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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
5 // Modified by:
6 // Created: 29/01/98
7 // RCS-ID: $Id$
8 // Copyright: (c) 1999 Ove Kaaven, Robert Roebling, Vadim Zeitlin
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 #ifdef __SALFORDC__
41 #include <clib.h>
42 #endif
43
44 #ifdef HAVE_ICONV_H
45 #include <iconv.h>
46 #endif
47 #ifdef HAVE_LANGINFO_H
48 #include <langinfo.h>
49 #endif
50
51 #ifdef __WXMSW__
52 #include <windows.h>
53 #endif
54
55 #include "wx/debug.h"
56 #include "wx/strconv.h"
57 #include "wx/intl.h"
58 #include "wx/log.h"
59
60 #if defined(WORDS_BIGENDIAN) || defined(__STDC_ISO_10646__)
61 #define BSWAP_UCS4(str, len)
62 #define BSWAP_UCS2(str, len)
63 #else
64 #define BSWAP_UCS4(str, len) { unsigned _c; for (_c=0; _c<len; _c++) str[_c]=wxUINT32_SWAP_ALWAYS(str[_c]); }
65 #define BSWAP_UCS2(str, len) { unsigned _c; for (_c=0; _c<len; _c++) str[_c]=wxUINT16_SWAP_ALWAYS(str[_c]); }
66 #define WC_NEED_BSWAP
67 #endif
68 #define BSWAP_UTF32(str, len) BSWAP_UCS4(str, len)
69 #define BSWAP_UTF16(str, len) BSWAP_UCS2(str, len)
70
71 #if SIZEOF_WCHAR_T == 4
72 #define WC_NAME "UCS4"
73 #define WC_BSWAP BSWAP_UCS4
74 #elif SIZEOF_WCHAR_T == 2
75 #define WC_NAME "UTF16"
76 #define WC_BSWAP BSWAP_UTF16
77 #define WC_UTF16
78 #endif
79
80 // ----------------------------------------------------------------------------
81 // globals
82 // ----------------------------------------------------------------------------
83
84 WXDLLEXPORT_DATA(wxMBConv *) wxConvCurrent = &wxConvLibc;
85
86 // ============================================================================
87 // implementation
88 // ============================================================================
89
90 #if wxUSE_WCHAR_T
91
92 #ifdef WC_UTF16
93
94 static size_t encode_utf16(wxUint32 input,wxUint16*output)
95 {
96 if (input<=0xffff)
97 {
98 if (output) *output++ = input;
99 return 1;
100 }
101 else if (input>=0x110000)
102 {
103 return (size_t)-1;
104 }
105 else
106 {
107 if (output)
108 {
109 *output++ = (input >> 10)+0xd7c0;
110 *output++ = (input&0x3ff)+0xdc00;
111 }
112 return 2;
113 }
114 }
115
116 static size_t decode_utf16(wxUint16*input,wxUint32&output)
117 {
118 if ((*input<0xd800) || (*input>0xdfff))
119 {
120 output = *input;
121 return 1;
122 }
123 else if ((input[1]<0xdc00) || (input[1]>=0xdfff))
124 {
125 output = *input;
126 return (size_t)-1;
127 }
128 else
129 {
130 output = ((input[0] - 0xd7c0) << 10) + (input[1] - 0xdc00);
131 return 2;
132 }
133 }
134
135 #endif // WC_UTF16
136
137 // ----------------------------------------------------------------------------
138 // wxMBConv
139 // ----------------------------------------------------------------------------
140
141 WXDLLEXPORT_DATA(wxMBConv) wxConvLibc;
142
143 size_t wxMBConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
144 {
145 return wxMB2WC(buf, psz, n);
146 }
147
148 size_t wxMBConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
149 {
150 return wxWC2MB(buf, psz, n);
151 }
152
153 const wxWCharBuffer wxMBConv::cMB2WC(const char *psz) const
154 {
155 if (psz)
156 {
157 size_t nLen = MB2WC((wchar_t *) NULL, psz, 0);
158 if (nLen == (size_t)-1)
159 return wxWCharBuffer((wchar_t *) NULL);
160 wxWCharBuffer buf(nLen);
161 MB2WC((wchar_t *)(const wchar_t *) buf, psz, nLen);
162 return buf;
163 }
164 else
165 return wxWCharBuffer((wchar_t *) NULL);
166 }
167
168 const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *psz) const
169 {
170 if (psz)
171 {
172 size_t nLen = WC2MB((char *) NULL, psz, 0);
173 if (nLen == (size_t)-1)
174 return wxCharBuffer((char *) NULL);
175 wxCharBuffer buf(nLen);
176 WC2MB((char *)(const char *) buf, psz, nLen);
177 return buf;
178 }
179 else
180 return wxCharBuffer((char *) NULL);
181 }
182
183 // ----------------------------------------------------------------------------
184 // standard file conversion
185 // ----------------------------------------------------------------------------
186
187 WXDLLEXPORT_DATA(wxMBConvFile) wxConvFile;
188
189 // just use the libc conversion for now
190 size_t wxMBConvFile::MB2WC(wchar_t *buf, const char *psz, size_t n) const
191 {
192 return wxMB2WC(buf, psz, n);
193 }
194
195 size_t wxMBConvFile::WC2MB(char *buf, const wchar_t *psz, size_t n) const
196 {
197 return wxWC2MB(buf, psz, n);
198 }
199
200 // ----------------------------------------------------------------------------
201 // standard gdk conversion
202 // ----------------------------------------------------------------------------
203
204 #ifdef __WXGTK12__
205
206 WXDLLEXPORT_DATA(wxMBConvGdk) wxConvGdk;
207
208 #include <gdk/gdk.h>
209
210 size_t wxMBConvGdk::MB2WC(wchar_t *buf, const char *psz, size_t n) const
211 {
212 if (buf)
213 {
214 return gdk_mbstowcs((GdkWChar *)buf, psz, n);
215 }
216 else
217 {
218 GdkWChar *nbuf = new GdkWChar[n=strlen(psz)];
219 size_t len = gdk_mbstowcs(nbuf, psz, n);
220 delete[] nbuf;
221 return len;
222 }
223 }
224
225 size_t wxMBConvGdk::WC2MB(char *buf, const wchar_t *psz, size_t n) const
226 {
227 char *mbstr = gdk_wcstombs((GdkWChar *)psz);
228 size_t len = mbstr ? strlen(mbstr) : 0;
229 if (buf)
230 {
231 if (len > n)
232 len = n;
233 memcpy(buf, psz, len);
234 if (len < n)
235 buf[len] = 0;
236 }
237 return len;
238 }
239
240 #endif // GTK > 1.0
241
242 // ----------------------------------------------------------------------------
243 // UTF-7
244 // ----------------------------------------------------------------------------
245
246 WXDLLEXPORT_DATA(wxMBConvUTF7) wxConvUTF7;
247
248 #if 0
249 static char utf7_setD[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
250 "abcdefghijklmnopqrstuvwxyz"
251 "0123456789'(),-./:?";
252 static char utf7_setO[]="!\"#$%&*;<=>@[]^_`{|}";
253 static char utf7_setB[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
254 "abcdefghijklmnopqrstuvwxyz"
255 "0123456789+/";
256 #endif
257
258 // TODO: write actual implementations of UTF-7 here
259 size_t wxMBConvUTF7::MB2WC(wchar_t * WXUNUSED(buf),
260 const char * WXUNUSED(psz),
261 size_t WXUNUSED(n)) const
262 {
263 return 0;
264 }
265
266 size_t wxMBConvUTF7::WC2MB(char * WXUNUSED(buf),
267 const wchar_t * WXUNUSED(psz),
268 size_t WXUNUSED(n)) const
269 {
270 return 0;
271 }
272
273 // ----------------------------------------------------------------------------
274 // UTF-8
275 // ----------------------------------------------------------------------------
276
277 WXDLLEXPORT_DATA(wxMBConvUTF8) wxConvUTF8;
278
279 static wxUint32 utf8_max[]=
280 { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff, 0xffffffff };
281
282 size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
283 {
284 size_t len = 0;
285
286 while (*psz && ((!buf) || (len < n)))
287 {
288 unsigned char cc = *psz++, fc = cc;
289 unsigned cnt;
290 for (cnt = 0; fc & 0x80; cnt++)
291 fc <<= 1;
292 if (!cnt)
293 {
294 // plain ASCII char
295 if (buf)
296 *buf++ = cc;
297 len++;
298 }
299 else
300 {
301 cnt--;
302 if (!cnt)
303 {
304 // invalid UTF-8 sequence
305 return (size_t)-1;
306 }
307 else
308 {
309 unsigned ocnt = cnt - 1;
310 wxUint32 res = cc & (0x3f >> cnt);
311 while (cnt--)
312 {
313 cc = *psz++;
314 if ((cc & 0xC0) != 0x80)
315 {
316 // invalid UTF-8 sequence
317 return (size_t)-1;
318 }
319 res = (res << 6) | (cc & 0x3f);
320 }
321 if (res <= utf8_max[ocnt])
322 {
323 // illegal UTF-8 encoding
324 return (size_t)-1;
325 }
326 #ifdef WC_UTF16
327 size_t pa = encode_utf16(res, buf);
328 if (pa == (size_t)-1)
329 return (size_t)-1;
330 if (buf)
331 buf += pa;
332 len += pa;
333 #else
334 if (buf)
335 *buf++ = res;
336 len++;
337 #endif
338 }
339 }
340 }
341 if (buf && (len < n))
342 *buf = 0;
343 return len;
344 }
345
346 size_t wxMBConvUTF8::WC2MB(char *buf, const wchar_t *psz, size_t n) const
347 {
348 size_t len = 0;
349
350 while (*psz && ((!buf) || (len < n)))
351 {
352 wxUint32 cc;
353 #ifdef WC_UTF16
354 size_t pa = decode_utf16(psz,cc);
355 psz += (pa == (size_t)-1) ? 1 : pa;
356 #else
357 cc=(*psz++) & 0x7fffffff;
358 #endif
359 unsigned cnt;
360 for (cnt = 0; cc > utf8_max[cnt]; cnt++) {}
361 if (!cnt)
362 {
363 // plain ASCII char
364 if (buf)
365 *buf++ = cc;
366 len++;
367 }
368
369 else
370 {
371 len += cnt + 1;
372 if (buf)
373 {
374 *buf++ = (-128 >> cnt) | ((cc >> (cnt * 6)) & (0x3f >> cnt));
375 while (cnt--)
376 *buf++ = 0x80 | ((cc >> (cnt * 6)) & 0x3f);
377 }
378 }
379 }
380
381 if (buf && (len<n)) *buf = 0;
382 return len;
383 }
384
385 // ----------------------------------------------------------------------------
386 // specified character set
387 // ----------------------------------------------------------------------------
388
389 WXDLLEXPORT_DATA(wxCSConv) wxConvLocal((const wxChar *)NULL);
390
391 #include "wx/encconv.h"
392 #include "wx/fontmap.h"
393
394 // TODO: add some tables here
395 // - perhaps common encodings to common codepages (for Win32)
396 // - perhaps common encodings to objects ("UTF8" -> wxConvUTF8)
397 // - move wxEncodingConverter meat in here
398
399 #ifdef __WIN32__
400 #include "wx/msw/registry.h"
401 // this should work if M$ Internet Exploiter is installed
402 static long CharsetToCodepage(const wxChar *name)
403 {
404 if (!name)
405 return GetACP();
406
407 long CP=-1;
408
409 wxString cn(name);
410 do {
411 wxString path(wxT("MIME\\Database\\Charset\\"));
412 path += cn;
413 wxRegKey key(wxRegKey::HKCR, path);
414
415 if (!key.Exists()) continue;
416
417 // two cases: either there's an AliasForCharset string,
418 // or there are Codepage and InternetEncoding dwords.
419 // The InternetEncoding gives us the actual encoding,
420 // the Codepage just says which Windows character set to
421 // use when displaying the data.
422 if (key.HasValue(wxT("InternetEncoding")) &&
423 key.QueryValue(wxT("InternetEncoding"), &CP)) break;
424
425 // no encoding, see if it's an alias
426 if (!key.HasValue(wxT("AliasForCharset")) ||
427 !key.QueryValue(wxT("AliasForCharset"), cn)) break;
428 } while (1);
429
430 return CP;
431 }
432 #endif
433
434 class wxCharacterSet
435 {
436 public:
437 wxCharacterSet(const wxChar*name)
438 : cname(name) {}
439 virtual ~wxCharacterSet()
440 {}
441 virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
442 { return (size_t)-1; }
443 virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
444 { return (size_t)-1; }
445 virtual bool usable()
446 { return FALSE; }
447 public:
448 const wxChar*cname;
449 };
450
451 class ID_CharSet : public wxCharacterSet
452 {
453 public:
454 ID_CharSet(const wxChar *name,wxMBConv *cnv)
455 : wxCharacterSet(name), work(cnv) {}
456
457 size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
458 { return work ? work->MB2WC(buf,psz,n) : (size_t)-1; }
459
460 size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
461 { return work ? work->WC2MB(buf,psz,n) : (size_t)-1; }
462
463 bool usable()
464 { return work!=NULL; }
465 public:
466 wxMBConv*work;
467 };
468
469
470 #ifdef HAVE_ICONV_H
471
472 // VS: glibc 2.1.3 is broken in that iconv() conversion to/from UCS4 fails with E2BIG
473 // if output buffer is _exactly_ as big as needed. Such case is (unless there's
474 // yet another bug in glibc) the only case when iconv() returns with (size_t)-1
475 // (which means error) and says there are 0 bytes left in the input buffer --
476 // when _real_ error occurs, bytes-left-in-input buffer is non-zero. Hence,
477 // this alternative test for iconv() failure.
478 // [This bug does not appear in glibc 2.2.]
479 #if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ <= 1
480 #define ICONV_FAILED(cres, bufLeft) ((cres == (size_t)-1) && \
481 (errno != E2BIG || bufLeft != 0))
482 #else
483 #define ICONV_FAILED(cres, bufLeft) (cres == (size_t)-1)
484 #endif
485
486 class IC_CharSet : public wxCharacterSet
487 {
488 public:
489 IC_CharSet(const wxChar *name)
490 : wxCharacterSet(name)
491 {
492 m2w = iconv_open(WC_NAME, wxConvLibc.cWX2MB(cname));
493 w2m = iconv_open(wxConvLibc.cWX2MB(cname), WC_NAME);
494 }
495
496 ~IC_CharSet()
497 {
498 if ( m2w != (iconv_t)-1 )
499 iconv_close(m2w);
500 if ( w2m != (iconv_t)-1 )
501 iconv_close(w2m);
502 }
503
504 size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
505 {
506 size_t inbuf = strlen(psz);
507 size_t outbuf = n * SIZEOF_WCHAR_T;
508 size_t res, cres;
509 // VS: Use these instead of psz, buf because iconv() modifies its arguments:
510 wchar_t *bufPtr = buf;
511 const char *pszPtr = psz;
512
513 if (buf)
514 {
515 // have destination buffer, convert there
516 #ifdef WX_ICONV_TAKES_CHAR
517 cres = iconv(m2w, (char**)&pszPtr, &inbuf, (char**)&bufPtr, &outbuf);
518 #else
519 cres = iconv(m2w, &pszPtr, &inbuf, (char**)&bufPtr, &outbuf);
520 #endif
521 res = n - (outbuf / SIZEOF_WCHAR_T);
522 // convert to native endianness
523 #ifdef WC_NEED_BSWAP
524 WC_BSWAP(buf /* _not_ bufPtr */, res)
525 #endif
526 }
527 else
528 {
529 // no destination buffer... convert using temp buffer
530 // to calculate destination buffer requirement
531 wchar_t tbuf[8];
532 res = 0;
533 do {
534 bufPtr = tbuf; outbuf = 8*SIZEOF_WCHAR_T;
535 #ifdef WX_ICONV_TAKES_CHAR
536 cres = iconv( m2w, (char**)&pszPtr, &inbuf, (char**)&bufPtr, &outbuf );
537 #else
538 cres = iconv( m2w, &pszPtr, &inbuf, (char**)&bufPtr, &outbuf );
539 #endif
540 res += 8-(outbuf/SIZEOF_WCHAR_T);
541 } while ((cres==(size_t)-1) && (errno==E2BIG));
542 }
543
544 if (ICONV_FAILED(cres, inbuf))
545 return (size_t)-1;
546
547 return res;
548 }
549
550 size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
551 {
552 #if defined(__BORLANDC__) && (__BORLANDC__ > 0x530)
553 size_t inbuf = std::wcslen(psz) * SIZEOF_WCHAR_T;
554 #else
555 size_t inbuf = ::wcslen(psz) * SIZEOF_WCHAR_T;
556 #endif
557 size_t outbuf = n;
558 size_t res, cres;
559
560 #ifdef WC_NEED_BSWAP
561 // need to copy to temp buffer to switch endianness
562 // this absolutely doesn't rock!
563 // (no, doing WC_BSWAP twice on the original buffer won't help, as it
564 // could be in read-only memory, or be accessed in some other thread)
565 wchar_t *tmpbuf=(wchar_t*)malloc((inbuf+1)*SIZEOF_WCHAR_T);
566 memcpy(tmpbuf,psz,(inbuf+1)*SIZEOF_WCHAR_T);
567 WC_BSWAP(tmpbuf, inbuf)
568 psz=tmpbuf;
569 #endif
570 if (buf)
571 {
572 // have destination buffer, convert there
573 #ifdef WX_ICONV_TAKES_CHAR
574 cres = iconv( w2m, (char**)&psz, &inbuf, &buf, &outbuf );
575 #else
576 cres = iconv( w2m, (const char**)&psz, &inbuf, &buf, &outbuf );
577 #endif
578 res = n-outbuf;
579 }
580 else
581 {
582 // no destination buffer... convert using temp buffer
583 // to calculate destination buffer requirement
584 char tbuf[16];
585 res = 0;
586 do {
587 buf = tbuf; outbuf = 16;
588 #ifdef WX_ICONV_TAKES_CHAR
589 cres = iconv( w2m, (char**)&psz, &inbuf, &buf, &outbuf );
590 #else
591 cres = iconv( w2m, (const char**)&psz, &inbuf, &buf, &outbuf );
592 #endif
593 res += 16 - outbuf;
594 } while ((cres==(size_t)-1) && (errno==E2BIG));
595 }
596 #ifdef WC_NEED_BSWAP
597 free(tmpbuf);
598 #endif
599 if (ICONV_FAILED(cres, inbuf))
600 return (size_t)-1;
601
602 return res;
603 }
604
605 bool usable()
606 { return (m2w != (iconv_t)-1) && (w2m != (iconv_t)-1); }
607
608 public:
609 iconv_t m2w, w2m;
610 };
611 #endif
612
613 #ifdef __WIN32__
614 class CP_CharSet : public wxCharacterSet
615 {
616 public:
617 CP_CharSet(const wxChar*name)
618 : wxCharacterSet(name), CodePage(CharsetToCodepage(name)) {}
619
620 size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
621 {
622 size_t len =
623 MultiByteToWideChar(CodePage, 0, psz, -1, buf, buf ? n : 0);
624 return len ? len : (size_t)-1;
625 }
626
627 size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
628 {
629 size_t len = WideCharToMultiByte(CodePage, 0, psz, -1, buf,
630 buf ? n : 0, NULL, NULL);
631 return len ? len : (size_t)-1;
632 }
633
634 bool usable()
635 { return CodePage != -1; }
636
637 public:
638 long CodePage;
639 };
640 #endif
641
642 class EC_CharSet : public wxCharacterSet
643 {
644 public:
645 // temporarily just use wxEncodingConverter stuff,
646 // so that it works while a better implementation is built
647 EC_CharSet(const wxChar*name) : wxCharacterSet(name),
648 enc(wxFONTENCODING_SYSTEM)
649 {
650 if (name)
651 enc = wxTheFontMapper->CharsetToEncoding(name, FALSE);
652 m2w.Init(enc, wxFONTENCODING_UNICODE);
653 w2m.Init(wxFONTENCODING_UNICODE, enc);
654 }
655
656 size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
657 {
658 size_t inbuf = strlen(psz);
659 if (buf)
660 m2w.Convert(psz,buf);
661 return inbuf;
662 }
663
664 size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
665 {
666 #if defined(__BORLANDC__) && (__BORLANDC__ > 0x530)
667 size_t inbuf = std::wcslen(psz);
668 #else
669 size_t inbuf = ::wcslen(psz);
670 #endif
671 if (buf)
672 w2m.Convert(psz,buf);
673
674 return inbuf;
675 }
676
677 bool usable()
678 { return (enc!=wxFONTENCODING_SYSTEM) && (enc!=wxFONTENCODING_DEFAULT); }
679
680 public:
681 wxFontEncoding enc;
682 wxEncodingConverter m2w, w2m;
683 };
684
685 static wxCharacterSet *wxGetCharacterSet(const wxChar *name)
686 {
687 wxCharacterSet *cset = NULL;
688 if (name)
689 {
690 if (wxStricmp(name, wxT("UTF8")) == 0 || wxStricmp(name, wxT("UTF-8")) == 0)
691 {
692 cset = new ID_CharSet(name, &wxConvUTF8);
693 }
694 else
695 {
696 #ifdef HAVE_ICONV_H
697 cset = new IC_CharSet(name); // may not take NULL
698 #endif
699 }
700 }
701
702 if (cset && cset->usable()) return cset;
703 if (cset) delete cset;
704 cset = NULL;
705 #ifdef __WIN32__
706 cset = new CP_CharSet(name); // may take NULL
707 if (cset->usable()) return cset;
708 #endif
709 if (cset) delete cset;
710 cset = new EC_CharSet(name);
711 if (cset->usable()) return cset;
712 delete cset;
713 wxLogError(_("Unknown encoding '%s'!"), name);
714 return NULL;
715 }
716
717 wxCSConv::wxCSConv(const wxChar *charset)
718 {
719 m_name = (wxChar *) NULL;
720 m_cset = (wxCharacterSet *) NULL;
721 m_deferred = TRUE;
722 SetName(charset);
723 }
724
725 wxCSConv::~wxCSConv()
726 {
727 if (m_name) free(m_name);
728 if (m_cset) delete m_cset;
729 }
730
731 void wxCSConv::SetName(const wxChar *charset)
732 {
733 if (charset)
734 {
735 m_name = wxStrdup(charset);
736 m_deferred = TRUE;
737 }
738 }
739
740 void wxCSConv::LoadNow()
741 {
742 if (m_deferred)
743 {
744 if (!m_name)
745 {
746 #ifdef __UNIX__
747 #if defined(HAVE_LANGINFO_H) && defined(CODESET)
748 // GNU libc provides current character set this way
749 char *alang = nl_langinfo(CODESET);
750 if (alang)
751 {
752 SetName(wxConvLibc.cMB2WX(alang));
753 }
754 else
755 #endif
756 {
757 // if we can't get at the character set directly,
758 // try to see if it's in the environment variables
759 // (in most cases this won't work, but I was out of ideas)
760 wxChar *lang = wxGetenv(wxT("LC_ALL"));
761 wxChar *dot = lang ? wxStrchr(lang, wxT('.')) : (wxChar *)NULL;
762 if (!dot)
763 {
764 lang = wxGetenv(wxT("LC_CTYPE"));
765 dot = lang ? wxStrchr(lang, wxT('.')) : (wxChar *)NULL;
766 }
767 if (!dot)
768 {
769 lang = wxGetenv(wxT("LANG"));
770 dot = lang ? wxStrchr(lang, wxT('.')) : (wxChar *)NULL;
771 }
772 if (dot)
773 SetName(dot+1);
774 }
775 #endif
776 }
777 m_cset = wxGetCharacterSet(m_name);
778 m_deferred = FALSE;
779 }
780 }
781
782 size_t wxCSConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
783 {
784 ((wxCSConv *)this)->LoadNow(); // discard constness
785
786 if (m_cset)
787 return m_cset->MB2WC(buf, psz, n);
788
789 // latin-1 (direct)
790 size_t len = strlen(psz);
791
792 if (buf)
793 {
794 for (size_t c = 0; c <= len; c++)
795 buf[c] = (unsigned char)(psz[c]);
796 }
797
798 return len;
799 }
800
801 size_t wxCSConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
802 {
803 ((wxCSConv *)this)->LoadNow(); // discard constness
804
805 if (m_cset)
806 return m_cset->WC2MB(buf, psz, n);
807
808 // latin-1 (direct)
809 #if defined(__BORLANDC__) && (__BORLANDC__ > 0x530)
810 size_t len=std::wcslen(psz);
811 #else
812 size_t len=::wcslen(psz);
813 #endif
814 if (buf)
815 {
816 for (size_t c = 0; c <= len; c++)
817 buf[c] = (psz[c] > 0xff) ? '?' : psz[c];
818 }
819
820 return len;
821 }
822
823 #ifdef HAVE_ICONV_H
824 class IC_CharSetConverter
825 {
826 public:
827 IC_CharSetConverter(IC_CharSet *from, IC_CharSet *to)
828 {
829 cnv = iconv_open(wxConvLibc.cWX2MB(to->cname),
830 wxConvLibc.cWX2MB(from->cname));
831 }
832
833 ~IC_CharSetConverter()
834 {
835 if (cnv != (iconv_t)-1)
836 iconv_close(cnv);
837 }
838
839 size_t Convert(char *buf, const char *psz, size_t n)
840 {
841 size_t inbuf = strlen(psz);
842 size_t outbuf = n;
843 #ifdef WX_ICONV_TAKES_CHAR
844 size_t res = iconv( cnv, (char**)&psz, &inbuf, &buf, &outbuf );
845 #else
846 size_t res = iconv( cnv, &psz, &inbuf, &buf, &outbuf );
847 #endif
848 if (res == (size_t)-1)
849 return (size_t)-1;
850 return (n - outbuf);
851 }
852
853 public:
854 iconv_t cnv;
855 };
856 #endif
857
858 class EC_CharSetConverter
859 {
860 public:
861 EC_CharSetConverter(EC_CharSet*from,EC_CharSet*to)
862 { cnv.Init(from->enc,to->enc); }
863
864 size_t Convert(char*buf, const char*psz, size_t n)
865 {
866 size_t inbuf = strlen(psz);
867 if (buf) cnv.Convert(psz,buf);
868 return inbuf;
869 }
870
871 public:
872 wxEncodingConverter cnv;
873 };
874
875 #else // !wxUSE_WCHAR_T
876
877 // ----------------------------------------------------------------------------
878 // stand-ins in absence of wchar_t
879 // ----------------------------------------------------------------------------
880
881 WXDLLEXPORT_DATA(wxMBConv) wxConvLibc, wxConvFile;
882
883 #endif // wxUSE_WCHAR_T
884
885
wxWidgets (Impactor)