include/wx/string.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        string.h
   3 // Purpose:     wxString and wxArrayString classes
   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 licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 /*
  13     Efficient string class [more or less] compatible with MFC CString,
  14     wxWindows version 1 wxString and std::string and some handy functions
  15     missing from string.h.
  16 */
  17
  18 #ifndef _WX_WXSTRINGH__
  19 #define _WX_WXSTRINGH__
  20
  21 #if defined(__GNUG__) && !defined(__APPLE__)
  22     #pragma interface "string.h"
  23 #endif
  24
  25 // ----------------------------------------------------------------------------
  26 // conditinal compilation
  27 // ----------------------------------------------------------------------------
  28
  29 // compile the std::string compatibility functions if defined
  30 #define   wxSTD_STRING_COMPATIBILITY
  31
  32 // ----------------------------------------------------------------------------
  33 // headers
  34 // ----------------------------------------------------------------------------
  35
  36 #include "wx/defs.h"        // everybody should include this
  37
  38 #if defined(__WXMAC__) || defined(__VISAGECPP__)
  39     #include <ctype.h>
  40 #endif
  41
  42 #ifdef __EMX__
  43     #include <std.h>
  44 #endif
  45
  46 #if defined(__VISAGECPP__) && __IBMCPP__ >= 400
  47    // problem in VACPP V4 with including stdlib.h multiple times
  48    // strconv includes it anyway
  49 #  include <stdio.h>
  50 #  include <string.h>
  51 #  include <stdarg.h>
  52 #  include <limits.h>
  53 #else
  54 #  include <string.h>
  55 #  include <stdio.h>
  56 #  include <stdarg.h>
  57 #  include <limits.h>
  58 #  include <stdlib.h>
  59 #endif
  60
  61 #ifdef HAVE_STRINGS_H
  62     #include <strings.h>    // for strcasecmp()
  63 #endif // HAVE_STRINGS_H
  64
  65 #include "wx/wxchar.h"      // for wxChar
  66 #include "wx/buffer.h"      // for wxCharBuffer
  67 #include "wx/strconv.h"     // for wxConvertXXX() macros and wxMBConv classes
  68
  69 // ---------------------------------------------------------------------------
  70 // macros
  71 // ---------------------------------------------------------------------------
  72
  73 // casts [unfortunately!] needed to call some broken functions which require
  74 // "char *" instead of "const char *"
  75 #define   WXSTRINGCAST (wxChar *)(const wxChar *)
  76 #define   wxCSTRINGCAST (wxChar *)(const wxChar *)
  77 #define   wxMBSTRINGCAST (char *)(const char *)
  78 #define   wxWCSTRINGCAST (wchar_t *)(const wchar_t *)
  79
  80 // implementation only
  81 #define   wxASSERT_VALID_INDEX(i) \
  82     wxASSERT_MSG( (size_t)(i) <= Len(), _T("invalid index in wxString") )
  83
  84 // ----------------------------------------------------------------------------
  85 // constants
  86 // ----------------------------------------------------------------------------
  87
  88 #if defined(__VISAGECPP__) && __IBMCPP__ >= 400
  89 // must define this static for VA or else you get multiply defined symbols everywhere
  90 extern const unsigned int wxSTRING_MAXLEN;
  91
  92 #else
  93 // maximum possible length for a string means "take all string" everywhere
  94 //  (as sizeof(StringData) is unknown here, we substract 100)
  95 const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100;
  96
  97 #endif
  98
  99 // ----------------------------------------------------------------------------
 100 // global data
 101 // ----------------------------------------------------------------------------
 102
 103 // global pointer to empty string
 104 extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxEmptyString;
 105
 106 // ---------------------------------------------------------------------------
 107 // global functions complementing standard C string library replacements for
 108 // strlen() and portable strcasecmp()
 109 //---------------------------------------------------------------------------
 110
 111 // Use wxXXX() functions from wxchar.h instead! These functions are for
 112 // backwards compatibility only.
 113
 114 // checks whether the passed in pointer is NULL and if the string is empty
 115 inline bool IsEmpty(const char *p) { return (!p || !*p); }
 116
 117 // safe version of strlen() (returns 0 if passed NULL pointer)
 118 inline size_t Strlen(const char *psz)
 119   { return psz ? strlen(psz) : 0; }
 120
 121 // portable strcasecmp/_stricmp
 122 inline int Stricmp(const char *psz1, const char *psz2)
 123 {
 124 #if defined(__VISUALC__) && defined(__WXWINCE__)
 125   register char c1, c2;
 126   do {
 127     c1 = tolower(*psz1++);
 128     c2 = tolower(*psz2++);
 129   } while ( c1 && (c1 == c2) );
 130
 131   return c1 - c2;
 132 #elif defined(__VISUALC__) || ( defined(__MWERKS__) && defined(__INTEL__) )
 133   return _stricmp(psz1, psz2);
 134 #elif defined(__SC__)
 135   return _stricmp(psz1, psz2);
 136 #elif defined(__SALFORDC__)
 137   return stricmp(psz1, psz2);
 138 #elif defined(__BORLANDC__)
 139   return stricmp(psz1, psz2);
 140 #elif defined(__WATCOMC__)
 141   return stricmp(psz1, psz2);
 142 #elif defined(__DJGPP__)
 143   return stricmp(psz1, psz2);
 144 #elif defined(__EMX__)
 145   return stricmp(psz1, psz2);
 146 #elif defined(__WXPM__)
 147   return stricmp(psz1, psz2);
 148 #elif defined(__UNIX__) || defined(__GNUWIN32__)
 149   return strcasecmp(psz1, psz2);
 150 #elif defined(__MWERKS__) && !defined(__INTEL__)
 151   register char c1, c2;
 152   do {
 153     c1 = tolower(*psz1++);
 154     c2 = tolower(*psz2++);
 155   } while ( c1 && (c1 == c2) );
 156
 157   return c1 - c2;
 158 #else
 159   // almost all compilers/libraries provide this function (unfortunately under
 160   // different names), that's why we don't implement our own which will surely
 161   // be more efficient than this code (uncomment to use):
 162   /*
 163     register char c1, c2;
 164     do {
 165       c1 = tolower(*psz1++);
 166       c2 = tolower(*psz2++);
 167     } while ( c1 && (c1 == c2) );
 168
 169     return c1 - c2;
 170   */
 171
 172   #error  "Please define string case-insensitive compare for your OS/compiler"
 173 #endif  // OS/compiler
 174 }
 175
 176 // return an empty wxString
 177 class WXDLLIMPEXP_BASE wxString; // not yet defined
 178 inline const wxString& wxGetEmptyString() { return *(wxString *)&wxEmptyString; }
 179
 180 // ---------------------------------------------------------------------------
 181 // string data prepended with some housekeeping info (used by wxString class),
 182 // is never used directly (but had to be put here to allow inlining)
 183 // ---------------------------------------------------------------------------
 184
 185 struct WXDLLIMPEXP_BASE wxStringData
 186 {
 187   int     nRefs;        // reference count
 188   size_t  nDataLength,  // actual string length
 189           nAllocLength; // allocated memory size
 190
 191   // mimics declaration 'wxChar data[nAllocLength]'
 192   wxChar* data() const { return (wxChar*)(this + 1); }
 193
 194   // empty string has a special ref count so it's never deleted
 195   bool  IsEmpty()   const { return (nRefs == -1); }
 196   bool  IsShared()  const { return (nRefs > 1);   }
 197
 198   // lock/unlock
 199   void  Lock()   { if ( !IsEmpty() ) nRefs++;                    }
 200
 201   // VC++ will refuse to inline Unlock but profiling shows that it is wrong
 202 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
 203   __forceinline
 204 #endif
 205   // VC++ free must take place in same DLL as allocation when using non dll
 206   // run-time library (e.g. Multithreaded instead of Multithreaded DLL)
 207 #if defined(__VISUALC__) && defined(_MT) && !defined(_DLL)
 208   void  Unlock() { if ( !IsEmpty() && --nRefs == 0) Free();  }
 209   // we must not inline deallocation since allocation is not inlined
 210   void  Free();
 211 #else
 212   void  Unlock() { if ( !IsEmpty() && --nRefs == 0) free(this);  }
 213 #endif
 214
 215   // if we had taken control over string memory (GetWriteBuf), it's
 216   // intentionally put in invalid state
 217   void  Validate(bool b)  { nRefs = (b ? 1 : 0); }
 218   bool  IsValid() const   { return (nRefs != 0); }
 219 };
 220
 221 // ---------------------------------------------------------------------------
 222 // This is (yet another one) String class for C++ programmers. It doesn't use
 223 // any of "advanced" C++ features (i.e. templates, exceptions, namespaces...)
 224 // thus you should be able to compile it with practicaly any C++ compiler.
 225 // This class uses copy-on-write technique, i.e. identical strings share the
 226 // same memory as long as neither of them is changed.
 227 //
 228 // This class aims to be as compatible as possible with the new standard
 229 // std::string class, but adds some additional functions and should be at
 230 // least as efficient than the standard implementation.
 231 //
 232 // Performance note: it's more efficient to write functions which take "const
 233 // String&" arguments than "const char *" if you assign the argument to
 234 // another string.
 235 //
 236 // It was compiled and tested under Win32, Linux (libc 5 & 6), Solaris 5.5.
 237 //
 238 // To do:
 239 //  - ressource support (string tables in ressources)
 240 //  - more wide character (UNICODE) support
 241 //  - regular expressions support
 242 // ---------------------------------------------------------------------------
 243
 244 class WXDLLIMPEXP_BASE wxString
 245 {
 246 #if !wxUSE_STL
 247 friend class WXDLLIMPEXP_BASE wxArrayString;
 248 #endif
 249
 250   // NB: special care was taken in arranging the member functions in such order
 251   //     that all inline functions can be effectively inlined, verify that all
 252   //     performace critical functions are still inlined if you change order!
 253 private:
 254   // points to data preceded by wxStringData structure with ref count info
 255   wxChar *m_pchData;
 256
 257   // accessor to string data
 258   wxStringData* GetStringData() const { return (wxStringData*)m_pchData - 1; }
 259
 260   // string (re)initialization functions
 261     // initializes the string to the empty value (must be called only from
 262     // ctors, use Reinit() otherwise)
 263   void Init() { m_pchData = (wxChar *)wxEmptyString; }
 264     // initializaes the string with (a part of) C-string
 265   void InitWith(const wxChar *psz, size_t nPos = 0, size_t nLen = wxSTRING_MAXLEN);
 266     // as Init, but also frees old data
 267   void Reinit() { GetStringData()->Unlock(); Init(); }
 268
 269   // memory allocation
 270     // allocates memory for string of length nLen
 271   bool AllocBuffer(size_t nLen);
 272     // copies data to another string
 273   bool AllocCopy(wxString&, int, int) const;
 274     // effectively copies data to string
 275   bool AssignCopy(size_t, const wxChar *);
 276
 277   // append a (sub)string
 278   bool ConcatSelf(size_t nLen, const wxChar *src);
 279
 280   // functions called before writing to the string: they copy it if there
 281   // are other references to our data (should be the only owner when writing)
 282   bool CopyBeforeWrite();
 283   bool AllocBeforeWrite(size_t);
 284
 285   // if we hadn't made these operators private, it would be possible to
 286   // compile "wxString s; s = 17;" without any warnings as 17 is implicitly
 287   // converted to char in C and we do have operator=(char)
 288   //
 289   // NB: we don't need other versions (short/long and unsigned) as attempt
 290   //     to assign another numeric type to wxString will now result in
 291   //     ambiguity between operator=(char) and operator=(int)
 292   wxString& operator=(int);
 293
 294   // these methods are not implemented - there is _no_ conversion from int to
 295   // string, you're doing something wrong if the compiler wants to call it!
 296   //
 297   // try `s << i' or `s.Printf("%d", i)' instead
 298   wxString(int);
 299
 300 public:
 301   // constructors and destructor
 302     // ctor for an empty string
 303   wxString() : m_pchData(NULL) { Init(); }
 304     // copy ctor
 305   wxString(const wxString& stringSrc) : m_pchData(NULL)
 306   {
 307     wxASSERT_MSG( stringSrc.GetStringData()->IsValid(),
 308                   _T("did you forget to call UngetWriteBuf()?") );
 309
 310     if ( stringSrc.IsEmpty() ) {
 311       // nothing to do for an empty string
 312       Init();
 313     }
 314     else {
 315       m_pchData = stringSrc.m_pchData;            // share same data
 316       GetStringData()->Lock();                    // => one more copy
 317     }
 318   }
 319     // string containing nRepeat copies of ch
 320   wxString(wxChar ch, size_t nRepeat = 1);
 321     // ctor takes first nLength characters from C string
 322     // (default value of wxSTRING_MAXLEN means take all the string)
 323   wxString(const wxChar *psz, size_t nLength = wxSTRING_MAXLEN)
 324       : m_pchData(NULL)
 325       { InitWith(psz, 0, nLength); }
 326   wxString(const wxChar *psz, wxMBConv& WXUNUSED(conv), size_t nLength = wxSTRING_MAXLEN)
 327       : m_pchData(NULL)
 328       { InitWith(psz, 0, nLength); }
 329
 330 #if wxUSE_UNICODE
 331     // from multibyte string
 332     // (NB: nLength is right now number of Unicode characters, not
 333     //  characters in psz! So try not to use it yet!)
 334   wxString(const char *psz, wxMBConv& conv, size_t nLength = wxSTRING_MAXLEN);
 335     // from wxWCharBuffer (i.e. return from wxGetString)
 336   wxString(const wxWCharBuffer& psz)
 337     { InitWith(psz, 0, wxSTRING_MAXLEN); }
 338 #else // ANSI
 339     // from C string (for compilers using unsigned char)
 340   wxString(const unsigned char* psz, size_t nLength = wxSTRING_MAXLEN)
 341       : m_pchData(NULL)
 342       { InitWith((const char*)psz, 0, nLength); }
 343
 344 #if wxUSE_WCHAR_T
 345     // from wide (Unicode) string
 346   wxString(const wchar_t *pwz, wxMBConv& conv = wxConvLibc, size_t nLength = wxSTRING_MAXLEN);
 347 #endif // !wxUSE_WCHAR_T
 348
 349     // from wxCharBuffer
 350   wxString(const wxCharBuffer& psz)
 351       : m_pchData(NULL)
 352       { InitWith(psz, 0, wxSTRING_MAXLEN); }
 353 #endif // Unicode/ANSI
 354
 355     // dtor is not virtual, this class must not be inherited from!
 356  ~wxString() { GetStringData()->Unlock(); }
 357
 358   // generic attributes & operations
 359     // as standard strlen()
 360   size_t Len() const { return GetStringData()->nDataLength; }
 361     // string contains any characters?
 362   bool IsEmpty() const { return Len() == 0; }
 363     // empty string is "FALSE", so !str will return TRUE
 364   bool operator!() const { return IsEmpty(); }
 365     // truncate the string to given length
 366   wxString& Truncate(size_t uiLen);
 367     // empty string contents
 368   void Empty()
 369   {
 370     Truncate(0);
 371
 372     wxASSERT_MSG( IsEmpty(), _T("string not empty after call to Empty()?") );
 373   }
 374     // empty the string and free memory
 375   void Clear()
 376   {
 377     if ( !GetStringData()->IsEmpty() )
 378       Reinit();
 379
 380     wxASSERT_MSG( !GetStringData()->nDataLength &&
 381                   !GetStringData()->nAllocLength,
 382                   _T("string should be empty after Clear()") );
 383   }
 384
 385   // contents test
 386     // Is an ascii value
 387   bool IsAscii() const;
 388     // Is a number
 389   bool IsNumber() const;
 390     // Is a word
 391   bool IsWord() const;
 392
 393   // data access (all indexes are 0 based)
 394     // read access
 395     wxChar  GetChar(size_t n) const
 396       { wxASSERT_VALID_INDEX( n );  return m_pchData[n]; }
 397     // read/write access
 398     wxChar& GetWritableChar(size_t n)
 399       { wxASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 400     // write access
 401     void  SetChar(size_t n, wxChar ch)
 402       { wxASSERT_VALID_INDEX( n ); CopyBeforeWrite(); m_pchData[n] = ch; }
 403
 404     // get last character
 405     wxChar  Last() const
 406       {
 407           wxASSERT_MSG( !IsEmpty(), _T("wxString: index out of bounds") );
 408
 409           return m_pchData[Len() - 1];
 410       }
 411
 412     // get writable last character
 413     wxChar& Last()
 414       {
 415           wxASSERT_MSG( !IsEmpty(), _T("wxString: index out of bounds") );
 416           CopyBeforeWrite();
 417           return m_pchData[Len()-1];
 418       }
 419
 420     /*
 421         So why do we have all these overloaded operator[]s? A bit of history:
 422         initially there was only one of them, taking size_t. Then people
 423         started complaining because they wanted to use ints as indices (I
 424         wonder why) and compilers were giving warnings about it, so we had to
 425         add the operator[](int). Then it became apparent that you couldn't
 426         write str[0] any longer because there was ambiguity between two
 427         overloads and so you now had to write str[0u] (or, of course, use the
 428         explicit casts to either int or size_t but nobody did this).
 429
 430         Finally, someone decided to compile wxWin on an Alpha machine and got
 431         a surprize: str[0u] didn't compile there because it is of type
 432         unsigned int and size_t is unsigned _long_ on Alpha and so there was
 433         ambiguity between converting uint to int or ulong. To fix this one we
 434         now add operator[](uint) for the machines where size_t is not already
 435         the same as unsigned int - hopefully this fixes the problem (for some
 436         time)
 437
 438         The only real fix is, of course, to remove all versions but the one
 439         taking size_t...
 440      */
 441
 442     // operator version of GetChar
 443     wxChar  operator[](size_t n) const
 444       { wxASSERT_VALID_INDEX( n ); return m_pchData[n]; }
 445
 446     // operator version of GetChar
 447     wxChar  operator[](int n) const
 448       { wxASSERT_VALID_INDEX( n ); return m_pchData[n]; }
 449
 450     // operator version of GetWriteableChar
 451     wxChar& operator[](size_t n)
 452       { wxASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 453
 454 #ifndef wxSIZE_T_IS_UINT
 455     // operator version of GetChar
 456     wxChar operator[](unsigned int n) const
 457       { wxASSERT_VALID_INDEX( n ); return m_pchData[n]; }
 458
 459     // operator version of GetWriteableChar
 460     wxChar& operator[](unsigned int n)
 461       { wxASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 462 #endif // size_t != unsigned int
 463
 464     // implicit conversion to C string
 465     operator const wxChar*() const { return m_pchData; }
 466
 467     // explicit conversion to C string (use this with printf()!)
 468     const wxChar* c_str()   const { return m_pchData; }
 469     // identical to c_str(), for wxWin 1.6x compatibility
 470     const wxChar* wx_str()  const { return m_pchData; }
 471     // identical to c_str(), for MFC compatibility
 472     const wxChar* GetData() const { return m_pchData; }
 473
 474     // conversion to/from plain (i.e. 7 bit) ASCII: this is useful for
 475     // converting numbers or strings which are certain not to contain special
 476     // chars (typically system functions, X atoms, environment variables etc.)
 477     //
 478     // the behaviour of these functions with the strings containing anything
 479     // else than 7 bit ASCII characters is undefined, use at your own risk.
 480 #if wxUSE_UNICODE
 481     static wxString FromAscii(const char *ascii);  // string
 482     static wxString FromAscii(const char ascii);   // char
 483     const wxCharBuffer ToAscii() const;
 484 #else // ANSI
 485     static wxString FromAscii(const char *ascii) { return wxString( ascii ); }
 486     static wxString FromAscii(const char ascii) { return wxString( ascii ); }
 487     const char *ToAscii() const { return c_str(); }
 488 #endif // Unicode/!Unicode
 489
 490     // conversions with (possible) format conversions: have to return a
 491     // buffer with temporary data
 492     //
 493     // the functions defined (in either Unicode or ANSI) mode are mb_str() to
 494     // return an ANSI (multibyte) string, wc_str() to return a wide string and
 495     // fn_str() to return a string which should be used with the OS APIs
 496     // accepting the file names. The return value is always the same, but the
 497     // type differs because a function may either return pointer to the buffer
 498     // directly or have to use intermediate buffer for translation.
 499 #if wxUSE_UNICODE
 500     const wxCharBuffer mb_str(wxMBConv& conv = wxConvLibc) const
 501         { return conv.cWC2MB(m_pchData); }
 502
 503     const wxWX2MBbuf mbc_str() const { return mb_str(*wxConvCurrent); }
 504
 505     const wxChar* wc_str() const { return m_pchData; }
 506
 507     // for compatibility with !wxUSE_UNICODE version
 508     const wxChar* wc_str(wxMBConv& WXUNUSED(conv)) const { return m_pchData; }
 509
 510 #if wxMBFILES
 511     const wxCharBuffer fn_str() const { return mb_str(wxConvFile); }
 512 #else // !wxMBFILES
 513     const wxChar* fn_str() const { return m_pchData; }
 514 #endif // wxMBFILES/!wxMBFILES
 515 #else // ANSI
 516     const wxChar* mb_str() const { return m_pchData; }
 517
 518     // for compatibility with wxUSE_UNICODE version
 519     const wxChar* mb_str(wxMBConv& WXUNUSED(conv)) const { return m_pchData; }
 520
 521     const wxWX2MBbuf mbc_str() const { return mb_str(); }
 522
 523 #if wxUSE_WCHAR_T
 524     const wxWCharBuffer wc_str(wxMBConv& conv) const
 525         { return conv.cMB2WC(m_pchData); }
 526 #endif // wxUSE_WCHAR_T
 527
 528     const wxChar* fn_str() const { return m_pchData; }
 529 #endif // Unicode/ANSI
 530
 531   // overloaded assignment
 532     // from another wxString
 533   wxString& operator=(const wxString& stringSrc);
 534     // from a character
 535   wxString& operator=(wxChar ch);
 536     // from a C string
 537   wxString& operator=(const wxChar *psz);
 538 #if wxUSE_UNICODE
 539     // from wxWCharBuffer
 540   wxString& operator=(const wxWCharBuffer& psz)
 541   { (void) operator=((const wchar_t *)psz); return *this; }
 542 #else // ANSI
 543     // from another kind of C string
 544   wxString& operator=(const unsigned char* psz);
 545 #if wxUSE_WCHAR_T
 546     // from a wide string
 547   wxString& operator=(const wchar_t *pwz);
 548 #endif
 549     // from wxCharBuffer
 550   wxString& operator=(const wxCharBuffer& psz)
 551   { (void) operator=((const char *)psz); return *this; }
 552 #endif // Unicode/ANSI
 553
 554   // string concatenation
 555     // in place concatenation
 556     /*
 557         Concatenate and return the result. Note that the left to right
 558         associativity of << allows to write things like "str << str1 << str2
 559         << ..." (unlike with +=)
 560      */
 561       // string += string
 562   wxString& operator<<(const wxString& s)
 563   {
 564     wxASSERT_MSG( s.GetStringData()->IsValid(),
 565                   _T("did you forget to call UngetWriteBuf()?") );
 566
 567     ConcatSelf(s.Len(), s);
 568     return *this;
 569   }
 570       // string += C string
 571   wxString& operator<<(const wxChar *psz)
 572     { ConcatSelf(wxStrlen(psz), psz); return *this; }
 573       // string += char
 574   wxString& operator<<(wxChar ch) { ConcatSelf(1, &ch); return *this; }
 575
 576       // string += string
 577   void operator+=(const wxString& s) { (void)operator<<(s); }
 578       // string += C string
 579   void operator+=(const wxChar *psz) { (void)operator<<(psz); }
 580       // string += char
 581   void operator+=(wxChar ch) { (void)operator<<(ch); }
 582
 583       // string += buffer (i.e. from wxGetString)
 584 #if wxUSE_UNICODE
 585   wxString& operator<<(const wxWCharBuffer& s)
 586     { (void)operator<<((const wchar_t *)s); return *this; }
 587   void operator+=(const wxWCharBuffer& s)
 588     { (void)operator<<((const wchar_t *)s); }
 589 #else // !wxUSE_UNICODE
 590   wxString& operator<<(const wxCharBuffer& s)
 591     { (void)operator<<((const char *)s); return *this; }
 592   void operator+=(const wxCharBuffer& s)
 593     { (void)operator<<((const char *)s); }
 594 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 595
 596     // string += C string
 597   wxString& Append(const wxString& s)
 598     {
 599         // test for IsEmpty() to share the string if possible
 600         if ( IsEmpty() )
 601             *this = s;
 602         else
 603             ConcatSelf(s.Length(), s.c_str());
 604         return *this;
 605     }
 606   wxString& Append(const wxChar* psz)
 607     { ConcatSelf(wxStrlen(psz), psz); return *this; }
 608     // append count copies of given character
 609   wxString& Append(wxChar ch, size_t count = 1u)
 610     { wxString str(ch, count); return *this << str; }
 611   wxString& Append(const wxChar* psz, size_t nLen)
 612     { ConcatSelf(nLen, psz); return *this; }
 613
 614     // prepend a string, return the string itself
 615   wxString& Prepend(const wxString& str)
 616     { *this = str + *this; return *this; }
 617
 618     // non-destructive concatenation
 619       //
 620   friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string1,  const wxString& string2);
 621       //
 622   friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string, wxChar ch);
 623       //
 624   friend wxString WXDLLIMPEXP_BASE operator+(wxChar ch, const wxString& string);
 625       //
 626   friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string, const wxChar *psz);
 627       //
 628   friend wxString WXDLLIMPEXP_BASE operator+(const wxChar *psz, const wxString& string);
 629
 630   // stream-like functions
 631       // insert an int into string
 632   wxString& operator<<(int i)
 633     { return (*this) << Format(_T("%d"), i); }
 634       // insert an unsigned int into string
 635   wxString& operator<<(unsigned int ui)
 636     { return (*this) << Format(_T("%u"), ui); }
 637       // insert a long into string
 638   wxString& operator<<(long l)
 639     { return (*this) << Format(_T("%ld"), l); }
 640       // insert an unsigned long into string
 641   wxString& operator<<(unsigned long ul)
 642     { return (*this) << Format(_T("%lu"), ul); }
 643       // insert a float into string
 644   wxString& operator<<(float f)
 645     { return (*this) << Format(_T("%f"), f); }
 646       // insert a double into string
 647   wxString& operator<<(double d)
 648     { return (*this) << Format(_T("%g"), d); }
 649
 650   // string comparison
 651     // case-sensitive comparison (returns a value < 0, = 0 or > 0)
 652   int Cmp(const wxChar *psz) const { return wxStrcmp(c_str(), psz); }
 653     // same as Cmp() but not case-sensitive
 654   int CmpNoCase(const wxChar *psz) const { return wxStricmp(c_str(), psz); }
 655     // test for the string equality, either considering case or not
 656     // (if compareWithCase then the case matters)
 657   bool IsSameAs(const wxChar *psz, bool compareWithCase = TRUE) const
 658     { return (compareWithCase ? Cmp(psz) : CmpNoCase(psz)) == 0; }
 659     // comparison with a signle character: returns TRUE if equal
 660   bool IsSameAs(wxChar c, bool compareWithCase = TRUE) const
 661     {
 662       return (Len() == 1) && (compareWithCase ? GetChar(0u) == c
 663                               : wxToupper(GetChar(0u)) == wxToupper(c));
 664     }
 665
 666   // simple sub-string extraction
 667       // return substring starting at nFirst of length nCount (or till the end
 668       // if nCount = default value)
 669   wxString Mid(size_t nFirst, size_t nCount = wxSTRING_MAXLEN) const;
 670
 671       // operator version of Mid()
 672   wxString  operator()(size_t start, size_t len) const
 673     { return Mid(start, len); }
 674
 675       // check that the string starts with prefix and return the rest of the
 676       // string in the provided pointer if it is not NULL, otherwise return
 677       // FALSE
 678   bool StartsWith(const wxChar *prefix, wxString *rest = NULL) const;
 679
 680       // get first nCount characters
 681   wxString Left(size_t nCount) const;
 682       // get last nCount characters
 683   wxString Right(size_t nCount) const;
 684       // get all characters before the first occurance of ch
 685       // (returns the whole string if ch not found)
 686   wxString BeforeFirst(wxChar ch) const;
 687       // get all characters before the last occurence of ch
 688       // (returns empty string if ch not found)
 689   wxString BeforeLast(wxChar ch) const;
 690       // get all characters after the first occurence of ch
 691       // (returns empty string if ch not found)
 692   wxString AfterFirst(wxChar ch) const;
 693       // get all characters after the last occurence of ch
 694       // (returns the whole string if ch not found)
 695   wxString AfterLast(wxChar ch) const;
 696
 697     // for compatibility only, use more explicitly named functions above
 698   wxString Before(wxChar ch) const { return BeforeLast(ch); }
 699   wxString After(wxChar ch) const { return AfterFirst(ch); }
 700
 701   // case conversion
 702       // convert to upper case in place, return the string itself
 703   wxString& MakeUpper();
 704       // convert to upper case, return the copy of the string
 705       // Here's something to remember: BC++ doesn't like returns in inlines.
 706   wxString Upper() const ;
 707       // convert to lower case in place, return the string itself
 708   wxString& MakeLower();
 709       // convert to lower case, return the copy of the string
 710   wxString Lower() const ;
 711
 712   // trimming/padding whitespace (either side) and truncating
 713       // remove spaces from left or from right (default) side
 714   wxString& Trim(bool bFromRight = TRUE);
 715       // add nCount copies chPad in the beginning or at the end (default)
 716   wxString& Pad(size_t nCount, wxChar chPad = wxT(' '), bool bFromRight = TRUE);
 717
 718   // searching and replacing
 719       // searching (return starting index, or -1 if not found)
 720   int Find(wxChar ch, bool bFromEnd = FALSE) const;   // like strchr/strrchr
 721       // searching (return starting index, or -1 if not found)
 722   int Find(const wxChar *pszSub) const;               // like strstr
 723       // replace first (or all of bReplaceAll) occurences of substring with
 724       // another string, returns the number of replacements made
 725   size_t Replace(const wxChar *szOld,
 726                  const wxChar *szNew,
 727                  bool bReplaceAll = TRUE);
 728
 729     // check if the string contents matches a mask containing '*' and '?'
 730   bool Matches(const wxChar *szMask) const;
 731
 732     // conversion to numbers: all functions return TRUE only if the whole
 733     // string is a number and put the value of this number into the pointer
 734     // provided, the base is the numeric base in which the conversion should be
 735     // done and must be comprised between 2 and 36 or be 0 in which case the
 736     // standard C rules apply (leading '0' => octal, "0x" => hex)
 737         // convert to a signed integer
 738     bool ToLong(long *val, int base = 10) const;
 739         // convert to an unsigned integer
 740     bool ToULong(unsigned long *val, int base = 10) const;
 741         // convert to a double
 742     bool ToDouble(double *val) const;
 743
 744   // formated input/output
 745     // as sprintf(), returns the number of characters written or < 0 on error
 746     // (take 'this' into account in attribute parameter count)
 747   int Printf(const wxChar *pszFormat, ...) ATTRIBUTE_PRINTF_2;
 748     // as vprintf(), returns the number of characters written or < 0 on error
 749   int PrintfV(const wxChar* pszFormat, va_list argptr);
 750
 751     // returns the string containing the result of Printf() to it
 752   static wxString Format(const wxChar *pszFormat, ...) ATTRIBUTE_PRINTF_1;
 753     // the same as above, but takes a va_list
 754   static wxString FormatV(const wxChar *pszFormat, va_list argptr);
 755
 756   // raw access to string memory
 757     // ensure that string has space for at least nLen characters
 758     // only works if the data of this string is not shared
 759   bool Alloc(size_t nLen);
 760     // minimize the string's memory
 761     // only works if the data of this string is not shared
 762   bool Shrink();
 763     // get writable buffer of at least nLen bytes. Unget() *must* be called
 764     // a.s.a.p. to put string back in a reasonable state!
 765   wxChar *GetWriteBuf(size_t nLen);
 766     // call this immediately after GetWriteBuf() has been used
 767   void UngetWriteBuf();
 768   void UngetWriteBuf(size_t nLen);
 769
 770   // wxWindows version 1 compatibility functions
 771
 772   // use Mid()
 773   wxString SubString(size_t from, size_t to) const
 774       { return Mid(from, (to - from + 1)); }
 775     // values for second parameter of CompareTo function
 776   enum caseCompare {exact, ignoreCase};
 777     // values for first parameter of Strip function
 778   enum stripType {leading = 0x1, trailing = 0x2, both = 0x3};
 779
 780   // use Printf()
 781   // (take 'this' into account in attribute parameter count)
 782   int sprintf(const wxChar *pszFormat, ...) ATTRIBUTE_PRINTF_2;
 783
 784     // use Cmp()
 785   inline int CompareTo(const wxChar* psz, caseCompare cmp = exact) const
 786     { return cmp == exact ? Cmp(psz) : CmpNoCase(psz); }
 787
 788     // use Len
 789   size_t Length() const { return Len(); }
 790     // Count the number of characters
 791   int Freq(wxChar ch) const;
 792     // use MakeLower
 793   void LowerCase() { MakeLower(); }
 794     // use MakeUpper
 795   void UpperCase() { MakeUpper(); }
 796     // use Trim except that it doesn't change this string
 797   wxString Strip(stripType w = trailing) const;
 798
 799     // use Find (more general variants not yet supported)
 800   size_t Index(const wxChar* psz) const { return Find(psz); }
 801   size_t Index(wxChar ch)         const { return Find(ch);  }
 802     // use Truncate
 803   wxString& Remove(size_t pos) { return Truncate(pos); }
 804   wxString& RemoveLast(size_t n = 1) { return Truncate(Len() - n); }
 805
 806   wxString& Remove(size_t nStart, size_t nLen) { return erase( nStart, nLen ); }
 807
 808     // use Find()
 809   int First( const wxChar ch ) const { return Find(ch); }
 810   int First( const wxChar* psz ) const { return Find(psz); }
 811   int First( const wxString &str ) const { return Find(str); }
 812   int Last( const wxChar ch ) const { return Find(ch, TRUE); }
 813   bool Contains(const wxString& str) const { return Find(str) != -1; }
 814
 815     // use IsEmpty()
 816   bool IsNull() const { return IsEmpty(); }
 817
 818 #ifdef  wxSTD_STRING_COMPATIBILITY
 819   // std::string compatibility functions
 820
 821   // standard types
 822   typedef wxChar value_type;
 823   typedef size_t size_type;
 824   typedef value_type *iterator;
 825   typedef const value_type *const_iterator;
 826
 827   // an 'invalid' value for string index
 828   static const size_t npos;
 829
 830   // constructors
 831     // take nLen chars starting at nPos
 832   wxString(const wxString& str, size_t nPos, size_t nLen)
 833       : m_pchData(NULL)
 834   {
 835     wxASSERT_MSG( str.GetStringData()->IsValid(),
 836                   _T("did you forget to call UngetWriteBuf()?") );
 837
 838     InitWith(str.c_str(), nPos, nLen == npos ? 0 : nLen);
 839   }
 840     // take all characters from pStart to pEnd
 841   wxString(const void *pStart, const void *pEnd);
 842
 843   // lib.string.capacity
 844     // return the length of the string
 845   size_t size() const { return Len(); }
 846     // return the length of the string
 847   size_t length() const { return Len(); }
 848     // return the maximum size of the string
 849   size_t max_size() const { return wxSTRING_MAXLEN; }
 850     // resize the string, filling the space with c if c != 0
 851   void resize(size_t nSize, wxChar ch = wxT('\0'));
 852     // delete the contents of the string
 853   void clear() { Empty(); }
 854     // returns true if the string is empty
 855   bool empty() const { return IsEmpty(); }
 856     // inform string about planned change in size
 857   void reserve(size_t sz) { Alloc(sz); }
 858
 859   // lib.string.access
 860     // return the character at position n
 861   wxChar at(size_t n) const { return GetChar(n); }
 862     // returns the writable character at position n
 863   wxChar& at(size_t n) { return GetWritableChar(n); }
 864
 865     // first valid index position
 866   const_iterator begin() const { return wx_str(); }
 867     // position one after the last valid one
 868   const_iterator end() const { return wx_str() + length(); }
 869
 870   // first valid index position
 871   iterator begin() { CopyBeforeWrite(); return m_pchData; }
 872   // position one after the last valid one
 873   iterator end() { CopyBeforeWrite(); return m_pchData + length(); }
 874
 875   // lib.string.modifiers
 876     // append a string
 877   wxString& append(const wxString& str)
 878     { *this += str; return *this; }
 879     // append elements str[pos], ..., str[pos+n]
 880   wxString& append(const wxString& str, size_t pos, size_t n)
 881     { ConcatSelf(n, str.c_str() + pos); return *this; }
 882     // append first n (or all if n == npos) characters of sz
 883   wxString& append(const wxChar *sz, size_t n = npos)
 884     { ConcatSelf(n == npos ? wxStrlen(sz) : n, sz); return *this; }
 885
 886     // append n copies of ch
 887   wxString& append(size_t n, wxChar ch) { return Pad(n, ch); }
 888
 889     // same as `this_string = str'
 890   wxString& assign(const wxString& str)
 891     { return *this = str; }
 892     // same as ` = str[pos..pos + n]
 893   wxString& assign(const wxString& str, size_t pos, size_t n)
 894     { Empty(); return Append(str.c_str() + pos, n); }
 895     // same as `= first n (or all if n == npos) characters of sz'
 896   wxString& assign(const wxChar *sz, size_t n = npos)
 897     { Empty(); return Append(sz, n == npos ? wxStrlen(sz) : n); }
 898     // same as `= n copies of ch'
 899   wxString& assign(size_t n, wxChar ch)
 900     { Empty(); return Append(ch, n); }
 901
 902     // insert another string
 903   wxString& insert(size_t nPos, const wxString& str);
 904     // insert n chars of str starting at nStart (in str)
 905   wxString& insert(size_t nPos, const wxString& str, size_t nStart, size_t n)
 906     { return insert(nPos, wxString((const wxChar *)str + nStart, n)); }
 907
 908     // insert first n (or all if n == npos) characters of sz
 909   wxString& insert(size_t nPos, const wxChar *sz, size_t n = npos)
 910     { return insert(nPos, wxString(sz, n)); }
 911     // insert n copies of ch
 912   wxString& insert(size_t nPos, size_t n, wxChar ch)
 913     { return insert(nPos, wxString(ch, n)); }
 914
 915     // delete characters from nStart to nStart + nLen
 916   wxString& erase(size_t nStart = 0, size_t nLen = npos);
 917
 918     // replaces the substring of length nLen starting at nStart
 919   wxString& replace(size_t nStart, size_t nLen, const wxChar* sz);
 920     // replaces the substring with nCount copies of ch
 921   wxString& replace(size_t nStart, size_t nLen, size_t nCount, wxChar ch);
 922     // replaces a substring with another substring
 923   wxString& replace(size_t nStart, size_t nLen,
 924                     const wxString& str, size_t nStart2, size_t nLen2);
 925     // replaces the substring with first nCount chars of sz
 926   wxString& replace(size_t nStart, size_t nLen,
 927                     const wxChar* sz, size_t nCount);
 928
 929     // swap two strings
 930   void swap(wxString& str);
 931
 932     // All find() functions take the nStart argument which specifies the
 933     // position to start the search on, the default value is 0. All functions
 934     // return npos if there were no match.
 935
 936     // find a substring
 937   size_t find(const wxString& str, size_t nStart = 0) const;
 938
 939   // VC++ 1.5 can't cope with this syntax.
 940 #if !defined(__VISUALC__) || defined(__WIN32__)
 941     // find first n characters of sz
 942   size_t find(const wxChar* sz, size_t nStart = 0, size_t n = npos) const;
 943 #endif // VC++ 1.5
 944
 945   // Gives a duplicate symbol (presumably a case-insensitivity problem)
 946 #if !defined(__BORLANDC__)
 947     // find the first occurence of character ch after nStart
 948   size_t find(wxChar ch, size_t nStart = 0) const;
 949 #endif
 950     // rfind() family is exactly like find() but works right to left
 951
 952     // as find, but from the end
 953   size_t rfind(const wxString& str, size_t nStart = npos) const;
 954
 955   // VC++ 1.5 can't cope with this syntax.
 956 #if !defined(__VISUALC__) || defined(__WIN32__)
 957     // as find, but from the end
 958   size_t rfind(const wxChar* sz, size_t nStart = npos,
 959           size_t n = npos) const;
 960     // as find, but from the end
 961   size_t rfind(wxChar ch, size_t nStart = npos) const;
 962 #endif // VC++ 1.5
 963
 964     // find first/last occurence of any character in the set
 965
 966     // as strpbrk() but starts at nStart, returns npos if not found
 967   size_t find_first_of(const wxString& str, size_t nStart = 0) const
 968     { return find_first_of(str.c_str(), nStart); }
 969     // same as above
 970   size_t find_first_of(const wxChar* sz, size_t nStart = 0) const;
 971     // same as find(char, size_t)
 972   size_t find_first_of(wxChar c, size_t nStart = 0) const
 973     { return find(c, nStart); }
 974     // find the last (starting from nStart) char from str in this string
 975   size_t find_last_of (const wxString& str, size_t nStart = npos) const
 976     { return find_last_of(str.c_str(), nStart); }
 977     // same as above
 978   size_t find_last_of (const wxChar* sz, size_t nStart = npos) const;
 979     // same as above
 980   size_t find_last_of(wxChar c, size_t nStart = npos) const
 981     { return rfind(c, nStart); }
 982
 983     // find first/last occurence of any character not in the set
 984
 985     // as strspn() (starting from nStart), returns npos on failure
 986   size_t find_first_not_of(const wxString& str, size_t nStart = 0) const
 987     { return find_first_not_of(str.c_str(), nStart); }
 988     // same as above
 989   size_t find_first_not_of(const wxChar* sz, size_t nStart = 0) const;
 990     // same as above
 991   size_t find_first_not_of(wxChar ch, size_t nStart = 0) const;
 992     //  as strcspn()
 993   size_t find_last_not_of(const wxString& str, size_t nStart = npos) const
 994     { return find_first_not_of(str.c_str(), nStart); }
 995     // same as above
 996   size_t find_last_not_of(const wxChar* sz, size_t nStart = npos) const;
 997     // same as above
 998   size_t find_last_not_of(wxChar ch, size_t nStart = npos) const;
 999
1000     // All compare functions return -1, 0 or 1 if the [sub]string is less,
1001     // equal or greater than the compare() argument.
1002
1003     // just like strcmp()
1004   int compare(const wxString& str) const { return Cmp(str); }
1005     // comparison with a substring
1006   int compare(size_t nStart, size_t nLen, const wxString& str) const
1007     { return Mid(nStart, nLen).Cmp(str); }
1008     // comparison of 2 substrings
1009   int compare(size_t nStart, size_t nLen,
1010               const wxString& str, size_t nStart2, size_t nLen2) const
1011     { return Mid(nStart, nLen).Cmp(str.Mid(nStart2, nLen2)); }
1012     // just like strcmp()
1013   int compare(const wxChar* sz) const { return Cmp(sz); }
1014     // substring comparison with first nCount characters of sz
1015   int compare(size_t nStart, size_t nLen,
1016               const wxChar* sz, size_t nCount = npos) const
1017     { return Mid(nStart, nLen).Cmp(wxString(sz, nCount)); }
1018
1019   // substring extraction
1020   wxString substr(size_t nStart = 0, size_t nLen = npos) const
1021     { return Mid(nStart, nLen); }
1022 #endif // wxSTD_STRING_COMPATIBILITY
1023 };
1024
1025 // define wxArrayString, for compatibility
1026 #if WXWIN_COMPATIBILITY_2_4 && !wxUSE_STL
1027     #include "wx/arrstr.h"
1028 #endif
1029
1030 // ----------------------------------------------------------------------------
1031 // wxStringBuffer: a tiny class allowing to get a writable pointer into string
1032 // ----------------------------------------------------------------------------
1033
1034 class WXDLLIMPEXP_BASE wxStringBuffer
1035 {
1036 public:
1037     wxStringBuffer(wxString& str, size_t lenWanted = 1024)
1038         : m_str(str), m_buf(NULL)
1039         { m_buf = m_str.GetWriteBuf(lenWanted); }
1040
1041     ~wxStringBuffer() { m_str.UngetWriteBuf(); }
1042
1043     operator wxChar*() const { return m_buf; }
1044
1045 private:
1046     wxString& m_str;
1047     wxChar   *m_buf;
1048
1049     DECLARE_NO_COPY_CLASS(wxStringBuffer)
1050 };
1051
1052 // ---------------------------------------------------------------------------
1053 // wxString comparison functions: operator versions are always case sensitive
1054 // ---------------------------------------------------------------------------
1055
1056 inline bool operator==(const wxString& s1, const wxString& s2)
1057     { return (s1.Len() == s2.Len()) && (s1.Cmp(s2) == 0); }
1058 inline bool operator==(const wxString& s1, const wxChar  * s2)
1059     { return s1.Cmp(s2) == 0; }
1060 inline bool operator==(const wxChar  * s1, const wxString& s2)
1061     { return s2.Cmp(s1) == 0; }
1062 inline bool operator!=(const wxString& s1, const wxString& s2)
1063     { return (s1.Len() != s2.Len()) || (s1.Cmp(s2) != 0); }
1064 inline bool operator!=(const wxString& s1, const wxChar  * s2)
1065     { return s1.Cmp(s2) != 0; }
1066 inline bool operator!=(const wxChar  * s1, const wxString& s2)
1067     { return s2.Cmp(s1) != 0; }
1068 inline bool operator< (const wxString& s1, const wxString& s2)
1069     { return s1.Cmp(s2) < 0; }
1070 inline bool operator< (const wxString& s1, const wxChar  * s2)
1071     { return s1.Cmp(s2) <  0; }
1072 inline bool operator< (const wxChar  * s1, const wxString& s2)
1073     { return s2.Cmp(s1) >  0; }
1074 inline bool operator> (const wxString& s1, const wxString& s2)
1075     { return s1.Cmp(s2) >  0; }
1076 inline bool operator> (const wxString& s1, const wxChar  * s2)
1077     { return s1.Cmp(s2) >  0; }
1078 inline bool operator> (const wxChar  * s1, const wxString& s2)
1079     { return s2.Cmp(s1) <  0; }
1080 inline bool operator<=(const wxString& s1, const wxString& s2)
1081     { return s1.Cmp(s2) <= 0; }
1082 inline bool operator<=(const wxString& s1, const wxChar  * s2)
1083     { return s1.Cmp(s2) <= 0; }
1084 inline bool operator<=(const wxChar  * s1, const wxString& s2)
1085     { return s2.Cmp(s1) >= 0; }
1086 inline bool operator>=(const wxString& s1, const wxString& s2)
1087     { return s1.Cmp(s2) >= 0; }
1088 inline bool operator>=(const wxString& s1, const wxChar  * s2)
1089     { return s1.Cmp(s2) >= 0; }
1090 inline bool operator>=(const wxChar  * s1, const wxString& s2)
1091     { return s2.Cmp(s1) <= 0; }
1092
1093 // comparison with char
1094 inline bool operator==(wxChar c, const wxString& s) { return s.IsSameAs(c); }
1095 inline bool operator==(const wxString& s, wxChar c) { return s.IsSameAs(c); }
1096 inline bool operator!=(wxChar c, const wxString& s) { return !s.IsSameAs(c); }
1097 inline bool operator!=(const wxString& s, wxChar c) { return !s.IsSameAs(c); }
1098
1099 #if wxUSE_UNICODE
1100 inline bool operator==(const wxString& s1, const wxWCharBuffer& s2)
1101     { return (s1.Cmp((const wchar_t *)s2) == 0); }
1102 inline bool operator==(const wxWCharBuffer& s1, const wxString& s2)
1103     { return (s2.Cmp((const wchar_t *)s1) == 0); }
1104 inline bool operator!=(const wxString& s1, const wxWCharBuffer& s2)
1105     { return (s1.Cmp((const wchar_t *)s2) != 0); }
1106 inline bool operator!=(const wxWCharBuffer& s1, const wxString& s2)
1107     { return (s2.Cmp((const wchar_t *)s1) != 0); }
1108 #else // !wxUSE_UNICODE
1109 inline bool operator==(const wxString& s1, const wxCharBuffer& s2)
1110     { return (s1.Cmp((const char *)s2) == 0); }
1111 inline bool operator==(const wxCharBuffer& s1, const wxString& s2)
1112     { return (s2.Cmp((const char *)s1) == 0); }
1113 inline bool operator!=(const wxString& s1, const wxCharBuffer& s2)
1114     { return (s1.Cmp((const char *)s2) != 0); }
1115 inline bool operator!=(const wxCharBuffer& s1, const wxString& s2)
1116     { return (s2.Cmp((const char *)s1) != 0); }
1117 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
1118
1119 wxString WXDLLIMPEXP_BASE operator+(const wxString& string1,  const wxString& string2);
1120 wxString WXDLLIMPEXP_BASE operator+(const wxString& string, wxChar ch);
1121 wxString WXDLLIMPEXP_BASE operator+(wxChar ch, const wxString& string);
1122 wxString WXDLLIMPEXP_BASE operator+(const wxString& string, const wxChar *psz);
1123 wxString WXDLLIMPEXP_BASE operator+(const wxChar *psz, const wxString& string);
1124 #if wxUSE_UNICODE
1125 inline wxString operator+(const wxString& string, const wxWCharBuffer& buf)
1126     { return string + (const wchar_t *)buf; }
1127 inline wxString operator+(const wxWCharBuffer& buf, const wxString& string)
1128     { return (const wchar_t *)buf + string; }
1129 #else // !wxUSE_UNICODE
1130 inline wxString operator+(const wxString& string, const wxCharBuffer& buf)
1131     { return string + (const char *)buf; }
1132 inline wxString operator+(const wxCharBuffer& buf, const wxString& string)
1133     { return (const char *)buf + string; }
1134 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
1135
1136 // ---------------------------------------------------------------------------
1137 // Implementation only from here until the end of file
1138 // ---------------------------------------------------------------------------
1139
1140 // don't pollute the library user's name space
1141 #undef wxASSERT_VALID_INDEX
1142
1143 #if defined(wxSTD_STRING_COMPATIBILITY) && wxUSE_STD_IOSTREAM
1144
1145 #include "wx/iosfwrap.h"
1146
1147 WXDLLIMPEXP_BASE wxSTD istream& operator>>(wxSTD istream&, wxString&);
1148 WXDLLIMPEXP_BASE wxSTD ostream& operator<<(wxSTD ostream&, const wxString&);
1149
1150 #endif  // wxSTD_STRING_COMPATIBILITY
1151
1152 #endif  // _WX_WXSTRINGH__