src/common/string.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        string.cpp
   3 // Purpose:     wxString class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13   #pragma implementation "string.h"
  14 #endif
  15
  16 /*
  17  * About ref counting:
  18  *  1) all empty strings use g_strEmpty, nRefs = -1 (set in Init())
  19  *  2) AllocBuffer() sets nRefs to 1, Lock() increments it by one
  20  *  3) Unlock() decrements nRefs and frees memory if it goes to 0
  21  */
  22
  23 // ===========================================================================
  24 // headers, declarations, constants
  25 // ===========================================================================
  26
  27 // For compilers that support precompilation, includes "wx.h".
  28 #include "wx/wxprec.h"
  29
  30 #ifdef __BORLANDC__
  31   #pragma hdrstop
  32 #endif
  33
  34 #ifndef WX_PRECOMP
  35   #include "wx/defs.h"
  36   #include "wx/string.h"
  37   #include "wx/intl.h"
  38 #if wxUSE_THREADS
  39   #include <wx/thread.h>
  40 #endif
  41 #endif
  42
  43 #include <ctype.h>
  44 #include <string.h>
  45 #include <stdlib.h>
  46
  47 #ifdef __SALFORDC__
  48   #include <clib.h>
  49 #endif
  50
  51 #if wxUSE_WCSRTOMBS
  52   #include <wchar.h>    // for wcsrtombs(), see comments where it's used
  53 #endif // GNU
  54
  55 #ifdef  WXSTRING_IS_WXOBJECT
  56   IMPLEMENT_DYNAMIC_CLASS(wxString, wxObject)
  57 #endif  //WXSTRING_IS_WXOBJECT
  58
  59 // allocating extra space for each string consumes more memory but speeds up
  60 // the concatenation operations (nLen is the current string's length)
  61 // NB: EXTRA_ALLOC must be >= 0!
  62 #define EXTRA_ALLOC       (19 - nLen % 16)
  63
  64 // ---------------------------------------------------------------------------
  65 // static class variables definition
  66 // ---------------------------------------------------------------------------
  67
  68 #ifdef  wxSTD_STRING_COMPATIBILITY
  69   const size_t wxString::npos = wxSTRING_MAXLEN;
  70 #endif // wxSTD_STRING_COMPATIBILITY
  71
  72 // ----------------------------------------------------------------------------
  73 // static data
  74 // ----------------------------------------------------------------------------
  75
  76 // for an empty string, GetStringData() will return this address: this
  77 // structure has the same layout as wxStringData and it's data() method will
  78 // return the empty string (dummy pointer)
  79 static const struct
  80 {
  81   wxStringData data;
  82   wxChar dummy;
  83 } g_strEmpty = { {-1, 0, 0}, _T('\0') };
  84
  85 // empty C style string: points to 'string data' byte of g_strEmpty
  86 extern const wxChar WXDLLEXPORT *g_szNul = &g_strEmpty.dummy;
  87
  88 // ----------------------------------------------------------------------------
  89 // conditional compilation
  90 // ----------------------------------------------------------------------------
  91
  92 // we want to find out if the current platform supports vsnprintf()-like
  93 // function: for Unix this is done with configure, for Windows we test the
  94 // compiler explicitly.
  95 #ifdef __WXMSW__
  96     #ifdef __VISUALC__
  97         #define wxVsnprintf     _vsnprintf
  98     #endif
  99 #else   // !Windows
 100     #ifdef HAVE_VSNPRINTF
 101         #define wxVsnprintf       vsnprintf
 102     #endif
 103 #endif  // Windows/!Windows
 104
 105 #ifndef wxVsnprintf
 106     // in this case we'll use vsprintf() (which is ANSI and thus should be
 107     // always available), but it's unsafe because it doesn't check for buffer
 108     // size - so give a warning
 109     #define wxVsnprintf(buffer,len,format,argptr) vsprintf(buffer,format, argptr)
 110
 111     #if defined(__VISUALC__)
 112         #pragma message("Using sprintf() because no snprintf()-like function defined")
 113     #elif defined(__GNUG__) && !defined(__UNIX__)
 114         #warning "Using sprintf() because no snprintf()-like function defined"
 115     #elif defined(__MWERKS__)
 116             #warning "Using sprintf() because no snprintf()-like function defined"
 117     #endif //compiler
 118 #endif // no vsnprintf
 119
 120 #ifdef _AIX
 121   // AIX has vsnprintf, but there's no prototype in the system headers.
 122   extern "C" int vsnprintf(char* str, size_t n, const char* format, va_list ap);
 123 #endif
 124
 125 // ----------------------------------------------------------------------------
 126 // global functions
 127 // ----------------------------------------------------------------------------
 128
 129 #ifdef  wxSTD_STRING_COMPATIBILITY
 130
 131 // MS Visual C++ version 5.0 provides the new STL headers as well as the old
 132 // iostream ones.
 133 //
 134 // ATTN: you can _not_ use both of these in the same program!
 135
 136 istream& operator>>(istream& is, wxString& WXUNUSED(str))
 137 {
 138 #if 0
 139   int w = is.width(0);
 140   if ( is.ipfx(0) ) {
 141     streambuf *sb = is.rdbuf();
 142     str.erase();
 143     while ( true ) {
 144       int ch = sb->sbumpc ();
 145       if ( ch == EOF ) {
 146         is.setstate(ios::eofbit);
 147         break;
 148       }
 149       else if ( isspace(ch) ) {
 150         sb->sungetc();
 151         break;
 152       }
 153
 154       str += ch;
 155       if ( --w == 1 )
 156         break;
 157     }
 158   }
 159
 160   is.isfx();
 161   if ( str.length() == 0 )
 162     is.setstate(ios::failbit);
 163 #endif
 164   return is;
 165 }
 166
 167 #endif  //std::string compatibility
 168
 169 // ----------------------------------------------------------------------------
 170 // private classes
 171 // ----------------------------------------------------------------------------
 172
 173 // this small class is used to gather statistics for performance tuning
 174 //#define WXSTRING_STATISTICS
 175 #ifdef  WXSTRING_STATISTICS
 176   class Averager
 177   {
 178   public:
 179     Averager(const char *sz) { m_sz = sz; m_nTotal = m_nCount = 0; }
 180    ~Averager()
 181    { printf("wxString: average %s = %f\n", m_sz, ((float)m_nTotal)/m_nCount); }
 182
 183     void Add(size_t n) { m_nTotal += n; m_nCount++; }
 184
 185   private:
 186     size_t m_nCount, m_nTotal;
 187     const char *m_sz;
 188   } g_averageLength("allocation size"),
 189     g_averageSummandLength("summand length"),
 190     g_averageConcatHit("hit probability in concat"),
 191     g_averageInitialLength("initial string length");
 192
 193   #define STATISTICS_ADD(av, val) g_average##av.Add(val)
 194 #else
 195   #define STATISTICS_ADD(av, val)
 196 #endif // WXSTRING_STATISTICS
 197
 198 // ===========================================================================
 199 // wxString class core
 200 // ===========================================================================
 201
 202 // ---------------------------------------------------------------------------
 203 // construction
 204 // ---------------------------------------------------------------------------
 205
 206 // constructs string of <nLength> copies of character <ch>
 207 wxString::wxString(wxChar ch, size_t nLength)
 208 {
 209   Init();
 210
 211   if ( nLength > 0 ) {
 212     AllocBuffer(nLength);
 213
 214 #if wxUSE_UNICODE
 215     // memset only works on char
 216     for (size_t n=0; n<nLength; n++) m_pchData[n] = ch;
 217 #else
 218     memset(m_pchData, ch, nLength);
 219 #endif
 220   }
 221 }
 222
 223 // takes nLength elements of psz starting at nPos
 224 void wxString::InitWith(const wxChar *psz, size_t nPos, size_t nLength)
 225 {
 226   Init();
 227
 228   wxASSERT( nPos <= wxStrlen(psz) );
 229
 230   if ( nLength == wxSTRING_MAXLEN )
 231     nLength = wxStrlen(psz + nPos);
 232
 233   STATISTICS_ADD(InitialLength, nLength);
 234
 235   if ( nLength > 0 ) {
 236     // trailing '\0' is written in AllocBuffer()
 237     AllocBuffer(nLength);
 238     memcpy(m_pchData, psz + nPos, nLength*sizeof(wxChar));
 239   }
 240 }
 241
 242 #ifdef  wxSTD_STRING_COMPATIBILITY
 243
 244 // poor man's iterators are "void *" pointers
 245 wxString::wxString(const void *pStart, const void *pEnd)
 246 {
 247   InitWith((const wxChar *)pStart, 0,
 248            (const wxChar *)pEnd - (const wxChar *)pStart);
 249 }
 250
 251 #endif  //std::string compatibility
 252
 253 #if wxUSE_UNICODE
 254
 255 // from multibyte string
 256 wxString::wxString(const char *psz, wxMBConv& conv, size_t nLength)
 257 {
 258   // first get necessary size
 259   size_t nLen = psz ? conv.MB2WC((wchar_t *) NULL, psz, 0) : 0;
 260
 261   // nLength is number of *Unicode* characters here!
 262   if ((nLen != (size_t)-1) && (nLen > nLength))
 263     nLen = nLength;
 264
 265   // empty?
 266   if ( (nLen != 0) && (nLen != (size_t)-1) ) {
 267     AllocBuffer(nLen);
 268     conv.MB2WC(m_pchData, psz, nLen);
 269   }
 270   else {
 271     Init();
 272   }
 273 }
 274
 275 #else
 276
 277 // from wide string
 278 wxString::wxString(const wchar_t *pwz)
 279 {
 280   // first get necessary size
 281   size_t nLen = pwz ? wxWC2MB((char *) NULL, pwz, 0) : 0;
 282
 283   // empty?
 284   if ( (nLen != 0) && (nLen != (size_t)-1) ) {
 285     AllocBuffer(nLen);
 286     wxWC2MB(m_pchData, pwz, nLen);
 287   }
 288   else {
 289     Init();
 290   }
 291 }
 292
 293 #endif
 294
 295 // ---------------------------------------------------------------------------
 296 // memory allocation
 297 // ---------------------------------------------------------------------------
 298
 299 // allocates memory needed to store a C string of length nLen
 300 void wxString::AllocBuffer(size_t nLen)
 301 {
 302   wxASSERT( nLen >  0         );    //
 303   wxASSERT( nLen <= INT_MAX-1 );    // max size (enough room for 1 extra)
 304
 305   STATISTICS_ADD(Length, nLen);
 306
 307   // allocate memory:
 308   // 1) one extra character for '\0' termination
 309   // 2) sizeof(wxStringData) for housekeeping info
 310   wxStringData* pData = (wxStringData*)
 311     malloc(sizeof(wxStringData) + (nLen + EXTRA_ALLOC + 1)*sizeof(wxChar));
 312   pData->nRefs        = 1;
 313   pData->nDataLength  = nLen;
 314   pData->nAllocLength = nLen + EXTRA_ALLOC;
 315   m_pchData           = pData->data();  // data starts after wxStringData
 316   m_pchData[nLen]     = _T('\0');
 317 }
 318
 319 // must be called before changing this string
 320 void wxString::CopyBeforeWrite()
 321 {
 322   wxStringData* pData = GetStringData();
 323
 324   if ( pData->IsShared() ) {
 325     pData->Unlock();                // memory not freed because shared
 326     size_t nLen = pData->nDataLength;
 327     AllocBuffer(nLen);
 328     memcpy(m_pchData, pData->data(), nLen*sizeof(wxChar));
 329   }
 330
 331   wxASSERT( !GetStringData()->IsShared() );  // we must be the only owner
 332 }
 333
 334 // must be called before replacing contents of this string
 335 void wxString::AllocBeforeWrite(size_t nLen)
 336 {
 337   wxASSERT( nLen != 0 );  // doesn't make any sense
 338
 339   // must not share string and must have enough space
 340   wxStringData* pData = GetStringData();
 341   if ( pData->IsShared() || (nLen > pData->nAllocLength) ) {
 342     // can't work with old buffer, get new one
 343     pData->Unlock();
 344     AllocBuffer(nLen);
 345   }
 346   else {
 347     // update the string length
 348     pData->nDataLength = nLen;
 349   }
 350
 351   wxASSERT( !GetStringData()->IsShared() );  // we must be the only owner
 352 }
 353
 354 // allocate enough memory for nLen characters
 355 void wxString::Alloc(size_t nLen)
 356 {
 357   wxStringData *pData = GetStringData();
 358   if ( pData->nAllocLength <= nLen ) {
 359     if ( pData->IsEmpty() ) {
 360       nLen += EXTRA_ALLOC;
 361
 362       wxStringData* pData = (wxStringData*)
 363         malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
 364       pData->nRefs = 1;
 365       pData->nDataLength = 0;
 366       pData->nAllocLength = nLen;
 367       m_pchData = pData->data();  // data starts after wxStringData
 368       m_pchData[0u] = _T('\0');
 369     }
 370     else if ( pData->IsShared() ) {
 371       pData->Unlock();                // memory not freed because shared
 372       size_t nOldLen = pData->nDataLength;
 373       AllocBuffer(nLen);
 374       memcpy(m_pchData, pData->data(), nOldLen*sizeof(wxChar));
 375     }
 376     else {
 377       nLen += EXTRA_ALLOC;
 378
 379       wxStringData *p = (wxStringData *)
 380         realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
 381
 382       if ( p == NULL ) {
 383         // @@@ what to do on memory error?
 384         return;
 385       }
 386
 387       // it's not important if the pointer changed or not (the check for this
 388       // is not faster than assigning to m_pchData in all cases)
 389       p->nAllocLength = nLen;
 390       m_pchData = p->data();
 391     }
 392   }
 393   //else: we've already got enough
 394 }
 395
 396 // shrink to minimal size (releasing extra memory)
 397 void wxString::Shrink()
 398 {
 399   wxStringData *pData = GetStringData();
 400
 401   // this variable is unused in release build, so avoid the compiler warning by
 402   // just not declaring it
 403 #ifdef __WXDEBUG__
 404   void *p =
 405 #endif
 406   realloc(pData, sizeof(wxStringData) + (pData->nDataLength + 1)*sizeof(wxChar));
 407
 408   wxASSERT( p != NULL );  // can't free memory?
 409   wxASSERT( p == pData ); // we're decrementing the size - block shouldn't move!
 410 }
 411
 412 // get the pointer to writable buffer of (at least) nLen bytes
 413 wxChar *wxString::GetWriteBuf(size_t nLen)
 414 {
 415   AllocBeforeWrite(nLen);
 416
 417   wxASSERT( GetStringData()->nRefs == 1 );
 418   GetStringData()->Validate(FALSE);
 419
 420   return m_pchData;
 421 }
 422
 423 // put string back in a reasonable state after GetWriteBuf
 424 void wxString::UngetWriteBuf()
 425 {
 426   GetStringData()->nDataLength = wxStrlen(m_pchData);
 427   GetStringData()->Validate(TRUE);
 428 }
 429
 430 // ---------------------------------------------------------------------------
 431 // data access
 432 // ---------------------------------------------------------------------------
 433
 434 // all functions are inline in string.h
 435
 436 // ---------------------------------------------------------------------------
 437 // assignment operators
 438 // ---------------------------------------------------------------------------
 439
 440 // helper function: does real copy
 441 void wxString::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData)
 442 {
 443   if ( nSrcLen == 0 ) {
 444     Reinit();
 445   }
 446   else {
 447     AllocBeforeWrite(nSrcLen);
 448     memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(wxChar));
 449     GetStringData()->nDataLength = nSrcLen;
 450     m_pchData[nSrcLen] = _T('\0');
 451   }
 452 }
 453
 454 // assigns one string to another
 455 wxString& wxString::operator=(const wxString& stringSrc)
 456 {
 457   wxASSERT( stringSrc.GetStringData()->IsValid() );
 458
 459   // don't copy string over itself
 460   if ( m_pchData != stringSrc.m_pchData ) {
 461     if ( stringSrc.GetStringData()->IsEmpty() ) {
 462       Reinit();
 463     }
 464     else {
 465       // adjust references
 466       GetStringData()->Unlock();
 467       m_pchData = stringSrc.m_pchData;
 468       GetStringData()->Lock();
 469     }
 470   }
 471
 472   return *this;
 473 }
 474
 475 // assigns a single character
 476 wxString& wxString::operator=(wxChar ch)
 477 {
 478   AssignCopy(1, &ch);
 479   return *this;
 480 }
 481
 482 // assigns C string
 483 wxString& wxString::operator=(const wxChar *psz)
 484 {
 485   AssignCopy(wxStrlen(psz), psz);
 486   return *this;
 487 }
 488
 489 #if !wxUSE_UNICODE
 490
 491 // same as 'signed char' variant
 492 wxString& wxString::operator=(const unsigned char* psz)
 493 {
 494   *this = (const char *)psz;
 495   return *this;
 496 }
 497
 498 wxString& wxString::operator=(const wchar_t *pwz)
 499 {
 500   wxString str(pwz);
 501   *this = str;
 502   return *this;
 503 }
 504
 505 #endif
 506
 507 // ---------------------------------------------------------------------------
 508 // string concatenation
 509 // ---------------------------------------------------------------------------
 510
 511 // add something to this string
 512 void wxString::ConcatSelf(int nSrcLen, const wxChar *pszSrcData)
 513 {
 514   STATISTICS_ADD(SummandLength, nSrcLen);
 515
 516   // concatenating an empty string is a NOP
 517   if ( nSrcLen > 0 ) {
 518     wxStringData *pData = GetStringData();
 519     size_t nLen = pData->nDataLength;
 520     size_t nNewLen = nLen + nSrcLen;
 521
 522     // alloc new buffer if current is too small
 523     if ( pData->IsShared() ) {
 524       STATISTICS_ADD(ConcatHit, 0);
 525
 526       // we have to allocate another buffer
 527       wxStringData* pOldData = GetStringData();
 528       AllocBuffer(nNewLen);
 529       memcpy(m_pchData, pOldData->data(), nLen*sizeof(wxChar));
 530       pOldData->Unlock();
 531     }
 532     else if ( nNewLen > pData->nAllocLength ) {
 533       STATISTICS_ADD(ConcatHit, 0);
 534
 535       // we have to grow the buffer
 536       Alloc(nNewLen);
 537     }
 538     else {
 539       STATISTICS_ADD(ConcatHit, 1);
 540
 541       // the buffer is already big enough
 542     }
 543
 544     // should be enough space
 545     wxASSERT( nNewLen <= GetStringData()->nAllocLength );
 546
 547     // fast concatenation - all is done in our buffer
 548     memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(wxChar));
 549
 550     m_pchData[nNewLen] = _T('\0');          // put terminating '\0'
 551     GetStringData()->nDataLength = nNewLen; // and fix the length
 552   }
 553   //else: the string to append was empty
 554 }
 555
 556 /*
 557  * concatenation functions come in 5 flavours:
 558  *  string + string
 559  *  char   + string      and      string + char
 560  *  C str  + string      and      string + C str
 561  */
 562
 563 wxString operator+(const wxString& string1, const wxString& string2)
 564 {
 565   wxASSERT( string1.GetStringData()->IsValid() );
 566   wxASSERT( string2.GetStringData()->IsValid() );
 567
 568   wxString s = string1;
 569   s += string2;
 570
 571   return s;
 572 }
 573
 574 wxString operator+(const wxString& string, wxChar ch)
 575 {
 576   wxASSERT( string.GetStringData()->IsValid() );
 577
 578   wxString s = string;
 579   s += ch;
 580
 581   return s;
 582 }
 583
 584 wxString operator+(wxChar ch, const wxString& string)
 585 {
 586   wxASSERT( string.GetStringData()->IsValid() );
 587
 588   wxString s = ch;
 589   s += string;
 590
 591   return s;
 592 }
 593
 594 wxString operator+(const wxString& string, const wxChar *psz)
 595 {
 596   wxASSERT( string.GetStringData()->IsValid() );
 597
 598   wxString s;
 599   s.Alloc(wxStrlen(psz) + string.Len());
 600   s = string;
 601   s += psz;
 602
 603   return s;
 604 }
 605
 606 wxString operator+(const wxChar *psz, const wxString& string)
 607 {
 608   wxASSERT( string.GetStringData()->IsValid() );
 609
 610   wxString s;
 611   s.Alloc(wxStrlen(psz) + string.Len());
 612   s = psz;
 613   s += string;
 614
 615   return s;
 616 }
 617
 618 // ===========================================================================
 619 // other common string functions
 620 // ===========================================================================
 621
 622 // ---------------------------------------------------------------------------
 623 // simple sub-string extraction
 624 // ---------------------------------------------------------------------------
 625
 626 // helper function: clone the data attached to this string
 627 void wxString::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const
 628 {
 629   if ( nCopyLen == 0 ) {
 630     dest.Init();
 631   }
 632   else {
 633     dest.AllocBuffer(nCopyLen);
 634     memcpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen*sizeof(wxChar));
 635   }
 636 }
 637
 638 // extract string of length nCount starting at nFirst
 639 wxString wxString::Mid(size_t nFirst, size_t nCount) const
 640 {
 641   wxStringData *pData = GetStringData();
 642   size_t nLen = pData->nDataLength;
 643
 644   // default value of nCount is wxSTRING_MAXLEN and means "till the end"
 645   if ( nCount == wxSTRING_MAXLEN )
 646   {
 647     nCount = nLen - nFirst;
 648   }
 649
 650   // out-of-bounds requests return sensible things
 651   if ( nFirst + nCount > nLen )
 652   {
 653     nCount = nLen - nFirst;
 654   }
 655
 656   if ( nFirst > nLen )
 657   {
 658     // AllocCopy() will return empty string
 659     nCount = 0;
 660   }
 661
 662   wxString dest;
 663   AllocCopy(dest, nCount, nFirst);
 664
 665   return dest;
 666 }
 667
 668 // extract nCount last (rightmost) characters
 669 wxString wxString::Right(size_t nCount) const
 670 {
 671   if ( nCount > (size_t)GetStringData()->nDataLength )
 672     nCount = GetStringData()->nDataLength;
 673
 674   wxString dest;
 675   AllocCopy(dest, nCount, GetStringData()->nDataLength - nCount);
 676   return dest;
 677 }
 678
 679 // get all characters after the last occurence of ch
 680 // (returns the whole string if ch not found)
 681 wxString wxString::AfterLast(wxChar ch) const
 682 {
 683   wxString str;
 684   int iPos = Find(ch, TRUE);
 685   if ( iPos == wxNOT_FOUND )
 686     str = *this;
 687   else
 688     str = c_str() + iPos + 1;
 689
 690   return str;
 691 }
 692
 693 // extract nCount first (leftmost) characters
 694 wxString wxString::Left(size_t nCount) const
 695 {
 696   if ( nCount > (size_t)GetStringData()->nDataLength )
 697     nCount = GetStringData()->nDataLength;
 698
 699   wxString dest;
 700   AllocCopy(dest, nCount, 0);
 701   return dest;
 702 }
 703
 704 // get all characters before the first occurence of ch
 705 // (returns the whole string if ch not found)
 706 wxString wxString::BeforeFirst(wxChar ch) const
 707 {
 708   wxString str;
 709   for ( const wxChar *pc = m_pchData; *pc != _T('\0') && *pc != ch; pc++ )
 710     str += *pc;
 711
 712   return str;
 713 }
 714
 715 /// get all characters before the last occurence of ch
 716 /// (returns empty string if ch not found)
 717 wxString wxString::BeforeLast(wxChar ch) const
 718 {
 719   wxString str;
 720   int iPos = Find(ch, TRUE);
 721   if ( iPos != wxNOT_FOUND && iPos != 0 )
 722     str = wxString(c_str(), iPos);
 723
 724   return str;
 725 }
 726
 727 /// get all characters after the first occurence of ch
 728 /// (returns empty string if ch not found)
 729 wxString wxString::AfterFirst(wxChar ch) const
 730 {
 731   wxString str;
 732   int iPos = Find(ch);
 733   if ( iPos != wxNOT_FOUND )
 734     str = c_str() + iPos + 1;
 735
 736   return str;
 737 }
 738
 739 // replace first (or all) occurences of some substring with another one
 740 size_t wxString::Replace(const wxChar *szOld, const wxChar *szNew, bool bReplaceAll)
 741 {
 742   size_t uiCount = 0;   // count of replacements made
 743
 744   size_t uiOldLen = wxStrlen(szOld);
 745
 746   wxString strTemp;
 747   const wxChar *pCurrent = m_pchData;
 748   const wxChar *pSubstr;
 749   while ( *pCurrent != _T('\0') ) {
 750     pSubstr = wxStrstr(pCurrent, szOld);
 751     if ( pSubstr == NULL ) {
 752       // strTemp is unused if no replacements were made, so avoid the copy
 753       if ( uiCount == 0 )
 754         return 0;
 755
 756       strTemp += pCurrent;    // copy the rest
 757       break;                  // exit the loop
 758     }
 759     else {
 760       // take chars before match
 761       strTemp.ConcatSelf(pSubstr - pCurrent, pCurrent);
 762       strTemp += szNew;
 763       pCurrent = pSubstr + uiOldLen;  // restart after match
 764
 765       uiCount++;
 766
 767       // stop now?
 768       if ( !bReplaceAll ) {
 769         strTemp += pCurrent;    // copy the rest
 770         break;                  // exit the loop
 771       }
 772     }
 773   }
 774
 775   // only done if there were replacements, otherwise would have returned above
 776   *this = strTemp;
 777
 778   return uiCount;
 779 }
 780
 781 bool wxString::IsAscii() const
 782 {
 783   const wxChar *s = (const wxChar*) *this;
 784   while(*s){
 785     if(!isascii(*s)) return(FALSE);
 786     s++;
 787   }
 788   return(TRUE);
 789 }
 790
 791 bool wxString::IsWord() const
 792 {
 793   const wxChar *s = (const wxChar*) *this;
 794   while(*s){
 795     if(!wxIsalpha(*s)) return(FALSE);
 796     s++;
 797   }
 798   return(TRUE);
 799 }
 800
 801 bool wxString::IsNumber() const
 802 {
 803   const wxChar *s = (const wxChar*) *this;
 804   while(*s){
 805     if(!wxIsdigit(*s)) return(FALSE);
 806     s++;
 807   }
 808   return(TRUE);
 809 }
 810
 811 wxString wxString::Strip(stripType w) const
 812 {
 813     wxString s = *this;
 814     if ( w & leading ) s.Trim(FALSE);
 815     if ( w & trailing ) s.Trim(TRUE);
 816     return s;
 817 }
 818
 819 // ---------------------------------------------------------------------------
 820 // case conversion
 821 // ---------------------------------------------------------------------------
 822
 823 wxString& wxString::MakeUpper()
 824 {
 825   CopyBeforeWrite();
 826
 827   for ( wxChar *p = m_pchData; *p; p++ )
 828     *p = (wxChar)wxToupper(*p);
 829
 830   return *this;
 831 }
 832
 833 wxString& wxString::MakeLower()
 834 {
 835   CopyBeforeWrite();
 836
 837   for ( wxChar *p = m_pchData; *p; p++ )
 838     *p = (wxChar)wxTolower(*p);
 839
 840   return *this;
 841 }
 842
 843 // ---------------------------------------------------------------------------
 844 // trimming and padding
 845 // ---------------------------------------------------------------------------
 846
 847 // trims spaces (in the sense of isspace) from left or right side
 848 wxString& wxString::Trim(bool bFromRight)
 849 {
 850   // first check if we're going to modify the string at all
 851   if ( !IsEmpty() &&
 852        (
 853         (bFromRight && wxIsspace(GetChar(Len() - 1))) ||
 854         (!bFromRight && wxIsspace(GetChar(0u)))
 855        )
 856      )
 857   {
 858     // ok, there is at least one space to trim
 859     CopyBeforeWrite();
 860
 861     if ( bFromRight )
 862     {
 863       // find last non-space character
 864       wxChar *psz = m_pchData + GetStringData()->nDataLength - 1;
 865       while ( wxIsspace(*psz) && (psz >= m_pchData) )
 866         psz--;
 867
 868       // truncate at trailing space start
 869       *++psz = _T('\0');
 870       GetStringData()->nDataLength = psz - m_pchData;
 871     }
 872     else
 873     {
 874       // find first non-space character
 875       const wxChar *psz = m_pchData;
 876       while ( wxIsspace(*psz) )
 877         psz++;
 878
 879       // fix up data and length
 880       int nDataLength = GetStringData()->nDataLength - (psz - (const wxChar*) m_pchData);
 881       memmove(m_pchData, psz, (nDataLength + 1)*sizeof(wxChar));
 882       GetStringData()->nDataLength = nDataLength;
 883     }
 884   }
 885
 886   return *this;
 887 }
 888
 889 // adds nCount characters chPad to the string from either side
 890 wxString& wxString::Pad(size_t nCount, wxChar chPad, bool bFromRight)
 891 {
 892   wxString s(chPad, nCount);
 893
 894   if ( bFromRight )
 895     *this += s;
 896   else
 897   {
 898     s += *this;
 899     *this = s;
 900   }
 901
 902   return *this;
 903 }
 904
 905 // truncate the string
 906 wxString& wxString::Truncate(size_t uiLen)
 907 {
 908   if ( uiLen < Len() ) {
 909     CopyBeforeWrite();
 910
 911     *(m_pchData + uiLen) = _T('\0');
 912     GetStringData()->nDataLength = uiLen;
 913   }
 914   //else: nothing to do, string is already short enough
 915
 916   return *this;
 917 }
 918
 919 // ---------------------------------------------------------------------------
 920 // finding (return wxNOT_FOUND if not found and index otherwise)
 921 // ---------------------------------------------------------------------------
 922
 923 // find a character
 924 int wxString::Find(wxChar ch, bool bFromEnd) const
 925 {
 926   const wxChar *psz = bFromEnd ? wxStrrchr(m_pchData, ch) : wxStrchr(m_pchData, ch);
 927
 928   return (psz == NULL) ? wxNOT_FOUND : psz - (const wxChar*) m_pchData;
 929 }
 930
 931 // find a sub-string (like strstr)
 932 int wxString::Find(const wxChar *pszSub) const
 933 {
 934   const wxChar *psz = wxStrstr(m_pchData, pszSub);
 935
 936   return (psz == NULL) ? wxNOT_FOUND : psz - (const wxChar*) m_pchData;
 937 }
 938
 939 // ---------------------------------------------------------------------------
 940 // stream-like operators
 941 // ---------------------------------------------------------------------------
 942 wxString& wxString::operator<<(int i)
 943 {
 944     wxString res;
 945     res.Printf(_T("%d"), i);
 946
 947     return (*this) << res;
 948 }
 949
 950 wxString& wxString::operator<<(float f)
 951 {
 952     wxString res;
 953     res.Printf(_T("%f"), f);
 954
 955     return (*this) << res;
 956 }
 957
 958 wxString& wxString::operator<<(double d)
 959 {
 960     wxString res;
 961     res.Printf(_T("%g"), d);
 962
 963     return (*this) << res;
 964 }
 965
 966 // ---------------------------------------------------------------------------
 967 // formatted output
 968 // ---------------------------------------------------------------------------
 969 int wxString::Printf(const wxChar *pszFormat, ...)
 970 {
 971   va_list argptr;
 972   va_start(argptr, pszFormat);
 973
 974   int iLen = PrintfV(pszFormat, argptr);
 975
 976   va_end(argptr);
 977
 978   return iLen;
 979 }
 980
 981 int wxString::PrintfV(const wxChar* pszFormat, va_list argptr)
 982 {
 983   // static buffer to avoid dynamic memory allocation each time
 984   static char s_szScratch[1024];
 985 #if wxUSE_THREADS
 986   // protect the static buffer
 987   static wxCriticalSection critsect;
 988   wxCriticalSectionLocker lock(critsect);
 989 #endif
 990
 991 #if 1 // the new implementation
 992
 993   Reinit();
 994   for (size_t n = 0; pszFormat[n]; n++)
 995     if (pszFormat[n] == _T('%')) {
 996       static char s_szFlags[256] = "%";
 997       size_t flagofs = 1;
 998       bool adj_left = FALSE, in_prec = FALSE,
 999            prec_dot = FALSE, done = FALSE;
1000       int ilen = 0;
1001       size_t min_width = 0, max_width = wxSTRING_MAXLEN;
1002       do {
1003 #define CHECK_PREC if (in_prec && !prec_dot) { s_szFlags[flagofs++] = '.'; prec_dot = TRUE; }
1004         switch (pszFormat[++n]) {
1005         case _T('\0'):
1006           done = TRUE;
1007           break;
1008         case _T('%'):
1009           *this += _T('%');
1010           done = TRUE;
1011           break;
1012         case _T('#'):
1013         case _T('0'):
1014         case _T(' '):
1015         case _T('+'):
1016         case _T('\''):
1017           CHECK_PREC
1018           s_szFlags[flagofs++] = pszFormat[n];
1019           break;
1020         case _T('-'):
1021           CHECK_PREC
1022           adj_left = TRUE;
1023           s_szFlags[flagofs++] = pszFormat[n];
1024           break;
1025         case _T('.'):
1026           CHECK_PREC
1027           in_prec = TRUE;
1028           prec_dot = FALSE;
1029           max_width = 0;
1030           // dot will be auto-added to s_szFlags if non-negative number follows
1031           break;
1032         case _T('h'):
1033           ilen = -1;
1034           CHECK_PREC
1035           s_szFlags[flagofs++] = pszFormat[n];
1036           break;
1037         case _T('l'):
1038           ilen = 1;
1039           CHECK_PREC
1040           s_szFlags[flagofs++] = pszFormat[n];
1041           break;
1042         case _T('q'):
1043         case _T('L'):
1044           ilen = 2;
1045           CHECK_PREC
1046           s_szFlags[flagofs++] = pszFormat[n];
1047           break;
1048         case _T('Z'):
1049           ilen = 3;
1050           CHECK_PREC
1051           s_szFlags[flagofs++] = pszFormat[n];
1052           break;
1053         case _T('*'):
1054           {
1055             int len = va_arg(argptr, int);
1056             if (in_prec) {
1057               if (len<0) break;
1058               CHECK_PREC
1059               max_width = len;
1060             } else {
1061               if (len<0) {
1062                 adj_left = !adj_left;
1063                 s_szFlags[flagofs++] = '-';
1064                 len = -len;
1065               }
1066               min_width = len;
1067             }
1068             flagofs += ::sprintf(s_szFlags+flagofs,"%d",len);
1069           }
1070           break;
1071         case _T('1'): case _T('2'): case _T('3'):
1072         case _T('4'): case _T('5'): case _T('6'):
1073         case _T('7'): case _T('8'): case _T('9'):
1074           {
1075             int len = 0;
1076             CHECK_PREC
1077             while ((pszFormat[n]>=_T('0')) && (pszFormat[n]<=_T('9'))) {
1078               s_szFlags[flagofs++] = pszFormat[n];
1079               len = len*10 + (pszFormat[n] - _T('0'));
1080               n++;
1081             }
1082             if (in_prec) max_width = len;
1083             else min_width = len;
1084             n--; // the main loop pre-increments n again
1085           }
1086           break;
1087         case _T('d'):
1088         case _T('i'):
1089         case _T('o'):
1090         case _T('u'):
1091         case _T('x'):
1092         case _T('X'):
1093           CHECK_PREC
1094           s_szFlags[flagofs++] = pszFormat[n];
1095           s_szFlags[flagofs] = '\0';
1096           if (ilen == 0 ) {
1097             int val = va_arg(argptr, int);
1098             ::sprintf(s_szScratch, s_szFlags, val);
1099           }
1100           else if (ilen == -1) {
1101             short int val = va_arg(argptr, short int);
1102             ::sprintf(s_szScratch, s_szFlags, val);
1103           }
1104           else if (ilen == 1) {
1105             long int val = va_arg(argptr, long int);
1106             ::sprintf(s_szScratch, s_szFlags, val);
1107           }
1108           else if (ilen == 2) {
1109 #if SIZEOF_LONG_LONG
1110             long long int val = va_arg(argptr, long long int);
1111             ::sprintf(s_szScratch, s_szFlags, val);
1112 #else
1113             long int val = va_arg(argptr, long int);
1114             ::sprintf(s_szScratch, s_szFlags, val);
1115 #endif
1116           }
1117           else if (ilen == 3) {
1118             size_t val = va_arg(argptr, size_t);
1119             ::sprintf(s_szScratch, s_szFlags, val);
1120           }
1121           *this += wxString(s_szScratch);
1122           done = TRUE;
1123           break;
1124         case _T('e'):
1125         case _T('E'):
1126         case _T('f'):
1127         case _T('g'):
1128         case _T('G'):
1129           CHECK_PREC
1130           s_szFlags[flagofs++] = pszFormat[n];
1131           s_szFlags[flagofs] = '\0';
1132           if (ilen == 2) {
1133             long double val = va_arg(argptr, long double);
1134             ::sprintf(s_szScratch, s_szFlags, val);
1135           } else {
1136             double val = va_arg(argptr, double);
1137             ::sprintf(s_szScratch, s_szFlags, val);
1138           }
1139           *this += wxString(s_szScratch);
1140           done = TRUE;
1141           break;
1142         case _T('p'):
1143           {
1144             void *val = va_arg(argptr, void *);
1145             CHECK_PREC
1146             s_szFlags[flagofs++] = pszFormat[n];
1147             s_szFlags[flagofs] = '\0';
1148             ::sprintf(s_szScratch, s_szFlags, val);
1149             *this += wxString(s_szScratch);
1150             done = TRUE;
1151           }
1152           break;
1153         case _T('c'):
1154           {
1155             wxChar val = va_arg(argptr, int);
1156             // we don't need to honor padding here, do we?
1157             *this += val;
1158             done = TRUE;
1159           }
1160           break;
1161         case _T('s'):
1162           if (ilen == -1) {
1163             // wx extension: we'll let %hs mean non-Unicode strings
1164             char *val = va_arg(argptr, char *);
1165 #if wxUSE_UNICODE
1166             // ASCII->Unicode constructor handles max_width right
1167             wxString s(val, wxConv_libc, max_width);
1168 #else
1169             size_t len = wxSTRING_MAXLEN;
1170             if (val) {
1171               for (len = 0; val[len] && (len<max_width); len++);
1172             } else val = _T("(null)");
1173             wxString s(val, len);
1174 #endif
1175             if (s.Len() < min_width)
1176               s.Pad(min_width - s.Len(), _T(' '), adj_left);
1177             *this += s;
1178           } else {
1179             wxChar *val = va_arg(argptr, wxChar *);
1180             size_t len = wxSTRING_MAXLEN;
1181             if (val) {
1182               for (len = 0; val[len] && (len<max_width); len++);
1183             } else val = _T("(null)");
1184             wxString s(val, len);
1185             if (s.Len() < min_width)
1186               s.Pad(min_width - s.Len(), _T(' '), adj_left);
1187             *this += s;
1188           }
1189           done = TRUE;
1190           break;
1191         case _T('n'):
1192           if (ilen == 0) {
1193             int *val = va_arg(argptr, int *);
1194             *val = Len();
1195           }
1196           else if (ilen == -1) {
1197             short int *val = va_arg(argptr, short int *);
1198             *val = Len();
1199           }
1200           else if (ilen >= 1) {
1201             long int *val = va_arg(argptr, long int *);
1202             *val = Len();
1203           }
1204           done = TRUE;
1205           break;
1206         default:
1207           if (wxIsalpha(pszFormat[n]))
1208             // probably some flag not taken care of here yet
1209             s_szFlags[flagofs++] = pszFormat[n];
1210           else {
1211             // bad format
1212             *this += _T('%'); // just to pass the glibc tst-printf.c
1213             n--;
1214             done = TRUE;
1215           }
1216           break;
1217         }
1218 #undef CHECK_PREC
1219       } while (!done);
1220     } else *this += pszFormat[n];
1221
1222 #else
1223   // NB: wxVsnprintf() may return either less than the buffer size or -1 if there
1224   //     is not enough place depending on implementation
1225   int iLen = wxVsnprintf(s_szScratch, WXSIZEOF(s_szScratch), pszFormat, argptr);
1226   char *buffer;
1227   if ( iLen < (int)WXSIZEOF(s_szScratch) ) {
1228     buffer = s_szScratch;
1229   }
1230   else {
1231       int size = WXSIZEOF(s_szScratch) * 2;
1232       buffer = (char *)malloc(size);
1233       while ( buffer != NULL ) {
1234           iLen = wxVsnprintf(buffer, WXSIZEOF(s_szScratch), pszFormat, argptr);
1235           if ( iLen < size ) {
1236               // ok, there was enough space
1237               break;
1238           }
1239
1240           // still not enough, double it again
1241           buffer = (char *)realloc(buffer, size *= 2);
1242       }
1243
1244       if ( !buffer ) {
1245           // out of memory
1246           return -1;
1247       }
1248   }
1249
1250   wxString s(buffer);
1251   *this = s;
1252
1253   if ( buffer != s_szScratch )
1254       free(buffer);
1255 #endif
1256
1257   return Len();
1258 }
1259
1260 // ----------------------------------------------------------------------------
1261 // misc other operations
1262 // ----------------------------------------------------------------------------
1263 bool wxString::Matches(const wxChar *pszMask) const
1264 {
1265   // check char by char
1266   const wxChar *pszTxt;
1267   for ( pszTxt = c_str(); *pszMask != _T('\0'); pszMask++, pszTxt++ ) {
1268     switch ( *pszMask ) {
1269       case _T('?'):
1270         if ( *pszTxt == _T('\0') )
1271           return FALSE;
1272
1273         pszTxt++;
1274         pszMask++;
1275         break;
1276
1277       case _T('*'):
1278         {
1279           // ignore special chars immediately following this one
1280           while ( *pszMask == _T('*') || *pszMask == _T('?') )
1281             pszMask++;
1282
1283           // if there is nothing more, match
1284           if ( *pszMask == _T('\0') )
1285             return TRUE;
1286
1287           // are there any other metacharacters in the mask?
1288           size_t uiLenMask;
1289           const wxChar *pEndMask = wxStrpbrk(pszMask, _T("*?"));
1290
1291           if ( pEndMask != NULL ) {
1292             // we have to match the string between two metachars
1293             uiLenMask = pEndMask - pszMask;
1294           }
1295           else {
1296             // we have to match the remainder of the string
1297             uiLenMask = wxStrlen(pszMask);
1298           }
1299
1300           wxString strToMatch(pszMask, uiLenMask);
1301           const wxChar* pMatch = wxStrstr(pszTxt, strToMatch);
1302           if ( pMatch == NULL )
1303             return FALSE;
1304
1305           // -1 to compensate "++" in the loop
1306           pszTxt = pMatch + uiLenMask - 1;
1307           pszMask += uiLenMask - 1;
1308         }
1309         break;
1310
1311       default:
1312         if ( *pszMask != *pszTxt )
1313           return FALSE;
1314         break;
1315     }
1316   }
1317
1318   // match only if nothing left
1319   return *pszTxt == _T('\0');
1320 }
1321
1322 // Count the number of chars
1323 int wxString::Freq(wxChar ch) const
1324 {
1325     int count = 0;
1326     int len = Len();
1327     for (int i = 0; i < len; i++)
1328     {
1329         if (GetChar(i) == ch)
1330             count ++;
1331     }
1332     return count;
1333 }
1334
1335 // convert to upper case, return the copy of the string
1336 wxString wxString::Upper() const
1337 { wxString s(*this); return s.MakeUpper(); }
1338
1339 // convert to lower case, return the copy of the string
1340 wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
1341
1342 int wxString::sprintf(const wxChar *pszFormat, ...)
1343   {
1344     va_list argptr;
1345     va_start(argptr, pszFormat);
1346     int iLen = PrintfV(pszFormat, argptr);
1347     va_end(argptr);
1348     return iLen;
1349   }
1350
1351 // ---------------------------------------------------------------------------
1352 // standard C++ library string functions
1353 // ---------------------------------------------------------------------------
1354 #ifdef  wxSTD_STRING_COMPATIBILITY
1355
1356 wxString& wxString::insert(size_t nPos, const wxString& str)
1357 {
1358   wxASSERT( str.GetStringData()->IsValid() );
1359   wxASSERT( nPos <= Len() );
1360
1361   if ( !str.IsEmpty() ) {
1362     wxString strTmp;
1363     wxChar *pc = strTmp.GetWriteBuf(Len() + str.Len());
1364     wxStrncpy(pc, c_str(), nPos);
1365     wxStrcpy(pc + nPos, str);
1366     wxStrcpy(pc + nPos + str.Len(), c_str() + nPos);
1367     strTmp.UngetWriteBuf();
1368     *this = strTmp;
1369   }
1370
1371   return *this;
1372 }
1373
1374 size_t wxString::find(const wxString& str, size_t nStart) const
1375 {
1376   wxASSERT( str.GetStringData()->IsValid() );
1377   wxASSERT( nStart <= Len() );
1378
1379   const wxChar *p = wxStrstr(c_str() + nStart, str);
1380
1381   return p == NULL ? npos : p - c_str();
1382 }
1383
1384 // VC++ 1.5 can't cope with the default argument in the header.
1385 #if !defined(__VISUALC__) || defined(__WIN32__)
1386 size_t wxString::find(const wxChar* sz, size_t nStart, size_t n) const
1387 {
1388   return find(wxString(sz, n == npos ? 0 : n), nStart);
1389 }
1390 #endif // VC++ 1.5
1391
1392 // Gives a duplicate symbol (presumably a case-insensitivity problem)
1393 #if !defined(__BORLANDC__)
1394 size_t wxString::find(wxChar ch, size_t nStart) const
1395 {
1396   wxASSERT( nStart <= Len() );
1397
1398   const wxChar *p = wxStrchr(c_str() + nStart, ch);
1399
1400   return p == NULL ? npos : p - c_str();
1401 }
1402 #endif
1403
1404 size_t wxString::rfind(const wxString& str, size_t nStart) const
1405 {
1406   wxASSERT( str.GetStringData()->IsValid() );
1407   wxASSERT( nStart <= Len() );
1408
1409   // # could be quicker than that
1410   const wxChar *p = c_str() + (nStart == npos ? Len() : nStart);
1411   while ( p >= c_str() + str.Len() ) {
1412     if ( wxStrncmp(p - str.Len(), str, str.Len()) == 0 )
1413       return p - str.Len() - c_str();
1414     p--;
1415   }
1416
1417   return npos;
1418 }
1419
1420 // VC++ 1.5 can't cope with the default argument in the header.
1421 #if !defined(__VISUALC__) || defined(__WIN32__)
1422 size_t wxString::rfind(const wxChar* sz, size_t nStart, size_t n) const
1423 {
1424   return rfind(wxString(sz, n == npos ? 0 : n), nStart);
1425 }
1426
1427 size_t wxString::rfind(wxChar ch, size_t nStart) const
1428 {
1429   wxASSERT( nStart <= Len() );
1430
1431   const wxChar *p = wxStrrchr(c_str() + nStart, ch);
1432
1433   return p == NULL ? npos : p - c_str();
1434 }
1435 #endif // VC++ 1.5
1436
1437 wxString wxString::substr(size_t nStart, size_t nLen) const
1438 {
1439   // npos means 'take all'
1440   if ( nLen == npos )
1441     nLen = 0;
1442
1443   wxASSERT( nStart + nLen <= Len() );
1444
1445   return wxString(c_str() + nStart, nLen == npos ? 0 : nLen);
1446 }
1447
1448 wxString& wxString::erase(size_t nStart, size_t nLen)
1449 {
1450   wxString strTmp(c_str(), nStart);
1451   if ( nLen != npos ) {
1452     wxASSERT( nStart + nLen <= Len() );
1453
1454     strTmp.append(c_str() + nStart + nLen);
1455   }
1456
1457   *this = strTmp;
1458   return *this;
1459 }
1460
1461 wxString& wxString::replace(size_t nStart, size_t nLen, const wxChar *sz)
1462 {
1463   wxASSERT( nStart + nLen <= wxStrlen(sz) );
1464
1465   wxString strTmp;
1466   if ( nStart != 0 )
1467     strTmp.append(c_str(), nStart);
1468   strTmp += sz;
1469   strTmp.append(c_str() + nStart + nLen);
1470
1471   *this = strTmp;
1472   return *this;
1473 }
1474
1475 wxString& wxString::replace(size_t nStart, size_t nLen, size_t nCount, wxChar ch)
1476 {
1477   return replace(nStart, nLen, wxString(ch, nCount));
1478 }
1479
1480 wxString& wxString::replace(size_t nStart, size_t nLen,
1481                             const wxString& str, size_t nStart2, size_t nLen2)
1482 {
1483   return replace(nStart, nLen, str.substr(nStart2, nLen2));
1484 }
1485
1486 wxString& wxString::replace(size_t nStart, size_t nLen,
1487                         const wxChar* sz, size_t nCount)
1488 {
1489   return replace(nStart, nLen, wxString(sz, nCount));
1490 }
1491
1492 #endif  //std::string compatibility
1493
1494 // ============================================================================
1495 // ArrayString
1496 // ============================================================================
1497
1498 // size increment = max(50% of current size, ARRAY_MAXSIZE_INCREMENT)
1499 #define   ARRAY_MAXSIZE_INCREMENT       4096
1500 #ifndef   ARRAY_DEFAULT_INITIAL_SIZE    // also defined in dynarray.h
1501   #define   ARRAY_DEFAULT_INITIAL_SIZE    (16)
1502 #endif
1503
1504 #define   STRING(p)   ((wxString *)(&(p)))
1505
1506 // ctor
1507 wxArrayString::wxArrayString()
1508 {
1509   m_nSize  =
1510   m_nCount = 0;
1511   m_pItems = (wxChar **) NULL;
1512 }
1513
1514 // copy ctor
1515 wxArrayString::wxArrayString(const wxArrayString& src)
1516 {
1517   m_nSize  =
1518   m_nCount = 0;
1519   m_pItems = (wxChar **) NULL;
1520
1521   *this = src;
1522 }
1523
1524 // assignment operator
1525 wxArrayString& wxArrayString::operator=(const wxArrayString& src)
1526 {
1527   if ( m_nSize > 0 )
1528     Clear();
1529
1530   if ( src.m_nCount > ARRAY_DEFAULT_INITIAL_SIZE )
1531     Alloc(src.m_nCount);
1532
1533   // we can't just copy the pointers here because otherwise we would share
1534   // the strings with another array
1535   for ( size_t n = 0; n < src.m_nCount; n++ )
1536     Add(src[n]);
1537
1538   if ( m_nCount != 0 )
1539     memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(wxChar *));
1540
1541   return *this;
1542 }
1543
1544 // grow the array
1545 void wxArrayString::Grow()
1546 {
1547   // only do it if no more place
1548   if( m_nCount == m_nSize ) {
1549     if( m_nSize == 0 ) {
1550       // was empty, alloc some memory
1551       m_nSize = ARRAY_DEFAULT_INITIAL_SIZE;
1552       m_pItems = new wxChar *[m_nSize];
1553     }
1554     else {
1555       // otherwise when it's called for the first time, nIncrement would be 0
1556       // and the array would never be expanded
1557       wxASSERT( ARRAY_DEFAULT_INITIAL_SIZE != 0 );
1558
1559       // add 50% but not too much
1560       size_t nIncrement = m_nSize < ARRAY_DEFAULT_INITIAL_SIZE
1561                           ? ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1;
1562       if ( nIncrement > ARRAY_MAXSIZE_INCREMENT )
1563         nIncrement = ARRAY_MAXSIZE_INCREMENT;
1564       m_nSize += nIncrement;
1565       wxChar **pNew = new wxChar *[m_nSize];
1566
1567       // copy data to new location
1568       memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *));
1569
1570       // delete old memory (but do not release the strings!)
1571       wxDELETEA(m_pItems);
1572
1573       m_pItems = pNew;
1574     }
1575   }
1576 }
1577
1578 void wxArrayString::Free()
1579 {
1580   for ( size_t n = 0; n < m_nCount; n++ ) {
1581     STRING(m_pItems[n])->GetStringData()->Unlock();
1582   }
1583 }
1584
1585 // deletes all the strings from the list
1586 void wxArrayString::Empty()
1587 {
1588   Free();
1589
1590   m_nCount = 0;
1591 }
1592
1593 // as Empty, but also frees memory
1594 void wxArrayString::Clear()
1595 {
1596   Free();
1597
1598   m_nSize  =
1599   m_nCount = 0;
1600
1601   wxDELETEA(m_pItems);
1602 }
1603
1604 // dtor
1605 wxArrayString::~wxArrayString()
1606 {
1607   Free();
1608
1609   wxDELETEA(m_pItems);
1610 }
1611
1612 // pre-allocates memory (frees the previous data!)
1613 void wxArrayString::Alloc(size_t nSize)
1614 {
1615   wxASSERT( nSize > 0 );
1616
1617   // only if old buffer was not big enough
1618   if ( nSize > m_nSize ) {
1619     Free();
1620     wxDELETEA(m_pItems);
1621     m_pItems = new wxChar *[nSize];
1622     m_nSize  = nSize;
1623   }
1624
1625   m_nCount = 0;
1626 }
1627
1628 // minimizes the memory usage by freeing unused memory
1629 void wxArrayString::Shrink()
1630 {
1631   // only do it if we have some memory to free
1632   if( m_nCount < m_nSize ) {
1633     // allocates exactly as much memory as we need
1634     wxChar **pNew = new wxChar *[m_nCount];
1635
1636     // copy data to new location
1637     memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *));
1638     delete [] m_pItems;
1639     m_pItems = pNew;
1640   }
1641 }
1642
1643 // searches the array for an item (forward or backwards)
1644 int wxArrayString::Index(const wxChar *sz, bool bCase, bool bFromEnd) const
1645 {
1646   if ( bFromEnd ) {
1647     if ( m_nCount > 0 ) {
1648       size_t ui = m_nCount;
1649       do {
1650         if ( STRING(m_pItems[--ui])->IsSameAs(sz, bCase) )
1651           return ui;
1652       }
1653       while ( ui != 0 );
1654     }
1655   }
1656   else {
1657     for( size_t ui = 0; ui < m_nCount; ui++ ) {
1658       if( STRING(m_pItems[ui])->IsSameAs(sz, bCase) )
1659         return ui;
1660     }
1661   }
1662
1663   return wxNOT_FOUND;
1664 }
1665
1666 // add item at the end
1667 void wxArrayString::Add(const wxString& str)
1668 {
1669   wxASSERT( str.GetStringData()->IsValid() );
1670
1671   Grow();
1672
1673   // the string data must not be deleted!
1674   str.GetStringData()->Lock();
1675   m_pItems[m_nCount++] = (wxChar *)str.c_str();
1676 }
1677
1678 // add item at the given position
1679 void wxArrayString::Insert(const wxString& str, size_t nIndex)
1680 {
1681   wxASSERT( str.GetStringData()->IsValid() );
1682
1683   wxCHECK_RET( nIndex <= m_nCount, _("bad index in wxArrayString::Insert") );
1684
1685   Grow();
1686
1687   memmove(&m_pItems[nIndex + 1], &m_pItems[nIndex],
1688           (m_nCount - nIndex)*sizeof(wxChar *));
1689
1690   str.GetStringData()->Lock();
1691   m_pItems[nIndex] = (wxChar *)str.c_str();
1692
1693   m_nCount++;
1694 }
1695
1696 // removes item from array (by index)
1697 void wxArrayString::Remove(size_t nIndex)
1698 {
1699   wxCHECK_RET( nIndex <= m_nCount, _("bad index in wxArrayString::Remove") );
1700
1701   // release our lock
1702   Item(nIndex).GetStringData()->Unlock();
1703
1704   memmove(&m_pItems[nIndex], &m_pItems[nIndex + 1],
1705           (m_nCount - nIndex - 1)*sizeof(wxChar *));
1706   m_nCount--;
1707 }
1708
1709 // removes item from array (by value)
1710 void wxArrayString::Remove(const wxChar *sz)
1711 {
1712   int iIndex = Index(sz);
1713
1714   wxCHECK_RET( iIndex != wxNOT_FOUND,
1715                _("removing inexistent element in wxArrayString::Remove") );
1716
1717   Remove(iIndex);
1718 }
1719
1720 // ----------------------------------------------------------------------------
1721 // sorting
1722 // ----------------------------------------------------------------------------
1723
1724 // we can only sort one array at a time with the quick-sort based
1725 // implementation
1726 #if wxUSE_THREADS
1727   // need a critical section to protect access to gs_compareFunction and
1728   // gs_sortAscending variables
1729   static wxCriticalSection *gs_critsectStringSort = NULL;
1730
1731   // call this before the value of the global sort vars is changed/after
1732   // you're finished with them
1733   #define START_SORT()     wxASSERT( !gs_critsectStringSort );                \
1734                            gs_critsectStringSort = new wxCriticalSection;     \
1735                            gs_critsectStringSort->Enter()
1736   #define END_SORT()       gs_critsectStringSort->Leave();                    \
1737                            delete gs_critsectStringSort;                      \
1738                            gs_critsectStringSort = NULL
1739 #else // !threads
1740   #define START_SORT()
1741   #define END_SORT()
1742 #endif // wxUSE_THREADS
1743
1744 // function to use for string comparaison
1745 static wxArrayString::CompareFunction gs_compareFunction = NULL;
1746
1747 // if we don't use the compare function, this flag tells us if we sort the
1748 // array in ascending or descending order
1749 static bool gs_sortAscending = TRUE;
1750
1751 // function which is called by quick sort
1752 static int wxStringCompareFunction(const void *first, const void *second)
1753 {
1754   wxString *strFirst = (wxString *)first;
1755   wxString *strSecond = (wxString *)second;
1756
1757   if ( gs_compareFunction ) {
1758     return gs_compareFunction(*strFirst, *strSecond);
1759   }
1760   else {
1761     // maybe we should use wxStrcoll
1762     int result = wxStrcmp(strFirst->c_str(), strSecond->c_str());
1763
1764     return gs_sortAscending ? result : -result;
1765   }
1766 }
1767
1768 // sort array elements using passed comparaison function
1769 void wxArrayString::Sort(CompareFunction compareFunction)
1770 {
1771   START_SORT();
1772
1773   wxASSERT( !gs_compareFunction );  // must have been reset to NULL
1774   gs_compareFunction = compareFunction;
1775
1776   DoSort();
1777
1778   END_SORT();
1779 }
1780
1781 void wxArrayString::Sort(bool reverseOrder)
1782 {
1783   START_SORT();
1784
1785   wxASSERT( !gs_compareFunction );  // must have been reset to NULL
1786   gs_sortAscending = !reverseOrder;
1787
1788   DoSort();
1789
1790   END_SORT();
1791 }
1792
1793 void wxArrayString::DoSort()
1794 {
1795   // just sort the pointers using qsort() - of course it only works because
1796   // wxString() *is* a pointer to its data
1797   qsort(m_pItems, m_nCount, sizeof(wxChar *), wxStringCompareFunction);
1798 }
1799
1800 // ============================================================================
1801 // MBConv
1802 // ============================================================================
1803
1804 #if wxUSE_WCHAR_T
1805 WXDLLEXPORT_DATA(wxMBConv *) wxConv_current = &wxConv_libc;
1806
1807 // ----------------------------------------------------------------------------
1808 // standard libc conversion
1809 // ----------------------------------------------------------------------------
1810
1811 WXDLLEXPORT_DATA(wxMBConv) wxConv_libc;
1812
1813 size_t wxMBConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1814 {
1815   return wxMB2WC(buf, psz, n);
1816 }
1817
1818 size_t wxMBConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1819 {
1820   return wxWC2MB(buf, psz, n);
1821 }
1822
1823 // ----------------------------------------------------------------------------
1824 // standard file conversion
1825 // ----------------------------------------------------------------------------
1826
1827 WXDLLEXPORT_DATA(wxMBConvFile) wxConvFile;
1828
1829 // just use the libc conversion for now
1830 size_t wxMBConvFile::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1831 {
1832   return wxMB2WC(buf, psz, n);
1833 }
1834
1835 size_t wxMBConvFile::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1836 {
1837   return wxWC2MB(buf, psz, n);
1838 }
1839
1840 // ----------------------------------------------------------------------------
1841 // standard gdk conversion
1842 // ----------------------------------------------------------------------------
1843
1844 #ifdef __WXGTK12__
1845 WXDLLEXPORT_DATA(wxMBConvGdk) wxConvGdk;
1846
1847 #include <gdk/gdk.h>
1848
1849 size_t wxMBConvGdk::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1850 {
1851   if (buf) {
1852     return gdk_mbstowcs((GdkWChar *)buf, psz, n);
1853   } else {
1854     GdkWChar *nbuf = new GdkWChar[n=strlen(psz)];
1855     size_t len = gdk_mbstowcs(nbuf, psz, n);
1856     delete [] nbuf;
1857     return len;
1858   }
1859 }
1860
1861 size_t wxMBConvGdk::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1862 {
1863   char *mbstr = gdk_wcstombs((GdkWChar *)psz);
1864   size_t len = mbstr ? strlen(mbstr) : 0;
1865   if (buf) {
1866     if (len > n) len = n;
1867     memcpy(buf, psz, len);
1868     if (len < n) buf[len] = 0;
1869   }
1870   return len;
1871 }
1872 #endif // GTK > 1.0
1873
1874 // ----------------------------------------------------------------------------
1875 // UTF-7
1876 // ----------------------------------------------------------------------------
1877
1878 WXDLLEXPORT_DATA(wxMBConvUTF7) wxConvUTF7;
1879
1880 #if 0
1881 static char utf7_setD[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1882                         "abcdefghijklmnopqrstuvwxyz"
1883                         "0123456789'(),-./:?";
1884 static char utf7_setO[]="!\"#$%&*;<=>@[]^_`{|}";
1885 static char utf7_setB[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1886                         "abcdefghijklmnopqrstuvwxyz"
1887                         "0123456789+/";
1888 #endif
1889
1890 // TODO: write actual implementations of UTF-7 here
1891 size_t wxMBConvUTF7::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1892 {
1893   return 0;
1894 }
1895
1896 size_t wxMBConvUTF7::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1897 {
1898   return 0;
1899 }
1900
1901 // ----------------------------------------------------------------------------
1902 // UTF-8
1903 // ----------------------------------------------------------------------------
1904
1905 WXDLLEXPORT_DATA(wxMBConvUTF8) wxConvUTF8;
1906
1907 static unsigned long utf8_max[]={0x7f,0x7ff,0xffff,0x1fffff,0x3ffffff,0x7fffffff,0xffffffff};
1908
1909 size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1910 {
1911   size_t len = 0;
1912
1913   while (*psz && ((!buf) || (len<n))) {
1914     unsigned char cc=*psz++, fc=cc;
1915     unsigned cnt;
1916     for (cnt=0; fc&0x80; cnt++) fc<<=1;
1917     if (!cnt) {
1918       // plain ASCII char
1919       if (buf) *buf++=cc;
1920       len++;
1921     } else {
1922       cnt--;
1923       if (!cnt) {
1924         // invalid UTF-8 sequence
1925         return (size_t)-1;
1926       } else {
1927         unsigned ocnt=cnt-1;
1928         unsigned long res=cc&(0x3f>>cnt);
1929         while (cnt--) {
1930           cc = *psz++;
1931           if ((cc&0xC0)!=0x80) {
1932             // invalid UTF-8 sequence
1933             return (size_t)-1;
1934           }
1935           res=(res<<6)|(cc&0x3f);
1936         }
1937         if (res<=utf8_max[ocnt]) {
1938           // illegal UTF-8 encoding
1939           return (size_t)-1;
1940         }
1941         if (buf) *buf++=res;
1942         len++;
1943       }
1944     }
1945   }
1946   if (buf && (len<n)) *buf = 0;
1947   return len;
1948 }
1949
1950 size_t wxMBConvUTF8::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1951 {
1952   size_t len = 0;
1953
1954   while (*psz && ((!buf) || (len<n))) {
1955     unsigned long cc=(*psz++)&0x7fffffff;
1956     unsigned cnt;
1957     for (cnt=0; cc>utf8_max[cnt]; cnt++);
1958     if (!cnt) {
1959       // plain ASCII char
1960       if (buf) *buf++=cc;
1961       len++;
1962     } else {
1963       len+=cnt+1;
1964       if (buf) {
1965         *buf++=(-128>>cnt)|((cc>>(cnt*6))&(0x3f>>cnt));
1966         while (cnt--)
1967           *buf++=0x80|((cc>>(cnt*6))&0x3f);
1968       }
1969     }
1970   }
1971   if (buf && (len<n)) *buf = 0;
1972   return len;
1973 }
1974
1975 // ----------------------------------------------------------------------------
1976 // specified character set
1977 // ----------------------------------------------------------------------------
1978
1979 class wxCharacterSet
1980 {
1981 public:
1982   wxArrayString names;
1983   wchar_t *data;
1984 };
1985
1986 #ifndef WX_PRECOMP
1987   #include "wx/dynarray.h"
1988   #include "wx/filefn.h"
1989   #include "wx/textfile.h"
1990   #include "wx/tokenzr.h"
1991   #include "wx/utils.h"
1992 #endif
1993
1994 WX_DECLARE_OBJARRAY(wxCharacterSet, wxCSArray);
1995 #include "wx/arrimpl.cpp"
1996 WX_DEFINE_OBJARRAY(wxCSArray);
1997
1998 static wxCSArray wxCharsets;
1999
2000 static void wxLoadCharacterSets(void)
2001 {
2002   static bool already_loaded = FALSE;
2003
2004   if (already_loaded) return;
2005
2006   already_loaded = TRUE;
2007 #if defined(__UNIX__)
2008   // search through files in /usr/share/i18n/charmaps
2009   wxString fname;
2010   for (fname = ::wxFindFirstFile(_T("/usr/share/i18n/charmaps/*"));
2011        !fname.IsEmpty();
2012        fname = ::wxFindNextFile()) {
2013     wxTextFile cmap(fname);
2014     if (cmap.Open()) {
2015       wxCharacterSet *cset = new wxCharacterSet;
2016       wxString comchar,escchar;
2017       bool in_charset = FALSE;
2018
2019       // wxFprintf(stderr,_T("Loaded: %s\n"),fname.c_str());
2020
2021       wxString line;
2022       for (line = cmap.GetFirstLine();
2023            !cmap.Eof();
2024            line = cmap.GetNextLine()) {
2025         // wxFprintf(stderr,_T("line contents: %s\n"),line.c_str());
2026         wxStringTokenizer token(line);
2027         wxString cmd = token.GetNextToken();
2028         if (cmd == comchar) {
2029           if (token.GetNextToken() == _T("alias"))
2030             cset->names.Add(token.GetNextToken());
2031         }
2032         else if (cmd == _T("<code_set_name>"))
2033           cset->names.Add(token.GetNextToken());
2034         else if (cmd == _T("<comment_char>"))
2035           comchar = token.GetNextToken();
2036         else if (cmd == _T("<escape_char>"))
2037           escchar = token.GetNextToken();
2038         else if (cmd == _T("<mb_cur_min>")) {
2039           delete cset;
2040           cset = (wxCharacterSet *) NULL;
2041           break; // we don't support multibyte charsets ourselves (yet)
2042         }
2043         else if (cmd == _T("CHARMAP")) {
2044           cset->data = (wchar_t *)calloc(256, sizeof(wchar_t));
2045           in_charset = TRUE;
2046         }
2047         else if (cmd == _T("END")) {
2048           if (token.GetNextToken() == _T("CHARMAP"))
2049             in_charset = FALSE;
2050         }
2051         else if (in_charset) {
2052           // format: <NUL> /x00 <U0000> NULL (NUL)
2053           //         <A>   /x41 <U0041> LATIN CAPITAL LETTER A
2054           wxString hex = token.GetNextToken();
2055           // skip whitespace (why doesn't wxStringTokenizer do this?)
2056           while (wxIsEmpty(hex) && token.HasMoreTokens()) hex = token.GetNextToken();
2057           wxString uni = token.GetNextToken();
2058           // skip whitespace again
2059           while (wxIsEmpty(uni) && token.HasMoreTokens()) uni = token.GetNextToken();
2060
2061           if ((hex.Len() > 2) && (hex.GetChar(0) == escchar) && (hex.GetChar(1) == _T('x')) &&
2062               (uni.Left(2) == _T("<U"))) {
2063             hex.MakeUpper(); uni.MakeUpper();
2064             int pos = ::wxHexToDec(hex.Mid(2,2));
2065             if (pos>=0) {
2066               unsigned long uni1 = ::wxHexToDec(uni.Mid(2,2));
2067               unsigned long uni2 = ::wxHexToDec(uni.Mid(4,2));
2068               cset->data[pos] = (uni1 << 16) | uni2;
2069               // wxFprintf(stderr,_T("char %02x mapped to %04x (%c)\n"),pos,cset->data[pos],cset->data[pos]);
2070             }
2071           }
2072         }
2073       }
2074       if (cset) {
2075         cset->names.Shrink();
2076         wxCharsets.Add(cset);
2077       }
2078     }
2079   }
2080 #endif
2081   wxCharsets.Shrink();
2082 }
2083
2084 static wxCharacterSet *wxFindCharacterSet(const wxChar *charset)
2085 {
2086   if (!charset) return (wxCharacterSet *)NULL;
2087   wxLoadCharacterSets();
2088   for (size_t n=0; n<wxCharsets.GetCount(); n++)
2089     if (wxCharsets[n].names.Index(charset) != wxNOT_FOUND)
2090       return &(wxCharsets[n]);
2091   return (wxCharacterSet *)NULL;
2092 }
2093
2094 WXDLLEXPORT_DATA(wxCSConv) wxConvLocal((const wxChar *)NULL);
2095
2096 wxCSConv::wxCSConv(const wxChar *charset)
2097 {
2098   m_name = (wxChar *) NULL;
2099   m_cset = (wxCharacterSet *) NULL;
2100   m_deferred = TRUE;
2101   SetName(charset);
2102 }
2103
2104 wxCSConv::~wxCSConv()
2105 {
2106   if (m_name) free(m_name);
2107 }
2108
2109 void wxCSConv::SetName(const wxChar *charset)
2110 {
2111   if (charset) {
2112 #ifdef __UNIX__
2113     // first, convert the character set name to standard form
2114     wxString codeset;
2115     if (wxString(charset,3).CmpNoCase(_T("ISO")) == 0) {
2116       // make sure it's represented in the standard form: ISO_8859-1
2117       codeset = _T("ISO_");
2118       charset += 3;
2119       if ((*charset == _T('-')) || (*charset == _T('_'))) charset++;
2120       if (wxStrlen(charset)>4) {
2121         if (wxString(charset,4) == _T("8859")) {
2122           codeset << _T("8859-");
2123           if (*charset == _T('-')) charset++;
2124         }
2125       }
2126     }
2127     codeset << charset;
2128     codeset.MakeUpper();
2129     m_name = wxStrdup(codeset.c_str());
2130     m_deferred = TRUE;
2131 #endif
2132   }
2133 }
2134
2135 void wxCSConv::LoadNow()
2136 {
2137 //  wxPrintf(_T("Conversion request\n"));
2138   if (m_deferred) {
2139     if (!m_name) {
2140 #ifdef __UNIX__
2141       wxChar *lang = wxGetenv(_T("LANG"));
2142       wxChar *dot = lang ? wxStrchr(lang, _T('.')) : (wxChar *)NULL;
2143       if (dot) SetName(dot+1);
2144 #endif
2145     }
2146     m_cset = wxFindCharacterSet(m_name);
2147     m_deferred = FALSE;
2148   }
2149 }
2150
2151 size_t wxCSConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
2152 {
2153   ((wxCSConv *)this)->LoadNow(); // discard constness
2154   if (buf) {
2155     if (m_cset) {
2156       for (size_t c=0; c<n; c++)
2157         buf[c] = m_cset->data[(unsigned char)(psz[c])];
2158     } else {
2159       // latin-1 (direct)
2160       for (size_t c=0; c<n; c++)
2161         buf[c] = (unsigned char)(psz[c]);
2162     }
2163     return n;
2164   }
2165   return strlen(psz);
2166 }
2167
2168 size_t wxCSConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
2169 {
2170   ((wxCSConv *)this)->LoadNow(); // discard constness
2171   if (buf) {
2172     if (m_cset) {
2173       for (size_t c=0; c<n; c++) {
2174         size_t n;
2175         for (n=0; (n<256) && (m_cset->data[n] != psz[c]); n++);
2176         buf[c] = (n>0xff) ? '?' : n;
2177       }
2178     } else {
2179       // latin-1 (direct)
2180       for (size_t c=0; c<n; c++)
2181         buf[c] = (psz[c]>0xff) ? '?' : psz[c];
2182     }
2183     return n;
2184   }
2185   return wcslen(psz);
2186 }
2187
2188 #endif//wxUSE_WCHAR_T