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[wxWidgets.git] / src / common / strconv.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: strconv.cpp
3 // Purpose: Unicode conversion classes
4 // Author: Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik
5 // Modified by:
6 // Created: 29/01/98
7 // RCS-ID: $Id$
8 // Copyright: (c) 1999 Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik
9 // Licence: wxWindows license
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 #ifdef __GNUG__
21 #pragma implementation "strconv.h"
22 #endif
23
24 // For compilers that support precompilation, includes "wx.h".
25 #include "wx/wxprec.h"
26
27 #ifdef __BORLANDC__
28 #pragma hdrstop
29 #endif
30
31 #ifdef __WXMSW__
32 #include "wx/msw/private.h"
33 #endif
34
35 #include <errno.h>
36 #include <ctype.h>
37 #include <string.h>
38 #include <stdlib.h>
39
40
41 #include "wx/debug.h"
42 #include "wx/strconv.h"
43 #include "wx/intl.h"
44 #include "wx/log.h"
45
46 // ----------------------------------------------------------------------------
47 // globals
48 // ----------------------------------------------------------------------------
49
50 WXDLLEXPORT_DATA(wxMBConv *) wxConvCurrent = &wxConvLibc;
51
52
53 // ============================================================================
54 // implementation
55 // ============================================================================
56
57 #if wxUSE_WCHAR_T
58
59 #ifdef __SALFORDC__
60 #include <clib.h>
61 #endif
62
63 #ifdef HAVE_ICONV
64 #include <iconv.h>
65 #endif
66
67 #ifdef __WXMSW__
68 #include <windows.h>
69 #endif
70
71 #define BSWAP_UCS4(str, len) { unsigned _c; for (_c=0; _c<len; _c++) str[_c]=wxUINT32_SWAP_ALWAYS(str[_c]); }
72 #define BSWAP_UTF16(str, len) { unsigned _c; for (_c=0; _c<len; _c++) str[_c]=wxUINT16_SWAP_ALWAYS(str[_c]); }
73
74 // under Unix SIZEOF_WCHAR_T is defined by configure, but under other platforms
75 // it might be not defined - assume the most common value
76 #ifndef SIZEOF_WCHAR_T
77 #define SIZEOF_WCHAR_T 2
78 #endif // !defined(SIZEOF_WCHAR_T)
79
80 #if SIZEOF_WCHAR_T == 4
81 #define WC_NAME "UCS4"
82 #define WC_BSWAP BSWAP_UCS4
83 #ifdef WORDS_BIGENDIAN
84 #define WC_NAME_BEST "UCS-4BE"
85 #else
86 #define WC_NAME_BEST "UCS-4LE"
87 #endif
88 #elif SIZEOF_WCHAR_T == 2
89 #define WC_NAME "UTF16"
90 #define WC_BSWAP BSWAP_UTF16
91 #define WC_UTF16
92 #ifdef WORDS_BIGENDIAN
93 #define WC_NAME_BEST "UTF-16BE"
94 #else
95 #define WC_NAME_BEST "UTF-16LE"
96 #endif
97 #else // sizeof(wchar_t) != 2 nor 4
98 // I don't know what to do about this
99 #error "Weird sizeof(wchar_t): please report your platform details to wx-users mailing list"
100 #endif
101
102
103 #ifdef WC_UTF16
104
105 static size_t encode_utf16(wxUint32 input, wchar_t *output)
106 {
107 if (input<=0xffff)
108 {
109 if (output) *output++ = input;
110 return 1;
111 }
112 else if (input>=0x110000)
113 {
114 return (size_t)-1;
115 }
116 else
117 {
118 if (output)
119 {
120 *output++ = (input >> 10)+0xd7c0;
121 *output++ = (input&0x3ff)+0xdc00;
122 }
123 return 2;
124 }
125 }
126
127 static size_t decode_utf16(const wchar_t* input, wxUint32& output)
128 {
129 if ((*input<0xd800) || (*input>0xdfff))
130 {
131 output = *input;
132 return 1;
133 }
134 else if ((input[1]<0xdc00) || (input[1]>=0xdfff))
135 {
136 output = *input;
137 return (size_t)-1;
138 }
139 else
140 {
141 output = ((input[0] - 0xd7c0) << 10) + (input[1] - 0xdc00);
142 return 2;
143 }
144 }
145
146 #endif // WC_UTF16
147
148 // ----------------------------------------------------------------------------
149 // wxMBConv
150 // ----------------------------------------------------------------------------
151
152 WXDLLEXPORT_DATA(wxMBConv) wxConvLibc;
153
154 size_t wxMBConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
155 {
156 return wxMB2WC(buf, psz, n);
157 }
158
159 size_t wxMBConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
160 {
161 return wxWC2MB(buf, psz, n);
162 }
163
164 const wxWCharBuffer wxMBConv::cMB2WC(const char *psz) const
165 {
166 if (psz)
167 {
168 size_t nLen = MB2WC((wchar_t *) NULL, psz, 0);
169 if (nLen == (size_t)-1)
170 return wxWCharBuffer((wchar_t *) NULL);
171 wxWCharBuffer buf(nLen);
172 MB2WC((wchar_t *)(const wchar_t *) buf, psz, nLen);
173 return buf;
174 }
175 else
176 return wxWCharBuffer((wchar_t *) NULL);
177 }
178
179 const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *psz) const
180 {
181 if (psz)
182 {
183 size_t nLen = WC2MB((char *) NULL, psz, 0);
184 if (nLen == (size_t)-1)
185 return wxCharBuffer((char *) NULL);
186 wxCharBuffer buf(nLen);
187 WC2MB((char *)(const char *) buf, psz, nLen);
188 return buf;
189 }
190 else
191 return wxCharBuffer((char *) NULL);
192 }
193
194 // ----------------------------------------------------------------------------
195 // standard file conversion
196 // ----------------------------------------------------------------------------
197
198 WXDLLEXPORT_DATA(wxMBConvFile) wxConvFile;
199
200 // just use the libc conversion for now
201 size_t wxMBConvFile::MB2WC(wchar_t *buf, const char *psz, size_t n) const
202 {
203 return wxMB2WC(buf, psz, n);
204 }
205
206 size_t wxMBConvFile::WC2MB(char *buf, const wchar_t *psz, size_t n) const
207 {
208 return wxWC2MB(buf, psz, n);
209 }
210
211 // ----------------------------------------------------------------------------
212 // standard gdk conversion
213 // ----------------------------------------------------------------------------
214
215 #ifdef __WXGTK12__
216
217 WXDLLEXPORT_DATA(wxMBConvGdk) wxConvGdk;
218
219 #include <gdk/gdk.h>
220
221 size_t wxMBConvGdk::MB2WC(wchar_t *buf, const char *psz, size_t n) const
222 {
223 if (buf)
224 {
225 return gdk_mbstowcs((GdkWChar *)buf, psz, n);
226 }
227 else
228 {
229 GdkWChar *nbuf = new GdkWChar[n=strlen(psz)];
230 size_t len = gdk_mbstowcs(nbuf, psz, n);
231 delete[] nbuf;
232 return len;
233 }
234 }
235
236 size_t wxMBConvGdk::WC2MB(char *buf, const wchar_t *psz, size_t n) const
237 {
238 char *mbstr = gdk_wcstombs((GdkWChar *)psz);
239 size_t len = mbstr ? strlen(mbstr) : 0;
240 if (buf)
241 {
242 if (len > n)
243 len = n;
244 memcpy(buf, psz, len);
245 if (len < n)
246 buf[len] = 0;
247 }
248 return len;
249 }
250
251 #endif // GTK > 1.0
252
253 // ----------------------------------------------------------------------------
254 // UTF-7
255 // ----------------------------------------------------------------------------
256
257 WXDLLEXPORT_DATA(wxMBConvUTF7) wxConvUTF7;
258
259 #if 0
260 static char utf7_setD[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
261 "abcdefghijklmnopqrstuvwxyz"
262 "0123456789'(),-./:?";
263 static char utf7_setO[]="!\"#$%&*;<=>@[]^_`{|}";
264 static char utf7_setB[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
265 "abcdefghijklmnopqrstuvwxyz"
266 "0123456789+/";
267 #endif
268
269 // TODO: write actual implementations of UTF-7 here
270 size_t wxMBConvUTF7::MB2WC(wchar_t * WXUNUSED(buf),
271 const char * WXUNUSED(psz),
272 size_t WXUNUSED(n)) const
273 {
274 return 0;
275 }
276
277 size_t wxMBConvUTF7::WC2MB(char * WXUNUSED(buf),
278 const wchar_t * WXUNUSED(psz),
279 size_t WXUNUSED(n)) const
280 {
281 return 0;
282 }
283
284 // ----------------------------------------------------------------------------
285 // UTF-8
286 // ----------------------------------------------------------------------------
287
288 WXDLLEXPORT_DATA(wxMBConvUTF8) wxConvUTF8;
289
290 static wxUint32 utf8_max[]=
291 { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff, 0xffffffff };
292
293 size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
294 {
295 size_t len = 0;
296
297 while (*psz && ((!buf) || (len < n)))
298 {
299 unsigned char cc = *psz++, fc = cc;
300 unsigned cnt;
301 for (cnt = 0; fc & 0x80; cnt++)
302 fc <<= 1;
303 if (!cnt)
304 {
305 // plain ASCII char
306 if (buf)
307 *buf++ = cc;
308 len++;
309 }
310 else
311 {
312 cnt--;
313 if (!cnt)
314 {
315 // invalid UTF-8 sequence
316 return (size_t)-1;
317 }
318 else
319 {
320 unsigned ocnt = cnt - 1;
321 wxUint32 res = cc & (0x3f >> cnt);
322 while (cnt--)
323 {
324 cc = *psz++;
325 if ((cc & 0xC0) != 0x80)
326 {
327 // invalid UTF-8 sequence
328 return (size_t)-1;
329 }
330 res = (res << 6) | (cc & 0x3f);
331 }
332 if (res <= utf8_max[ocnt])
333 {
334 // illegal UTF-8 encoding
335 return (size_t)-1;
336 }
337 #ifdef WC_UTF16
338 size_t pa = encode_utf16(res, buf);
339 if (pa == (size_t)-1)
340 return (size_t)-1;
341 if (buf)
342 buf += pa;
343 len += pa;
344 #else
345 if (buf)
346 *buf++ = res;
347 len++;
348 #endif
349 }
350 }
351 }
352 if (buf && (len < n))
353 *buf = 0;
354 return len;
355 }
356
357 size_t wxMBConvUTF8::WC2MB(char *buf, const wchar_t *psz, size_t n) const
358 {
359 size_t len = 0;
360
361 while (*psz && ((!buf) || (len < n)))
362 {
363 wxUint32 cc;
364 #ifdef WC_UTF16
365 size_t pa = decode_utf16(psz, cc);
366 psz += (pa == (size_t)-1) ? 1 : pa;
367 #else
368 cc=(*psz++) & 0x7fffffff;
369 #endif
370 unsigned cnt;
371 for (cnt = 0; cc > utf8_max[cnt]; cnt++) {}
372 if (!cnt)
373 {
374 // plain ASCII char
375 if (buf)
376 *buf++ = cc;
377 len++;
378 }
379
380 else
381 {
382 len += cnt + 1;
383 if (buf)
384 {
385 *buf++ = (-128 >> cnt) | ((cc >> (cnt * 6)) & (0x3f >> cnt));
386 while (cnt--)
387 *buf++ = 0x80 | ((cc >> (cnt * 6)) & 0x3f);
388 }
389 }
390 }
391
392 if (buf && (len<n)) *buf = 0;
393 return len;
394 }
395
396 // ----------------------------------------------------------------------------
397 // specified character set
398 // ----------------------------------------------------------------------------
399
400 WXDLLEXPORT_DATA(wxCSConv) wxConvLocal((const wxChar *)NULL);
401
402 #include "wx/encconv.h"
403 #include "wx/fontmap.h"
404
405 // TODO: add some tables here
406 // - perhaps common encodings to common codepages (for Win32)
407 // - perhaps common encodings to objects ("UTF8" -> wxConvUTF8)
408 // - move wxEncodingConverter meat in here
409
410 #if defined(__WIN32__) && !defined(__WXMICROWIN__)
411
412 #if wxUSE_GUI
413
414 // VZ: the new version of wxCharsetToCodepage() is more politically correct
415 // and should work on other Windows versions as well but the old version is
416 // still needed for !wxUSE_FONTMAP || !wxUSE_GUI case
417
418 extern long wxEncodingToCodepage(wxFontEncoding encoding)
419 {
420 // translate encoding into the Windows CHARSET
421 wxNativeEncodingInfo natveEncInfo;
422 if ( !wxGetNativeFontEncoding(encoding, &natveEncInfo) )
423 return -1;
424
425 // translate CHARSET to code page
426 CHARSETINFO csetInfo;
427 if ( !::TranslateCharsetInfo((DWORD *)(DWORD)natveEncInfo.charset,
428 &csetInfo,
429 TCI_SRCCHARSET) )
430 {
431 wxLogLastError(_T("TranslateCharsetInfo(TCI_SRCCHARSET)"));
432
433 return -1;
434 }
435
436 return csetInfo.ciACP;
437 }
438
439 #if wxUSE_FONTMAP
440
441 extern long wxCharsetToCodepage(const wxChar *name)
442 {
443 // first get the font encoding for this charset
444 if ( !name )
445 return -1;
446
447 wxFontEncoding enc = wxTheFontMapper->CharsetToEncoding(name, FALSE);
448 if ( enc == wxFONTENCODING_SYSTEM )
449 return -1;
450
451 // the use the helper function
452 return wxEncodingToCodepage(enc);
453 }
454
455 #endif // wxUSE_FONTMAP
456
457 #endif // wxUSE_GUI
458
459 // include old wxCharsetToCodepage() by OK if needed
460 #if !wxUSE_GUI || !wxUSE_FONTMAP
461
462 #include "wx/msw/registry.h"
463
464 // this should work if Internet Exploiter is installed
465 extern long wxCharsetToCodepage(const wxChar *name)
466 {
467 if (!name)
468 return GetACP();
469
470 long CP=-1;
471
472 wxString cn(name);
473 do {
474 wxString path(wxT("MIME\\Database\\Charset\\"));
475 path += cn;
476 wxRegKey key(wxRegKey::HKCR, path);
477
478 if (!key.Exists()) break;
479
480 // two cases: either there's an AliasForCharset string,
481 // or there are Codepage and InternetEncoding dwords.
482 // The InternetEncoding gives us the actual encoding,
483 // the Codepage just says which Windows character set to
484 // use when displaying the data.
485 if (key.HasValue(wxT("InternetEncoding")) &&
486 key.QueryValue(wxT("InternetEncoding"), &CP)) break;
487
488 // no encoding, see if it's an alias
489 if (!key.HasValue(wxT("AliasForCharset")) ||
490 !key.QueryValue(wxT("AliasForCharset"), cn)) break;
491 } while (1);
492
493 return CP;
494 }
495
496 #endif // !wxUSE_GUI || !wxUSE_FONTMAP
497
498 #endif // Win32
499
500 // ============================================================================
501 // wxCharacterSet and derived classes
502 // ============================================================================
503
504 // ----------------------------------------------------------------------------
505 // wxCharacterSet is the ABC for the classes below
506 // ----------------------------------------------------------------------------
507
508 class wxCharacterSet
509 {
510 public:
511 wxCharacterSet(const wxChar*name) : cname(name) {}
512 virtual ~wxCharacterSet() {}
513 virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) = 0;
514 virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) = 0;
515 virtual bool usable() const = 0;
516 public:
517 const wxChar*cname;
518 };
519
520 // ----------------------------------------------------------------------------
521 // ID_CharSet: implementation of wxCharacterSet using an existing wxMBConv
522 // ----------------------------------------------------------------------------
523
524 class ID_CharSet : public wxCharacterSet
525 {
526 public:
527 ID_CharSet(const wxChar *name, wxMBConv *cnv)
528 : wxCharacterSet(name), work(cnv) {}
529
530 size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
531 { return work ? work->MB2WC(buf,psz,n) : (size_t)-1; }
532
533 size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
534 { return work ? work->WC2MB(buf,psz,n) : (size_t)-1; }
535
536 bool usable() const
537 { return work!=NULL; }
538 public:
539 wxMBConv*work;
540 };
541
542
543 // ============================================================================
544 // The classes doing conversion using the iconv_xxx() functions
545 // ============================================================================
546
547 #ifdef HAVE_ICONV
548
549 // VS: glibc 2.1.3 is broken in that iconv() conversion to/from UCS4 fails with E2BIG
550 // if output buffer is _exactly_ as big as needed. Such case is (unless there's
551 // yet another bug in glibc) the only case when iconv() returns with (size_t)-1
552 // (which means error) and says there are 0 bytes left in the input buffer --
553 // when _real_ error occurs, bytes-left-in-input buffer is non-zero. Hence,
554 // this alternative test for iconv() failure.
555 // [This bug does not appear in glibc 2.2.]
556 #if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ <= 1
557 #define ICONV_FAILED(cres, bufLeft) ((cres == (size_t)-1) && \
558 (errno != E2BIG || bufLeft != 0))
559 #else
560 #define ICONV_FAILED(cres, bufLeft) (cres == (size_t)-1)
561 #endif
562
563 #define ICONV_CHAR_CAST(x) ((ICONV_CONST char **)(x))
564
565 // ----------------------------------------------------------------------------
566 // IC_CharSet: encapsulates an iconv character set
567 // ----------------------------------------------------------------------------
568
569 class IC_CharSet : public wxCharacterSet
570 {
571 public:
572 IC_CharSet(const wxChar *name);
573 virtual ~IC_CharSet();
574
575 virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n);
576 virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n);
577
578 bool usable() const
579 { return (m2w != (iconv_t)-1) && (w2m != (iconv_t)-1); }
580
581 protected:
582 // the iconv handlers used to translate from multibyte to wide char and in
583 // the other direction
584 iconv_t m2w,
585 w2m;
586
587 private:
588 // the name (for iconv_open()) of a wide char charset - if none is
589 // available on this machine, it will remain NULL
590 static const char *ms_wcCharsetName;
591
592 // true if the wide char encoding we use (i.e. ms_wcCharsetName) has
593 // different endian-ness than the native one
594 static bool ms_wcNeedsSwap;
595 };
596
597 const char *IC_CharSet::ms_wcCharsetName = NULL;
598 bool IC_CharSet::ms_wcNeedsSwap = FALSE;
599
600 IC_CharSet::IC_CharSet(const wxChar *name)
601 : wxCharacterSet(name)
602 {
603 // check for charset that represents wchar_t:
604 if (ms_wcCharsetName == NULL)
605 {
606 ms_wcNeedsSwap = FALSE;
607
608 // try charset with explicit bytesex info (e.g. "UCS-4LE"):
609 ms_wcCharsetName = WC_NAME_BEST;
610 m2w = iconv_open(ms_wcCharsetName, wxConvLibc.cWX2MB(name));
611
612 if (m2w == (iconv_t)-1)
613 {
614 // try charset w/o bytesex info (e.g. "UCS4")
615 // and check for bytesex ourselves:
616 ms_wcCharsetName = WC_NAME;
617 m2w = iconv_open(ms_wcCharsetName, wxConvLibc.cWX2MB(name));
618
619 // last bet, try if it knows WCHAR_T pseudo-charset
620 if (m2w == (iconv_t)-1)
621 {
622 ms_wcCharsetName = "WCHAR_T";
623 m2w = iconv_open(ms_wcCharsetName, wxConvLibc.cWX2MB(name));
624 }
625
626 if (m2w != (iconv_t)-1)
627 {
628 char buf[2], *bufPtr;
629 wchar_t wbuf[2], *wbufPtr;
630 size_t insz, outsz;
631 size_t res;
632
633 buf[0] = 'A';
634 buf[1] = 0;
635 wbuf[0] = 0;
636 insz = 2;
637 outsz = SIZEOF_WCHAR_T * 2;
638 wbufPtr = wbuf;
639 bufPtr = buf;
640
641 res = iconv(m2w, ICONV_CHAR_CAST(&bufPtr), &insz,
642 (char**)&wbufPtr, &outsz);
643
644 if (ICONV_FAILED(res, insz))
645 {
646 ms_wcCharsetName = NULL;
647 wxLogLastError(wxT("iconv"));
648 wxLogError(_("Convertion to charset '%s' doesn't work."), name);
649 }
650 else
651 {
652 ms_wcNeedsSwap = wbuf[0] != (wchar_t)buf[0];
653 }
654 }
655 else
656 {
657 ms_wcCharsetName = NULL;
658
659 // VS: we must not output an error here, since wxWindows will safely
660 // fall back to using wxEncodingConverter.
661 wxLogTrace(wxT("strconv"), wxT("Impossible to convert to/from charset '%s' with iconv, falling back to wxEncodingConverter."), name);
662 //wxLogError(
663 }
664 }
665 wxLogTrace(wxT("strconv"), wxT("wchar_t charset is '%s', needs swap: %i"), ms_wcCharsetName, ms_wcNeedsSwap);
666 }
667 else // we already have ms_wcCharsetName
668 {
669 m2w = iconv_open(ms_wcCharsetName, wxConvLibc.cWX2MB(name));
670 }
671
672 // NB: don't ever pass NULL to iconv_open(), it may crash!
673 if ( ms_wcCharsetName )
674 {
675 w2m = iconv_open(wxConvLibc.cWX2MB(name), ms_wcCharsetName);
676 }
677 else
678 {
679 w2m = (iconv_t)-1;
680 }
681 }
682
683 IC_CharSet::~IC_CharSet()
684 {
685 if ( m2w != (iconv_t)-1 )
686 iconv_close(m2w);
687 if ( w2m != (iconv_t)-1 )
688 iconv_close(w2m);
689 }
690
691 size_t IC_CharSet::MB2WC(wchar_t *buf, const char *psz, size_t n)
692 {
693 size_t inbuf = strlen(psz);
694 size_t outbuf = n * SIZEOF_WCHAR_T;
695 size_t res, cres;
696 // VS: Use these instead of psz, buf because iconv() modifies its arguments:
697 wchar_t *bufPtr = buf;
698 const char *pszPtr = psz;
699
700 if (buf)
701 {
702 // have destination buffer, convert there
703 cres = iconv(m2w,
704 ICONV_CHAR_CAST(&pszPtr), &inbuf,
705 (char**)&bufPtr, &outbuf);
706 res = n - (outbuf / SIZEOF_WCHAR_T);
707
708 if (ms_wcNeedsSwap)
709 {
710 // convert to native endianness
711 WC_BSWAP(buf /* _not_ bufPtr */, res)
712 }
713 }
714 else
715 {
716 // no destination buffer... convert using temp buffer
717 // to calculate destination buffer requirement
718 wchar_t tbuf[8];
719 res = 0;
720 do {
721 bufPtr = tbuf;
722 outbuf = 8*SIZEOF_WCHAR_T;
723
724 cres = iconv(m2w,
725 ICONV_CHAR_CAST(&pszPtr), &inbuf,
726 (char**)&bufPtr, &outbuf );
727
728 res += 8-(outbuf/SIZEOF_WCHAR_T);
729 } while ((cres==(size_t)-1) && (errno==E2BIG));
730 }
731
732 if (ICONV_FAILED(cres, inbuf))
733 {
734 //VS: it is ok if iconv fails, hence trace only
735 wxLogTrace(wxT("strconv"), wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
736 return (size_t)-1;
737 }
738
739 return res;
740 }
741
742 size_t IC_CharSet::WC2MB(char *buf, const wchar_t *psz, size_t n)
743 {
744 #if defined(__BORLANDC__) && (__BORLANDC__ > 0x530)
745 size_t inbuf = std::wcslen(psz) * SIZEOF_WCHAR_T;
746 #else
747 size_t inbuf = ::wcslen(psz) * SIZEOF_WCHAR_T;
748 #endif
749 size_t outbuf = n;
750 size_t res, cres;
751
752 wchar_t *tmpbuf = 0;
753
754 if (ms_wcNeedsSwap)
755 {
756 // need to copy to temp buffer to switch endianness
757 // this absolutely doesn't rock!
758 // (no, doing WC_BSWAP twice on the original buffer won't help, as it
759 // could be in read-only memory, or be accessed in some other thread)
760 tmpbuf=(wchar_t*)malloc((inbuf+1)*SIZEOF_WCHAR_T);
761 memcpy(tmpbuf,psz,(inbuf+1)*SIZEOF_WCHAR_T);
762 WC_BSWAP(tmpbuf, inbuf)
763 psz=tmpbuf;
764 }
765
766 if (buf)
767 {
768 // have destination buffer, convert there
769 cres = iconv( w2m, ICONV_CHAR_CAST(&psz), &inbuf, &buf, &outbuf );
770
771 res = n-outbuf;
772 }
773 else
774 {
775 // no destination buffer... convert using temp buffer
776 // to calculate destination buffer requirement
777 char tbuf[16];
778 res = 0;
779 do {
780 buf = tbuf; outbuf = 16;
781
782 cres = iconv( w2m, ICONV_CHAR_CAST(&psz), &inbuf, &buf, &outbuf );
783
784 res += 16 - outbuf;
785 } while ((cres==(size_t)-1) && (errno==E2BIG));
786 }
787
788 if (ms_wcNeedsSwap)
789 {
790 free(tmpbuf);
791 }
792
793 if (ICONV_FAILED(cres, inbuf))
794 {
795 //VS: it is ok if iconv fails, hence trace only
796 wxLogTrace(wxT("strconv"), wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
797 return (size_t)-1;
798 }
799
800 return res;
801 }
802
803 #endif // HAVE_ICONV
804
805 // ============================================================================
806 // Win32 conversion classes
807 // ============================================================================
808
809 #if defined(__WIN32__) && !defined(__WXMICROWIN__)
810 class CP_CharSet : public wxCharacterSet
811 {
812 public:
813 CP_CharSet(const wxChar* name)
814 : wxCharacterSet(name)
815 {
816 m_CodePage = wxCharsetToCodepage(name);
817 }
818
819 size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
820 {
821 size_t len =
822 MultiByteToWideChar(m_CodePage, 0, psz, -1, buf, buf ? n : 0);
823 //VS: returns # of written chars for buf!=NULL and *size*
824 // needed buffer for buf==NULL
825 return len ? (buf ? len : len-1) : (size_t)-1;
826 }
827
828 size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
829 {
830 size_t len = WideCharToMultiByte(m_CodePage, 0, psz, -1, buf,
831 buf ? n : 0, NULL, NULL);
832 //VS: returns # of written chars for buf!=NULL and *size*
833 // needed buffer for buf==NULL
834 return len ? (buf ? len : len-1) : (size_t)-1;
835 }
836
837 bool usable() const
838 { return m_CodePage != -1; }
839
840 public:
841 long m_CodePage;
842 };
843 #endif // __WIN32__
844
845 // ============================================================================
846 // wxEncodingConverter based conversion classes
847 // ============================================================================
848
849 #if wxUSE_FONTMAP
850
851 class EC_CharSet : public wxCharacterSet
852 {
853 public:
854 // temporarily just use wxEncodingConverter stuff,
855 // so that it works while a better implementation is built
856 EC_CharSet(const wxChar* name) : wxCharacterSet(name),
857 enc(wxFONTENCODING_SYSTEM)
858 {
859 if (name)
860 enc = wxTheFontMapper->CharsetToEncoding(name, FALSE);
861
862 m_ok = m2w.Init(enc, wxFONTENCODING_UNICODE) &&
863 w2m.Init(wxFONTENCODING_UNICODE, enc);
864 }
865
866 size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
867 {
868 size_t inbuf = strlen(psz);
869 if (buf)
870 m2w.Convert(psz,buf);
871 return inbuf;
872 }
873
874 size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
875 {
876 #if ( defined(__BORLANDC__) && (__BORLANDC__ > 0x530) ) \
877 || ( defined(__MWERKS__) && defined(__WXMSW__) )
878 size_t inbuf = std::wcslen(psz);
879 #else
880 size_t inbuf = ::wcslen(psz);
881 #endif
882 if (buf)
883 w2m.Convert(psz,buf);
884
885 return inbuf;
886 }
887
888 bool usable() const { return m_ok; }
889
890 public:
891 wxFontEncoding enc;
892 wxEncodingConverter m2w, w2m;
893
894 // were we initialized successfully?
895 bool m_ok;
896 };
897
898 #endif // wxUSE_FONTMAP
899
900 // ----------------------------------------------------------------------------
901 // the function creating the wxCharacterSet for the specified charset on the
902 // current system, trying all possibilities
903 // ----------------------------------------------------------------------------
904
905 static wxCharacterSet *wxGetCharacterSet(const wxChar *name)
906 {
907 // check for the special case of ASCII charset
908 #if wxUSE_FONTMAP
909 if ( wxTheFontMapper->CharsetToEncoding(name) == wxFONTENCODING_DEFAULT )
910 #else // wxUSE_FONTMAP
911 if ( !name )
912 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
913 {
914 // don't convert at all
915 return NULL;
916 }
917
918 // the test above must have taken care of this case
919 wxCHECK_MSG( name, NULL, _T("NULL name must be wxFONTENCODING_DEFAULT") );
920
921 wxCharacterSet *cset;
922
923 if ( wxStricmp(name, wxT("UTF8")) == 0 || wxStricmp(name, wxT("UTF-8")) == 0)
924 {
925 cset = new ID_CharSet(name, &wxConvUTF8);
926 }
927 else
928 {
929 #ifdef HAVE_ICONV
930 cset = new IC_CharSet(name);
931 #else // !HAVE_ICONV
932 cset = NULL;
933 #endif // HAVE_ICONV/!HAVE_ICONV
934 }
935
936 if ( cset->usable() )
937 return cset;
938
939 delete cset;
940 cset = NULL;
941
942 #if defined(__WIN32__) && !defined(__WXMICROWIN__)
943 cset = new CP_CharSet(name);
944 if ( cset->usable() )
945 return cset;
946
947 delete cset;
948 cset = NULL;
949 #endif // __WIN32__
950
951 #if wxUSE_FONTMAP
952 cset = new EC_CharSet(name);
953 if ( cset->usable() )
954 return cset;
955
956 delete cset;
957 cset = NULL;
958 #endif // wxUSE_FONTMAP
959
960 wxLogError(_("Cannot convert from encoding '%s'!"), name);
961
962 return NULL;
963 }
964
965 // ============================================================================
966 // wxCSConv implementation
967 // ============================================================================
968
969 wxCSConv::wxCSConv(const wxChar *charset)
970 {
971 m_name = (wxChar *)NULL;
972 m_cset = (wxCharacterSet *) NULL;
973 m_deferred = TRUE;
974
975 SetName(charset);
976 }
977
978 wxCSConv::~wxCSConv()
979 {
980 free(m_name);
981 delete m_cset;
982 }
983
984 void wxCSConv::SetName(const wxChar *charset)
985 {
986 if (charset)
987 {
988 m_name = wxStrdup(charset);
989 m_deferred = TRUE;
990 }
991 }
992
993 void wxCSConv::LoadNow()
994 {
995 if (m_deferred)
996 {
997 if ( !m_name )
998 {
999 wxString name = wxLocale::GetSystemEncodingName();
1000 if ( !name.empty() )
1001 SetName(name);
1002 }
1003
1004 // wxGetCharacterSet() complains about NULL name
1005 m_cset = m_name ? wxGetCharacterSet(m_name) : NULL;
1006 m_deferred = FALSE;
1007 }
1008 }
1009
1010 size_t wxCSConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1011 {
1012 ((wxCSConv *)this)->LoadNow(); // discard constness
1013
1014 if (m_cset)
1015 return m_cset->MB2WC(buf, psz, n);
1016
1017 // latin-1 (direct)
1018 size_t len = strlen(psz);
1019
1020 if (buf)
1021 {
1022 for (size_t c = 0; c <= len; c++)
1023 buf[c] = (unsigned char)(psz[c]);
1024 }
1025
1026 return len;
1027 }
1028
1029 size_t wxCSConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1030 {
1031 ((wxCSConv *)this)->LoadNow(); // discard constness
1032
1033 if (m_cset)
1034 return m_cset->WC2MB(buf, psz, n);
1035
1036 // latin-1 (direct)
1037 #if ( defined(__BORLANDC__) && (__BORLANDC__ > 0x530) ) \
1038 || ( defined(__MWERKS__) && defined(__WXMSW__) )
1039 size_t len=std::wcslen(psz);
1040 #else
1041 size_t len=::wcslen(psz);
1042 #endif
1043 if (buf)
1044 {
1045 for (size_t c = 0; c <= len; c++)
1046 buf[c] = (psz[c] > 0xff) ? '?' : psz[c];
1047 }
1048
1049 return len;
1050 }
1051
1052 #else // !wxUSE_WCHAR_T
1053
1054 // ----------------------------------------------------------------------------
1055 // stand-ins in absence of wchar_t
1056 // ----------------------------------------------------------------------------
1057
1058 WXDLLEXPORT_DATA(wxMBConv) wxConvLibc, wxConvFile;
1059
1060 #endif // wxUSE_WCHAR_T
1061
1062
wxWidgets (Impactor)