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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 #ifndef __WXPALMOS5__
29 #include <stdlib.h>
30 #endif // ! __WXPALMOS5__
31
32 #if wxUSE_WCHAR_T
33
34 class WXDLLIMPEXP_FWD_BASE wxString;
35
36 // the error value returned by wxMBConv methods
37 #define wxCONV_FAILED ((size_t)-1)
38
39 // ----------------------------------------------------------------------------
40 // wxMBConv (abstract base class for conversions)
41 // ----------------------------------------------------------------------------
42
43 // When deriving a new class from wxMBConv you must reimplement ToWChar() and
44 // FromWChar() methods which are not pure virtual only for historical reasons,
45 // don't let the fact that the existing classes implement MB2WC/WC2MB() instead
46 // confuse you.
47 //
48 // You also have to implement Clone() to allow copying the conversions
49 // polymorphically.
50 //
51 // And you might need to override GetMBNulLen() as well.
52 class WXDLLIMPEXP_BASE wxMBConv
53 {
54 public:
55 // The functions doing actual conversion from/to narrow to/from wide
56 // character strings.
57 //
58 // On success, the return value is the length (i.e. the number of
59 // characters, not bytes) of the converted string including any trailing
60 // L'\0' or (possibly multiple) '\0'(s). If the conversion fails or if
61 // there is not enough space for everything, including the trailing NUL
62 // character(s), in the output buffer, wxCONV_FAILED is returned.
63 //
64 // In the special case when dstLen is 0 (outputBuf may be NULL then) the
65 // return value is the length of the needed buffer but nothing happens
66 // otherwise. If srcLen is wxNO_LEN, the entire string, up to and
67 // including the trailing NUL(s), is converted, otherwise exactly srcLen
68 // bytes are.
69 //
70 // Typical usage:
71 //
72 // size_t dstLen = conv.ToWChar(NULL, 0, src);
73 // if ( dstLen != wxCONV_FAILED )
74 // ... handle error ...
75 // wchar_t *wbuf = new wchar_t[dstLen];
76 // conv.ToWChar(wbuf, dstLen, src);
77 //
78 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
79 const char *src, size_t srcLen = wxNO_LEN) const;
80
81 virtual size_t FromWChar(char *dst, size_t dstLen,
82 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
83
84
85 // Convenience functions for translating NUL-terminated strings: returns
86 // the buffer containing the converted string or NULL pointer if the
87 // conversion failed.
88 const wxWCharBuffer cMB2WC(const char *in) const;
89 const wxCharBuffer cWC2MB(const wchar_t *in) const;
90
91 // Convenience functions for converting strings which may contain embedded
92 // NULs and don't have to be NUL-terminated.
93 //
94 // inLen is the length of the buffer including trailing NUL if any or
95 // wxNO_LEN if the input is NUL-terminated.
96 //
97 // outLen receives, if not NULL, the length of the converted string or 0 if
98 // the conversion failed (returning 0 and not -1 in this case makes it
99 // difficult to distinguish between failed conversion and empty input but
100 // this is done for backwards compatibility). Notice that the rules for
101 // whether outLen accounts or not for the last NUL are the same as for
102 // To/FromWChar() above: if inLen is specified, outLen is exactly the
103 // number of characters converted, whether the last one of them was NUL or
104 // not. But if inLen == wxNO_LEN then outLen doesn't account for the last
105 // NUL even though it is present.
106 const wxWCharBuffer
107 cMB2WC(const char *in, size_t inLen, size_t *outLen) const;
108 const wxCharBuffer
109 cWC2MB(const wchar_t *in, size_t inLen, size_t *outLen) const;
110
111 // convenience functions for converting MB or WC to/from wxWin default
112 #if wxUSE_UNICODE
113 const wxWCharBuffer cMB2WX(const char *psz) const { return cMB2WC(psz); }
114 const wxCharBuffer cWX2MB(const wchar_t *psz) const { return cWC2MB(psz); }
115 const wchar_t* cWC2WX(const wchar_t *psz) const { return psz; }
116 const wchar_t* cWX2WC(const wchar_t *psz) const { return psz; }
117 #else // ANSI
118 const char* cMB2WX(const char *psz) const { return psz; }
119 const char* cWX2MB(const char *psz) const { return psz; }
120 const wxCharBuffer cWC2WX(const wchar_t *psz) const { return cWC2MB(psz); }
121 const wxWCharBuffer cWX2WC(const char *psz) const { return cMB2WC(psz); }
122 #endif // Unicode/ANSI
123
124 // this function is used in the implementation of cMB2WC() to distinguish
125 // between the following cases:
126 //
127 // a) var width encoding with strings terminated by a single NUL
128 // (usual multibyte encodings): return 1 in this case
129 // b) fixed width encoding with 2 bytes/char and so terminated by
130 // 2 NULs (UTF-16/UCS-2 and variants): return 2 in this case
131 // c) fixed width encoding with 4 bytes/char and so terminated by
132 // 4 NULs (UTF-32/UCS-4 and variants): return 4 in this case
133 //
134 // anything else is not supported currently and -1 should be returned
135 virtual size_t GetMBNulLen() const { return 1; }
136
137 // return the maximal value currently returned by GetMBNulLen() for any
138 // encoding
139 static size_t GetMaxMBNulLen() { return 4 /* for UTF-32 */; }
140
141 #if wxUSE_UNICODE_UTF8
142 // return true if the converter's charset is UTF-8, i.e. char* strings
143 // decoded using this object can be directly copied to wxString's internal
144 // storage without converting to WC and than back to UTF-8 MB string
145 virtual bool IsUTF8() const { return false; }
146 #endif
147
148 // The old conversion functions. The existing classes currently mostly
149 // implement these ones but we're in transition to using To/FromWChar()
150 // instead and any new classes should implement just the new functions.
151 // For now, however, we provide default implementation of To/FromWChar() in
152 // this base class in terms of MB2WC/WC2MB() to avoid having to rewrite all
153 // the conversions at once.
154 //
155 // On success, the return value is the length (i.e. the number of
156 // characters, not bytes) not counting the trailing NUL(s) of the converted
157 // string. On failure, (size_t)-1 is returned. In the special case when
158 // outputBuf is NULL the return value is the same one but nothing is
159 // written to the buffer.
160 //
161 // Note that outLen is the length of the output buffer, not the length of
162 // the input (which is always supposed to be terminated by one or more
163 // NULs, as appropriate for the encoding)!
164 virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const;
165 virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const;
166
167
168 // make a heap-allocated copy of this object
169 virtual wxMBConv *Clone() const = 0;
170
171 // virtual dtor for any base class
172 virtual ~wxMBConv();
173 };
174
175 // ----------------------------------------------------------------------------
176 // wxMBConvLibc uses standard mbstowcs() and wcstombs() functions for
177 // conversion (hence it depends on the current locale)
178 // ----------------------------------------------------------------------------
179
180 class WXDLLIMPEXP_BASE wxMBConvLibc : public wxMBConv
181 {
182 public:
183 virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
184 virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
185
186 virtual wxMBConv *Clone() const { return new wxMBConvLibc; }
187
188 #if wxUSE_UNICODE_UTF8
189 virtual bool IsUTF8() const { return wxLocaleIsUtf8; }
190 #endif
191 };
192
193 #ifdef __UNIX__
194
195 // ----------------------------------------------------------------------------
196 // wxConvBrokenFileNames is made for Unix in Unicode mode when
197 // files are accidentally written in an encoding which is not
198 // the system encoding. Typically, the system encoding will be
199 // UTF8 but there might be files stored in ISO8859-1 on disk.
200 // ----------------------------------------------------------------------------
201
202 class WXDLLIMPEXP_BASE wxConvBrokenFileNames : public wxMBConv
203 {
204 public:
205 wxConvBrokenFileNames(const wxString& charset);
206 wxConvBrokenFileNames(const wxConvBrokenFileNames& conv)
207 : wxMBConv(),
208 m_conv(conv.m_conv ? conv.m_conv->Clone() : NULL)
209 {
210 }
211 virtual ~wxConvBrokenFileNames() { delete m_conv; }
212
213 virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const
214 {
215 return m_conv->MB2WC(out, in, outLen);
216 }
217
218 virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const
219 {
220 return m_conv->WC2MB(out, in, outLen);
221 }
222
223 virtual size_t GetMBNulLen() const
224 {
225 // cast needed to call a private function
226 return m_conv->GetMBNulLen();
227 }
228
229 #if wxUSE_UNICODE_UTF8
230 virtual bool IsUTF8() const { return m_conv->IsUTF8(); }
231 #endif
232
233 virtual wxMBConv *Clone() const { return new wxConvBrokenFileNames(*this); }
234
235 private:
236 // the conversion object we forward to
237 wxMBConv *m_conv;
238
239 wxDECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames);
240 };
241
242 #endif // __UNIX__
243
244 // ----------------------------------------------------------------------------
245 // wxMBConvUTF7 (for conversion using UTF7 encoding)
246 // ----------------------------------------------------------------------------
247
248 class WXDLLIMPEXP_BASE wxMBConvUTF7 : public wxMBConv
249 {
250 public:
251 wxMBConvUTF7() { }
252
253 // compiler-generated copy ctor, assignment operator and dtor are ok
254 // (assuming it's ok to copy the shift state -- not really sure about it)
255
256 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
257 const char *src, size_t srcLen = wxNO_LEN) const;
258 virtual size_t FromWChar(char *dst, size_t dstLen,
259 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
260
261 virtual wxMBConv *Clone() const { return new wxMBConvUTF7; }
262
263 private:
264 // UTF-7 decoder/encoder may be in direct mode or in shifted mode after a
265 // '+' (and until the '-' or any other non-base64 character)
266 struct StateMode
267 {
268 enum Mode
269 {
270 Direct, // pass through state
271 Shifted // after a '+' (and before '-')
272 };
273 };
274
275 // the current decoder state: this is only used by ToWChar() if srcLen
276 // parameter is not wxNO_LEN, when working on the entire NUL-terminated
277 // strings we neither update nor use the state
278 class DecoderState : private StateMode
279 {
280 private:
281 // current state: this one is private as we want to enforce the use of
282 // ToDirect/ToShifted() methods below
283 Mode mode;
284
285 public:
286 // the initial state is direct
287 DecoderState() { mode = Direct; }
288
289 // switch to/from shifted mode
290 void ToDirect() { mode = Direct; }
291 void ToShifted() { mode = Shifted; accum = bit = 0; isLSB = false; }
292
293 bool IsDirect() const { return mode == Direct; }
294 bool IsShifted() const { return mode == Shifted; }
295
296
297 // these variables are only used in shifted mode
298
299 unsigned int accum; // accumulator of the bit we've already got
300 unsigned int bit; // the number of bits consumed mod 8
301 unsigned char msb; // the high byte of UTF-16 word
302 bool isLSB; // whether we're decoding LSB or MSB of UTF-16 word
303 };
304
305 DecoderState m_stateDecoder;
306
307
308 // encoder state is simpler as we always receive entire Unicode characters
309 // on input
310 class EncoderState : private StateMode
311 {
312 private:
313 Mode mode;
314
315 public:
316 EncoderState() { mode = Direct; }
317
318 void ToDirect() { mode = Direct; }
319 void ToShifted() { mode = Shifted; accum = bit = 0; }
320
321 bool IsDirect() const { return mode == Direct; }
322 bool IsShifted() const { return mode == Shifted; }
323
324 unsigned int accum;
325 unsigned int bit;
326 };
327
328 EncoderState m_stateEncoder;
329 };
330
331 // ----------------------------------------------------------------------------
332 // wxMBConvUTF8 (for conversion using UTF8 encoding)
333 // ----------------------------------------------------------------------------
334
335 // this is the real UTF-8 conversion class, it has to be called "strict UTF-8"
336 // for compatibility reasons: the wxMBConvUTF8 class below also supports lossy
337 // conversions if it is created with non default options
338 class WXDLLIMPEXP_BASE wxMBConvStrictUTF8 : public wxMBConv
339 {
340 public:
341 // compiler-generated default ctor and other methods are ok
342
343 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
344 const char *src, size_t srcLen = wxNO_LEN) const;
345 virtual size_t FromWChar(char *dst, size_t dstLen,
346 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
347
348 virtual wxMBConv *Clone() const { return new wxMBConvStrictUTF8(); }
349
350 #if wxUSE_UNICODE_UTF8
351 // NB: other mapping modes are not, strictly speaking, UTF-8, so we can't
352 // take the shortcut in that case
353 virtual bool IsUTF8() const { return true; }
354 #endif
355 };
356
357 class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConvStrictUTF8
358 {
359 public:
360 enum
361 {
362 MAP_INVALID_UTF8_NOT = 0,
363 MAP_INVALID_UTF8_TO_PUA = 1,
364 MAP_INVALID_UTF8_TO_OCTAL = 2
365 };
366
367 wxMBConvUTF8(int options = MAP_INVALID_UTF8_NOT) : m_options(options) { }
368
369 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
370 const char *src, size_t srcLen = wxNO_LEN) const;
371 virtual size_t FromWChar(char *dst, size_t dstLen,
372 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
373
374 virtual wxMBConv *Clone() const { return new wxMBConvUTF8(m_options); }
375
376 #if wxUSE_UNICODE_UTF8
377 // NB: other mapping modes are not, strictly speaking, UTF-8, so we can't
378 // take the shortcut in that case
379 virtual bool IsUTF8() const { return m_options == MAP_INVALID_UTF8_NOT; }
380 #endif
381
382 private:
383 int m_options;
384 };
385
386 // ----------------------------------------------------------------------------
387 // wxMBConvUTF16Base: for both LE and BE variants
388 // ----------------------------------------------------------------------------
389
390 class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv
391 {
392 public:
393 enum { BYTES_PER_CHAR = 2 };
394
395 virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
396
397 protected:
398 // return the length of the buffer using srcLen if it's not wxNO_LEN and
399 // computing the length ourselves if it is; also checks that the length is
400 // even if specified as we need an entire number of UTF-16 characters and
401 // returns wxNO_LEN which indicates error if it is odd
402 static size_t GetLength(const char *src, size_t srcLen);
403 };
404
405 // ----------------------------------------------------------------------------
406 // wxMBConvUTF16LE (for conversion using UTF16 Little Endian encoding)
407 // ----------------------------------------------------------------------------
408
409 class WXDLLIMPEXP_BASE wxMBConvUTF16LE : public wxMBConvUTF16Base
410 {
411 public:
412 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
413 const char *src, size_t srcLen = wxNO_LEN) const;
414 virtual size_t FromWChar(char *dst, size_t dstLen,
415 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
416 virtual wxMBConv *Clone() const { return new wxMBConvUTF16LE; }
417 };
418
419 // ----------------------------------------------------------------------------
420 // wxMBConvUTF16BE (for conversion using UTF16 Big Endian encoding)
421 // ----------------------------------------------------------------------------
422
423 class WXDLLIMPEXP_BASE wxMBConvUTF16BE : public wxMBConvUTF16Base
424 {
425 public:
426 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
427 const char *src, size_t srcLen = wxNO_LEN) const;
428 virtual size_t FromWChar(char *dst, size_t dstLen,
429 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
430 virtual wxMBConv *Clone() const { return new wxMBConvUTF16BE; }
431 };
432
433 // ----------------------------------------------------------------------------
434 // wxMBConvUTF32Base: base class for both LE and BE variants
435 // ----------------------------------------------------------------------------
436
437 class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv
438 {
439 public:
440 enum { BYTES_PER_CHAR = 4 };
441
442 virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
443
444 protected:
445 // this is similar to wxMBConvUTF16Base method with the same name except
446 // that, of course, it verifies that length is divisible by 4 if given and
447 // not by 2
448 static size_t GetLength(const char *src, size_t srcLen);
449 };
450
451 // ----------------------------------------------------------------------------
452 // wxMBConvUTF32LE (for conversion using UTF32 Little Endian encoding)
453 // ----------------------------------------------------------------------------
454
455 class WXDLLIMPEXP_BASE wxMBConvUTF32LE : public wxMBConvUTF32Base
456 {
457 public:
458 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
459 const char *src, size_t srcLen = wxNO_LEN) const;
460 virtual size_t FromWChar(char *dst, size_t dstLen,
461 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
462 virtual wxMBConv *Clone() const { return new wxMBConvUTF32LE; }
463 };
464
465 // ----------------------------------------------------------------------------
466 // wxMBConvUTF32BE (for conversion using UTF32 Big Endian encoding)
467 // ----------------------------------------------------------------------------
468
469 class WXDLLIMPEXP_BASE wxMBConvUTF32BE : public wxMBConvUTF32Base
470 {
471 public:
472 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
473 const char *src, size_t srcLen = wxNO_LEN) const;
474 virtual size_t FromWChar(char *dst, size_t dstLen,
475 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
476 virtual wxMBConv *Clone() const { return new wxMBConvUTF32BE; }
477 };
478
479 // ----------------------------------------------------------------------------
480 // wxCSConv (for conversion based on loadable char sets)
481 // ----------------------------------------------------------------------------
482
483 #include "wx/fontenc.h"
484
485 class WXDLLIMPEXP_BASE wxCSConv : public wxMBConv
486 {
487 public:
488 // we can be created either from charset name or from an encoding constant
489 // but we can't have both at once
490 wxCSConv(const wxString& charset);
491 wxCSConv(wxFontEncoding encoding);
492
493 wxCSConv(const wxCSConv& conv);
494 virtual ~wxCSConv();
495
496 wxCSConv& operator=(const wxCSConv& conv);
497
498 virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
499 const char *src, size_t srcLen = wxNO_LEN) const;
500 virtual size_t FromWChar(char *dst, size_t dstLen,
501 const wchar_t *src, size_t srcLen = wxNO_LEN) const;
502 virtual size_t GetMBNulLen() const;
503
504 #if wxUSE_UNICODE_UTF8
505 virtual bool IsUTF8() const;
506 #endif
507
508 virtual wxMBConv *Clone() const { return new wxCSConv(*this); }
509
510 void Clear();
511
512 // return true if the conversion could be initialized successfully
513 bool IsOk() const;
514
515 private:
516 // common part of all ctors
517 void Init();
518
519 // creates m_convReal if necessary
520 void CreateConvIfNeeded() const;
521
522 // do create m_convReal (unconditionally)
523 wxMBConv *DoCreate() const;
524
525 // set the name (may be only called when m_name == NULL), makes copy of
526 // the charset string
527 void SetName(const char *charset);
528
529
530 // m_name may be NULL in which case m_encoding should be used
531 //
532 // note that we can't use wxString here because of compilation
533 // dependencies: we're included from wx/string.h
534 char *m_name;
535
536 // may be wxFONTENCODING_SYSTEM in which case m_name is used
537 //
538 // if m_name is NULL, then we should use the default system encoding
539 wxFontEncoding m_encoding;
540
541 // use CreateConvIfNeeded() before accessing m_convReal!
542 wxMBConv *m_convReal;
543 bool m_deferred;
544 };
545
546
547 // ----------------------------------------------------------------------------
548 // declare predefined conversion objects
549 // ----------------------------------------------------------------------------
550
551 // Note: this macro is an implementation detail (see the comment in
552 // strconv.cpp). The wxGet_XXX() and wxGet_XXXPtr() functions shouldn't be
553 // used by user code and neither should XXXPtr, use the wxConvXXX macro
554 // instead.
555 #define WX_DECLARE_GLOBAL_CONV(klass, name) \
556 extern WXDLLIMPEXP_DATA_BASE(klass*) name##Ptr; \
557 extern WXDLLIMPEXP_BASE klass* wxGet_##name##Ptr(); \
558 inline klass& wxGet_##name() \
559 { \
560 if ( !name##Ptr ) \
561 name##Ptr = wxGet_##name##Ptr(); \
562 return *name##Ptr; \
563 }
564
565
566 // conversion to be used with all standard functions affected by locale, e.g.
567 // strtol(), strftime(), ...
568 WX_DECLARE_GLOBAL_CONV(wxMBConv, wxConvLibc)
569 #define wxConvLibc wxGet_wxConvLibc()
570
571 // conversion ISO-8859-1/UTF-7/UTF-8 <-> wchar_t
572 WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvISO8859_1)
573 #define wxConvISO8859_1 wxGet_wxConvISO8859_1()
574
575 WX_DECLARE_GLOBAL_CONV(wxMBConvStrictUTF8, wxConvUTF8)
576 #define wxConvUTF8 wxGet_wxConvUTF8()
577
578 WX_DECLARE_GLOBAL_CONV(wxMBConvUTF7, wxConvUTF7)
579 #define wxConvUTF7 wxGet_wxConvUTF7()
580
581 // conversion used for the file names on the systems where they're not Unicode
582 // (basically anything except Windows)
583 //
584 // this is used by all file functions, can be changed by the application
585 //
586 // by default UTF-8 under Mac OS X and wxConvLibc elsewhere (but it's not used
587 // under Windows normally)
588 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName;
589
590 // backwards compatible define
591 #define wxConvFile (*wxConvFileName)
592
593 // the current conversion object, may be set to any conversion, is used by
594 // default in a couple of places inside wx (initially same as wxConvLibc)
595 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
596
597 // the conversion corresponding to the current locale
598 WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvLocal)
599 #define wxConvLocal wxGet_wxConvLocal()
600
601 // the conversion corresponding to the encoding of the standard UI elements
602 //
603 // by default this is the same as wxConvLocal but may be changed if the program
604 // needs to use a fixed encoding
605 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI;
606
607 #undef WX_DECLARE_GLOBAL_CONV
608
609 // ----------------------------------------------------------------------------
610 // endianness-dependent conversions
611 // ----------------------------------------------------------------------------
612
613 #ifdef WORDS_BIGENDIAN
614 typedef wxMBConvUTF16BE wxMBConvUTF16;
615 typedef wxMBConvUTF32BE wxMBConvUTF32;
616 #else
617 typedef wxMBConvUTF16LE wxMBConvUTF16;
618 typedef wxMBConvUTF32LE wxMBConvUTF32;
619 #endif
620
621 // ----------------------------------------------------------------------------
622 // filename conversion macros
623 // ----------------------------------------------------------------------------
624
625 // filenames are multibyte on Unix and widechar on Windows
626 #if wxMBFILES && wxUSE_UNICODE
627 #define wxFNCONV(name) wxConvFileName->cWX2MB(name)
628 #define wxFNSTRINGCAST wxMBSTRINGCAST
629 #else
630 #if defined( __WXOSX_OR_COCOA__ ) && wxMBFILES
631 #define wxFNCONV(name) wxConvFileName->cWC2MB( wxConvLocal.cWX2WC(name) )
632 #else
633 #define wxFNCONV(name) name
634 #endif
635 #define wxFNSTRINGCAST WXSTRINGCAST
636 #endif
637
638 #else // !wxUSE_WCHAR_T
639
640 // ----------------------------------------------------------------------------
641 // stand-ins in absence of wchar_t
642 // ----------------------------------------------------------------------------
643
644 class WXDLLIMPEXP_BASE wxMBConv
645 {
646 public:
647 const char* cMB2WX(const char *psz) const { return psz; }
648 const char* cWX2MB(const char *psz) const { return psz; }
649 };
650
651 #define wxConvFile wxConvLocal
652
653 extern WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc,
654 wxConvLocal,
655 wxConvISO8859_1,
656 wxConvUTF8;
657 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
658
659 #define wxFNCONV(name) name
660 #define wxFNSTRINGCAST WXSTRINGCAST
661
662 #endif
663 // wxUSE_WCHAR_T
664
665 // ----------------------------------------------------------------------------
666 // macros for the most common conversions
667 // ----------------------------------------------------------------------------
668
669 #if wxUSE_UNICODE
670 #define wxConvertWX2MB(s) wxConvCurrent->cWX2MB(s)
671 #define wxConvertMB2WX(s) wxConvCurrent->cMB2WX(s)
672
673 // these functions should be used when the conversions really, really have
674 // to succeed (usually because we pass their results to a standard C
675 // function which would crash if we passed NULL to it), so these functions
676 // always return a valid pointer if their argument is non-NULL
677
678 // this function safety is achieved by trying wxConvLibc first, wxConvUTF8
679 // next if it fails and, finally, wxConvISO8859_1 which always succeeds
680 extern WXDLLIMPEXP_BASE wxWCharBuffer wxSafeConvertMB2WX(const char *s);
681
682 // this function uses wxConvLibc and wxConvUTF8(MAP_INVALID_UTF8_TO_OCTAL)
683 // if it fails
684 extern WXDLLIMPEXP_BASE wxCharBuffer wxSafeConvertWX2MB(const wchar_t *ws);
685 #else // ANSI
686 // no conversions to do
687 #define wxConvertWX2MB(s) (s)
688 #define wxConvertMB2WX(s) (s)
689 #define wxSafeConvertMB2WX(s) (s)
690 #define wxSafeConvertWX2MB(s) (s)
691 #endif // Unicode/ANSI
692
693 #endif // _WX_STRCONV_H_
694