include/wx/string.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/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     wxWidgets 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(NO_GCC_PRAGMA)
  22     #pragma interface "string.h"
  23 #endif
  24
  25 // ----------------------------------------------------------------------------
  26 // headers
  27 // ----------------------------------------------------------------------------
  28
  29 #include "wx/defs.h"        // everybody should include this
  30
  31 #if defined(__WXMAC__) || defined(__VISAGECPP__)
  32     #include <ctype.h>
  33 #endif
  34
  35 #if defined(__VISAGECPP__) && __IBMCPP__ >= 400
  36    // problem in VACPP V4 with including stdlib.h multiple times
  37    // strconv includes it anyway
  38 #  include <stdio.h>
  39 #  include <string.h>
  40 #  include <stdarg.h>
  41 #  include <limits.h>
  42 #else
  43 #  include <string.h>
  44 #  include <stdio.h>
  45 #  include <stdarg.h>
  46 #  include <limits.h>
  47 #  include <stdlib.h>
  48 #endif
  49
  50 #ifdef HAVE_STRCASECMP_IN_STRINGS_H
  51     #include <strings.h>    // for strcasecmp()
  52 #endif // HAVE_STRCASECMP_IN_STRINGS_H
  53
  54 #include "wx/wxchar.h"      // for wxChar
  55 #include "wx/buffer.h"      // for wxCharBuffer
  56 #include "wx/strconv.h"     // for wxConvertXXX() macros and wxMBConv classes
  57
  58 // ---------------------------------------------------------------------------
  59 // macros
  60 // ---------------------------------------------------------------------------
  61
  62 // casts [unfortunately!] needed to call some broken functions which require
  63 // "char *" instead of "const char *"
  64 #define   WXSTRINGCAST (wxChar *)(const wxChar *)
  65 #define   wxCSTRINGCAST (wxChar *)(const wxChar *)
  66 #define   wxMBSTRINGCAST (char *)(const char *)
  67 #define   wxWCSTRINGCAST (wchar_t *)(const wchar_t *)
  68
  69 // implementation only
  70 #define   wxASSERT_VALID_INDEX(i) \
  71     wxASSERT_MSG( (size_t)(i) <= length(), _T("invalid index in wxString") )
  72
  73 // ----------------------------------------------------------------------------
  74 // constants
  75 // ----------------------------------------------------------------------------
  76
  77 #if defined(__VISAGECPP__) && __IBMCPP__ >= 400
  78 // must define this static for VA or else you get multiply defined symbols everywhere
  79 extern const unsigned int wxSTRING_MAXLEN;
  80
  81 #else
  82 // maximum possible length for a string means "take all string" everywhere
  83 //  (as sizeof(StringData) is unknown here, we substract 100)
  84 const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100;
  85
  86 #endif
  87
  88 // ----------------------------------------------------------------------------
  89 // global data
  90 // ----------------------------------------------------------------------------
  91
  92 // global pointer to empty string
  93 extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxEmptyString;
  94
  95 // ---------------------------------------------------------------------------
  96 // global functions complementing standard C string library replacements for
  97 // strlen() and portable strcasecmp()
  98 //---------------------------------------------------------------------------
  99
 100 // Use wxXXX() functions from wxchar.h instead! These functions are for
 101 // backwards compatibility only.
 102
 103 // checks whether the passed in pointer is NULL and if the string is empty
 104 inline bool IsEmpty(const char *p) { return (!p || !*p); }
 105
 106 // safe version of strlen() (returns 0 if passed NULL pointer)
 107 inline size_t Strlen(const char *psz)
 108   { return psz ? strlen(psz) : 0; }
 109
 110 // portable strcasecmp/_stricmp
 111 inline int Stricmp(const char *psz1, const char *psz2)
 112 {
 113 #if defined(__VISUALC__) && defined(__WXWINCE__)
 114   register char c1, c2;
 115   do {
 116     c1 = tolower(*psz1++);
 117     c2 = tolower(*psz2++);
 118   } while ( c1 && (c1 == c2) );
 119
 120   return c1 - c2;
 121 #elif defined(__VISUALC__) || ( defined(__MWERKS__) && defined(__INTEL__) )
 122   return _stricmp(psz1, psz2);
 123 #elif defined(__SC__)
 124   return _stricmp(psz1, psz2);
 125 #elif defined(__SALFORDC__)
 126   return stricmp(psz1, psz2);
 127 #elif defined(__BORLANDC__)
 128   return stricmp(psz1, psz2);
 129 #elif defined(__WATCOMC__)
 130   return stricmp(psz1, psz2);
 131 #elif defined(__DJGPP__)
 132   return stricmp(psz1, psz2);
 133 #elif defined(__EMX__)
 134   return stricmp(psz1, psz2);
 135 #elif defined(__WXPM__)
 136   return stricmp(psz1, psz2);
 137 #elif defined(HAVE_STRCASECMP_IN_STRING_H) || \
 138       defined(HAVE_STRCASECMP_IN_STRINGS_H) || \
 139       defined(__GNUWIN32__)
 140   return strcasecmp(psz1, psz2);
 141 #elif defined(__MWERKS__) && !defined(__INTEL__)
 142   register char c1, c2;
 143   do {
 144     c1 = tolower(*psz1++);
 145     c2 = tolower(*psz2++);
 146   } while ( c1 && (c1 == c2) );
 147
 148   return c1 - c2;
 149 #else
 150   // almost all compilers/libraries provide this function (unfortunately under
 151   // different names), that's why we don't implement our own which will surely
 152   // be more efficient than this code (uncomment to use):
 153   /*
 154     register char c1, c2;
 155     do {
 156       c1 = tolower(*psz1++);
 157       c2 = tolower(*psz2++);
 158     } while ( c1 && (c1 == c2) );
 159
 160     return c1 - c2;
 161   */
 162
 163   #error  "Please define string case-insensitive compare for your OS/compiler"
 164 #endif  // OS/compiler
 165 }
 166
 167 // return an empty wxString
 168 class WXDLLIMPEXP_BASE wxString; // not yet defined
 169 inline const wxString& wxGetEmptyString() { return *(wxString *)&wxEmptyString; }
 170
 171 #if wxUSE_STL
 172
 173 #include "wx/beforestd.h"
 174 #include <string>
 175 #include "wx/afterstd.h"
 176
 177 #if wxUSE_UNICODE
 178     #ifdef HAVE_STD_WSTRING
 179         typedef std::wstring wxStringBase;
 180     #else
 181         typedef std::basic_string<wxChar> wxStringBase;
 182     #endif
 183 #else
 184     typedef std::string wxStringBase;
 185 #endif
 186
 187 #if (defined(__GNUG__) && (__GNUG__ < 3)) || \
 188     (defined(_MSC_VER) && (_MSC_VER <= 1200))
 189     #define wxSTRING_BASE_HASNT_CLEAR
 190 #endif
 191
 192 #else // if !wxUSE_STL
 193
 194 #ifndef HAVE_STD_STRING_COMPARE
 195     #define HAVE_STD_STRING_COMPARE
 196 #endif
 197
 198 // ---------------------------------------------------------------------------
 199 // string data prepended with some housekeeping info (used by wxString class),
 200 // is never used directly (but had to be put here to allow inlining)
 201 // ---------------------------------------------------------------------------
 202
 203 struct WXDLLIMPEXP_BASE wxStringData
 204 {
 205   int     nRefs;        // reference count
 206   size_t  nDataLength,  // actual string length
 207           nAllocLength; // allocated memory size
 208
 209   // mimics declaration 'wxChar data[nAllocLength]'
 210   wxChar* data() const { return (wxChar*)(this + 1); }
 211
 212   // empty string has a special ref count so it's never deleted
 213   bool  IsEmpty()   const { return (nRefs == -1); }
 214   bool  IsShared()  const { return (nRefs > 1);   }
 215
 216   // lock/unlock
 217   void  Lock()   { if ( !IsEmpty() ) nRefs++;                    }
 218
 219   // VC++ will refuse to inline Unlock but profiling shows that it is wrong
 220 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
 221   __forceinline
 222 #endif
 223   // VC++ free must take place in same DLL as allocation when using non dll
 224   // run-time library (e.g. Multithreaded instead of Multithreaded DLL)
 225 #if defined(__VISUALC__) && defined(_MT) && !defined(_DLL)
 226   void  Unlock() { if ( !IsEmpty() && --nRefs == 0) Free();  }
 227   // we must not inline deallocation since allocation is not inlined
 228   void  Free();
 229 #else
 230   void  Unlock() { if ( !IsEmpty() && --nRefs == 0) free(this);  }
 231 #endif
 232
 233   // if we had taken control over string memory (GetWriteBuf), it's
 234   // intentionally put in invalid state
 235   void  Validate(bool b)  { nRefs = (b ? 1 : 0); }
 236   bool  IsValid() const   { return (nRefs != 0); }
 237 };
 238
 239 class WXDLLIMPEXP_BASE wxStringBase
 240 {
 241 #if !wxUSE_STL
 242 friend class WXDLLIMPEXP_BASE wxArrayString;
 243 #endif
 244 public :
 245   // an 'invalid' value for string index, moved to this place due to a CW bug
 246   static const size_t npos;
 247 protected:
 248   // points to data preceded by wxStringData structure with ref count info
 249   wxChar *m_pchData;
 250
 251   // accessor to string data
 252   wxStringData* GetStringData() const { return (wxStringData*)m_pchData - 1; }
 253
 254   // string (re)initialization functions
 255     // initializes the string to the empty value (must be called only from
 256     // ctors, use Reinit() otherwise)
 257   void Init() { m_pchData = (wxChar *)wxEmptyString; }
 258     // initializaes the string with (a part of) C-string
 259   void InitWith(const wxChar *psz, size_t nPos = 0, size_t nLen = npos);
 260     // as Init, but also frees old data
 261   void Reinit() { GetStringData()->Unlock(); Init(); }
 262
 263   // memory allocation
 264     // allocates memory for string of length nLen
 265   bool AllocBuffer(size_t nLen);
 266     // copies data to another string
 267   bool AllocCopy(wxString&, int, int) const;
 268     // effectively copies data to string
 269   bool AssignCopy(size_t, const wxChar *);
 270
 271   // append a (sub)string
 272   bool ConcatSelf(size_t nLen, const wxChar *src, size_t nMaxLen);
 273   bool ConcatSelf(size_t nLen, const wxChar *src)
 274     { return ConcatSelf(nLen, src, nLen); }
 275
 276   // functions called before writing to the string: they copy it if there
 277   // are other references to our data (should be the only owner when writing)
 278   bool CopyBeforeWrite();
 279   bool AllocBeforeWrite(size_t);
 280
 281     // compatibility with wxString
 282   bool Alloc(size_t nLen);
 283 public:
 284   // standard types
 285   typedef wxChar value_type;
 286   typedef wxChar char_type;
 287   typedef size_t size_type;
 288   typedef value_type& reference;
 289   typedef const value_type& const_reference;
 290   typedef value_type* pointer;
 291   typedef const value_type* const_pointer;
 292   typedef value_type *iterator;
 293   typedef const value_type *const_iterator;
 294
 295   // constructors and destructor
 296     // ctor for an empty string
 297   wxStringBase() { Init(); }
 298     // copy ctor
 299   wxStringBase(const wxStringBase& stringSrc)
 300   {
 301     wxASSERT_MSG( stringSrc.GetStringData()->IsValid(),
 302                   _T("did you forget to call UngetWriteBuf()?") );
 303
 304     if ( stringSrc.empty() ) {
 305       // nothing to do for an empty string
 306       Init();
 307     }
 308     else {
 309       m_pchData = stringSrc.m_pchData;            // share same data
 310       GetStringData()->Lock();                    // => one more copy
 311     }
 312   }
 313     // string containing nRepeat copies of ch
 314   wxStringBase(size_type nRepeat, wxChar ch);
 315     // ctor takes first nLength characters from C string
 316     // (default value of npos means take all the string)
 317   wxStringBase(const wxChar *psz)
 318       { InitWith(psz, 0, npos); }
 319   wxStringBase(const wxChar *psz, size_t nLength)
 320       { InitWith(psz, 0, nLength); }
 321   wxStringBase(const wxChar *psz, wxMBConv& WXUNUSED(conv), size_t nLength = npos)
 322       { InitWith(psz, 0, nLength); }
 323     // take nLen chars starting at nPos
 324   wxStringBase(const wxStringBase& str, size_t nPos, size_t nLen)
 325   {
 326     wxASSERT_MSG( str.GetStringData()->IsValid(),
 327                   _T("did you forget to call UngetWriteBuf()?") );
 328     Init();
 329     size_t strLen = str.length() - nPos; nLen = strLen < nLen ? strLen : nLen;
 330     InitWith(str.c_str(), nPos, nLen);
 331   }
 332     // take all characters from pStart to pEnd
 333   wxStringBase(const void *pStart, const void *pEnd);
 334
 335     // dtor is not virtual, this class must not be inherited from!
 336   ~wxStringBase()
 337   {
 338 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
 339       //RN - according to the above VC++ does indeed inline this,
 340       //even though it spits out two warnings
 341       #pragma warning (disable:4714)
 342 #endif
 343
 344       GetStringData()->Unlock();
 345   }
 346
 347 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
 348     //re-enable inlining warning
 349     #pragma warning (default:4714)
 350 #endif
 351   // overloaded assignment
 352     // from another wxString
 353   wxStringBase& operator=(const wxStringBase& stringSrc);
 354     // from a character
 355   wxStringBase& operator=(wxChar ch);
 356     // from a C string
 357   wxStringBase& operator=(const wxChar *psz);
 358
 359     // return the length of the string
 360   size_type size() const { return GetStringData()->nDataLength; }
 361     // return the length of the string
 362   size_type length() const { return size(); }
 363     // return the maximum size of the string
 364   size_type max_size() const { return wxSTRING_MAXLEN; }
 365     // resize the string, filling the space with c if c != 0
 366   void resize(size_t nSize, wxChar ch = wxT('\0'));
 367     // delete the contents of the string
 368   void clear() { erase(0, npos); }
 369     // returns true if the string is empty
 370   bool empty() const { return size() == 0; }
 371     // inform string about planned change in size
 372   void reserve(size_t sz) { Alloc(sz); }
 373   size_type capacity() const { return GetStringData()->nAllocLength; }
 374
 375   // lib.string.access
 376     // return the character at position n
 377   value_type at(size_type n) const
 378     { wxASSERT_VALID_INDEX( n ); return m_pchData[n]; }
 379   value_type operator[](size_type n) const { return at(n); }
 380     // returns the writable character at position n
 381   reference at(size_type n)
 382     { wxASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 383   reference operator[](size_type n)
 384     { wxASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
 385
 386   // lib.string.modifiers
 387     // append elements str[pos], ..., str[pos+n]
 388   wxStringBase& append(const wxStringBase& str, size_t pos, size_t n)
 389   {
 390     wxASSERT(pos <= str.length());
 391     ConcatSelf(n, str.c_str() + pos, str.length() - pos);
 392     return *this;
 393   }
 394     // append a string
 395   wxStringBase& append(const wxStringBase& str)
 396     { ConcatSelf(str.length(), str.c_str()); return *this; }
 397     // append first n (or all if n == npos) characters of sz
 398   wxStringBase& append(const wxChar *sz)
 399     { ConcatSelf(wxStrlen(sz), sz); return *this; }
 400   wxStringBase& append(const wxChar *sz, size_t n)
 401     { ConcatSelf(n, sz); return *this; }
 402     // append n copies of ch
 403   wxStringBase& append(size_t n, wxChar ch);
 404     // append from first to last
 405   wxStringBase& append(const_iterator first, const_iterator last)
 406     { ConcatSelf(last - first, first); return *this; }
 407
 408     // same as `this_string = str'
 409   wxStringBase& assign(const wxStringBase& str)
 410     { return *this = str; }
 411     // same as ` = str[pos..pos + n]
 412   wxStringBase& assign(const wxStringBase& str, size_t pos, size_t n)
 413     { clear(); return append(str, pos, n); }
 414     // same as `= first n (or all if n == npos) characters of sz'
 415   wxStringBase& assign(const wxChar *sz)
 416     { clear(); return append(sz, wxStrlen(sz)); }
 417   wxStringBase& assign(const wxChar *sz, size_t n)
 418     { clear(); return append(sz, n); }
 419     // same as `= n copies of ch'
 420   wxStringBase& assign(size_t n, wxChar ch)
 421     { clear(); return append(n, ch); }
 422     // assign from first to last
 423   wxStringBase& assign(const_iterator first, const_iterator last)
 424     { clear(); return append(first, last); }
 425
 426     // first valid index position
 427   const_iterator begin() const { return m_pchData; }
 428     // position one after the last valid one
 429   const_iterator end() const { return m_pchData + length(); }
 430
 431   // first valid index position
 432   iterator begin();
 433   // position one after the last valid one
 434   iterator end();
 435
 436     // insert another string
 437   wxStringBase& insert(size_t nPos, const wxStringBase& str)
 438   {
 439     wxASSERT( str.GetStringData()->IsValid() );
 440     return insert(nPos, str.c_str(), str.length());
 441   }
 442     // insert n chars of str starting at nStart (in str)
 443   wxStringBase& insert(size_t nPos, const wxStringBase& str, size_t nStart, size_t n)
 444   {
 445     wxASSERT( str.GetStringData()->IsValid() );
 446     wxASSERT( nStart < str.length() );
 447     size_t strLen = str.length() - nStart;
 448     n = strLen < n ? strLen : n;
 449     return insert(nPos, str.c_str() + nStart, n);
 450   }
 451     // insert first n (or all if n == npos) characters of sz
 452   wxStringBase& insert(size_t nPos, const wxChar *sz, size_t n = npos);
 453     // insert n copies of ch
 454   wxStringBase& insert(size_t nPos, size_t n, wxChar ch)
 455     { return insert(nPos, wxStringBase(n, ch)); }
 456   iterator insert(iterator it, wxChar ch)
 457     { size_t idx = it - begin(); insert(idx, 1, ch); return begin() + idx; }
 458   void insert(iterator it, const_iterator first, const_iterator last)
 459     { insert(it - begin(), first, last - first); }
 460   void insert(iterator it, size_type n, wxChar ch)
 461     { insert(it - begin(), n, ch); }
 462
 463     // delete characters from nStart to nStart + nLen
 464   wxStringBase& erase(size_type pos = 0, size_type n = npos);
 465   iterator erase(iterator first, iterator last)
 466   {
 467     size_t idx = first - begin();
 468     erase(idx, last - first);
 469     return begin() + idx;
 470   }
 471   iterator erase(iterator first);
 472
 473   // explicit conversion to C string (use this with printf()!)
 474   const wxChar* c_str() const { return m_pchData; }
 475   const wxChar* data() const { return m_pchData; }
 476
 477     // replaces the substring of length nLen starting at nStart
 478   wxStringBase& replace(size_t nStart, size_t nLen, const wxChar* sz);
 479     // replaces the substring of length nLen starting at nStart
 480   wxStringBase& replace(size_t nStart, size_t nLen, const wxStringBase& str)
 481     { return replace(nStart, nLen, str.c_str()); }
 482     // replaces the substring with nCount copies of ch
 483   wxStringBase& replace(size_t nStart, size_t nLen, size_t nCount, wxChar ch);
 484     // replaces a substring with another substring
 485   wxStringBase& replace(size_t nStart, size_t nLen,
 486                         const wxStringBase& str, size_t nStart2, size_t nLen2);
 487     // replaces the substring with first nCount chars of sz
 488   wxStringBase& replace(size_t nStart, size_t nLen,
 489                         const wxChar* sz, size_t nCount);
 490   wxStringBase& replace(iterator first, iterator last, const_pointer s)
 491     { return replace(first - begin(), last - first, s); }
 492   wxStringBase& replace(iterator first, iterator last, const_pointer s,
 493                         size_type n)
 494     { return replace(first - begin(), last - first, s, n); }
 495   wxStringBase& replace(iterator first, iterator last, const wxStringBase& s)
 496     { return replace(first - begin(), last - first, s); }
 497   wxStringBase& replace(iterator first, iterator last, size_type n, wxChar c)
 498     { return replace(first - begin(), last - first, n, c); }
 499   wxStringBase& replace(iterator first, iterator last,
 500                         const_iterator first1, const_iterator last1)
 501     { return replace(first - begin(), last - first, first1, last1 - first1); }
 502
 503     // swap two strings
 504   void swap(wxStringBase& str);
 505
 506     // All find() functions take the nStart argument which specifies the
 507     // position to start the search on, the default value is 0. All functions
 508     // return npos if there were no match.
 509
 510     // find a substring
 511   size_t find(const wxStringBase& str, size_t nStart = 0) const;
 512
 513   // VC++ 1.5 can't cope with this syntax.
 514 #if !defined(__VISUALC__) || defined(__WIN32__)
 515     // find first n characters of sz
 516   size_t find(const wxChar* sz, size_t nStart = 0, size_t n = npos) const;
 517 #endif // VC++ 1.5
 518
 519     // find the first occurence of character ch after nStart
 520   size_t find(wxChar ch, size_t nStart = 0) const;
 521
 522     // rfind() family is exactly like find() but works right to left
 523
 524     // as find, but from the end
 525   size_t rfind(const wxStringBase& str, size_t nStart = npos) const;
 526
 527   // VC++ 1.5 can't cope with this syntax.
 528     // as find, but from the end
 529   size_t rfind(const wxChar* sz, size_t nStart = npos,
 530                size_t n = npos) const;
 531     // as find, but from the end
 532   size_t rfind(wxChar ch, size_t nStart = npos) const;
 533
 534     // find first/last occurence of any character in the set
 535
 536     // as strpbrk() but starts at nStart, returns npos if not found
 537   size_t find_first_of(const wxStringBase& str, size_t nStart = 0) const
 538     { return find_first_of(str.c_str(), nStart); }
 539     // same as above
 540   size_t find_first_of(const wxChar* sz, size_t nStart = 0) const;
 541   size_t find_first_of(const wxChar* sz, size_t nStart, size_t n) const;
 542     // same as find(char, size_t)
 543   size_t find_first_of(wxChar c, size_t nStart = 0) const
 544     { return find(c, nStart); }
 545     // find the last (starting from nStart) char from str in this string
 546   size_t find_last_of (const wxStringBase& str, size_t nStart = npos) const
 547     { return find_last_of(str.c_str(), nStart); }
 548     // same as above
 549   size_t find_last_of (const wxChar* sz, size_t nStart = npos) const;
 550   size_t find_last_of(const wxChar* sz, size_t nStart, size_t n) const;
 551     // same as above
 552   size_t find_last_of(wxChar c, size_t nStart = npos) const
 553     { return rfind(c, nStart); }
 554
 555     // find first/last occurence of any character not in the set
 556
 557     // as strspn() (starting from nStart), returns npos on failure
 558   size_t find_first_not_of(const wxStringBase& str, size_t nStart = 0) const
 559     { return find_first_not_of(str.c_str(), nStart); }
 560     // same as above
 561   size_t find_first_not_of(const wxChar* sz, size_t nStart = 0) const;
 562   size_t find_first_not_of(const wxChar* sz, size_t nStart, size_t n) const;
 563     // same as above
 564   size_t find_first_not_of(wxChar ch, size_t nStart = 0) const;
 565     //  as strcspn()
 566   size_t find_last_not_of(const wxStringBase& str, size_t nStart = npos) const
 567     { return find_last_not_of(str.c_str(), nStart); }
 568     // same as above
 569   size_t find_last_not_of(const wxChar* sz, size_t nStart = npos) const;
 570   size_t find_last_not_of(const wxChar* sz, size_t nStart, size_t n) const;
 571     // same as above
 572   size_t find_last_not_of(wxChar ch, size_t nStart = npos) const;
 573
 574     // All compare functions return -1, 0 or 1 if the [sub]string is less,
 575     // equal or greater than the compare() argument.
 576
 577     // just like strcmp()
 578   int compare(const wxStringBase& str) const
 579     { return wxStrcmp(c_str(), str.c_str()); }
 580     // comparison with a substring
 581   int compare(size_t nStart, size_t nLen, const wxStringBase& str) const;
 582     // comparison of 2 substrings
 583   int compare(size_t nStart, size_t nLen,
 584               const wxStringBase& str, size_t nStart2, size_t nLen2) const;
 585     // just like strcmp()
 586   int compare(const wxChar* sz) const
 587     { return wxStrcmp(c_str(), sz); }
 588     // substring comparison with first nCount characters of sz
 589   int compare(size_t nStart, size_t nLen,
 590               const wxChar* sz, size_t nCount = npos) const;
 591
 592   size_type copy(wxChar* s, size_type n, size_type pos = 0);
 593
 594   // substring extraction
 595   wxStringBase substr(size_t nStart = 0, size_t nLen = npos) const;
 596
 597       // string += string
 598   wxStringBase& operator+=(const wxStringBase& s) { return append(s); }
 599       // string += C string
 600   wxStringBase& operator+=(const wxChar *psz) { return append(psz); }
 601       // string += char
 602   wxStringBase& operator+=(wxChar ch) { return append(1, ch); }
 603 };
 604
 605 #endif // !wxUSE_STL
 606
 607 // ---------------------------------------------------------------------------
 608 // This is (yet another one) String class for C++ programmers. It doesn't use
 609 // any of "advanced" C++ features (i.e. templates, exceptions, namespaces...)
 610 // thus you should be able to compile it with practicaly any C++ compiler.
 611 // This class uses copy-on-write technique, i.e. identical strings share the
 612 // same memory as long as neither of them is changed.
 613 //
 614 // This class aims to be as compatible as possible with the new standard
 615 // std::string class, but adds some additional functions and should be at
 616 // least as efficient than the standard implementation.
 617 //
 618 // Performance note: it's more efficient to write functions which take "const
 619 // String&" arguments than "const char *" if you assign the argument to
 620 // another string.
 621 //
 622 // It was compiled and tested under Win32, Linux (libc 5 & 6), Solaris 5.5.
 623 //
 624 // To do:
 625 //  - ressource support (string tables in ressources)
 626 //  - more wide character (UNICODE) support
 627 //  - regular expressions support
 628 // ---------------------------------------------------------------------------
 629
 630 class WXDLLIMPEXP_BASE wxString : public wxStringBase
 631 {
 632 #if !wxUSE_STL
 633 friend class WXDLLIMPEXP_BASE wxArrayString;
 634 #endif
 635
 636   // NB: special care was taken in arranging the member functions in such order
 637   //     that all inline functions can be effectively inlined, verify that all
 638   //     performace critical functions are still inlined if you change order!
 639 private:
 640   // if we hadn't made these operators private, it would be possible to
 641   // compile "wxString s; s = 17;" without any warnings as 17 is implicitly
 642   // converted to char in C and we do have operator=(char)
 643   //
 644   // NB: we don't need other versions (short/long and unsigned) as attempt
 645   //     to assign another numeric type to wxString will now result in
 646   //     ambiguity between operator=(char) and operator=(int)
 647   wxString& operator=(int);
 648
 649   // these methods are not implemented - there is _no_ conversion from int to
 650   // string, you're doing something wrong if the compiler wants to call it!
 651   //
 652   // try `s << i' or `s.Printf("%d", i)' instead
 653   wxString(int);
 654
 655 public:
 656   // constructors and destructor
 657     // ctor for an empty string
 658   wxString() : wxStringBase() { }
 659     // copy ctor
 660   wxString(const wxStringBase& stringSrc) : wxStringBase(stringSrc) { }
 661   wxString(const wxString& stringSrc) : wxStringBase(stringSrc) { }
 662     // string containing nRepeat copies of ch
 663   wxString(wxChar ch, size_t nRepeat = 1)
 664       : wxStringBase(nRepeat, ch) { }
 665   wxString(size_t nRepeat, wxChar ch)
 666       : wxStringBase(nRepeat, ch) { }
 667     // ctor takes first nLength characters from C string
 668     // (default value of npos means take all the string)
 669   wxString(const wxChar *psz)
 670       : wxStringBase(psz ? psz : wxT("")) { }
 671   wxString(const wxChar *psz, size_t nLength)
 672       : wxStringBase(psz, nLength) { }
 673   wxString(const wxChar *psz, wxMBConv& WXUNUSED(conv), size_t nLength = npos)
 674       : wxStringBase(psz, nLength == npos ? wxStrlen(psz) : nLength) { }
 675
 676 #if wxUSE_UNICODE
 677     // from multibyte string
 678   wxString(const char *psz, wxMBConv& conv, size_t nLength = npos);
 679     // from wxWCharBuffer (i.e. return from wxGetString)
 680   wxString(const wxWCharBuffer& psz) : wxStringBase(psz.data()) { }
 681 #else // ANSI
 682     // from C string (for compilers using unsigned char)
 683   wxString(const unsigned char* psz, size_t nLength = npos)
 684       : wxStringBase((const char*)psz, nLength) { }
 685
 686 #if wxUSE_WCHAR_T
 687     // from wide (Unicode) string
 688   wxString(const wchar_t *pwz, wxMBConv& conv = wxConvLibc, size_t nLength = npos);
 689 #endif // !wxUSE_WCHAR_T
 690
 691     // from wxCharBuffer
 692   wxString(const wxCharBuffer& psz)
 693       : wxStringBase(psz) { }
 694 #endif // Unicode/ANSI
 695
 696   // generic attributes & operations
 697     // as standard strlen()
 698   size_t Len() const { return length(); }
 699     // string contains any characters?
 700   bool IsEmpty() const { return empty(); }
 701     // empty string is "false", so !str will return true
 702   bool operator!() const { return IsEmpty(); }
 703     // truncate the string to given length
 704   wxString& Truncate(size_t uiLen);
 705     // empty string contents
 706   void Empty()
 707   {
 708     Truncate(0);
 709
 710     wxASSERT_MSG( IsEmpty(), _T("string not empty after call to Empty()?") );
 711   }
 712     // empty the string and free memory
 713   void Clear()
 714   {
 715     wxString tmp(wxEmptyString);
 716     swap(tmp);
 717   }
 718
 719   // contents test
 720     // Is an ascii value
 721   bool IsAscii() const;
 722     // Is a number
 723   bool IsNumber() const;
 724     // Is a word
 725   bool IsWord() const;
 726
 727   // data access (all indexes are 0 based)
 728     // read access
 729     wxChar  GetChar(size_t n) const
 730       { return operator[](n); }
 731     // read/write access
 732     wxChar& GetWritableChar(size_t n)
 733       { return operator[](n); }
 734     // write access
 735     void  SetChar(size_t n, wxChar ch)
 736       { operator[](n) = ch; }
 737
 738     // get last character
 739     wxChar  Last() const
 740       {
 741           wxASSERT_MSG( !IsEmpty(), _T("wxString: index out of bounds") );
 742
 743           return operator[](length() - 1);
 744       }
 745
 746     // get writable last character
 747     wxChar& Last()
 748       {
 749           wxASSERT_MSG( !IsEmpty(), _T("wxString: index out of bounds") );
 750           return operator[](length() - 1);
 751       }
 752
 753     /*
 754         So why do we have all these overloaded operator[]s? A bit of history:
 755         initially there was only one of them, taking size_t. Then people
 756         started complaining because they wanted to use ints as indices (I
 757         wonder why) and compilers were giving warnings about it, so we had to
 758         add the operator[](int). Then it became apparent that you couldn't
 759         write str[0] any longer because there was ambiguity between two
 760         overloads and so you now had to write str[0u] (or, of course, use the
 761         explicit casts to either int or size_t but nobody did this).
 762
 763         Finally, someone decided to compile wxWin on an Alpha machine and got
 764         a surprize: str[0u] didn't compile there because it is of type
 765         unsigned int and size_t is unsigned _long_ on Alpha and so there was
 766         ambiguity between converting uint to int or ulong. To fix this one we
 767         now add operator[](uint) for the machines where size_t is not already
 768         the same as unsigned int - hopefully this fixes the problem (for some
 769         time)
 770
 771         The only real fix is, of course, to remove all versions but the one
 772         taking size_t...
 773      */
 774
 775     // operator version of GetChar
 776     wxChar  operator[](int n) const
 777       { return wxStringBase::operator[](n); }
 778     wxChar& operator[](size_type n)
 779       { return wxStringBase::operator[](n); }
 780     wxChar operator[](size_type n) const
 781       { return wxStringBase::operator[](n); }
 782 #ifndef wxSIZE_T_IS_UINT
 783     // operator version of GetChar
 784     wxChar operator[](unsigned int n) const
 785       { return wxStringBase::operator[](n); }
 786
 787     // operator version of GetWriteableChar
 788     wxChar& operator[](unsigned int n)
 789       { return wxStringBase::operator[](n); }
 790 #endif // size_t != unsigned int
 791
 792     // implicit conversion to C string
 793     operator const wxChar*() const { return c_str(); }
 794
 795     // identical to c_str(), for wxWin 1.6x compatibility
 796     const wxChar* wx_str()  const { return c_str(); }
 797     // identical to c_str(), for MFC compatibility
 798     const wxChar* GetData() const { return c_str(); }
 799
 800     // conversion to/from plain (i.e. 7 bit) ASCII: this is useful for
 801     // converting numbers or strings which are certain not to contain special
 802     // chars (typically system functions, X atoms, environment variables etc.)
 803     //
 804     // the behaviour of these functions with the strings containing anything
 805     // else than 7 bit ASCII characters is undefined, use at your own risk.
 806 #if wxUSE_UNICODE
 807     static wxString FromAscii(const char *ascii);  // string
 808     static wxString FromAscii(const char ascii);   // char
 809     const wxCharBuffer ToAscii() const;
 810 #else // ANSI
 811     static wxString FromAscii(const char *ascii) { return wxString( ascii ); }
 812     static wxString FromAscii(const char ascii) { return wxString( ascii ); }
 813     const char *ToAscii() const { return c_str(); }
 814 #endif // Unicode/!Unicode
 815
 816     // conversions with (possible) format conversions: have to return a
 817     // buffer with temporary data
 818     //
 819     // the functions defined (in either Unicode or ANSI) mode are mb_str() to
 820     // return an ANSI (multibyte) string, wc_str() to return a wide string and
 821     // fn_str() to return a string which should be used with the OS APIs
 822     // accepting the file names. The return value is always the same, but the
 823     // type differs because a function may either return pointer to the buffer
 824     // directly or have to use intermediate buffer for translation.
 825 #if wxUSE_UNICODE
 826     const wxCharBuffer mb_str(wxMBConv& conv = wxConvLibc) const
 827         { return conv.cWC2MB(c_str()); }
 828
 829     const wxWX2MBbuf mbc_str() const { return mb_str(*wxConvCurrent); }
 830
 831     const wxChar* wc_str() const { return c_str(); }
 832
 833     // for compatibility with !wxUSE_UNICODE version
 834     const wxChar* wc_str(wxMBConv& WXUNUSED(conv)) const { return c_str(); }
 835
 836 #if wxMBFILES
 837     const wxCharBuffer fn_str() const { return mb_str(wxConvFile); }
 838 #else // !wxMBFILES
 839     const wxChar* fn_str() const { return c_str(); }
 840 #endif // wxMBFILES/!wxMBFILES
 841 #else // ANSI
 842     const wxChar* mb_str() const { return c_str(); }
 843
 844     // for compatibility with wxUSE_UNICODE version
 845     const wxChar* mb_str(wxMBConv& WXUNUSED(conv)) const { return c_str(); }
 846
 847     const wxWX2MBbuf mbc_str() const { return mb_str(); }
 848
 849 #if wxUSE_WCHAR_T
 850     const wxWCharBuffer wc_str(wxMBConv& conv) const
 851         { return conv.cMB2WC(c_str()); }
 852 #endif // wxUSE_WCHAR_T
 853
 854     const wxChar* fn_str() const { return c_str(); }
 855 #endif // Unicode/ANSI
 856
 857   // overloaded assignment
 858     // from another wxString
 859   wxString& operator=(const wxStringBase& stringSrc)
 860     { return (wxString&)wxStringBase::operator=(stringSrc); }
 861     // from a character
 862   wxString& operator=(wxChar ch)
 863     { return (wxString&)wxStringBase::operator=(ch); }
 864     // from a C string
 865   wxString& operator=(const wxChar *psz)
 866     { return (wxString&)wxStringBase::operator=(psz); }
 867 #if wxUSE_UNICODE
 868     // from wxWCharBuffer
 869   wxString& operator=(const wxWCharBuffer& psz)
 870     { (void) operator=((const wchar_t *)psz); return *this; }
 871 #else // ANSI
 872     // from another kind of C string
 873   wxString& operator=(const unsigned char* psz);
 874 #if wxUSE_WCHAR_T
 875     // from a wide string
 876   wxString& operator=(const wchar_t *pwz);
 877 #endif
 878     // from wxCharBuffer
 879   wxString& operator=(const wxCharBuffer& psz)
 880     { (void) operator=((const char *)psz); return *this; }
 881 #endif // Unicode/ANSI
 882
 883   // string concatenation
 884     // in place concatenation
 885     /*
 886         Concatenate and return the result. Note that the left to right
 887         associativity of << allows to write things like "str << str1 << str2
 888         << ..." (unlike with +=)
 889      */
 890       // string += string
 891   wxString& operator<<(const wxString& s)
 892   {
 893 #if !wxUSE_STL
 894     wxASSERT_MSG( s.GetStringData()->IsValid(),
 895                   _T("did you forget to call UngetWriteBuf()?") );
 896 #endif
 897
 898     append(s);
 899     return *this;
 900   }
 901       // string += C string
 902   wxString& operator<<(const wxChar *psz)
 903     { append(psz); return *this; }
 904       // string += char
 905   wxString& operator<<(wxChar ch) { append(1, ch); return *this; }
 906
 907       // string += buffer (i.e. from wxGetString)
 908 #if wxUSE_UNICODE
 909   wxString& operator<<(const wxWCharBuffer& s)
 910     { (void)operator<<((const wchar_t *)s); return *this; }
 911   void operator+=(const wxWCharBuffer& s)
 912     { (void)operator<<((const wchar_t *)s); }
 913 #else // !wxUSE_UNICODE
 914   wxString& operator<<(const wxCharBuffer& s)
 915     { (void)operator<<((const char *)s); return *this; }
 916   void operator+=(const wxCharBuffer& s)
 917     { (void)operator<<((const char *)s); }
 918 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 919
 920     // string += C string
 921   wxString& Append(const wxString& s)
 922     {
 923         // test for IsEmpty() to share the string if possible
 924         if ( IsEmpty() )
 925             *this = s;
 926         else
 927             append(s);
 928         return *this;
 929     }
 930   wxString& Append(const wxChar* psz)
 931     { append(psz); return *this; }
 932     // append count copies of given character
 933   wxString& Append(wxChar ch, size_t count = 1u)
 934     { append(count, ch); return *this; }
 935   wxString& Append(const wxChar* psz, size_t nLen)
 936     { append(psz, nLen); return *this; }
 937
 938     // prepend a string, return the string itself
 939   wxString& Prepend(const wxString& str)
 940     { *this = str + *this; return *this; }
 941
 942     // non-destructive concatenation
 943       //
 944   friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string1,  const wxString& string2);
 945       //
 946   friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string, wxChar ch);
 947       //
 948   friend wxString WXDLLIMPEXP_BASE operator+(wxChar ch, const wxString& string);
 949       //
 950   friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string, const wxChar *psz);
 951       //
 952   friend wxString WXDLLIMPEXP_BASE operator+(const wxChar *psz, const wxString& string);
 953
 954   // stream-like functions
 955       // insert an int into string
 956   wxString& operator<<(int i)
 957     { return (*this) << Format(_T("%d"), i); }
 958       // insert an unsigned int into string
 959   wxString& operator<<(unsigned int ui)
 960     { return (*this) << Format(_T("%u"), ui); }
 961       // insert a long into string
 962   wxString& operator<<(long l)
 963     { return (*this) << Format(_T("%ld"), l); }
 964       // insert an unsigned long into string
 965   wxString& operator<<(unsigned long ul)
 966     { return (*this) << Format(_T("%lu"), ul); }
 967       // insert a float into string
 968   wxString& operator<<(float f)
 969     { return (*this) << Format(_T("%f"), f); }
 970       // insert a double into string
 971   wxString& operator<<(double d)
 972     { return (*this) << Format(_T("%g"), d); }
 973
 974   // string comparison
 975     // case-sensitive comparison (returns a value < 0, = 0 or > 0)
 976   int Cmp(const wxChar *psz) const { return wxStrcmp(c_str(), psz); }
 977     // same as Cmp() but not case-sensitive
 978   int CmpNoCase(const wxChar *psz) const { return wxStricmp(c_str(), psz); }
 979     // test for the string equality, either considering case or not
 980     // (if compareWithCase then the case matters)
 981   bool IsSameAs(const wxChar *psz, bool compareWithCase = true) const
 982     { return (compareWithCase ? Cmp(psz) : CmpNoCase(psz)) == 0; }
 983     // comparison with a signle character: returns true if equal
 984   bool IsSameAs(wxChar c, bool compareWithCase = true) const
 985     {
 986       return (length() == 1) && (compareWithCase ? GetChar(0u) == c
 987                               : wxToupper(GetChar(0u)) == wxToupper(c));
 988     }
 989
 990   // simple sub-string extraction
 991       // return substring starting at nFirst of length nCount (or till the end
 992       // if nCount = default value)
 993   wxString Mid(size_t nFirst, size_t nCount = npos) const;
 994
 995       // operator version of Mid()
 996   wxString  operator()(size_t start, size_t len) const
 997     { return Mid(start, len); }
 998
 999       // check that the string starts with prefix and return the rest of the
1000       // string in the provided pointer if it is not NULL, otherwise return
1001       // false
1002   bool StartsWith(const wxChar *prefix, wxString *rest = NULL) const;
1003
1004       // get first nCount characters
1005   wxString Left(size_t nCount) const;
1006       // get last nCount characters
1007   wxString Right(size_t nCount) const;
1008       // get all characters before the first occurance of ch
1009       // (returns the whole string if ch not found)
1010   wxString BeforeFirst(wxChar ch) const;
1011       // get all characters before the last occurence of ch
1012       // (returns empty string if ch not found)
1013   wxString BeforeLast(wxChar ch) const;
1014       // get all characters after the first occurence of ch
1015       // (returns empty string if ch not found)
1016   wxString AfterFirst(wxChar ch) const;
1017       // get all characters after the last occurence of ch
1018       // (returns the whole string if ch not found)
1019   wxString AfterLast(wxChar ch) const;
1020
1021     // for compatibility only, use more explicitly named functions above
1022   wxString Before(wxChar ch) const { return BeforeLast(ch); }
1023   wxString After(wxChar ch) const { return AfterFirst(ch); }
1024
1025   // case conversion
1026       // convert to upper case in place, return the string itself
1027   wxString& MakeUpper();
1028       // convert to upper case, return the copy of the string
1029       // Here's something to remember: BC++ doesn't like returns in inlines.
1030   wxString Upper() const ;
1031       // convert to lower case in place, return the string itself
1032   wxString& MakeLower();
1033       // convert to lower case, return the copy of the string
1034   wxString Lower() const ;
1035
1036   // trimming/padding whitespace (either side) and truncating
1037       // remove spaces from left or from right (default) side
1038   wxString& Trim(bool bFromRight = true);
1039       // add nCount copies chPad in the beginning or at the end (default)
1040   wxString& Pad(size_t nCount, wxChar chPad = wxT(' '), bool bFromRight = true);
1041
1042   // searching and replacing
1043       // searching (return starting index, or -1 if not found)
1044   int Find(wxChar ch, bool bFromEnd = false) const;   // like strchr/strrchr
1045       // searching (return starting index, or -1 if not found)
1046   int Find(const wxChar *pszSub) const;               // like strstr
1047       // replace first (or all of bReplaceAll) occurences of substring with
1048       // another string, returns the number of replacements made
1049   size_t Replace(const wxChar *szOld,
1050                  const wxChar *szNew,
1051                  bool bReplaceAll = true);
1052
1053     // check if the string contents matches a mask containing '*' and '?'
1054   bool Matches(const wxChar *szMask) const;
1055
1056     // conversion to numbers: all functions return true only if the whole
1057     // string is a number and put the value of this number into the pointer
1058     // provided, the base is the numeric base in which the conversion should be
1059     // done and must be comprised between 2 and 36 or be 0 in which case the
1060     // standard C rules apply (leading '0' => octal, "0x" => hex)
1061         // convert to a signed integer
1062     bool ToLong(long *val, int base = 10) const;
1063         // convert to an unsigned integer
1064     bool ToULong(unsigned long *val, int base = 10) const;
1065         // convert to a double
1066     bool ToDouble(double *val) const;
1067
1068   // formated input/output
1069     // as sprintf(), returns the number of characters written or < 0 on error
1070     // (take 'this' into account in attribute parameter count)
1071   int Printf(const wxChar *pszFormat, ...) ATTRIBUTE_PRINTF_2;
1072     // as vprintf(), returns the number of characters written or < 0 on error
1073   int PrintfV(const wxChar* pszFormat, va_list argptr);
1074
1075     // returns the string containing the result of Printf() to it
1076   static wxString Format(const wxChar *pszFormat, ...) ATTRIBUTE_PRINTF_1;
1077     // the same as above, but takes a va_list
1078   static wxString FormatV(const wxChar *pszFormat, va_list argptr);
1079
1080   // raw access to string memory
1081     // ensure that string has space for at least nLen characters
1082     // only works if the data of this string is not shared
1083   bool Alloc(size_t nLen) { reserve(nLen); /*return capacity() >= nLen;*/ return true; }
1084     // minimize the string's memory
1085     // only works if the data of this string is not shared
1086   bool Shrink();
1087 #if !wxUSE_STL
1088     // get writable buffer of at least nLen bytes. Unget() *must* be called
1089     // a.s.a.p. to put string back in a reasonable state!
1090   wxChar *GetWriteBuf(size_t nLen);
1091     // call this immediately after GetWriteBuf() has been used
1092   void UngetWriteBuf();
1093   void UngetWriteBuf(size_t nLen);
1094 #endif
1095
1096   // wxWidgets version 1 compatibility functions
1097
1098   // use Mid()
1099   wxString SubString(size_t from, size_t to) const
1100       { return Mid(from, (to - from + 1)); }
1101     // values for second parameter of CompareTo function
1102   enum caseCompare {exact, ignoreCase};
1103     // values for first parameter of Strip function
1104   enum stripType {leading = 0x1, trailing = 0x2, both = 0x3};
1105
1106   // use Printf()
1107   // (take 'this' into account in attribute parameter count)
1108   int sprintf(const wxChar *pszFormat, ...) ATTRIBUTE_PRINTF_2;
1109
1110     // use Cmp()
1111   inline int CompareTo(const wxChar* psz, caseCompare cmp = exact) const
1112     { return cmp == exact ? Cmp(psz) : CmpNoCase(psz); }
1113
1114     // use Len
1115   size_t Length() const { return length(); }
1116     // Count the number of characters
1117   int Freq(wxChar ch) const;
1118     // use MakeLower
1119   void LowerCase() { MakeLower(); }
1120     // use MakeUpper
1121   void UpperCase() { MakeUpper(); }
1122     // use Trim except that it doesn't change this string
1123   wxString Strip(stripType w = trailing) const;
1124
1125     // use Find (more general variants not yet supported)
1126   size_t Index(const wxChar* psz) const { return Find(psz); }
1127   size_t Index(wxChar ch)         const { return Find(ch);  }
1128     // use Truncate
1129   wxString& Remove(size_t pos) { return Truncate(pos); }
1130   wxString& RemoveLast(size_t n = 1) { return Truncate(length() - n); }
1131
1132   wxString& Remove(size_t nStart, size_t nLen)
1133       { return (wxString&)erase( nStart, nLen ); }
1134
1135     // use Find()
1136   int First( const wxChar ch ) const { return Find(ch); }
1137   int First( const wxChar* psz ) const { return Find(psz); }
1138   int First( const wxString &str ) const { return Find(str); }
1139   int Last( const wxChar ch ) const { return Find(ch, true); }
1140   bool Contains(const wxString& str) const { return Find(str) != wxNOT_FOUND; }
1141
1142     // use IsEmpty()
1143   bool IsNull() const { return IsEmpty(); }
1144
1145   // std::string compatibility functions
1146
1147     // take nLen chars starting at nPos
1148   wxString(const wxString& str, size_t nPos, size_t nLen)
1149       : wxStringBase(str, nPos, nLen) { }
1150     // take all characters from pStart to pEnd
1151   wxString(const void *pStart, const void *pEnd)
1152       : wxStringBase((const wxChar*)pStart, (const wxChar*)pEnd) { }
1153 #if wxUSE_STL
1154   wxString(const_iterator first, const_iterator last)
1155       : wxStringBase(first, last) { }
1156 #endif
1157
1158   // lib.string.modifiers
1159     // append elements str[pos], ..., str[pos+n]
1160   wxString& append(const wxString& str, size_t pos, size_t n)
1161     { return (wxString&)wxStringBase::append(str, pos, n); }
1162     // append a string
1163   wxString& append(const wxString& str)
1164     { return (wxString&)wxStringBase::append(str); }
1165     // append first n (or all if n == npos) characters of sz
1166   wxString& append(const wxChar *sz)
1167     { return (wxString&)wxStringBase::append(sz); }
1168   wxString& append(const wxChar *sz, size_t n)
1169     { return (wxString&)wxStringBase::append(sz, n); }
1170     // append n copies of ch
1171   wxString& append(size_t n, wxChar ch)
1172     { return (wxString&)wxStringBase::append(n, ch); }
1173     // append from first to last
1174   wxString& append(const_iterator first, const_iterator last)
1175     { return (wxString&)wxStringBase::append(first, last); }
1176
1177     // same as `this_string = str'
1178   wxString& assign(const wxString& str)
1179     { return (wxString&)wxStringBase::assign(str); }
1180     // same as ` = str[pos..pos + n]
1181   wxString& assign(const wxString& str, size_t pos, size_t n)
1182     { return (wxString&)wxStringBase::assign(str, pos, n); }
1183     // same as `= first n (or all if n == npos) characters of sz'
1184   wxString& assign(const wxChar *sz)
1185     { return (wxString&)wxStringBase::assign(sz); }
1186   wxString& assign(const wxChar *sz, size_t n)
1187     { return (wxString&)wxStringBase::assign(sz, n); }
1188     // same as `= n copies of ch'
1189   wxString& assign(size_t n, wxChar ch)
1190     { return (wxString&)wxStringBase::assign(n, ch); }
1191     // assign from first to last
1192   wxString& assign(const_iterator first, const_iterator last)
1193     { return (wxString&)wxStringBase::assign(first, last); }
1194
1195     // string comparison
1196 #ifndef HAVE_STD_STRING_COMPARE
1197   int compare(const wxStringBase& str) const;
1198     // comparison with a substring
1199   int compare(size_t nStart, size_t nLen, const wxStringBase& str) const;
1200     // comparison of 2 substrings
1201   int compare(size_t nStart, size_t nLen,
1202               const wxStringBase& str, size_t nStart2, size_t nLen2) const;
1203     // just like strcmp()
1204   int compare(const wxChar* sz) const;
1205     // substring comparison with first nCount characters of sz
1206   int compare(size_t nStart, size_t nLen,
1207               const wxChar* sz, size_t nCount = npos) const;
1208 #endif // !defined HAVE_STD_STRING_COMPARE
1209
1210     // insert another string
1211   wxString& insert(size_t nPos, const wxString& str)
1212     { return (wxString&)wxStringBase::insert(nPos, str); }
1213     // insert n chars of str starting at nStart (in str)
1214   wxString& insert(size_t nPos, const wxString& str, size_t nStart, size_t n)
1215     { return (wxString&)wxStringBase::insert(nPos, str, nStart, n); }
1216     // insert first n (or all if n == npos) characters of sz
1217   wxString& insert(size_t nPos, const wxChar *sz)
1218     { return (wxString&)wxStringBase::insert(nPos, sz); }
1219   wxString& insert(size_t nPos, const wxChar *sz, size_t n)
1220     { return (wxString&)wxStringBase::insert(nPos, sz, n); }
1221     // insert n copies of ch
1222   wxString& insert(size_t nPos, size_t n, wxChar ch)
1223     { return (wxString&)wxStringBase::insert(nPos, n, ch); }
1224   iterator insert(iterator it, wxChar ch)
1225     { return wxStringBase::insert(it, ch); }
1226   void insert(iterator it, const_iterator first, const_iterator last)
1227     { wxStringBase::insert(it, first, last); }
1228   void insert(iterator it, size_type n, wxChar ch)
1229     { wxStringBase::insert(it, n, ch); }
1230
1231     // delete characters from nStart to nStart + nLen
1232   wxString& erase(size_type pos = 0, size_type n = npos)
1233     { return (wxString&)wxStringBase::erase(pos, n); }
1234   iterator erase(iterator first, iterator last)
1235     { return wxStringBase::erase(first, last); }
1236   iterator erase(iterator first)
1237     { return wxStringBase::erase(first); }
1238
1239 #ifdef wxSTRING_BASE_HASNT_CLEAR
1240   void clear() { erase(); }
1241 #endif
1242
1243     // replaces the substring of length nLen starting at nStart
1244   wxString& replace(size_t nStart, size_t nLen, const wxChar* sz)
1245     { return (wxString&)wxStringBase::replace(nStart, nLen, sz); }
1246     // replaces the substring of length nLen starting at nStart
1247   wxString& replace(size_t nStart, size_t nLen, const wxString& str)
1248     { return (wxString&)wxStringBase::replace(nStart, nLen, str); }
1249     // replaces the substring with nCount copies of ch
1250   wxString& replace(size_t nStart, size_t nLen, size_t nCount, wxChar ch)
1251     { return (wxString&)wxStringBase::replace(nStart, nLen, nCount, ch); }
1252     // replaces a substring with another substring
1253   wxString& replace(size_t nStart, size_t nLen,
1254                     const wxString& str, size_t nStart2, size_t nLen2)
1255     { return (wxString&)wxStringBase::replace(nStart, nLen, str,
1256                                               nStart2, nLen2); }
1257      // replaces the substring with first nCount chars of sz
1258   wxString& replace(size_t nStart, size_t nLen,
1259                     const wxChar* sz, size_t nCount)
1260     { return (wxString&)wxStringBase::replace(nStart, nLen, sz, nCount); }
1261   wxString& replace(iterator first, iterator last, const_pointer s)
1262     { return (wxString&)wxStringBase::replace(first, last, s); }
1263   wxString& replace(iterator first, iterator last, const_pointer s,
1264                     size_type n)
1265     { return (wxString&)wxStringBase::replace(first, last, s, n); }
1266   wxString& replace(iterator first, iterator last, const wxString& s)
1267     { return (wxString&)wxStringBase::replace(first, last, s); }
1268   wxString& replace(iterator first, iterator last, size_type n, wxChar c)
1269     { return (wxString&)wxStringBase::replace(first, last, n, c); }
1270   wxString& replace(iterator first, iterator last,
1271                     const_iterator first1, const_iterator last1)
1272     { return (wxString&)wxStringBase::replace(first, last, first1, last1); }
1273
1274       // string += string
1275   wxString& operator+=(const wxString& s)
1276     { return (wxString&)wxStringBase::operator+=(s); }
1277       // string += C string
1278   wxString& operator+=(const wxChar *psz)
1279     { return (wxString&)wxStringBase::operator+=(psz); }
1280       // string += char
1281   wxString& operator+=(wxChar ch)
1282     { return (wxString&)wxStringBase::operator+=(ch); }
1283 };
1284
1285 // define wxArrayString, for compatibility
1286 #if WXWIN_COMPATIBILITY_2_4 && !wxUSE_STL
1287     #include "wx/arrstr.h"
1288 #endif
1289
1290 // ----------------------------------------------------------------------------
1291 // wxStringBuffer: a tiny class allowing to get a writable pointer into string
1292 // ----------------------------------------------------------------------------
1293
1294 #if wxUSE_STL
1295
1296 class WXDLLIMPEXP_BASE wxStringBuffer
1297 {
1298 public:
1299     wxStringBuffer(wxString& str, size_t lenWanted = 1024)
1300         : m_str(str), m_buf(lenWanted)
1301         { }
1302
1303     ~wxStringBuffer() { m_str.assign(m_buf.data(), wxStrlen(m_buf.data())); }
1304
1305     operator wxChar*() { return m_buf.data(); }
1306
1307 private:
1308     wxString& m_str;
1309 #if wxUSE_UNICODE
1310     wxWCharBuffer m_buf;
1311 #else
1312     wxCharBuffer m_buf;
1313 #endif
1314
1315     DECLARE_NO_COPY_CLASS(wxStringBuffer)
1316 };
1317
1318 class WXDLLIMPEXP_BASE wxStringBufferLength
1319 {
1320 public:
1321     wxStringBufferLength(wxString& str, size_t lenWanted = 1024)
1322         : m_str(str), m_buf(lenWanted), m_len(0), m_lenSet(false)
1323         { }
1324
1325     ~wxStringBufferLength()
1326     {
1327         wxASSERT(m_lenSet);
1328         m_str.assign(m_buf.data(), m_len);
1329     }
1330
1331     operator wxChar*() { return m_buf.data(); }
1332     void SetLength(size_t length) { m_len = length; m_lenSet = true; }
1333
1334 private:
1335     wxString& m_str;
1336 #if wxUSE_UNICODE
1337     wxWCharBuffer m_buf;
1338 #else
1339     wxCharBuffer  m_buf;
1340 #endif
1341     size_t        m_len;
1342     bool          m_lenSet;
1343
1344     DECLARE_NO_COPY_CLASS(wxStringBufferLength)
1345 };
1346
1347 #else // if !wxUSE_STL
1348
1349 class WXDLLIMPEXP_BASE wxStringBuffer
1350 {
1351 public:
1352     wxStringBuffer(wxString& str, size_t lenWanted = 1024)
1353         : m_str(str), m_buf(NULL)
1354         { m_buf = m_str.GetWriteBuf(lenWanted); }
1355
1356     ~wxStringBuffer() { m_str.UngetWriteBuf(); }
1357
1358     operator wxChar*() const { return m_buf; }
1359
1360 private:
1361     wxString& m_str;
1362     wxChar   *m_buf;
1363
1364     DECLARE_NO_COPY_CLASS(wxStringBuffer)
1365 };
1366
1367 class WXDLLIMPEXP_BASE wxStringBufferLength
1368 {
1369 public:
1370     wxStringBufferLength(wxString& str, size_t lenWanted = 1024)
1371         : m_str(str), m_buf(NULL), m_len(0), m_lenSet(false)
1372         { m_buf = m_str.GetWriteBuf(lenWanted); }
1373
1374     ~wxStringBufferLength()
1375     {
1376         wxASSERT(m_lenSet);
1377         m_str.UngetWriteBuf(m_len);
1378     }
1379
1380     operator wxChar*() const { return m_buf; }
1381     void SetLength(size_t length) { m_len = length; m_lenSet = true; }
1382
1383 private:
1384     wxString& m_str;
1385     wxChar   *m_buf;
1386     size_t    m_len;
1387     bool      m_lenSet;
1388
1389     DECLARE_NO_COPY_CLASS(wxStringBufferLength)
1390 };
1391
1392 #endif // !wxUSE_STL
1393
1394 // ---------------------------------------------------------------------------
1395 // wxString comparison functions: operator versions are always case sensitive
1396 // ---------------------------------------------------------------------------
1397
1398 #if wxUSE_STL
1399
1400 inline bool operator==(const wxString& s1, const wxString& s2)
1401     { return s1.compare(s2) == 0; }
1402 inline bool operator==(const wxString& s1, const wxChar  * s2)
1403     { return s1.compare(s2) == 0; }
1404 inline bool operator==(const wxChar  * s1, const wxString& s2)
1405     { return s2.compare(s1) == 0; }
1406 inline bool operator!=(const wxString& s1, const wxString& s2)
1407     { return s1.compare(s2) != 0; }
1408 inline bool operator!=(const wxString& s1, const wxChar  * s2)
1409     { return s1.compare(s2) != 0; }
1410 inline bool operator!=(const wxChar  * s1, const wxString& s2)
1411     { return s2.compare(s1) != 0; }
1412 inline bool operator< (const wxString& s1, const wxString& s2)
1413     { return s1.compare(s2) <  0; }
1414 inline bool operator< (const wxString& s1, const wxChar  * s2)
1415     { return s1.compare(s2) <  0; }
1416 inline bool operator< (const wxChar  * s1, const wxString& s2)
1417     { return s2.compare(s1) >  0; }
1418 inline bool operator> (const wxString& s1, const wxString& s2)
1419     { return s1.compare(s2) >  0; }
1420 inline bool operator> (const wxString& s1, const wxChar  * s2)
1421     { return s1.compare(s2) >  0; }
1422 inline bool operator> (const wxChar  * s1, const wxString& s2)
1423     { return s2.compare(s1) <  0; }
1424 inline bool operator<=(const wxString& s1, const wxString& s2)
1425     { return s1.compare(s2) <= 0; }
1426 inline bool operator<=(const wxString& s1, const wxChar  * s2)
1427     { return s1.compare(s2) <= 0; }
1428 inline bool operator<=(const wxChar  * s1, const wxString& s2)
1429     { return s2.compare(s1) >= 0; }
1430 inline bool operator>=(const wxString& s1, const wxString& s2)
1431     { return s1.compare(s2) >= 0; }
1432 inline bool operator>=(const wxString& s1, const wxChar  * s2)
1433     { return s1.compare(s2) >= 0; }
1434 inline bool operator>=(const wxChar  * s1, const wxString& s2)
1435     { return s2.compare(s1) <= 0; }
1436
1437 #else // if !wxUSE_STL
1438
1439 inline bool operator==(const wxString& s1, const wxString& s2)
1440     { return (s1.Len() == s2.Len()) && (s1.Cmp(s2) == 0); }
1441 inline bool operator==(const wxString& s1, const wxChar  * s2)
1442     { return s1.Cmp(s2) == 0; }
1443 inline bool operator==(const wxChar  * s1, const wxString& s2)
1444     { return s2.Cmp(s1) == 0; }
1445 inline bool operator!=(const wxString& s1, const wxString& s2)
1446     { return (s1.Len() != s2.Len()) || (s1.Cmp(s2) != 0); }
1447 inline bool operator!=(const wxString& s1, const wxChar  * s2)
1448     { return s1.Cmp(s2) != 0; }
1449 inline bool operator!=(const wxChar  * s1, const wxString& s2)
1450     { return s2.Cmp(s1) != 0; }
1451 inline bool operator< (const wxString& s1, const wxString& s2)
1452     { return s1.Cmp(s2) < 0; }
1453 inline bool operator< (const wxString& s1, const wxChar  * s2)
1454     { return s1.Cmp(s2) <  0; }
1455 inline bool operator< (const wxChar  * s1, const wxString& s2)
1456     { return s2.Cmp(s1) >  0; }
1457 inline bool operator> (const wxString& s1, const wxString& s2)
1458     { return s1.Cmp(s2) >  0; }
1459 inline bool operator> (const wxString& s1, const wxChar  * s2)
1460     { return s1.Cmp(s2) >  0; }
1461 inline bool operator> (const wxChar  * s1, const wxString& s2)
1462     { return s2.Cmp(s1) <  0; }
1463 inline bool operator<=(const wxString& s1, const wxString& s2)
1464     { return s1.Cmp(s2) <= 0; }
1465 inline bool operator<=(const wxString& s1, const wxChar  * s2)
1466     { return s1.Cmp(s2) <= 0; }
1467 inline bool operator<=(const wxChar  * s1, const wxString& s2)
1468     { return s2.Cmp(s1) >= 0; }
1469 inline bool operator>=(const wxString& s1, const wxString& s2)
1470     { return s1.Cmp(s2) >= 0; }
1471 inline bool operator>=(const wxString& s1, const wxChar  * s2)
1472     { return s1.Cmp(s2) >= 0; }
1473 inline bool operator>=(const wxChar  * s1, const wxString& s2)
1474     { return s2.Cmp(s1) <= 0; }
1475
1476 #endif // !wxUSE_STL
1477
1478 // comparison with char
1479 inline bool operator==(wxChar c, const wxString& s) { return s.IsSameAs(c); }
1480 inline bool operator==(const wxString& s, wxChar c) { return s.IsSameAs(c); }
1481 inline bool operator!=(wxChar c, const wxString& s) { return !s.IsSameAs(c); }
1482 inline bool operator!=(const wxString& s, wxChar c) { return !s.IsSameAs(c); }
1483
1484 #if wxUSE_UNICODE
1485 inline bool operator==(const wxString& s1, const wxWCharBuffer& s2)
1486     { return (s1.Cmp((const wchar_t *)s2) == 0); }
1487 inline bool operator==(const wxWCharBuffer& s1, const wxString& s2)
1488     { return (s2.Cmp((const wchar_t *)s1) == 0); }
1489 inline bool operator!=(const wxString& s1, const wxWCharBuffer& s2)
1490     { return (s1.Cmp((const wchar_t *)s2) != 0); }
1491 inline bool operator!=(const wxWCharBuffer& s1, const wxString& s2)
1492     { return (s2.Cmp((const wchar_t *)s1) != 0); }
1493 #else // !wxUSE_UNICODE
1494 inline bool operator==(const wxString& s1, const wxCharBuffer& s2)
1495     { return (s1.Cmp((const char *)s2) == 0); }
1496 inline bool operator==(const wxCharBuffer& s1, const wxString& s2)
1497     { return (s2.Cmp((const char *)s1) == 0); }
1498 inline bool operator!=(const wxString& s1, const wxCharBuffer& s2)
1499     { return (s1.Cmp((const char *)s2) != 0); }
1500 inline bool operator!=(const wxCharBuffer& s1, const wxString& s2)
1501     { return (s2.Cmp((const char *)s1) != 0); }
1502 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
1503
1504 #if !wxUSE_STL
1505
1506 wxString WXDLLIMPEXP_BASE operator+(const wxString& string1,  const wxString& string2);
1507 wxString WXDLLIMPEXP_BASE operator+(const wxString& string, wxChar ch);
1508 wxString WXDLLIMPEXP_BASE operator+(wxChar ch, const wxString& string);
1509 wxString WXDLLIMPEXP_BASE operator+(const wxString& string, const wxChar *psz);
1510 wxString WXDLLIMPEXP_BASE operator+(const wxChar *psz, const wxString& string);
1511
1512 #endif // !wxUSE_STL
1513
1514 #if wxUSE_UNICODE
1515 inline wxString operator+(const wxString& string, const wxWCharBuffer& buf)
1516     { return string + (const wchar_t *)buf; }
1517 inline wxString operator+(const wxWCharBuffer& buf, const wxString& string)
1518     { return (const wchar_t *)buf + string; }
1519 #else // !wxUSE_UNICODE
1520 inline wxString operator+(const wxString& string, const wxCharBuffer& buf)
1521     { return string + (const char *)buf; }
1522 inline wxString operator+(const wxCharBuffer& buf, const wxString& string)
1523     { return (const char *)buf + string; }
1524 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
1525
1526 // ---------------------------------------------------------------------------
1527 // Implementation only from here until the end of file
1528 // ---------------------------------------------------------------------------
1529
1530 // don't pollute the library user's name space
1531 #undef wxASSERT_VALID_INDEX
1532
1533 #if wxUSE_STD_IOSTREAM
1534
1535 #include "wx/iosfwrap.h"
1536
1537 WXDLLIMPEXP_BASE wxSTD istream& operator>>(wxSTD istream&, wxString&);
1538 WXDLLIMPEXP_BASE wxSTD ostream& operator<<(wxSTD ostream&, const wxString&);
1539
1540 #endif  // wxSTD_STRING_COMPATIBILITY
1541
1542 #endif  // _WX_WXSTRINGH__