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