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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/string.cpp
3 // Purpose: wxString class
4 // Author: Vadim Zeitlin, Ryan Norton
5 // Modified by:
6 // Created: 29/01/98
7 // RCS-ID: $Id$
8 // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
9 // (c) 2004 Ryan Norton <wxprojects@comcast.net>
10 // Licence: wxWindows licence
11 /////////////////////////////////////////////////////////////////////////////
12
13 // ===========================================================================
14 // headers, declarations, constants
15 // ===========================================================================
16
17 // For compilers that support precompilation, includes "wx.h".
18 #include "wx/wxprec.h"
19
20 #ifdef __BORLANDC__
21 #pragma hdrstop
22 #endif
23
24 #ifndef WX_PRECOMP
25 #include "wx/string.h"
26 #include "wx/wxcrtvararg.h"
27 #endif
28
29 #include <ctype.h>
30
31 #ifndef __WXWINCE__
32 #include <errno.h>
33 #endif
34
35 #include <string.h>
36 #include <stdlib.h>
37
38 #ifdef __SALFORDC__
39 #include <clib.h>
40 #endif
41
42 #include "wx/hashmap.h"
43
44 // string handling functions used by wxString:
45 #if wxUSE_UNICODE_UTF8
46 #define wxStringMemcpy memcpy
47 #define wxStringMemcmp memcmp
48 #define wxStringMemchr memchr
49 #define wxStringStrlen strlen
50 #else
51 #define wxStringMemcpy wxTmemcpy
52 #define wxStringMemcmp wxTmemcmp
53 #define wxStringMemchr wxTmemchr
54 #define wxStringStrlen wxStrlen
55 #endif
56
57
58 // ---------------------------------------------------------------------------
59 // static class variables definition
60 // ---------------------------------------------------------------------------
61
62 //According to STL _must_ be a -1 size_t
63 const size_t wxString::npos = (size_t) -1;
64
65 // ----------------------------------------------------------------------------
66 // global functions
67 // ----------------------------------------------------------------------------
68
69 #if wxUSE_STD_IOSTREAM
70
71 #include <iostream>
72
73 wxSTD ostream& operator<<(wxSTD ostream& os, const wxCStrData& str)
74 {
75 // FIXME-UTF8: always, not only if wxUSE_UNICODE
76 #if wxUSE_UNICODE && !defined(__BORLANDC__)
77 return os << (const wchar_t*)str.AsWCharBuf();
78 #else
79 return os << (const char*)str.AsCharBuf();
80 #endif
81 }
82
83 wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str)
84 {
85 return os << str.c_str();
86 }
87
88 wxSTD ostream& operator<<(wxSTD ostream& os, const wxCharBuffer& str)
89 {
90 return os << str.data();
91 }
92
93 #ifndef __BORLANDC__
94 wxSTD ostream& operator<<(wxSTD ostream& os, const wxWCharBuffer& str)
95 {
96 return os << str.data();
97 }
98 #endif
99
100 #endif // wxUSE_STD_IOSTREAM
101
102 // ===========================================================================
103 // wxString class core
104 // ===========================================================================
105
106 #if wxUSE_UNICODE_UTF8
107
108 void wxString::PosLenToImpl(size_t pos, size_t len,
109 size_t *implPos, size_t *implLen) const
110 {
111 if ( pos == npos )
112 *implPos = npos;
113 else
114 {
115 const_iterator i = begin() + pos;
116 *implPos = wxStringImpl::const_iterator(i.impl()) - m_impl.begin();
117 if ( len == npos )
118 *implLen = npos;
119 else
120 {
121 // too large length is interpreted as "to the end of the string"
122 // FIXME-UTF8: verify this is the case in std::string, assert
123 // otherwise
124 if ( pos + len > length() )
125 len = length() - pos;
126
127 *implLen = (i + len).impl() - i.impl();
128 }
129 }
130 }
131
132 #endif // wxUSE_UNICODE_UTF8
133
134 // ----------------------------------------------------------------------------
135 // wxCStrData converted strings caching
136 // ----------------------------------------------------------------------------
137
138 // FIXME-UTF8: temporarily disabled because it doesn't work with global
139 // string objects; re-enable after fixing this bug and benchmarking
140 // performance to see if using a hash is a good idea at all
141 #if 0
142
143 // For backward compatibility reasons, it must be possible to assign the value
144 // returned by wxString::c_str() to a char* or wchar_t* variable and work with
145 // it. Returning wxCharBuffer from (const char*)c_str() wouldn't do the trick,
146 // because the memory would be freed immediately, but it has to be valid as long
147 // as the string is not modified, so that code like this still works:
148 //
149 // const wxChar *s = str.c_str();
150 // while ( s ) { ... }
151
152 // FIXME-UTF8: not thread safe!
153 // FIXME-UTF8: we currently clear the cached conversion only when the string is
154 // destroyed, but we should do it when the string is modified, to
155 // keep memory usage down
156 // FIXME-UTF8: we do the conversion every time As[W]Char() is called, but if we
157 // invalidated the cache on every change, we could keep the previous
158 // conversion
159 // FIXME-UTF8: add tracing of usage of these two methods - new code is supposed
160 // to use mb_str() or wc_str() instead of (const [w]char*)c_str()
161
162 template<typename T>
163 static inline void DeleteStringFromConversionCache(T& hash, const wxString *s)
164 {
165 typename T::iterator i = hash.find(wxConstCast(s, wxString));
166 if ( i != hash.end() )
167 {
168 free(i->second);
169 hash.erase(i);
170 }
171 }
172
173 #if wxUSE_UNICODE
174 // NB: non-STL implementation doesn't compile with "const wxString*" key type,
175 // so we have to use wxString* here and const-cast when used
176 WX_DECLARE_HASH_MAP(wxString*, char*, wxPointerHash, wxPointerEqual,
177 wxStringCharConversionCache);
178 static wxStringCharConversionCache gs_stringsCharCache;
179
180 const char* wxCStrData::AsChar() const
181 {
182 // remove previously cache value, if any (see FIXMEs above):
183 DeleteStringFromConversionCache(gs_stringsCharCache, m_str);
184
185 // convert the string and keep it:
186 const char *s = gs_stringsCharCache[wxConstCast(m_str, wxString)] =
187 m_str->mb_str().release();
188
189 return s + m_offset;
190 }
191 #endif // wxUSE_UNICODE
192
193 #if !wxUSE_UNICODE_WCHAR
194 WX_DECLARE_HASH_MAP(wxString*, wchar_t*, wxPointerHash, wxPointerEqual,
195 wxStringWCharConversionCache);
196 static wxStringWCharConversionCache gs_stringsWCharCache;
197
198 const wchar_t* wxCStrData::AsWChar() const
199 {
200 // remove previously cache value, if any (see FIXMEs above):
201 DeleteStringFromConversionCache(gs_stringsWCharCache, m_str);
202
203 // convert the string and keep it:
204 const wchar_t *s = gs_stringsWCharCache[wxConstCast(m_str, wxString)] =
205 m_str->wc_str().release();
206
207 return s + m_offset;
208 }
209 #endif // !wxUSE_UNICODE_WCHAR
210
211 wxString::~wxString()
212 {
213 #if wxUSE_UNICODE
214 // FIXME-UTF8: do this only if locale is not UTF8 if wxUSE_UNICODE_UTF8
215 DeleteStringFromConversionCache(gs_stringsCharCache, this);
216 #endif
217 #if !wxUSE_UNICODE_WCHAR
218 DeleteStringFromConversionCache(gs_stringsWCharCache, this);
219 #endif
220 }
221 #endif
222
223 #if wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
224 const char* wxCStrData::AsChar() const
225 {
226 #if wxUSE_UNICODE_UTF8
227 if ( wxLocaleIsUtf8 )
228 return AsInternal();
229 #endif
230 // under non-UTF8 locales, we have to convert the internal UTF-8
231 // representation using wxConvLibc and cache the result
232
233 wxString *str = wxConstCast(m_str, wxString);
234
235 // convert the string:
236 wxCharBuffer buf(str->mb_str());
237
238 // FIXME-UTF8: do the conversion in-place in the existing buffer
239 if ( str->m_convertedToChar &&
240 strlen(buf) == strlen(str->m_convertedToChar) )
241 {
242 // keep the same buffer for as long as possible, so that several calls
243 // to c_str() in a row still work:
244 strcpy(str->m_convertedToChar, buf);
245 }
246 else
247 {
248 str->m_convertedToChar = buf.release();
249 }
250
251 // and keep it:
252 return str->m_convertedToChar + m_offset;
253 }
254 #endif // wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
255
256 #if !wxUSE_UNICODE_WCHAR
257 const wchar_t* wxCStrData::AsWChar() const
258 {
259 wxString *str = wxConstCast(m_str, wxString);
260
261 // convert the string:
262 wxWCharBuffer buf(str->wc_str());
263
264 // FIXME-UTF8: do the conversion in-place in the existing buffer
265 if ( str->m_convertedToWChar &&
266 wxWcslen(buf) == wxWcslen(str->m_convertedToWChar) )
267 {
268 // keep the same buffer for as long as possible, so that several calls
269 // to c_str() in a row still work:
270 memcpy(str->m_convertedToWChar, buf, sizeof(wchar_t) * wxWcslen(buf));
271 }
272 else
273 {
274 str->m_convertedToWChar = buf.release();
275 }
276
277 // and keep it:
278 return str->m_convertedToWChar + m_offset;
279 }
280 #endif // !wxUSE_UNICODE_WCHAR
281
282 // ===========================================================================
283 // wxString class core
284 // ===========================================================================
285
286 // ---------------------------------------------------------------------------
287 // construction and conversion
288 // ---------------------------------------------------------------------------
289
290 #if wxUSE_UNICODE_WCHAR
291 /* static */
292 wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength,
293 const wxMBConv& conv)
294 {
295 // anything to do?
296 if ( !psz || nLength == 0 )
297 return SubstrBufFromMB(L"", 0);
298
299 if ( nLength == npos )
300 nLength = wxNO_LEN;
301
302 size_t wcLen;
303 wxWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen));
304 if ( !wcLen )
305 return SubstrBufFromMB(_T(""), 0);
306 else
307 return SubstrBufFromMB(wcBuf, wcLen);
308 }
309 #endif // wxUSE_UNICODE_WCHAR
310
311 #if wxUSE_UNICODE_UTF8
312 /* static */
313 wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength,
314 const wxMBConv& conv)
315 {
316 // anything to do?
317 if ( !psz || nLength == 0 )
318 return SubstrBufFromMB("", 0);
319
320 // if psz is already in UTF-8, we don't have to do the roundtrip to
321 // wchar_t* and back:
322 if ( conv.IsUTF8() )
323 {
324 // we need to validate the input because UTF8 iterators assume valid
325 // UTF-8 sequence and psz may be invalid:
326 if ( wxStringOperations::IsValidUtf8String(psz, nLength) )
327 {
328 return SubstrBufFromMB(wxCharBuffer::CreateNonOwned(psz), nLength);
329 }
330 // else: do the roundtrip through wchar_t*
331 }
332
333 if ( nLength == npos )
334 nLength = wxNO_LEN;
335
336 // first convert to wide string:
337 size_t wcLen;
338 wxWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen));
339 if ( !wcLen )
340 return SubstrBufFromMB("", 0);
341
342 // and then to UTF-8:
343 SubstrBufFromMB buf(ConvertStr(wcBuf, wcLen, wxMBConvUTF8()));
344 // widechar -> UTF-8 conversion isn't supposed to ever fail:
345 wxASSERT_MSG( buf.data, _T("conversion to UTF-8 failed") );
346
347 return buf;
348 }
349 #endif // wxUSE_UNICODE_UTF8
350
351 #if wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
352 /* static */
353 wxString::SubstrBufFromWC wxString::ConvertStr(const wchar_t *pwz, size_t nLength,
354 const wxMBConv& conv)
355 {
356 // anything to do?
357 if ( !pwz || nLength == 0 )
358 return SubstrBufFromWC("", 0);
359
360 if ( nLength == npos )
361 nLength = wxNO_LEN;
362
363 size_t mbLen;
364 wxCharBuffer mbBuf(conv.cWC2MB(pwz, nLength, &mbLen));
365 if ( !mbLen )
366 return SubstrBufFromWC("", 0);
367 else
368 return SubstrBufFromWC(mbBuf, mbLen);
369 }
370 #endif // wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
371
372
373 #if wxUSE_UNICODE_WCHAR
374
375 //Convert wxString in Unicode mode to a multi-byte string
376 const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const
377 {
378 return conv.cWC2MB(wx_str(), length() + 1 /* size, not length */, NULL);
379 }
380
381 #elif wxUSE_UNICODE_UTF8
382
383 const wxWCharBuffer wxString::wc_str() const
384 {
385 return wxMBConvUTF8().cMB2WC(m_impl.c_str(),
386 m_impl.length() + 1 /* size, not length */,
387 NULL);
388 }
389
390 const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const
391 {
392 if ( conv.IsUTF8() )
393 return wxCharBuffer::CreateNonOwned(m_impl.c_str());
394
395 // FIXME-UTF8: use wc_str() here once we have buffers with length
396
397 size_t wcLen;
398 wxWCharBuffer wcBuf(
399 wxMBConvUTF8().cMB2WC(m_impl.c_str(),
400 m_impl.length() + 1 /* size, not length */,
401 &wcLen));
402 if ( !wcLen )
403 return wxCharBuffer("");
404
405 return conv.cWC2MB(wcBuf, wcLen, NULL);
406 }
407
408 #else // ANSI
409
410 //Converts this string to a wide character string if unicode
411 //mode is not enabled and wxUSE_WCHAR_T is enabled
412 const wxWCharBuffer wxString::wc_str(const wxMBConv& conv) const
413 {
414 return conv.cMB2WC(wx_str(), length() + 1 /* size, not length */, NULL);
415 }
416
417 #endif // Unicode/ANSI
418
419 // shrink to minimal size (releasing extra memory)
420 bool wxString::Shrink()
421 {
422 wxString tmp(begin(), end());
423 swap(tmp);
424 return tmp.length() == length();
425 }
426
427 // deprecated compatibility code:
428 #if WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
429 wxStringCharType *wxString::GetWriteBuf(size_t nLen)
430 {
431 return DoGetWriteBuf(nLen);
432 }
433
434 void wxString::UngetWriteBuf()
435 {
436 DoUngetWriteBuf();
437 }
438
439 void wxString::UngetWriteBuf(size_t nLen)
440 {
441 DoUngetWriteBuf(nLen);
442 }
443 #endif // WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
444
445
446 // ---------------------------------------------------------------------------
447 // data access
448 // ---------------------------------------------------------------------------
449
450 // all functions are inline in string.h
451
452 // ---------------------------------------------------------------------------
453 // concatenation operators
454 // ---------------------------------------------------------------------------
455
456 /*
457 * concatenation functions come in 5 flavours:
458 * string + string
459 * char + string and string + char
460 * C str + string and string + C str
461 */
462
463 wxString operator+(const wxString& str1, const wxString& str2)
464 {
465 #if !wxUSE_STL_BASED_WXSTRING
466 wxASSERT( str1.IsValid() );
467 wxASSERT( str2.IsValid() );
468 #endif
469
470 wxString s = str1;
471 s += str2;
472
473 return s;
474 }
475
476 wxString operator+(const wxString& str, wxUniChar ch)
477 {
478 #if !wxUSE_STL_BASED_WXSTRING
479 wxASSERT( str.IsValid() );
480 #endif
481
482 wxString s = str;
483 s += ch;
484
485 return s;
486 }
487
488 wxString operator+(wxUniChar ch, const wxString& str)
489 {
490 #if !wxUSE_STL_BASED_WXSTRING
491 wxASSERT( str.IsValid() );
492 #endif
493
494 wxString s = ch;
495 s += str;
496
497 return s;
498 }
499
500 wxString operator+(const wxString& str, const char *psz)
501 {
502 #if !wxUSE_STL_BASED_WXSTRING
503 wxASSERT( str.IsValid() );
504 #endif
505
506 wxString s;
507 if ( !s.Alloc(strlen(psz) + str.length()) ) {
508 wxFAIL_MSG( _T("out of memory in wxString::operator+") );
509 }
510 s += str;
511 s += psz;
512
513 return s;
514 }
515
516 wxString operator+(const wxString& str, const wchar_t *pwz)
517 {
518 #if !wxUSE_STL_BASED_WXSTRING
519 wxASSERT( str.IsValid() );
520 #endif
521
522 wxString s;
523 if ( !s.Alloc(wxWcslen(pwz) + str.length()) ) {
524 wxFAIL_MSG( _T("out of memory in wxString::operator+") );
525 }
526 s += str;
527 s += pwz;
528
529 return s;
530 }
531
532 wxString operator+(const char *psz, const wxString& str)
533 {
534 #if !wxUSE_STL_BASED_WXSTRING
535 wxASSERT( str.IsValid() );
536 #endif
537
538 wxString s;
539 if ( !s.Alloc(strlen(psz) + str.length()) ) {
540 wxFAIL_MSG( _T("out of memory in wxString::operator+") );
541 }
542 s = psz;
543 s += str;
544
545 return s;
546 }
547
548 wxString operator+(const wchar_t *pwz, const wxString& str)
549 {
550 #if !wxUSE_STL_BASED_WXSTRING
551 wxASSERT( str.IsValid() );
552 #endif
553
554 wxString s;
555 if ( !s.Alloc(wxWcslen(pwz) + str.length()) ) {
556 wxFAIL_MSG( _T("out of memory in wxString::operator+") );
557 }
558 s = pwz;
559 s += str;
560
561 return s;
562 }
563
564 // ---------------------------------------------------------------------------
565 // string comparison
566 // ---------------------------------------------------------------------------
567
568 #ifdef HAVE_STD_STRING_COMPARE
569
570 // NB: Comparison code (both if HAVE_STD_STRING_COMPARE and if not) works with
571 // UTF-8 encoded strings too, thanks to UTF-8's design which allows us to
572 // sort strings in characters code point order by sorting the byte sequence
573 // in byte values order (i.e. what strcmp() and memcmp() do).
574
575 int wxString::compare(const wxString& str) const
576 {
577 return m_impl.compare(str.m_impl);
578 }
579
580 int wxString::compare(size_t nStart, size_t nLen,
581 const wxString& str) const
582 {
583 size_t pos, len;
584 PosLenToImpl(nStart, nLen, &pos, &len);
585 return m_impl.compare(pos, len, str.m_impl);
586 }
587
588 int wxString::compare(size_t nStart, size_t nLen,
589 const wxString& str,
590 size_t nStart2, size_t nLen2) const
591 {
592 size_t pos, len;
593 PosLenToImpl(nStart, nLen, &pos, &len);
594
595 size_t pos2, len2;
596 str.PosLenToImpl(nStart2, nLen2, &pos2, &len2);
597
598 return m_impl.compare(pos, len, str.m_impl, pos2, len2);
599 }
600
601 int wxString::compare(const char* sz) const
602 {
603 return m_impl.compare(ImplStr(sz));
604 }
605
606 int wxString::compare(const wchar_t* sz) const
607 {
608 return m_impl.compare(ImplStr(sz));
609 }
610
611 int wxString::compare(size_t nStart, size_t nLen,
612 const char* sz, size_t nCount) const
613 {
614 size_t pos, len;
615 PosLenToImpl(nStart, nLen, &pos, &len);
616
617 SubstrBufFromMB str(ImplStr(sz, nCount));
618
619 return m_impl.compare(pos, len, str.data, str.len);
620 }
621
622 int wxString::compare(size_t nStart, size_t nLen,
623 const wchar_t* sz, size_t nCount) const
624 {
625 size_t pos, len;
626 PosLenToImpl(nStart, nLen, &pos, &len);
627
628 SubstrBufFromWC str(ImplStr(sz, nCount));
629
630 return m_impl.compare(pos, len, str.data, str.len);
631 }
632
633 #else // !HAVE_STD_STRING_COMPARE
634
635 static inline int wxDoCmp(const wxStringCharType* s1, size_t l1,
636 const wxStringCharType* s2, size_t l2)
637 {
638 if( l1 == l2 )
639 return wxStringMemcmp(s1, s2, l1);
640 else if( l1 < l2 )
641 {
642 int ret = wxStringMemcmp(s1, s2, l1);
643 return ret == 0 ? -1 : ret;
644 }
645 else
646 {
647 int ret = wxStringMemcmp(s1, s2, l2);
648 return ret == 0 ? +1 : ret;
649 }
650 }
651
652 int wxString::compare(const wxString& str) const
653 {
654 return ::wxDoCmp(m_impl.data(), m_impl.length(),
655 str.m_impl.data(), str.m_impl.length());
656 }
657
658 int wxString::compare(size_t nStart, size_t nLen,
659 const wxString& str) const
660 {
661 wxASSERT(nStart <= length());
662 size_type strLen = length() - nStart;
663 nLen = strLen < nLen ? strLen : nLen;
664
665 size_t pos, len;
666 PosLenToImpl(nStart, nLen, &pos, &len);
667
668 return ::wxDoCmp(m_impl.data() + pos, len,
669 str.m_impl.data(), str.m_impl.length());
670 }
671
672 int wxString::compare(size_t nStart, size_t nLen,
673 const wxString& str,
674 size_t nStart2, size_t nLen2) const
675 {
676 wxASSERT(nStart <= length());
677 wxASSERT(nStart2 <= str.length());
678 size_type strLen = length() - nStart,
679 strLen2 = str.length() - nStart2;
680 nLen = strLen < nLen ? strLen : nLen;
681 nLen2 = strLen2 < nLen2 ? strLen2 : nLen2;
682
683 size_t pos, len;
684 PosLenToImpl(nStart, nLen, &pos, &len);
685 size_t pos2, len2;
686 str.PosLenToImpl(nStart2, nLen2, &pos2, &len2);
687
688 return ::wxDoCmp(m_impl.data() + pos, len,
689 str.m_impl.data() + pos2, len2);
690 }
691
692 int wxString::compare(const char* sz) const
693 {
694 SubstrBufFromMB str(ImplStr(sz, npos));
695 if ( str.len == npos )
696 str.len = wxStringStrlen(str.data);
697 return ::wxDoCmp(m_impl.data(), m_impl.length(), str.data, str.len);
698 }
699
700 int wxString::compare(const wchar_t* sz) const
701 {
702 SubstrBufFromWC str(ImplStr(sz, npos));
703 if ( str.len == npos )
704 str.len = wxStringStrlen(str.data);
705 return ::wxDoCmp(m_impl.data(), m_impl.length(), str.data, str.len);
706 }
707
708 int wxString::compare(size_t nStart, size_t nLen,
709 const char* sz, size_t nCount) const
710 {
711 wxASSERT(nStart <= length());
712 size_type strLen = length() - nStart;
713 nLen = strLen < nLen ? strLen : nLen;
714
715 size_t pos, len;
716 PosLenToImpl(nStart, nLen, &pos, &len);
717
718 SubstrBufFromMB str(ImplStr(sz, nCount));
719 if ( str.len == npos )
720 str.len = wxStringStrlen(str.data);
721
722 return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len);
723 }
724
725 int wxString::compare(size_t nStart, size_t nLen,
726 const wchar_t* sz, size_t nCount) const
727 {
728 wxASSERT(nStart <= length());
729 size_type strLen = length() - nStart;
730 nLen = strLen < nLen ? strLen : nLen;
731
732 size_t pos, len;
733 PosLenToImpl(nStart, nLen, &pos, &len);
734
735 SubstrBufFromWC str(ImplStr(sz, nCount));
736 if ( str.len == npos )
737 str.len = wxStringStrlen(str.data);
738
739 return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len);
740 }
741
742 #endif // HAVE_STD_STRING_COMPARE/!HAVE_STD_STRING_COMPARE
743
744
745 // ---------------------------------------------------------------------------
746 // find_{first,last}_[not]_of functions
747 // ---------------------------------------------------------------------------
748
749 #if !wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8
750
751 // NB: All these functions are implemented with the argument being wxChar*,
752 // i.e. widechar string in any Unicode build, even though native string
753 // representation is char* in the UTF-8 build. This is because we couldn't
754 // use memchr() to determine if a character is in a set encoded as UTF-8.
755
756 size_t wxString::find_first_of(const wxChar* sz, size_t nStart) const
757 {
758 return find_first_of(sz, nStart, wxStrlen(sz));
759 }
760
761 size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart) const
762 {
763 return find_first_not_of(sz, nStart, wxStrlen(sz));
764 }
765
766 size_t wxString::find_first_of(const wxChar* sz, size_t nStart, size_t n) const
767 {
768 wxASSERT_MSG( nStart <= length(), _T("invalid index") );
769
770 size_t idx = nStart;
771 for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i )
772 {
773 if ( wxTmemchr(sz, *i, n) )
774 return idx;
775 }
776
777 return npos;
778 }
779
780 size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart, size_t n) const
781 {
782 wxASSERT_MSG( nStart <= length(), _T("invalid index") );
783
784 size_t idx = nStart;
785 for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i )
786 {
787 if ( !wxTmemchr(sz, *i, n) )
788 return idx;
789 }
790
791 return npos;
792 }
793
794
795 size_t wxString::find_last_of(const wxChar* sz, size_t nStart) const
796 {
797 return find_last_of(sz, nStart, wxStrlen(sz));
798 }
799
800 size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart) const
801 {
802 return find_last_not_of(sz, nStart, wxStrlen(sz));
803 }
804
805 size_t wxString::find_last_of(const wxChar* sz, size_t nStart, size_t n) const
806 {
807 size_t len = length();
808
809 if ( nStart == npos )
810 {
811 nStart = len - 1;
812 }
813 else
814 {
815 wxASSERT_MSG( nStart <= len, _T("invalid index") );
816 }
817
818 size_t idx = nStart;
819 for ( const_reverse_iterator i = rbegin() + (len - nStart - 1);
820 i != rend(); --idx, ++i )
821 {
822 if ( wxTmemchr(sz, *i, n) )
823 return idx;
824 }
825
826 return npos;
827 }
828
829 size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart, size_t n) const
830 {
831 size_t len = length();
832
833 if ( nStart == npos )
834 {
835 nStart = len - 1;
836 }
837 else
838 {
839 wxASSERT_MSG( nStart <= len, _T("invalid index") );
840 }
841
842 size_t idx = nStart;
843 for ( const_reverse_iterator i = rbegin() + (len - nStart - 1);
844 i != rend(); --idx, ++i )
845 {
846 if ( !wxTmemchr(sz, *i, n) )
847 return idx;
848 }
849
850 return npos;
851 }
852
853 size_t wxString::find_first_not_of(wxUniChar ch, size_t nStart) const
854 {
855 wxASSERT_MSG( nStart <= length(), _T("invalid index") );
856
857 size_t idx = nStart;
858 for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i )
859 {
860 if ( *i != ch )
861 return idx;
862 }
863
864 return npos;
865 }
866
867 size_t wxString::find_last_not_of(wxUniChar ch, size_t nStart) const
868 {
869 size_t len = length();
870
871 if ( nStart == npos )
872 {
873 nStart = len - 1;
874 }
875 else
876 {
877 wxASSERT_MSG( nStart <= len, _T("invalid index") );
878 }
879
880 size_t idx = nStart;
881 for ( const_reverse_iterator i = rbegin() + (len - nStart - 1);
882 i != rend(); --idx, ++i )
883 {
884 if ( *i != ch )
885 return idx;
886 }
887
888 return npos;
889 }
890
891 // the functions above were implemented for wchar_t* arguments in Unicode
892 // build and char* in ANSI build; below are implementations for the other
893 // version:
894 #if wxUSE_UNICODE
895 #define wxOtherCharType char
896 #define STRCONV (const wxChar*)wxConvLibc.cMB2WC
897 #else
898 #define wxOtherCharType wchar_t
899 #define STRCONV (const wxChar*)wxConvLibc.cWC2MB
900 #endif
901
902 size_t wxString::find_first_of(const wxOtherCharType* sz, size_t nStart) const
903 { return find_first_of(STRCONV(sz), nStart); }
904
905 size_t wxString::find_first_of(const wxOtherCharType* sz, size_t nStart,
906 size_t n) const
907 { return find_first_of(STRCONV(sz, n, NULL), nStart, n); }
908 size_t wxString::find_last_of(const wxOtherCharType* sz, size_t nStart) const
909 { return find_last_of(STRCONV(sz), nStart); }
910 size_t wxString::find_last_of(const wxOtherCharType* sz, size_t nStart,
911 size_t n) const
912 { return find_last_of(STRCONV(sz, n, NULL), nStart, n); }
913 size_t wxString::find_first_not_of(const wxOtherCharType* sz, size_t nStart) const
914 { return find_first_not_of(STRCONV(sz), nStart); }
915 size_t wxString::find_first_not_of(const wxOtherCharType* sz, size_t nStart,
916 size_t n) const
917 { return find_first_not_of(STRCONV(sz, n, NULL), nStart, n); }
918 size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart) const
919 { return find_last_not_of(STRCONV(sz), nStart); }
920 size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart,
921 size_t n) const
922 { return find_last_not_of(STRCONV(sz, n, NULL), nStart, n); }
923
924 #undef wxOtherCharType
925 #undef STRCONV
926
927 #endif // !wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8
928
929 // ===========================================================================
930 // other common string functions
931 // ===========================================================================
932
933 int wxString::CmpNoCase(const wxString& s) const
934 {
935 // FIXME-UTF8: use wxUniChar::ToLower/ToUpper once added
936
937 size_t idx = 0;
938 const_iterator i1 = begin();
939 const_iterator end1 = end();
940 const_iterator i2 = s.begin();
941 const_iterator end2 = s.end();
942
943 for ( ; i1 != end1 && i2 != end2; ++idx, ++i1, ++i2 )
944 {
945 wxUniChar lower1 = (wxChar)wxTolower(*i1);
946 wxUniChar lower2 = (wxChar)wxTolower(*i2);
947 if ( lower1 != lower2 )
948 return lower1 < lower2 ? -1 : 1;
949 }
950
951 size_t len1 = length();
952 size_t len2 = s.length();
953
954 if ( len1 < len2 )
955 return -1;
956 else if ( len1 > len2 )
957 return 1;
958 return 0;
959 }
960
961
962 #if wxUSE_UNICODE
963
964 #ifdef __MWERKS__
965 #ifndef __SCHAR_MAX__
966 #define __SCHAR_MAX__ 127
967 #endif
968 #endif
969
970 wxString wxString::FromAscii(const char *ascii)
971 {
972 if (!ascii)
973 return wxEmptyString;
974
975 size_t len = strlen(ascii);
976 wxString res;
977
978 if ( len )
979 {
980 wxImplStringBuffer buf(res, len);
981 wxStringCharType *dest = buf;
982
983 for ( ;; )
984 {
985 unsigned char c = (unsigned char)*ascii++;
986 wxASSERT_MSG( c < 0x80,
987 _T("Non-ASCII value passed to FromAscii().") );
988
989 *dest++ = (wchar_t)c;
990
991 if ( c == '\0' )
992 break;
993 }
994 }
995
996 return res;
997 }
998
999 wxString wxString::FromAscii(const char ascii)
1000 {
1001 // What do we do with '\0' ?
1002
1003 unsigned char c = (unsigned char)ascii;
1004
1005 wxASSERT_MSG( c < 0x80, _T("Non-ASCII value passed to FromAscii().") );
1006
1007 // NB: the cast to wchar_t causes interpretation of 'ascii' as Latin1 value
1008 return wxString(wxUniChar((wchar_t)c));
1009 }
1010
1011 const wxCharBuffer wxString::ToAscii() const
1012 {
1013 // this will allocate enough space for the terminating NUL too
1014 wxCharBuffer buffer(length());
1015 char *dest = buffer.data();
1016
1017 for ( const_iterator i = begin(); i != end(); ++i )
1018 {
1019 wxUniChar c(*i);
1020 // FIXME-UTF8: unify substituted char ('_') with wxUniChar ('?')
1021 *dest++ = c.IsAscii() ? (char)c : '_';
1022
1023 // the output string can't have embedded NULs anyhow, so we can safely
1024 // stop at first of them even if we do have any
1025 if ( !c )
1026 break;
1027 }
1028
1029 return buffer;
1030 }
1031
1032 #endif // wxUSE_UNICODE
1033
1034 // extract string of length nCount starting at nFirst
1035 wxString wxString::Mid(size_t nFirst, size_t nCount) const
1036 {
1037 size_t nLen = length();
1038
1039 // default value of nCount is npos and means "till the end"
1040 if ( nCount == npos )
1041 {
1042 nCount = nLen - nFirst;
1043 }
1044
1045 // out-of-bounds requests return sensible things
1046 if ( nFirst + nCount > nLen )
1047 {
1048 nCount = nLen - nFirst;
1049 }
1050
1051 if ( nFirst > nLen )
1052 {
1053 // AllocCopy() will return empty string
1054 return wxEmptyString;
1055 }
1056
1057 wxString dest(*this, nFirst, nCount);
1058 if ( dest.length() != nCount )
1059 {
1060 wxFAIL_MSG( _T("out of memory in wxString::Mid") );
1061 }
1062
1063 return dest;
1064 }
1065
1066 // check that the string starts with prefix and return the rest of the string
1067 // in the provided pointer if it is not NULL, otherwise return false
1068 bool wxString::StartsWith(const wxString& prefix, wxString *rest) const
1069 {
1070 if ( compare(0, prefix.length(), prefix) != 0 )
1071 return false;
1072
1073 if ( rest )
1074 {
1075 // put the rest of the string into provided pointer
1076 rest->assign(*this, prefix.length(), npos);
1077 }
1078
1079 return true;
1080 }
1081
1082
1083 // check that the string ends with suffix and return the rest of it in the
1084 // provided pointer if it is not NULL, otherwise return false
1085 bool wxString::EndsWith(const wxString& suffix, wxString *rest) const
1086 {
1087 int start = length() - suffix.length();
1088
1089 if ( start < 0 || compare(start, npos, suffix) != 0 )
1090 return false;
1091
1092 if ( rest )
1093 {
1094 // put the rest of the string into provided pointer
1095 rest->assign(*this, 0, start);
1096 }
1097
1098 return true;
1099 }
1100
1101
1102 // extract nCount last (rightmost) characters
1103 wxString wxString::Right(size_t nCount) const
1104 {
1105 if ( nCount > length() )
1106 nCount = length();
1107
1108 wxString dest(*this, length() - nCount, nCount);
1109 if ( dest.length() != nCount ) {
1110 wxFAIL_MSG( _T("out of memory in wxString::Right") );
1111 }
1112 return dest;
1113 }
1114
1115 // get all characters after the last occurence of ch
1116 // (returns the whole string if ch not found)
1117 wxString wxString::AfterLast(wxUniChar ch) const
1118 {
1119 wxString str;
1120 int iPos = Find(ch, true);
1121 if ( iPos == wxNOT_FOUND )
1122 str = *this;
1123 else
1124 str = wx_str() + iPos + 1;
1125
1126 return str;
1127 }
1128
1129 // extract nCount first (leftmost) characters
1130 wxString wxString::Left(size_t nCount) const
1131 {
1132 if ( nCount > length() )
1133 nCount = length();
1134
1135 wxString dest(*this, 0, nCount);
1136 if ( dest.length() != nCount ) {
1137 wxFAIL_MSG( _T("out of memory in wxString::Left") );
1138 }
1139 return dest;
1140 }
1141
1142 // get all characters before the first occurence of ch
1143 // (returns the whole string if ch not found)
1144 wxString wxString::BeforeFirst(wxUniChar ch) const
1145 {
1146 int iPos = Find(ch);
1147 if ( iPos == wxNOT_FOUND ) iPos = length();
1148 return wxString(*this, 0, iPos);
1149 }
1150
1151 /// get all characters before the last occurence of ch
1152 /// (returns empty string if ch not found)
1153 wxString wxString::BeforeLast(wxUniChar ch) const
1154 {
1155 wxString str;
1156 int iPos = Find(ch, true);
1157 if ( iPos != wxNOT_FOUND && iPos != 0 )
1158 str = wxString(c_str(), iPos);
1159
1160 return str;
1161 }
1162
1163 /// get all characters after the first occurence of ch
1164 /// (returns empty string if ch not found)
1165 wxString wxString::AfterFirst(wxUniChar ch) const
1166 {
1167 wxString str;
1168 int iPos = Find(ch);
1169 if ( iPos != wxNOT_FOUND )
1170 str = wx_str() + iPos + 1;
1171
1172 return str;
1173 }
1174
1175 // replace first (or all) occurences of some substring with another one
1176 size_t wxString::Replace(const wxString& strOld,
1177 const wxString& strNew, bool bReplaceAll)
1178 {
1179 // if we tried to replace an empty string we'd enter an infinite loop below
1180 wxCHECK_MSG( !strOld.empty(), 0,
1181 _T("wxString::Replace(): invalid parameter") );
1182
1183 size_t uiCount = 0; // count of replacements made
1184
1185 size_t uiOldLen = strOld.length();
1186 size_t uiNewLen = strNew.length();
1187
1188 size_t dwPos = 0;
1189
1190 while ( (*this)[dwPos] != wxT('\0') )
1191 {
1192 //DO NOT USE STRSTR HERE
1193 //this string can contain embedded null characters,
1194 //so strstr will function incorrectly
1195 dwPos = find(strOld, dwPos);
1196 if ( dwPos == npos )
1197 break; // exit the loop
1198 else
1199 {
1200 //replace this occurance of the old string with the new one
1201 replace(dwPos, uiOldLen, strNew, uiNewLen);
1202
1203 //move up pos past the string that was replaced
1204 dwPos += uiNewLen;
1205
1206 //increase replace count
1207 ++uiCount;
1208
1209 // stop now?
1210 if ( !bReplaceAll )
1211 break; // exit the loop
1212 }
1213 }
1214
1215 return uiCount;
1216 }
1217
1218 bool wxString::IsAscii() const
1219 {
1220 for ( const_iterator i = begin(); i != end(); ++i )
1221 {
1222 if ( !(*i).IsAscii() )
1223 return false;
1224 }
1225
1226 return true;
1227 }
1228
1229 bool wxString::IsWord() const
1230 {
1231 for ( const_iterator i = begin(); i != end(); ++i )
1232 {
1233 if ( !wxIsalpha(*i) )
1234 return false;
1235 }
1236
1237 return true;
1238 }
1239
1240 bool wxString::IsNumber() const
1241 {
1242 if ( empty() )
1243 return true;
1244
1245 const_iterator i = begin();
1246
1247 if ( *i == _T('-') || *i == _T('+') )
1248 ++i;
1249
1250 for ( ; i != end(); ++i )
1251 {
1252 if ( !wxIsdigit(*i) )
1253 return false;
1254 }
1255
1256 return true;
1257 }
1258
1259 wxString wxString::Strip(stripType w) const
1260 {
1261 wxString s = *this;
1262 if ( w & leading ) s.Trim(false);
1263 if ( w & trailing ) s.Trim(true);
1264 return s;
1265 }
1266
1267 // ---------------------------------------------------------------------------
1268 // case conversion
1269 // ---------------------------------------------------------------------------
1270
1271 wxString& wxString::MakeUpper()
1272 {
1273 for ( iterator it = begin(), en = end(); it != en; ++it )
1274 *it = (wxChar)wxToupper(*it);
1275
1276 return *this;
1277 }
1278
1279 wxString& wxString::MakeLower()
1280 {
1281 for ( iterator it = begin(), en = end(); it != en; ++it )
1282 *it = (wxChar)wxTolower(*it);
1283
1284 return *this;
1285 }
1286
1287 // ---------------------------------------------------------------------------
1288 // trimming and padding
1289 // ---------------------------------------------------------------------------
1290
1291 // some compilers (VC++ 6.0 not to name them) return true for a call to
1292 // isspace('ê') in the C locale which seems to be broken to me, but we have to
1293 // live with this by checking that the character is a 7 bit one - even if this
1294 // may fail to detect some spaces (I don't know if Unicode doesn't have
1295 // space-like symbols somewhere except in the first 128 chars), it is arguably
1296 // still better than trimming away accented letters
1297 inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); }
1298
1299 // trims spaces (in the sense of isspace) from left or right side
1300 wxString& wxString::Trim(bool bFromRight)
1301 {
1302 // first check if we're going to modify the string at all
1303 if ( !empty() &&
1304 (
1305 (bFromRight && wxSafeIsspace(GetChar(length() - 1))) ||
1306 (!bFromRight && wxSafeIsspace(GetChar(0u)))
1307 )
1308 )
1309 {
1310 if ( bFromRight )
1311 {
1312 // find last non-space character
1313 reverse_iterator psz = rbegin();
1314 while ( (psz != rend()) && wxSafeIsspace(*psz) )
1315 psz++;
1316
1317 // truncate at trailing space start
1318 erase(psz.base(), end());
1319 }
1320 else
1321 {
1322 // find first non-space character
1323 iterator psz = begin();
1324 while ( (psz != end()) && wxSafeIsspace(*psz) )
1325 psz++;
1326
1327 // fix up data and length
1328 erase(begin(), psz);
1329 }
1330 }
1331
1332 return *this;
1333 }
1334
1335 // adds nCount characters chPad to the string from either side
1336 wxString& wxString::Pad(size_t nCount, wxUniChar chPad, bool bFromRight)
1337 {
1338 wxString s(chPad, nCount);
1339
1340 if ( bFromRight )
1341 *this += s;
1342 else
1343 {
1344 s += *this;
1345 swap(s);
1346 }
1347
1348 return *this;
1349 }
1350
1351 // truncate the string
1352 wxString& wxString::Truncate(size_t uiLen)
1353 {
1354 if ( uiLen < length() )
1355 {
1356 erase(begin() + uiLen, end());
1357 }
1358 //else: nothing to do, string is already short enough
1359
1360 return *this;
1361 }
1362
1363 // ---------------------------------------------------------------------------
1364 // finding (return wxNOT_FOUND if not found and index otherwise)
1365 // ---------------------------------------------------------------------------
1366
1367 // find a character
1368 int wxString::Find(wxUniChar ch, bool bFromEnd) const
1369 {
1370 size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch);
1371
1372 return (idx == npos) ? wxNOT_FOUND : (int)idx;
1373 }
1374
1375 // ----------------------------------------------------------------------------
1376 // conversion to numbers
1377 // ----------------------------------------------------------------------------
1378
1379 // the implementation of all the functions below is exactly the same so factor
1380 // it out
1381
1382 template <typename T, typename F>
1383 bool wxStringToIntType(const wxChar *start,
1384 T *val,
1385 int base,
1386 F func)
1387 {
1388 wxCHECK_MSG( val, false, _T("NULL output pointer") );
1389 wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
1390
1391 #ifndef __WXWINCE__
1392 errno = 0;
1393 #endif
1394
1395 wxChar *end;
1396 *val = (*func)(start, &end, base);
1397
1398 // return true only if scan was stopped by the terminating NUL and if the
1399 // string was not empty to start with and no under/overflow occurred
1400 return !*end && (end != start)
1401 #ifndef __WXWINCE__
1402 && (errno != ERANGE)
1403 #endif
1404 ;
1405 }
1406
1407 bool wxString::ToLong(long *val, int base) const
1408 {
1409 return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtol);
1410 }
1411
1412 bool wxString::ToULong(unsigned long *val, int base) const
1413 {
1414 return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtoul);
1415 }
1416
1417 bool wxString::ToLongLong(wxLongLong_t *val, int base) const
1418 {
1419 return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtoll);
1420 }
1421
1422 bool wxString::ToULongLong(wxULongLong_t *val, int base) const
1423 {
1424 return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtoull);
1425 }
1426
1427 bool wxString::ToDouble(double *val) const
1428 {
1429 wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") );
1430
1431 #ifndef __WXWINCE__
1432 errno = 0;
1433 #endif
1434
1435 const wxChar *start = c_str();
1436 wxChar *end;
1437 *val = wxStrtod(start, &end);
1438
1439 // return true only if scan was stopped by the terminating NUL and if the
1440 // string was not empty to start with and no under/overflow occurred
1441 return !*end && (end != start)
1442 #ifndef __WXWINCE__
1443 && (errno != ERANGE)
1444 #endif
1445 ;
1446 }
1447
1448 // ---------------------------------------------------------------------------
1449 // formatted output
1450 // ---------------------------------------------------------------------------
1451
1452 #if !wxUSE_UTF8_LOCALE_ONLY
1453 /* static */
1454 #ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
1455 wxString wxStringPrintfMixinBase::DoFormatWchar(const wxChar *format, ...)
1456 #else
1457 wxString wxString::DoFormatWchar(const wxChar *format, ...)
1458 #endif
1459 {
1460 va_list argptr;
1461 va_start(argptr, format);
1462
1463 wxString s;
1464 s.PrintfV(format, argptr);
1465
1466 va_end(argptr);
1467
1468 return s;
1469 }
1470 #endif // !wxUSE_UTF8_LOCALE_ONLY
1471
1472 #if wxUSE_UNICODE_UTF8
1473 /* static */
1474 wxString wxString::DoFormatUtf8(const char *format, ...)
1475 {
1476 va_list argptr;
1477 va_start(argptr, format);
1478
1479 wxString s;
1480 s.PrintfV(format, argptr);
1481
1482 va_end(argptr);
1483
1484 return s;
1485 }
1486 #endif // wxUSE_UNICODE_UTF8
1487
1488 /* static */
1489 wxString wxString::FormatV(const wxString& format, va_list argptr)
1490 {
1491 wxString s;
1492 s.PrintfV(format, argptr);
1493 return s;
1494 }
1495
1496 #if !wxUSE_UTF8_LOCALE_ONLY
1497 #ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
1498 int wxStringPrintfMixinBase::DoPrintfWchar(const wxChar *format, ...)
1499 #else
1500 int wxString::DoPrintfWchar(const wxChar *format, ...)
1501 #endif
1502 {
1503 va_list argptr;
1504 va_start(argptr, format);
1505
1506 #ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
1507 // get a pointer to the wxString instance; we have to use dynamic_cast<>
1508 // because it's the only cast that works safely for downcasting when
1509 // multiple inheritance is used:
1510 wxString *str = static_cast<wxString*>(this);
1511 #else
1512 wxString *str = this;
1513 #endif
1514
1515 int iLen = str->PrintfV(format, argptr);
1516
1517 va_end(argptr);
1518
1519 return iLen;
1520 }
1521 #endif // !wxUSE_UTF8_LOCALE_ONLY
1522
1523 #if wxUSE_UNICODE_UTF8
1524 int wxString::DoPrintfUtf8(const char *format, ...)
1525 {
1526 va_list argptr;
1527 va_start(argptr, format);
1528
1529 int iLen = PrintfV(format, argptr);
1530
1531 va_end(argptr);
1532
1533 return iLen;
1534 }
1535 #endif // wxUSE_UNICODE_UTF8
1536
1537 #if wxUSE_UNICODE_UTF8
1538 template<typename BufferType>
1539 #else
1540 // we only need one version in non-UTF8 builds and at least two Windows
1541 // compilers have problems with this function template, so use just one
1542 // normal function here
1543 #endif
1544 static int DoStringPrintfV(wxString& str,
1545 const wxString& format, va_list argptr)
1546 {
1547 int size = 1024;
1548
1549 for ( ;; )
1550 {
1551 #if wxUSE_UNICODE_UTF8
1552 BufferType tmp(str, size + 1);
1553 typename BufferType::CharType *buf = tmp;
1554 #else
1555 wxStringBuffer tmp(str, size + 1);
1556 wxChar *buf = tmp;
1557 #endif
1558
1559 if ( !buf )
1560 {
1561 // out of memory
1562 return -1;
1563 }
1564
1565 // wxVsnprintf() may modify the original arg pointer, so pass it
1566 // only a copy
1567 va_list argptrcopy;
1568 wxVaCopy(argptrcopy, argptr);
1569 int len = wxVsnprintf(buf, size, format, argptrcopy);
1570 va_end(argptrcopy);
1571
1572 // some implementations of vsnprintf() don't NUL terminate
1573 // the string if there is not enough space for it so
1574 // always do it manually
1575 buf[size] = _T('\0');
1576
1577 // vsnprintf() may return either -1 (traditional Unix behaviour) or the
1578 // total number of characters which would have been written if the
1579 // buffer were large enough (newer standards such as Unix98)
1580 if ( len < 0 )
1581 {
1582 #if wxUSE_WXVSNPRINTF
1583 // we know that our own implementation of wxVsnprintf() returns -1
1584 // only for a format error - thus there's something wrong with
1585 // the user's format string
1586 return -1;
1587 #else // assume that system version only returns error if not enough space
1588 // still not enough, as we don't know how much we need, double the
1589 // current size of the buffer
1590 size *= 2;
1591 #endif // wxUSE_WXVSNPRINTF/!wxUSE_WXVSNPRINTF
1592 }
1593 else if ( len >= size )
1594 {
1595 #if wxUSE_WXVSNPRINTF
1596 // we know that our own implementation of wxVsnprintf() returns
1597 // size+1 when there's not enough space but that's not the size
1598 // of the required buffer!
1599 size *= 2; // so we just double the current size of the buffer
1600 #else
1601 // some vsnprintf() implementations NUL-terminate the buffer and
1602 // some don't in len == size case, to be safe always add 1
1603 size = len + 1;
1604 #endif
1605 }
1606 else // ok, there was enough space
1607 {
1608 break;
1609 }
1610 }
1611
1612 // we could have overshot
1613 str.Shrink();
1614
1615 return str.length();
1616 }
1617
1618 int wxString::PrintfV(const wxString& format, va_list argptr)
1619 {
1620 #if wxUSE_UNICODE_UTF8
1621 #if wxUSE_STL_BASED_WXSTRING
1622 typedef wxStringTypeBuffer<char> Utf8Buffer;
1623 #else
1624 typedef wxImplStringBuffer Utf8Buffer;
1625 #endif
1626 #endif
1627
1628 #if wxUSE_UTF8_LOCALE_ONLY
1629 return DoStringPrintfV<Utf8Buffer>(*this, format, argptr);
1630 #else
1631 #if wxUSE_UNICODE_UTF8
1632 if ( wxLocaleIsUtf8 )
1633 return DoStringPrintfV<Utf8Buffer>(*this, format, argptr);
1634 else
1635 // wxChar* version
1636 return DoStringPrintfV<wxStringBuffer>(*this, format, argptr);
1637 #else
1638 return DoStringPrintfV(*this, format, argptr);
1639 #endif // UTF8/WCHAR
1640 #endif
1641 }
1642
1643 // ----------------------------------------------------------------------------
1644 // misc other operations
1645 // ----------------------------------------------------------------------------
1646
1647 // returns true if the string matches the pattern which may contain '*' and
1648 // '?' metacharacters (as usual, '?' matches any character and '*' any number
1649 // of them)
1650 bool wxString::Matches(const wxString& mask) const
1651 {
1652 // I disable this code as it doesn't seem to be faster (in fact, it seems
1653 // to be much slower) than the old, hand-written code below and using it
1654 // here requires always linking with libregex even if the user code doesn't
1655 // use it
1656 #if 0 // wxUSE_REGEX
1657 // first translate the shell-like mask into a regex
1658 wxString pattern;
1659 pattern.reserve(wxStrlen(pszMask));
1660
1661 pattern += _T('^');
1662 while ( *pszMask )
1663 {
1664 switch ( *pszMask )
1665 {
1666 case _T('?'):
1667 pattern += _T('.');
1668 break;
1669
1670 case _T('*'):
1671 pattern += _T(".*");
1672 break;
1673
1674 case _T('^'):
1675 case _T('.'):
1676 case _T('$'):
1677 case _T('('):
1678 case _T(')'):
1679 case _T('|'):
1680 case _T('+'):
1681 case _T('\\'):
1682 // these characters are special in a RE, quote them
1683 // (however note that we don't quote '[' and ']' to allow
1684 // using them for Unix shell like matching)
1685 pattern += _T('\\');
1686 // fall through
1687
1688 default:
1689 pattern += *pszMask;
1690 }
1691
1692 pszMask++;
1693 }
1694 pattern += _T('$');
1695
1696 // and now use it
1697 return wxRegEx(pattern, wxRE_NOSUB | wxRE_EXTENDED).Matches(c_str());
1698 #else // !wxUSE_REGEX
1699 // TODO: this is, of course, awfully inefficient...
1700
1701 // FIXME-UTF8: implement using iterators, remove #if
1702 #if wxUSE_UNICODE_UTF8
1703 wxWCharBuffer maskBuf = mask.wc_str();
1704 wxWCharBuffer txtBuf = wc_str();
1705 const wxChar *pszMask = maskBuf.data();
1706 const wxChar *pszTxt = txtBuf.data();
1707 #else
1708 const wxChar *pszMask = mask.wx_str();
1709 // the char currently being checked
1710 const wxChar *pszTxt = wx_str();
1711 #endif
1712
1713 // the last location where '*' matched
1714 const wxChar *pszLastStarInText = NULL;
1715 const wxChar *pszLastStarInMask = NULL;
1716
1717 match:
1718 for ( ; *pszMask != wxT('\0'); pszMask++, pszTxt++ ) {
1719 switch ( *pszMask ) {
1720 case wxT('?'):
1721 if ( *pszTxt == wxT('\0') )
1722 return false;
1723
1724 // pszTxt and pszMask will be incremented in the loop statement
1725
1726 break;
1727
1728 case wxT('*'):
1729 {
1730 // remember where we started to be able to backtrack later
1731 pszLastStarInText = pszTxt;
1732 pszLastStarInMask = pszMask;
1733
1734 // ignore special chars immediately following this one
1735 // (should this be an error?)
1736 while ( *pszMask == wxT('*') || *pszMask == wxT('?') )
1737 pszMask++;
1738
1739 // if there is nothing more, match
1740 if ( *pszMask == wxT('\0') )
1741 return true;
1742
1743 // are there any other metacharacters in the mask?
1744 size_t uiLenMask;
1745 const wxChar *pEndMask = wxStrpbrk(pszMask, wxT("*?"));
1746
1747 if ( pEndMask != NULL ) {
1748 // we have to match the string between two metachars
1749 uiLenMask = pEndMask - pszMask;
1750 }
1751 else {
1752 // we have to match the remainder of the string
1753 uiLenMask = wxStrlen(pszMask);
1754 }
1755
1756 wxString strToMatch(pszMask, uiLenMask);
1757 const wxChar* pMatch = wxStrstr(pszTxt, strToMatch);
1758 if ( pMatch == NULL )
1759 return false;
1760
1761 // -1 to compensate "++" in the loop
1762 pszTxt = pMatch + uiLenMask - 1;
1763 pszMask += uiLenMask - 1;
1764 }
1765 break;
1766
1767 default:
1768 if ( *pszMask != *pszTxt )
1769 return false;
1770 break;
1771 }
1772 }
1773
1774 // match only if nothing left
1775 if ( *pszTxt == wxT('\0') )
1776 return true;
1777
1778 // if we failed to match, backtrack if we can
1779 if ( pszLastStarInText ) {
1780 pszTxt = pszLastStarInText + 1;
1781 pszMask = pszLastStarInMask;
1782
1783 pszLastStarInText = NULL;
1784
1785 // don't bother resetting pszLastStarInMask, it's unnecessary
1786
1787 goto match;
1788 }
1789
1790 return false;
1791 #endif // wxUSE_REGEX/!wxUSE_REGEX
1792 }
1793
1794 // Count the number of chars
1795 int wxString::Freq(wxUniChar ch) const
1796 {
1797 int count = 0;
1798 for ( const_iterator i = begin(); i != end(); ++i )
1799 {
1800 if ( *i == ch )
1801 count ++;
1802 }
1803 return count;
1804 }
1805
1806 // convert to upper case, return the copy of the string
1807 wxString wxString::Upper() const
1808 { wxString s(*this); return s.MakeUpper(); }
1809
1810 // convert to lower case, return the copy of the string
1811 wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
wxWidgets (Impactor)