nStart + 1 );
 571           actual > c_str(); --actual )
 572     {
 573         if ( *(actual - 1) == ch )
 574             return (actual - 1) - c_str();
 575     }
 576
 577     return npos;
 578 }
 579
 580 size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart) const
 581 {
 582     wxASSERT(nStart <= length());
 583
 584     size_t len = wxStrlen(sz);
 585
 586     size_t i;
 587     for(i = nStart; i < this->length(); ++i)
 588     {
 589         if (wxTmemchr(sz, *(c_str() + i), len))
 590             break;
 591     }
 592
 593     if(i == this->length())
 594         return npos;
 595     else
 596         return i;
 597 }
 598
 599 size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart,
 600                                    size_t n) const
 601 {
 602     return find_first_of(wxStringBase(sz, n), nStart);
 603 }
 604
 605 size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart) const
 606 {
 607     if ( nStart == npos )
 608     {
 609         nStart = length() - 1;
 610     }
 611     else
 612     {
 613         wxASSERT_MSG( nStart <= length(),
 614                         _T("invalid index in find_last_of()") );
 615     }
 616
 617     size_t len = wxStrlen(sz);
 618
 619     for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p )
 620     {
 621         if ( wxTmemchr(sz, *p, len) )
 622             return p - c_str();
 623     }
 624
 625     return npos;
 626 }
 627
 628 size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart,
 629                                    size_t n) const
 630 {
 631     return find_last_of(wxStringBase(sz, n), nStart);
 632 }
 633
 634 size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart) const
 635 {
 636     if ( nStart == npos )
 637     {
 638         nStart = length();
 639     }
 640     else
 641     {
 642         wxASSERT( nStart <= length() );
 643     }
 644
 645     size_t len = wxStrlen(sz);
 646
 647     size_t i;
 648     for(i = nStart; i < this->length(); ++i)
 649     {
 650         if (!wxTmemchr(sz, *(c_str() + i), len))
 651             break;
 652     }
 653
 654     if(i == this->length())
 655          return npos;
 656      else
 657         return i;
 658 }
 659
 660 size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart,
 661                                        size_t n) const
 662 {
 663     return find_first_not_of(wxStringBase(sz, n), nStart);
 664 }
 665
 666 size_t wxStringBase::find_first_not_of(wxChar ch, size_t nStart) const
 667 {
 668     wxASSERT( nStart <= length() );
 669
 670     for ( const wxChar *p = c_str() + nStart; *p; p++ )
 671     {
 672         if ( *p != ch )
 673             return p - c_str();
 674     }
 675
 676     return npos;
 677 }
 678
 679 size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart) const
 680 {
 681     if ( nStart == npos )
 682     {
 683         nStart = length() - 1;
 684     }
 685     else
 686     {
 687         wxASSERT( nStart <= length() );
 688     }
 689
 690     size_t len = wxStrlen(sz);
 691
 692     for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p )
 693     {
 694         if ( !wxTmemchr(sz, *p,len) )
 695              return p - c_str();
 696     }
 697
 698     return npos;
 699 }
 700
 701 size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart,
 702                                       size_t n) const
 703 {
 704     return find_last_not_of(wxStringBase(sz, n), nStart);
 705 }
 706
 707 size_t wxStringBase::find_last_not_of(wxChar ch, size_t nStart) const
 708 {
 709     if ( nStart == npos )
 710     {
 711         nStart = length() - 1;
 712     }
 713     else
 714     {
 715         wxASSERT( nStart <= length() );
 716     }
 717
 718     for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p )
 719     {
 720         if ( *p != ch )
 721             return p - c_str();
 722     }
 723
 724     return npos;
 725 }
 726
 727 wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen,
 728                                     const wxChar *sz)
 729 {
 730   wxASSERT_MSG( nStart <= length(),
 731                 _T("index out of bounds in wxStringBase::replace") );
 732   size_t strLen = length() - nStart;
 733   nLen = strLen < nLen ? strLen : nLen;
 734
 735   wxStringBase strTmp;
 736   strTmp.reserve(length()); // micro optimisation to avoid multiple mem allocs
 737
 738   //This is kind of inefficient, but its pretty good considering...
 739   //we don't want to use character access operators here because on STL
 740   //it will freeze the reference count of strTmp, which means a deep copy
 741   //at the end when swap is called
 742   //
 743   //Also, we can't use append with the full character pointer and must
 744   //do it manually because this string can contain null characters
 745   for(size_t i1 = 0; i1 < nStart; ++i1)
 746       strTmp.append(1, this->c_str()[i1]);
 747
 748   //its safe to do the full version here because
 749   //sz must be a normal c string
 750   strTmp.append(sz);
 751
 752   for(size_t i2 = nStart + nLen; i2 < length(); ++i2)
 753       strTmp.append(1, this->c_str()[i2]);
 754
 755   swap(strTmp);
 756   return *this;
 757 }
 758
 759 wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen,
 760                                     size_t nCount, wxChar ch)
 761 {
 762   return replace(nStart, nLen, wxStringBase(nCount, ch).c_str());
 763 }
 764
 765 wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen,
 766                                     const wxStringBase& str,
 767                                     size_t nStart2, size_t nLen2)
 768 {
 769   return replace(nStart, nLen, str.substr(nStart2, nLen2));
 770 }
 771
 772 wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen,
 773                                     const wxChar* sz, size_t nCount)
 774 {
 775   return replace(nStart, nLen, wxStringBase(sz, nCount).c_str());
 776 }
 777
 778 wxStringBase wxStringBase::substr(size_t nStart, size_t nLen) const
 779 {
 780   if ( nLen == npos )
 781     nLen = length() - nStart;
 782   return wxStringBase(*this, nStart, nLen);
 783 }
 784
 785 // assigns one string to another
 786 wxStringBase& wxStringBase::operator=(const wxStringBase& stringSrc)
 787 {
 788   wxASSERT( stringSrc.GetStringData()->IsValid() );
 789
 790   // don't copy string over itself
 791   if ( m_pchData != stringSrc.m_pchData ) {
 792     if ( stringSrc.GetStringData()->IsEmpty() ) {
 793       Reinit();
 794     }
 795     else {
 796       // adjust references
 797       GetStringData()->Unlock();
 798       m_pchData = stringSrc.m_pchData;
 799       GetStringData()->Lock();
 800     }
 801   }
 802
 803   return *this;
 804 }
 805
 806 // assigns a single character
 807 wxStringBase& wxStringBase::operator=(wxChar ch)
 808 {
 809   if ( !AssignCopy(1, &ch) ) {
 810     wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(wxChar)") );
 811   }
 812   return *this;
 813 }
 814
 815 // assigns C string
 816 wxStringBase& wxStringBase::operator=(const wxChar *psz)
 817 {
 818   if ( !AssignCopy(wxStrlen(psz), psz) ) {
 819     wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(const wxChar *)") );
 820   }
 821   return *this;
 822 }
 823
 824 // helper function: does real copy
 825 bool wxStringBase::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData)
 826 {
 827   if ( nSrcLen == 0 ) {
 828     Reinit();
 829   }
 830   else {
 831     if ( !AllocBeforeWrite(nSrcLen) ) {
 832       // allocation failure handled by caller
 833       return false;
 834     }
 835     memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(wxChar));
 836     GetStringData()->nDataLength = nSrcLen;
 837     m_pchData[nSrcLen] = wxT('\0');
 838   }
 839   return true;
 840 }
 841
 842 // ---------------------------------------------------------------------------
 843 // string concatenation
 844 // ---------------------------------------------------------------------------
 845
 846 // add something to this string
 847 bool wxStringBase::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData,
 848                               size_t nMaxLen)
 849 {
 850   STATISTICS_ADD(SummandLength, nSrcLen);
 851
 852   nSrcLen = nSrcLen < nMaxLen ? nSrcLen : nMaxLen;
 853
 854   // concatenating an empty string is a NOP
 855   if ( nSrcLen > 0 ) {
 856     wxStringData *pData = GetStringData();
 857     size_t nLen = pData->nDataLength;
 858     size_t nNewLen = nLen + nSrcLen;
 859
 860     // alloc new buffer if current is too small
 861     if ( pData->IsShared() ) {
 862       STATISTICS_ADD(ConcatHit, 0);
 863
 864       // we have to allocate another buffer
 865       wxStringData* pOldData = GetStringData();
 866       if ( !AllocBuffer(nNewLen) ) {
 867           // allocation failure handled by caller
 868           return false;
 869       }
 870       memcpy(m_pchData, pOldData->data(), nLen*sizeof(wxChar));
 871       pOldData->Unlock();
 872     }
 873     else if ( nNewLen > pData->nAllocLength ) {
 874       STATISTICS_ADD(ConcatHit, 0);
 875
 876       reserve(nNewLen);
 877       // we have to grow the buffer
 878       if ( capacity() < nNewLen ) {
 879           // allocation failure handled by caller
 880           return false;
 881       }
 882     }
 883     else {
 884       STATISTICS_ADD(ConcatHit, 1);
 885
 886       // the buffer is already big enough
 887     }
 888
 889     // should be enough space
 890     wxASSERT( nNewLen <= GetStringData()->nAllocLength );
 891
 892     // fast concatenation - all is done in our buffer
 893     memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(wxChar));
 894
 895     m_pchData[nNewLen] = wxT('\0');          // put terminating '\0'
 896     GetStringData()->nDataLength = nNewLen; // and fix the length
 897   }
 898   //else: the string to append was empty
 899   return true;
 900 }
 901
 902 // ---------------------------------------------------------------------------
 903 // simple sub-string extraction
 904 // ---------------------------------------------------------------------------
 905
 906 // helper function: clone the data attached to this string
 907 bool wxStringBase::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const
 908 {
 909   if ( nCopyLen == 0 ) {
 910     dest.Init();
 911   }
 912   else {
 913     if ( !dest.AllocBuffer(nCopyLen) ) {
 914       // allocation failure handled by caller
 915       return false;
 916     }
 917     memcpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen*sizeof(wxChar));
 918   }
 919   return true;
 920 }
 921
 922 #endif // !wxUSE_STL
 923
 924 #if !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE)
 925
 926 #if !wxUSE_STL
 927     #define STRINGCLASS wxStringBase
 928 #else
 929     #define STRINGCLASS wxString
 930 #endif
 931
 932 static inline int wxDoCmp(const wxChar* s1, size_t l1,
 933                           const wxChar* s2, size_t l2)
 934 {
 935     if( l1 == l2 )
 936         return wxTmemcmp(s1, s2, l1);
 937     else if( l1 < l2 )
 938     {
 939         int ret = wxTmemcmp(s1, s2, l1);
 940         return ret == 0 ? -1 : ret;
 941     }
 942     else
 943     {
 944         int ret = wxTmemcmp(s1, s2, l2);
 945         return ret == 0 ? +1 : ret;
 946     }
 947 }
 948
 949 int STRINGCLASS::compare(const wxStringBase& str) const
 950 {
 951     return ::wxDoCmp(data(), length(), str.data(), str.length());
 952 }
 953
 954 int STRINGCLASS::compare(size_t nStart, size_t nLen,
 955                          const wxStringBase& str) const
 956 {
 957     wxASSERT(nStart <= length());
 958     size_type strLen = length() - nStart;
 959     nLen = strLen < nLen ? strLen : nLen;
 960     return ::wxDoCmp(data() + nStart, nLen, str.data(), str.length());
 961 }
 962
 963 int STRINGCLASS::compare(size_t nStart, size_t nLen,
 964                          const wxStringBase& str,
 965                          size_t nStart2, size_t nLen2) const
 966 {
 967     wxASSERT(nStart <= length());
 968     wxASSERT(nStart2 <= str.length());
 969     size_type strLen  =     length() - nStart,
 970               strLen2 = str.length() - nStart2;
 971     nLen  = strLen  < nLen  ? strLen  : nLen;
 972     nLen2 = strLen2 < nLen2 ? strLen2 : nLen2;
 973     return ::wxDoCmp(data() + nStart, nLen, str.data() + nStart2, nLen2);
 974 }
 975
 976 int STRINGCLASS::compare(const wxChar* sz) const
 977 {
 978     size_t nLen = wxStrlen(sz);
 979     return ::wxDoCmp(data(), length(), sz, nLen);
 980 }
 981
 982 int STRINGCLASS::compare(size_t nStart, size_t nLen,
 983                          const wxChar* sz, size_t nCount) const
 984 {
 985     wxASSERT(nStart <= length());
 986     size_type strLen = length() - nStart;
 987     nLen = strLen < nLen ? strLen : nLen;
 988     if( nCount == npos )
 989         nCount = wxStrlen(sz);
 990
 991     return ::wxDoCmp(data() + nStart, nLen, sz, nCount);
 992 }
 993
 994 #undef STRINGCLASS
 995
 996 #endif // !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE)
 997
 998 // ===========================================================================
 999 // wxString class core
1000 // ===========================================================================
1001
1002 // ---------------------------------------------------------------------------
1003 // construction and conversion
1004 // ---------------------------------------------------------------------------
1005
1006 #if wxUSE_UNICODE
1007
1008 // from multibyte string
1009 wxString::wxString(const char *psz, wxMBConv& conv, size_t nLength)
1010 {
1011     // if nLength != npos, then we have to make a NULL-terminated copy
1012     // of first nLength bytes of psz first because the input buffer to MB2WC
1013     // must always be NULL-terminated:
1014     wxCharBuffer inBuf((const char *)NULL);
1015     if (nLength != npos)
1016     {
1017         wxASSERT( psz != NULL );
1018         wxCharBuffer tmp(nLength);
1019         memcpy(tmp.data(), psz, nLength);
1020         tmp.data()[nLength] = '\0';
1021         inBuf = tmp;
1022         psz = inBuf.data();
1023     }
1024
1025     // first get the size of the buffer we need
1026     size_t nLen;
1027     if ( psz )
1028     {
1029         // calculate the needed size ourselves or use the provided one
1030         if (nLength == npos)
1031             nLen = strlen(psz);
1032         else
1033             nLen = nLength;
1034     }
1035     else
1036     {
1037         // nothing to convert
1038         nLen = 0;
1039     }
1040
1041
1042     // anything to do?
1043     if ( (nLen != 0) && (nLen != (size_t)-1) )
1044     {
1045         //Convert string
1046         size_t nRealSize;
1047         wxWCharBuffer theBuffer = conv.cMB2WC(psz, nLen, &nRealSize);
1048
1049         //Copy
1050         if (nRealSize)
1051             assign( theBuffer.data() , nRealSize - 1 );
1052     }
1053 }
1054
1055 //Convert wxString in Unicode mode to a multi-byte string
1056 const wxCharBuffer wxString::mb_str(wxMBConv& conv) const
1057 {
1058     size_t dwOutSize;
1059     return conv.cWC2MB(c_str(), length(), &dwOutSize);
1060 }
1061
1062 #else // ANSI
1063
1064 #if wxUSE_WCHAR_T
1065 // from wide string
1066 wxString::wxString(const wchar_t *pwz, wxMBConv& conv, size_t nLength)
1067 {
1068     // if nLength != npos, then we have to make a NULL-terminated copy
1069     // of first nLength chars of psz first because the input buffer to WC2MB
1070     // must always be NULL-terminated:
1071     wxWCharBuffer inBuf((const wchar_t *)NULL);
1072     if (nLength != npos)
1073     {
1074         wxASSERT( pwz != NULL );
1075         wxWCharBuffer tmp(nLength);
1076         memcpy(tmp.data(), pwz, nLength * sizeof(wchar_t));
1077         tmp.data()[nLength] = '\0';
1078         inBuf = tmp;
1079         pwz = inBuf.data();
1080     }
1081
1082     // first get the size of the buffer we need
1083     size_t nLen;
1084     if ( pwz )
1085     {
1086         // calculate the needed size ourselves or use the provided one
1087         if (nLength == npos)
1088             nLen = wxWcslen(pwz);
1089         else
1090             nLen = nLength;
1091     }
1092     else
1093     {
1094         // nothing to convert
1095         nLen = 0;
1096     }
1097
1098     // anything to do?
1099     if ( (nLen != 0) && (nLen != (size_t)-1) )
1100     {
1101         //Convert string
1102         size_t nRealSize;
1103         wxCharBuffer theBuffer = conv.cWC2MB(pwz, nLen, &nRealSize);
1104
1105         //Copy
1106         if (nRealSize)
1107             assign( theBuffer.data() , nRealSize - 1 );
1108     }
1109 }
1110
1111 //Converts this string to a wide character string if unicode
1112 //mode is not enabled and wxUSE_WCHAR_T is enabled
1113 const wxWCharBuffer wxString::wc_str(wxMBConv& conv) const
1114 {
1115     size_t dwOutSize;
1116     return conv.cMB2WC(c_str(), length(), &dwOutSize);
1117 }
1118
1119 #endif // wxUSE_WCHAR_T
1120
1121 #endif // Unicode/ANSI
1122
1123 // shrink to minimal size (releasing extra memory)
1124 bool wxString::Shrink()
1125 {
1126   wxString tmp(begin(), end());
1127   swap(tmp);
1128   return tmp.length() == length();
1129 }
1130
1131 #if !wxUSE_STL
1132 // get the pointer to writable buffer of (at least) nLen bytes
1133 wxChar *wxString::GetWriteBuf(size_t nLen)
1134 {
1135   if ( !AllocBeforeWrite(nLen) ) {
1136     // allocation failure handled by caller
1137     return NULL;
1138   }
1139
1140   wxASSERT( GetStringData()->nRefs == 1 );
1141   GetStringData()->Validate(false);
1142
1143   return m_pchData;
1144 }
1145
1146 // put string back in a reasonable state after GetWriteBuf
1147 void wxString::UngetWriteBuf()
1148 {
1149   GetStringData()->nDataLength = wxStrlen(m_pchData);
1150   GetStringData()->Validate(true);
1151 }
1152
1153 void wxString::UngetWriteBuf(size_t nLen)
1154 {
1155   GetStringData()->nDataLength = nLen;
1156   GetStringData()->Validate(true);
1157 }
1158 #endif
1159
1160 // ---------------------------------------------------------------------------
1161 // data access
1162 // ---------------------------------------------------------------------------
1163
1164 // all functions are inline in string.h
1165
1166 // ---------------------------------------------------------------------------
1167 // assignment operators
1168 // ---------------------------------------------------------------------------
1169
1170 #if !wxUSE_UNICODE
1171
1172 // same as 'signed char' variant
1173 wxString& wxString::operator=(const unsigned char* psz)
1174 {
1175   *this = (const char *)psz;
1176   return *this;
1177 }
1178
1179 #if wxUSE_WCHAR_T
1180 wxString& wxString::operator=(const wchar_t *pwz)
1181 {
1182   wxString str(pwz);
1183   swap(str);
1184   return *this;
1185 }
1186 #endif
1187
1188 #endif
1189
1190 /*
1191  * concatenation functions come in 5 flavours:
1192  *  string + string
1193  *  char   + string      and      string + char
1194  *  C str  + string      and      string + C str
1195  */
1196
1197 wxString operator+(const wxString& str1, const wxString& str2)
1198 {
1199 #if !wxUSE_STL
1200   wxASSERT( str1.GetStringData()->IsValid() );
1201   wxASSERT( str2.GetStringData()->IsValid() );
1202 #endif
1203
1204   wxString s = str1;
1205   s += str2;
1206
1207   return s;
1208 }
1209
1210 wxString operator+(const wxString& str, wxChar ch)
1211 {
1212 #if !wxUSE_STL
1213   wxASSERT( str.GetStringData()->IsValid() );
1214 #endif
1215
1216   wxString s = str;
1217   s += ch;
1218
1219   return s;
1220 }
1221
1222 wxString operator+(wxChar ch, const wxString& str)
1223 {
1224 #if !wxUSE_STL
1225   wxASSERT( str.GetStringData()->IsValid() );
1226 #endif
1227
1228   wxString s = ch;
1229   s += str;
1230
1231   return s;
1232 }
1233
1234 wxString operator+(const wxString& str, const wxChar *psz)
1235 {
1236 #if !wxUSE_STL
1237   wxASSERT( str.GetStringData()->IsValid() );
1238 #endif
1239
1240   wxString s;
1241   if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) {
1242     wxFAIL_MSG( _T("out of memory in wxString::operator+") );
1243   }
1244   s += str;
1245   s += psz;
1246
1247   return s;
1248 }
1249
1250 wxString operator+(const wxChar *psz, const wxString& str)
1251 {
1252 #if !wxUSE_STL
1253   wxASSERT( str.GetStringData()->IsValid() );
1254 #endif
1255
1256   wxString s;
1257   if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) {
1258     wxFAIL_MSG( _T("out of memory in wxString::operator+") );
1259   }
1260   s = psz;
1261   s += str;
1262
1263   return s;
1264 }
1265
1266 // ===========================================================================
1267 // other common string functions
1268 // ===========================================================================
1269
1270 int wxString::Cmp(const wxString& s) const
1271 {
1272     return compare(s);
1273 }
1274
1275 int wxString::Cmp(const wxChar* psz) const
1276 {
1277     return compare(psz);
1278 }
1279
1280 static inline int wxDoCmpNoCase(const wxChar* s1, size_t l1,
1281                                 const wxChar* s2, size_t l2)
1282 {
1283     size_t i;
1284
1285     if( l1 == l2 )
1286     {
1287         for(i = 0; i < l1; ++i)
1288         {
1289             if(wxTolower(s1[i]) != wxTolower(s2[i]))
1290                 break;
1291         }
1292         return i == l1 ? 0 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1;
1293     }
1294     else if( l1 < l2 )
1295     {
1296         for(i = 0; i < l1; ++i)
1297         {
1298             if(wxTolower(s1[i]) != wxTolower(s2[i]))
1299                 break;
1300         }
1301         return i == l1 ? -1 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1;
1302     }
1303     else
1304     {
1305         for(i = 0; i < l2; ++i)
1306         {
1307             if(wxTolower(s1[i]) != wxTolower(s2[i]))
1308                 break;
1309         }
1310         return i == l2 ? 1 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1;
1311     }
1312 }
1313
1314 int wxString::CmpNoCase(const wxString& s) const
1315 {
1316     return wxDoCmpNoCase(data(), length(), s.data(), s.length());
1317 }
1318
1319 int wxString::CmpNoCase(const wxChar* psz) const
1320 {
1321     int nLen = wxStrlen(psz);
1322
1323     return wxDoCmpNoCase(data(), length(), psz, nLen);
1324 }
1325
1326
1327 #if wxUSE_UNICODE
1328
1329 #ifdef __MWERKS__
1330 #ifndef __SCHAR_MAX__
1331 #define __SCHAR_MAX__ 127
1332 #endif
1333 #endif
1334
1335 wxString wxString::FromAscii(const char *ascii)
1336 {
1337     if (!ascii)
1338        return wxEmptyString;
1339
1340     size_t len = strlen( ascii );
1341     wxString res;
1342
1343     if ( len )
1344     {
1345         wxStringBuffer buf(res, len);
1346
1347         wchar_t *dest = buf;
1348
1349         for ( ;; )
1350         {
1351            if ( (*dest++ = (wchar_t)(unsigned char)*ascii++) == L'\0' )
1352                break;
1353         }
1354     }
1355
1356     return res;
1357 }
1358
1359 wxString wxString::FromAscii(const char ascii)
1360 {
1361     // What do we do with '\0' ?
1362
1363     wxString res;
1364     res += (wchar_t)(unsigned char) ascii;
1365
1366     return res;
1367 }
1368
1369 const wxCharBuffer wxString::ToAscii() const
1370 {
1371     // this will allocate enough space for the terminating NUL too
1372     wxCharBuffer buffer(length());
1373
1374
1375     char *dest = buffer.data();
1376
1377     const wchar_t *pwc = c_str();
1378     for ( ;; )
1379     {
1380         *dest++ = (char)(*pwc > SCHAR_MAX ? wxT('_') : *pwc);
1381
1382         // the output string can't have embedded NULs anyhow, so we can safely
1383         // stop at first of them even if we do have any
1384         if ( !*pwc++ )
1385             break;
1386     }
1387
1388     return buffer;
1389 }
1390
1391 #endif // Unicode
1392
1393 // extract string of length nCount starting at nFirst
1394 wxString wxString::Mid(size_t nFirst, size_t nCount) const
1395 {
1396   size_t nLen = length();
1397
1398   // default value of nCount is npos and means "till the end"
1399   if ( nCount == npos )
1400   {
1401     nCount = nLen - nFirst;
1402   }
1403
1404   // out-of-bounds requests return sensible things
1405   if ( nFirst + nCount > nLen )
1406   {
1407     nCount = nLen - nFirst;
1408   }
1409
1410   if ( nFirst > nLen )
1411   {
1412     // AllocCopy() will return empty string
1413     nCount = 0;
1414   }
1415
1416   wxString dest(*this, nFirst, nCount);
1417   if ( dest.length() != nCount ) {
1418       wxFAIL_MSG( _T("out of memory in wxString::Mid") );
1419   }
1420
1421   return dest;
1422 }
1423
1424 // check that the string starts with prefix and return the rest of the string
1425 // in the provided pointer if it is not NULL, otherwise return false
1426 bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const
1427 {
1428     wxASSERT_MSG( prefix, _T("invalid parameter in wxString::StartsWith") );
1429
1430     // first check if the beginning of the string matches the prefix: note
1431     // that we don't have to check that we don't run out of this string as
1432     // when we reach the terminating NUL, either prefix string ends too (and
1433     // then it's ok) or we break out of the loop because there is no match
1434     const wxChar *p = c_str();
1435     while ( *prefix )
1436     {
1437         if ( *prefix++ != *p++ )
1438         {
1439             // no match
1440             return false;
1441         }
1442     }
1443
1444     if ( rest )
1445     {
1446         // put the rest of the string into provided pointer
1447         *rest = p;
1448     }
1449
1450     return true;
1451 }
1452
1453 // extract nCount last (rightmost) characters
1454 wxString wxString::Right(size_t nCount) const
1455 {
1456   if ( nCount > length() )
1457     nCount = length();
1458
1459   wxString dest(*this, length() - nCount, nCount);
1460   if ( dest.length() != nCount ) {
1461     wxFAIL_MSG( _T("out of memory in wxString::Right") );
1462   }
1463   return dest;
1464 }
1465
1466 // get all characters after the last occurence of ch
1467 // (returns the whole string if ch not found)
1468 wxString wxString::AfterLast(wxChar ch) const
1469 {
1470   wxString str;
1471   int iPos = Find(ch, true);
1472   if ( iPos == wxNOT_FOUND )
1473     str = *this;
1474   else
1475     str = c_str() + iPos + 1;
1476
1477   return str;
1478 }
1479
1480 // extract nCount first (leftmost) characters
1481 wxString wxString::Left(size_t nCount) const
1482 {
1483   if ( nCount > length() )
1484     nCount = length();
1485
1486   wxString dest(*this, 0, nCount);
1487   if ( dest.length() != nCount ) {
1488     wxFAIL_MSG( _T("out of memory in wxString::Left") );
1489   }
1490   return dest;
1491 }
1492
1493 // get all characters before the first occurence of ch
1494 // (returns the whole string if ch not found)
1495 wxString wxString::BeforeFirst(wxChar ch) const
1496 {
1497   int iPos = Find(ch);
1498   if ( iPos == wxNOT_FOUND ) iPos = length();
1499   return wxString(*this, 0, iPos);
1500 }
1501
1502 /// get all characters before the last occurence of ch
1503 /// (returns empty string if ch not found)
1504 wxString wxString::BeforeLast(wxChar ch) const
1505 {
1506   wxString str;
1507   int iPos = Find(ch, true);
1508   if ( iPos != wxNOT_FOUND && iPos != 0 )
1509     str = wxString(c_str(), iPos);
1510
1511   return str;
1512 }
1513
1514 /// get all characters after the first occurence of ch
1515 /// (returns empty string if ch not found)
1516 wxString wxString::AfterFirst(wxChar ch) const
1517 {
1518   wxString str;
1519   int iPos = Find(ch);
1520   if ( iPos != wxNOT_FOUND )
1521     str = c_str() + iPos + 1;
1522
1523   return str;
1524 }
1525
1526 // replace first (or all) occurences of some substring with another one
1527 size_t wxString::Replace(const wxChar *szOld,
1528                   const wxChar *szNew, bool bReplaceAll)
1529 {
1530     // if we tried to replace an empty string we'd enter an infinite loop below
1531     wxCHECK_MSG( szOld && *szOld && szNew, 0,
1532                  _T("wxString::Replace(): invalid parameter") );
1533
1534     size_t uiCount = 0;   // count of replacements made
1535
1536     size_t uiOldLen = wxStrlen(szOld);
1537     size_t uiNewLen = wxStrlen(szNew);
1538
1539     size_t dwPos = 0;
1540
1541     while ( this->c_str()[dwPos] != wxT('\0') )
1542     {
1543         //DO NOT USE STRSTR HERE
1544         //this string can contain embedded null characters,
1545         //so strstr will function incorrectly
1546         dwPos = find(szOld, dwPos);
1547         if ( dwPos == npos )
1548             break;                  // exit the loop
1549         else
1550         {
1551             //replace this occurance of the old string with the new one
1552             replace(dwPos, uiOldLen, szNew, uiNewLen);
1553
1554             //move up pos past the string that was replaced
1555             dwPos += uiNewLen;
1556
1557             //increase replace count
1558             ++uiCount;
1559
1560             // stop now?
1561             if ( !bReplaceAll )
1562                 break;                  // exit the loop
1563         }
1564     }
1565
1566     return uiCount;
1567 }
1568
1569 bool wxString::IsAscii() const
1570 {
1571   const wxChar *s = (const wxChar*) *this;
1572   while(*s){
1573     if(!isascii(*s)) return(false);
1574     s++;
1575   }
1576   return(true);
1577 }
1578
1579 bool wxString::IsWord() const
1580 {
1581   const wxChar *s = (const wxChar*) *this;
1582   while(*s){
1583     if(!wxIsalpha(*s)) return(false);
1584     s++;
1585   }
1586   return(true);
1587 }
1588
1589 bool wxString::IsNumber() const
1590 {
1591   const wxChar *s = (const wxChar*) *this;
1592   if (wxStrlen(s))
1593      if ((s[0] == wxT('-')) || (s[0] == wxT('+'))) s++;
1594   while(*s){
1595     if(!wxIsdigit(*s)) return(false);
1596     s++;
1597   }
1598   return(true);
1599 }
1600
1601 wxString wxString::Strip(stripType w) const
1602 {
1603     wxString s = *this;
1604     if ( w & leading ) s.Trim(false);
1605     if ( w & trailing ) s.Trim(true);
1606     return s;
1607 }
1608
1609 // ---------------------------------------------------------------------------
1610 // case conversion
1611 // ---------------------------------------------------------------------------
1612
1613 wxString& wxString::MakeUpper()
1614 {
1615   for ( iterator it = begin(), en = end(); it != en; ++it )
1616     *it = (wxChar)wxToupper(*it);
1617
1618   return *this;
1619 }
1620
1621 wxString& wxString::MakeLower()
1622 {
1623   for ( iterator it = begin(), en = end(); it != en; ++it )
1624     *it = (wxChar)wxTolower(*it);
1625
1626   return *this;
1627 }
1628
1629 // ---------------------------------------------------------------------------
1630 // trimming and padding
1631 // ---------------------------------------------------------------------------
1632
1633 // some compilers (VC++ 6.0 not to name them) return true for a call to
1634 // isspace('ê') in the C locale which seems to be broken to me, but we have to
1635 // live with this by checking that the character is a 7 bit one - even if this
1636 // may fail to detect some spaces (I don't know if Unicode doesn't have
1637 // space-like symbols somewhere except in the first 128 chars), it is arguably
1638 // still better than trimming away accented letters
1639 inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); }
1640
1641 // trims spaces (in the sense of isspace) from left or right side
1642 wxString& wxString::Trim(bool bFromRight)
1643 {
1644   // first check if we're going to modify the string at all
1645   if ( !empty() &&
1646        (
1647         (bFromRight && wxSafeIsspace(GetChar(Len() - 1))) ||
1648         (!bFromRight && wxSafeIsspace(GetChar(0u)))
1649        )
1650      )
1651   {
1652     if ( bFromRight )
1653     {
1654       // find last non-space character
1655       iterator psz = begin() + length() - 1;
1656       while ( wxSafeIsspace(*psz) && (psz >= begin()) )
1657         psz--;
1658
1659       // truncate at trailing space start
1660       *++psz = wxT('\0');
1661       erase(psz, end());
1662     }
1663     else
1664     {
1665       // find first non-space character
1666       iterator psz = begin();
1667       while ( wxSafeIsspace(*psz) )
1668         psz++;
1669
1670       // fix up data and length
1671       erase(begin(), psz);
1672     }
1673   }
1674
1675   return *this;
1676 }
1677
1678 // adds nCount characters chPad to the string from either side
1679 wxString& wxString::Pad(size_t nCount, wxChar chPad, bool bFromRight)
1680 {
1681   wxString s(chPad, nCount);
1682
1683   if ( bFromRight )
1684     *this += s;
1685   else
1686   {
1687     s += *this;
1688     swap(s);
1689   }
1690
1691   return *this;
1692 }
1693
1694 // truncate the string
1695 wxString& wxString::Truncate(size_t uiLen)
1696 {
1697   if ( uiLen < Len() ) {
1698     erase(begin() + uiLen, end());
1699   }
1700   //else: nothing to do, string is already short enough
1701
1702   return *this;
1703 }
1704
1705 // ---------------------------------------------------------------------------
1706 // finding (return wxNOT_FOUND if not found and index otherwise)
1707 // ---------------------------------------------------------------------------
1708
1709 // find a character
1710 int wxString::Find(wxChar ch, bool bFromEnd) const
1711 {
1712   size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch);
1713
1714   return (idx == npos) ? wxNOT_FOUND : (int)idx;
1715 }
1716
1717 // find a sub-string (like strstr)
1718 int wxString::Find(const wxChar *pszSub) const
1719 {
1720   size_type idx = find(pszSub);
1721
1722   return (idx == npos) ? wxNOT_FOUND : (int)idx;
1723 }
1724
1725 // ----------------------------------------------------------------------------
1726 // conversion to numbers
1727 // ----------------------------------------------------------------------------
1728
1729 bool wxString::ToLong(long *val, int base) const
1730 {
1731     wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToLong") );
1732     wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
1733
1734     const wxChar *start = c_str();
1735     wxChar *end;
1736     *val = wxStrtol(start, &end, base);
1737
1738     // return true only if scan was stopped by the terminating NUL and if the
1739     // string was not empty to start with
1740     return !*end && (end != start);
1741 }
1742
1743 bool wxString::ToULong(unsigned long *val, int base) const
1744 {
1745     wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToULong") );
1746     wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
1747
1748     const wxChar *start = c_str();
1749     wxChar *end;
1750     *val = wxStrtoul(start, &end, base);
1751
1752     // return true only if scan was stopped by the terminating NUL and if the
1753     // string was not empty to start with
1754     return !*end && (end != start);
1755 }
1756
1757 bool wxString::ToDouble(double *val) const
1758 {
1759     wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") );
1760
1761     const wxChar *start = c_str();
1762     wxChar *end;
1763     *val = wxStrtod(start, &end);
1764
1765     // return true only if scan was stopped by the terminating NUL and if the
1766     // string was not empty to start with
1767     return !*end && (end != start);
1768 }
1769
1770 // ---------------------------------------------------------------------------
1771 // formatted output
1772 // ---------------------------------------------------------------------------
1773
1774 /* static */
1775 wxString wxString::Format(const wxChar *pszFormat, ...)
1776 {
1777     va_list argptr;
1778     va_start(argptr, pszFormat);
1779
1780     wxString s;
1781     s.PrintfV(pszFormat, argptr);
1782
1783     va_end(argptr);
1784
1785     return s;
1786 }
1787
1788 /* static */
1789 wxString wxString::FormatV(const wxChar *pszFormat, va_list argptr)
1790 {
1791     wxString s;
1792     s.PrintfV(pszFormat, argptr);
1793     return s;
1794 }
1795
1796 int wxString::Printf(const wxChar *pszFormat, ...)
1797 {
1798     va_list argptr;
1799     va_start(argptr, pszFormat);
1800
1801     int iLen = PrintfV(pszFormat, argptr);
1802
1803     va_end(argptr);
1804
1805     return iLen;
1806 }
1807
1808 int wxString::PrintfV(const wxChar* pszFormat, va_list argptr)
1809 {
1810     int size = 1024;
1811
1812     for ( ;; )
1813     {
1814         wxStringBuffer tmp(*this, size + 1);
1815         wxChar* buf = tmp;
1816
1817         if ( !buf )
1818         {
1819             // out of memory
1820             return -1;
1821         }
1822
1823         // wxVsnprintf() may modify the original arg pointer, so pass it
1824         // only a copy
1825         va_list argptrcopy;
1826         wxVaCopy(argptrcopy, argptr);
1827         int len = wxVsnprintf(buf, size, pszFormat, argptrcopy);
1828         va_end(argptrcopy);
1829
1830         // some implementations of vsnprintf() don't NUL terminate
1831         // the string if there is not enough space for it so
1832         // always do it manually
1833         buf[size] = _T('\0');
1834
1835         // vsnprintf() may return either -1 (traditional Unix behaviour) or the
1836         // total number of characters which would have been written if the
1837         // buffer were large enough
1838         // also, it may return an errno may be something like EILSEQ,
1839         // in which case we need to break out
1840         if ( (len >= 0 && len <= size)
1841         // No EOVERFLOW on Windows nor Palm 6.0 nor OpenVMS nor MacOS (not X)
1842         // not OS/2 (not Innotek libc).
1843 #if !defined(__WXMSW__) && !defined(__WXPALMOS__) && !defined( __VMS ) && !(defined(__WXMAC__) && !defined(__WXMAC_OSX__)) && !(defined(__EMX__) && !defined(__INNOTEK_LIBC__))
1844             || errno != EOVERFLOW
1845 #endif
1846             )
1847         {
1848             // ok, there was enough space
1849             break;
1850         }
1851
1852         // still not enough, double it again
1853         size *= 2;
1854     }
1855
1856     // we could have overshot
1857     Shrink();
1858
1859     return Len();
1860 }
1861
1862 // ----------------------------------------------------------------------------
1863 // misc other operations
1864 // ----------------------------------------------------------------------------
1865
1866 // returns true if the string matches the pattern which may contain '*' and
1867 // '?' metacharacters (as usual, '?' matches any character and '*' any number
1868 // of them)
1869 bool wxString::Matches(const wxChar *pszMask) const
1870 {
1871     // I disable this code as it doesn't seem to be faster (in fact, it seems
1872     // to be much slower) than the old, hand-written code below and using it
1873     // here requires always linking with libregex even if the user code doesn't
1874     // use it
1875 #if 0 // wxUSE_REGEX
1876     // first translate the shell-like mask into a regex
1877     wxString pattern;
1878     pattern.reserve(wxStrlen(pszMask));
1879
1880     pattern += _T('^');
1881     while ( *pszMask )
1882     {
1883         switch ( *pszMask )
1884         {
1885             case _T('?'):
1886                 pattern += _T('.');
1887                 break;
1888
1889             case _T('*'):
1890                 pattern += _T(".*");
1891                 break;
1892
1893             case _T('^'):
1894             case _T('.'):
1895             case _T('$'):
1896             case _T('('):
1897             case _T(')'):
1898             case _T('|'):
1899             case _T('+'):
1900             case _T('\\'):
1901                 // these characters are special in a RE, quote them
1902                 // (however note that we don't quote '[' and ']' to allow
1903                 // using them for Unix shell like matching)
1904                 pattern += _T('\\');
1905                 // fall through
1906
1907             default:
1908                 pattern += *pszMask;
1909         }
1910
1911         pszMask++;
1912     }
1913     pattern += _T('$');
1914
1915     // and now use it
1916     return wxRegEx(pattern, wxRE_NOSUB | wxRE_EXTENDED).Matches(c_str());
1917 #else // !wxUSE_REGEX
1918   // TODO: this is, of course, awfully inefficient...
1919
1920   // the char currently being checked
1921   const wxChar *pszTxt = c_str();
1922
1923   // the last location where '*' matched
1924   const wxChar *pszLastStarInText = NULL;
1925   const wxChar *pszLastStarInMask = NULL;
1926
1927 match:
1928   for ( ; *pszMask != wxT('\0'); pszMask++, pszTxt++ ) {
1929     switch ( *pszMask ) {
1930       case wxT('?'):
1931         if ( *pszTxt == wxT('\0') )
1932           return false;
1933
1934         // pszTxt and pszMask will be incremented in the loop statement
1935
1936         break;
1937
1938       case wxT('*'):
1939         {
1940           // remember where we started to be able to backtrack later
1941           pszLastStarInText = pszTxt;
1942           pszLastStarInMask = pszMask;
1943
1944           // ignore special chars immediately following this one
1945           // (should this be an error?)
1946           while ( *pszMask == wxT('*') || *pszMask == wxT('?') )
1947             pszMask++;
1948
1949           // if there is nothing more, match
1950           if ( *pszMask == wxT('\0') )
1951             return true;
1952
1953           // are there any other metacharacters in the mask?
1954           size_t uiLenMask;
1955           const wxChar *pEndMask = wxStrpbrk(pszMask, wxT("*?"));
1956
1957           if ( pEndMask != NULL ) {
1958             // we have to match the string between two metachars
1959             uiLenMask = pEndMask - pszMask;
1960           }
1961           else {
1962             // we have to match the remainder of the string
1963             uiLenMask = wxStrlen(pszMask);
1964           }
1965
1966           wxString strToMatch(pszMask, uiLenMask);
1967           const wxChar* pMatch = wxStrstr(pszTxt, strToMatch);
1968           if ( pMatch == NULL )
1969             return false;
1970
1971           // -1 to compensate "++" in the loop
1972           pszTxt = pMatch + uiLenMask - 1;
1973           pszMask += uiLenMask - 1;
1974         }
1975         break;
1976
1977       default:
1978         if ( *pszMask != *pszTxt )
1979           return false;
1980         break;
1981     }
1982   }
1983
1984   // match only if nothing left
1985   if ( *pszTxt == wxT('\0') )
1986     return true;
1987
1988   // if we failed to match, backtrack if we can
1989   if ( pszLastStarInText ) {
1990     pszTxt = pszLastStarInText + 1;
1991     pszMask = pszLastStarInMask;
1992
1993     pszLastStarInText = NULL;
1994
1995     // don't bother resetting pszLastStarInMask, it's unnecessary
1996
1997     goto match;
1998   }
1999
2000   return false;
2001 #endif // wxUSE_REGEX/!wxUSE_REGEX
2002 }
2003
2004 // Count the number of chars
2005 int wxString::Freq(wxChar ch) const
2006 {
2007     int count = 0;
2008     int len = Len();
2009     for (int i = 0; i < len; i++)
2010     {
2011         if (GetChar(i) == ch)
2012             count ++;
2013     }
2014     return count;
2015 }
2016
2017 // convert to upper case, return the copy of the string
2018 wxString wxString::Upper() const
2019 { wxString s(*this); return s.MakeUpper(); }
2020
2021 // convert to lower case, return the copy of the string
2022 wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
2023
2024 int wxString::sprintf(const wxChar *pszFormat, ...)
2025   {
2026     va_list argptr;
2027     va_start(argptr, pszFormat);
2028     int iLen = PrintfV(pszFormat, argptr);
2029     va_end(argptr);
2030     return iLen;
2031   }
2032
2033 // ============================================================================
2034 // ArrayString
2035 // ============================================================================
2036
2037 #include "wx/arrstr.h"
2038
2039 wxArrayString::wxArrayString(size_t sz, const wxChar** a)
2040 {
2041 #if !wxUSE_STL
2042     Init(false);
2043 #endif
2044     for (size_t i=0; i < sz; i++)
2045         Add(a[i]);
2046 }
2047
2048 wxArrayString::wxArrayString(size_t sz, const wxString* a)
2049 {
2050 #if !wxUSE_STL
2051     Init(false);
2052 #endif
2053     for (size_t i=0; i < sz; i++)
2054         Add(a[i]);
2055 }
2056
2057 #if !wxUSE_STL
2058
2059 // size increment = min(50% of current size, ARRAY_MAXSIZE_INCREMENT)
2060 #define   ARRAY_MAXSIZE_INCREMENT       4096
2061
2062 #ifndef   ARRAY_DEFAULT_INITIAL_SIZE    // also defined in dynarray.h
2063 #define   ARRAY_DEFAULT_INITIAL_SIZE    (16)
2064 #endif
2065
2066 #define   STRING(p)   ((wxString *)(&(p)))
2067
2068 // ctor
2069 void wxArrayString::Init(bool autoSort)
2070 {
2071   m_nSize  =
2072   m_nCount = 0;
2073   m_pItems = (wxChar **) NULL;
2074   m_autoSort = autoSort;
2075 }
2076
2077 // copy ctor
2078 wxArrayString::wxArrayString(const wxArrayString& src)
2079 {
2080   Init(src.m_autoSort);
2081
2082   *this = src;
2083 }
2084
2085 // assignment operator
2086 wxArrayString& wxArrayString::operator=(const wxArrayString& src)
2087 {
2088   if ( m_nSize > 0 )
2089     Clear();
2090
2091   Copy(src);
2092
2093   m_autoSort = src.m_autoSort;
2094
2095   return *this;
2096 }
2097
2098 void wxArrayString::Copy(const wxArrayString& src)
2099 {
2100   if ( src.m_nCount > ARRAY_DEFAULT_INITIAL_SIZE )
2101     Alloc(src.m_nCount);
2102
2103   for ( size_t n = 0; n < src.m_nCount; n++ )
2104     Add(src[n]);
2105 }
2106
2107 // grow the array
2108 void wxArrayString::Grow(size_t nIncrement)
2109 {
2110   // only do it if no more place
2111   if ( (m_nSize - m_nCount) < nIncrement ) {
2112     // if ARRAY_DEFAULT_INITIAL_SIZE were set to 0, the initially empty would
2113     // be never resized!
2114     #if ARRAY_DEFAULT_INITIAL_SIZE == 0
2115       #error "ARRAY_DEFAULT_INITIAL_SIZE must be > 0!"
2116     #endif
2117
2118     if ( m_nSize == 0 ) {
2119       // was empty, alloc some memory
2120       m_nSize = ARRAY_DEFAULT_INITIAL_SIZE;
2121       if (m_nSize < nIncrement)
2122           m_nSize = nIncrement;
2123       m_pItems = new wxChar *[m_nSize];
2124     }
2125     else {
2126       // otherwise when it's called for the first time, nIncrement would be 0
2127       // and the array would never be expanded
2128       // add 50% but not too much
2129       size_t ndefIncrement = m_nSize < ARRAY_DEFAULT_INITIAL_SIZE
2130                           ? ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1;
2131       if ( ndefIncrement > ARRAY_MAXSIZE_INCREMENT )
2132         ndefIncrement = ARRAY_MAXSIZE_INCREMENT;
2133       if ( nIncrement < ndefIncrement )
2134         nIncrement = ndefIncrement;
2135       m_nSize += nIncrement;
2136       wxChar **pNew = new wxChar *[m_nSize];
2137
2138       // copy data to new location
2139       memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *));
2140
2141       // delete old memory (but do not release the strings!)
2142       wxDELETEA(m_pItems);
2143
2144       m_pItems = pNew;
2145     }
2146   }
2147 }
2148
2149 void wxArrayString::Free()
2150 {
2151   for ( size_t n = 0; n < m_nCount; n++ ) {
2152     STRING(m_pItems[n])->GetStringData()->Unlock();
2153   }
2154 }
2155
2156 // deletes all the strings from the list
2157 void wxArrayString::Empty()
2158 {
2159   Free();
2160
2161   m_nCount = 0;
2162 }
2163
2164 // as Empty, but also frees memory
2165 void wxArrayString::Clear()
2166 {
2167   Free();
2168
2169   m_nSize  =
2170   m_nCount = 0;
2171
2172   wxDELETEA(m_pItems);
2173 }
2174
2175 // dtor
2176 wxArrayString::~wxArrayString()
2177 {
2178   Free();
2179
2180   wxDELETEA(m_pItems);
2181 }
2182
2183 void wxArrayString::reserve(size_t nSize)
2184 {
2185     Alloc(nSize);
2186 }
2187
2188 // pre-allocates memory (frees the previous data!)
2189 void wxArrayString::Alloc(size_t nSize)
2190 {
2191   // only if old buffer was not big enough
2192   if ( nSize > m_nSize ) {
2193     Free();
2194     wxDELETEA(m_pItems);
2195     m_pItems = new wxChar *[nSize];
2196     m_nSize  = nSize;
2197   }
2198
2199   m_nCount = 0;
2200 }
2201
2202 // minimizes the memory usage by freeing unused memory
2203 void wxArrayString::Shrink()
2204 {
2205   // only do it if we have some memory to free
2206   if( m_nCount < m_nSize ) {
2207     // allocates exactly as much memory as we need
2208     wxChar **pNew = new wxChar *[m_nCount];
2209
2210     // copy data to new location
2211     memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *));
2212     delete [] m_pItems;
2213     m_pItems = pNew;
2214   }
2215 }
2216
2217 #if WXWIN_COMPATIBILITY_2_4
2218
2219 // return a wxString[] as required for some control ctors.
2220 wxString* wxArrayString::GetStringArray() const
2221 {
2222     wxString *array = 0;
2223
2224     if( m_nCount > 0 )
2225     {
2226         array = new wxString[m_nCount];
2227         for( size_t i = 0; i < m_nCount; i++ )
2228             array[i] = m_pItems[i];
2229     }
2230
2231     return array;
2232 }
2233
2234 void wxArrayString::Remove(size_t nIndex, size_t nRemove)
2235 {
2236     RemoveAt(nIndex, nRemove);
2237 }
2238
2239 #endif // WXWIN_COMPATIBILITY_2_4
2240
2241 // searches the array for an item (forward or backwards)
2242 int wxArrayString::Index(const wxChar *sz, bool bCase, bool bFromEnd) const
2243 {
2244   if ( m_autoSort ) {
2245     // use binary search in the sorted array
2246     wxASSERT_MSG( bCase && !bFromEnd,
2247                   wxT("search parameters ignored for auto sorted array") );
2248
2249     size_t i,
2250            lo = 0,
2251            hi = m_nCount;
2252     int res;
2253     while ( lo < hi ) {
2254       i = (lo + hi)/2;
2255
2256       res = wxStrcmp(sz, m_pItems[i]);
2257       if ( res < 0 )
2258         hi = i;
2259       else if ( res > 0 )
2260         lo = i + 1;
2261       else
2262         return i;
2263     }
2264
2265     return wxNOT_FOUND;
2266   }
2267   else {
2268     // use linear search in unsorted array
2269     if ( bFromEnd ) {
2270       if ( m_nCount > 0 ) {
2271         size_t ui = m_nCount;
2272         do {
2273           if ( STRING(m_pItems[--ui])->IsSameAs(sz, bCase) )
2274             return ui;
2275         }
2276         while ( ui != 0 );
2277       }
2278     }
2279     else {
2280       for( size_t ui = 0; ui < m_nCount; ui++ ) {
2281         if( STRING(m_pItems[ui])->IsSameAs(sz, bCase) )
2282           return ui;
2283       }
2284     }
2285   }
2286
2287   return wxNOT_FOUND;
2288 }
2289
2290 // add item at the end
2291 size_t wxArrayString::Add(const wxString& str, size_t nInsert)
2292 {
2293   if ( m_autoSort ) {
2294     // insert the string at the correct position to keep the array sorted
2295     size_t i,
2296            lo = 0,
2297            hi = m_nCount;
2298     int res;
2299     while ( lo < hi ) {
2300       i = (lo + hi)/2;
2301
2302       res = str.Cmp(m_pItems[i]);
2303       if ( res < 0 )
2304         hi = i;
2305       else if ( res > 0 )
2306         lo = i + 1;
2307       else {
2308         lo = hi = i;
2309         break;
2310       }
2311     }
2312
2313     wxASSERT_MSG( lo == hi, wxT("binary search broken") );
2314
2315     Insert(str, lo, nInsert);
2316
2317     return (size_t)lo;
2318   }
2319   else {
2320     wxASSERT( str.GetStringData()->IsValid() );
2321
2322     Grow(nInsert);
2323
2324     for (size_t i = 0; i < nInsert; i++)
2325     {
2326         // the string data must not be deleted!
2327         str.GetStringData()->Lock();
2328
2329         // just append
2330         m_pItems[m_nCount + i] = (wxChar *)str.c_str(); // const_cast
2331     }
2332     size_t ret = m_nCount;
2333     m_nCount += nInsert;
2334     return ret;
2335   }
2336 }
2337
2338 // add item at the given position
2339 void wxArrayString::Insert(const wxString& str, size_t nIndex, size_t nInsert)
2340 {
2341   wxASSERT( str.GetStringData()->IsValid() );
2342
2343   wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArrayString::Insert") );
2344   wxCHECK_RET( m_nCount <= m_nCount + nInsert,
2345                wxT("array size overflow in wxArrayString::Insert") );
2346
2347   Grow(nInsert);
2348
2349   memmove(&m_pItems[nIndex + nInsert], &m_pItems[nIndex],
2350           (m_nCount - nIndex)*sizeof(wxChar *));
2351
2352   for (size_t i = 0; i < nInsert; i++)
2353   {
2354       str.GetStringData()->Lock();
2355       m_pItems[nIndex + i] = (wxChar *)str.c_str();
2356   }
2357   m_nCount += nInsert;
2358 }
2359
2360 // range insert (STL 23.2.4.3)
2361 void
2362 wxArrayString::insert(iterator it, const_iterator first, const_iterator last)
2363 {
2364     const int idx = it - begin();
2365
2366     // grow it once
2367     Grow(last - first);
2368
2369     // reset "it" since it can change inside Grow()
2370     it = begin() + idx;
2371
2372     while ( first != last )
2373     {
2374         it = insert(it, *first);
2375
2376         // insert returns an iterator to the last element inserted but we need
2377         // insert the next after this one, that is before the next one
2378         ++it;
2379
2380         ++first;
2381     }
2382 }
2383
2384 // expand the array
2385 void wxArrayString::SetCount(size_t count)
2386 {
2387     Alloc(count);
2388
2389     wxString s;
2390     while ( m_nCount < count )
2391         m_pItems[m_nCount++] = (wxChar *)s.c_str();
2392 }
2393
2394 // removes item from array (by index)
2395 void wxArrayString::RemoveAt(size_t nIndex, size_t nRemove)
2396 {
2397   wxCHECK_RET( nIndex < m_nCount, wxT("bad index in wxArrayString::Remove") );
2398   wxCHECK_RET( nIndex + nRemove <= m_nCount,
2399                wxT("removing too many elements in wxArrayString::Remove") );
2400
2401   // release our lock
2402   for (size_t i = 0; i < nRemove; i++)
2403       Item(nIndex + i).GetStringData()->Unlock();
2404
2405   memmove(&m_pItems[nIndex], &m_pItems[nIndex + nRemove],
2406           (m_nCount - nIndex - nRemove)*sizeof(wxChar *));
2407   m_nCount -= nRemove;
2408 }
2409
2410 // removes item from array (by value)
2411 void wxArrayString::Remove(const wxChar *sz)
2412 {
2413   int iIndex = Index(sz);
2414
2415   wxCHECK_RET( iIndex != wxNOT_FOUND,
2416                wxT("removing inexistent element in wxArrayString::Remove") );
2417
2418   RemoveAt(iIndex);
2419 }
2420
2421 void wxArrayString::assign(const_iterator first, const_iterator last)
2422 {
2423     reserve(last - first);
2424     for(; first != last; ++first)
2425         push_back(*first);
2426 }
2427
2428 // ----------------------------------------------------------------------------
2429 // sorting
2430 // ----------------------------------------------------------------------------
2431
2432 // we can only sort one array at a time with the quick-sort based
2433 // implementation
2434 #if wxUSE_THREADS
2435   // need a critical section to protect access to gs_compareFunction and
2436   // gs_sortAscending variables
2437   static wxCriticalSection *gs_critsectStringSort = NULL;
2438
2439   // call this before the value of the global sort vars is changed/after
2440   // you're finished with them
2441   #define START_SORT()     wxASSERT( !gs_critsectStringSort );                \
2442                            gs_critsectStringSort = new wxCriticalSection;     \
2443                            gs_critsectStringSort->Enter()
2444   #define END_SORT()       gs_critsectStringSort->Leave();                    \
2445                            delete gs_critsectStringSort;                      \
2446                            gs_critsectStringSort = NULL
2447 #else // !threads
2448   #define START_SORT()
2449   #define END_SORT()
2450 #endif // wxUSE_THREADS
2451
2452 // function to use for string comparaison
2453 static wxArrayString::CompareFunction gs_compareFunction = NULL;
2454
2455 // if we don't use the compare function, this flag tells us if we sort the
2456 // array in ascending or descending order
2457 static bool gs_sortAscending = true;
2458
2459 // function which is called by quick sort
2460 extern "C" int wxC_CALLING_CONV     // LINKAGEMODE
2461 wxStringCompareFunction(const void *first, const void *second)
2462 {
2463   wxString *strFirst = (wxString *)first;
2464   wxString *strSecond = (wxString *)second;
2465
2466   if ( gs_compareFunction ) {
2467     return gs_compareFunction(*strFirst, *strSecond);
2468   }
2469   else {
2470     // maybe we should use wxStrcoll
2471     int result = strFirst->Cmp(*strSecond);
2472
2473     return gs_sortAscending ? result : -result;
2474   }
2475 }
2476
2477 // sort array elements using passed comparaison function
2478 void wxArrayString::Sort(CompareFunction compareFunction)
2479 {
2480   START_SORT();
2481
2482   wxASSERT( !gs_compareFunction );  // must have been reset to NULL
2483   gs_compareFunction = compareFunction;
2484
2485   DoSort();
2486
2487   // reset it to NULL so that Sort(bool) will work the next time
2488   gs_compareFunction = NULL;
2489
2490   END_SORT();
2491 }
2492
2493 typedef  int (wxC_CALLING_CONV * wxStringCompareFn)(const void *first, const void *second);
2494
2495 void wxArrayString::Sort(CompareFunction2 compareFunction)
2496 {
2497   qsort(m_pItems, m_nCount, sizeof(wxChar *), (wxStringCompareFn)compareFunction);
2498 }
2499
2500 void wxArrayString::Sort(bool reverseOrder)
2501 {
2502   Sort(reverseOrder ? wxStringSortDescending : wxStringSortAscending);
2503 }
2504
2505 void wxArrayString::DoSort()
2506 {
2507   wxCHECK_RET( !m_autoSort, wxT("can't use this method with sorted arrays") );
2508
2509   // just sort the pointers using qsort() - of course it only works because
2510   // wxString() *is* a pointer to its data
2511   qsort(m_pItems, m_nCount, sizeof(wxChar *), wxStringCompareFunction);
2512 }
2513
2514 bool wxArrayString::operator==(const wxArrayString& a) const
2515 {
2516     if ( m_nCount != a.m_nCount )
2517         return false;
2518
2519     for ( size_t n = 0; n < m_nCount; n++ )
2520     {
2521         if ( Item(n) != a[n] )
2522             return false;
2523     }
2524
2525     return true;
2526 }
2527
2528 #endif // !wxUSE_STL
2529
2530 int wxCMPFUNC_CONV wxStringSortAscending(wxString* s1, wxString* s2)
2531 {
2532     return  s1->Cmp(*s2);
2533 }
2534
2535 int wxCMPFUNC_CONV wxStringSortDescending(wxString* s1, wxString* s2)
2536 {
2537     return -s1->Cmp(*s2);
2538 }