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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: string.cpp
3 // Purpose: wxString class
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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
13 #pragma implementation "string.h"
14 #endif
15
16 /*
17 * About ref counting:
18 * 1) all empty strings use g_strEmpty, nRefs = -1 (set in Init())
19 * 2) AllocBuffer() sets nRefs to 1, Lock() increments it by one
20 * 3) Unlock() decrements nRefs and frees memory if it goes to 0
21 */
22
23 // ===========================================================================
24 // headers, declarations, constants
25 // ===========================================================================
26
27 // For compilers that support precompilation, includes "wx.h".
28 #include "wx/wxprec.h"
29
30 #ifdef __BORLANDC__
31 #pragma hdrstop
32 #endif
33
34 #ifndef WX_PRECOMP
35 #include "wx/defs.h"
36 #include "wx/string.h"
37 #include "wx/intl.h"
38 #include "wx/thread.h"
39 #endif
40
41 #include <ctype.h>
42 #include <string.h>
43 #include <stdlib.h>
44
45 #ifdef __SALFORDC__
46 #include <clib.h>
47 #endif
48
49 // allocating extra space for each string consumes more memory but speeds up
50 // the concatenation operations (nLen is the current string's length)
51 // NB: EXTRA_ALLOC must be >= 0!
52 #define EXTRA_ALLOC (19 - nLen % 16)
53
54 // ---------------------------------------------------------------------------
55 // static class variables definition
56 // ---------------------------------------------------------------------------
57
58 #if defined(__VISAGECPP__) && __IBMCPP__ >= 400
59 // must define this static for VA or else you get multiply defined symbols
60 // everywhere
61 const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100;
62 #endif // Visual Age
63
64 #if !wxUSE_STL
65 const size_t wxStringBase::npos = wxSTRING_MAXLEN;
66 #endif
67
68 // ----------------------------------------------------------------------------
69 // static data
70 // ----------------------------------------------------------------------------
71
72 #if wxUSE_STL
73
74 extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = _T("");
75
76 #else
77
78 // for an empty string, GetStringData() will return this address: this
79 // structure has the same layout as wxStringData and it's data() method will
80 // return the empty string (dummy pointer)
81 static const struct
82 {
83 wxStringData data;
84 wxChar dummy;
85 } g_strEmpty = { {-1, 0, 0}, wxT('\0') };
86
87 // empty C style string: points to 'string data' byte of g_strEmpty
88 extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = &g_strEmpty.dummy;
89
90 #endif
91
92 // ----------------------------------------------------------------------------
93 // global functions
94 // ----------------------------------------------------------------------------
95
96 #if wxUSE_STD_IOSTREAM
97
98 // MS Visual C++ version 5.0 provides the new STL headers as well as the old
99 // iostream ones.
100 //
101 // ATTN: you can _not_ use both of these in the same program!
102
103 wxSTD istream& operator>>(wxSTD istream& is, wxString& WXUNUSED(str))
104 {
105 #if 0
106 int w = is.width(0);
107 if ( is.ipfx(0) ) {
108 streambuf *sb = is.rdbuf();
109 str.erase();
110 while ( true ) {
111 int ch = sb->sbumpc ();
112 if ( ch == EOF ) {
113 is.setstate(ios::eofbit);
114 break;
115 }
116 else if ( isspace(ch) ) {
117 sb->sungetc();
118 break;
119 }
120
121 str += ch;
122 if ( --w == 1 )
123 break;
124 }
125 }
126
127 is.isfx();
128 if ( str.length() == 0 )
129 is.setstate(ios::failbit);
130 #endif
131 return is;
132 }
133
134 wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str)
135 {
136 os << str.c_str();
137 return os;
138 }
139
140 #endif // wxUSE_STD_IOSTREAM
141
142 // ----------------------------------------------------------------------------
143 // private classes
144 // ----------------------------------------------------------------------------
145
146 // this small class is used to gather statistics for performance tuning
147 //#define WXSTRING_STATISTICS
148 #ifdef WXSTRING_STATISTICS
149 class Averager
150 {
151 public:
152 Averager(const wxChar *sz) { m_sz = sz; m_nTotal = m_nCount = 0; }
153 ~Averager()
154 { wxPrintf("wxString: average %s = %f\n", m_sz, ((float)m_nTotal)/m_nCount); }
155
156 void Add(size_t n) { m_nTotal += n; m_nCount++; }
157
158 private:
159 size_t m_nCount, m_nTotal;
160 const wxChar *m_sz;
161 } g_averageLength("allocation size"),
162 g_averageSummandLength("summand length"),
163 g_averageConcatHit("hit probability in concat"),
164 g_averageInitialLength("initial string length");
165
166 #define STATISTICS_ADD(av, val) g_average##av.Add(val)
167 #else
168 #define STATISTICS_ADD(av, val)
169 #endif // WXSTRING_STATISTICS
170
171 #if !wxUSE_STL
172
173 // ===========================================================================
174 // wxStringData class deallocation
175 // ===========================================================================
176
177 #if defined(__VISUALC__) && defined(_MT) && !defined(_DLL)
178 # pragma message (__FILE__ ": building with Multithreaded non DLL runtime has a performance impact on wxString!")
179 void wxStringData::Free()
180 {
181 free(this);
182 }
183 #endif
184
185 // ===========================================================================
186 // wxStringBase
187 // ===========================================================================
188
189 // takes nLength elements of psz starting at nPos
190 void wxStringBase::InitWith(const wxChar *psz, size_t nPos, size_t nLength)
191 {
192 Init();
193
194 // if the length is not given, assume the string to be NUL terminated
195 if ( nLength == npos ) {
196 wxASSERT_MSG( nPos <= wxStrlen(psz), _T("index out of bounds") );
197
198 nLength = wxStrlen(psz + nPos);
199 }
200
201 STATISTICS_ADD(InitialLength, nLength);
202
203 if ( nLength > 0 ) {
204 // trailing '\0' is written in AllocBuffer()
205 if ( !AllocBuffer(nLength) ) {
206 wxFAIL_MSG( _T("out of memory in wxStringBase::InitWith") );
207 return;
208 }
209 memcpy(m_pchData, psz + nPos, nLength*sizeof(wxChar));
210 }
211 }
212
213 // poor man's iterators are "void *" pointers
214 wxStringBase::wxStringBase(const void *pStart, const void *pEnd)
215 {
216 InitWith((const wxChar *)pStart, 0,
217 (const wxChar *)pEnd - (const wxChar *)pStart);
218 }
219
220 wxStringBase::wxStringBase(size_type n, wxChar ch)
221 {
222 Init();
223 append(n, ch);
224 }
225
226 // ---------------------------------------------------------------------------
227 // memory allocation
228 // ---------------------------------------------------------------------------
229
230 // allocates memory needed to store a C string of length nLen
231 bool wxStringBase::AllocBuffer(size_t nLen)
232 {
233 // allocating 0 sized buffer doesn't make sense, all empty strings should
234 // reuse g_strEmpty
235 wxASSERT( nLen > 0 );
236
237 // make sure that we don't overflow
238 wxASSERT( nLen < (INT_MAX / sizeof(wxChar)) -
239 (sizeof(wxStringData) + EXTRA_ALLOC + 1) );
240
241 STATISTICS_ADD(Length, nLen);
242
243 // allocate memory:
244 // 1) one extra character for '\0' termination
245 // 2) sizeof(wxStringData) for housekeeping info
246 wxStringData* pData = (wxStringData*)
247 malloc(sizeof(wxStringData) + (nLen + EXTRA_ALLOC + 1)*sizeof(wxChar));
248
249 if ( pData == NULL ) {
250 // allocation failures are handled by the caller
251 return FALSE;
252 }
253
254 pData->nRefs = 1;
255 pData->nDataLength = nLen;
256 pData->nAllocLength = nLen + EXTRA_ALLOC;
257 m_pchData = pData->data(); // data starts after wxStringData
258 m_pchData[nLen] = wxT('\0');
259 return TRUE;
260 }
261
262 // must be called before changing this string
263 bool wxStringBase::CopyBeforeWrite()
264 {
265 wxStringData* pData = GetStringData();
266
267 if ( pData->IsShared() ) {
268 pData->Unlock(); // memory not freed because shared
269 size_t nLen = pData->nDataLength;
270 if ( !AllocBuffer(nLen) ) {
271 // allocation failures are handled by the caller
272 return FALSE;
273 }
274 memcpy(m_pchData, pData->data(), nLen*sizeof(wxChar));
275 }
276
277 wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner
278
279 return TRUE;
280 }
281
282 // must be called before replacing contents of this string
283 bool wxStringBase::AllocBeforeWrite(size_t nLen)
284 {
285 wxASSERT( nLen != 0 ); // doesn't make any sense
286
287 // must not share string and must have enough space
288 wxStringData* pData = GetStringData();
289 if ( pData->IsShared() || pData->IsEmpty() ) {
290 // can't work with old buffer, get new one
291 pData->Unlock();
292 if ( !AllocBuffer(nLen) ) {
293 // allocation failures are handled by the caller
294 return FALSE;
295 }
296 }
297 else {
298 if ( nLen > pData->nAllocLength ) {
299 // realloc the buffer instead of calling malloc() again, this is more
300 // efficient
301 STATISTICS_ADD(Length, nLen);
302
303 nLen += EXTRA_ALLOC;
304
305 pData = (wxStringData*)
306 realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
307
308 if ( pData == NULL ) {
309 // allocation failures are handled by the caller
310 // keep previous data since reallocation failed
311 return FALSE;
312 }
313
314 pData->nAllocLength = nLen;
315 m_pchData = pData->data();
316 }
317
318 // now we have enough space, just update the string length
319 pData->nDataLength = nLen;
320 }
321
322 wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner
323
324 return TRUE;
325 }
326
327 wxStringBase& wxStringBase::append(size_t n, wxChar ch)
328 {
329 size_type len = length();
330
331 if ( !CopyBeforeWrite() || !Alloc(len + n) ) {
332 wxFAIL_MSG( _T("out of memory in wxStringBase::append") );
333 }
334 GetStringData()->nDataLength = len + n;
335 m_pchData[len + n] = '\0';
336 for ( size_t i = 0; i < n; ++i )
337 m_pchData[len + i] = ch;
338 return *this;
339 }
340
341 void wxStringBase::resize(size_t nSize, wxChar ch)
342 {
343 size_t len = length();
344
345 if ( nSize < len )
346 {
347 erase(begin() + nSize, end());
348 }
349 else if ( nSize > len )
350 {
351 append(nSize - len, ch);
352 }
353 //else: we have exactly the specified length, nothing to do
354 }
355
356 // allocate enough memory for nLen characters
357 bool wxStringBase::Alloc(size_t nLen)
358 {
359 wxStringData *pData = GetStringData();
360 if ( pData->nAllocLength <= nLen ) {
361 if ( pData->IsEmpty() ) {
362 nLen += EXTRA_ALLOC;
363
364 wxStringData* pData = (wxStringData*)
365 malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
366
367 if ( pData == NULL ) {
368 // allocation failure handled by caller
369 return FALSE;
370 }
371
372 pData->nRefs = 1;
373 pData->nDataLength = 0;
374 pData->nAllocLength = nLen;
375 m_pchData = pData->data(); // data starts after wxStringData
376 m_pchData[0u] = wxT('\0');
377 }
378 else if ( pData->IsShared() ) {
379 pData->Unlock(); // memory not freed because shared
380 size_t nOldLen = pData->nDataLength;
381 if ( !AllocBuffer(nLen) ) {
382 // allocation failure handled by caller
383 return FALSE;
384 }
385 memcpy(m_pchData, pData->data(), nOldLen*sizeof(wxChar));
386 }
387 else {
388 nLen += EXTRA_ALLOC;
389
390 pData = (wxStringData *)
391 realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
392
393 if ( pData == NULL ) {
394 // allocation failure handled by caller
395 // keep previous data since reallocation failed
396 return FALSE;
397 }
398
399 // it's not important if the pointer changed or not (the check for this
400 // is not faster than assigning to m_pchData in all cases)
401 pData->nAllocLength = nLen;
402 m_pchData = pData->data();
403 }
404 }
405 //else: we've already got enough
406 return TRUE;
407 }
408
409 wxStringBase::iterator wxStringBase::erase(iterator it)
410 {
411 size_type idx = it - begin();
412 erase(idx, 1);
413 return begin() + idx;
414 }
415
416 wxStringBase& wxStringBase::erase(size_t nStart, size_t nLen)
417 {
418 wxASSERT(nStart <= length());
419 size_t strLen = length() - nStart;
420 // delete nLen or up to the end of the string characters
421 nLen = strLen < nLen ? strLen : nLen;
422 wxString strTmp(c_str(), nStart);
423 strTmp.append(c_str() + nStart + nLen, length() - nStart - nLen);
424
425 swap(strTmp);
426 return *this;
427 }
428
429 wxStringBase& wxStringBase::insert(size_t nPos, const wxChar *sz, size_t n)
430 {
431 wxASSERT( nPos <= length() );
432
433 if ( n == npos ) n = wxStrlen(sz);
434 if ( n == 0 ) return *this;
435
436 if ( !CopyBeforeWrite() || !Alloc(length() + n) ) {
437 wxFAIL_MSG( _T("out of memory in wxStringBase::insert") );
438 }
439
440 memmove(m_pchData + nPos + n, m_pchData + nPos,
441 (length() - nPos) * sizeof(wxChar));
442 memcpy(m_pchData + nPos, sz, n * sizeof(wxChar));
443 GetStringData()->nDataLength = length() + n;
444 m_pchData[length()] = '\0';
445
446 return *this;
447 }
448
449 void wxStringBase::swap(wxStringBase& str)
450 {
451 wxChar* tmp = str.m_pchData;
452 str.m_pchData = m_pchData;
453 m_pchData = tmp;
454 }
455
456 size_t wxStringBase::find(const wxStringBase& str, size_t nStart) const
457 {
458 wxASSERT( str.GetStringData()->IsValid() );
459 wxASSERT( nStart <= length() );
460
461 const wxChar *p = wxStrstr(c_str() + nStart, str.c_str());
462
463 return p == NULL ? npos : p - c_str();
464 }
465
466 size_t wxStringBase::find(const wxChar* sz, size_t nStart, size_t n) const
467 {
468 return find(wxStringBase(sz, n), nStart);
469 }
470
471 size_t wxStringBase::find(wxChar ch, size_t nStart) const
472 {
473 wxASSERT( nStart <= length() );
474
475 const wxChar *p = wxStrchr(c_str() + nStart, ch);
476
477 return p == NULL ? npos : p - c_str();
478 }
479
480 size_t wxStringBase::rfind(const wxStringBase& str, size_t nStart) const
481 {
482 wxASSERT( str.GetStringData()->IsValid() );
483 wxASSERT( nStart == npos || nStart <= length() );
484
485 if ( length() >= str.length() )
486 {
487 // avoids a corner case later
488 if ( length() == 0 && str.length() == 0 )
489 return 0;
490
491 // "top" is the point where search starts from
492 size_t top = length() - str.length();
493
494 if ( nStart == npos )
495 nStart = length() - 1;
496 if ( nStart < top )
497 top = nStart;
498
499 const wxChar *cursor = c_str() + top;
500 do
501 {
502 if ( memcmp(cursor, str.c_str(),
503 str.length() * sizeof(wxChar)) == 0 )
504 {
505 return cursor - c_str();
506 }
507 } while ( cursor-- > c_str() );
508 }
509
510 return npos;
511 }
512
513 size_t wxStringBase::rfind(const wxChar* sz, size_t nStart, size_t n) const
514 {
515 return rfind(wxStringBase(sz, n), nStart);
516 }
517
518 size_t wxStringBase::rfind(wxChar ch, size_t nStart) const
519 {
520 if ( nStart == npos )
521 {
522 nStart = length();
523 }
524 else
525 {
526 wxASSERT( nStart <= length() );
527 }
528
529 const wxChar *actual;
530 for ( actual = c_str() + ( nStart == npos ? length() : nStart + 1 );
531 actual > c_str(); --actual )
532 {
533 if ( *(actual - 1) == ch )
534 return (actual - 1) - c_str();
535 }
536
537 return npos;
538 }
539
540 size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart) const
541 {
542 const wxChar *start = c_str() + nStart;
543 const wxChar *firstOf = wxStrpbrk(start, sz);
544 if ( firstOf )
545 return firstOf - c_str();
546 else
547 return npos;
548 }
549
550 size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart,
551 size_t n) const
552 {
553 return find_first_of(wxStringBase(sz, n), nStart);
554 }
555
556 size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart) const
557 {
558 if ( nStart == npos )
559 {
560 nStart = length() - 1;
561 }
562 else
563 {
564 wxASSERT_MSG( nStart <= length(),
565 _T("invalid index in find_last_of()") );
566 }
567
568 for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p )
569 {
570 if ( wxStrchr(sz, *p) )
571 return p - c_str();
572 }
573
574 return npos;
575 }
576
577 size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart,
578 size_t n) const
579 {
580 return find_last_of(wxStringBase(sz, n), nStart);
581 }
582
583 size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart) const
584 {
585 if ( nStart == npos )
586 {
587 nStart = length();
588 }
589 else
590 {
591 wxASSERT( nStart <= length() );
592 }
593
594 size_t nAccept = wxStrspn(c_str() + nStart, sz);
595 if ( nAccept >= length() - nStart )
596 return npos;
597 else
598 return nStart + nAccept;
599 }
600
601 size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart,
602 size_t n) const
603 {
604 return find_first_not_of(wxStringBase(sz, n), nStart);
605 }
606
607 size_t wxStringBase::find_first_not_of(wxChar ch, size_t nStart) const
608 {
609 wxASSERT( nStart <= length() );
610
611 for ( const wxChar *p = c_str() + nStart; *p; p++ )
612 {
613 if ( *p != ch )
614 return p - c_str();
615 }
616
617 return npos;
618 }
619
620 size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart) const
621 {
622 if ( nStart == npos )
623 {
624 nStart = length() - 1;
625 }
626 else
627 {
628 wxASSERT( nStart <= length() );
629 }
630
631 for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p )
632 {
633 if ( !wxStrchr(sz, *p) )
634 return p - c_str();
635 }
636
637 return npos;
638 }
639
640 size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart,
641 size_t n) const
642 {
643 return find_last_not_of(wxStringBase(sz, n), nStart);
644 }
645
646 size_t wxStringBase::find_last_not_of(wxChar ch, size_t nStart) const
647 {
648 if ( nStart == npos )
649 {
650 nStart = length() - 1;
651 }
652 else
653 {
654 wxASSERT( nStart <= length() );
655 }
656
657 for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p )
658 {
659 if ( *p != ch )
660 return p - c_str();
661 }
662
663 return npos;
664 }
665
666 wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen,
667 const wxChar *sz)
668 {
669 wxASSERT_MSG( nStart <= length(),
670 _T("index out of bounds in wxStringBase::replace") );
671 size_t strLen = length() - nStart;
672 nLen = strLen < nLen ? strLen : nLen;
673
674 wxStringBase strTmp;
675 strTmp.reserve(length()); // micro optimisation to avoid multiple mem allocs
676
677 if ( nStart != 0 )
678 strTmp.append(c_str(), nStart);
679 strTmp.append(sz);
680 strTmp.append(c_str() + nStart + nLen);
681
682 swap(strTmp);
683 return *this;
684 }
685
686 wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen,
687 size_t nCount, wxChar ch)
688 {
689 return replace(nStart, nLen, wxStringBase(ch, nCount).c_str());
690 }
691
692 wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen,
693 const wxStringBase& str,
694 size_t nStart2, size_t nLen2)
695 {
696 return replace(nStart, nLen, str.substr(nStart2, nLen2));
697 }
698
699 wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen,
700 const wxChar* sz, size_t nCount)
701 {
702 return replace(nStart, nLen, wxStringBase(sz, nCount).c_str());
703 }
704
705 wxStringBase wxStringBase::substr(size_t nStart, size_t nLen) const
706 {
707 if ( nLen == npos )
708 nLen = length() - nStart;
709 return wxStringBase(*this, nStart, nLen);
710 }
711
712 // assigns one string to another
713 wxStringBase& wxStringBase::operator=(const wxStringBase& stringSrc)
714 {
715 wxASSERT( stringSrc.GetStringData()->IsValid() );
716
717 // don't copy string over itself
718 if ( m_pchData != stringSrc.m_pchData ) {
719 if ( stringSrc.GetStringData()->IsEmpty() ) {
720 Reinit();
721 }
722 else {
723 // adjust references
724 GetStringData()->Unlock();
725 m_pchData = stringSrc.m_pchData;
726 GetStringData()->Lock();
727 }
728 }
729
730 return *this;
731 }
732
733 // assigns a single character
734 wxStringBase& wxStringBase::operator=(wxChar ch)
735 {
736 if ( !AssignCopy(1, &ch) ) {
737 wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(wxChar)") );
738 }
739 return *this;
740 }
741
742 // assigns C string
743 wxStringBase& wxStringBase::operator=(const wxChar *psz)
744 {
745 if ( !AssignCopy(wxStrlen(psz), psz) ) {
746 wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(const wxChar *)") );
747 }
748 return *this;
749 }
750
751 // helper function: does real copy
752 bool wxStringBase::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData)
753 {
754 if ( nSrcLen == 0 ) {
755 Reinit();
756 }
757 else {
758 if ( !AllocBeforeWrite(nSrcLen) ) {
759 // allocation failure handled by caller
760 return FALSE;
761 }
762 memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(wxChar));
763 GetStringData()->nDataLength = nSrcLen;
764 m_pchData[nSrcLen] = wxT('\0');
765 }
766 return TRUE;
767 }
768
769 // ---------------------------------------------------------------------------
770 // string concatenation
771 // ---------------------------------------------------------------------------
772
773 // add something to this string
774 bool wxStringBase::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData,
775 size_t nMaxLen)
776 {
777 STATISTICS_ADD(SummandLength, nSrcLen);
778
779 nSrcLen = nSrcLen < nMaxLen ? nSrcLen : nMaxLen;
780
781 // concatenating an empty string is a NOP
782 if ( nSrcLen > 0 ) {
783 wxStringData *pData = GetStringData();
784 size_t nLen = pData->nDataLength;
785 size_t nNewLen = nLen + nSrcLen;
786
787 // alloc new buffer if current is too small
788 if ( pData->IsShared() ) {
789 STATISTICS_ADD(ConcatHit, 0);
790
791 // we have to allocate another buffer
792 wxStringData* pOldData = GetStringData();
793 if ( !AllocBuffer(nNewLen) ) {
794 // allocation failure handled by caller
795 return FALSE;
796 }
797 memcpy(m_pchData, pOldData->data(), nLen*sizeof(wxChar));
798 pOldData->Unlock();
799 }
800 else if ( nNewLen > pData->nAllocLength ) {
801 STATISTICS_ADD(ConcatHit, 0);
802
803 reserve(nNewLen);
804 // we have to grow the buffer
805 if ( capacity() < nNewLen ) {
806 // allocation failure handled by caller
807 return FALSE;
808 }
809 }
810 else {
811 STATISTICS_ADD(ConcatHit, 1);
812
813 // the buffer is already big enough
814 }
815
816 // should be enough space
817 wxASSERT( nNewLen <= GetStringData()->nAllocLength );
818
819 // fast concatenation - all is done in our buffer
820 memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(wxChar));
821
822 m_pchData[nNewLen] = wxT('\0'); // put terminating '\0'
823 GetStringData()->nDataLength = nNewLen; // and fix the length
824 }
825 //else: the string to append was empty
826 return TRUE;
827 }
828
829 // ---------------------------------------------------------------------------
830 // simple sub-string extraction
831 // ---------------------------------------------------------------------------
832
833 // helper function: clone the data attached to this string
834 bool wxStringBase::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const
835 {
836 if ( nCopyLen == 0 ) {
837 dest.Init();
838 }
839 else {
840 if ( !dest.AllocBuffer(nCopyLen) ) {
841 // allocation failure handled by caller
842 return FALSE;
843 }
844 memcpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen*sizeof(wxChar));
845 }
846 return TRUE;
847 }
848
849 #endif // !wxUSE_STL
850
851 #if !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE)
852
853 #if !wxUSE_STL
854 #define STRINGCLASS wxStringBase
855 #else
856 #define STRINGCLASS wxString
857 #endif
858
859 static inline int wxDoCmp(const wxChar* s1, size_t l1,
860 const wxChar* s2, size_t l2)
861 {
862 if( l1 == l2 )
863 return wxStrncmp(s1, s2, l1);
864 else if( l1 < l2 )
865 {
866 int ret = wxStrncmp(s1, s2, l1);
867 return ret == 0 ? -1 : ret;
868 }
869 else if( l1 > l2 )
870 {
871 int ret = wxStrncmp(s1, s2, l2);
872 return ret == 0 ? +1 : ret;
873 }
874
875 wxFAIL; // must never get there
876 return 0; // quiet compilers
877 }
878
879 #if wxUSE_STL
880
881 int STRINGCLASS::compare(const wxStringBase& str) const
882 {
883 return ::wxDoCmp(data(), length(), str.data(), str.length());
884 }
885
886 #endif
887
888 int STRINGCLASS::compare(size_t nStart, size_t nLen,
889 const wxStringBase& str) const
890 {
891 wxASSERT(nStart <= length());
892 size_type strLen = length() - nStart;
893 nLen = strLen < nLen ? strLen : nLen;
894 return ::wxDoCmp(data() + nStart, nLen, str.data(), str.length());
895 }
896
897 int STRINGCLASS::compare(size_t nStart, size_t nLen,
898 const wxStringBase& str,
899 size_t nStart2, size_t nLen2) const
900 {
901 wxASSERT(nStart <= length());
902 wxASSERT(nStart2 <= str.length());
903 size_type strLen = length() - nStart,
904 strLen2 = str.length() - nStart2;
905 nLen = strLen < nLen ? strLen : nLen;
906 nLen2 = strLen2 < nLen2 ? strLen2 : nLen2;
907 return ::wxDoCmp(data() + nStart, nLen, str.data() + nStart2, nLen2);
908 }
909
910 #if wxUSE_STL
911
912 int STRINGCLASS::compare(const wxChar* sz) const
913 {
914 size_t nLen = wxStrlen(sz);
915 return ::wxDoCmp(data(), length(), sz, nLen);
916 }
917
918 #endif
919
920 int STRINGCLASS::compare(size_t nStart, size_t nLen,
921 const wxChar* sz, size_t nCount) const
922 {
923 wxASSERT(nStart <= length());
924 size_type strLen = length() - nStart;
925 nLen = strLen < nLen ? strLen : nLen;
926 if( nCount == npos )
927 nCount = wxStrlen(sz);
928
929 return ::wxDoCmp(data() + nStart, nLen, sz, nCount);
930 }
931
932 #undef STRINGCLASS
933
934 #endif // !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE)
935
936 // ===========================================================================
937 // wxString class core
938 // ===========================================================================
939
940 // ---------------------------------------------------------------------------
941 // construction
942 // ---------------------------------------------------------------------------
943
944 #if wxUSE_UNICODE
945
946 // from multibyte string
947 wxString::wxString(const char *psz, wxMBConv& conv, size_t nLength)
948 {
949 // first get the size of the buffer we need
950 size_t nLen;
951 if ( psz )
952 {
953 // calculate the needed size ourselves or use the provided one
954 nLen = nLength == npos ? conv.MB2WC(NULL, psz, 0) : nLength;
955 }
956 else
957 {
958 // nothing to convert
959 nLen = 0;
960 }
961
962 // anything to do?
963 if ( (nLen != 0) && (nLen != (size_t)-1) )
964 {
965 if ( !Alloc(nLen) )
966 {
967 wxFAIL_MSG( _T("out of memory in wxString::wxString") );
968 }
969 else
970 {
971 wxWCharBuffer buf(nLen + 1);
972 // MB2WC wants the buffer size, not the string length hence +1
973 nLen = conv.MB2WC(buf.data(), psz, nLen + 1);
974
975 if ( nLen != (size_t)-1 )
976 {
977 // initialized ok, set the real length as nLength specified by
978 // the caller could be greater than the real string length
979 assign(buf.data(), nLen);
980 return;
981 }
982 //else: the conversion failed -- leave the string empty (what else?)
983 }
984 }
985 }
986
987 #else // ANSI
988
989 #if wxUSE_WCHAR_T
990 // from wide string
991 wxString::wxString(const wchar_t *pwz, wxMBConv& conv, size_t nLength)
992 {
993 // first get the size of the buffer we need
994 size_t nLen;
995 if ( pwz )
996 {
997 // calculate the needed size ourselves or use the provided one
998 nLen = nLength == npos ? conv.WC2MB(NULL, pwz, 0) : nLength;
999 }
1000 else
1001 {
1002 // nothing to convert
1003 nLen = 0;
1004 }
1005
1006 // anything to do?
1007 if ( (nLen != 0) && (nLen != (size_t)-1) )
1008 {
1009 if ( !Alloc(nLen) )
1010 {
1011 wxFAIL_MSG( _T("out of memory in wxString::wxString") );
1012 }
1013 else
1014 {
1015 wxCharBuffer buf(nLen);
1016 // WC2MB wants the buffer size, not the string length
1017 if ( conv.WC2MB(buf.data(), pwz, nLen + 1) != (size_t)-1 )
1018 {
1019 // initialized ok
1020 assign(buf.data(), nLen);
1021 return;
1022 }
1023 //else: the conversion failed -- leave the string empty (what else?)
1024 }
1025 }
1026
1027 // leave empty
1028 }
1029 #endif // wxUSE_WCHAR_T
1030
1031 #endif // Unicode/ANSI
1032
1033 // shrink to minimal size (releasing extra memory)
1034 bool wxString::Shrink()
1035 {
1036 wxString tmp(begin(), end());
1037 swap(tmp);
1038 return tmp.length() == length();
1039 }
1040
1041 #if !wxUSE_STL
1042 // get the pointer to writable buffer of (at least) nLen bytes
1043 wxChar *wxString::GetWriteBuf(size_t nLen)
1044 {
1045 if ( !AllocBeforeWrite(nLen) ) {
1046 // allocation failure handled by caller
1047 return NULL;
1048 }
1049
1050 wxASSERT( GetStringData()->nRefs == 1 );
1051 GetStringData()->Validate(FALSE);
1052
1053 return m_pchData;
1054 }
1055
1056 // put string back in a reasonable state after GetWriteBuf
1057 void wxString::UngetWriteBuf()
1058 {
1059 GetStringData()->nDataLength = wxStrlen(m_pchData);
1060 GetStringData()->Validate(TRUE);
1061 }
1062
1063 void wxString::UngetWriteBuf(size_t nLen)
1064 {
1065 GetStringData()->nDataLength = nLen;
1066 GetStringData()->Validate(TRUE);
1067 }
1068 #endif
1069
1070 // ---------------------------------------------------------------------------
1071 // data access
1072 // ---------------------------------------------------------------------------
1073
1074 // all functions are inline in string.h
1075
1076 // ---------------------------------------------------------------------------
1077 // assignment operators
1078 // ---------------------------------------------------------------------------
1079
1080 #if !wxUSE_UNICODE
1081
1082 // same as 'signed char' variant
1083 wxString& wxString::operator=(const unsigned char* psz)
1084 {
1085 *this = (const char *)psz;
1086 return *this;
1087 }
1088
1089 #if wxUSE_WCHAR_T
1090 wxString& wxString::operator=(const wchar_t *pwz)
1091 {
1092 wxString str(pwz);
1093 swap(str);
1094 return *this;
1095 }
1096 #endif
1097
1098 #endif
1099
1100 /*
1101 * concatenation functions come in 5 flavours:
1102 * string + string
1103 * char + string and string + char
1104 * C str + string and string + C str
1105 */
1106
1107 wxString operator+(const wxString& str1, const wxString& str2)
1108 {
1109 #if !wxUSE_STL
1110 wxASSERT( str1.GetStringData()->IsValid() );
1111 wxASSERT( str2.GetStringData()->IsValid() );
1112 #endif
1113
1114 wxString s = str1;
1115 s += str2;
1116
1117 return s;
1118 }
1119
1120 wxString operator+(const wxString& str, wxChar ch)
1121 {
1122 #if !wxUSE_STL
1123 wxASSERT( str.GetStringData()->IsValid() );
1124 #endif
1125
1126 wxString s = str;
1127 s += ch;
1128
1129 return s;
1130 }
1131
1132 wxString operator+(wxChar ch, const wxString& str)
1133 {
1134 #if !wxUSE_STL
1135 wxASSERT( str.GetStringData()->IsValid() );
1136 #endif
1137
1138 wxString s = ch;
1139 s += str;
1140
1141 return s;
1142 }
1143
1144 wxString operator+(const wxString& str, const wxChar *psz)
1145 {
1146 #if !wxUSE_STL
1147 wxASSERT( str.GetStringData()->IsValid() );
1148 #endif
1149
1150 wxString s;
1151 if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) {
1152 wxFAIL_MSG( _T("out of memory in wxString::operator+") );
1153 }
1154 s = str;
1155 s += psz;
1156
1157 return s;
1158 }
1159
1160 wxString operator+(const wxChar *psz, const wxString& str)
1161 {
1162 #if !wxUSE_STL
1163 wxASSERT( str.GetStringData()->IsValid() );
1164 #endif
1165
1166 wxString s;
1167 if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) {
1168 wxFAIL_MSG( _T("out of memory in wxString::operator+") );
1169 }
1170 s = psz;
1171 s += str;
1172
1173 return s;
1174 }
1175
1176 // ===========================================================================
1177 // other common string functions
1178 // ===========================================================================
1179
1180 #if wxUSE_UNICODE
1181
1182 wxString wxString::FromAscii(const char *ascii)
1183 {
1184 if (!ascii)
1185 return wxEmptyString;
1186
1187 size_t len = strlen( ascii );
1188 wxString res;
1189
1190 if ( len )
1191 {
1192 wxStringBuffer buf(res, len);
1193
1194 wchar_t *dest = buf;
1195
1196 for ( ;; )
1197 {
1198 if ( (*dest++ = (wchar_t)(unsigned char)*ascii++) == L'\0' )
1199 break;
1200 }
1201 }
1202
1203 return res;
1204 }
1205
1206 wxString wxString::FromAscii(const char ascii)
1207 {
1208 // What do we do with '\0' ?
1209
1210 wxString res;
1211 res += (wchar_t)(unsigned char) ascii;
1212
1213 return res;
1214 }
1215
1216 const wxCharBuffer wxString::ToAscii() const
1217 {
1218 // this will allocate enough space for the terminating NUL too
1219 wxCharBuffer buffer(length());
1220
1221 signed char *dest = (signed char *)buffer.data();
1222
1223 const wchar_t *pwc = c_str();
1224 for ( ;; )
1225 {
1226 *dest++ = *pwc > SCHAR_MAX ? '_' : *pwc;
1227
1228 // the output string can't have embedded NULs anyhow, so we can safely
1229 // stop at first of them even if we do have any
1230 if ( !*pwc++ )
1231 break;
1232 }
1233
1234 return buffer;
1235 }
1236
1237 #endif // Unicode
1238
1239 // extract string of length nCount starting at nFirst
1240 wxString wxString::Mid(size_t nFirst, size_t nCount) const
1241 {
1242 size_t nLen = length();
1243
1244 // default value of nCount is npos and means "till the end"
1245 if ( nCount == npos )
1246 {
1247 nCount = nLen - nFirst;
1248 }
1249
1250 // out-of-bounds requests return sensible things
1251 if ( nFirst + nCount > nLen )
1252 {
1253 nCount = nLen - nFirst;
1254 }
1255
1256 if ( nFirst > nLen )
1257 {
1258 // AllocCopy() will return empty string
1259 nCount = 0;
1260 }
1261
1262 wxString dest(*this, nFirst, nCount);
1263 if ( dest.length() != nCount ) {
1264 wxFAIL_MSG( _T("out of memory in wxString::Mid") );
1265 }
1266
1267 return dest;
1268 }
1269
1270 // check that the string starts with prefix and return the rest of the string
1271 // in the provided pointer if it is not NULL, otherwise return FALSE
1272 bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const
1273 {
1274 wxASSERT_MSG( prefix, _T("invalid parameter in wxString::StartsWith") );
1275
1276 // first check if the beginning of the string matches the prefix: note
1277 // that we don't have to check that we don't run out of this string as
1278 // when we reach the terminating NUL, either prefix string ends too (and
1279 // then it's ok) or we break out of the loop because there is no match
1280 const wxChar *p = c_str();
1281 while ( *prefix )
1282 {
1283 if ( *prefix++ != *p++ )
1284 {
1285 // no match
1286 return FALSE;
1287 }
1288 }
1289
1290 if ( rest )
1291 {
1292 // put the rest of the string into provided pointer
1293 *rest = p;
1294 }
1295
1296 return TRUE;
1297 }
1298
1299 // extract nCount last (rightmost) characters
1300 wxString wxString::Right(size_t nCount) const
1301 {
1302 if ( nCount > length() )
1303 nCount = length();
1304
1305 wxString dest(*this, length() - nCount, nCount);
1306 if ( dest.length() != nCount ) {
1307 wxFAIL_MSG( _T("out of memory in wxString::Right") );
1308 }
1309 return dest;
1310 }
1311
1312 // get all characters after the last occurence of ch
1313 // (returns the whole string if ch not found)
1314 wxString wxString::AfterLast(wxChar ch) const
1315 {
1316 wxString str;
1317 int iPos = Find(ch, TRUE);
1318 if ( iPos == wxNOT_FOUND )
1319 str = *this;
1320 else
1321 str = c_str() + iPos + 1;
1322
1323 return str;
1324 }
1325
1326 // extract nCount first (leftmost) characters
1327 wxString wxString::Left(size_t nCount) const
1328 {
1329 if ( nCount > length() )
1330 nCount = length();
1331
1332 wxString dest(*this, 0, nCount);
1333 if ( dest.length() != nCount ) {
1334 wxFAIL_MSG( _T("out of memory in wxString::Left") );
1335 }
1336 return dest;
1337 }
1338
1339 // get all characters before the first occurence of ch
1340 // (returns the whole string if ch not found)
1341 wxString wxString::BeforeFirst(wxChar ch) const
1342 {
1343 int iPos = Find(ch);
1344 if ( iPos == wxNOT_FOUND ) iPos = length();
1345 return wxString(*this, 0, iPos);
1346 }
1347
1348 /// get all characters before the last occurence of ch
1349 /// (returns empty string if ch not found)
1350 wxString wxString::BeforeLast(wxChar ch) const
1351 {
1352 wxString str;
1353 int iPos = Find(ch, TRUE);
1354 if ( iPos != wxNOT_FOUND && iPos != 0 )
1355 str = wxString(c_str(), iPos);
1356
1357 return str;
1358 }
1359
1360 /// get all characters after the first occurence of ch
1361 /// (returns empty string if ch not found)
1362 wxString wxString::AfterFirst(wxChar ch) const
1363 {
1364 wxString str;
1365 int iPos = Find(ch);
1366 if ( iPos != wxNOT_FOUND )
1367 str = c_str() + iPos + 1;
1368
1369 return str;
1370 }
1371
1372 // replace first (or all) occurences of some substring with another one
1373 size_t
1374 wxString::Replace(const wxChar *szOld, const wxChar *szNew, bool bReplaceAll)
1375 {
1376 // if we tried to replace an empty string we'd enter an infinite loop below
1377 wxCHECK_MSG( szOld && *szOld && szNew, 0,
1378 _T("wxString::Replace(): invalid parameter") );
1379
1380 size_t uiCount = 0; // count of replacements made
1381
1382 size_t uiOldLen = wxStrlen(szOld);
1383
1384 wxString strTemp;
1385 const wxChar *pCurrent = c_str();
1386 const wxChar *pSubstr;
1387 while ( *pCurrent != wxT('\0') ) {
1388 pSubstr = wxStrstr(pCurrent, szOld);
1389 if ( pSubstr == NULL ) {
1390 // strTemp is unused if no replacements were made, so avoid the copy
1391 if ( uiCount == 0 )
1392 return 0;
1393
1394 strTemp += pCurrent; // copy the rest
1395 break; // exit the loop
1396 }
1397 else {
1398 // take chars before match
1399 size_type len = strTemp.length();
1400 strTemp.append(pCurrent, pSubstr - pCurrent);
1401 if ( strTemp.length() != (size_t)(len + pSubstr - pCurrent) ) {
1402 wxFAIL_MSG( _T("out of memory in wxString::Replace") );
1403 return 0;
1404 }
1405 strTemp += szNew;
1406 pCurrent = pSubstr + uiOldLen; // restart after match
1407
1408 uiCount++;
1409
1410 // stop now?
1411 if ( !bReplaceAll ) {
1412 strTemp += pCurrent; // copy the rest
1413 break; // exit the loop
1414 }
1415 }
1416 }
1417
1418 // only done if there were replacements, otherwise would have returned above
1419 swap(strTemp);
1420
1421 return uiCount;
1422 }
1423
1424 bool wxString::IsAscii() const
1425 {
1426 const wxChar *s = (const wxChar*) *this;
1427 while(*s){
1428 if(!isascii(*s)) return(FALSE);
1429 s++;
1430 }
1431 return(TRUE);
1432 }
1433
1434 bool wxString::IsWord() const
1435 {
1436 const wxChar *s = (const wxChar*) *this;
1437 while(*s){
1438 if(!wxIsalpha(*s)) return(FALSE);
1439 s++;
1440 }
1441 return(TRUE);
1442 }
1443
1444 bool wxString::IsNumber() const
1445 {
1446 const wxChar *s = (const wxChar*) *this;
1447 if (wxStrlen(s))
1448 if ((s[0] == '-') || (s[0] == '+')) s++;
1449 while(*s){
1450 if(!wxIsdigit(*s)) return(FALSE);
1451 s++;
1452 }
1453 return(TRUE);
1454 }
1455
1456 wxString wxString::Strip(stripType w) const
1457 {
1458 wxString s = *this;
1459 if ( w & leading ) s.Trim(FALSE);
1460 if ( w & trailing ) s.Trim(TRUE);
1461 return s;
1462 }
1463
1464 // ---------------------------------------------------------------------------
1465 // case conversion
1466 // ---------------------------------------------------------------------------
1467
1468 wxString& wxString::MakeUpper()
1469 {
1470 for ( iterator it = begin(), en = end(); it != en; ++it )
1471 *it = (wxChar)wxToupper(*it);
1472
1473 return *this;
1474 }
1475
1476 wxString& wxString::MakeLower()
1477 {
1478 for ( iterator it = begin(), en = end(); it != en; ++it )
1479 *it = (wxChar)wxTolower(*it);
1480
1481 return *this;
1482 }
1483
1484 // ---------------------------------------------------------------------------
1485 // trimming and padding
1486 // ---------------------------------------------------------------------------
1487
1488 // some compilers (VC++ 6.0 not to name them) return TRUE for a call to
1489 // isspace('ê') in the C locale which seems to be broken to me, but we have to
1490 // live with this by checking that the character is a 7 bit one - even if this
1491 // may fail to detect some spaces (I don't know if Unicode doesn't have
1492 // space-like symbols somewhere except in the first 128 chars), it is arguably
1493 // still better than trimming away accented letters
1494 inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); }
1495
1496 // trims spaces (in the sense of isspace) from left or right side
1497 wxString& wxString::Trim(bool bFromRight)
1498 {
1499 // first check if we're going to modify the string at all
1500 if ( !IsEmpty() &&
1501 (
1502 (bFromRight && wxSafeIsspace(GetChar(Len() - 1))) ||
1503 (!bFromRight && wxSafeIsspace(GetChar(0u)))
1504 )
1505 )
1506 {
1507 if ( bFromRight )
1508 {
1509 // find last non-space character
1510 iterator psz = begin() + length() - 1;
1511 while ( wxSafeIsspace(*psz) && (psz >= begin()) )
1512 psz--;
1513
1514 // truncate at trailing space start
1515 *++psz = wxT('\0');
1516 erase(psz, end());
1517 }
1518 else
1519 {
1520 // find first non-space character
1521 iterator psz = begin();
1522 while ( wxSafeIsspace(*psz) )
1523 psz++;
1524
1525 // fix up data and length
1526 erase(begin(), psz);
1527 }
1528 }
1529
1530 return *this;
1531 }
1532
1533 // adds nCount characters chPad to the string from either side
1534 wxString& wxString::Pad(size_t nCount, wxChar chPad, bool bFromRight)
1535 {
1536 wxString s(chPad, nCount);
1537
1538 if ( bFromRight )
1539 *this += s;
1540 else
1541 {
1542 s += *this;
1543 swap(s);
1544 }
1545
1546 return *this;
1547 }
1548
1549 // truncate the string
1550 wxString& wxString::Truncate(size_t uiLen)
1551 {
1552 if ( uiLen < Len() ) {
1553 erase(begin() + uiLen, end());
1554 }
1555 //else: nothing to do, string is already short enough
1556
1557 return *this;
1558 }
1559
1560 // ---------------------------------------------------------------------------
1561 // finding (return wxNOT_FOUND if not found and index otherwise)
1562 // ---------------------------------------------------------------------------
1563
1564 // find a character
1565 int wxString::Find(wxChar ch, bool bFromEnd) const
1566 {
1567 size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch);
1568
1569 return (idx == npos) ? wxNOT_FOUND : (int)idx;
1570 }
1571
1572 // find a sub-string (like strstr)
1573 int wxString::Find(const wxChar *pszSub) const
1574 {
1575 size_type idx = find(pszSub);
1576
1577 return (idx == npos) ? wxNOT_FOUND : (int)idx;
1578 }
1579
1580 // ----------------------------------------------------------------------------
1581 // conversion to numbers
1582 // ----------------------------------------------------------------------------
1583
1584 bool wxString::ToLong(long *val, int base) const
1585 {
1586 wxCHECK_MSG( val, FALSE, _T("NULL pointer in wxString::ToLong") );
1587 wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
1588
1589 const wxChar *start = c_str();
1590 wxChar *end;
1591 *val = wxStrtol(start, &end, base);
1592
1593 // return TRUE only if scan was stopped by the terminating NUL and if the
1594 // string was not empty to start with
1595 return !*end && (end != start);
1596 }
1597
1598 bool wxString::ToULong(unsigned long *val, int base) const
1599 {
1600 wxCHECK_MSG( val, FALSE, _T("NULL pointer in wxString::ToULong") );
1601 wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
1602
1603 const wxChar *start = c_str();
1604 wxChar *end;
1605 *val = wxStrtoul(start, &end, base);
1606
1607 // return TRUE only if scan was stopped by the terminating NUL and if the
1608 // string was not empty to start with
1609 return !*end && (end != start);
1610 }
1611
1612 bool wxString::ToDouble(double *val) const
1613 {
1614 wxCHECK_MSG( val, FALSE, _T("NULL pointer in wxString::ToDouble") );
1615
1616 const wxChar *start = c_str();
1617 wxChar *end;
1618 *val = wxStrtod(start, &end);
1619
1620 // return TRUE only if scan was stopped by the terminating NUL and if the
1621 // string was not empty to start with
1622 return !*end && (end != start);
1623 }
1624
1625 // ---------------------------------------------------------------------------
1626 // formatted output
1627 // ---------------------------------------------------------------------------
1628
1629 /* static */
1630 wxString wxString::Format(const wxChar *pszFormat, ...)
1631 {
1632 va_list argptr;
1633 va_start(argptr, pszFormat);
1634
1635 wxString s;
1636 s.PrintfV(pszFormat, argptr);
1637
1638 va_end(argptr);
1639
1640 return s;
1641 }
1642
1643 /* static */
1644 wxString wxString::FormatV(const wxChar *pszFormat, va_list argptr)
1645 {
1646 wxString s;
1647 s.PrintfV(pszFormat, argptr);
1648 return s;
1649 }
1650
1651 int wxString::Printf(const wxChar *pszFormat, ...)
1652 {
1653 va_list argptr;
1654 va_start(argptr, pszFormat);
1655
1656 int iLen = PrintfV(pszFormat, argptr);
1657
1658 va_end(argptr);
1659
1660 return iLen;
1661 }
1662
1663 int wxString::PrintfV(const wxChar* pszFormat, va_list argptr)
1664 {
1665 int size = 1024;
1666 int len;
1667
1668 for ( ;; )
1669 {
1670 {
1671 wxStringBuffer tmp(*this, size + 1);
1672 wxChar* buf = tmp;
1673
1674 if ( !buf )
1675 {
1676 // out of memory
1677 return -1;
1678 }
1679
1680 len = wxVsnprintf(buf, size, pszFormat, argptr);
1681
1682 // some implementations of vsnprintf() don't NUL terminate
1683 // the string if there is not enough space for it so
1684 // always do it manually
1685 buf[size] = _T('\0');
1686 }
1687
1688 // vsnprintf() may return either -1 (traditional Unix behaviour) or the
1689 // total number of characters which would have been written if the
1690 // buffer were large enough
1691 if ( len >= 0 && len <= size )
1692 {
1693 // ok, there was enough space
1694 break;
1695 }
1696
1697 // still not enough, double it again
1698 size *= 2;
1699 }
1700
1701 // we could have overshot
1702 Shrink();
1703
1704 return Len();
1705 }
1706
1707 // ----------------------------------------------------------------------------
1708 // misc other operations
1709 // ----------------------------------------------------------------------------
1710
1711 // returns TRUE if the string matches the pattern which may contain '*' and
1712 // '?' metacharacters (as usual, '?' matches any character and '*' any number
1713 // of them)
1714 bool wxString::Matches(const wxChar *pszMask) const
1715 {
1716 // I disable this code as it doesn't seem to be faster (in fact, it seems
1717 // to be much slower) than the old, hand-written code below and using it
1718 // here requires always linking with libregex even if the user code doesn't
1719 // use it
1720 #if 0 // wxUSE_REGEX
1721 // first translate the shell-like mask into a regex
1722 wxString pattern;
1723 pattern.reserve(wxStrlen(pszMask));
1724
1725 pattern += _T('^');
1726 while ( *pszMask )
1727 {
1728 switch ( *pszMask )
1729 {
1730 case _T('?'):
1731 pattern += _T('.');
1732 break;
1733
1734 case _T('*'):
1735 pattern += _T(".*");
1736 break;
1737
1738 case _T('^'):
1739 case _T('.'):
1740 case _T('$'):
1741 case _T('('):
1742 case _T(')'):
1743 case _T('|'):
1744 case _T('+'):
1745 case _T('\\'):
1746 // these characters are special in a RE, quote them
1747 // (however note that we don't quote '[' and ']' to allow
1748 // using them for Unix shell like matching)
1749 pattern += _T('\\');
1750 // fall through
1751
1752 default:
1753 pattern += *pszMask;
1754 }
1755
1756 pszMask++;
1757 }
1758 pattern += _T('$');
1759
1760 // and now use it
1761 return wxRegEx(pattern, wxRE_NOSUB | wxRE_EXTENDED).Matches(c_str());
1762 #else // !wxUSE_REGEX
1763 // TODO: this is, of course, awfully inefficient...
1764
1765 // the char currently being checked
1766 const wxChar *pszTxt = c_str();
1767
1768 // the last location where '*' matched
1769 const wxChar *pszLastStarInText = NULL;
1770 const wxChar *pszLastStarInMask = NULL;
1771
1772 match:
1773 for ( ; *pszMask != wxT('\0'); pszMask++, pszTxt++ ) {
1774 switch ( *pszMask ) {
1775 case wxT('?'):
1776 if ( *pszTxt == wxT('\0') )
1777 return FALSE;
1778
1779 // pszTxt and pszMask will be incremented in the loop statement
1780
1781 break;
1782
1783 case wxT('*'):
1784 {
1785 // remember where we started to be able to backtrack later
1786 pszLastStarInText = pszTxt;
1787 pszLastStarInMask = pszMask;
1788
1789 // ignore special chars immediately following this one
1790 // (should this be an error?)
1791 while ( *pszMask == wxT('*') || *pszMask == wxT('?') )
1792 pszMask++;
1793
1794 // if there is nothing more, match
1795 if ( *pszMask == wxT('\0') )
1796 return TRUE;
1797
1798 // are there any other metacharacters in the mask?
1799 size_t uiLenMask;
1800 const wxChar *pEndMask = wxStrpbrk(pszMask, wxT("*?"));
1801
1802 if ( pEndMask != NULL ) {
1803 // we have to match the string between two metachars
1804 uiLenMask = pEndMask - pszMask;
1805 }
1806 else {
1807 // we have to match the remainder of the string
1808 uiLenMask = wxStrlen(pszMask);
1809 }
1810
1811 wxString strToMatch(pszMask, uiLenMask);
1812 const wxChar* pMatch = wxStrstr(pszTxt, strToMatch);
1813 if ( pMatch == NULL )
1814 return FALSE;
1815
1816 // -1 to compensate "++" in the loop
1817 pszTxt = pMatch + uiLenMask - 1;
1818 pszMask += uiLenMask - 1;
1819 }
1820 break;
1821
1822 default:
1823 if ( *pszMask != *pszTxt )
1824 return FALSE;
1825 break;
1826 }
1827 }
1828
1829 // match only if nothing left
1830 if ( *pszTxt == wxT('\0') )
1831 return TRUE;
1832
1833 // if we failed to match, backtrack if we can
1834 if ( pszLastStarInText ) {
1835 pszTxt = pszLastStarInText + 1;
1836 pszMask = pszLastStarInMask;
1837
1838 pszLastStarInText = NULL;
1839
1840 // don't bother resetting pszLastStarInMask, it's unnecessary
1841
1842 goto match;
1843 }
1844
1845 return FALSE;
1846 #endif // wxUSE_REGEX/!wxUSE_REGEX
1847 }
1848
1849 // Count the number of chars
1850 int wxString::Freq(wxChar ch) const
1851 {
1852 int count = 0;
1853 int len = Len();
1854 for (int i = 0; i < len; i++)
1855 {
1856 if (GetChar(i) == ch)
1857 count ++;
1858 }
1859 return count;
1860 }
1861
1862 // convert to upper case, return the copy of the string
1863 wxString wxString::Upper() const
1864 { wxString s(*this); return s.MakeUpper(); }
1865
1866 // convert to lower case, return the copy of the string
1867 wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
1868
1869 int wxString::sprintf(const wxChar *pszFormat, ...)
1870 {
1871 va_list argptr;
1872 va_start(argptr, pszFormat);
1873 int iLen = PrintfV(pszFormat, argptr);
1874 va_end(argptr);
1875 return iLen;
1876 }
1877
1878 // ============================================================================
1879 // ArrayString
1880 // ============================================================================
1881
1882 #include "wx/arrstr.h"
1883
1884 #if !wxUSE_STL
1885
1886 // size increment = min(50% of current size, ARRAY_MAXSIZE_INCREMENT)
1887 #define ARRAY_MAXSIZE_INCREMENT 4096
1888
1889 #ifndef ARRAY_DEFAULT_INITIAL_SIZE // also defined in dynarray.h
1890 #define ARRAY_DEFAULT_INITIAL_SIZE (16)
1891 #endif
1892
1893 #define STRING(p) ((wxString *)(&(p)))
1894
1895 // ctor
1896 void wxArrayString::Init(bool autoSort)
1897 {
1898 m_nSize =
1899 m_nCount = 0;
1900 m_pItems = (wxChar **) NULL;
1901 m_autoSort = autoSort;
1902 }
1903
1904 // copy ctor
1905 wxArrayString::wxArrayString(const wxArrayString& src)
1906 {
1907 Init(src.m_autoSort);
1908
1909 *this = src;
1910 }
1911
1912 // assignment operator
1913 wxArrayString& wxArrayString::operator=(const wxArrayString& src)
1914 {
1915 if ( m_nSize > 0 )
1916 Clear();
1917
1918 Copy(src);
1919
1920 m_autoSort = src.m_autoSort;
1921
1922 return *this;
1923 }
1924
1925 void wxArrayString::Copy(const wxArrayString& src)
1926 {
1927 if ( src.m_nCount > ARRAY_DEFAULT_INITIAL_SIZE )
1928 Alloc(src.m_nCount);
1929
1930 for ( size_t n = 0; n < src.m_nCount; n++ )
1931 Add(src[n]);
1932 }
1933
1934 // grow the array
1935 void wxArrayString::Grow(size_t nIncrement)
1936 {
1937 // only do it if no more place
1938 if ( (m_nSize - m_nCount) < nIncrement ) {
1939 // if ARRAY_DEFAULT_INITIAL_SIZE were set to 0, the initially empty would
1940 // be never resized!
1941 #if ARRAY_DEFAULT_INITIAL_SIZE == 0
1942 #error "ARRAY_DEFAULT_INITIAL_SIZE must be > 0!"
1943 #endif
1944
1945 if ( m_nSize == 0 ) {
1946 // was empty, alloc some memory
1947 m_nSize = ARRAY_DEFAULT_INITIAL_SIZE;
1948 if (m_nSize < nIncrement)
1949 m_nSize = nIncrement;
1950 m_pItems = new wxChar *[m_nSize];
1951 }
1952 else {
1953 // otherwise when it's called for the first time, nIncrement would be 0
1954 // and the array would never be expanded
1955 // add 50% but not too much
1956 size_t ndefIncrement = m_nSize < ARRAY_DEFAULT_INITIAL_SIZE
1957 ? ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1;
1958 if ( ndefIncrement > ARRAY_MAXSIZE_INCREMENT )
1959 ndefIncrement = ARRAY_MAXSIZE_INCREMENT;
1960 if ( nIncrement < ndefIncrement )
1961 nIncrement = ndefIncrement;
1962 m_nSize += nIncrement;
1963 wxChar **pNew = new wxChar *[m_nSize];
1964
1965 // copy data to new location
1966 memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *));
1967
1968 // delete old memory (but do not release the strings!)
1969 wxDELETEA(m_pItems);
1970
1971 m_pItems = pNew;
1972 }
1973 }
1974 }
1975
1976 void wxArrayString::Free()
1977 {
1978 for ( size_t n = 0; n < m_nCount; n++ ) {
1979 STRING(m_pItems[n])->GetStringData()->Unlock();
1980 }
1981 }
1982
1983 // deletes all the strings from the list
1984 void wxArrayString::Empty()
1985 {
1986 Free();
1987
1988 m_nCount = 0;
1989 }
1990
1991 // as Empty, but also frees memory
1992 void wxArrayString::Clear()
1993 {
1994 Free();
1995
1996 m_nSize =
1997 m_nCount = 0;
1998
1999 wxDELETEA(m_pItems);
2000 }
2001
2002 // dtor
2003 wxArrayString::~wxArrayString()
2004 {
2005 Free();
2006
2007 wxDELETEA(m_pItems);
2008 }
2009
2010 void wxArrayString::reserve(size_t nSize)
2011 {
2012 Alloc(nSize);
2013 }
2014
2015 // pre-allocates memory (frees the previous data!)
2016 void wxArrayString::Alloc(size_t nSize)
2017 {
2018 // only if old buffer was not big enough
2019 if ( nSize > m_nSize ) {
2020 Free();
2021 wxDELETEA(m_pItems);
2022 m_pItems = new wxChar *[nSize];
2023 m_nSize = nSize;
2024 }
2025
2026 m_nCount = 0;
2027 }
2028
2029 // minimizes the memory usage by freeing unused memory
2030 void wxArrayString::Shrink()
2031 {
2032 // only do it if we have some memory to free
2033 if( m_nCount < m_nSize ) {
2034 // allocates exactly as much memory as we need
2035 wxChar **pNew = new wxChar *[m_nCount];
2036
2037 // copy data to new location
2038 memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *));
2039 delete [] m_pItems;
2040 m_pItems = pNew;
2041 }
2042 }
2043
2044 #if WXWIN_COMPATIBILITY_2_4
2045
2046 // return a wxString[] as required for some control ctors.
2047 wxString* wxArrayString::GetStringArray() const
2048 {
2049 wxString *array = 0;
2050
2051 if( m_nCount > 0 )
2052 {
2053 array = new wxString[m_nCount];
2054 for( size_t i = 0; i < m_nCount; i++ )
2055 array[i] = m_pItems[i];
2056 }
2057
2058 return array;
2059 }
2060
2061 #endif // WXWIN_COMPATIBILITY_2_4
2062
2063 // searches the array for an item (forward or backwards)
2064 int wxArrayString::Index(const wxChar *sz, bool bCase, bool bFromEnd) const
2065 {
2066 if ( m_autoSort ) {
2067 // use binary search in the sorted array
2068 wxASSERT_MSG( bCase && !bFromEnd,
2069 wxT("search parameters ignored for auto sorted array") );
2070
2071 size_t i,
2072 lo = 0,
2073 hi = m_nCount;
2074 int res;
2075 while ( lo < hi ) {
2076 i = (lo + hi)/2;
2077
2078 res = wxStrcmp(sz, m_pItems[i]);
2079 if ( res < 0 )
2080 hi = i;
2081 else if ( res > 0 )
2082 lo = i + 1;
2083 else
2084 return i;
2085 }
2086
2087 return wxNOT_FOUND;
2088 }
2089 else {
2090 // use linear search in unsorted array
2091 if ( bFromEnd ) {
2092 if ( m_nCount > 0 ) {
2093 size_t ui = m_nCount;
2094 do {
2095 if ( STRING(m_pItems[--ui])->IsSameAs(sz, bCase) )
2096 return ui;
2097 }
2098 while ( ui != 0 );
2099 }
2100 }
2101 else {
2102 for( size_t ui = 0; ui < m_nCount; ui++ ) {
2103 if( STRING(m_pItems[ui])->IsSameAs(sz, bCase) )
2104 return ui;
2105 }
2106 }
2107 }
2108
2109 return wxNOT_FOUND;
2110 }
2111
2112 // add item at the end
2113 size_t wxArrayString::Add(const wxString& str, size_t nInsert)
2114 {
2115 if ( m_autoSort ) {
2116 // insert the string at the correct position to keep the array sorted
2117 size_t i,
2118 lo = 0,
2119 hi = m_nCount;
2120 int res;
2121 while ( lo < hi ) {
2122 i = (lo + hi)/2;
2123
2124 res = wxStrcmp(str, m_pItems[i]);
2125 if ( res < 0 )
2126 hi = i;
2127 else if ( res > 0 )
2128 lo = i + 1;
2129 else {
2130 lo = hi = i;
2131 break;
2132 }
2133 }
2134
2135 wxASSERT_MSG( lo == hi, wxT("binary search broken") );
2136
2137 Insert(str, lo, nInsert);
2138
2139 return (size_t)lo;
2140 }
2141 else {
2142 wxASSERT( str.GetStringData()->IsValid() );
2143
2144 Grow(nInsert);
2145
2146 for (size_t i = 0; i < nInsert; i++)
2147 {
2148 // the string data must not be deleted!
2149 str.GetStringData()->Lock();
2150
2151 // just append
2152 m_pItems[m_nCount + i] = (wxChar *)str.c_str(); // const_cast
2153 }
2154 size_t ret = m_nCount;
2155 m_nCount += nInsert;
2156 return ret;
2157 }
2158 }
2159
2160 // add item at the given position
2161 void wxArrayString::Insert(const wxString& str, size_t nIndex, size_t nInsert)
2162 {
2163 wxASSERT( str.GetStringData()->IsValid() );
2164
2165 wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArrayString::Insert") );
2166 wxCHECK_RET( m_nCount <= m_nCount + nInsert,
2167 wxT("array size overflow in wxArrayString::Insert") );
2168
2169 Grow(nInsert);
2170
2171 memmove(&m_pItems[nIndex + nInsert], &m_pItems[nIndex],
2172 (m_nCount - nIndex)*sizeof(wxChar *));
2173
2174 for (size_t i = 0; i < nInsert; i++)
2175 {
2176 str.GetStringData()->Lock();
2177 m_pItems[nIndex + i] = (wxChar *)str.c_str();
2178 }
2179 m_nCount += nInsert;
2180 }
2181
2182 // expand the array
2183 void wxArrayString::SetCount(size_t count)
2184 {
2185 Alloc(count);
2186
2187 wxString s;
2188 while ( m_nCount < count )
2189 m_pItems[m_nCount++] = (wxChar *)s.c_str();
2190 }
2191
2192 // removes item from array (by index)
2193 void wxArrayString::RemoveAt(size_t nIndex, size_t nRemove)
2194 {
2195 wxCHECK_RET( nIndex < m_nCount, wxT("bad index in wxArrayString::Remove") );
2196 wxCHECK_RET( nIndex + nRemove <= m_nCount,
2197 wxT("removing too many elements in wxArrayString::Remove") );
2198
2199 // release our lock
2200 for (size_t i = 0; i < nRemove; i++)
2201 Item(nIndex + i).GetStringData()->Unlock();
2202
2203 memmove(&m_pItems[nIndex], &m_pItems[nIndex + nRemove],
2204 (m_nCount - nIndex - nRemove)*sizeof(wxChar *));
2205 m_nCount -= nRemove;
2206 }
2207
2208 // removes item from array (by value)
2209 void wxArrayString::Remove(const wxChar *sz)
2210 {
2211 int iIndex = Index(sz);
2212
2213 wxCHECK_RET( iIndex != wxNOT_FOUND,
2214 wxT("removing inexistent element in wxArrayString::Remove") );
2215
2216 RemoveAt(iIndex);
2217 }
2218
2219 void wxArrayString::assign(const_iterator first, const_iterator last)
2220 {
2221 reserve(last - first);
2222 for(; first != last; ++first)
2223 push_back(*first);
2224 }
2225
2226 // ----------------------------------------------------------------------------
2227 // sorting
2228 // ----------------------------------------------------------------------------
2229
2230 // we can only sort one array at a time with the quick-sort based
2231 // implementation
2232 #if wxUSE_THREADS
2233 // need a critical section to protect access to gs_compareFunction and
2234 // gs_sortAscending variables
2235 static wxCriticalSection *gs_critsectStringSort = NULL;
2236
2237 // call this before the value of the global sort vars is changed/after
2238 // you're finished with them
2239 #define START_SORT() wxASSERT( !gs_critsectStringSort ); \
2240 gs_critsectStringSort = new wxCriticalSection; \
2241 gs_critsectStringSort->Enter()
2242 #define END_SORT() gs_critsectStringSort->Leave(); \
2243 delete gs_critsectStringSort; \
2244 gs_critsectStringSort = NULL
2245 #else // !threads
2246 #define START_SORT()
2247 #define END_SORT()
2248 #endif // wxUSE_THREADS
2249
2250 // function to use for string comparaison
2251 static wxArrayString::CompareFunction gs_compareFunction = NULL;
2252
2253 // if we don't use the compare function, this flag tells us if we sort the
2254 // array in ascending or descending order
2255 static bool gs_sortAscending = TRUE;
2256
2257 // function which is called by quick sort
2258 extern "C" int wxC_CALLING_CONV // LINKAGEMODE
2259 wxStringCompareFunction(const void *first, const void *second)
2260 {
2261 wxString *strFirst = (wxString *)first;
2262 wxString *strSecond = (wxString *)second;
2263
2264 if ( gs_compareFunction ) {
2265 return gs_compareFunction(*strFirst, *strSecond);
2266 }
2267 else {
2268 // maybe we should use wxStrcoll
2269 int result = wxStrcmp(strFirst->c_str(), strSecond->c_str());
2270
2271 return gs_sortAscending ? result : -result;
2272 }
2273 }
2274
2275 // sort array elements using passed comparaison function
2276 void wxArrayString::Sort(CompareFunction compareFunction)
2277 {
2278 START_SORT();
2279
2280 wxASSERT( !gs_compareFunction ); // must have been reset to NULL
2281 gs_compareFunction = compareFunction;
2282
2283 DoSort();
2284
2285 // reset it to NULL so that Sort(bool) will work the next time
2286 gs_compareFunction = NULL;
2287
2288 END_SORT();
2289 }
2290
2291 typedef int (wxC_CALLING_CONV * wxStringCompareFn)(const void *first, const void *second);
2292
2293 void wxArrayString::Sort(CompareFunction2 compareFunction)
2294 {
2295 qsort(m_pItems, m_nCount, sizeof(wxChar *), (wxStringCompareFn)compareFunction);
2296 }
2297
2298 void wxArrayString::Sort(bool reverseOrder)
2299 {
2300 Sort(reverseOrder ? wxStringSortDescending : wxStringSortAscending);
2301 }
2302
2303 void wxArrayString::DoSort()
2304 {
2305 wxCHECK_RET( !m_autoSort, wxT("can't use this method with sorted arrays") );
2306
2307 // just sort the pointers using qsort() - of course it only works because
2308 // wxString() *is* a pointer to its data
2309 qsort(m_pItems, m_nCount, sizeof(wxChar *), wxStringCompareFunction);
2310 }
2311
2312 bool wxArrayString::operator==(const wxArrayString& a) const
2313 {
2314 if ( m_nCount != a.m_nCount )
2315 return FALSE;
2316
2317 for ( size_t n = 0; n < m_nCount; n++ )
2318 {
2319 if ( Item(n) != a[n] )
2320 return FALSE;
2321 }
2322
2323 return TRUE;
2324 }
2325
2326 #endif // !wxUSE_STL
2327
2328 int wxCMPFUNC_CONV wxStringSortAscending(wxString* s1, wxString* s2)
2329 {
2330 return wxStrcmp(s1->c_str(), s2->c_str());
2331 }
2332
2333 int wxCMPFUNC_CONV wxStringSortDescending(wxString* s1, wxString* s2)
2334 {
2335 return -wxStrcmp(s1->c_str(), s2->c_str());
2336 }