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[wxWidgets.git] / include / wx / string.h
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: string.h
3 // Purpose: wxString and wxArrayString classes
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 29/01/98
7 // RCS-ID: $Id$
8 // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
9 // Licence: wxWindows license
10 ///////////////////////////////////////////////////////////////////////////////
11
12 #ifndef _WX_WXSTRINGH__
13 #define _WX_WXSTRINGH__
14
15 #ifdef __GNUG__
16 #pragma interface "string.h"
17 #endif
18
19 #ifdef __WXMAC__
20 #include <ctype.h>
21 #endif
22
23 #include <string.h>
24 #include <stdio.h>
25 #include <stdarg.h>
26 #include <limits.h>
27 #include <stdlib.h>
28
29 #ifdef HAVE_STRINGS_H
30 #include <strings.h> // for strcasecmp()
31 #endif // AIX
32
33 #ifndef WX_PRECOMP
34 #include "wx/defs.h"
35
36 #ifdef WXSTRING_IS_WXOBJECT
37 #include "wx/object.h"
38 #endif
39 #endif // !PCH
40
41 #include "wx/debug.h"
42 #include "wx/wxchar.h"
43 #include "wx/buffer.h"
44
45 /*
46 Efficient string class [more or less] compatible with MFC CString,
47 wxWindows version 1 wxString and std::string and some handy functions
48 missing from string.h.
49 */
50
51 // ---------------------------------------------------------------------------
52 // macros
53 // ---------------------------------------------------------------------------
54
55 // compile the std::string compatibility functions if defined
56 #define wxSTD_STRING_COMPATIBILITY
57
58 // define to derive wxString from wxObject
59 #ifdef WXSTRING_IS_WXOBJECT
60 #undef WXSTRING_IS_WXOBJECT
61 #endif
62
63 // maximum possible length for a string means "take all string" everywhere
64 // (as sizeof(StringData) is unknown here we substract 100)
65 const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100;
66
67 // 'naughty' cast
68 #define WXSTRINGCAST (wxChar *)(const wxChar *)
69 #define MBSTRINGCAST (char *)(const char *)
70 #define WCSTRINGCAST (wchar_t *)(const wchar_t *)
71
72 // implementation only
73 #define ASSERT_VALID_INDEX(i) wxASSERT( (unsigned)(i) <= Len() )
74
75 // ---------------------------------------------------------------------------
76 // Global functions complementing standard C string library replacements for
77 // strlen() and portable strcasecmp()
78 //---------------------------------------------------------------------------
79 // USE wx* FUNCTIONS IN wx/wxchar.h INSTEAD - THIS IS ONLY FOR BINARY COMPATIBILITY
80
81 // checks whether the passed in pointer is NULL and if the string is empty
82 inline bool WXDLLEXPORT IsEmpty(const char *p) { return (!p || !*p); }
83
84 // safe version of strlen() (returns 0 if passed NULL pointer)
85 inline size_t WXDLLEXPORT Strlen(const char *psz)
86 { return psz ? strlen(psz) : 0; }
87
88 // portable strcasecmp/_stricmp
89 inline int WXDLLEXPORT Stricmp(const char *psz1, const char *psz2)
90 {
91 #if defined(__VISUALC__) || ( defined(__MWERKS__) && defined(__INTEL__) )
92 return _stricmp(psz1, psz2);
93 #elif defined(__SC__)
94 return _stricmp(psz1, psz2);
95 #elif defined(__SALFORDC__)
96 return stricmp(psz1, psz2);
97 #elif defined(__BORLANDC__)
98 return stricmp(psz1, psz2);
99 #elif defined(__WATCOMC__)
100 return stricmp(psz1, psz2);
101 #elif defined(__UNIX__) || defined(__GNUWIN32__)
102 return strcasecmp(psz1, psz2);
103 #elif defined(__MWERKS__) && !defined(__INTEL__)
104 register char c1, c2;
105 do {
106 c1 = tolower(*psz1++);
107 c2 = tolower(*psz2++);
108 } while ( c1 && (c1 == c2) );
109
110 return c1 - c2;
111 #else
112 // almost all compilers/libraries provide this function (unfortunately under
113 // different names), that's why we don't implement our own which will surely
114 // be more efficient than this code (uncomment to use):
115 /*
116 register char c1, c2;
117 do {
118 c1 = tolower(*psz1++);
119 c2 = tolower(*psz2++);
120 } while ( c1 && (c1 == c2) );
121
122 return c1 - c2;
123 */
124
125 #error "Please define string case-insensitive compare for your OS/compiler"
126 #endif // OS/compiler
127 }
128
129 // ----------------------------------------------------------------------------
130 // global data
131 // ----------------------------------------------------------------------------
132
133 WXDLLEXPORT_DATA(extern const wxChar*) wxEmptyString;
134
135 // global pointer to empty string
136 WXDLLEXPORT_DATA(extern const wxChar*) g_szNul;
137
138 // return an empty wxString
139 class WXDLLEXPORT wxString; // not yet defined
140 inline const wxString& wxGetEmptyString() { return *(wxString *)&g_szNul; }
141
142 // ---------------------------------------------------------------------------
143 // string data prepended with some housekeeping info (used by wxString class),
144 // is never used directly (but had to be put here to allow inlining)
145 // ---------------------------------------------------------------------------
146 struct WXDLLEXPORT wxStringData
147 {
148 int nRefs; // reference count
149 size_t nDataLength, // actual string length
150 nAllocLength; // allocated memory size
151
152 // mimics declaration 'wxChar data[nAllocLength]'
153 wxChar* data() const { return (wxChar*)(this + 1); }
154
155 // empty string has a special ref count so it's never deleted
156 bool IsEmpty() const { return (nRefs == -1); }
157 bool IsShared() const { return (nRefs > 1); }
158
159 // lock/unlock
160 void Lock() { if ( !IsEmpty() ) nRefs++; }
161 void Unlock() { if ( !IsEmpty() && --nRefs == 0) free(this); }
162
163 // if we had taken control over string memory (GetWriteBuf), it's
164 // intentionally put in invalid state
165 void Validate(bool b) { nRefs = (b ? 1 : 0); }
166 bool IsValid() const { return (nRefs != 0); }
167 };
168
169 // ---------------------------------------------------------------------------
170 // types of multibyte<->Unicode conversions
171 // ---------------------------------------------------------------------------
172 class WXDLLEXPORT wxMBConv
173 {
174 public:
175 virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const;
176 virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const;
177 const wxWCharBuffer cMB2WC(const char *psz) const
178 {
179 size_t nLen = MB2WC((wchar_t *) NULL, psz, 0);
180 wxWCharBuffer buf(nLen);
181 MB2WC(WCSTRINGCAST buf, psz, nLen);
182 return buf;
183 }
184 const wxCharBuffer cWC2MB(const wchar_t *psz) const
185 {
186 size_t nLen = WC2MB((char *) NULL, psz, 0);
187 wxCharBuffer buf(nLen);
188 WC2MB(MBSTRINGCAST buf, psz, nLen);
189 return buf;
190 }
191 #if wxUSE_UNICODE
192 const wxWCharBuffer cMB2WX(const char *psz) const { return cMB2WC(psz); }
193 const wxCharBuffer cWX2MB(const wchar_t *psz) const { return cWC2MB(psz); }
194 const wchar_t* cWC2WX(const wchar_t *psz) const { return psz; }
195 const wchar_t* cMB2WC(const wchar_t *psz) const { return psz; }
196 #else
197 const char* cMB2WX(const char *psz) const { return psz; }
198 const char* cWX2MB(const char *psz) const { return psz; }
199 const wxCharBuffer cWC2WX(const wchar_t *psz) const { return cWC2MB(psz); }
200 const wxWCharBuffer cWX2WC(const char *psz) const { return cMB2WC(psz); }
201 #endif
202 };
203 WXDLLEXPORT_DATA(extern wxMBConv) wxConv_libc;
204
205 #define wxANOTHER_MBCONV(type) \
206 class type : public wxMBConv { \
207 public: \
208 virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const; \
209 virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const; \
210 }
211
212 WXDLLEXPORT_DATA(extern wxANOTHER_MBCONV(wxMBConv_file)) wxConv_file;
213 WXDLLEXPORT_DATA(extern wxANOTHER_MBCONV(wxMBConv_UTF7)) wxConv_UTF7;
214 WXDLLEXPORT_DATA(extern wxANOTHER_MBCONV(wxMBConv_UTF8)) wxConv_UTF8;
215 #if defined(__WXGTK__) && (GTK_MINOR_VERSION > 0)
216 WXDLLEXPORT_DATA(extern wxANOTHER_MBCONV(wxMBConv_gdk)) wxConv_gdk;
217 #endif // GTK > 1.0
218
219 class wxCharacterSet;
220 class WXDLLEXPORT wxCSConv : public wxMBConv
221 {
222 private:
223 wxChar *m_name;
224 wxCharacterSet *m_cset;
225 bool m_deferred;
226 void SetName(const wxChar *charset);
227 public:
228 wxCSConv(const wxChar *charset);
229 virtual ~wxCSConv();
230 void LoadNow();
231 virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const;
232 virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const;
233 };
234
235 WXDLLEXPORT_DATA(extern wxCSConv) wxConv_local;
236
237 WXDLLEXPORT_DATA(extern wxMBConv *) wxConv_current;
238
239 // filenames are multibyte on Unix and probably widechar on Windows?
240 #ifdef __UNIX__
241 #define wxMBFILES 1
242 #else
243 #define wxMBFILES 0
244 #endif
245
246 #if wxMBFILES
247 #define wxFNCONV(name) wxConv_file.cWX2MB(name)
248 #define FNSTRINGCAST MBSTRINGCAST
249 #else
250 #define wxFNCONV(name) name
251 #define FNSTRINGCAST WXSTRINGCAST
252 #endif
253
254 // ---------------------------------------------------------------------------
255 // This is (yet another one) String class for C++ programmers. It doesn't use
256 // any of "advanced" C++ features (i.e. templates, exceptions, namespaces...)
257 // thus you should be able to compile it with practicaly any C++ compiler.
258 // This class uses copy-on-write technique, i.e. identical strings share the
259 // same memory as long as neither of them is changed.
260 //
261 // This class aims to be as compatible as possible with the new standard
262 // std::string class, but adds some additional functions and should be at
263 // least as efficient than the standard implementation.
264 //
265 // Performance note: it's more efficient to write functions which take "const
266 // String&" arguments than "const char *" if you assign the argument to
267 // another string.
268 //
269 // It was compiled and tested under Win32, Linux (libc 5 & 6), Solaris 5.5.
270 //
271 // To do:
272 // - ressource support (string tables in ressources)
273 // - more wide character (UNICODE) support
274 // - regular expressions support
275 // ---------------------------------------------------------------------------
276
277 #ifdef WXSTRING_IS_WXOBJECT
278 class WXDLLEXPORT wxString : public wxObject
279 {
280 DECLARE_DYNAMIC_CLASS(wxString)
281 #else //WXSTRING_IS_WXOBJECT
282 class WXDLLEXPORT wxString
283 {
284 #endif //WXSTRING_IS_WXOBJECT
285
286 friend class WXDLLEXPORT wxArrayString;
287
288 // NB: special care was taken in arranging the member functions in such order
289 // that all inline functions can be effectively inlined, verify that all
290 // performace critical functions are still inlined if you change order!
291 private:
292 // points to data preceded by wxStringData structure with ref count info
293 wxChar *m_pchData;
294
295 // accessor to string data
296 wxStringData* GetStringData() const { return (wxStringData*)m_pchData - 1; }
297
298 // string (re)initialization functions
299 // initializes the string to the empty value (must be called only from
300 // ctors, use Reinit() otherwise)
301 void Init() { m_pchData = (wxChar *)g_szNul; }
302 // initializaes the string with (a part of) C-string
303 void InitWith(const wxChar *psz, size_t nPos = 0, size_t nLen = wxSTRING_MAXLEN);
304 // as Init, but also frees old data
305 void Reinit() { GetStringData()->Unlock(); Init(); }
306
307 // memory allocation
308 // allocates memory for string of lenght nLen
309 void AllocBuffer(size_t nLen);
310 // copies data to another string
311 void AllocCopy(wxString&, int, int) const;
312 // effectively copies data to string
313 void AssignCopy(size_t, const wxChar *);
314
315 // append a (sub)string
316 void ConcatSelf(int nLen, const wxChar *src);
317
318 // functions called before writing to the string: they copy it if there
319 // are other references to our data (should be the only owner when writing)
320 void CopyBeforeWrite();
321 void AllocBeforeWrite(size_t);
322
323 // this method is not implemented - there is _no_ conversion from int to
324 // string, you're doing something wrong if the compiler wants to call it!
325 //
326 // try `s << i' or `s.Printf("%d", i)' instead
327 wxString(int);
328 wxString(long);
329
330 public:
331 // constructors and destructor
332 // ctor for an empty string
333 wxString() { Init(); }
334 // copy ctor
335 wxString(const wxString& stringSrc)
336 {
337 wxASSERT( stringSrc.GetStringData()->IsValid() );
338
339 if ( stringSrc.IsEmpty() ) {
340 // nothing to do for an empty string
341 Init();
342 }
343 else {
344 m_pchData = stringSrc.m_pchData; // share same data
345 GetStringData()->Lock(); // => one more copy
346 }
347 }
348 // string containing nRepeat copies of ch
349 wxString(wxChar ch, size_t nRepeat = 1);
350 // ctor takes first nLength characters from C string
351 // (default value of wxSTRING_MAXLEN means take all the string)
352 wxString(const wxChar *psz, size_t nLength = wxSTRING_MAXLEN)
353 { InitWith(psz, 0, nLength); }
354 #if wxUSE_UNICODE
355 // from multibyte string
356 // (NB: nLength is right now number of Unicode characters, not
357 // characters in psz! So try not to use it yet!)
358 wxString(const char *psz, wxMBConv& conv = wxConv_libc, size_t nLength = wxSTRING_MAXLEN);
359 // from wxWCharBuffer (i.e. return from wxGetString)
360 wxString(const wxWCharBuffer& psz)
361 { InitWith(psz, 0, wxSTRING_MAXLEN); }
362 #else
363 // from C string (for compilers using unsigned char)
364 wxString(const unsigned char* psz, size_t nLength = wxSTRING_MAXLEN)
365 { InitWith((const char*)psz, 0, nLength); }
366 // from multibyte string
367 wxString(const char *psz, wxMBConv& WXUNUSED(conv), size_t nLength = wxSTRING_MAXLEN)
368 { InitWith(psz, 0, nLength); }
369 // from wide (Unicode) string
370 wxString(const wchar_t *pwz);
371 // from wxCharBuffer
372 wxString(const wxCharBuffer& psz)
373 { InitWith(psz, 0, wxSTRING_MAXLEN); }
374 #endif
375 // dtor is not virtual, this class must not be inherited from!
376 ~wxString() { GetStringData()->Unlock(); }
377
378 // generic attributes & operations
379 // as standard strlen()
380 size_t Len() const { return GetStringData()->nDataLength; }
381 // string contains any characters?
382 bool IsEmpty() const { return Len() == 0; }
383 // empty string is "FALSE", so !str will return TRUE
384 bool operator!() const { return IsEmpty(); }
385 // empty string contents
386 void Empty()
387 {
388 if ( !IsEmpty() )
389 Reinit();
390
391 // should be empty
392 wxASSERT( GetStringData()->nDataLength == 0 );
393 }
394 // empty the string and free memory
395 void Clear()
396 {
397 if ( !GetStringData()->IsEmpty() )
398 Reinit();
399
400 wxASSERT( GetStringData()->nDataLength == 0 ); // should be empty
401 wxASSERT( GetStringData()->nAllocLength == 0 ); // and not own any memory
402 }
403
404 // contents test
405 // Is an ascii value
406 bool IsAscii() const;
407 // Is a number
408 bool IsNumber() const;
409 // Is a word
410 bool IsWord() const;
411
412 // data access (all indexes are 0 based)
413 // read access
414 wxChar GetChar(size_t n) const
415 { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
416 // read/write access
417 wxChar& GetWritableChar(size_t n)
418 { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
419 // write access
420 void SetChar(size_t n, wxChar ch)
421 { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); m_pchData[n] = ch; }
422
423 // get last character
424 wxChar Last() const
425 { wxASSERT( !IsEmpty() ); return m_pchData[Len() - 1]; }
426 // get writable last character
427 wxChar& Last()
428 { wxASSERT( !IsEmpty() ); CopyBeforeWrite(); return m_pchData[Len()-1]; }
429
430 // under Unix it is tested with configure, assume it works on other
431 // platforms (there might be overloading problems if size_t and int are
432 // the same type)
433 #if !defined(__UNIX__) || wxUSE_SIZE_T_STRING_OPERATOR
434 // operator version of GetChar
435 wxChar operator[](size_t n) const
436 { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
437 #endif
438
439 // operator version of GetChar
440 wxChar operator[](int n) const
441 { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
442 // operator version of GetWritableChar
443 wxChar& operator[](size_t n)
444 { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
445
446 // implicit conversion to C string
447 operator const wxChar*() const { return m_pchData; }
448 // explicit conversion to C string (use this with printf()!)
449 const wxChar* c_str() const { return m_pchData; }
450 //
451 const wxChar* GetData() const { return m_pchData; }
452 #if wxUSE_UNICODE
453 const wxCharBuffer mb_str(wxMBConv& conv = wxConv_libc) const { return conv.cWC2MB(m_pchData); }
454 const wxChar* wc_str(wxMBConv& WXUNUSED(conv) = wxConv_libc) const { return m_pchData; }
455 #if wxMBFILES
456 const wxCharBuffer fn_str() const { return mb_str(wxConv_file); }
457 #else
458 const wxChar* fn_str() const { return m_pchData; }
459 #endif
460 #else
461 const wxChar* mb_str(wxMBConv& WXUNUSED(conv) = wxConv_libc ) const { return m_pchData; }
462 const wxWCharBuffer wc_str(wxMBConv& conv) const { return conv.cMB2WC(m_pchData); }
463 const wxChar* fn_str() const { return m_pchData; }
464 #endif
465 // for convenience
466 const wxWX2MBbuf mbc_str() const { return mb_str(*wxConv_current); }
467
468 // overloaded assignment
469 // from another wxString
470 wxString& operator=(const wxString& stringSrc);
471 // from a character
472 wxString& operator=(wxChar ch);
473 // from a C string
474 wxString& operator=(const wxChar *psz);
475 #if wxUSE_UNICODE
476 // from wxWCharBuffer
477 wxString& operator=(const wxWCharBuffer& psz) { return operator=((const wchar_t *)psz); }
478 #else
479 // from another kind of C string
480 wxString& operator=(const unsigned char* psz);
481 // from a wide string
482 wxString& operator=(const wchar_t *pwz);
483 // from wxCharBuffer
484 wxString& operator=(const wxCharBuffer& psz) { return operator=((const char *)psz); }
485 #endif
486
487 // string concatenation
488 // in place concatenation
489 /*
490 Concatenate and return the result. Note that the left to right
491 associativity of << allows to write things like "str << str1 << str2
492 << ..." (unlike with +=)
493 */
494 // string += string
495 wxString& operator<<(const wxString& s)
496 {
497 wxASSERT( s.GetStringData()->IsValid() );
498
499 ConcatSelf(s.Len(), s);
500 return *this;
501 }
502 // string += C string
503 wxString& operator<<(const wxChar *psz)
504 { ConcatSelf(wxStrlen(psz), psz); return *this; }
505 // string += char
506 wxString& operator<<(wxChar ch) { ConcatSelf(1, &ch); return *this; }
507
508 // string += string
509 void operator+=(const wxString& s) { (void)operator<<(s); }
510 // string += C string
511 void operator+=(const wxChar *psz) { (void)operator<<(psz); }
512 // string += char
513 void operator+=(wxChar ch) { (void)operator<<(ch); }
514
515 // string += buffer (i.e. from wxGetString)
516 #if wxUSE_UNICODE
517 wxString& operator<<(const wxWCharBuffer& s) { (void)operator<<((const wchar_t *)s); return *this; }
518 void operator+=(const wxWCharBuffer& s) { (void)operator<<((const wchar_t *)s); }
519 #else
520 wxString& operator<<(const wxCharBuffer& s) { (void)operator<<((const char *)s); return *this; }
521 void operator+=(const wxCharBuffer& s) { (void)operator<<((const char *)s); }
522 #endif
523
524 // string += C string
525 wxString& Append(const wxChar* psz)
526 { ConcatSelf(wxStrlen(psz), psz); return *this; }
527 // append count copies of given character
528 wxString& Append(wxChar ch, size_t count = 1u)
529 { wxString str(ch, count); return *this << str; }
530
531 // prepend a string, return the string itself
532 wxString& Prepend(const wxString& str)
533 { *this = str + *this; return *this; }
534
535 // non-destructive concatenation
536 //
537 friend wxString WXDLLEXPORT operator+(const wxString& string1, const wxString& string2);
538 //
539 friend wxString WXDLLEXPORT operator+(const wxString& string, wxChar ch);
540 //
541 friend wxString WXDLLEXPORT operator+(wxChar ch, const wxString& string);
542 //
543 friend wxString WXDLLEXPORT operator+(const wxString& string, const wxChar *psz);
544 //
545 friend wxString WXDLLEXPORT operator+(const wxChar *psz, const wxString& string);
546
547 // stream-like functions
548 // insert an int into string
549 wxString& operator<<(int i);
550 // insert a float into string
551 wxString& operator<<(float f);
552 // insert a double into string
553 wxString& operator<<(double d);
554
555 // string comparison
556 // case-sensitive comparison (returns a value < 0, = 0 or > 0)
557 int Cmp(const wxChar *psz) const { return wxStrcmp(c_str(), psz); }
558 // same as Cmp() but not case-sensitive
559 int CmpNoCase(const wxChar *psz) const { return wxStricmp(c_str(), psz); }
560 // test for the string equality, either considering case or not
561 // (if compareWithCase then the case matters)
562 bool IsSameAs(const wxChar *psz, bool compareWithCase = TRUE) const
563 { return (compareWithCase ? Cmp(psz) : CmpNoCase(psz)) == 0; }
564
565 // simple sub-string extraction
566 // return substring starting at nFirst of length nCount (or till the end
567 // if nCount = default value)
568 wxString Mid(size_t nFirst, size_t nCount = wxSTRING_MAXLEN) const;
569
570 // operator version of Mid()
571 wxString operator()(size_t start, size_t len) const
572 { return Mid(start, len); }
573
574 // get first nCount characters
575 wxString Left(size_t nCount) const;
576 // get last nCount characters
577 wxString Right(size_t nCount) const;
578 // get all characters before the first occurence of ch
579 // (returns the whole string if ch not found)
580 wxString BeforeFirst(wxChar ch) const;
581 // get all characters before the last occurence of ch
582 // (returns empty string if ch not found)
583 wxString BeforeLast(wxChar ch) const;
584 // get all characters after the first occurence of ch
585 // (returns empty string if ch not found)
586 wxString AfterFirst(wxChar ch) const;
587 // get all characters after the last occurence of ch
588 // (returns the whole string if ch not found)
589 wxString AfterLast(wxChar ch) const;
590
591 // for compatibility only, use more explicitly named functions above
592 wxString Before(wxChar ch) const { return BeforeLast(ch); }
593 wxString After(wxChar ch) const { return AfterFirst(ch); }
594
595 // case conversion
596 // convert to upper case in place, return the string itself
597 wxString& MakeUpper();
598 // convert to upper case, return the copy of the string
599 // Here's something to remember: BC++ doesn't like returns in inlines.
600 wxString Upper() const ;
601 // convert to lower case in place, return the string itself
602 wxString& MakeLower();
603 // convert to lower case, return the copy of the string
604 wxString Lower() const ;
605
606 // trimming/padding whitespace (either side) and truncating
607 // remove spaces from left or from right (default) side
608 wxString& Trim(bool bFromRight = TRUE);
609 // add nCount copies chPad in the beginning or at the end (default)
610 wxString& Pad(size_t nCount, wxChar chPad = _T(' '), bool bFromRight = TRUE);
611 // truncate string to given length
612 wxString& Truncate(size_t uiLen);
613
614 // searching and replacing
615 // searching (return starting index, or -1 if not found)
616 int Find(wxChar ch, bool bFromEnd = FALSE) const; // like strchr/strrchr
617 // searching (return starting index, or -1 if not found)
618 int Find(const wxChar *pszSub) const; // like strstr
619 // replace first (or all of bReplaceAll) occurences of substring with
620 // another string, returns the number of replacements made
621 size_t Replace(const wxChar *szOld,
622 const wxChar *szNew,
623 bool bReplaceAll = TRUE);
624
625 // check if the string contents matches a mask containing '*' and '?'
626 bool Matches(const wxChar *szMask) const;
627
628 // formated input/output
629 // as sprintf(), returns the number of characters written or < 0 on error
630 int Printf(const wxChar *pszFormat, ...);
631 // as vprintf(), returns the number of characters written or < 0 on error
632 int PrintfV(const wxChar* pszFormat, va_list argptr);
633
634 // raw access to string memory
635 // ensure that string has space for at least nLen characters
636 // only works if the data of this string is not shared
637 void Alloc(size_t nLen);
638 // minimize the string's memory
639 // only works if the data of this string is not shared
640 void Shrink();
641 // get writable buffer of at least nLen bytes. Unget() *must* be called
642 // a.s.a.p. to put string back in a reasonable state!
643 wxChar *GetWriteBuf(size_t nLen);
644 // call this immediately after GetWriteBuf() has been used
645 void UngetWriteBuf();
646
647 // wxWindows version 1 compatibility functions
648
649 // use Mid()
650 wxString SubString(size_t from, size_t to) const
651 { return Mid(from, (to - from + 1)); }
652 // values for second parameter of CompareTo function
653 enum caseCompare {exact, ignoreCase};
654 // values for first parameter of Strip function
655 enum stripType {leading = 0x1, trailing = 0x2, both = 0x3};
656
657 // use Printf()
658 int sprintf(const wxChar *pszFormat, ...);
659
660 // use Cmp()
661 inline int CompareTo(const wxChar* psz, caseCompare cmp = exact) const
662 { return cmp == exact ? Cmp(psz) : CmpNoCase(psz); }
663
664 // use Len
665 size_t Length() const { return Len(); }
666 // Count the number of characters
667 int Freq(wxChar ch) const;
668 // use MakeLower
669 void LowerCase() { MakeLower(); }
670 // use MakeUpper
671 void UpperCase() { MakeUpper(); }
672 // use Trim except that it doesn't change this string
673 wxString Strip(stripType w = trailing) const;
674
675 // use Find (more general variants not yet supported)
676 size_t Index(const wxChar* psz) const { return Find(psz); }
677 size_t Index(wxChar ch) const { return Find(ch); }
678 // use Truncate
679 wxString& Remove(size_t pos) { return Truncate(pos); }
680 wxString& RemoveLast() { return Truncate(Len() - 1); }
681
682 wxString& Remove(size_t nStart, size_t nLen) { return erase( nStart, nLen ); }
683
684 // use Find()
685 int First( const wxChar ch ) const { return Find(ch); }
686 int First( const wxChar* psz ) const { return Find(psz); }
687 int First( const wxString &str ) const { return Find(str); }
688 int Last( const wxChar ch ) const { return Find(ch, TRUE); }
689 bool Contains(const wxString& str) const { return Find(str) != -1; }
690
691 // use IsEmpty()
692 bool IsNull() const { return IsEmpty(); }
693
694 #ifdef wxSTD_STRING_COMPATIBILITY
695 // std::string compatibility functions
696
697 // an 'invalid' value for string index
698 static const size_t npos;
699
700 // constructors
701 // take nLen chars starting at nPos
702 wxString(const wxString& str, size_t nPos, size_t nLen)
703 {
704 wxASSERT( str.GetStringData()->IsValid() );
705 InitWith(str.c_str(), nPos, nLen == npos ? 0 : nLen);
706 }
707 // take all characters from pStart to pEnd
708 wxString(const void *pStart, const void *pEnd);
709
710 // lib.string.capacity
711 // return the length of the string
712 size_t size() const { return Len(); }
713 // return the length of the string
714 size_t length() const { return Len(); }
715 // return the maximum size of the string
716 size_t max_size() const { return wxSTRING_MAXLEN; }
717 // resize the string, filling the space with c if c != 0
718 void resize(size_t nSize, wxChar ch = _T('\0'));
719 // delete the contents of the string
720 void clear() { Empty(); }
721 // returns true if the string is empty
722 bool empty() const { return IsEmpty(); }
723
724 // lib.string.access
725 // return the character at position n
726 wxChar at(size_t n) const { return GetChar(n); }
727 // returns the writable character at position n
728 wxChar& at(size_t n) { return GetWritableChar(n); }
729
730 // lib.string.modifiers
731 // append a string
732 wxString& append(const wxString& str)
733 { *this += str; return *this; }
734 // append elements str[pos], ..., str[pos+n]
735 wxString& append(const wxString& str, size_t pos, size_t n)
736 { ConcatSelf(n, str.c_str() + pos); return *this; }
737 // append first n (or all if n == npos) characters of sz
738 wxString& append(const wxChar *sz, size_t n = npos)
739 { ConcatSelf(n == npos ? wxStrlen(sz) : n, sz); return *this; }
740
741 // append n copies of ch
742 wxString& append(size_t n, wxChar ch) { return Pad(n, ch); }
743
744 // same as `this_string = str'
745 wxString& assign(const wxString& str) { return (*this) = str; }
746 // same as ` = str[pos..pos + n]
747 wxString& assign(const wxString& str, size_t pos, size_t n)
748 { return *this = wxString((const wxChar *)str + pos, n); }
749 // same as `= first n (or all if n == npos) characters of sz'
750 wxString& assign(const wxChar *sz, size_t n = npos)
751 { return *this = wxString(sz, n); }
752 // same as `= n copies of ch'
753 wxString& assign(size_t n, wxChar ch)
754 { return *this = wxString(ch, n); }
755
756 // insert another string
757 wxString& insert(size_t nPos, const wxString& str);
758 // insert n chars of str starting at nStart (in str)
759 wxString& insert(size_t nPos, const wxString& str, size_t nStart, size_t n)
760 { return insert(nPos, wxString((const wxChar *)str + nStart, n)); }
761
762 // insert first n (or all if n == npos) characters of sz
763 wxString& insert(size_t nPos, const wxChar *sz, size_t n = npos)
764 { return insert(nPos, wxString(sz, n)); }
765 // insert n copies of ch
766 wxString& insert(size_t nPos, size_t n, wxChar ch)
767 { return insert(nPos, wxString(ch, n)); }
768
769 // delete characters from nStart to nStart + nLen
770 wxString& erase(size_t nStart = 0, size_t nLen = npos);
771
772 // replaces the substring of length nLen starting at nStart
773 wxString& replace(size_t nStart, size_t nLen, const wxChar* sz);
774 // replaces the substring with nCount copies of ch
775 wxString& replace(size_t nStart, size_t nLen, size_t nCount, wxChar ch);
776 // replaces a substring with another substring
777 wxString& replace(size_t nStart, size_t nLen,
778 const wxString& str, size_t nStart2, size_t nLen2);
779 // replaces the substring with first nCount chars of sz
780 wxString& replace(size_t nStart, size_t nLen,
781 const wxChar* sz, size_t nCount);
782
783 // swap two strings
784 void swap(wxString& str);
785
786 // All find() functions take the nStart argument which specifies the
787 // position to start the search on, the default value is 0. All functions
788 // return npos if there were no match.
789
790 // find a substring
791 size_t find(const wxString& str, size_t nStart = 0) const;
792
793 // VC++ 1.5 can't cope with this syntax.
794 #if !defined(__VISUALC__) || defined(__WIN32__)
795 // find first n characters of sz
796 size_t find(const wxChar* sz, size_t nStart = 0, size_t n = npos) const;
797 #endif
798
799 // Gives a duplicate symbol (presumably a case-insensitivity problem)
800 #if !defined(__BORLANDC__)
801 // find the first occurence of character ch after nStart
802 size_t find(wxChar ch, size_t nStart = 0) const;
803 #endif
804 // rfind() family is exactly like find() but works right to left
805
806 // as find, but from the end
807 size_t rfind(const wxString& str, size_t nStart = npos) const;
808
809 // VC++ 1.5 can't cope with this syntax.
810 #if !defined(__VISUALC__) || defined(__WIN32__)
811 // as find, but from the end
812 size_t rfind(const wxChar* sz, size_t nStart = npos,
813 size_t n = npos) const;
814 // as find, but from the end
815 size_t rfind(wxChar ch, size_t nStart = npos) const;
816 #endif
817
818 // find first/last occurence of any character in the set
819
820 //
821 size_t find_first_of(const wxString& str, size_t nStart = 0) const;
822 //
823 size_t find_first_of(const wxChar* sz, size_t nStart = 0) const;
824 // same as find(char, size_t)
825 size_t find_first_of(wxChar c, size_t nStart = 0) const;
826 //
827 size_t find_last_of (const wxString& str, size_t nStart = npos) const;
828 //
829 size_t find_last_of (const wxChar* s, size_t nStart = npos) const;
830 // same as rfind(char, size_t)
831 size_t find_last_of (wxChar c, size_t nStart = npos) const;
832
833 // find first/last occurence of any character not in the set
834
835 //
836 size_t find_first_not_of(const wxString& str, size_t nStart = 0) const;
837 //
838 size_t find_first_not_of(const wxChar* s, size_t nStart = 0) const;
839 //
840 size_t find_first_not_of(wxChar ch, size_t nStart = 0) const;
841 //
842 size_t find_last_not_of(const wxString& str, size_t nStart=npos) const;
843 //
844 size_t find_last_not_of(const wxChar* s, size_t nStart = npos) const;
845 //
846 size_t find_last_not_of(wxChar ch, size_t nStart = npos) const;
847
848 // All compare functions return -1, 0 or 1 if the [sub]string is less,
849 // equal or greater than the compare() argument.
850
851 // just like strcmp()
852 int compare(const wxString& str) const { return Cmp(str); }
853 // comparison with a substring
854 int compare(size_t nStart, size_t nLen, const wxString& str) const;
855 // comparison of 2 substrings
856 int compare(size_t nStart, size_t nLen,
857 const wxString& str, size_t nStart2, size_t nLen2) const;
858 // just like strcmp()
859 int compare(const wxChar* sz) const { return Cmp(sz); }
860 // substring comparison with first nCount characters of sz
861 int compare(size_t nStart, size_t nLen,
862 const wxChar* sz, size_t nCount = npos) const;
863
864 // substring extraction
865 wxString substr(size_t nStart = 0, size_t nLen = npos) const;
866 #endif // wxSTD_STRING_COMPATIBILITY
867 };
868
869 // ----------------------------------------------------------------------------
870 // The string array uses it's knowledge of internal structure of the wxString
871 // class to optimize string storage. Normally, we would store pointers to
872 // string, but as wxString is, in fact, itself a pointer (sizeof(wxString) is
873 // sizeof(char *)) we store these pointers instead. The cast to "wxString *" is
874 // really all we need to turn such pointer into a string!
875 //
876 // Of course, it can be called a dirty hack, but we use twice less memory and
877 // this approach is also more speed efficient, so it's probably worth it.
878 //
879 // Usage notes: when a string is added/inserted, a new copy of it is created,
880 // so the original string may be safely deleted. When a string is retrieved
881 // from the array (operator[] or Item() method), a reference is returned.
882 // ----------------------------------------------------------------------------
883 class WXDLLEXPORT wxArrayString
884 {
885 public:
886 // type of function used by wxArrayString::Sort()
887 typedef int (*CompareFunction)(const wxString& first,
888 const wxString& second);
889
890 // constructors and destructor
891 // default ctor
892 wxArrayString();
893 // copy ctor
894 wxArrayString(const wxArrayString& array);
895 // assignment operator
896 wxArrayString& operator=(const wxArrayString& src);
897 // not virtual, this class should not be derived from
898 ~wxArrayString();
899
900 // memory management
901 // empties the list, but doesn't release memory
902 void Empty();
903 // empties the list and releases memory
904 void Clear();
905 // preallocates memory for given number of items
906 void Alloc(size_t nCount);
907 // minimzes the memory usage (by freeing all extra memory)
908 void Shrink();
909
910 // simple accessors
911 // number of elements in the array
912 size_t GetCount() const { return m_nCount; }
913 // is it empty?
914 bool IsEmpty() const { return m_nCount == 0; }
915 // number of elements in the array (GetCount is preferred API)
916 size_t Count() const { return m_nCount; }
917
918 // items access (range checking is done in debug version)
919 // get item at position uiIndex
920 wxString& Item(size_t nIndex) const
921 { wxASSERT( nIndex < m_nCount ); return *(wxString *)&(m_pItems[nIndex]); }
922 // same as Item()
923 wxString& operator[](size_t nIndex) const { return Item(nIndex); }
924 // get last item
925 wxString& Last() const { wxASSERT( !IsEmpty() ); return Item(Count() - 1); }
926
927 // item management
928 // Search the element in the array, starting from the beginning if
929 // bFromEnd is FALSE or from end otherwise. If bCase, comparison is case
930 // sensitive (default). Returns index of the first item matched or
931 // wxNOT_FOUND
932 int Index (const wxChar *sz, bool bCase = TRUE, bool bFromEnd = FALSE) const;
933 // add new element at the end
934 void Add(const wxString& str);
935 // add new element at given position
936 void Insert(const wxString& str, size_t uiIndex);
937 // remove first item matching this value
938 void Remove(const wxChar *sz);
939 // remove item by index
940 void Remove(size_t nIndex);
941
942 // sorting
943 // sort array elements in alphabetical order (or reversed alphabetical
944 // order if reverseOrder parameter is TRUE)
945 void Sort(bool reverseOrder = FALSE);
946 // sort array elements using specified comparaison function
947 void Sort(CompareFunction compareFunction);
948
949 private:
950 void Grow(); // makes array bigger if needed
951 void Free(); // free the string stored
952
953 void DoSort(); // common part of all Sort() variants
954
955 size_t m_nSize, // current size of the array
956 m_nCount; // current number of elements
957
958 wxChar **m_pItems; // pointer to data
959 };
960
961 // ---------------------------------------------------------------------------
962 // wxString comparison functions: operator versions are always case sensitive
963 // ---------------------------------------------------------------------------
964 //
965 inline bool operator==(const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) == 0); }
966 //
967 inline bool operator==(const wxString& s1, const wxChar * s2) { return (s1.Cmp(s2) == 0); }
968 //
969 inline bool operator==(const wxChar * s1, const wxString& s2) { return (s2.Cmp(s1) == 0); }
970 //
971 inline bool operator!=(const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) != 0); }
972 //
973 inline bool operator!=(const wxString& s1, const wxChar * s2) { return (s1.Cmp(s2) != 0); }
974 //
975 inline bool operator!=(const wxChar * s1, const wxString& s2) { return (s2.Cmp(s1) != 0); }
976 //
977 inline bool operator< (const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) < 0); }
978 //
979 inline bool operator< (const wxString& s1, const wxChar * s2) { return (s1.Cmp(s2) < 0); }
980 //
981 inline bool operator< (const wxChar * s1, const wxString& s2) { return (s2.Cmp(s1) > 0); }
982 //
983 inline bool operator> (const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) > 0); }
984 //
985 inline bool operator> (const wxString& s1, const wxChar * s2) { return (s1.Cmp(s2) > 0); }
986 //
987 inline bool operator> (const wxChar * s1, const wxString& s2) { return (s2.Cmp(s1) < 0); }
988 //
989 inline bool operator<=(const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) <= 0); }
990 //
991 inline bool operator<=(const wxString& s1, const wxChar * s2) { return (s1.Cmp(s2) <= 0); }
992 //
993 inline bool operator<=(const wxChar * s1, const wxString& s2) { return (s2.Cmp(s1) >= 0); }
994 //
995 inline bool operator>=(const wxString& s1, const wxString& s2) { return (s1.Cmp(s2) >= 0); }
996 //
997 inline bool operator>=(const wxString& s1, const wxChar * s2) { return (s1.Cmp(s2) >= 0); }
998 //
999 inline bool operator>=(const wxChar * s1, const wxString& s2) { return (s2.Cmp(s1) <= 0); }
1000
1001 wxString WXDLLEXPORT operator+(const wxString& string1, const wxString& string2);
1002 wxString WXDLLEXPORT operator+(const wxString& string, wxChar ch);
1003 wxString WXDLLEXPORT operator+(wxChar ch, const wxString& string);
1004 wxString WXDLLEXPORT operator+(const wxString& string, const wxChar *psz);
1005 wxString WXDLLEXPORT operator+(const wxChar *psz, const wxString& string);
1006 #if wxUSE_UNICODE
1007 inline wxString WXDLLEXPORT operator+(const wxString& string, const wxWCharBuffer& buf)
1008 { return string + (const wchar_t *)buf; }
1009 inline wxString WXDLLEXPORT operator+(const wxWCharBuffer& buf, const wxString& string)
1010 { return (const wchar_t *)buf + string; }
1011 #else
1012 inline wxString WXDLLEXPORT operator+(const wxString& string, const wxCharBuffer& buf)
1013 { return string + (const char *)buf; }
1014 inline wxString WXDLLEXPORT operator+(const wxCharBuffer& buf, const wxString& string)
1015 { return (const char *)buf + string; }
1016 #endif
1017
1018 // ---------------------------------------------------------------------------
1019 // Implementation only from here until the end of file
1020 // ---------------------------------------------------------------------------
1021
1022 #ifdef wxSTD_STRING_COMPATIBILITY
1023
1024 #include "wx/ioswrap.h"
1025
1026 WXDLLEXPORT istream& operator>>(istream& is, wxString& str);
1027
1028 #endif // wxSTD_STRING_COMPATIBILITY
1029
1030 #endif // _WX_WXSTRINGH__
wxWidgets (Impactor)