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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(size_t n = 1) { return Truncate(Len() - n); }
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 void RemoveAt(size_t nIndex) { Remove(nIndex); }
1016
1017 // sorting
1018 // sort array elements in alphabetical order (or reversed alphabetical
1019 // order if reverseOrder parameter is TRUE)
1020 void Sort(bool reverseOrder = FALSE);
1021 // sort array elements using specified comparaison function
1022 void Sort(CompareFunction compareFunction);
1023
1024 // comparison
1025 // compare two arrays case sensitively
1026 bool operator==(const wxArrayString& a) const;
1027 // compare two arrays case sensitively
1028 bool operator!=(const wxArrayString& a) const { return !(*this == a); }
1029
1030 protected:
1031 void Copy(const wxArrayString& src); // copies the contents of another array
1032
1033 private:
1034 void Grow(); // makes array bigger if needed
1035 void Free(); // free all the strings stored
1036
1037 void DoSort(); // common part of all Sort() variants
1038
1039 size_t m_nSize, // current size of the array
1040 m_nCount; // current number of elements
1041
1042 wxChar **m_pItems; // pointer to data
1043
1044 bool m_autoSort; // if TRUE, keep the array always sorted
1045 };
1046
1047 class WXDLLEXPORT wxSortedArrayString : public wxArrayString
1048 {
1049 public:
1050 wxSortedArrayString() : wxArrayString(TRUE)
1051 { }
1052 wxSortedArrayString(const wxArrayString& array) : wxArrayString(TRUE)
1053 { Copy(array); }
1054 };
1055
1056 // ---------------------------------------------------------------------------
1057 // wxString comparison functions: operator versions are always case sensitive
1058 // ---------------------------------------------------------------------------
1059
1060 inline bool operator==(const wxString& s1, const wxString& s2)
1061 { return (s1.Len() == s2.Len()) && (s1.Cmp(s2) == 0); }
1062 inline bool operator==(const wxString& s1, const wxChar * s2)
1063 { return s1.Cmp(s2) == 0; }
1064 inline bool operator==(const wxChar * s1, const wxString& s2)
1065 { return s2.Cmp(s1) == 0; }
1066 inline bool operator!=(const wxString& s1, const wxString& s2)
1067 { return (s1.Len() != s2.Len()) || (s1.Cmp(s2) != 0); }
1068 inline bool operator!=(const wxString& s1, const wxChar * s2)
1069 { return s1.Cmp(s2) != 0; }
1070 inline bool operator!=(const wxChar * s1, const wxString& s2)
1071 { return s2.Cmp(s1) != 0; }
1072 inline bool operator< (const wxString& s1, const wxString& s2)
1073 { return s1.Cmp(s2) < 0; }
1074 inline bool operator< (const wxString& s1, const wxChar * s2)
1075 { return s1.Cmp(s2) < 0; }
1076 inline bool operator< (const wxChar * s1, const wxString& s2)
1077 { return s2.Cmp(s1) > 0; }
1078 inline bool operator> (const wxString& s1, const wxString& s2)
1079 { return s1.Cmp(s2) > 0; }
1080 inline bool operator> (const wxString& s1, const wxChar * s2)
1081 { return s1.Cmp(s2) > 0; }
1082 inline bool operator> (const wxChar * s1, const wxString& s2)
1083 { return s2.Cmp(s1) < 0; }
1084 inline bool operator<=(const wxString& s1, const wxString& s2)
1085 { return s1.Cmp(s2) <= 0; }
1086 inline bool operator<=(const wxString& s1, const wxChar * s2)
1087 { return s1.Cmp(s2) <= 0; }
1088 inline bool operator<=(const wxChar * s1, const wxString& s2)
1089 { return s2.Cmp(s1) >= 0; }
1090 inline bool operator>=(const wxString& s1, const wxString& s2)
1091 { return s1.Cmp(s2) >= 0; }
1092 inline bool operator>=(const wxString& s1, const wxChar * s2)
1093 { return s1.Cmp(s2) >= 0; }
1094 inline bool operator>=(const wxChar * s1, const wxString& s2)
1095 { return s2.Cmp(s1) <= 0; }
1096
1097 // comparison with char
1098 inline bool operator==(wxChar c, const wxString& s) { return s.IsSameAs(c); }
1099 inline bool operator==(const wxString& s, wxChar c) { return s.IsSameAs(c); }
1100 inline bool operator!=(wxChar c, const wxString& s) { return !s.IsSameAs(c); }
1101 inline bool operator!=(const wxString& s, wxChar c) { return !s.IsSameAs(c); }
1102
1103 #if wxUSE_UNICODE
1104 inline bool operator==(const wxString& s1, const wxWCharBuffer& s2)
1105 { return (s1.Cmp((const wchar_t *)s2) == 0); }
1106 inline bool operator==(const wxWCharBuffer& s1, const wxString& s2)
1107 { return (s2.Cmp((const wchar_t *)s1) == 0); }
1108 inline bool operator!=(const wxString& s1, const wxWCharBuffer& s2)
1109 { return (s1.Cmp((const wchar_t *)s2) != 0); }
1110 inline bool operator!=(const wxWCharBuffer& s1, const wxString& s2)
1111 { return (s2.Cmp((const wchar_t *)s1) != 0); }
1112 #else // !wxUSE_UNICODE
1113 inline bool operator==(const wxString& s1, const wxCharBuffer& s2)
1114 { return (s1.Cmp((const char *)s2) == 0); }
1115 inline bool operator==(const wxCharBuffer& s1, const wxString& s2)
1116 { return (s2.Cmp((const char *)s1) == 0); }
1117 inline bool operator!=(const wxString& s1, const wxCharBuffer& s2)
1118 { return (s1.Cmp((const char *)s2) != 0); }
1119 inline bool operator!=(const wxCharBuffer& s1, const wxString& s2)
1120 { return (s2.Cmp((const char *)s1) != 0); }
1121 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
1122
1123 wxString WXDLLEXPORT operator+(const wxString& string1, const wxString& string2);
1124 wxString WXDLLEXPORT operator+(const wxString& string, wxChar ch);
1125 wxString WXDLLEXPORT operator+(wxChar ch, const wxString& string);
1126 wxString WXDLLEXPORT operator+(const wxString& string, const wxChar *psz);
1127 wxString WXDLLEXPORT operator+(const wxChar *psz, const wxString& string);
1128 #if wxUSE_UNICODE
1129 inline wxString WXDLLEXPORT operator+(const wxString& string, const wxWCharBuffer& buf)
1130 { return string + (const wchar_t *)buf; }
1131 inline wxString WXDLLEXPORT operator+(const wxWCharBuffer& buf, const wxString& string)
1132 { return (const wchar_t *)buf + string; }
1133 #else // !wxUSE_UNICODE
1134 inline wxString WXDLLEXPORT operator+(const wxString& string, const wxCharBuffer& buf)
1135 { return string + (const char *)buf; }
1136 inline wxString WXDLLEXPORT operator+(const wxCharBuffer& buf, const wxString& string)
1137 { return (const char *)buf + string; }
1138 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
1139
1140 // ---------------------------------------------------------------------------
1141 // Implementation only from here until the end of file
1142 // ---------------------------------------------------------------------------
1143
1144 // don't pollute the library user's name space
1145 #undef ASSERT_VALID_INDEX
1146
1147 #if defined(wxSTD_STRING_COMPATIBILITY) && wxUSE_STD_IOSTREAM
1148
1149 #include "wx/ioswrap.h"
1150
1151 WXDLLEXPORT istream& operator>>(istream&, wxString&);
1152 WXDLLEXPORT ostream& operator<<(ostream&, const wxString&);
1153
1154 #endif // wxSTD_STRING_COMPATIBILITY
1155
1156 #endif // _WX_WXSTRINGH__
wxWidgets (Impactor)