src/common/wxcrt.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/wxcrt.cpp
   3 // Purpose:     wxChar CRT wrappers implementation
   4 // Author:      Ove Kaven
   5 // Modified by: Ron Lee, Francesco Montorsi
   6 // Created:     09/04/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets copyright
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // headers, declarations, constants
  14 // ===========================================================================
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #include "wx/crt.h"
  24 #include "wx/strconv.h" // wxMBConv::cWC2MB()
  25
  26 #define _ISOC9X_SOURCE 1 // to get vsscanf()
  27 #define _BSD_SOURCE    1 // to still get strdup()
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #ifndef __WXPALMOS5__
  34 #ifndef __WXWINCE__
  35     #include <time.h>
  36     #include <locale.h>
  37 #else
  38     #include "wx/msw/wince/time.h"
  39 #endif
  40 #endif // !__WXPALMOS5__
  41
  42 #ifndef WX_PRECOMP
  43     #include "wx/string.h"
  44     #include "wx/hash.h"
  45     #include "wx/utils.h"     // for wxMin and wxMax
  46     #include "wx/log.h"
  47 #endif
  48
  49 #ifdef HAVE_LANGINFO_H
  50     #include <langinfo.h>
  51 #endif
  52
  53 #ifdef __WXWINCE__
  54     // there is no errno.h under CE apparently
  55     #define wxSET_ERRNO(value)
  56 #else
  57     #include <errno.h>
  58
  59     #define wxSET_ERRNO(value) errno = value
  60 #endif
  61
  62 #if defined(__MWERKS__) && __MSL__ >= 0x6000
  63 namespace std {}
  64 using namespace std ;
  65 #endif
  66
  67 #if defined(__DARWIN__)
  68         #include "wx/mac/corefoundation/cfref.h"
  69         #include <CoreFoundation/CFLocale.h>
  70         #include "wx/mac/corefoundation/cfstring.h"
  71     #include <xlocale.h>
  72 #endif
  73
  74 #if wxUSE_WCHAR_T
  75 WXDLLIMPEXP_BASE size_t wxMB2WC(wchar_t *buf, const char *psz, size_t n)
  76 {
  77   // assume that we have mbsrtowcs() too if we have wcsrtombs()
  78 #ifdef HAVE_WCSRTOMBS
  79   mbstate_t mbstate;
  80   memset(&mbstate, 0, sizeof(mbstate_t));
  81 #endif
  82
  83   if (buf) {
  84     if (!n || !*psz) {
  85       if (n) *buf = wxT('\0');
  86       return 0;
  87     }
  88 #ifdef HAVE_WCSRTOMBS
  89     return mbsrtowcs(buf, &psz, n, &mbstate);
  90 #else
  91     return wxMbstowcs(buf, psz, n);
  92 #endif
  93   }
  94
  95   // note that we rely on common (and required by Unix98 but unfortunately not
  96   // C99) extension which allows to call mbs(r)towcs() with NULL output pointer
  97   // to just get the size of the needed buffer -- this is needed as otherwise
  98   // we have no idea about how much space we need and if the CRT doesn't
  99   // support it (the only currently known example being Metrowerks, see
 100   // wx/crt.h) we don't use its mbstowcs() at all
 101 #ifdef HAVE_WCSRTOMBS
 102   return mbsrtowcs((wchar_t *) NULL, &psz, 0, &mbstate);
 103 #else
 104   return wxMbstowcs((wchar_t *) NULL, psz, 0);
 105 #endif
 106 }
 107
 108 WXDLLIMPEXP_BASE size_t wxWC2MB(char *buf, const wchar_t *pwz, size_t n)
 109 {
 110 #ifdef HAVE_WCSRTOMBS
 111   mbstate_t mbstate;
 112   memset(&mbstate, 0, sizeof(mbstate_t));
 113 #endif
 114
 115   if (buf) {
 116     if (!n || !*pwz) {
 117       // glibc2.1 chokes on null input
 118       if (n) *buf = '\0';
 119       return 0;
 120     }
 121 #ifdef HAVE_WCSRTOMBS
 122     return wcsrtombs(buf, &pwz, n, &mbstate);
 123 #else
 124     return wxWcstombs(buf, pwz, n);
 125 #endif
 126   }
 127
 128 #ifdef HAVE_WCSRTOMBS
 129   return wcsrtombs((char *) NULL, &pwz, 0, &mbstate);
 130 #else
 131   return wxWcstombs((char *) NULL, pwz, 0);
 132 #endif
 133 }
 134 #endif // wxUSE_WCHAR_T
 135
 136 WXDLLIMPEXP_BASE bool wxOKlibc()
 137 {
 138 #if wxUSE_WCHAR_T && defined(__UNIX__) && defined(__GLIBC__) && !defined(__WINE__)
 139   // glibc 2.0 uses UTF-8 even when it shouldn't
 140   wchar_t res = 0;
 141   if ((MB_CUR_MAX == 2) &&
 142       (wxMB2WC(&res, "\xdd\xa5", 1) == 1) &&
 143       (res==0x765)) {
 144     // this is UTF-8 allright, check whether that's what we want
 145     char *cur_locale = setlocale(LC_CTYPE, NULL);
 146     if ((strlen(cur_locale) < 4) ||
 147             (strcasecmp(cur_locale + strlen(cur_locale) - 4, "utf8")) ||
 148             (strcasecmp(cur_locale + strlen(cur_locale) - 5, "utf-8"))) {
 149       // nope, don't use libc conversion
 150       return false;
 151     }
 152   }
 153 #endif
 154   return true;
 155 }
 156
 157 char* wxSetlocale(int category, const char *locale)
 158 {
 159 #ifdef __WXWINCE__
 160     // FIXME-CE: there is no setlocale() in CE CRT, use SetThreadLocale()?
 161     wxUnusedVar(category);
 162     wxUnusedVar(locale);
 163
 164     return NULL;
 165 #else // !__WXWINCE__
 166 #ifdef __WXMAC__
 167     char *rv = NULL ;
 168     if ( locale != NULL && locale[0] == 0 )
 169     {
 170         // the attempt to use newlocale(LC_ALL_MASK, "", NULL);
 171         // here in order to deduce the language along the environment vars rules
 172         // lead to strange crashes later...
 173
 174         // we have to emulate the behaviour under OS X
 175         wxCFRef<CFLocaleRef> userLocaleRef(CFLocaleCopyCurrent());
 176         wxCFStringRef str(wxCFRetain((CFStringRef)CFLocaleGetValue(userLocaleRef, kCFLocaleLanguageCode)));
 177         wxString langFull = str.AsString()+"_";
 178         str.reset(wxCFRetain((CFStringRef)CFLocaleGetValue(userLocaleRef, kCFLocaleCountryCode)));
 179         langFull += str.AsString();
 180         rv = setlocale(category, langFull.c_str());
 181     }
 182     else
 183         rv = setlocale(category, locale);
 184 #else
 185     char *rv = setlocale(category, locale);
 186 #endif
 187     if ( locale != NULL /* setting locale, not querying */ &&
 188          rv /* call was successful */ )
 189     {
 190         wxUpdateLocaleIsUtf8();
 191     }
 192     return rv;
 193 #endif // __WXWINCE__/!__WXWINCE__
 194 }
 195
 196 // ============================================================================
 197 // printf() functions business
 198 // ============================================================================
 199
 200 // special test mode: define all functions below even if we don't really need
 201 // them to be able to test them
 202 #ifdef wxTEST_PRINTF
 203     #undef wxFprintf
 204     #undef wxPrintf
 205     #undef wxSprintf
 206     #undef wxVfprintf
 207     #undef wxVsprintf
 208     #undef wxVprintf
 209     #undef wxVsnprintf_
 210
 211     #define wxNEED_WPRINTF
 212
 213     int wxCRT_VfprintfW( FILE *stream, const wchar_t *format, va_list argptr );
 214 #endif
 215
 216 #if defined(__DMC__)
 217 /* Digital Mars adds count to _stprintf (C99) so convert */
 218 int wxCRT_SprintfW (wchar_t * __RESTRICT s, const wchar_t * __RESTRICT format, ... )
 219 {
 220     va_list arglist;
 221
 222     va_start( arglist, format );
 223     int iLen = swprintf ( s, -1, format, arglist );
 224     va_end( arglist );
 225     return iLen ;
 226 }
 227 #endif //__DMC__
 228
 229 // ----------------------------------------------------------------------------
 230 // implement the standard IO functions for wide char if libc doesn't have them
 231 // ----------------------------------------------------------------------------
 232
 233 #ifndef wxCRT_FputsW
 234 int wxCRT_FputsW(const wchar_t *ws, FILE *stream)
 235 {
 236     wxCharBuffer buf(wxConvLibc.cWC2MB(ws));
 237     if ( !buf )
 238         return -1;
 239
 240     // counting the number of wide characters written isn't worth the trouble,
 241     // simply distinguish between ok and error
 242     return wxCRT_FputsA(buf, stream) == -1 ? -1 : 0;
 243 }
 244 #endif // !wxCRT_FputsW
 245
 246 #ifndef wxCRT_PutsW
 247 int wxCRT_PutsW(const wchar_t *ws)
 248 {
 249     int rc = wxCRT_FputsW(ws, stdout);
 250     if ( rc != -1 )
 251     {
 252         if ( wxCRT_FputsW(L"\n", stdout) == -1 )
 253             return -1;
 254
 255         rc++;
 256     }
 257
 258     return rc;
 259 }
 260 #endif // !wxCRT_PutsW
 261
 262 #ifndef wxCRT_FputcW
 263 int /* not wint_t */ wxCRT_FputcW(wchar_t wc, FILE *stream)
 264 {
 265     wchar_t ws[2] = { wc, L'\0' };
 266
 267     return wxCRT_FputsW(ws, stream);
 268 }
 269 #endif // !wxCRT_FputcW
 270
 271 // NB: we only implement va_list functions here, the ones taking ... are
 272 //     defined below for wxNEED_PRINTF_CONVERSION case anyhow and we reuse
 273 //     the definitions there to avoid duplicating them here
 274 #ifdef wxNEED_WPRINTF
 275
 276 // TODO: implement the scanf() functions
 277 static int vwscanf(const wchar_t *format, va_list argptr)
 278 {
 279     wxFAIL_MSG( _T("TODO") );
 280
 281     return -1;
 282 }
 283
 284 static int vswscanf(const wchar_t *ws, const wchar_t *format, va_list argptr)
 285 {
 286     // The best we can do without proper Unicode support in glibc is to
 287     // convert the strings into MB representation and run ANSI version
 288     // of the function. This doesn't work with %c and %s because of difference
 289     // in size of char and wchar_t, though.
 290
 291     wxCHECK_MSG( wxStrstr(format, _T("%s")) == NULL, -1,
 292                  _T("incomplete vswscanf implementation doesn't allow %s") );
 293     wxCHECK_MSG( wxStrstr(format, _T("%c")) == NULL, -1,
 294                  _T("incomplete vswscanf implementation doesn't allow %c") );
 295
 296     return vsscanf(wxConvLibc.cWX2MB(ws), wxConvLibc.cWX2MB(format), argptr);
 297 }
 298
 299 static int vfwscanf(FILE *stream, const wchar_t *format, va_list argptr)
 300 {
 301     wxFAIL_MSG( _T("TODO") );
 302
 303     return -1;
 304 }
 305
 306 #define vswprintf wxCRT_VsnprintfW
 307
 308 static int vfwprintf(FILE *stream, const wchar_t *format, va_list argptr)
 309 {
 310     wxString s;
 311     int rc = s.PrintfV(format, argptr);
 312
 313     if ( rc != -1 )
 314     {
 315         // we can't do much better without Unicode support in libc...
 316         if ( fprintf(stream, "%s", (const char*)s.mb_str() ) == -1 )
 317             return -1;
 318     }
 319
 320     return rc;
 321 }
 322
 323 static int vwprintf(const wchar_t *format, va_list argptr)
 324 {
 325     return wxCRT_VfprintfW(stdout, format, argptr);
 326 }
 327
 328 #endif // wxNEED_WPRINTF
 329
 330 // ----------------------------------------------------------------------------
 331 // wxPrintf(), wxScanf() and relatives
 332 // ----------------------------------------------------------------------------
 333
 334 // FIXME-UTF8: do format conversion using (modified) wxFormatConverter in
 335 //             template wrappers, not here; note that it will needed to
 336 //             translate all forms of string specifiers to %(l)s for wxPrintf(),
 337 //             but it only should do what it did in 2.8 for wxScanf()!
 338
 339 #ifndef wxCRT_PrintfW
 340 int wxCRT_PrintfW( const wchar_t *format, ... )
 341 {
 342     va_list argptr;
 343     va_start(argptr, format);
 344
 345     int ret = vwprintf( format, argptr );
 346
 347     va_end(argptr);
 348
 349     return ret;
 350 }
 351 #endif
 352
 353 #ifndef wxCRT_FprintfW
 354 int wxCRT_FprintfW( FILE *stream, const wchar_t *format, ... )
 355 {
 356     va_list argptr;
 357     va_start( argptr, format );
 358
 359     int ret = vfwprintf( stream, format, argptr );
 360
 361     va_end(argptr);
 362
 363     return ret;
 364 }
 365 #endif
 366
 367 #ifndef wxCRT_VfprintfW
 368 int wxCRT_VfprintfW( FILE *stream, const wchar_t *format, va_list argptr )
 369 {
 370     return vfwprintf( stream, format, argptr );
 371 }
 372 #endif
 373
 374 #ifndef wxCRT_VprintfW
 375 int wxCRT_VprintfW( const wchar_t *format, va_list argptr )
 376 {
 377     return vwprintf( format, argptr );
 378 }
 379 #endif
 380
 381 #ifndef wxCRT_VsprintfW
 382 int wxCRT_VsprintfW( wchar_t *str, const wchar_t *format, va_list argptr )
 383 {
 384     // same as for wxSprintf()
 385     return vswprintf(str, INT_MAX / 4, format, argptr);
 386 }
 387 #endif
 388
 389 #ifndef wxCRT_ScanfW
 390 int wxCRT_ScanfW(const wchar_t *format, ...)
 391 {
 392     va_list argptr;
 393     va_start(argptr, format);
 394
 395 #ifdef __VMS
 396 #if (__DECCXX_VER >= 70100000) && !defined(__STD_CFRONT) && !defined( __NONAMESPACE_STD )
 397    int ret = std::vwscanf(format, argptr);
 398 #else
 399    int ret = vwscanf(format, argptr);
 400 #endif
 401 #else
 402    int ret = vwscanf(format, argptr);
 403 #endif
 404
 405     va_end(argptr);
 406
 407     return ret;
 408 }
 409 #endif
 410
 411 #ifndef wxCRT_SscanfW
 412 int wxCRT_SscanfW(const wchar_t *str, const wchar_t *format, ...)
 413 {
 414     va_list argptr;
 415     va_start(argptr, format);
 416
 417 #ifdef __VMS
 418 #if (__DECCXX_VER >= 70100000) && !defined(__STD_CFRONT) && !defined( __NONAMESPACE_STD )
 419    int ret = std::vswscanf(str, format, argptr);
 420 #else
 421    int ret = vswscanf(str, format, argptr);
 422 #endif
 423 #else
 424    int ret = vswscanf(str, format, argptr);
 425 #endif
 426
 427     va_end(argptr);
 428
 429     return ret;
 430 }
 431 #endif
 432
 433 #ifndef wxCRT_FscanfW
 434 int wxCRT_FscanfW(FILE *stream, const wchar_t *format, ...)
 435 {
 436     va_list argptr;
 437     va_start(argptr, format);
 438 #ifdef __VMS
 439 #if (__DECCXX_VER >= 70100000) && !defined(__STD_CFRONT) && !defined( __NONAMESPACE_STD )
 440    int ret = std::vfwscanf(stream, format, argptr);
 441 #else
 442    int ret = vfwscanf(stream, format, argptr);
 443 #endif
 444 #else
 445    int ret = vfwscanf(stream, format, argptr);
 446 #endif
 447
 448     va_end(argptr);
 449
 450     return ret;
 451 }
 452 #endif
 453
 454 #ifndef wxCRT_VsscanfW
 455 int wxCRT_VsscanfW(const wchar_t *str, const wchar_t *format, va_list argptr)
 456 {
 457 #ifdef __VMS
 458 #if (__DECCXX_VER >= 70100000) && !defined(__STD_CFRONT) && !defined( __NONAMESPACE_STD )
 459    return std::vswscanf(str, format, argptr);
 460 #else
 461    return vswscanf(str, format, argptr);
 462 #endif
 463 #else
 464    return vswscanf(str, format, argptr);
 465 #endif
 466 }
 467 #endif
 468
 469
 470 // ----------------------------------------------------------------------------
 471 // wrappers to printf and scanf function families
 472 // ----------------------------------------------------------------------------
 473
 474 #if !wxUSE_UTF8_LOCALE_ONLY
 475 int wxDoSprintfWchar(char *str, const wxChar *format, ...)
 476 {
 477     va_list argptr;
 478     va_start(argptr, format);
 479
 480     int rv = wxVsprintf(str, format, argptr);
 481
 482     va_end(argptr);
 483     return rv;
 484 }
 485 #endif // !wxUSE_UTF8_LOCALE_ONLY
 486
 487 #if wxUSE_UNICODE_UTF8
 488 int wxDoSprintfUtf8(char *str, const char *format, ...)
 489 {
 490     va_list argptr;
 491     va_start(argptr, format);
 492
 493     int rv = wxVsprintf(str, format, argptr);
 494
 495     va_end(argptr);
 496     return rv;
 497 }
 498 #endif // wxUSE_UNICODE_UTF8
 499
 500 #if wxUSE_UNICODE
 501
 502 #if !wxUSE_UTF8_LOCALE_ONLY
 503 int wxDoSprintfWchar(wchar_t *str, const wxChar *format, ...)
 504 {
 505     va_list argptr;
 506     va_start(argptr, format);
 507
 508     int rv = wxVsprintf(str, format, argptr);
 509
 510     va_end(argptr);
 511     return rv;
 512 }
 513 #endif // !wxUSE_UTF8_LOCALE_ONLY
 514
 515 #if wxUSE_UNICODE_UTF8
 516 int wxDoSprintfUtf8(wchar_t *str, const char *format, ...)
 517 {
 518     va_list argptr;
 519     va_start(argptr, format);
 520
 521     int rv = wxVsprintf(str, format, argptr);
 522
 523     va_end(argptr);
 524     return rv;
 525 }
 526 #endif // wxUSE_UNICODE_UTF8
 527
 528 #endif // wxUSE_UNICODE
 529
 530 #if !wxUSE_UTF8_LOCALE_ONLY
 531 int wxDoSnprintfWchar(char *str, size_t size, const wxChar *format, ...)
 532 {
 533     va_list argptr;
 534     va_start(argptr, format);
 535
 536     int rv = wxVsnprintf(str, size, format, argptr);
 537
 538     va_end(argptr);
 539     return rv;
 540 }
 541 #endif // !wxUSE_UTF8_LOCALE_ONLY
 542
 543 #if wxUSE_UNICODE_UTF8
 544 int wxDoSnprintfUtf8(char *str, size_t size, const char *format, ...)
 545 {
 546     va_list argptr;
 547     va_start(argptr, format);
 548
 549     int rv = wxVsnprintf(str, size, format, argptr);
 550
 551     va_end(argptr);
 552     return rv;
 553 }
 554 #endif // wxUSE_UNICODE_UTF8
 555
 556 #if wxUSE_UNICODE
 557
 558 #if !wxUSE_UTF8_LOCALE_ONLY
 559 int wxDoSnprintfWchar(wchar_t *str, size_t size, const wxChar *format, ...)
 560 {
 561     va_list argptr;
 562     va_start(argptr, format);
 563
 564     int rv = wxVsnprintf(str, size, format, argptr);
 565
 566     va_end(argptr);
 567     return rv;
 568 }
 569 #endif // !wxUSE_UTF8_LOCALE_ONLY
 570
 571 #if wxUSE_UNICODE_UTF8
 572 int wxDoSnprintfUtf8(wchar_t *str, size_t size, const char *format, ...)
 573 {
 574     va_list argptr;
 575     va_start(argptr, format);
 576
 577     int rv = wxVsnprintf(str, size, format, argptr);
 578
 579     va_end(argptr);
 580     return rv;
 581 }
 582 #endif // wxUSE_UNICODE_UTF8
 583
 584 #endif // wxUSE_UNICODE
 585
 586
 587 #ifdef HAVE_BROKEN_VSNPRINTF_DECL
 588     #define vsnprintf wx_fixed_vsnprintf
 589 #endif
 590
 591 #if wxUSE_UNICODE
 592
 593 namespace
 594 {
 595
 596 #if !wxUSE_UTF8_LOCALE_ONLY
 597 int ConvertStringToBuf(const wxString& s, char *out, size_t outsize)
 598 {
 599     const wxWX2WCbuf buf = s.wc_str();
 600
 601     size_t len = wxConvLibc.FromWChar(out, outsize, buf);
 602     if ( len != wxCONV_FAILED )
 603         return len-1;
 604     else
 605         return wxConvLibc.FromWChar(NULL, 0, buf);
 606 }
 607 #endif // !wxUSE_UTF8_LOCALE_ONLY
 608
 609 #if wxUSE_UNICODE_UTF8
 610 int ConvertStringToBuf(const wxString& s, wchar_t *out, size_t outsize)
 611 {
 612     const wxWX2WCbuf buf(s.wc_str());
 613     size_t len = s.length(); // same as buf length for wchar_t*
 614     if ( outsize > len )
 615     {
 616         memcpy(out, buf, (len+1) * sizeof(wchar_t));
 617     }
 618     else // not enough space
 619     {
 620         memcpy(out, buf, (outsize-1) * sizeof(wchar_t));
 621         out[outsize-1] = 0;
 622     }
 623     return len;
 624 }
 625 #endif // wxUSE_UNICODE_UTF8
 626
 627 } // anonymous namespace
 628
 629 template<typename T>
 630 static size_t PrintfViaString(T *out, size_t outsize,
 631                               const wxString& format, va_list argptr)
 632 {
 633     wxString s;
 634     s.PrintfV(format, argptr);
 635
 636     return ConvertStringToBuf(s, out, outsize);
 637 }
 638 #endif // wxUSE_UNICODE
 639
 640 int wxVsprintf(char *str, const wxString& format, va_list argptr)
 641 {
 642 #if wxUSE_UTF8_LOCALE_ONLY
 643     return wxCRT_VsprintfA(str, format.wx_str(), argptr);
 644 #else
 645     #if wxUSE_UNICODE_UTF8
 646     if ( wxLocaleIsUtf8 )
 647         return wxCRT_VsprintfA(str, format.wx_str(), argptr);
 648     else
 649     #endif
 650     #if wxUSE_UNICODE
 651     return PrintfViaString(str, wxNO_LEN, format, argptr);
 652     #else
 653     return wxCRT_VsprintfA(str, format.mb_str(), argptr);
 654     #endif
 655 #endif
 656 }
 657
 658 #if wxUSE_UNICODE
 659 int wxVsprintf(wchar_t *str, const wxString& format, va_list argptr)
 660 {
 661 #if wxUSE_UNICODE_WCHAR
 662 #ifdef __DMC__
 663 /*
 664 This fails with a bug similar to
 665 http://www.digitalmars.com/pnews/read.php?server=news.digitalmars.com&group=c++.beta&artnum=680
 666 in DMC 8.49 and 8.50
 667 I don't see it being used in the wxWidgets sources at present (oct 2007) CE
 668 */
 669 #pragma message ( "warning ::::: wxVsprintf(wchar_t *str, const wxString& format, va_list argptr) not yet implemented" )
 670     wxFAIL_MSG( _T("TODO") );
 671
 672     return -1;
 673 #else
 674     return wxCRT_VsprintfW(str, format.wc_str(), argptr);
 675 #endif //DMC
 676 #else // wxUSE_UNICODE_UTF8
 677     #if !wxUSE_UTF8_LOCALE_ONLY
 678     if ( !wxLocaleIsUtf8 )
 679         return wxCRT_VsprintfW(str, format.wc_str(), argptr);
 680     else
 681     #endif
 682         return PrintfViaString(str, wxNO_LEN, format, argptr);
 683 #endif // wxUSE_UNICODE_UTF8
 684 }
 685 #endif // wxUSE_UNICODE
 686
 687 int wxVsnprintf(char *str, size_t size, const wxString& format, va_list argptr)
 688 {
 689     int rv;
 690 #if wxUSE_UTF8_LOCALE_ONLY
 691     rv = wxCRT_VsnprintfA(str, size, format.wx_str(), argptr);
 692 #else
 693     #if wxUSE_UNICODE_UTF8
 694     if ( wxLocaleIsUtf8 )
 695         rv = wxCRT_VsnprintfA(str, size, format.wx_str(), argptr);
 696     else
 697     #endif
 698     #if wxUSE_UNICODE
 699     {
 700         // NB: if this code is called, then wxString::PrintV() would use the
 701         //     wchar_t* version of wxVsnprintf(), so it's safe to use PrintV()
 702         //     from here
 703         rv = PrintfViaString(str, size, format, argptr);
 704     }
 705     #else
 706     rv = wxCRT_VsnprintfA(str, size, format.mb_str(), argptr);
 707     #endif
 708 #endif
 709
 710     // VsnprintfTestCase reveals that glibc's implementation of vswprintf
 711     // doesn't nul terminate on truncation.
 712     str[size - 1] = 0;
 713
 714     return rv;
 715 }
 716
 717 #if wxUSE_UNICODE
 718 int wxVsnprintf(wchar_t *str, size_t size, const wxString& format, va_list argptr)
 719 {
 720     int rv;
 721
 722 #if wxUSE_UNICODE_WCHAR
 723     rv = wxCRT_VsnprintfW(str, size, format.wc_str(), argptr);
 724 #else // wxUSE_UNICODE_UTF8
 725     #if !wxUSE_UTF8_LOCALE_ONLY
 726     if ( !wxLocaleIsUtf8 )
 727         rv = wxCRT_VsnprintfW(str, size, format.wc_str(), argptr);
 728     else
 729     #endif
 730     {
 731         // NB: if this code is called, then wxString::PrintV() would use the
 732         //     char* version of wxVsnprintf(), so it's safe to use PrintV()
 733         //     from here
 734         rv = PrintfViaString(str, size, format, argptr);
 735     }
 736 #endif // wxUSE_UNICODE_UTF8
 737
 738     // VsnprintfTestCase reveals that glibc's implementation of vswprintf
 739     // doesn't nul terminate on truncation.
 740     str[size - 1] = 0;
 741
 742     return rv;
 743 }
 744 #endif // wxUSE_UNICODE
 745
 746 #if wxUSE_WCHAR_T
 747
 748 // ----------------------------------------------------------------------------
 749 // ctype.h stuff (currently unused)
 750 // ----------------------------------------------------------------------------
 751
 752 #ifdef wxNEED_WX_MBSTOWCS
 753
 754 WXDLLIMPEXP_BASE size_t wxMbstowcs (wchar_t * out, const char * in, size_t outlen)
 755 {
 756     if (!out)
 757     {
 758         size_t outsize = 0;
 759         while(*in++)
 760             outsize++;
 761         return outsize;
 762     }
 763
 764     const char* origin = in;
 765
 766     while (outlen-- && *in)
 767     {
 768         *out++ = (wchar_t) *in++;
 769     }
 770
 771     *out = '\0';
 772
 773     return in - origin;
 774 }
 775
 776 WXDLLIMPEXP_BASE size_t wxWcstombs (char * out, const wchar_t * in, size_t outlen)
 777 {
 778     if (!out)
 779     {
 780         size_t outsize = 0;
 781         while(*in++)
 782             outsize++;
 783         return outsize;
 784     }
 785
 786     const wchar_t* origin = in;
 787
 788     while (outlen-- && *in)
 789     {
 790         *out++ = (char) *in++;
 791     }
 792
 793     *out = '\0';
 794
 795     return in - origin;
 796 }
 797
 798 #endif // wxNEED_WX_MBSTOWCS
 799
 800 #ifndef wxCRT_StrdupA
 801 WXDLLIMPEXP_BASE char *wxCRT_StrdupA(const char *s)
 802 {
 803     return strcpy((char *)malloc(strlen(s) + 1), s);
 804 }
 805 #endif // wxCRT_StrdupA
 806
 807 #ifndef wxCRT_StrdupW
 808 WXDLLIMPEXP_BASE wchar_t * wxCRT_StrdupW(const wchar_t *pwz)
 809 {
 810   size_t size = (wxWcslen(pwz) + 1) * sizeof(wchar_t);
 811   wchar_t *ret = (wchar_t *) malloc(size);
 812   memcpy(ret, pwz, size);
 813   return ret;
 814 }
 815 #endif // wxCRT_StrdupW
 816
 817 #ifndef wxCRT_StricmpA
 818 WXDLLIMPEXP_BASE int wxCRT_StricmpA(const char *psz1, const char *psz2)
 819 {
 820   register char c1, c2;
 821   do {
 822     c1 = wxTolower(*psz1++);
 823     c2 = wxTolower(*psz2++);
 824   } while ( c1 && (c1 == c2) );
 825   return c1 - c2;
 826 }
 827 #endif // !defined(wxCRT_StricmpA)
 828
 829 #ifndef wxCRT_StricmpW
 830 WXDLLIMPEXP_BASE int wxCRT_StricmpW(const wchar_t *psz1, const wchar_t *psz2)
 831 {
 832   register wchar_t c1, c2;
 833   do {
 834     c1 = wxTolower(*psz1++);
 835     c2 = wxTolower(*psz2++);
 836   } while ( c1 && (c1 == c2) );
 837   return c1 - c2;
 838 }
 839 #endif // !defined(wxCRT_StricmpW)
 840
 841 #ifndef wxCRT_StrnicmpA
 842 WXDLLIMPEXP_BASE int wxCRT_StrnicmpA(const char *s1, const char *s2, size_t n)
 843 {
 844   // initialize the variables just to suppress stupid gcc warning
 845   register char c1 = 0, c2 = 0;
 846   while (n && ((c1 = wxTolower(*s1)) == (c2 = wxTolower(*s2)) ) && c1) n--, s1++, s2++;
 847   if (n) {
 848     if (c1 < c2) return -1;
 849     if (c1 > c2) return 1;
 850   }
 851   return 0;
 852 }
 853 #endif // !defined(wxCRT_StrnicmpA)
 854
 855 #ifndef wxCRT_StrnicmpW
 856 WXDLLIMPEXP_BASE int wxCRT_StrnicmpW(const wchar_t *s1, const wchar_t *s2, size_t n)
 857 {
 858   // initialize the variables just to suppress stupid gcc warning
 859   register wchar_t c1 = 0, c2 = 0;
 860   while (n && ((c1 = wxTolower(*s1)) == (c2 = wxTolower(*s2)) ) && c1) n--, s1++, s2++;
 861   if (n) {
 862     if (c1 < c2) return -1;
 863     if (c1 > c2) return 1;
 864   }
 865   return 0;
 866 }
 867 #endif // !defined(wxCRT_StrnicmpW)
 868
 869 // ----------------------------------------------------------------------------
 870 // string.h functions
 871 // ----------------------------------------------------------------------------
 872
 873 // this (and wxCRT_StrncmpW below) are extern "C" because they are needed
 874 // by regex code, the rest isn't needed, so it's not declared as extern "C"
 875 #ifndef wxCRT_StrlenW
 876 extern "C" WXDLLIMPEXP_BASE size_t wxCRT_StrlenW(const wchar_t *s)
 877 {
 878     size_t n = 0;
 879     while ( *s++ )
 880         n++;
 881
 882     return n;
 883 }
 884 #endif
 885
 886 // ----------------------------------------------------------------------------
 887 // stdlib.h functions
 888 // ----------------------------------------------------------------------------
 889
 890 #ifndef wxCRT_GetenvW
 891 WXDLLIMPEXP_BASE wchar_t* wxCRT_GetenvW(const wchar_t *name)
 892 {
 893     // NB: buffer returned by getenv() is allowed to be overwritten next
 894     //     time getenv() is called, so it is OK to use static string
 895     //     buffer to hold the data.
 896     static wxWCharBuffer value((wchar_t*)NULL);
 897     value = wxConvLibc.cMB2WC(getenv(wxConvLibc.cWC2MB(name)));
 898     return value.data();
 899 }
 900 #endif // !wxCRT_GetenvW
 901
 902 #ifndef wxCRT_StrftimeW
 903 WXDLLIMPEXP_BASE size_t
 904 wxCRT_StrftimeW(wchar_t *s, size_t maxsize, const wchar_t *fmt, const struct tm *tm)
 905 {
 906     if ( !maxsize )
 907         return 0;
 908
 909     wxCharBuffer buf(maxsize);
 910
 911     wxCharBuffer bufFmt(wxConvLibc.cWX2MB(fmt));
 912     if ( !bufFmt )
 913         return 0;
 914
 915     size_t ret = strftime(buf.data(), maxsize, bufFmt, tm);
 916     if  ( !ret )
 917         return 0;
 918
 919     wxWCharBuffer wbuf = wxConvLibc.cMB2WX(buf);
 920     if ( !wbuf )
 921         return 0;
 922
 923     wxCRT_StrncpyW(s, wbuf, maxsize);
 924     return wxCRT_StrlenW(s);
 925 }
 926 #endif // !wxCRT_StrftimeW
 927
 928 #endif // wxUSE_WCHAR_T
 929
 930 #ifdef wxLongLong_t
 931 template<typename T>
 932 static wxULongLong_t
 933 wxCRT_StrtoullBase(const T* nptr, T** endptr, int base, T* sign)
 934 {
 935     wxULongLong_t sum = 0;
 936     wxString wxstr(nptr);
 937     wxString::const_iterator i = wxstr.begin();
 938     wxString::const_iterator end = wxstr.end();
 939
 940     // Skip spaces
 941     while ( i != end && wxIsspace(*i) ) ++i;
 942
 943     // Starts with sign?
 944     *sign = wxT(' ');
 945     if ( i != end )
 946     {
 947         T c = *i;
 948         if ( c == wxT('+') || c == wxT('-') )
 949         {
 950             *sign = c;
 951             ++i;
 952         }
 953     }
 954
 955     // Starts with 0x?
 956     if ( i != end && *i == wxT('0') )
 957     {
 958         ++i;
 959         if ( i != end )
 960         {
 961             if ( *i == wxT('x') && (base == 16 || base == 0) )
 962             {
 963                 base = 16;
 964                 ++i;
 965             }
 966             else
 967             {
 968                 if ( endptr )
 969                     *endptr = (T*) nptr;
 970                 wxSET_ERRNO(EINVAL);
 971                 return sum;
 972             }
 973         }
 974         else
 975             --i;
 976     }
 977
 978     if ( base == 0 )
 979         base = 10;
 980
 981     for ( ; i != end; ++i )
 982     {
 983         unsigned int n;
 984
 985         T c = *i;
 986         if ( c >= '0' )
 987         {
 988             if ( c <= '9' )
 989                 n = c - wxT('0');
 990             else
 991                 n = wxTolower(c) - wxT('a') + 10;
 992         }
 993         else
 994             break;
 995
 996         if ( n >= (unsigned int)base )
 997             // Invalid character (for this base)
 998             break;
 999
1000         wxULongLong_t prevsum = sum;
1001         sum = (sum * base) + n;
1002
1003         if ( sum < prevsum )
1004         {
1005             wxSET_ERRNO(ERANGE);
1006             break;
1007         }
1008     }
1009
1010     if ( endptr )
1011     {
1012         *endptr = (T*)(nptr + (i - wxstr.begin()));
1013     }
1014
1015     return sum;
1016 }
1017
1018 template<typename T>
1019 static wxULongLong_t wxCRT_DoStrtoull(const T* nptr, T** endptr, int base)
1020 {
1021     T sign;
1022     wxULongLong_t uval = ::wxCRT_StrtoullBase(nptr, endptr, base, &sign);
1023
1024     if ( sign == wxT('-') )
1025     {
1026         wxSET_ERRNO(ERANGE);
1027         uval = 0;
1028     }
1029
1030     return uval;
1031 }
1032
1033 template<typename T>
1034 static wxLongLong_t wxCRT_DoStrtoll(const T* nptr, T** endptr, int base)
1035 {
1036     T sign;
1037     wxULongLong_t uval = ::wxCRT_StrtoullBase(nptr, endptr, base, &sign);
1038     wxLongLong_t val = 0;
1039
1040     if ( sign == wxT('-') )
1041     {
1042         if (uval <= (wxULongLong_t)wxINT64_MAX + 1)
1043         {
1044             val = -(wxLongLong_t)uval;
1045         }
1046         else
1047         {
1048             wxSET_ERRNO(ERANGE);
1049         }
1050     }
1051     else if ( uval <= wxINT64_MAX )
1052     {
1053         val = uval;
1054     }
1055     else
1056     {
1057         wxSET_ERRNO(ERANGE);
1058     }
1059
1060     return val;
1061 }
1062
1063 #ifndef wxCRT_StrtollA
1064 wxLongLong_t wxCRT_StrtollA(const char* nptr, char** endptr, int base)
1065     { return wxCRT_DoStrtoll(nptr, endptr, base); }
1066 #endif
1067 #ifndef wxCRT_StrtollW
1068 wxLongLong_t wxCRT_StrtollW(const wchar_t* nptr, wchar_t** endptr, int base)
1069     { return wxCRT_DoStrtoll(nptr, endptr, base); }
1070 #endif
1071
1072 #ifndef wxCRT_StrtoullA
1073 wxULongLong_t wxCRT_StrtoullA(const char* nptr, char** endptr, int base)
1074     { return wxCRT_DoStrtoull(nptr, endptr, base); }
1075 #endif
1076 #ifndef wxCRT_StrtoullW
1077 wxULongLong_t wxCRT_StrtoullW(const wchar_t* nptr, wchar_t** endptr, int base)
1078     { return wxCRT_DoStrtoull(nptr, endptr, base); }
1079 #endif
1080
1081 #endif // wxLongLong_t
1082
1083 // ----------------------------------------------------------------------------
1084 // functions which we may need even if !wxUSE_WCHAR_T
1085 // ----------------------------------------------------------------------------
1086
1087 template<typename T>
1088 static T *wxCRT_DoStrtok(T *psz, const T *delim, T **save_ptr)
1089 {
1090     if (!psz)
1091     {
1092         psz = *save_ptr;
1093         if ( !psz )
1094             return NULL;
1095     }
1096
1097     psz += wxStrspn(psz, delim);
1098     if (!*psz)
1099     {
1100         *save_ptr = (T *)NULL;
1101         return (T *)NULL;
1102     }
1103
1104     T *ret = psz;
1105     psz = wxStrpbrk(psz, delim);
1106     if (!psz)
1107     {
1108         *save_ptr = (T*)NULL;
1109     }
1110     else
1111     {
1112         *psz = wxT('\0');
1113         *save_ptr = psz + 1;
1114     }
1115
1116     return ret;
1117 }
1118
1119 #ifndef wxCRT_StrtokA
1120 char *wxCRT_StrtokA(char *psz, const char *delim, char **save_ptr)
1121     { return wxCRT_DoStrtok(psz, delim, save_ptr); }
1122 #endif
1123 #ifndef wxCRT_StrtokW
1124 wchar_t *wxCRT_StrtokW(wchar_t *psz, const wchar_t *delim, wchar_t **save_ptr)
1125     { return wxCRT_DoStrtok(psz, delim, save_ptr); }
1126 #endif
1127
1128 // ----------------------------------------------------------------------------
1129 // missing C RTL functions
1130 // ----------------------------------------------------------------------------
1131
1132 #ifdef wxNEED_STRDUP
1133
1134 char *strdup(const char *s)
1135 {
1136     char *dest = (char*) malloc( strlen( s ) + 1 ) ;
1137     if ( dest )
1138         strcpy( dest , s ) ;
1139     return dest ;
1140 }
1141 #endif // wxNEED_STRDUP
1142
1143 #if defined(__WXWINCE__) && (_WIN32_WCE <= 211)
1144
1145 void *calloc( size_t num, size_t size )
1146 {
1147     void** ptr = (void **)malloc(num * size);
1148     memset( ptr, 0, num * size);
1149     return ptr;
1150 }
1151
1152 #endif // __WXWINCE__ <= 211
1153
1154 // ============================================================================
1155 // wxLocaleIsUtf8
1156 // ============================================================================
1157
1158 #if wxUSE_UNICODE_UTF8
1159
1160 #if !wxUSE_UTF8_LOCALE_ONLY
1161 bool wxLocaleIsUtf8 = false; // the safer setting if not known
1162 #endif
1163
1164 static bool wxIsLocaleUtf8()
1165 {
1166     // NB: we intentionally don't use wxLocale::GetSystemEncodingName(),
1167     //     because a) it may be unavailable in some builds and b) has slightly
1168     //     different semantics (default locale instead of current)
1169
1170 #if defined(HAVE_LANGINFO_H) && defined(CODESET)
1171     // GNU libc provides current character set this way (this conforms to
1172     // Unix98)
1173     const char *charset = nl_langinfo(CODESET);
1174     if ( charset )
1175     {
1176         // "UTF-8" is used by modern glibc versions, but test other variants
1177         // as well, just in case:
1178         if ( strcmp(charset, "UTF-8") == 0 ||
1179              strcmp(charset, "utf-8") == 0 ||
1180              strcmp(charset, "UTF8") == 0 ||
1181              strcmp(charset, "utf8") == 0 )
1182         {
1183             return true;
1184         }
1185     }
1186 #endif // HAVE_LANGINFO_H
1187
1188     // check if we're running under the "C" locale: it is 7bit subset
1189     // of UTF-8, so it can be safely used with the UTF-8 build:
1190     const char *lc_ctype = setlocale(LC_CTYPE, NULL);
1191     if ( lc_ctype &&
1192          (strcmp(lc_ctype, "C") == 0 || strcmp(lc_ctype, "POSIX") == 0) )
1193     {
1194         return true;
1195     }
1196
1197     // we don't know what charset libc is using, so assume the worst
1198     // to be safe:
1199     return false;
1200 }
1201
1202 void wxUpdateLocaleIsUtf8()
1203 {
1204 #if wxUSE_UTF8_LOCALE_ONLY
1205     if ( !wxIsLocaleUtf8() )
1206     {
1207         wxLogFatalError(_T("This program requires UTF-8 locale to run."));
1208     }
1209 #else // !wxUSE_UTF8_LOCALE_ONLY
1210     wxLocaleIsUtf8 = wxIsLocaleUtf8();
1211 #endif
1212 }
1213
1214 #endif // wxUSE_UNICODE_UTF8
1215
1216 // ============================================================================
1217 // wx wrappers for CRT functions
1218 // ============================================================================
1219
1220 #if wxUSE_UNICODE_WCHAR
1221     #define CALL_ANSI_OR_UNICODE(return_kw, callA, callW)  return_kw callW
1222 #elif wxUSE_UNICODE_UTF8 && !wxUSE_UTF8_LOCALE_ONLY
1223     #define CALL_ANSI_OR_UNICODE(return_kw, callA, callW) \
1224             return_kw wxLocaleIsUtf8 ? callA : callW
1225 #else // ANSI or UTF8 only
1226     #define CALL_ANSI_OR_UNICODE(return_kw, callA, callW)  return_kw callA
1227 #endif
1228
1229 int wxPuts(const wxString& s)
1230 {
1231     CALL_ANSI_OR_UNICODE(return,
1232                          wxCRT_PutsA(s.mb_str()),
1233                          wxCRT_PutsW(s.wc_str()));
1234 }
1235
1236 int wxFputs(const wxString& s, FILE *stream)
1237 {
1238     CALL_ANSI_OR_UNICODE(return,
1239                          wxCRT_FputsA(s.mb_str(), stream),
1240                          wxCRT_FputsW(s.wc_str(), stream));
1241 }
1242
1243 int wxFputc(const wxUniChar& c, FILE *stream)
1244 {
1245 #if !wxUSE_UNICODE // FIXME-UTF8: temporary, remove this with ANSI build
1246     return wxCRT_FputcA((char)c, stream);
1247 #else
1248     CALL_ANSI_OR_UNICODE(return,
1249                          wxCRT_FputsA(c.AsUTF8(), stream),
1250                          wxCRT_FputcW((wchar_t)c, stream));
1251 #endif
1252 }
1253
1254 #ifdef wxCRT_PerrorA
1255
1256 void wxPerror(const wxString& s)
1257 {
1258 #ifdef wxCRT_PerrorW
1259     CALL_ANSI_OR_UNICODE(wxEMPTY_PARAMETER_VALUE,
1260                          wxCRT_PerrorA(s.mb_str()),
1261                          wxCRT_PerrorW(s.wc_str()));
1262 #else
1263     wxCRT_PerrorA(s.mb_str());
1264 #endif
1265 }
1266
1267 #endif // wxCRT_PerrorA
1268
1269 wchar_t *wxFgets(wchar_t *s, int size, FILE *stream)
1270 {
1271     wxCHECK_MSG( s, NULL, "empty buffer passed to wxFgets()" );
1272
1273     wxCharBuffer buf(size - 1);
1274     // FIXME: this reads too little data if wxConvLibc uses UTF-8 ('size' wide
1275     //        characters may be encoded by up to 'size'*4 bytes), but what
1276     //        else can we do?
1277     if ( wxFgets(buf.data(), size, stream) == NULL )
1278         return NULL;
1279
1280     if ( wxConvLibc.ToWChar(s, size, buf, wxNO_LEN) == wxCONV_FAILED )
1281         return NULL;
1282
1283     return s;
1284 }
1285
1286 // ----------------------------------------------------------------------------
1287 // wxScanf() and friends
1288 // ----------------------------------------------------------------------------
1289
1290 #ifndef HAVE_NO_VSSCANF // __VISUALC__ and __DMC__ see wx/crt.h
1291 int wxVsscanf(const char *str, const char *format, va_list ap)
1292     { return wxCRT_VsscanfA(str, format, ap); }
1293 int wxVsscanf(const wchar_t *str, const wchar_t *format, va_list ap)
1294     { return wxCRT_VsscanfW(str, format, ap); }
1295 int wxVsscanf(const wxCharBuffer& str, const char *format, va_list ap)
1296     { return wxCRT_VsscanfA(str, format, ap); }
1297 int wxVsscanf(const wxWCharBuffer& str, const wchar_t *format, va_list ap)
1298     { return wxCRT_VsscanfW(str, format, ap); }
1299 int wxVsscanf(const wxString& str, const char *format, va_list ap)
1300     { return wxCRT_VsscanfA(str.mb_str(), format, ap); }
1301 int wxVsscanf(const wxString& str, const wchar_t *format, va_list ap)
1302     { return wxCRT_VsscanfW(str.wc_str(), format, ap); }
1303 int wxVsscanf(const wxCStrData& str, const char *format, va_list ap)
1304     { return wxCRT_VsscanfA(str.AsCharBuf(), format, ap); }
1305 int wxVsscanf(const wxCStrData& str, const wchar_t *format, va_list ap)
1306     { return wxCRT_VsscanfW(str.AsWCharBuf(), format, ap); }
1307 #endif // HAVE_NO_VSSCANF