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[wxWidgets.git] / src / common / string.cpp
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 bool wxString::IsSameAs(wxUniChar c, bool compareWithCase) const
569 {
570 return (length() == 1) && (compareWithCase ? GetChar(0u) == c
571 : wxToupper(GetChar(0u)) == wxToupper(c));
572 }
573
574 #ifdef HAVE_STD_STRING_COMPARE
575
576 // NB: Comparison code (both if HAVE_STD_STRING_COMPARE and if not) works with
577 // UTF-8 encoded strings too, thanks to UTF-8's design which allows us to
578 // sort strings in characters code point order by sorting the byte sequence
579 // in byte values order (i.e. what strcmp() and memcmp() do).
580
581 int wxString::compare(const wxString& str) const
582 {
583 return m_impl.compare(str.m_impl);
584 }
585
586 int wxString::compare(size_t nStart, size_t nLen,
587 const wxString& str) const
588 {
589 size_t pos, len;
590 PosLenToImpl(nStart, nLen, &pos, &len);
591 return m_impl.compare(pos, len, str.m_impl);
592 }
593
594 int wxString::compare(size_t nStart, size_t nLen,
595 const wxString& str,
596 size_t nStart2, size_t nLen2) const
597 {
598 size_t pos, len;
599 PosLenToImpl(nStart, nLen, &pos, &len);
600
601 size_t pos2, len2;
602 str.PosLenToImpl(nStart2, nLen2, &pos2, &len2);
603
604 return m_impl.compare(pos, len, str.m_impl, pos2, len2);
605 }
606
607 int wxString::compare(const char* sz) const
608 {
609 return m_impl.compare(ImplStr(sz));
610 }
611
612 int wxString::compare(const wchar_t* sz) const
613 {
614 return m_impl.compare(ImplStr(sz));
615 }
616
617 int wxString::compare(size_t nStart, size_t nLen,
618 const char* sz, size_t nCount) const
619 {
620 size_t pos, len;
621 PosLenToImpl(nStart, nLen, &pos, &len);
622
623 SubstrBufFromMB str(ImplStr(sz, nCount));
624
625 return m_impl.compare(pos, len, str.data, str.len);
626 }
627
628 int wxString::compare(size_t nStart, size_t nLen,
629 const wchar_t* sz, size_t nCount) const
630 {
631 size_t pos, len;
632 PosLenToImpl(nStart, nLen, &pos, &len);
633
634 SubstrBufFromWC str(ImplStr(sz, nCount));
635
636 return m_impl.compare(pos, len, str.data, str.len);
637 }
638
639 #else // !HAVE_STD_STRING_COMPARE
640
641 static inline int wxDoCmp(const wxStringCharType* s1, size_t l1,
642 const wxStringCharType* s2, size_t l2)
643 {
644 if( l1 == l2 )
645 return wxStringMemcmp(s1, s2, l1);
646 else if( l1 < l2 )
647 {
648 int ret = wxStringMemcmp(s1, s2, l1);
649 return ret == 0 ? -1 : ret;
650 }
651 else
652 {
653 int ret = wxStringMemcmp(s1, s2, l2);
654 return ret == 0 ? +1 : ret;
655 }
656 }
657
658 int wxString::compare(const wxString& str) const
659 {
660 return ::wxDoCmp(m_impl.data(), m_impl.length(),
661 str.m_impl.data(), str.m_impl.length());
662 }
663
664 int wxString::compare(size_t nStart, size_t nLen,
665 const wxString& str) const
666 {
667 wxASSERT(nStart <= length());
668 size_type strLen = length() - nStart;
669 nLen = strLen < nLen ? strLen : nLen;
670
671 size_t pos, len;
672 PosLenToImpl(nStart, nLen, &pos, &len);
673
674 return ::wxDoCmp(m_impl.data() + pos, len,
675 str.m_impl.data(), str.m_impl.length());
676 }
677
678 int wxString::compare(size_t nStart, size_t nLen,
679 const wxString& str,
680 size_t nStart2, size_t nLen2) const
681 {
682 wxASSERT(nStart <= length());
683 wxASSERT(nStart2 <= str.length());
684 size_type strLen = length() - nStart,
685 strLen2 = str.length() - nStart2;
686 nLen = strLen < nLen ? strLen : nLen;
687 nLen2 = strLen2 < nLen2 ? strLen2 : nLen2;
688
689 size_t pos, len;
690 PosLenToImpl(nStart, nLen, &pos, &len);
691 size_t pos2, len2;
692 str.PosLenToImpl(nStart2, nLen2, &pos2, &len2);
693
694 return ::wxDoCmp(m_impl.data() + pos, len,
695 str.m_impl.data() + pos2, len2);
696 }
697
698 int wxString::compare(const char* sz) const
699 {
700 SubstrBufFromMB str(ImplStr(sz, npos));
701 if ( str.len == npos )
702 str.len = wxStringStrlen(str.data);
703 return ::wxDoCmp(m_impl.data(), m_impl.length(), str.data, str.len);
704 }
705
706 int wxString::compare(const wchar_t* sz) const
707 {
708 SubstrBufFromWC str(ImplStr(sz, npos));
709 if ( str.len == npos )
710 str.len = wxStringStrlen(str.data);
711 return ::wxDoCmp(m_impl.data(), m_impl.length(), str.data, str.len);
712 }
713
714 int wxString::compare(size_t nStart, size_t nLen,
715 const char* sz, size_t nCount) const
716 {
717 wxASSERT(nStart <= length());
718 size_type strLen = length() - nStart;
719 nLen = strLen < nLen ? strLen : nLen;
720
721 size_t pos, len;
722 PosLenToImpl(nStart, nLen, &pos, &len);
723
724 SubstrBufFromMB str(ImplStr(sz, nCount));
725 if ( str.len == npos )
726 str.len = wxStringStrlen(str.data);
727
728 return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len);
729 }
730
731 int wxString::compare(size_t nStart, size_t nLen,
732 const wchar_t* sz, size_t nCount) const
733 {
734 wxASSERT(nStart <= length());
735 size_type strLen = length() - nStart;
736 nLen = strLen < nLen ? strLen : nLen;
737
738 size_t pos, len;
739 PosLenToImpl(nStart, nLen, &pos, &len);
740
741 SubstrBufFromWC str(ImplStr(sz, nCount));
742 if ( str.len == npos )
743 str.len = wxStringStrlen(str.data);
744
745 return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len);
746 }
747
748 #endif // HAVE_STD_STRING_COMPARE/!HAVE_STD_STRING_COMPARE
749
750
751 // ---------------------------------------------------------------------------
752 // find_{first,last}_[not]_of functions
753 // ---------------------------------------------------------------------------
754
755 #if !wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8
756
757 // NB: All these functions are implemented with the argument being wxChar*,
758 // i.e. widechar string in any Unicode build, even though native string
759 // representation is char* in the UTF-8 build. This is because we couldn't
760 // use memchr() to determine if a character is in a set encoded as UTF-8.
761
762 size_t wxString::find_first_of(const wxChar* sz, size_t nStart) const
763 {
764 return find_first_of(sz, nStart, wxStrlen(sz));
765 }
766
767 size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart) const
768 {
769 return find_first_not_of(sz, nStart, wxStrlen(sz));
770 }
771
772 size_t wxString::find_first_of(const wxChar* sz, size_t nStart, size_t n) const
773 {
774 wxASSERT_MSG( nStart <= length(), _T("invalid index") );
775
776 size_t idx = nStart;
777 for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i )
778 {
779 if ( wxTmemchr(sz, *i, n) )
780 return idx;
781 }
782
783 return npos;
784 }
785
786 size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart, size_t n) const
787 {
788 wxASSERT_MSG( nStart <= length(), _T("invalid index") );
789
790 size_t idx = nStart;
791 for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i )
792 {
793 if ( !wxTmemchr(sz, *i, n) )
794 return idx;
795 }
796
797 return npos;
798 }
799
800
801 size_t wxString::find_last_of(const wxChar* sz, size_t nStart) const
802 {
803 return find_last_of(sz, nStart, wxStrlen(sz));
804 }
805
806 size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart) const
807 {
808 return find_last_not_of(sz, nStart, wxStrlen(sz));
809 }
810
811 size_t wxString::find_last_of(const wxChar* sz, size_t nStart, size_t n) const
812 {
813 size_t len = length();
814
815 if ( nStart == npos )
816 {
817 nStart = len - 1;
818 }
819 else
820 {
821 wxASSERT_MSG( nStart <= len, _T("invalid index") );
822 }
823
824 size_t idx = nStart;
825 for ( const_reverse_iterator i = rbegin() + (len - nStart - 1);
826 i != rend(); --idx, ++i )
827 {
828 if ( wxTmemchr(sz, *i, n) )
829 return idx;
830 }
831
832 return npos;
833 }
834
835 size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart, size_t n) const
836 {
837 size_t len = length();
838
839 if ( nStart == npos )
840 {
841 nStart = len - 1;
842 }
843 else
844 {
845 wxASSERT_MSG( nStart <= len, _T("invalid index") );
846 }
847
848 size_t idx = nStart;
849 for ( const_reverse_iterator i = rbegin() + (len - nStart - 1);
850 i != rend(); --idx, ++i )
851 {
852 if ( !wxTmemchr(sz, *i, n) )
853 return idx;
854 }
855
856 return npos;
857 }
858
859 size_t wxString::find_first_not_of(wxUniChar ch, size_t nStart) const
860 {
861 wxASSERT_MSG( nStart <= length(), _T("invalid index") );
862
863 size_t idx = nStart;
864 for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i )
865 {
866 if ( *i != ch )
867 return idx;
868 }
869
870 return npos;
871 }
872
873 size_t wxString::find_last_not_of(wxUniChar ch, size_t nStart) const
874 {
875 size_t len = length();
876
877 if ( nStart == npos )
878 {
879 nStart = len - 1;
880 }
881 else
882 {
883 wxASSERT_MSG( nStart <= len, _T("invalid index") );
884 }
885
886 size_t idx = nStart;
887 for ( const_reverse_iterator i = rbegin() + (len - nStart - 1);
888 i != rend(); --idx, ++i )
889 {
890 if ( *i != ch )
891 return idx;
892 }
893
894 return npos;
895 }
896
897 // the functions above were implemented for wchar_t* arguments in Unicode
898 // build and char* in ANSI build; below are implementations for the other
899 // version:
900 #if wxUSE_UNICODE
901 #define wxOtherCharType char
902 #define STRCONV (const wxChar*)wxConvLibc.cMB2WC
903 #else
904 #define wxOtherCharType wchar_t
905 #define STRCONV (const wxChar*)wxConvLibc.cWC2MB
906 #endif
907
908 size_t wxString::find_first_of(const wxOtherCharType* sz, size_t nStart) const
909 { return find_first_of(STRCONV(sz), nStart); }
910
911 size_t wxString::find_first_of(const wxOtherCharType* sz, size_t nStart,
912 size_t n) const
913 { return find_first_of(STRCONV(sz, n, NULL), nStart, n); }
914 size_t wxString::find_last_of(const wxOtherCharType* sz, size_t nStart) const
915 { return find_last_of(STRCONV(sz), nStart); }
916 size_t wxString::find_last_of(const wxOtherCharType* sz, size_t nStart,
917 size_t n) const
918 { return find_last_of(STRCONV(sz, n, NULL), nStart, n); }
919 size_t wxString::find_first_not_of(const wxOtherCharType* sz, size_t nStart) const
920 { return find_first_not_of(STRCONV(sz), nStart); }
921 size_t wxString::find_first_not_of(const wxOtherCharType* sz, size_t nStart,
922 size_t n) const
923 { return find_first_not_of(STRCONV(sz, n, NULL), nStart, n); }
924 size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart) const
925 { return find_last_not_of(STRCONV(sz), nStart); }
926 size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart,
927 size_t n) const
928 { return find_last_not_of(STRCONV(sz, n, NULL), nStart, n); }
929
930 #undef wxOtherCharType
931 #undef STRCONV
932
933 #endif // !wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8
934
935 // ===========================================================================
936 // other common string functions
937 // ===========================================================================
938
939 int wxString::CmpNoCase(const wxString& s) const
940 {
941 // FIXME-UTF8: use wxUniChar::ToLower/ToUpper once added
942
943 size_t idx = 0;
944 const_iterator i1 = begin();
945 const_iterator end1 = end();
946 const_iterator i2 = s.begin();
947 const_iterator end2 = s.end();
948
949 for ( ; i1 != end1 && i2 != end2; ++idx, ++i1, ++i2 )
950 {
951 wxUniChar lower1 = (wxChar)wxTolower(*i1);
952 wxUniChar lower2 = (wxChar)wxTolower(*i2);
953 if ( lower1 != lower2 )
954 return lower1 < lower2 ? -1 : 1;
955 }
956
957 size_t len1 = length();
958 size_t len2 = s.length();
959
960 if ( len1 < len2 )
961 return -1;
962 else if ( len1 > len2 )
963 return 1;
964 return 0;
965 }
966
967
968 #if wxUSE_UNICODE
969
970 #ifdef __MWERKS__
971 #ifndef __SCHAR_MAX__
972 #define __SCHAR_MAX__ 127
973 #endif
974 #endif
975
976 wxString wxString::FromAscii(const char *ascii, size_t len)
977 {
978 if (!ascii || len == 0)
979 return wxEmptyString;
980
981 wxString res;
982
983 {
984 wxImplStringBuffer buf(res, len);
985 wxStringCharType *dest = buf;
986
987 for ( ; len > 0; --len )
988 {
989 unsigned char c = (unsigned char)*ascii++;
990 wxASSERT_MSG( c < 0x80,
991 _T("Non-ASCII value passed to FromAscii().") );
992
993 *dest++ = (wchar_t)c;
994 }
995 }
996
997 return res;
998 }
999
1000 wxString wxString::FromAscii(const char *ascii)
1001 {
1002 return FromAscii(ascii, wxStrlen(ascii));
1003 }
1004
1005 wxString wxString::FromAscii(const char ascii)
1006 {
1007 // What do we do with '\0' ?
1008
1009 unsigned char c = (unsigned char)ascii;
1010
1011 wxASSERT_MSG( c < 0x80, _T("Non-ASCII value passed to FromAscii().") );
1012
1013 // NB: the cast to wchar_t causes interpretation of 'ascii' as Latin1 value
1014 return wxString(wxUniChar((wchar_t)c));
1015 }
1016
1017 const wxCharBuffer wxString::ToAscii() const
1018 {
1019 // this will allocate enough space for the terminating NUL too
1020 wxCharBuffer buffer(length());
1021 char *dest = buffer.data();
1022
1023 for ( const_iterator i = begin(); i != end(); ++i )
1024 {
1025 wxUniChar c(*i);
1026 // FIXME-UTF8: unify substituted char ('_') with wxUniChar ('?')
1027 *dest++ = c.IsAscii() ? (char)c : '_';
1028
1029 // the output string can't have embedded NULs anyhow, so we can safely
1030 // stop at first of them even if we do have any
1031 if ( !c )
1032 break;
1033 }
1034
1035 return buffer;
1036 }
1037
1038 #endif // wxUSE_UNICODE
1039
1040 // extract string of length nCount starting at nFirst
1041 wxString wxString::Mid(size_t nFirst, size_t nCount) const
1042 {
1043 size_t nLen = length();
1044
1045 // default value of nCount is npos and means "till the end"
1046 if ( nCount == npos )
1047 {
1048 nCount = nLen - nFirst;
1049 }
1050
1051 // out-of-bounds requests return sensible things
1052 if ( nFirst + nCount > nLen )
1053 {
1054 nCount = nLen - nFirst;
1055 }
1056
1057 if ( nFirst > nLen )
1058 {
1059 // AllocCopy() will return empty string
1060 return wxEmptyString;
1061 }
1062
1063 wxString dest(*this, nFirst, nCount);
1064 if ( dest.length() != nCount )
1065 {
1066 wxFAIL_MSG( _T("out of memory in wxString::Mid") );
1067 }
1068
1069 return dest;
1070 }
1071
1072 // check that the string starts with prefix and return the rest of the string
1073 // in the provided pointer if it is not NULL, otherwise return false
1074 bool wxString::StartsWith(const wxString& prefix, wxString *rest) const
1075 {
1076 if ( compare(0, prefix.length(), prefix) != 0 )
1077 return false;
1078
1079 if ( rest )
1080 {
1081 // put the rest of the string into provided pointer
1082 rest->assign(*this, prefix.length(), npos);
1083 }
1084
1085 return true;
1086 }
1087
1088
1089 // check that the string ends with suffix and return the rest of it in the
1090 // provided pointer if it is not NULL, otherwise return false
1091 bool wxString::EndsWith(const wxString& suffix, wxString *rest) const
1092 {
1093 int start = length() - suffix.length();
1094
1095 if ( start < 0 || compare(start, npos, suffix) != 0 )
1096 return false;
1097
1098 if ( rest )
1099 {
1100 // put the rest of the string into provided pointer
1101 rest->assign(*this, 0, start);
1102 }
1103
1104 return true;
1105 }
1106
1107
1108 // extract nCount last (rightmost) characters
1109 wxString wxString::Right(size_t nCount) const
1110 {
1111 if ( nCount > length() )
1112 nCount = length();
1113
1114 wxString dest(*this, length() - nCount, nCount);
1115 if ( dest.length() != nCount ) {
1116 wxFAIL_MSG( _T("out of memory in wxString::Right") );
1117 }
1118 return dest;
1119 }
1120
1121 // get all characters after the last occurence of ch
1122 // (returns the whole string if ch not found)
1123 wxString wxString::AfterLast(wxUniChar ch) const
1124 {
1125 wxString str;
1126 int iPos = Find(ch, true);
1127 if ( iPos == wxNOT_FOUND )
1128 str = *this;
1129 else
1130 str = wx_str() + iPos + 1;
1131
1132 return str;
1133 }
1134
1135 // extract nCount first (leftmost) characters
1136 wxString wxString::Left(size_t nCount) const
1137 {
1138 if ( nCount > length() )
1139 nCount = length();
1140
1141 wxString dest(*this, 0, nCount);
1142 if ( dest.length() != nCount ) {
1143 wxFAIL_MSG( _T("out of memory in wxString::Left") );
1144 }
1145 return dest;
1146 }
1147
1148 // get all characters before the first occurence of ch
1149 // (returns the whole string if ch not found)
1150 wxString wxString::BeforeFirst(wxUniChar ch) const
1151 {
1152 int iPos = Find(ch);
1153 if ( iPos == wxNOT_FOUND ) iPos = length();
1154 return wxString(*this, 0, iPos);
1155 }
1156
1157 /// get all characters before the last occurence of ch
1158 /// (returns empty string if ch not found)
1159 wxString wxString::BeforeLast(wxUniChar ch) const
1160 {
1161 wxString str;
1162 int iPos = Find(ch, true);
1163 if ( iPos != wxNOT_FOUND && iPos != 0 )
1164 str = wxString(c_str(), iPos);
1165
1166 return str;
1167 }
1168
1169 /// get all characters after the first occurence of ch
1170 /// (returns empty string if ch not found)
1171 wxString wxString::AfterFirst(wxUniChar ch) const
1172 {
1173 wxString str;
1174 int iPos = Find(ch);
1175 if ( iPos != wxNOT_FOUND )
1176 str = wx_str() + iPos + 1;
1177
1178 return str;
1179 }
1180
1181 // replace first (or all) occurences of some substring with another one
1182 size_t wxString::Replace(const wxString& strOld,
1183 const wxString& strNew, bool bReplaceAll)
1184 {
1185 // if we tried to replace an empty string we'd enter an infinite loop below
1186 wxCHECK_MSG( !strOld.empty(), 0,
1187 _T("wxString::Replace(): invalid parameter") );
1188
1189 size_t uiCount = 0; // count of replacements made
1190
1191 size_t uiOldLen = strOld.length();
1192 size_t uiNewLen = strNew.length();
1193
1194 size_t dwPos = 0;
1195
1196 while ( (*this)[dwPos] != wxT('\0') )
1197 {
1198 //DO NOT USE STRSTR HERE
1199 //this string can contain embedded null characters,
1200 //so strstr will function incorrectly
1201 dwPos = find(strOld, dwPos);
1202 if ( dwPos == npos )
1203 break; // exit the loop
1204 else
1205 {
1206 //replace this occurance of the old string with the new one
1207 replace(dwPos, uiOldLen, strNew, uiNewLen);
1208
1209 //move up pos past the string that was replaced
1210 dwPos += uiNewLen;
1211
1212 //increase replace count
1213 ++uiCount;
1214
1215 // stop now?
1216 if ( !bReplaceAll )
1217 break; // exit the loop
1218 }
1219 }
1220
1221 return uiCount;
1222 }
1223
1224 bool wxString::IsAscii() const
1225 {
1226 for ( const_iterator i = begin(); i != end(); ++i )
1227 {
1228 if ( !(*i).IsAscii() )
1229 return false;
1230 }
1231
1232 return true;
1233 }
1234
1235 bool wxString::IsWord() const
1236 {
1237 for ( const_iterator i = begin(); i != end(); ++i )
1238 {
1239 if ( !wxIsalpha(*i) )
1240 return false;
1241 }
1242
1243 return true;
1244 }
1245
1246 bool wxString::IsNumber() const
1247 {
1248 if ( empty() )
1249 return true;
1250
1251 const_iterator i = begin();
1252
1253 if ( *i == _T('-') || *i == _T('+') )
1254 ++i;
1255
1256 for ( ; i != end(); ++i )
1257 {
1258 if ( !wxIsdigit(*i) )
1259 return false;
1260 }
1261
1262 return true;
1263 }
1264
1265 wxString wxString::Strip(stripType w) const
1266 {
1267 wxString s = *this;
1268 if ( w & leading ) s.Trim(false);
1269 if ( w & trailing ) s.Trim(true);
1270 return s;
1271 }
1272
1273 // ---------------------------------------------------------------------------
1274 // case conversion
1275 // ---------------------------------------------------------------------------
1276
1277 wxString& wxString::MakeUpper()
1278 {
1279 for ( iterator it = begin(), en = end(); it != en; ++it )
1280 *it = (wxChar)wxToupper(*it);
1281
1282 return *this;
1283 }
1284
1285 wxString& wxString::MakeLower()
1286 {
1287 for ( iterator it = begin(), en = end(); it != en; ++it )
1288 *it = (wxChar)wxTolower(*it);
1289
1290 return *this;
1291 }
1292
1293 // ---------------------------------------------------------------------------
1294 // trimming and padding
1295 // ---------------------------------------------------------------------------
1296
1297 // some compilers (VC++ 6.0 not to name them) return true for a call to
1298 // isspace('ê') in the C locale which seems to be broken to me, but we have to
1299 // live with this by checking that the character is a 7 bit one - even if this
1300 // may fail to detect some spaces (I don't know if Unicode doesn't have
1301 // space-like symbols somewhere except in the first 128 chars), it is arguably
1302 // still better than trimming away accented letters
1303 inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); }
1304
1305 // trims spaces (in the sense of isspace) from left or right side
1306 wxString& wxString::Trim(bool bFromRight)
1307 {
1308 // first check if we're going to modify the string at all
1309 if ( !empty() &&
1310 (
1311 (bFromRight && wxSafeIsspace(GetChar(length() - 1))) ||
1312 (!bFromRight && wxSafeIsspace(GetChar(0u)))
1313 )
1314 )
1315 {
1316 if ( bFromRight )
1317 {
1318 // find last non-space character
1319 reverse_iterator psz = rbegin();
1320 while ( (psz != rend()) && wxSafeIsspace(*psz) )
1321 psz++;
1322
1323 // truncate at trailing space start
1324 erase(psz.base(), end());
1325 }
1326 else
1327 {
1328 // find first non-space character
1329 iterator psz = begin();
1330 while ( (psz != end()) && wxSafeIsspace(*psz) )
1331 psz++;
1332
1333 // fix up data and length
1334 erase(begin(), psz);
1335 }
1336 }
1337
1338 return *this;
1339 }
1340
1341 // adds nCount characters chPad to the string from either side
1342 wxString& wxString::Pad(size_t nCount, wxUniChar chPad, bool bFromRight)
1343 {
1344 wxString s(chPad, nCount);
1345
1346 if ( bFromRight )
1347 *this += s;
1348 else
1349 {
1350 s += *this;
1351 swap(s);
1352 }
1353
1354 return *this;
1355 }
1356
1357 // truncate the string
1358 wxString& wxString::Truncate(size_t uiLen)
1359 {
1360 if ( uiLen < length() )
1361 {
1362 erase(begin() + uiLen, end());
1363 }
1364 //else: nothing to do, string is already short enough
1365
1366 return *this;
1367 }
1368
1369 // ---------------------------------------------------------------------------
1370 // finding (return wxNOT_FOUND if not found and index otherwise)
1371 // ---------------------------------------------------------------------------
1372
1373 // find a character
1374 int wxString::Find(wxUniChar ch, bool bFromEnd) const
1375 {
1376 size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch);
1377
1378 return (idx == npos) ? wxNOT_FOUND : (int)idx;
1379 }
1380
1381 // ----------------------------------------------------------------------------
1382 // conversion to numbers
1383 // ----------------------------------------------------------------------------
1384
1385 // The implementation of all the functions below is exactly the same so factor
1386 // it out. Note that number extraction works correctly on UTF-8 strings, so
1387 // we can use wxStringCharType and wx_str() for maximum efficiency.
1388
1389 template <typename T>
1390 bool wxStringToIntType(const wxStringCharType *start,
1391 T *val,
1392 int base,
1393 T (*func)(const wxStringCharType*, wxStringCharType**, int))
1394 {
1395 wxCHECK_MSG( val, false, _T("NULL output pointer") );
1396 wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
1397
1398 #ifndef __WXWINCE__
1399 errno = 0;
1400 #endif
1401
1402 wxStringCharType *end;
1403 *val = (*func)(start, &end, base);
1404
1405 // return true only if scan was stopped by the terminating NUL and if the
1406 // string was not empty to start with and no under/overflow occurred
1407 return !*end && (end != start)
1408 #ifndef __WXWINCE__
1409 && (errno != ERANGE)
1410 #endif
1411 ;
1412 }
1413
1414 bool wxString::ToLong(long *val, int base) const
1415 {
1416 return wxStringToIntType(wx_str(), val, base, wxStrtol);
1417 }
1418
1419 bool wxString::ToULong(unsigned long *val, int base) const
1420 {
1421 return wxStringToIntType(wx_str(), val, base, wxStrtoul);
1422 }
1423
1424 bool wxString::ToLongLong(wxLongLong_t *val, int base) const
1425 {
1426 return wxStringToIntType(wx_str(), val, base, wxStrtoll);
1427 }
1428
1429 bool wxString::ToULongLong(wxULongLong_t *val, int base) const
1430 {
1431 return wxStringToIntType(wx_str(), val, base, wxStrtoull);
1432 }
1433
1434 bool wxString::ToDouble(double *val) const
1435 {
1436 wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") );
1437
1438 #ifndef __WXWINCE__
1439 errno = 0;
1440 #endif
1441
1442 const wxChar *start = c_str();
1443 wxChar *end;
1444 *val = wxStrtod(start, &end);
1445
1446 // return true only if scan was stopped by the terminating NUL and if the
1447 // string was not empty to start with and no under/overflow occurred
1448 return !*end && (end != start)
1449 #ifndef __WXWINCE__
1450 && (errno != ERANGE)
1451 #endif
1452 ;
1453 }
1454
1455 // ---------------------------------------------------------------------------
1456 // formatted output
1457 // ---------------------------------------------------------------------------
1458
1459 #if !wxUSE_UTF8_LOCALE_ONLY
1460 /* static */
1461 #ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
1462 wxString wxStringPrintfMixinBase::DoFormatWchar(const wxChar *format, ...)
1463 #else
1464 wxString wxString::DoFormatWchar(const wxChar *format, ...)
1465 #endif
1466 {
1467 va_list argptr;
1468 va_start(argptr, format);
1469
1470 wxString s;
1471 s.PrintfV(format, argptr);
1472
1473 va_end(argptr);
1474
1475 return s;
1476 }
1477 #endif // !wxUSE_UTF8_LOCALE_ONLY
1478
1479 #if wxUSE_UNICODE_UTF8
1480 /* static */
1481 wxString wxString::DoFormatUtf8(const char *format, ...)
1482 {
1483 va_list argptr;
1484 va_start(argptr, format);
1485
1486 wxString s;
1487 s.PrintfV(format, argptr);
1488
1489 va_end(argptr);
1490
1491 return s;
1492 }
1493 #endif // wxUSE_UNICODE_UTF8
1494
1495 /* static */
1496 wxString wxString::FormatV(const wxString& format, va_list argptr)
1497 {
1498 wxString s;
1499 s.PrintfV(format, argptr);
1500 return s;
1501 }
1502
1503 #if !wxUSE_UTF8_LOCALE_ONLY
1504 #ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
1505 int wxStringPrintfMixinBase::DoPrintfWchar(const wxChar *format, ...)
1506 #else
1507 int wxString::DoPrintfWchar(const wxChar *format, ...)
1508 #endif
1509 {
1510 va_list argptr;
1511 va_start(argptr, format);
1512
1513 #ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
1514 // get a pointer to the wxString instance; we have to use dynamic_cast<>
1515 // because it's the only cast that works safely for downcasting when
1516 // multiple inheritance is used:
1517 wxString *str = static_cast<wxString*>(this);
1518 #else
1519 wxString *str = this;
1520 #endif
1521
1522 int iLen = str->PrintfV(format, argptr);
1523
1524 va_end(argptr);
1525
1526 return iLen;
1527 }
1528 #endif // !wxUSE_UTF8_LOCALE_ONLY
1529
1530 #if wxUSE_UNICODE_UTF8
1531 int wxString::DoPrintfUtf8(const char *format, ...)
1532 {
1533 va_list argptr;
1534 va_start(argptr, format);
1535
1536 int iLen = PrintfV(format, argptr);
1537
1538 va_end(argptr);
1539
1540 return iLen;
1541 }
1542 #endif // wxUSE_UNICODE_UTF8
1543
1544 #if wxUSE_UNICODE_UTF8
1545 template<typename BufferType>
1546 #else
1547 // we only need one version in non-UTF8 builds and at least two Windows
1548 // compilers have problems with this function template, so use just one
1549 // normal function here
1550 #endif
1551 static int DoStringPrintfV(wxString& str,
1552 const wxString& format, va_list argptr)
1553 {
1554 int size = 1024;
1555
1556 for ( ;; )
1557 {
1558 #if wxUSE_UNICODE_UTF8
1559 BufferType tmp(str, size + 1);
1560 typename BufferType::CharType *buf = tmp;
1561 #else
1562 wxStringBuffer tmp(str, size + 1);
1563 wxChar *buf = tmp;
1564 #endif
1565
1566 if ( !buf )
1567 {
1568 // out of memory
1569
1570 // in UTF-8 build, leaving uninitialized junk in the buffer
1571 // could result in invalid non-empty UTF-8 string, so just
1572 // reset the string to empty on failure:
1573 buf[0] = '\0';
1574 return -1;
1575 }
1576
1577 // wxVsnprintf() may modify the original arg pointer, so pass it
1578 // only a copy
1579 va_list argptrcopy;
1580 wxVaCopy(argptrcopy, argptr);
1581 int len = wxVsnprintf(buf, size, format, argptrcopy);
1582 va_end(argptrcopy);
1583
1584 // some implementations of vsnprintf() don't NUL terminate
1585 // the string if there is not enough space for it so
1586 // always do it manually
1587 buf[size] = _T('\0');
1588
1589 // vsnprintf() may return either -1 (traditional Unix behaviour) or the
1590 // total number of characters which would have been written if the
1591 // buffer were large enough (newer standards such as Unix98)
1592 if ( len < 0 )
1593 {
1594 // NB: wxVsnprintf() may call either wxCRT_VsnprintfW or
1595 // wxCRT_VsnprintfA in UTF-8 build; wxUSE_WXVSNPRINTF
1596 // is true if *both* of them use our own implementation,
1597 // otherwise we can't be sure
1598 #if wxUSE_WXVSNPRINTF
1599 // we know that our own implementation of wxVsnprintf() returns -1
1600 // only for a format error - thus there's something wrong with
1601 // the user's format string
1602 buf[0] = '\0';
1603 return -1;
1604 #else // possibly using system version
1605 // assume it only returns error if there is not enough space, but
1606 // as we don't know how much we need, double the current size of
1607 // the buffer
1608 size *= 2;
1609 #endif // wxUSE_WXVSNPRINTF/!wxUSE_WXVSNPRINTF
1610 }
1611 else if ( len >= size )
1612 {
1613 #if wxUSE_WXVSNPRINTF
1614 // we know that our own implementation of wxVsnprintf() returns
1615 // size+1 when there's not enough space but that's not the size
1616 // of the required buffer!
1617 size *= 2; // so we just double the current size of the buffer
1618 #else
1619 // some vsnprintf() implementations NUL-terminate the buffer and
1620 // some don't in len == size case, to be safe always add 1
1621 size = len + 1;
1622 #endif
1623 }
1624 else // ok, there was enough space
1625 {
1626 break;
1627 }
1628 }
1629
1630 // we could have overshot
1631 str.Shrink();
1632
1633 return str.length();
1634 }
1635
1636 int wxString::PrintfV(const wxString& format, va_list argptr)
1637 {
1638 #if wxUSE_UNICODE_UTF8
1639 #if wxUSE_STL_BASED_WXSTRING
1640 typedef wxStringTypeBuffer<char> Utf8Buffer;
1641 #else
1642 typedef wxImplStringBuffer Utf8Buffer;
1643 #endif
1644 #endif
1645
1646 #if wxUSE_UTF8_LOCALE_ONLY
1647 return DoStringPrintfV<Utf8Buffer>(*this, format, argptr);
1648 #else
1649 #if wxUSE_UNICODE_UTF8
1650 if ( wxLocaleIsUtf8 )
1651 return DoStringPrintfV<Utf8Buffer>(*this, format, argptr);
1652 else
1653 // wxChar* version
1654 return DoStringPrintfV<wxStringBuffer>(*this, format, argptr);
1655 #else
1656 return DoStringPrintfV(*this, format, argptr);
1657 #endif // UTF8/WCHAR
1658 #endif
1659 }
1660
1661 // ----------------------------------------------------------------------------
1662 // misc other operations
1663 // ----------------------------------------------------------------------------
1664
1665 // returns true if the string matches the pattern which may contain '*' and
1666 // '?' metacharacters (as usual, '?' matches any character and '*' any number
1667 // of them)
1668 bool wxString::Matches(const wxString& mask) const
1669 {
1670 // I disable this code as it doesn't seem to be faster (in fact, it seems
1671 // to be much slower) than the old, hand-written code below and using it
1672 // here requires always linking with libregex even if the user code doesn't
1673 // use it
1674 #if 0 // wxUSE_REGEX
1675 // first translate the shell-like mask into a regex
1676 wxString pattern;
1677 pattern.reserve(wxStrlen(pszMask));
1678
1679 pattern += _T('^');
1680 while ( *pszMask )
1681 {
1682 switch ( *pszMask )
1683 {
1684 case _T('?'):
1685 pattern += _T('.');
1686 break;
1687
1688 case _T('*'):
1689 pattern += _T(".*");
1690 break;
1691
1692 case _T('^'):
1693 case _T('.'):
1694 case _T('$'):
1695 case _T('('):
1696 case _T(')'):
1697 case _T('|'):
1698 case _T('+'):
1699 case _T('\\'):
1700 // these characters are special in a RE, quote them
1701 // (however note that we don't quote '[' and ']' to allow
1702 // using them for Unix shell like matching)
1703 pattern += _T('\\');
1704 // fall through
1705
1706 default:
1707 pattern += *pszMask;
1708 }
1709
1710 pszMask++;
1711 }
1712 pattern += _T('$');
1713
1714 // and now use it
1715 return wxRegEx(pattern, wxRE_NOSUB | wxRE_EXTENDED).Matches(c_str());
1716 #else // !wxUSE_REGEX
1717 // TODO: this is, of course, awfully inefficient...
1718
1719 // FIXME-UTF8: implement using iterators, remove #if
1720 #if wxUSE_UNICODE_UTF8
1721 wxWCharBuffer maskBuf = mask.wc_str();
1722 wxWCharBuffer txtBuf = wc_str();
1723 const wxChar *pszMask = maskBuf.data();
1724 const wxChar *pszTxt = txtBuf.data();
1725 #else
1726 const wxChar *pszMask = mask.wx_str();
1727 // the char currently being checked
1728 const wxChar *pszTxt = wx_str();
1729 #endif
1730
1731 // the last location where '*' matched
1732 const wxChar *pszLastStarInText = NULL;
1733 const wxChar *pszLastStarInMask = NULL;
1734
1735 match:
1736 for ( ; *pszMask != wxT('\0'); pszMask++, pszTxt++ ) {
1737 switch ( *pszMask ) {
1738 case wxT('?'):
1739 if ( *pszTxt == wxT('\0') )
1740 return false;
1741
1742 // pszTxt and pszMask will be incremented in the loop statement
1743
1744 break;
1745
1746 case wxT('*'):
1747 {
1748 // remember where we started to be able to backtrack later
1749 pszLastStarInText = pszTxt;
1750 pszLastStarInMask = pszMask;
1751
1752 // ignore special chars immediately following this one
1753 // (should this be an error?)
1754 while ( *pszMask == wxT('*') || *pszMask == wxT('?') )
1755 pszMask++;
1756
1757 // if there is nothing more, match
1758 if ( *pszMask == wxT('\0') )
1759 return true;
1760
1761 // are there any other metacharacters in the mask?
1762 size_t uiLenMask;
1763 const wxChar *pEndMask = wxStrpbrk(pszMask, wxT("*?"));
1764
1765 if ( pEndMask != NULL ) {
1766 // we have to match the string between two metachars
1767 uiLenMask = pEndMask - pszMask;
1768 }
1769 else {
1770 // we have to match the remainder of the string
1771 uiLenMask = wxStrlen(pszMask);
1772 }
1773
1774 wxString strToMatch(pszMask, uiLenMask);
1775 const wxChar* pMatch = wxStrstr(pszTxt, strToMatch);
1776 if ( pMatch == NULL )
1777 return false;
1778
1779 // -1 to compensate "++" in the loop
1780 pszTxt = pMatch + uiLenMask - 1;
1781 pszMask += uiLenMask - 1;
1782 }
1783 break;
1784
1785 default:
1786 if ( *pszMask != *pszTxt )
1787 return false;
1788 break;
1789 }
1790 }
1791
1792 // match only if nothing left
1793 if ( *pszTxt == wxT('\0') )
1794 return true;
1795
1796 // if we failed to match, backtrack if we can
1797 if ( pszLastStarInText ) {
1798 pszTxt = pszLastStarInText + 1;
1799 pszMask = pszLastStarInMask;
1800
1801 pszLastStarInText = NULL;
1802
1803 // don't bother resetting pszLastStarInMask, it's unnecessary
1804
1805 goto match;
1806 }
1807
1808 return false;
1809 #endif // wxUSE_REGEX/!wxUSE_REGEX
1810 }
1811
1812 // Count the number of chars
1813 int wxString::Freq(wxUniChar ch) const
1814 {
1815 int count = 0;
1816 for ( const_iterator i = begin(); i != end(); ++i )
1817 {
1818 if ( *i == ch )
1819 count ++;
1820 }
1821 return count;
1822 }
1823
1824 // convert to upper case, return the copy of the string
1825 wxString wxString::Upper() const
1826 { wxString s(*this); return s.MakeUpper(); }
1827
1828 // convert to lower case, return the copy of the string
1829 wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
wxWidgets (Impactor)