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