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 vfwscanf(FILE *stream, const wchar_t *format, va_list argptr)
 285 {
 286     wxFAIL_MSG( _T("TODO") );
 287
 288     return -1;
 289 }
 290
 291 #define vswprintf wxCRT_VsnprintfW
 292
 293 static int vfwprintf(FILE *stream, const wchar_t *format, va_list argptr)
 294 {
 295     wxString s;
 296     int rc = s.PrintfV(format, argptr);
 297
 298     if ( rc != -1 )
 299     {
 300         // we can't do much better without Unicode support in libc...
 301         if ( fprintf(stream, "%s", (const char*)s.mb_str() ) == -1 )
 302             return -1;
 303     }
 304
 305     return rc;
 306 }
 307
 308 static int vwprintf(const wchar_t *format, va_list argptr)
 309 {
 310     return wxCRT_VfprintfW(stdout, format, argptr);
 311 }
 312
 313 #endif // wxNEED_WPRINTF
 314
 315 #ifdef wxNEED_VSWSCANF
 316 static int vswscanf(const wchar_t *ws, const wchar_t *format, va_list argptr)
 317 {
 318     // The best we can do without proper Unicode support in glibc is to
 319     // convert the strings into MB representation and run ANSI version
 320     // of the function. This doesn't work with %c and %s because of difference
 321     // in size of char and wchar_t, though.
 322
 323     wxCHECK_MSG( wxStrstr(format, _T("%s")) == NULL, -1,
 324                  _T("incomplete vswscanf implementation doesn't allow %s") );
 325     wxCHECK_MSG( wxStrstr(format, _T("%c")) == NULL, -1,
 326                  _T("incomplete vswscanf implementation doesn't allow %c") );
 327
 328     return vsscanf(wx_static_cast(const char*, wxConvLibc.cWX2MB(ws)),
 329         wxConvLibc.cWX2MB(format), argptr);
 330 }
 331 #endif
 332
 333 // ----------------------------------------------------------------------------
 334 // wxPrintf(), wxScanf() and relatives
 335 // ----------------------------------------------------------------------------
 336
 337 // FIXME-UTF8: do format conversion using (modified) wxFormatConverter in
 338 //             template wrappers, not here; note that it will needed to
 339 //             translate all forms of string specifiers to %(l)s for wxPrintf(),
 340 //             but it only should do what it did in 2.8 for wxScanf()!
 341
 342 #ifndef wxCRT_PrintfW
 343 int wxCRT_PrintfW( const wchar_t *format, ... )
 344 {
 345     va_list argptr;
 346     va_start(argptr, format);
 347
 348     int ret = vwprintf( format, argptr );
 349
 350     va_end(argptr);
 351
 352     return ret;
 353 }
 354 #endif
 355
 356 #ifndef wxCRT_FprintfW
 357 int wxCRT_FprintfW( FILE *stream, const wchar_t *format, ... )
 358 {
 359     va_list argptr;
 360     va_start( argptr, format );
 361
 362     int ret = vfwprintf( stream, format, argptr );
 363
 364     va_end(argptr);
 365
 366     return ret;
 367 }
 368 #endif
 369
 370 #ifndef wxCRT_VfprintfW
 371 int wxCRT_VfprintfW( FILE *stream, const wchar_t *format, va_list argptr )
 372 {
 373     return vfwprintf( stream, format, argptr );
 374 }
 375 #endif
 376
 377 #ifndef wxCRT_VprintfW
 378 int wxCRT_VprintfW( const wchar_t *format, va_list argptr )
 379 {
 380     return vwprintf( format, argptr );
 381 }
 382 #endif
 383
 384 #ifndef wxCRT_VsprintfW
 385 int wxCRT_VsprintfW( wchar_t *str, const wchar_t *format, va_list argptr )
 386 {
 387     // same as for wxSprintf()
 388     return vswprintf(str, INT_MAX / 4, format, argptr);
 389 }
 390 #endif
 391
 392 #ifndef wxCRT_ScanfW
 393 int wxCRT_ScanfW(const wchar_t *format, ...)
 394 {
 395     va_list argptr;
 396     va_start(argptr, format);
 397
 398 #ifdef __VMS
 399 #if (__DECCXX_VER >= 70100000) && !defined(__STD_CFRONT) && !defined( __NONAMESPACE_STD )
 400    int ret = std::vwscanf(format, argptr);
 401 #else
 402    int ret = vwscanf(format, argptr);
 403 #endif
 404 #else
 405    int ret = vwscanf(format, argptr);
 406 #endif
 407
 408     va_end(argptr);
 409
 410     return ret;
 411 }
 412 #endif
 413
 414 #ifndef wxCRT_SscanfW
 415 int wxCRT_SscanfW(const wchar_t *str, const wchar_t *format, ...)
 416 {
 417     va_list argptr;
 418     va_start(argptr, format);
 419
 420 #ifdef __VMS
 421 #if (__DECCXX_VER >= 70100000) && !defined(__STD_CFRONT) && !defined( __NONAMESPACE_STD )
 422    int ret = std::vswscanf(str, format, argptr);
 423 #else
 424    int ret = vswscanf(str, format, argptr);
 425 #endif
 426 #else
 427    int ret = vswscanf(str, format, argptr);
 428 #endif
 429
 430     va_end(argptr);
 431
 432     return ret;
 433 }
 434 #endif
 435
 436 #ifndef wxCRT_FscanfW
 437 int wxCRT_FscanfW(FILE *stream, const wchar_t *format, ...)
 438 {
 439     va_list argptr;
 440     va_start(argptr, format);
 441 #ifdef __VMS
 442 #if (__DECCXX_VER >= 70100000) && !defined(__STD_CFRONT) && !defined( __NONAMESPACE_STD )
 443    int ret = std::vfwscanf(stream, format, argptr);
 444 #else
 445    int ret = vfwscanf(stream, format, argptr);
 446 #endif
 447 #else
 448    int ret = vfwscanf(stream, format, argptr);
 449 #endif
 450
 451     va_end(argptr);
 452
 453     return ret;
 454 }
 455 #endif
 456
 457 #ifndef wxCRT_VsscanfW
 458 int wxCRT_VsscanfW(const wchar_t *str, const wchar_t *format, va_list argptr)
 459 {
 460 #ifdef __VMS
 461 #if (__DECCXX_VER >= 70100000) && !defined(__STD_CFRONT) && !defined( __NONAMESPACE_STD )
 462    return std::vswscanf(str, format, argptr);
 463 #else
 464    return vswscanf(str, format, argptr);
 465 #endif
 466 #else
 467    return vswscanf(str, format, argptr);
 468 #endif
 469 }
 470 #endif
 471
 472
 473 // ----------------------------------------------------------------------------
 474 // wrappers to printf and scanf function families
 475 // ----------------------------------------------------------------------------
 476
 477 #if !wxUSE_UTF8_LOCALE_ONLY
 478 int wxDoSprintfWchar(char *str, const wxChar *format, ...)
 479 {
 480     va_list argptr;
 481     va_start(argptr, format);
 482
 483     int rv = wxVsprintf(str, format, argptr);
 484
 485     va_end(argptr);
 486     return rv;
 487 }
 488 #endif // !wxUSE_UTF8_LOCALE_ONLY
 489
 490 #if wxUSE_UNICODE_UTF8
 491 int wxDoSprintfUtf8(char *str, const char *format, ...)
 492 {
 493     va_list argptr;
 494     va_start(argptr, format);
 495
 496     int rv = wxVsprintf(str, format, argptr);
 497
 498     va_end(argptr);
 499     return rv;
 500 }
 501 #endif // wxUSE_UNICODE_UTF8
 502
 503 #if wxUSE_UNICODE
 504
 505 #if !wxUSE_UTF8_LOCALE_ONLY
 506 int wxDoSprintfWchar(wchar_t *str, const wxChar *format, ...)
 507 {
 508     va_list argptr;
 509     va_start(argptr, format);
 510
 511     int rv = wxVsprintf(str, format, argptr);
 512
 513     va_end(argptr);
 514     return rv;
 515 }
 516 #endif // !wxUSE_UTF8_LOCALE_ONLY
 517
 518 #if wxUSE_UNICODE_UTF8
 519 int wxDoSprintfUtf8(wchar_t *str, const char *format, ...)
 520 {
 521     va_list argptr;
 522     va_start(argptr, format);
 523
 524     int rv = wxVsprintf(str, format, argptr);
 525
 526     va_end(argptr);
 527     return rv;
 528 }
 529 #endif // wxUSE_UNICODE_UTF8
 530
 531 #endif // wxUSE_UNICODE
 532
 533 #if !wxUSE_UTF8_LOCALE_ONLY
 534 int wxDoSnprintfWchar(char *str, size_t size, const wxChar *format, ...)
 535 {
 536     va_list argptr;
 537     va_start(argptr, format);
 538
 539     int rv = wxVsnprintf(str, size, format, argptr);
 540
 541     va_end(argptr);
 542     return rv;
 543 }
 544 #endif // !wxUSE_UTF8_LOCALE_ONLY
 545
 546 #if wxUSE_UNICODE_UTF8
 547 int wxDoSnprintfUtf8(char *str, size_t size, const char *format, ...)
 548 {
 549     va_list argptr;
 550     va_start(argptr, format);
 551
 552     int rv = wxVsnprintf(str, size, format, argptr);
 553
 554     va_end(argptr);
 555     return rv;
 556 }
 557 #endif // wxUSE_UNICODE_UTF8
 558
 559 #if wxUSE_UNICODE
 560
 561 #if !wxUSE_UTF8_LOCALE_ONLY
 562 int wxDoSnprintfWchar(wchar_t *str, size_t size, const wxChar *format, ...)
 563 {
 564     va_list argptr;
 565     va_start(argptr, format);
 566
 567     int rv = wxVsnprintf(str, size, format, argptr);
 568
 569     va_end(argptr);
 570     return rv;
 571 }
 572 #endif // !wxUSE_UTF8_LOCALE_ONLY
 573
 574 #if wxUSE_UNICODE_UTF8
 575 int wxDoSnprintfUtf8(wchar_t *str, size_t size, const char *format, ...)
 576 {
 577     va_list argptr;
 578     va_start(argptr, format);
 579
 580     int rv = wxVsnprintf(str, size, format, argptr);
 581
 582     va_end(argptr);
 583     return rv;
 584 }
 585 #endif // wxUSE_UNICODE_UTF8
 586
 587 #endif // wxUSE_UNICODE
 588
 589
 590 #ifdef HAVE_BROKEN_VSNPRINTF_DECL
 591     #define vsnprintf wx_fixed_vsnprintf
 592 #endif
 593
 594 #if wxUSE_UNICODE
 595
 596 namespace
 597 {
 598
 599 #if !wxUSE_UTF8_LOCALE_ONLY
 600 int ConvertStringToBuf(const wxString& s, char *out, size_t outsize)
 601 {
 602     const wxWX2WCbuf buf = s.wc_str();
 603
 604     size_t len = wxConvLibc.FromWChar(out, outsize, buf);
 605     if ( len != wxCONV_FAILED )
 606         return len-1;
 607     else
 608         return wxConvLibc.FromWChar(NULL, 0, buf);
 609 }
 610 #endif // !wxUSE_UTF8_LOCALE_ONLY
 611
 612 #if wxUSE_UNICODE_UTF8
 613 int ConvertStringToBuf(const wxString& s, wchar_t *out, size_t outsize)
 614 {
 615     const wxWX2WCbuf buf(s.wc_str());
 616     size_t len = s.length(); // same as buf length for wchar_t*
 617     if ( outsize > len )
 618     {
 619         memcpy(out, buf, (len+1) * sizeof(wchar_t));
 620     }
 621     else // not enough space
 622     {
 623         memcpy(out, buf, (outsize-1) * sizeof(wchar_t));
 624         out[outsize-1] = 0;
 625     }
 626     return len;
 627 }
 628 #endif // wxUSE_UNICODE_UTF8
 629
 630 } // anonymous namespace
 631
 632 template<typename T>
 633 static size_t PrintfViaString(T *out, size_t outsize,
 634                               const wxString& format, va_list argptr)
 635 {
 636     wxString s;
 637     s.PrintfV(format, argptr);
 638
 639     return ConvertStringToBuf(s, out, outsize);
 640 }
 641 #endif // wxUSE_UNICODE
 642
 643 int wxVsprintf(char *str, const wxString& format, va_list argptr)
 644 {
 645 #if wxUSE_UTF8_LOCALE_ONLY
 646     return wxCRT_VsprintfA(str, format.wx_str(), argptr);
 647 #else
 648     #if wxUSE_UNICODE_UTF8
 649     if ( wxLocaleIsUtf8 )
 650         return wxCRT_VsprintfA(str, format.wx_str(), argptr);
 651     else
 652     #endif
 653     #if wxUSE_UNICODE
 654     return PrintfViaString(str, wxNO_LEN, format, argptr);
 655     #else
 656     return wxCRT_VsprintfA(str, format.mb_str(), argptr);
 657     #endif
 658 #endif
 659 }
 660
 661 #if wxUSE_UNICODE
 662 int wxVsprintf(wchar_t *str, const wxString& format, va_list argptr)
 663 {
 664 #if wxUSE_UNICODE_WCHAR
 665 #ifdef __DMC__
 666 /*
 667 This fails with a bug similar to
 668 http://www.digitalmars.com/pnews/read.php?server=news.digitalmars.com&group=c++.beta&artnum=680
 669 in DMC 8.49 and 8.50
 670 I don't see it being used in the wxWidgets sources at present (oct 2007) CE
 671 */
 672 #pragma message ( "warning ::::: wxVsprintf(wchar_t *str, const wxString& format, va_list argptr) not yet implemented" )
 673     wxFAIL_MSG( _T("TODO") );
 674
 675     return -1;
 676 #else
 677     return wxCRT_VsprintfW(str, format.wc_str(), argptr);
 678 #endif //DMC
 679 #else // wxUSE_UNICODE_UTF8
 680     #if !wxUSE_UTF8_LOCALE_ONLY
 681     if ( !wxLocaleIsUtf8 )
 682         return wxCRT_VsprintfW(str, format.wc_str(), argptr);
 683     else
 684     #endif
 685         return PrintfViaString(str, wxNO_LEN, format, argptr);
 686 #endif // wxUSE_UNICODE_UTF8
 687 }
 688 #endif // wxUSE_UNICODE
 689
 690 int wxVsnprintf(char *str, size_t size, const wxString& format, va_list argptr)
 691 {
 692     int rv;
 693 #if wxUSE_UTF8_LOCALE_ONLY
 694     rv = wxCRT_VsnprintfA(str, size, format.wx_str(), argptr);
 695 #else
 696     #if wxUSE_UNICODE_UTF8
 697     if ( wxLocaleIsUtf8 )
 698         rv = wxCRT_VsnprintfA(str, size, format.wx_str(), argptr);
 699     else
 700     #endif
 701     #if wxUSE_UNICODE
 702     {
 703         // NB: if this code is called, then wxString::PrintV() would use the
 704         //     wchar_t* version of wxVsnprintf(), so it's safe to use PrintV()
 705         //     from here
 706         rv = PrintfViaString(str, size, format, argptr);
 707     }
 708     #else
 709     rv = wxCRT_VsnprintfA(str, size, format.mb_str(), argptr);
 710     #endif
 711 #endif
 712
 713     // VsnprintfTestCase reveals that glibc's implementation of vswprintf
 714     // doesn't nul terminate on truncation.
 715     str[size - 1] = 0;
 716
 717     return rv;
 718 }
 719
 720 #if wxUSE_UNICODE
 721 int wxVsnprintf(wchar_t *str, size_t size, const wxString& format, va_list argptr)
 722 {
 723     int rv;
 724
 725 #if wxUSE_UNICODE_WCHAR
 726     rv = wxCRT_VsnprintfW(str, size, format.wc_str(), argptr);
 727 #else // wxUSE_UNICODE_UTF8
 728     #if !wxUSE_UTF8_LOCALE_ONLY
 729     if ( !wxLocaleIsUtf8 )
 730         rv = wxCRT_VsnprintfW(str, size, format.wc_str(), argptr);
 731     else
 732     #endif
 733     {
 734         // NB: if this code is called, then wxString::PrintV() would use the
 735         //     char* version of wxVsnprintf(), so it's safe to use PrintV()
 736         //     from here
 737         rv = PrintfViaString(str, size, format, argptr);
 738     }
 739 #endif // wxUSE_UNICODE_UTF8
 740
 741     // VsnprintfTestCase reveals that glibc's implementation of vswprintf
 742     // doesn't nul terminate on truncation.
 743     str[size - 1] = 0;
 744
 745     return rv;
 746 }
 747 #endif // wxUSE_UNICODE
 748
 749 #if wxUSE_WCHAR_T
 750
 751 // ----------------------------------------------------------------------------
 752 // ctype.h stuff (currently unused)
 753 // ----------------------------------------------------------------------------
 754
 755 #ifdef wxNEED_WX_MBSTOWCS
 756
 757 WXDLLIMPEXP_BASE size_t wxMbstowcs (wchar_t * out, const char * in, size_t outlen)
 758 {
 759     if (!out)
 760     {
 761         size_t outsize = 0;
 762         while(*in++)
 763             outsize++;
 764         return outsize;
 765     }
 766
 767     const char* origin = in;
 768
 769     while (outlen-- && *in)
 770     {
 771         *out++ = (wchar_t) *in++;
 772     }
 773
 774     *out = '\0';
 775
 776     return in - origin;
 777 }
 778
 779 WXDLLIMPEXP_BASE size_t wxWcstombs (char * out, const wchar_t * in, size_t outlen)
 780 {
 781     if (!out)
 782     {
 783         size_t outsize = 0;
 784         while(*in++)
 785             outsize++;
 786         return outsize;
 787     }
 788
 789     const wchar_t* origin = in;
 790
 791     while (outlen-- && *in)
 792     {
 793         *out++ = (char) *in++;
 794     }
 795
 796     *out = '\0';
 797
 798     return in - origin;
 799 }
 800
 801 #endif // wxNEED_WX_MBSTOWCS
 802
 803 #ifndef wxCRT_StrdupA
 804 WXDLLIMPEXP_BASE char *wxCRT_StrdupA(const char *s)
 805 {
 806     return strcpy((char *)malloc(strlen(s) + 1), s);
 807 }
 808 #endif // wxCRT_StrdupA
 809
 810 #ifndef wxCRT_StrdupW
 811 WXDLLIMPEXP_BASE wchar_t * wxCRT_StrdupW(const wchar_t *pwz)
 812 {
 813   size_t size = (wxWcslen(pwz) + 1) * sizeof(wchar_t);
 814   wchar_t *ret = (wchar_t *) malloc(size);
 815   memcpy(ret, pwz, size);
 816   return ret;
 817 }
 818 #endif // wxCRT_StrdupW
 819
 820 #ifndef wxCRT_StricmpA
 821 WXDLLIMPEXP_BASE int wxCRT_StricmpA(const char *psz1, const char *psz2)
 822 {
 823   register char c1, c2;
 824   do {
 825     c1 = wxTolower(*psz1++);
 826     c2 = wxTolower(*psz2++);
 827   } while ( c1 && (c1 == c2) );
 828   return c1 - c2;
 829 }
 830 #endif // !defined(wxCRT_StricmpA)
 831
 832 #ifndef wxCRT_StricmpW
 833 WXDLLIMPEXP_BASE int wxCRT_StricmpW(const wchar_t *psz1, const wchar_t *psz2)
 834 {
 835   register wchar_t c1, c2;
 836   do {
 837     c1 = wxTolower(*psz1++);
 838     c2 = wxTolower(*psz2++);
 839   } while ( c1 && (c1 == c2) );
 840   return c1 - c2;
 841 }
 842 #endif // !defined(wxCRT_StricmpW)
 843
 844 #ifndef wxCRT_StrnicmpA
 845 WXDLLIMPEXP_BASE int wxCRT_StrnicmpA(const char *s1, const char *s2, size_t n)
 846 {
 847   // initialize the variables just to suppress stupid gcc warning
 848   register char c1 = 0, c2 = 0;
 849   while (n && ((c1 = wxTolower(*s1)) == (c2 = wxTolower(*s2)) ) && c1) n--, s1++, s2++;
 850   if (n) {
 851     if (c1 < c2) return -1;
 852     if (c1 > c2) return 1;
 853   }
 854   return 0;
 855 }
 856 #endif // !defined(wxCRT_StrnicmpA)
 857
 858 #ifndef wxCRT_StrnicmpW
 859 WXDLLIMPEXP_BASE int wxCRT_StrnicmpW(const wchar_t *s1, const wchar_t *s2, size_t n)
 860 {
 861   // initialize the variables just to suppress stupid gcc warning
 862   register wchar_t c1 = 0, c2 = 0;
 863   while (n && ((c1 = wxTolower(*s1)) == (c2 = wxTolower(*s2)) ) && c1) n--, s1++, s2++;
 864   if (n) {
 865     if (c1 < c2) return -1;
 866     if (c1 > c2) return 1;
 867   }
 868   return 0;
 869 }
 870 #endif // !defined(wxCRT_StrnicmpW)
 871
 872 // ----------------------------------------------------------------------------
 873 // string.h functions
 874 // ----------------------------------------------------------------------------
 875
 876 // this (and wxCRT_StrncmpW below) are extern "C" because they are needed
 877 // by regex code, the rest isn't needed, so it's not declared as extern "C"
 878 #ifndef wxCRT_StrlenW
 879 extern "C" WXDLLIMPEXP_BASE size_t wxCRT_StrlenW(const wchar_t *s)
 880 {
 881     size_t n = 0;
 882     while ( *s++ )
 883         n++;
 884
 885     return n;
 886 }
 887 #endif
 888
 889 // ----------------------------------------------------------------------------
 890 // stdlib.h functions
 891 // ----------------------------------------------------------------------------
 892
 893 #ifndef wxCRT_GetenvW
 894 WXDLLIMPEXP_BASE wchar_t* wxCRT_GetenvW(const wchar_t *name)
 895 {
 896     // NB: buffer returned by getenv() is allowed to be overwritten next
 897     //     time getenv() is called, so it is OK to use static string
 898     //     buffer to hold the data.
 899     static wxWCharBuffer value((wchar_t*)NULL);
 900     value = wxConvLibc.cMB2WC(getenv(wxConvLibc.cWC2MB(name)));
 901     return value.data();
 902 }
 903 #endif // !wxCRT_GetenvW
 904
 905 #ifndef wxCRT_StrftimeW
 906 WXDLLIMPEXP_BASE size_t
 907 wxCRT_StrftimeW(wchar_t *s, size_t maxsize, const wchar_t *fmt, const struct tm *tm)
 908 {
 909     if ( !maxsize )
 910         return 0;
 911
 912     wxCharBuffer buf(maxsize);
 913
 914     wxCharBuffer bufFmt(wxConvLibc.cWX2MB(fmt));
 915     if ( !bufFmt )
 916         return 0;
 917
 918     size_t ret = strftime(buf.data(), maxsize, bufFmt, tm);
 919     if  ( !ret )
 920         return 0;
 921
 922     wxWCharBuffer wbuf = wxConvLibc.cMB2WX(buf);
 923     if ( !wbuf )
 924         return 0;
 925
 926     wxCRT_StrncpyW(s, wbuf, maxsize);
 927     return wxCRT_StrlenW(s);
 928 }
 929 #endif // !wxCRT_StrftimeW
 930
 931 #endif // wxUSE_WCHAR_T
 932
 933 #ifdef wxLongLong_t
 934 template<typename T>
 935 static wxULongLong_t
 936 wxCRT_StrtoullBase(const T* nptr, T** endptr, int base, T* sign)
 937 {
 938     wxULongLong_t sum = 0;
 939     wxString wxstr(nptr);
 940     wxString::const_iterator i = wxstr.begin();
 941     wxString::const_iterator end = wxstr.end();
 942
 943     // Skip spaces
 944     while ( i != end && wxIsspace(*i) ) ++i;
 945
 946     // Starts with sign?
 947     *sign = wxT(' ');
 948     if ( i != end )
 949     {
 950         T c = *i;
 951         if ( c == wxT('+') || c == wxT('-') )
 952         {
 953             *sign = c;
 954             ++i;
 955         }
 956     }
 957
 958     // Starts with 0x?
 959     if ( i != end && *i == wxT('0') )
 960     {
 961         ++i;
 962         if ( i != end )
 963         {
 964             if ( *i == wxT('x') && (base == 16 || base == 0) )
 965             {
 966                 base = 16;
 967                 ++i;
 968             }
 969             else
 970             {
 971                 if ( endptr )
 972                     *endptr = (T*) nptr;
 973                 wxSET_ERRNO(EINVAL);
 974                 return sum;
 975             }
 976         }
 977         else
 978             --i;
 979     }
 980
 981     if ( base == 0 )
 982         base = 10;
 983
 984     for ( ; i != end; ++i )
 985     {
 986         unsigned int n;
 987
 988         T c = *i;
 989         if ( c >= '0' )
 990         {
 991             if ( c <= '9' )
 992                 n = c - wxT('0');
 993             else
 994                 n = wxTolower(c) - wxT('a') + 10;
 995         }
 996         else
 997             break;
 998
 999         if ( n >= (unsigned int)base )
1000             // Invalid character (for this base)
1001             break;
1002
1003         wxULongLong_t prevsum = sum;
1004         sum = (sum * base) + n;
1005
1006         if ( sum < prevsum )
1007         {
1008             wxSET_ERRNO(ERANGE);
1009             break;
1010         }
1011     }
1012
1013     if ( endptr )
1014     {
1015         *endptr = (T*)(nptr + (i - wxstr.begin()));
1016     }
1017
1018     return sum;
1019 }
1020
1021 template<typename T>
1022 static wxULongLong_t wxCRT_DoStrtoull(const T* nptr, T** endptr, int base)
1023 {
1024     T sign;
1025     wxULongLong_t uval = ::wxCRT_StrtoullBase(nptr, endptr, base, &sign);
1026
1027     if ( sign == wxT('-') )
1028     {
1029         wxSET_ERRNO(ERANGE);
1030         uval = 0;
1031     }
1032
1033     return uval;
1034 }
1035
1036 template<typename T>
1037 static wxLongLong_t wxCRT_DoStrtoll(const T* nptr, T** endptr, int base)
1038 {
1039     T sign;
1040     wxULongLong_t uval = ::wxCRT_StrtoullBase(nptr, endptr, base, &sign);
1041     wxLongLong_t val = 0;
1042
1043     if ( sign == wxT('-') )
1044     {
1045         if (uval <= (wxULongLong_t)wxINT64_MAX + 1)
1046         {
1047             val = -(wxLongLong_t)uval;
1048         }
1049         else
1050         {
1051             wxSET_ERRNO(ERANGE);
1052         }
1053     }
1054     else if ( uval <= wxINT64_MAX )
1055     {
1056         val = uval;
1057     }
1058     else
1059     {
1060         wxSET_ERRNO(ERANGE);
1061     }
1062
1063     return val;
1064 }
1065
1066 #ifndef wxCRT_StrtollA
1067 wxLongLong_t wxCRT_StrtollA(const char* nptr, char** endptr, int base)
1068     { return wxCRT_DoStrtoll(nptr, endptr, base); }
1069 #endif
1070 #ifndef wxCRT_StrtollW
1071 wxLongLong_t wxCRT_StrtollW(const wchar_t* nptr, wchar_t** endptr, int base)
1072     { return wxCRT_DoStrtoll(nptr, endptr, base); }
1073 #endif
1074
1075 #ifndef wxCRT_StrtoullA
1076 wxULongLong_t wxCRT_StrtoullA(const char* nptr, char** endptr, int base)
1077     { return wxCRT_DoStrtoull(nptr, endptr, base); }
1078 #endif
1079 #ifndef wxCRT_StrtoullW
1080 wxULongLong_t wxCRT_StrtoullW(const wchar_t* nptr, wchar_t** endptr, int base)
1081     { return wxCRT_DoStrtoull(nptr, endptr, base); }
1082 #endif
1083
1084 #endif // wxLongLong_t
1085
1086 // ----------------------------------------------------------------------------
1087 // functions which we may need even if !wxUSE_WCHAR_T
1088 // ----------------------------------------------------------------------------
1089
1090 template<typename T>
1091 static T *wxCRT_DoStrtok(T *psz, const T *delim, T **save_ptr)
1092 {
1093     if (!psz)
1094     {
1095         psz = *save_ptr;
1096         if ( !psz )
1097             return NULL;
1098     }
1099
1100     psz += wxStrspn(psz, delim);
1101     if (!*psz)
1102     {
1103         *save_ptr = (T *)NULL;
1104         return (T *)NULL;
1105     }
1106
1107     T *ret = psz;
1108     psz = wxStrpbrk(psz, delim);
1109     if (!psz)
1110     {
1111         *save_ptr = (T*)NULL;
1112     }
1113     else
1114     {
1115         *psz = wxT('\0');
1116         *save_ptr = psz + 1;
1117     }
1118
1119     return ret;
1120 }
1121
1122 #ifndef wxCRT_StrtokA
1123 char *wxCRT_StrtokA(char *psz, const char *delim, char **save_ptr)
1124     { return wxCRT_DoStrtok(psz, delim, save_ptr); }
1125 #endif
1126 #ifndef wxCRT_StrtokW
1127 wchar_t *wxCRT_StrtokW(wchar_t *psz, const wchar_t *delim, wchar_t **save_ptr)
1128     { return wxCRT_DoStrtok(psz, delim, save_ptr); }
1129 #endif
1130
1131 // ----------------------------------------------------------------------------
1132 // missing C RTL functions
1133 // ----------------------------------------------------------------------------
1134
1135 #ifdef wxNEED_STRDUP
1136
1137 char *strdup(const char *s)
1138 {
1139     char *dest = (char*) malloc( strlen( s ) + 1 ) ;
1140     if ( dest )
1141         strcpy( dest , s ) ;
1142     return dest ;
1143 }
1144 #endif // wxNEED_STRDUP
1145
1146 #if defined(__WXWINCE__) && (_WIN32_WCE <= 211)
1147
1148 void *calloc( size_t num, size_t size )
1149 {
1150     void** ptr = (void **)malloc(num * size);
1151     memset( ptr, 0, num * size);
1152     return ptr;
1153 }
1154
1155 #endif // __WXWINCE__ <= 211
1156
1157 // ============================================================================
1158 // wxLocaleIsUtf8
1159 // ============================================================================
1160
1161 #if wxUSE_UNICODE_UTF8
1162
1163 #if !wxUSE_UTF8_LOCALE_ONLY
1164 bool wxLocaleIsUtf8 = false; // the safer setting if not known
1165 #endif
1166
1167 static bool wxIsLocaleUtf8()
1168 {
1169     // NB: we intentionally don't use wxLocale::GetSystemEncodingName(),
1170     //     because a) it may be unavailable in some builds and b) has slightly
1171     //     different semantics (default locale instead of current)
1172
1173 #if defined(HAVE_LANGINFO_H) && defined(CODESET)
1174     // GNU libc provides current character set this way (this conforms to
1175     // Unix98)
1176     const char *charset = nl_langinfo(CODESET);
1177     if ( charset )
1178     {
1179         // "UTF-8" is used by modern glibc versions, but test other variants
1180         // as well, just in case:
1181         if ( strcmp(charset, "UTF-8") == 0 ||
1182              strcmp(charset, "utf-8") == 0 ||
1183              strcmp(charset, "UTF8") == 0 ||
1184              strcmp(charset, "utf8") == 0 )
1185         {
1186             return true;
1187         }
1188     }
1189 #endif // HAVE_LANGINFO_H
1190
1191     // check if we're running under the "C" locale: it is 7bit subset
1192     // of UTF-8, so it can be safely used with the UTF-8 build:
1193     const char *lc_ctype = setlocale(LC_CTYPE, NULL);
1194     if ( lc_ctype &&
1195          (strcmp(lc_ctype, "C") == 0 || strcmp(lc_ctype, "POSIX") == 0) )
1196     {
1197         return true;
1198     }
1199
1200     // we don't know what charset libc is using, so assume the worst
1201     // to be safe:
1202     return false;
1203 }
1204
1205 void wxUpdateLocaleIsUtf8()
1206 {
1207 #if wxUSE_UTF8_LOCALE_ONLY
1208     if ( !wxIsLocaleUtf8() )
1209     {
1210         wxLogFatalError(_T("This program requires UTF-8 locale to run."));
1211     }
1212 #else // !wxUSE_UTF8_LOCALE_ONLY
1213     wxLocaleIsUtf8 = wxIsLocaleUtf8();
1214 #endif
1215 }
1216
1217 #endif // wxUSE_UNICODE_UTF8
1218
1219 // ============================================================================
1220 // wx wrappers for CRT functions
1221 // ============================================================================
1222
1223 #if wxUSE_UNICODE_WCHAR
1224     #define CALL_ANSI_OR_UNICODE(return_kw, callA, callW)  return_kw callW
1225 #elif wxUSE_UNICODE_UTF8 && !wxUSE_UTF8_LOCALE_ONLY
1226     #define CALL_ANSI_OR_UNICODE(return_kw, callA, callW) \
1227             return_kw wxLocaleIsUtf8 ? callA : callW
1228 #else // ANSI or UTF8 only
1229     #define CALL_ANSI_OR_UNICODE(return_kw, callA, callW)  return_kw callA
1230 #endif
1231
1232 int wxPuts(const wxString& s)
1233 {
1234     CALL_ANSI_OR_UNICODE(return,
1235                          wxCRT_PutsA(s.mb_str()),
1236                          wxCRT_PutsW(s.wc_str()));
1237 }
1238
1239 int wxFputs(const wxString& s, FILE *stream)
1240 {
1241     CALL_ANSI_OR_UNICODE(return,
1242                          wxCRT_FputsA(s.mb_str(), stream),
1243                          wxCRT_FputsW(s.wc_str(), stream));
1244 }
1245
1246 int wxFputc(const wxUniChar& c, FILE *stream)
1247 {
1248 #if !wxUSE_UNICODE // FIXME-UTF8: temporary, remove this with ANSI build
1249     return wxCRT_FputcA((char)c, stream);
1250 #else
1251     CALL_ANSI_OR_UNICODE(return,
1252                          wxCRT_FputsA(c.AsUTF8(), stream),
1253                          wxCRT_FputcW((wchar_t)c, stream));
1254 #endif
1255 }
1256
1257 #ifdef wxCRT_PerrorA
1258
1259 void wxPerror(const wxString& s)
1260 {
1261 #ifdef wxCRT_PerrorW
1262     CALL_ANSI_OR_UNICODE(wxEMPTY_PARAMETER_VALUE,
1263                          wxCRT_PerrorA(s.mb_str()),
1264                          wxCRT_PerrorW(s.wc_str()));
1265 #else
1266     wxCRT_PerrorA(s.mb_str());
1267 #endif
1268 }
1269
1270 #endif // wxCRT_PerrorA
1271
1272 wchar_t *wxFgets(wchar_t *s, int size, FILE *stream)
1273 {
1274     wxCHECK_MSG( s, NULL, "empty buffer passed to wxFgets()" );
1275
1276     wxCharBuffer buf(size - 1);
1277     // FIXME: this reads too little data if wxConvLibc uses UTF-8 ('size' wide
1278     //        characters may be encoded by up to 'size'*4 bytes), but what
1279     //        else can we do?
1280     if ( wxFgets(buf.data(), size, stream) == NULL )
1281         return NULL;
1282
1283     if ( wxConvLibc.ToWChar(s, size, buf, wxNO_LEN) == wxCONV_FAILED )
1284         return NULL;
1285
1286     return s;
1287 }
1288
1289 // ----------------------------------------------------------------------------
1290 // wxScanf() and friends
1291 // ----------------------------------------------------------------------------
1292
1293 #ifndef HAVE_NO_VSSCANF // __VISUALC__ and __DMC__ see wx/crt.h
1294 int wxVsscanf(const char *str, const char *format, va_list ap)
1295     { return wxCRT_VsscanfA(str, format, ap); }
1296 int wxVsscanf(const wchar_t *str, const wchar_t *format, va_list ap)
1297     { return wxCRT_VsscanfW(str, format, ap); }
1298 int wxVsscanf(const wxCharBuffer& str, const char *format, va_list ap)
1299     { return wxCRT_VsscanfA(wx_static_cast(const char*, str), format, ap); }
1300 int wxVsscanf(const wxWCharBuffer& str, const wchar_t *format, va_list ap)
1301     { return wxCRT_VsscanfW(str, format, ap); }
1302 int wxVsscanf(const wxString& str, const char *format, va_list ap)
1303     { return wxCRT_VsscanfA(wx_static_cast(const char*, str.mb_str()), format, ap); }
1304 int wxVsscanf(const wxString& str, const wchar_t *format, va_list ap)
1305     { return wxCRT_VsscanfW(str.wc_str(), format, ap); }
1306 int wxVsscanf(const wxCStrData& str, const char *format, va_list ap)
1307     { return wxCRT_VsscanfA(wx_static_cast(const char*, str.AsCharBuf()), format, ap); }
1308 int wxVsscanf(const wxCStrData& str, const wchar_t *format, va_list ap)
1309     { return wxCRT_VsscanfW(str.AsWCharBuf(), format, ap); }
1310 #endif // HAVE_NO_VSSCANF