add wxMBConvStrictUTF8 class implementing just UTF-8 conversion, without support...
[wxWidgets.git] / include / wx / strconv.h
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: strconv.h
3 // Purpose: conversion routines for char sets any Unicode
4 // Author: Ove Kaaven, Robert Roebling, Vadim Zeitlin
5 // Modified by:
6 // Created: 29/01/98
7 // RCS-ID: $Id$
8 // Copyright: (c) 1998 Ove Kaaven, Robert Roebling
9 // (c) 1998-2006 Vadim Zeitlin
10 // Licence: wxWindows licence
11 ///////////////////////////////////////////////////////////////////////////////
12
13 #ifndef _WX_STRCONV_H_
14 #define _WX_STRCONV_H_
15
16 #include "wx/defs.h"
17 #include "wx/chartype.h"
18 #include "wx/buffer.h"
19
20 #ifdef __DIGITALMARS__
21 #include "typeinfo.h"
22 #endif
23
24 #if defined(__VISAGECPP__) && __IBMCPP__ >= 400
25 # undef __BSEXCPT__
26 #endif
27
28 #include <stdlib.h>
29
30 #if wxUSE_WCHAR_T
31
32 class WXDLLIMPEXP_FWD_BASE wxString;
33
34 // the error value returned by wxMBConv methods
35 #define wxCONV_FAILED ((size_t)-1)
36
37 // the default value for some length parameters meaning that the string is
38 // NUL-terminated
39 #define wxNO_LEN ((size_t)-1)
40
41 // ----------------------------------------------------------------------------
42 // wxMBConv (abstract base class for conversions)
43 // ----------------------------------------------------------------------------
44
45 // When deriving a new class from wxMBConv you must reimplement ToWChar() and
46 // FromWChar() methods which are not pure virtual only for historical reasons,
47 // don't let the fact that the existing classes implement MB2WC/WC2MB() instead
48 // confuse you.
49 //
50 // You also have to implement Clone() to allow copying the conversions
51 // polymorphically.
52 //
53 // And you might need to override GetMBNulLen() as well.
54 class WXDLLIMPEXP_BASE wxMBConv
55 {
56 public:
57 // The functions doing actual conversion from/to narrow to/from wide
58 // character strings.
59 //
60 // On success, the return value is the length (i.e. the number of
61 // characters, not bytes) of the converted string including any trailing
62 // L'\0' or (possibly multiple) '\0'(s). If the conversion fails or if
63 // there is not enough space for everything, including the trailing NUL
64 // character(s), in the output buffer, wxCONV_FAILED is returned.
65 //
66 // In the special case when dstLen is 0 (outputBuf may be NULL then) the
67 // return value is the length of the needed buffer but nothing happens
68 // otherwise. If srcLen is wxNO_LEN, the entire string, up to and
69 // including the trailing NUL(s), is converted, otherwise exactly srcLen
70 // bytes are.
71 //
72 // Typical usage:
73 //
74 // size_t dstLen = conv.ToWChar(NULL, 0, src);
75 // if ( dstLen != wxCONV_FAILED )
76 // ... handle error ...
77 // wchar_t *wbuf = new wchar_t[dstLen];
78 // conv.ToWChar(wbuf, dstLen, src);
79 //
80 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
81 const char *src, size_t srcLen = wxNO_LEN) const;
82
83 virtual size_t FromWChar(char *dst, size_t dstLen,
84 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
85
86
87 // Convenience functions for translating NUL-terminated strings: returns
88 // the buffer containing the converted string or NULL pointer if the
89 // conversion failed.
90 const wxWCharBuffer cMB2WC(const char *in) const;
91 const wxCharBuffer cWC2MB(const wchar_t *in) const;
92
93 // Convenience functions for converting strings which may contain embedded
94 // NULs and don't have to be NUL-terminated.
95 //
96 // inLen is the length of the buffer including trailing NUL if any: if the
97 // last 4 bytes of the buffer are all NULs, these functions are more
98 // efficient as they avoid copying the string, but otherwise a copy is made
99 // internally which could be quite bad for (very) long strings.
100 //
101 // outLen receives, if not NULL, the length of the converted string or 0 if
102 // the conversion failed (returning 0 and not -1 in this case makes it
103 // difficult to distinguish between failed conversion and empty input but
104 // this is done for backwards compatibility)
105 const wxWCharBuffer
106 cMB2WC(const char *in, size_t inLen, size_t *outLen) const;
107 const wxCharBuffer
108 cWC2MB(const wchar_t *in, size_t inLen, size_t *outLen) const;
109
110 // convenience functions for converting MB or WC to/from wxWin default
111 #if wxUSE_UNICODE
112 const wxWCharBuffer cMB2WX(const char *psz) const { return cMB2WC(psz); }
113 const wxCharBuffer cWX2MB(const wchar_t *psz) const { return cWC2MB(psz); }
114 const wchar_t* cWC2WX(const wchar_t *psz) const { return psz; }
115 const wchar_t* cWX2WC(const wchar_t *psz) const { return psz; }
116 #else // ANSI
117 const char* cMB2WX(const char *psz) const { return psz; }
118 const char* cWX2MB(const char *psz) const { return psz; }
119 const wxCharBuffer cWC2WX(const wchar_t *psz) const { return cWC2MB(psz); }
120 const wxWCharBuffer cWX2WC(const char *psz) const { return cMB2WC(psz); }
121 #endif // Unicode/ANSI
122
123 // this function is used in the implementation of cMB2WC() to distinguish
124 // between the following cases:
125 //
126 // a) var width encoding with strings terminated by a single NUL
127 // (usual multibyte encodings): return 1 in this case
128 // b) fixed width encoding with 2 bytes/char and so terminated by
129 // 2 NULs (UTF-16/UCS-2 and variants): return 2 in this case
130 // c) fixed width encoding with 4 bytes/char and so terminated by
131 // 4 NULs (UTF-32/UCS-4 and variants): return 4 in this case
132 //
133 // anything else is not supported currently and -1 should be returned
134 virtual size_t GetMBNulLen() const { return 1; }
135
136 // return the maximal value currently returned by GetMBNulLen() for any
137 // encoding
138 static size_t GetMaxMBNulLen() { return 4 /* for UTF-32 */; }
139
140 #if wxUSE_UNICODE_UTF8
141 // return true if the converter's charset is UTF-8, i.e. char* strings
142 // decoded using this object can be directly copied to wxString's internal
143 // storage without converting to WC and than back to UTF-8 MB string
144 virtual bool IsUTF8() const { return false; }
145 #endif
146
147 // The old conversion functions. The existing classes currently mostly
148 // implement these ones but we're in transition to using To/FromWChar()
149 // instead and any new classes should implement just the new functions.
150 // For now, however, we provide default implementation of To/FromWChar() in
151 // this base class in terms of MB2WC/WC2MB() to avoid having to rewrite all
152 // the conversions at once.
153 //
154 // On success, the return value is the length (i.e. the number of
155 // characters, not bytes) not counting the trailing NUL(s) of the converted
156 // string. On failure, (size_t)-1 is returned. In the special case when
157 // outputBuf is NULL the return value is the same one but nothing is
158 // written to the buffer.
159 //
160 // Note that outLen is the length of the output buffer, not the length of
161 // the input (which is always supposed to be terminated by one or more
162 // NULs, as appropriate for the encoding)!
163 virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const;
164 virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const;
165
166
167 // make a heap-allocated copy of this object
168 virtual wxMBConv *Clone() const = 0;
169
170 // virtual dtor for any base class
171 virtual ~wxMBConv();
172 };
173
174 // ----------------------------------------------------------------------------
175 // wxMBConvLibc uses standard mbstowcs() and wcstombs() functions for
176 // conversion (hence it depends on the current locale)
177 // ----------------------------------------------------------------------------
178
179 class WXDLLIMPEXP_BASE wxMBConvLibc : public wxMBConv
180 {
181 public:
182 virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
183 virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
184
185 virtual wxMBConv *Clone() const { return new wxMBConvLibc; }
186
187 #if wxUSE_UNICODE_UTF8
188 virtual bool IsUTF8() const { return wxLocaleIsUtf8; }
189 #endif
190 };
191
192 #ifdef __UNIX__
193
194 // ----------------------------------------------------------------------------
195 // wxConvBrokenFileNames is made for Unix in Unicode mode when
196 // files are accidentally written in an encoding which is not
197 // the system encoding. Typically, the system encoding will be
198 // UTF8 but there might be files stored in ISO8859-1 on disk.
199 // ----------------------------------------------------------------------------
200
201 class WXDLLIMPEXP_BASE wxConvBrokenFileNames : public wxMBConv
202 {
203 public:
204 wxConvBrokenFileNames(const wxString& charset);
205 wxConvBrokenFileNames(const wxConvBrokenFileNames& conv)
206 : wxMBConv(),
207 m_conv(conv.m_conv ? conv.m_conv->Clone() : NULL)
208 {
209 }
210 virtual ~wxConvBrokenFileNames() { delete m_conv; }
211
212 virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const
213 {
214 return m_conv->MB2WC(out, in, outLen);
215 }
216
217 virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const
218 {
219 return m_conv->WC2MB(out, in, outLen);
220 }
221
222 virtual size_t GetMBNulLen() const
223 {
224 // cast needed to call a private function
225 return m_conv->GetMBNulLen();
226 }
227
228 #if wxUSE_UNICODE_UTF8
229 virtual bool IsUTF8() const { return m_conv->IsUTF8(); }
230 #endif
231
232 virtual wxMBConv *Clone() const { return new wxConvBrokenFileNames(*this); }
233
234 private:
235 // the conversion object we forward to
236 wxMBConv *m_conv;
237
238 DECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames)
239 };
240
241 #endif // __UNIX__
242
243 // ----------------------------------------------------------------------------
244 // wxMBConvUTF7 (for conversion using UTF7 encoding)
245 // ----------------------------------------------------------------------------
246
247 class WXDLLIMPEXP_BASE wxMBConvUTF7 : public wxMBConv
248 {
249 public:
250 virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
251 virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
252
253 virtual wxMBConv *Clone() const { return new wxMBConvUTF7; }
254 };
255
256 // ----------------------------------------------------------------------------
257 // wxMBConvUTF8 (for conversion using UTF8 encoding)
258 // ----------------------------------------------------------------------------
259
260 // this is the real UTF-8 conversion class, it has to be called "strict UTF-8"
261 // for compatibility reasons: the wxMBConvUTF8 class below also supports lossy
262 // conversions if it is created with non default options
263 class WXDLLIMPEXP_BASE wxMBConvStrictUTF8 : public wxMBConv
264 {
265 public:
266 // compiler-generated default ctor and other methods are ok
267
268 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
269 const char *src, size_t srcLen = wxNO_LEN) const;
270 virtual size_t FromWChar(char *dst, size_t dstLen,
271 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
272
273 virtual wxMBConv *Clone() const { return new wxMBConvStrictUTF8(); }
274
275 #if wxUSE_UNICODE_UTF8
276 // NB: other mapping modes are not, strictly speaking, UTF-8, so we can't
277 // take the shortcut in that case
278 virtual bool IsUTF8() const { return true; }
279 #endif
280 };
281
282 class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConvStrictUTF8
283 {
284 public:
285 enum
286 {
287 MAP_INVALID_UTF8_NOT = 0,
288 MAP_INVALID_UTF8_TO_PUA = 1,
289 MAP_INVALID_UTF8_TO_OCTAL = 2
290 };
291
292 wxMBConvUTF8(int options = MAP_INVALID_UTF8_NOT) : m_options(options) { }
293 virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
294 virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
295
296 virtual wxMBConv *Clone() const { return new wxMBConvUTF8(m_options); }
297
298 #if wxUSE_UNICODE_UTF8
299 // NB: other mapping modes are not, strictly speaking, UTF-8, so we can't
300 // take the shortcut in that case
301 virtual bool IsUTF8() const { return m_options == MAP_INVALID_UTF8_NOT; }
302 #endif
303
304 private:
305 int m_options;
306 };
307
308 // ----------------------------------------------------------------------------
309 // wxMBConvUTF16Base: for both LE and BE variants
310 // ----------------------------------------------------------------------------
311
312 class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv
313 {
314 public:
315 enum { BYTES_PER_CHAR = 2 };
316
317 virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
318
319 protected:
320 // return the length of the buffer using srcLen if it's not wxNO_LEN and
321 // computing the length ourselves if it is; also checks that the length is
322 // even if specified as we need an entire number of UTF-16 characters and
323 // returns wxNO_LEN which indicates error if it is odd
324 static size_t GetLength(const char *src, size_t srcLen);
325 };
326
327 // ----------------------------------------------------------------------------
328 // wxMBConvUTF16LE (for conversion using UTF16 Little Endian encoding)
329 // ----------------------------------------------------------------------------
330
331 class WXDLLIMPEXP_BASE wxMBConvUTF16LE : public wxMBConvUTF16Base
332 {
333 public:
334 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
335 const char *src, size_t srcLen = wxNO_LEN) const;
336 virtual size_t FromWChar(char *dst, size_t dstLen,
337 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
338 virtual wxMBConv *Clone() const { return new wxMBConvUTF16LE; }
339 };
340
341 // ----------------------------------------------------------------------------
342 // wxMBConvUTF16BE (for conversion using UTF16 Big Endian encoding)
343 // ----------------------------------------------------------------------------
344
345 class WXDLLIMPEXP_BASE wxMBConvUTF16BE : public wxMBConvUTF16Base
346 {
347 public:
348 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
349 const char *src, size_t srcLen = wxNO_LEN) const;
350 virtual size_t FromWChar(char *dst, size_t dstLen,
351 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
352 virtual wxMBConv *Clone() const { return new wxMBConvUTF16BE; }
353 };
354
355 // ----------------------------------------------------------------------------
356 // wxMBConvUTF32Base: base class for both LE and BE variants
357 // ----------------------------------------------------------------------------
358
359 class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv
360 {
361 public:
362 enum { BYTES_PER_CHAR = 4 };
363
364 virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
365
366 protected:
367 // this is similar to wxMBConvUTF16Base method with the same name except
368 // that, of course, it verifies that length is divisible by 4 if given and
369 // not by 2
370 static size_t GetLength(const char *src, size_t srcLen);
371 };
372
373 // ----------------------------------------------------------------------------
374 // wxMBConvUTF32LE (for conversion using UTF32 Little Endian encoding)
375 // ----------------------------------------------------------------------------
376
377 class WXDLLIMPEXP_BASE wxMBConvUTF32LE : public wxMBConvUTF32Base
378 {
379 public:
380 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
381 const char *src, size_t srcLen = wxNO_LEN) const;
382 virtual size_t FromWChar(char *dst, size_t dstLen,
383 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
384 virtual wxMBConv *Clone() const { return new wxMBConvUTF32LE; }
385 };
386
387 // ----------------------------------------------------------------------------
388 // wxMBConvUTF32BE (for conversion using UTF32 Big Endian encoding)
389 // ----------------------------------------------------------------------------
390
391 class WXDLLIMPEXP_BASE wxMBConvUTF32BE : public wxMBConvUTF32Base
392 {
393 public:
394 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
395 const char *src, size_t srcLen = wxNO_LEN) const;
396 virtual size_t FromWChar(char *dst, size_t dstLen,
397 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
398 virtual wxMBConv *Clone() const { return new wxMBConvUTF32BE; }
399 };
400
401 // ----------------------------------------------------------------------------
402 // wxCSConv (for conversion based on loadable char sets)
403 // ----------------------------------------------------------------------------
404
405 #include "wx/fontenc.h"
406
407 class WXDLLIMPEXP_BASE wxCSConv : public wxMBConv
408 {
409 public:
410 // we can be created either from charset name or from an encoding constant
411 // but we can't have both at once
412 wxCSConv(const wxString& charset);
413 wxCSConv(wxFontEncoding encoding);
414
415 wxCSConv(const wxCSConv& conv);
416 virtual ~wxCSConv();
417
418 wxCSConv& operator=(const wxCSConv& conv);
419
420 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
421 const char *src, size_t srcLen = wxNO_LEN) const;
422 virtual size_t FromWChar(char *dst, size_t dstLen,
423 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
424 virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
425 virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
426 virtual size_t GetMBNulLen() const;
427
428 #if wxUSE_UNICODE_UTF8
429 virtual bool IsUTF8() const;
430 #endif
431
432 virtual wxMBConv *Clone() const { return new wxCSConv(*this); }
433
434 void Clear();
435
436 // return true if the conversion could be initilized successfully
437 bool IsOk() const;
438
439 private:
440 // common part of all ctors
441 void Init();
442
443 // creates m_convReal if necessary
444 void CreateConvIfNeeded() const;
445
446 // do create m_convReal (unconditionally)
447 wxMBConv *DoCreate() const;
448
449 // set the name (may be only called when m_name == NULL), makes copy of
450 // charset string
451 void SetName(const char *charset);
452
453
454 // note that we can't use wxString here because of compilation
455 // dependencies: we're included from wx/string.h
456 char *m_name;
457 wxFontEncoding m_encoding;
458
459 // use CreateConvIfNeeded() before accessing m_convReal!
460 wxMBConv *m_convReal;
461 bool m_deferred;
462 };
463
464
465 // ----------------------------------------------------------------------------
466 // declare predefined conversion objects
467 // ----------------------------------------------------------------------------
468
469 // Note: this macro is an implementation detail (see the comment in
470 // strconv.cpp). The wxGet_XXX() and wxGet_XXXPtr() functions shouldn't be
471 // used by user code and neither should XXXPtr, use the wxConvXXX macro
472 // instead.
473 #define WX_DECLARE_GLOBAL_CONV(klass, name) \
474 extern WXDLLIMPEXP_DATA_BASE(klass*) name##Ptr; \
475 extern WXDLLIMPEXP_BASE klass* wxGet_##name##Ptr(); \
476 inline klass& wxGet_##name() \
477 { \
478 if ( !name##Ptr ) \
479 name##Ptr = wxGet_##name##Ptr(); \
480 return *name##Ptr; \
481 }
482
483
484 // conversion to be used with all standard functions affected by locale, e.g.
485 // strtol(), strftime(), ...
486 WX_DECLARE_GLOBAL_CONV(wxMBConv, wxConvLibc)
487 #define wxConvLibc wxGet_wxConvLibc()
488
489 // conversion ISO-8859-1/UTF-7/UTF-8 <-> wchar_t
490 WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvISO8859_1)
491 #define wxConvISO8859_1 wxGet_wxConvISO8859_1()
492
493 WX_DECLARE_GLOBAL_CONV(wxMBConvStrictUTF8, wxConvUTF8)
494 #define wxConvUTF8 wxGet_wxConvUTF8()
495
496 WX_DECLARE_GLOBAL_CONV(wxMBConvUTF7, wxConvUTF7)
497 #define wxConvUTF7 wxGet_wxConvUTF7()
498
499 // conversion used for the file names on the systems where they're not Unicode
500 // (basically anything except Windows)
501 //
502 // this is used by all file functions, can be changed by the application
503 //
504 // by default UTF-8 under Mac OS X and wxConvLibc elsewhere (but it's not used
505 // under Windows normally)
506 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName;
507
508 // backwards compatible define
509 #define wxConvFile (*wxConvFileName)
510
511 // the current conversion object, may be set to any conversion, is used by
512 // default in a couple of places inside wx (initially same as wxConvLibc)
513 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
514
515 // the conversion corresponding to the current locale
516 WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvLocal)
517 #define wxConvLocal wxGet_wxConvLocal()
518
519 // the conversion corresponding to the encoding of the standard UI elements
520 //
521 // by default this is the same as wxConvLocal but may be changed if the program
522 // needs to use a fixed encoding
523 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI;
524
525 #undef WX_DECLARE_GLOBAL_CONV
526
527 // ----------------------------------------------------------------------------
528 // endianness-dependent conversions
529 // ----------------------------------------------------------------------------
530
531 #ifdef WORDS_BIGENDIAN
532 typedef wxMBConvUTF16BE wxMBConvUTF16;
533 typedef wxMBConvUTF32BE wxMBConvUTF32;
534 #else
535 typedef wxMBConvUTF16LE wxMBConvUTF16;
536 typedef wxMBConvUTF32LE wxMBConvUTF32;
537 #endif
538
539 // ----------------------------------------------------------------------------
540 // filename conversion macros
541 // ----------------------------------------------------------------------------
542
543 // filenames are multibyte on Unix and widechar on Windows
544 #if wxMBFILES && wxUSE_UNICODE
545 #define wxFNCONV(name) wxConvFileName->cWX2MB(name)
546 #define wxFNSTRINGCAST wxMBSTRINGCAST
547 #else
548 #if defined( __WXOSX__ ) && wxMBFILES
549 #define wxFNCONV(name) wxConvFileName->cWC2MB( wxConvLocal.cWX2WC(name) )
550 #else
551 #define wxFNCONV(name) name
552 #endif
553 #define wxFNSTRINGCAST WXSTRINGCAST
554 #endif
555
556 #else // !wxUSE_WCHAR_T
557
558 // ----------------------------------------------------------------------------
559 // stand-ins in absence of wchar_t
560 // ----------------------------------------------------------------------------
561
562 class WXDLLIMPEXP_BASE wxMBConv
563 {
564 public:
565 const char* cMB2WX(const char *psz) const { return psz; }
566 const char* cWX2MB(const char *psz) const { return psz; }
567 };
568
569 #define wxConvFile wxConvLocal
570
571 extern WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc,
572 wxConvLocal,
573 wxConvISO8859_1,
574 wxConvUTF8;
575 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
576
577 #define wxFNCONV(name) name
578 #define wxFNSTRINGCAST WXSTRINGCAST
579
580 #endif
581 // wxUSE_WCHAR_T
582
583 // ----------------------------------------------------------------------------
584 // macros for the most common conversions
585 // ----------------------------------------------------------------------------
586
587 #if wxUSE_UNICODE
588 #define wxConvertWX2MB(s) wxConvCurrent->cWX2MB(s)
589 #define wxConvertMB2WX(s) wxConvCurrent->cMB2WX(s)
590
591 // these functions should be used when the conversions really, really have
592 // to succeed (usually because we pass their results to a standard C
593 // function which would crash if we passed NULL to it), so these functions
594 // always return a valid pointer if their argument is non-NULL
595
596 // this function safety is achieved by trying wxConvLibc first, wxConvUTF8
597 // next if it fails and, finally, wxConvISO8859_1 which always succeeds
598 extern WXDLLIMPEXP_BASE wxWCharBuffer wxSafeConvertMB2WX(const char *s);
599
600 // this function uses wxConvLibc and wxConvUTF8(MAP_INVALID_UTF8_TO_OCTAL)
601 // if it fails
602 extern WXDLLIMPEXP_BASE wxCharBuffer wxSafeConvertWX2MB(const wchar_t *ws);
603 #else // ANSI
604 // no conversions to do
605 #define wxConvertWX2MB(s) (s)
606 #define wxConvertMB2WX(s) (s)
607 #define wxSafeConvertMB2WX(s) (s)
608 #define wxSafeConvertWX2MB(s) (s)
609 #endif // Unicode/ANSI
610
611 #endif // _WX_STRCONV_H_
612