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 license
  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 #ifdef __GNUG__
  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 // define to derive wxString from wxObject (deprecated!)
  33 #ifdef WXSTRING_IS_WXOBJECT
  34     #undef WXSTRING_IS_WXOBJECT
  35 #endif
  36
  37 // ----------------------------------------------------------------------------
  38 // headers
  39 // ----------------------------------------------------------------------------
  40
  41 #if defined(__WXMAC__) || defined(__VISAGECPP__)
  42     #include <ctype.h>
  43 #endif
  44
  45 #ifdef __EMX__
  46     #include <std.h>
  47 #endif
  48
  49 #if defined(__VISAGECPP__) && __IBMCPP__ >= 400
  50    // problem in VACPP V4 with including stdlib.h multiple times
  51    // strconv includes it anyway
  52 #  include <stdio.h>
  53 #  include <string.h>
  54 #  include <stdarg.h>
  55 #  include <limits.h>
  56 #else
  57 #  include <string.h>
  58 #  include <stdio.h>
  59 #  include <stdarg.h>
  60 #  include <limits.h>
  61 #  include <stdlib.h>
  62 #endif
  63
  64 #ifdef HAVE_STRINGS_H
  65     #include <strings.h>    // for strcasecmp()
  66 #endif // AIX
  67
  68 #include "wx/defs.h"        // everybody should include this
  69 #include "wx/wxchar.h"      // for wxChar
  70 #include "wx/buffer.h"      // for wxCharBuffer
  71 #include "wx/strconv.h"     // for wxConvertXXX() macros and wxMBConv classes
  72
  73 #ifndef  WX_PRECOMP
  74   #ifdef    WXSTRING_IS_WXOBJECT
  75     #include "wx/object.h" // base class
  76   #endif
  77 #endif // !PCH
  78
  79 // ---------------------------------------------------------------------------
  80 // macros
  81 // ---------------------------------------------------------------------------
  82
  83 // 'naughty' cast
  84 #define   WXSTRINGCAST (wxChar *)(const wxChar *)
  85 #define   wxCSTRINGCAST (wxChar *)(const wxChar *)
  86 #define   wxMBSTRINGCAST (char *)(const char *)
  87 #define   wxWCSTRINGCAST (wchar_t *)(const wchar_t *)
  88
  89 // implementation only
  90 #define   ASSERT_VALID_INDEX(i) wxASSERT( (unsigned)(i) <= Len() )
  91
  92 // ----------------------------------------------------------------------------
  93 // constants
  94 // ----------------------------------------------------------------------------
  95
  96 #if defined(__VISAGECPP__) && __IBMCPP__ >= 400
  97 // must define this static for VA or else you get multiply defined symbols everywhere
  98 extern const unsigned int wxSTRING_MAXLEN;
  99
 100 #else
 101 // maximum possible length for a string means "take all string" everywhere
 102 //  (as sizeof(StringData) is unknown here, we substract 100)
 103 const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100;
 104
 105 #endif
 106
 107 // ----------------------------------------------------------------------------
 108 // global data
 109 // ----------------------------------------------------------------------------
 110
 111 // global pointer to empty string
 112 WXDLLEXPORT_DATA(extern const wxChar*) wxEmptyString;
 113
 114 // ---------------------------------------------------------------------------
 115 // global functions complementing standard C string library replacements for
 116 // strlen() and portable strcasecmp()
 117 //---------------------------------------------------------------------------
 118
 119 // Use wxXXX() functions from wxchar.h instead! These functions are for
 120 // backwards compatibility only.
 121
 122 // checks whether the passed in pointer is NULL and if the string is empty
 123 inline bool WXDLLEXPORT IsEmpty(const char *p) { return (!p || !*p); }
 124
 125 // safe version of strlen() (returns 0 if passed NULL pointer)
 126 inline size_t WXDLLEXPORT Strlen(const char *psz)
 127   { return psz ? strlen(psz) : 0; }
 128
 129 // portable strcasecmp/_stricmp
 130 inline int WXDLLEXPORT Stricmp(const char *psz1, const char *psz2)
 131 {
 132 #if 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(__EMX__)
 143   return stricmp(psz1, psz2);
 144 #elif defined(__WXPM__)
 145   return stricmp(psz1, psz2);
 146 #elif defined(__UNIX__) || defined(__GNUWIN32__)
 147   return strcasecmp(psz1, psz2);
 148 #elif defined(__MWERKS__) && !defined(__INTEL__)
 149   register char c1, c2;
 150   do {
 151     c1 = tolower(*psz1++);
 152     c2 = tolower(*psz2++);
 153   } while ( c1 && (c1 == c2) );
 154
 155   return c1 - c2;
 156 #else
 157   // almost all compilers/libraries provide this function (unfortunately under
 158   // different names), that's why we don't implement our own which will surely
 159   // be more efficient than this code (uncomment to use):
 160   /*
 161     register char c1, c2;
 162     do {
 163       c1 = tolower(*psz1++);
 164       c2 = tolower(*psz2++);
 165     } while ( c1 && (c1 == c2) );
 166
 167     return c1 - c2;
 168   */
 169
 170   #error  "Please define string case-insensitive compare for your OS/compiler"
 171 #endif  // OS/compiler
 172 }
 173
 174 // wxSnprintf() is like snprintf() if it's available and sprintf() (always
 175 // available, but dangerous!) if not
 176 extern int WXDLLEXPORT wxSnprintf(wxChar *buf, size_t len,
 177                                   const wxChar *format, ...);
 178
 179 // and wxVsnprintf() is like vsnprintf() or vsprintf()
 180 extern int WXDLLEXPORT wxVsnprintf(wxChar *buf, size_t len,
 181                                    const wxChar *format, va_list argptr);
 182
 183 // return an empty wxString
 184 class WXDLLEXPORT wxString; // not yet defined
 185 inline const wxString& wxGetEmptyString() { return *(wxString *)&wxEmptyString; }
 186
 187 // ---------------------------------------------------------------------------
 188 // string data prepended with some housekeeping info (used by wxString class),
 189 // is never used directly (but had to be put here to allow inlining)
 190 // ---------------------------------------------------------------------------
 191
 192 struct WXDLLEXPORT wxStringData
 193 {
 194   int     nRefs;        // reference count
 195   size_t  nDataLength,  // actual string length
 196           nAllocLength; // allocated memory size
 197
 198   // mimics declaration 'wxChar data[nAllocLength]'
 199   wxChar* data() const { return (wxChar*)(this + 1); }
 200
 201   // empty string has a special ref count so it's never deleted
 202   bool  IsEmpty()   const { return (nRefs == -1); }
 203   bool  IsShared()  const { return (nRefs > 1);   }
 204
 205   // lock/unlock
 206   void  Lock()   { if ( !IsEmpty() ) nRefs++;                    }
 207
 208   // VC++ will refuse to inline this function but profiling shows that it
 209   // is wrong
 210 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
 211   __forceinline
 212 #endif
 213   void  Unlock() { if ( !IsEmpty() && --nRefs == 0) free(this);  }
 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 #ifdef  WXSTRING_IS_WXOBJECT
 245 class WXDLLEXPORT wxString : public wxObject
 246 {
 247     DECLARE_DYNAMIC_CLASS(wxString)
 248 #else   //WXSTRING_IS_WXOBJECT
 249 class WXDLLEXPORT wxString
 250 {
 251 #endif  //WXSTRING_IS_WXOBJECT
 252
 253 friend class WXDLLEXPORT wxArrayString;
 254
 255   // NB: special care was taken in arranging the member functions in such order
 256   //     that all inline functions can be effectively inlined, verify that all
 257   //     performace critical functions are still inlined if you change order!
 258 private:
 259   // points to data preceded by wxStringData structure with ref count info
 260   wxChar *m_pchData;
 261
 262   // accessor to string data
 263   wxStringData* GetStringData() const { return (wxStringData*)m_pchData - 1; }
 264
 265   // string (re)initialization functions
 266     // initializes the string to the empty value (must be called only from
 267     // ctors, use Reinit() otherwise)
 268   void Init() { m_pchData = (wxChar *)wxEmptyString; }
 269     // initializaes the string with (a part of) C-string
 270   void InitWith(const wxChar *psz, size_t nPos = 0, size_t nLen = wxSTRING_MAXLEN);
 271     // as Init, but also frees old data
 272   void Reinit() { GetStringData()->Unlock(); Init(); }
 273
 274   // memory allocation
 275     // allocates memory for string of lenght nLen
 276   void AllocBuffer(size_t nLen);
 277     // copies data to another string
 278   void AllocCopy(wxString&, int, int) const;
 279     // effectively copies data to string
 280   void AssignCopy(size_t, const wxChar *);
 281
 282   // append a (sub)string
 283   void ConcatSelf(int nLen, const wxChar *src);
 284
 285   // functions called before writing to the string: they copy it if there
 286   // are other references to our data (should be the only owner when writing)
 287   void CopyBeforeWrite();
 288   void AllocBeforeWrite(size_t);
 289
 290   // this method is not implemented - there is _no_ conversion from int to
 291   // string, you're doing something wrong if the compiler wants to call it!
 292   //
 293   // try `s << i' or `s.Printf("%d", i)' instead
 294   wxString(int);
 295   wxString(unsigned int);
 296   wxString(long);
 297   wxString(unsigned long);
 298
 299 public:
 300   // constructors and destructor
 301     // ctor for an empty string
 302   wxString() { Init(); }
 303     // copy ctor
 304   wxString(const wxString& stringSrc)
 305   {
 306     wxASSERT( stringSrc.GetStringData()->IsValid() );
 307
 308     if ( stringSrc.IsEmpty() ) {
 309       // nothing to do for an empty string
 310       Init();
 311     }
 312     else {
 313       m_pchData = stringSrc.m_pchData;            // share same data
 314       GetStringData()->Lock();                    // => one more copy
 315     }
 316   }
 317     // string containing nRepeat copies of ch
 318   wxString(wxChar ch, size_t nRepeat = 1);
 319     // ctor takes first nLength characters from C string
 320     // (default value of wxSTRING_MAXLEN means take all the string)
 321   wxString(const wxChar *psz, size_t nLength = wxSTRING_MAXLEN)
 322     { InitWith(psz, 0, nLength); }
 323   wxString(const wxChar *psz, wxMBConv& WXUNUSED(conv), size_t nLength = wxSTRING_MAXLEN)
 324     { InitWith(psz, 0, nLength); }
 325
 326 #if wxUSE_UNICODE
 327     // from multibyte string
 328     // (NB: nLength is right now number of Unicode characters, not
 329     //  characters in psz! So try not to use it yet!)
 330   wxString(const char *psz, wxMBConv& conv = wxConvLibc, size_t nLength = wxSTRING_MAXLEN);
 331     // from wxWCharBuffer (i.e. return from wxGetString)
 332   wxString(const wxWCharBuffer& psz)
 333     { InitWith(psz, 0, wxSTRING_MAXLEN); }
 334 #else // ANSI
 335     // from C string (for compilers using unsigned char)
 336   wxString(const unsigned char* psz, size_t nLength = wxSTRING_MAXLEN)
 337     { InitWith((const char*)psz, 0, nLength); }
 338
 339 #if wxUSE_WCHAR_T
 340     // from wide (Unicode) string
 341   wxString(const wchar_t *pwz, wxMBConv& conv = wxConvLibc);
 342 #endif // !wxUSE_WCHAR_T
 343
 344     // from wxCharBuffer
 345   wxString(const wxCharBuffer& psz)
 346     { InitWith(psz, 0, wxSTRING_MAXLEN); }
 347 #endif // Unicode/ANSI
 348
 349     // dtor is not virtual, this class must not be inherited from!
 350  ~wxString() { GetStringData()->Unlock(); }
 351
 352   // generic attributes & operations
 353     // as standard strlen()
 354   size_t Len() const { return GetStringData()->nDataLength; }
 355     // string contains any characters?
 356   bool IsEmpty() const { return Len() == 0; }
 357     // empty string is "FALSE", so !str will return TRUE
 358   bool operator!() const { return IsEmpty(); }
 359     // empty string contents
 360   void Empty()
 361   {
 362     if ( !IsEmpty() )
 363       Reinit();
 364
 365     // should be empty
 366     wxASSERT( GetStringData()->nDataLength == 0 );
 367   }
 368     // empty the string and free memory
 369   void Clear()
 370   {
 371     if ( !GetStringData()->IsEmpty() )
 372       Reinit();
 373
 374     wxASSERT( GetStringData()->nDataLength == 0 );  // should be empty
 375     wxASSERT( GetStringData()->nAllocLength == 0 ); // and not own any memory
 376   }
 377
 378   // contents test
 379     // Is an ascii value
 380   bool IsAscii() const;
 381     // Is a number
 382   bool IsNumber() const;
 383     // Is a word
 384   bool IsWord() const;
 385
 386   // data access (all indexes are 0 based)
 387     // read access
 388     wxChar  GetChar(size_t n) const
 389       { ASSERT_VALID_INDEX( n );  return m_pchData[n]; }
 390     // read/write access
 391     wxChar& GetWritableChar(size_t n)
 392       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 393     // write access
 394     void  SetChar(size_t n, wxChar ch)
 395       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); m_pchData[n] = ch; }
 396
 397     // get last character
 398     wxChar  Last() const
 399       { wxASSERT( !IsEmpty() ); return m_pchData[Len() - 1]; }
 400     // get writable last character
 401     wxChar& Last()
 402       { wxASSERT( !IsEmpty() ); CopyBeforeWrite(); return m_pchData[Len()-1]; }
 403
 404     // operator version of GetChar
 405     wxChar  operator[](size_t n) const
 406       { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
 407
 408     // operator version of GetChar
 409     wxChar  operator[](int n) const
 410       { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
 411 #ifdef __alpha__
 412     // operator version of GetChar
 413     wxChar  operator[](unsigned int n) const
 414       { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
 415 #endif
 416
 417     // operator version of GetWriteableChar
 418     wxChar& operator[](size_t n)
 419       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 420 #ifdef __alpha__
 421     // operator version of GetWriteableChar
 422     wxChar&  operator[](unsigned int n)
 423       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 424 #endif
 425
 426     // implicit conversion to C string
 427     operator const wxChar*() const { return m_pchData; }
 428     // explicit conversion to C string (use this with printf()!)
 429     const wxChar* c_str()   const { return m_pchData; }
 430     // identical to c_str()
 431     const wxChar* wx_str()  const { return m_pchData; }
 432     // identical to c_str()
 433     const wxChar* GetData() const { return m_pchData; }
 434
 435     // conversions with (possible) format convertions: have to return a
 436     // buffer with temporary data
 437     //
 438     // the functions defined (in either Unicode or ANSI) mode are mb_str() to
 439     // return an ANSI (multibyte) string, wc_str() to return a wide string and
 440     // fn_str() to return a string which should be used with the OS APIs
 441     // accepting the file names. The return value is always the same, but the
 442     // type differs because a function may either return pointer to the buffer
 443     // directly or have to use intermediate buffer for translation.
 444 #if wxUSE_UNICODE
 445     const wxCharBuffer mb_str(wxMBConv& conv = wxConvLibc) const
 446         { return conv.cWC2MB(m_pchData); }
 447
 448     const wxWX2MBbuf mbc_str() const { return mb_str(*wxConvCurrent); }
 449
 450     const wxChar* wc_str() const { return m_pchData; }
 451
 452     // for compatibility with !wxUSE_UNICODE version
 453     const wxChar* wc_str(wxMBConv& WXUNUSED(conv)) const { return m_pchData; }
 454
 455 #if wxMBFILES
 456     const wxCharBuffer fn_str() const { return mb_str(wxConvFile); }
 457 #else // !wxMBFILES
 458     const wxChar* fn_str() const { return m_pchData; }
 459 #endif // wxMBFILES/!wxMBFILES
 460 #else // ANSI
 461     const wxChar* mb_str() const { return m_pchData; }
 462
 463     // for compatibility with wxUSE_UNICODE version
 464     const wxChar* mb_str(wxMBConv& WXUNUSED(conv)) const { return m_pchData; }
 465
 466     const wxWX2MBbuf mbc_str() const { return mb_str(); }
 467
 468 #if wxUSE_WCHAR_T
 469     const wxWCharBuffer wc_str(wxMBConv& conv) const
 470         { return conv.cMB2WC(m_pchData); }
 471 #endif // wxUSE_WCHAR_T
 472
 473     const wxChar* fn_str() const { return m_pchData; }
 474 #endif // Unicode/ANSI
 475
 476   // overloaded assignment
 477     // from another wxString
 478   wxString& operator=(const wxString& stringSrc);
 479     // from a character
 480   wxString& operator=(wxChar ch);
 481     // from a C string
 482   wxString& operator=(const wxChar *psz);
 483 #if wxUSE_UNICODE
 484     // from wxWCharBuffer
 485   wxString& operator=(const wxWCharBuffer& psz) { return operator=((const wchar_t *)psz); }
 486 #else // ANSI
 487     // from another kind of C string
 488   wxString& operator=(const unsigned char* psz);
 489 #if wxUSE_WCHAR_T
 490     // from a wide string
 491   wxString& operator=(const wchar_t *pwz);
 492 #endif
 493     // from wxCharBuffer
 494   wxString& operator=(const wxCharBuffer& psz) { return operator=((const char *)psz); }
 495 #endif // Unicode/ANSI
 496
 497   // string concatenation
 498     // in place concatenation
 499     /*
 500         Concatenate and return the result. Note that the left to right
 501         associativity of << allows to write things like "str << str1 << str2
 502         << ..." (unlike with +=)
 503      */
 504       // string += string
 505   wxString& operator<<(const wxString& s)
 506   {
 507     wxASSERT( s.GetStringData()->IsValid() );
 508
 509     ConcatSelf(s.Len(), s);
 510     return *this;
 511   }
 512       // string += C string
 513   wxString& operator<<(const wxChar *psz)
 514     { ConcatSelf(wxStrlen(psz), psz); return *this; }
 515       // string += char
 516   wxString& operator<<(wxChar ch) { ConcatSelf(1, &ch); return *this; }
 517
 518       // string += string
 519   void operator+=(const wxString& s) { (void)operator<<(s); }
 520       // string += C string
 521   void operator+=(const wxChar *psz) { (void)operator<<(psz); }
 522       // string += char
 523   void operator+=(wxChar ch) { (void)operator<<(ch); }
 524
 525       // string += buffer (i.e. from wxGetString)
 526 #if wxUSE_UNICODE
 527   wxString& operator<<(const wxWCharBuffer& s) { (void)operator<<((const wchar_t *)s); return *this; }
 528   void operator+=(const wxWCharBuffer& s) { (void)operator<<((const wchar_t *)s); }
 529 #else
 530   wxString& operator<<(const wxCharBuffer& s) { (void)operator<<((const char *)s); return *this; }
 531   void operator+=(const wxCharBuffer& s) { (void)operator<<((const char *)s); }
 532 #endif
 533
 534     // string += C string
 535   wxString& Append(const wxChar* psz)
 536     { ConcatSelf(wxStrlen(psz), psz); return *this; }
 537     // append count copies of given character
 538   wxString& Append(wxChar ch, size_t count = 1u)
 539     { wxString str(ch, count); return *this << str; }
 540   wxString& Append(const wxChar* psz, size_t nLen)
 541     { ConcatSelf(nLen, psz); return *this; }
 542
 543     // prepend a string, return the string itself
 544   wxString& Prepend(const wxString& str)
 545     { *this = str + *this; return *this; }
 546
 547     // non-destructive concatenation
 548       //
 549   friend wxString WXDLLEXPORT operator+(const wxString& string1,  const wxString& string2);
 550       //
 551   friend wxString WXDLLEXPORT operator+(const wxString& string, wxChar ch);
 552       //
 553   friend wxString WXDLLEXPORT operator+(wxChar ch, const wxString& string);
 554       //
 555   friend wxString WXDLLEXPORT operator+(const wxString& string, const wxChar *psz);
 556       //
 557   friend wxString WXDLLEXPORT operator+(const wxChar *psz, const wxString& string);
 558
 559   // stream-like functions
 560       // insert an int into string
 561   wxString& operator<<(int i)
 562     { return (*this) << Format(_T("%d"), i); }
 563       // insert an unsigned int into string
 564   wxString& operator<<(unsigned int ui)
 565     { return (*this) << Format(_T("%u"), ui); }
 566       // insert a long into string
 567   wxString& operator<<(long l)
 568     { return (*this) << Format(_T("%ld"), l); }
 569       // insert an unsigned long into string
 570   wxString& operator<<(unsigned long ul)
 571     { return (*this) << Format(_T("%lu"), ul); }
 572       // insert a float into string
 573   wxString& operator<<(float f)
 574     { return (*this) << Format(_T("%f"), f); }
 575       // insert a double into string
 576   wxString& operator<<(double d)
 577     { return (*this) << Format(_T("%g"), d); }
 578
 579   // string comparison
 580     // case-sensitive comparison (returns a value < 0, = 0 or > 0)
 581   int Cmp(const wxChar *psz) const { return wxStrcmp(c_str(), psz); }
 582     // same as Cmp() but not case-sensitive
 583   int CmpNoCase(const wxChar *psz) const { return wxStricmp(c_str(), psz); }
 584     // test for the string equality, either considering case or not
 585     // (if compareWithCase then the case matters)
 586   bool IsSameAs(const wxChar *psz, bool compareWithCase = TRUE) const
 587     { return (compareWithCase ? Cmp(psz) : CmpNoCase(psz)) == 0; }
 588     // comparison with a signle character: returns TRUE if equal
 589   bool IsSameAs(wxChar c, bool compareWithCase = TRUE) const
 590     {
 591       return (Len() == 1) && (compareWithCase ? GetChar(0u) == c
 592                               : wxToupper(GetChar(0u)) == wxToupper(c));
 593     }
 594
 595   // simple sub-string extraction
 596       // return substring starting at nFirst of length nCount (or till the end
 597       // if nCount = default value)
 598   wxString Mid(size_t nFirst, size_t nCount = wxSTRING_MAXLEN) const;
 599
 600       // operator version of Mid()
 601   wxString  operator()(size_t start, size_t len) const
 602     { return Mid(start, len); }
 603
 604       // check that the tring starts with prefix and return the rest of the
 605       // string in the provided pointer if it is not NULL, otherwise return
 606       // FALSE
 607   bool StartsWith(const wxChar *prefix, wxString *rest = NULL) const;
 608
 609       // get first nCount characters
 610   wxString Left(size_t nCount) const;
 611       // get last nCount characters
 612   wxString Right(size_t nCount) const;
 613       // get all characters before the first occurence of ch
 614       // (returns the whole string if ch not found)
 615   wxString BeforeFirst(wxChar ch) const;
 616       // get all characters before the last occurence of ch
 617       // (returns empty string if ch not found)
 618   wxString BeforeLast(wxChar ch) const;
 619       // get all characters after the first occurence of ch
 620       // (returns empty string if ch not found)
 621   wxString AfterFirst(wxChar ch) const;
 622       // get all characters after the last occurence of ch
 623       // (returns the whole string if ch not found)
 624   wxString AfterLast(wxChar ch) const;
 625
 626     // for compatibility only, use more explicitly named functions above
 627   wxString Before(wxChar ch) const { return BeforeLast(ch); }
 628   wxString After(wxChar ch) const { return AfterFirst(ch); }
 629
 630   // case conversion
 631       // convert to upper case in place, return the string itself
 632   wxString& MakeUpper();
 633       // convert to upper case, return the copy of the string
 634       // Here's something to remember: BC++ doesn't like returns in inlines.
 635   wxString Upper() const ;
 636       // convert to lower case in place, return the string itself
 637   wxString& MakeLower();
 638       // convert to lower case, return the copy of the string
 639   wxString Lower() const ;
 640
 641   // trimming/padding whitespace (either side) and truncating
 642       // remove spaces from left or from right (default) side
 643   wxString& Trim(bool bFromRight = TRUE);
 644       // add nCount copies chPad in the beginning or at the end (default)
 645   wxString& Pad(size_t nCount, wxChar chPad = wxT(' '), bool bFromRight = TRUE);
 646       // truncate string to given length
 647   wxString& Truncate(size_t uiLen);
 648
 649   // searching and replacing
 650       // searching (return starting index, or -1 if not found)
 651   int Find(wxChar ch, bool bFromEnd = FALSE) const;   // like strchr/strrchr
 652       // searching (return starting index, or -1 if not found)
 653   int Find(const wxChar *pszSub) const;               // like strstr
 654       // replace first (or all of bReplaceAll) occurences of substring with
 655       // another string, returns the number of replacements made
 656   size_t Replace(const wxChar *szOld,
 657                  const wxChar *szNew,
 658                  bool bReplaceAll = TRUE);
 659
 660     // check if the string contents matches a mask containing '*' and '?'
 661   bool Matches(const wxChar *szMask) const;
 662
 663     // conversion to numbers: all functions return TRUE only if the whole string
 664     // is a number and put the value of this number into the pointer provided
 665         // convert to a signed integer
 666     bool ToLong(long *val) const;
 667         // convert to an unsigned integer
 668     bool ToULong(unsigned long *val) const;
 669         // convert to a double
 670     bool ToDouble(double *val) const;
 671
 672   // formated input/output
 673     // as sprintf(), returns the number of characters written or < 0 on error
 674   int Printf(const wxChar *pszFormat, ...);
 675     // as vprintf(), returns the number of characters written or < 0 on error
 676   int PrintfV(const wxChar* pszFormat, va_list argptr);
 677
 678     // returns the string containing the result of Printf() to it
 679   static wxString Format(const wxChar *pszFormat, ...);
 680     // the same as above, but takes a va_list
 681   static wxString FormatV(const wxChar *pszFormat, va_list argptr);
 682
 683   // raw access to string memory
 684     // ensure that string has space for at least nLen characters
 685     // only works if the data of this string is not shared
 686   void Alloc(size_t nLen);
 687     // minimize the string's memory
 688     // only works if the data of this string is not shared
 689   void Shrink();
 690     // get writable buffer of at least nLen bytes. Unget() *must* be called
 691     // a.s.a.p. to put string back in a reasonable state!
 692   wxChar *GetWriteBuf(size_t nLen);
 693     // call this immediately after GetWriteBuf() has been used
 694   void UngetWriteBuf();
 695   void UngetWriteBuf(size_t nLen);
 696
 697   // wxWindows version 1 compatibility functions
 698
 699   // use Mid()
 700   wxString SubString(size_t from, size_t to) const
 701       { return Mid(from, (to - from + 1)); }
 702     // values for second parameter of CompareTo function
 703   enum caseCompare {exact, ignoreCase};
 704     // values for first parameter of Strip function
 705   enum stripType {leading = 0x1, trailing = 0x2, both = 0x3};
 706
 707     // use Printf()
 708   int sprintf(const wxChar *pszFormat, ...);
 709
 710     // use Cmp()
 711   inline int CompareTo(const wxChar* psz, caseCompare cmp = exact) const
 712     { return cmp == exact ? Cmp(psz) : CmpNoCase(psz); }
 713
 714     // use Len
 715   size_t Length() const { return Len(); }
 716     // Count the number of characters
 717   int Freq(wxChar ch) const;
 718     // use MakeLower
 719   void LowerCase() { MakeLower(); }
 720     // use MakeUpper
 721   void UpperCase() { MakeUpper(); }
 722     // use Trim except that it doesn't change this string
 723   wxString Strip(stripType w = trailing) const;
 724
 725     // use Find (more general variants not yet supported)
 726   size_t Index(const wxChar* psz) const { return Find(psz); }
 727   size_t Index(wxChar ch)         const { return Find(ch);  }
 728     // use Truncate
 729   wxString& Remove(size_t pos) { return Truncate(pos); }
 730   wxString& RemoveLast() { return Truncate(Len() - 1); }
 731
 732   wxString& Remove(size_t nStart, size_t nLen) { return erase( nStart, nLen ); }
 733
 734     // use Find()
 735   int First( const wxChar ch ) const { return Find(ch); }
 736   int First( const wxChar* psz ) const { return Find(psz); }
 737   int First( const wxString &str ) const { return Find(str); }
 738   int Last( const wxChar ch ) const { return Find(ch, TRUE); }
 739   bool Contains(const wxString& str) const { return Find(str) != -1; }
 740
 741     // use IsEmpty()
 742   bool IsNull() const { return IsEmpty(); }
 743
 744 #ifdef  wxSTD_STRING_COMPATIBILITY
 745   // std::string compatibility functions
 746
 747   // standard types
 748   typedef wxChar value_type;
 749   typedef const value_type *const_iterator;
 750
 751   // an 'invalid' value for string index
 752   static const size_t npos;
 753
 754   // constructors
 755     // take nLen chars starting at nPos
 756   wxString(const wxString& str, size_t nPos, size_t nLen)
 757   {
 758     wxASSERT( str.GetStringData()->IsValid() );
 759     InitWith(str.c_str(), nPos, nLen == npos ? 0 : nLen);
 760   }
 761     // take all characters from pStart to pEnd
 762   wxString(const void *pStart, const void *pEnd);
 763
 764   // lib.string.capacity
 765     // return the length of the string
 766   size_t size() const { return Len(); }
 767     // return the length of the string
 768   size_t length() const { return Len(); }
 769     // return the maximum size of the string
 770   size_t max_size() const { return wxSTRING_MAXLEN; }
 771     // resize the string, filling the space with c if c != 0
 772   void resize(size_t nSize, wxChar ch = wxT('\0'));
 773     // delete the contents of the string
 774   void clear() { Empty(); }
 775     // returns true if the string is empty
 776   bool empty() const { return IsEmpty(); }
 777     // inform string about planned change in size
 778   void reserve(size_t size) { Alloc(size); }
 779
 780   // lib.string.access
 781     // return the character at position n
 782   wxChar at(size_t n) const { return GetChar(n); }
 783     // returns the writable character at position n
 784   wxChar& at(size_t n) { return GetWritableChar(n); }
 785
 786     // first valid index position
 787   const_iterator begin() const { return wx_str(); }
 788     // position one after the last valid one
 789   const_iterator end() const { return wx_str() + length(); }
 790
 791   // lib.string.modifiers
 792     // append a string
 793   wxString& append(const wxString& str)
 794     { *this += str; return *this; }
 795     // append elements str[pos], ..., str[pos+n]
 796   wxString& append(const wxString& str, size_t pos, size_t n)
 797     { ConcatSelf(n, str.c_str() + pos); return *this; }
 798     // append first n (or all if n == npos) characters of sz
 799   wxString& append(const wxChar *sz, size_t n = npos)
 800     { ConcatSelf(n == npos ? wxStrlen(sz) : n, sz); return *this; }
 801
 802     // append n copies of ch
 803   wxString& append(size_t n, wxChar ch) { return Pad(n, ch); }
 804
 805     // same as `this_string = str'
 806   wxString& assign(const wxString& str) { return (*this) = str; }
 807     // same as ` = str[pos..pos + n]
 808   wxString& assign(const wxString& str, size_t pos, size_t n)
 809     { return *this = wxString((const wxChar *)str + pos, n); }
 810     // same as `= first n (or all if n == npos) characters of sz'
 811   wxString& assign(const wxChar *sz, size_t n = npos)
 812     { return *this = wxString(sz, n); }
 813     // same as `= n copies of ch'
 814   wxString& assign(size_t n, wxChar ch)
 815     { return *this = wxString(ch, n); }
 816
 817     // insert another string
 818   wxString& insert(size_t nPos, const wxString& str);
 819     // insert n chars of str starting at nStart (in str)
 820   wxString& insert(size_t nPos, const wxString& str, size_t nStart, size_t n)
 821     { return insert(nPos, wxString((const wxChar *)str + nStart, n)); }
 822
 823     // insert first n (or all if n == npos) characters of sz
 824   wxString& insert(size_t nPos, const wxChar *sz, size_t n = npos)
 825     { return insert(nPos, wxString(sz, n)); }
 826     // insert n copies of ch
 827   wxString& insert(size_t nPos, size_t n, wxChar ch)
 828     { return insert(nPos, wxString(ch, n)); }
 829
 830     // delete characters from nStart to nStart + nLen
 831   wxString& erase(size_t nStart = 0, size_t nLen = npos);
 832
 833     // replaces the substring of length nLen starting at nStart
 834   wxString& replace(size_t nStart, size_t nLen, const wxChar* sz);
 835     // replaces the substring with nCount copies of ch
 836   wxString& replace(size_t nStart, size_t nLen, size_t nCount, wxChar ch);
 837     // replaces a substring with another substring
 838   wxString& replace(size_t nStart, size_t nLen,
 839                     const wxString& str, size_t nStart2, size_t nLen2);
 840     // replaces the substring with first nCount chars of sz
 841   wxString& replace(size_t nStart, size_t nLen,
 842                     const wxChar* sz, size_t nCount);
 843
 844     // swap two strings
 845   void swap(wxString& str);
 846
 847     // All find() functions take the nStart argument which specifies the
 848     // position to start the search on, the default value is 0. All functions
 849     // return npos if there were no match.
 850
 851     // find a substring
 852   size_t find(const wxString& str, size_t nStart = 0) const;
 853
 854   // VC++ 1.5 can't cope with this syntax.
 855 #if !defined(__VISUALC__) || defined(__WIN32__)
 856     // find first n characters of sz
 857   size_t find(const wxChar* sz, size_t nStart = 0, size_t n = npos) const;
 858 #endif // VC++ 1.5
 859
 860   // Gives a duplicate symbol (presumably a case-insensitivity problem)
 861 #if !defined(__BORLANDC__)
 862     // find the first occurence of character ch after nStart
 863   size_t find(wxChar ch, size_t nStart = 0) const;
 864 #endif
 865     // rfind() family is exactly like find() but works right to left
 866
 867     // as find, but from the end
 868   size_t rfind(const wxString& str, size_t nStart = npos) const;
 869
 870   // VC++ 1.5 can't cope with this syntax.
 871 #if !defined(__VISUALC__) || defined(__WIN32__)
 872     // as find, but from the end
 873   size_t rfind(const wxChar* sz, size_t nStart = npos,
 874           size_t n = npos) const;
 875     // as find, but from the end
 876   size_t rfind(wxChar ch, size_t nStart = npos) const;
 877 #endif // VC++ 1.5
 878
 879     // find first/last occurence of any character in the set
 880
 881     // as strpbrk() but starts at nStart, returns npos if not found
 882   size_t find_first_of(const wxString& str, size_t nStart = 0) const
 883     { return find_first_of(str.c_str(), nStart); }
 884     // same as above
 885   size_t find_first_of(const wxChar* sz, size_t nStart = 0) const;
 886     // same as find(char, size_t)
 887   size_t find_first_of(wxChar c, size_t nStart = 0) const
 888     { return find(c, nStart); }
 889     // find the last (starting from nStart) char from str in this string
 890   size_t find_last_of (const wxString& str, size_t nStart = npos) const
 891     { return find_last_of(str.c_str(), nStart); }
 892     // same as above
 893   size_t find_last_of (const wxChar* sz, size_t nStart = npos) const;
 894     // same as above
 895   size_t find_last_of(wxChar c, size_t nStart = npos) const
 896     { return rfind(c, nStart); }
 897
 898     // find first/last occurence of any character not in the set
 899
 900     // as strspn() (starting from nStart), returns npos on failure
 901   size_t find_first_not_of(const wxString& str, size_t nStart = 0) const
 902     { return find_first_not_of(str.c_str(), nStart); }
 903     // same as above
 904   size_t find_first_not_of(const wxChar* sz, size_t nStart = 0) const;
 905     // same as above
 906   size_t find_first_not_of(wxChar ch, size_t nStart = 0) const;
 907     //  as strcspn()
 908   size_t find_last_not_of(const wxString& str, size_t nStart = npos) const
 909     { return find_first_not_of(str.c_str(), nStart); }
 910     // same as above
 911   size_t find_last_not_of(const wxChar* sz, size_t nStart = npos) const;
 912     // same as above
 913   size_t find_last_not_of(wxChar ch, size_t nStart = npos) const;
 914
 915     // All compare functions return -1, 0 or 1 if the [sub]string is less,
 916     // equal or greater than the compare() argument.
 917
 918     // just like strcmp()
 919   int compare(const wxString& str) const { return Cmp(str); }
 920     // comparison with a substring
 921   int compare(size_t nStart, size_t nLen, const wxString& str) const
 922     { return Mid(nStart, nLen).Cmp(str); }
 923     // comparison of 2 substrings
 924   int compare(size_t nStart, size_t nLen,
 925               const wxString& str, size_t nStart2, size_t nLen2) const
 926     { return Mid(nStart, nLen).Cmp(str.Mid(nStart2, nLen2)); }
 927     // just like strcmp()
 928   int compare(const wxChar* sz) const { return Cmp(sz); }
 929     // substring comparison with first nCount characters of sz
 930   int compare(size_t nStart, size_t nLen,
 931               const wxChar* sz, size_t nCount = npos) const
 932     { return Mid(nStart, nLen).Cmp(wxString(sz, nCount)); }
 933
 934   // substring extraction
 935   wxString substr(size_t nStart = 0, size_t nLen = npos) const
 936     { return Mid(nStart, nLen); }
 937 #endif // wxSTD_STRING_COMPATIBILITY
 938 };
 939
 940 // ----------------------------------------------------------------------------
 941 // The string array uses it's knowledge of internal structure of the wxString
 942 // class to optimize string storage. Normally, we would store pointers to
 943 // string, but as wxString is, in fact, itself a pointer (sizeof(wxString) is
 944 // sizeof(char *)) we store these pointers instead. The cast to "wxString *" is
 945 // really all we need to turn such pointer into a string!
 946 //
 947 // Of course, it can be called a dirty hack, but we use twice less memory and
 948 // this approach is also more speed efficient, so it's probably worth it.
 949 //
 950 // Usage notes: when a string is added/inserted, a new copy of it is created,
 951 // so the original string may be safely deleted. When a string is retrieved
 952 // from the array (operator[] or Item() method), a reference is returned.
 953 // ----------------------------------------------------------------------------
 954
 955 class WXDLLEXPORT wxArrayString
 956 {
 957 public:
 958   // type of function used by wxArrayString::Sort()
 959   typedef int (*CompareFunction)(const wxString& first,
 960                                  const wxString& second);
 961
 962   // constructors and destructor
 963     // default ctor: if autoSort is TRUE, the array is always sorted (in
 964     // alphabetical order)
 965   wxArrayString(bool autoSort = FALSE);
 966     // copy ctor
 967   wxArrayString(const wxArrayString& array);
 968     // assignment operator
 969   wxArrayString& operator=(const wxArrayString& src);
 970     // not virtual, this class should not be derived from
 971  ~wxArrayString();
 972
 973   // memory management
 974     // empties the list, but doesn't release memory
 975   void Empty();
 976     // empties the list and releases memory
 977   void Clear();
 978     // preallocates memory for given number of items
 979   void Alloc(size_t nCount);
 980     // minimzes the memory usage (by freeing all extra memory)
 981   void Shrink();
 982
 983   // simple accessors
 984     // number of elements in the array
 985   size_t GetCount() const { return m_nCount; }
 986     // is it empty?
 987   bool IsEmpty() const { return m_nCount == 0; }
 988     // number of elements in the array (GetCount is preferred API)
 989   size_t Count() const { return m_nCount; }
 990
 991   // items access (range checking is done in debug version)
 992     // get item at position uiIndex
 993   wxString& Item(size_t nIndex) const
 994     { wxASSERT( nIndex < m_nCount ); return *(wxString *)&(m_pItems[nIndex]); }
 995     // same as Item()
 996   wxString& operator[](size_t nIndex) const { return Item(nIndex); }
 997     // get last item
 998   wxString& Last() const { wxASSERT( !IsEmpty() ); return Item(Count() - 1); }
 999
1000   // item management
1001     // Search the element in the array, starting from the beginning if
1002     // bFromEnd is FALSE or from end otherwise. If bCase, comparison is case
1003     // sensitive (default). Returns index of the first item matched or
1004     // wxNOT_FOUND
1005   int  Index (const wxChar *sz, bool bCase = TRUE, bool bFromEnd = FALSE) const;
1006     // add new element at the end (if the array is not sorted), return its
1007     // index
1008   size_t Add(const wxString& str);
1009     // add new element at given position
1010   void Insert(const wxString& str, size_t uiIndex);
1011     // remove first item matching this value
1012   void Remove(const wxChar *sz);
1013     // remove item by index
1014   void Remove(size_t nIndex);
1015
1016   // sorting
1017     // sort array elements in alphabetical order (or reversed alphabetical
1018     // order if reverseOrder parameter is TRUE)
1019   void Sort(bool reverseOrder = FALSE);
1020     // sort array elements using specified comparaison function
1021   void Sort(CompareFunction compareFunction);
1022
1023   // comparison
1024     // compare two arrays case sensitively
1025   bool operator==(const wxArrayString& a) const;
1026     // compare two arrays case sensitively
1027   bool operator!=(const wxArrayString& a) const { return !(*this == a); }
1028
1029 protected:
1030   void Copy(const wxArrayString& src);  // copies the contents of another array
1031
1032 private:
1033   void Grow();                          // makes array bigger if needed
1034   void Free();                          // free all the strings stored
1035
1036   void DoSort();                        // common part of all Sort() variants
1037
1038   size_t  m_nSize,    // current size of the array
1039           m_nCount;   // current number of elements
1040
1041   wxChar  **m_pItems; // pointer to data
1042
1043   bool    m_autoSort; // if TRUE, keep the array always sorted
1044 };
1045
1046 class WXDLLEXPORT wxSortedArrayString : public wxArrayString
1047 {
1048 public:
1049   wxSortedArrayString() : wxArrayString(TRUE)
1050     { }
1051   wxSortedArrayString(const wxArrayString& array) : wxArrayString(TRUE)
1052     { Copy(array); }
1053 };
1054
1055 // ---------------------------------------------------------------------------
1056 // wxString comparison functions: operator versions are always case sensitive
1057 // ---------------------------------------------------------------------------
1058
1059 //
1060 inline bool operator==(const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) == 0); }
1061 //
1062 inline bool operator==(const wxString& s1, const wxChar  * s2) { return (s1.Cmp(s2) == 0); }
1063 //
1064 inline bool operator==(const wxChar  * s1, const wxString& s2) { return (s2.Cmp(s1) == 0); }
1065 //
1066 inline bool operator!=(const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) != 0); }
1067 //
1068 inline bool operator!=(const wxString& s1, const wxChar  * s2) { return (s1.Cmp(s2) != 0); }
1069 //
1070 inline bool operator!=(const wxChar  * s1, const wxString& s2) { return (s2.Cmp(s1) != 0); }
1071 //
1072 inline bool operator< (const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) < 0); }
1073 //
1074 inline bool operator< (const wxString& s1, const wxChar  * s2) { return (s1.Cmp(s2) <  0); }
1075 //
1076 inline bool operator< (const wxChar  * s1, const wxString& s2) { return (s2.Cmp(s1) >  0); }
1077 //
1078 inline bool operator> (const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) >  0); }
1079 //
1080 inline bool operator> (const wxString& s1, const wxChar  * s2) { return (s1.Cmp(s2) >  0); }
1081 //
1082 inline bool operator> (const wxChar  * s1, const wxString& s2) { return (s2.Cmp(s1) <  0); }
1083 //
1084 inline bool operator<=(const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) <= 0); }
1085 //
1086 inline bool operator<=(const wxString& s1, const wxChar  * s2) { return (s1.Cmp(s2) <= 0); }
1087 //
1088 inline bool operator<=(const wxChar  * s1, const wxString& s2) { return (s2.Cmp(s1) >= 0); }
1089 //
1090 inline bool operator>=(const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) >= 0); }
1091 //
1092 inline bool operator>=(const wxString& s1, const wxChar  * s2) { return (s1.Cmp(s2) >= 0); }
1093 //
1094 inline bool operator>=(const wxChar  * s1, const wxString& s2) { return (s2.Cmp(s1) <= 0); }
1095
1096 // comparison with char
1097 inline bool operator==(wxChar c, const wxString& s) { return s.IsSameAs(c); }
1098 inline bool operator==(const wxString& s, wxChar c) { return s.IsSameAs(c); }
1099 inline bool operator!=(wxChar c, const wxString& s) { return !s.IsSameAs(c); }
1100 inline bool operator!=(const wxString& s, wxChar c) { return !s.IsSameAs(c); }
1101
1102 #if wxUSE_UNICODE
1103 inline bool operator==(const wxString& s1, const wxWCharBuffer& s2)
1104     { return (s1.Cmp((const wchar_t *)s2) == 0); }
1105 inline bool operator==(const wxWCharBuffer& s1, const wxString& s2)
1106     { return (s2.Cmp((const wchar_t *)s1) == 0); }
1107 inline bool operator!=(const wxString& s1, const wxWCharBuffer& s2)
1108     { return (s1.Cmp((const wchar_t *)s2) != 0); }
1109 inline bool operator!=(const wxWCharBuffer& s1, const wxString& s2)
1110     { return (s2.Cmp((const wchar_t *)s1) != 0); }
1111 #else
1112 inline bool operator==(const wxString& s1, const wxCharBuffer& s2)
1113     { return (s1.Cmp((const char *)s2) == 0); }
1114 inline bool operator==(const wxCharBuffer& s1, const wxString& s2)
1115     { return (s2.Cmp((const char *)s1) == 0); }
1116 inline bool operator!=(const wxString& s1, const wxCharBuffer& s2)
1117     { return (s1.Cmp((const char *)s2) != 0); }
1118 inline bool operator!=(const wxCharBuffer& s1, const wxString& s2)
1119     { return (s2.Cmp((const char *)s1) != 0); }
1120 #endif
1121
1122 wxString WXDLLEXPORT operator+(const wxString& string1,  const wxString& string2);
1123 wxString WXDLLEXPORT operator+(const wxString& string, wxChar ch);
1124 wxString WXDLLEXPORT operator+(wxChar ch, const wxString& string);
1125 wxString WXDLLEXPORT operator+(const wxString& string, const wxChar *psz);
1126 wxString WXDLLEXPORT operator+(const wxChar *psz, const wxString& string);
1127 #if wxUSE_UNICODE
1128 inline wxString WXDLLEXPORT operator+(const wxString& string, const wxWCharBuffer& buf)
1129     { return string + (const wchar_t *)buf; }
1130 inline wxString WXDLLEXPORT operator+(const wxWCharBuffer& buf, const wxString& string)
1131     { return (const wchar_t *)buf + string; }
1132 #else
1133 inline wxString WXDLLEXPORT operator+(const wxString& string, const wxCharBuffer& buf)
1134     { return string + (const char *)buf; }
1135 inline wxString WXDLLEXPORT operator+(const wxCharBuffer& buf, const wxString& string)
1136     { return (const char *)buf + string; }
1137 #endif
1138
1139 // ---------------------------------------------------------------------------
1140 // Implementation only from here until the end of file
1141 // ---------------------------------------------------------------------------
1142
1143 // don't pollute the library user's name space
1144 #undef ASSERT_VALID_INDEX
1145
1146 #if defined(wxSTD_STRING_COMPATIBILITY) && wxUSE_STD_IOSTREAM
1147
1148 #include "wx/ioswrap.h"
1149
1150 WXDLLEXPORT istream& operator>>(istream&, wxString&);
1151 WXDLLEXPORT ostream& operator<<(ostream&, const wxString&);
1152
1153 #endif  // wxSTD_STRING_COMPATIBILITY
1154
1155 #endif  // _WX_WXSTRINGH__