src/common/wxchar.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wxchar.cpp
   3 // Purpose:     wxChar implementation
   4 // Author:      Ove Kåven
   5 // Modified by:
   6 // Created:     09/04/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWindows copyright
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13   #pragma implementation "wxchar.h"
  14 #endif
  15
  16 // ===========================================================================
  17 // headers, declarations, constants
  18 // ===========================================================================
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24   #pragma hdrstop
  25 #endif
  26
  27 #define _ISOC9X_SOURCE 1 // to get vsscanf()
  28 #define _BSD_SOURCE    1 // to still get strdup()
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <locale.h>
  34 #include <time.h>
  35
  36 #ifndef WX_PRECOMP
  37   #include "wx/defs.h"
  38   #include "wx/wxchar.h"
  39   #include "wx/string.h"
  40   #include "wx/hash.h"
  41 #endif
  42
  43 #include "wx/msgdlg.h"
  44
  45 #if defined(__WIN32__) && defined(wxNEED_WX_CTYPE_H)
  46   #include <windef.h>
  47   #include <winbase.h>
  48   #include <winnls.h>
  49   #include <winnt.h>
  50 #endif
  51
  52 #if wxUSE_WCHAR_T
  53 size_t WXDLLEXPORT wxMB2WC(wchar_t *buf, const char *psz, size_t n)
  54 {
  55   if (buf) {
  56     if (!n || !*psz) {
  57       if (n) *buf = wxT('\0');
  58       return 0;
  59     }
  60     return mbstowcs(buf, psz, n);
  61   }
  62
  63   // assume that we have mbsrtowcs() too if we have wcsrtombs()
  64 #ifdef HAVE_WCSRTOMBS
  65   mbstate_t mbstate;
  66   return mbsrtowcs((wchar_t *) NULL, &psz, 0, &mbstate);
  67 #else  // !GNU libc
  68   return mbstowcs((wchar_t *) NULL, psz, 0);
  69 #endif // GNU
  70 }
  71
  72 size_t WXDLLEXPORT wxWC2MB(char *buf, const wchar_t *pwz, size_t n)
  73 {
  74   if (buf) {
  75     if (!n || !*pwz) {
  76       // glibc2.1 chokes on null input
  77       if (n) *buf = '\0';
  78       return 0;
  79     }
  80     return wcstombs(buf, pwz, n);
  81   }
  82
  83 #if HAVE_WCSRTOMBS
  84   mbstate_t mbstate;
  85   return wcsrtombs((char *) NULL, &pwz, 0, &mbstate);
  86 #else  // !GNU libc
  87   return wcstombs((char *) NULL, pwz, 0);
  88 #endif // GNU
  89 }
  90 #endif // wxUSE_WCHAR_T
  91
  92 bool WXDLLEXPORT wxOKlibc()
  93 {
  94 #if wxUSE_WCHAR_T && defined(__UNIX__) && defined(__GLIBC__)
  95   // glibc 2.0 uses UTF-8 even when it shouldn't
  96   wchar_t res = 0;
  97   if ((MB_CUR_MAX == 2) &&
  98       (wxMB2WC(&res, "\xdd\xa5", 1) == 1) &&
  99       (res==0x765)) {
 100     // this is UTF-8 allright, check whether that's what we want
 101     char *cur_locale = setlocale(LC_CTYPE, NULL);
 102     if ((strlen(cur_locale) < 4) ||
 103         (strcasecmp(cur_locale + strlen(cur_locale) - 4, "utf8")) ||
 104         (strcasecmp(cur_locale + strlen(cur_locale) - 5, "utf-8"))) {
 105       // nope, don't use libc conversion
 106       return FALSE;
 107     }
 108   }
 109 #endif
 110   return TRUE;
 111 }
 112
 113 #ifndef HAVE_WCSLEN
 114 size_t   WXDLLEXPORT wcslen(const wchar_t *s)
 115 {
 116   size_t len = 0;
 117   while (s[len]) len++;
 118   return len;
 119 }
 120 #endif
 121
 122 #ifdef wxNEED_PRINTF_CONVERSION
 123
 124 #define CONVERT_FORMAT_1  \
 125     wxChar *new_format = (wxChar*) format; \
 126     size_t old_len = wxStrlen( format ); \
 127     int n = 0; \
 128     size_t i; \
 129     for (i = 0; i < old_len; i++) \
 130     { \
 131         if ( (format[i] == L'%') && \
 132              ((i < old_len) && ((format[i+1] == L's') || (format[i+1] == L'c'))) && \
 133              ((i == 0) || (format[i-1] != L'%')) ) \
 134         { \
 135             n++; \
 136         } \
 137     } \
 138  \
 139     if (n > 0) \
 140     { \
 141         new_format = new wxChar[old_len+n+1]; \
 142         wxChar *s = new_format; \
 143  \
 144         for (i = 0; i < old_len+1; i++) \
 145         { \
 146             if ( (format[i] == L'%') && \
 147                  ((i < old_len) && ((format[i+1] == L's') || (format[i+1] == L'c'))) && \
 148                  ((i == 0) || (format[i-1] != L'%')) ) \
 149             { \
 150                 *s = L'%'; \
 151                 s++; \
 152                 *s = L'l'; \
 153                 s++; \
 154             } \
 155             else \
 156             { \
 157                 *s = format[i]; \
 158                 s++; \
 159             } \
 160         } \
 161     }
 162
 163 #define CONVERT_FORMAT_2 \
 164     if (n > 0) \
 165         delete [] new_format;
 166
 167
 168 int wxScanf( const wxChar *format, ... ) ATTRIBUTE_PRINTF_2
 169 {
 170     CONVERT_FORMAT_1
 171
 172     va_list argptr;
 173     va_start(argptr, format);
 174
 175     int ret = vwscanf( new_format, argptr );
 176
 177     CONVERT_FORMAT_2
 178
 179     va_end(argptr);
 180
 181     return ret;
 182 }
 183
 184 int wxSscanf( const wxChar *str, const wxChar *format, ... ) ATTRIBUTE_PRINTF_3
 185 {
 186     CONVERT_FORMAT_1
 187
 188     va_list argptr;
 189     va_start(argptr, format);
 190
 191     int ret = vswscanf( str, new_format, argptr );
 192
 193     CONVERT_FORMAT_2
 194
 195     va_end(argptr);
 196
 197     return ret;
 198 }
 199
 200 int wxFscanf( FILE *stream, const wxChar *format, ... ) ATTRIBUTE_PRINTF_3
 201 {
 202     CONVERT_FORMAT_1
 203
 204     va_list argptr;
 205     va_start(argptr, format);
 206
 207     int ret = vfwscanf(stream, new_format, argptr);
 208
 209     CONVERT_FORMAT_2
 210
 211     va_end(argptr);
 212
 213     return ret;
 214 }
 215
 216 int wxVsscanf( const wxChar *str, const wxChar *format, va_list ap )
 217 {
 218     CONVERT_FORMAT_1
 219
 220     int ret = vswscanf( str, new_format, ap );
 221
 222     CONVERT_FORMAT_2
 223
 224     return ret;
 225 }
 226
 227 int wxPrintf( const wxChar *format, ... ) ATTRIBUTE_PRINTF_2
 228 {
 229     CONVERT_FORMAT_1
 230
 231     va_list argptr;
 232     va_start(argptr, format);
 233
 234     int ret = vwprintf( new_format, argptr );
 235
 236     CONVERT_FORMAT_2
 237
 238     va_end(argptr);
 239
 240     return ret;
 241 }
 242
 243 int wxSnprintf( wxChar *str, size_t size, const wxChar *format, ... ) ATTRIBUTE_PRINTF_4
 244 {
 245     CONVERT_FORMAT_1
 246
 247     va_list argptr;
 248     va_start(argptr, format);
 249
 250     int ret = vswprintf( str, size, new_format, argptr );
 251
 252     CONVERT_FORMAT_2
 253
 254     va_end(argptr);
 255
 256     return ret;
 257 }
 258
 259 int wxSprintf( wxChar *str, const wxChar *format, ... ) ATTRIBUTE_PRINTF_3
 260 {
 261     CONVERT_FORMAT_1
 262
 263     va_list argptr;
 264     va_start(argptr, format);
 265
 266     // Ugly
 267     int ret = vswprintf( str, 10000, new_format, argptr );
 268
 269     CONVERT_FORMAT_2
 270
 271     va_end(argptr);
 272
 273     return ret;
 274 }
 275
 276 int wxFprintf( FILE *stream, const wxChar *format, ... ) ATTRIBUTE_PRINTF_3
 277 {
 278     CONVERT_FORMAT_1
 279
 280     va_list argptr;
 281     va_start( argptr, format );
 282
 283     int ret = vfwprintf( stream, new_format, argptr );
 284
 285     CONVERT_FORMAT_2
 286
 287     va_end(argptr);
 288
 289     return ret;
 290 }
 291
 292 int wxVfprint( FILE *stream, const wxChar *format, va_list ap )
 293 {
 294     CONVERT_FORMAT_1
 295
 296     int ret = vfwprintf( stream, new_format, ap );
 297
 298     CONVERT_FORMAT_2
 299
 300     return ret;
 301 }
 302
 303 int wxVprintf( const wxChar *format, va_list ap )
 304 {
 305     CONVERT_FORMAT_1
 306
 307     int ret = vwprintf( new_format, ap );
 308
 309     CONVERT_FORMAT_2
 310
 311     return ret;
 312 }
 313
 314 int wxVsnprintf( wxChar *str, size_t size, const wxChar *format, va_list ap )
 315 {
 316     CONVERT_FORMAT_1
 317
 318     int ret = vswprintf( str, size, new_format, ap );
 319
 320     CONVERT_FORMAT_2
 321
 322     return ret;
 323 }
 324
 325 int wxVsprintf( wxChar *str, const wxChar *format, va_list ap )
 326 {
 327     CONVERT_FORMAT_1
 328
 329     // This is so ugly
 330     int ret = vswprintf(str, 10000, new_format, ap);
 331
 332     CONVERT_FORMAT_2
 333
 334     return ret;
 335 }
 336 #endif
 337
 338 #if !defined(wxVsnprintf) && !defined(wxHAS_VSNPRINTF)
 339 int WXDLLEXPORT wxVsnprintf(wxChar *buf, size_t len,
 340                             const wxChar *format, va_list argptr)
 341 {
 342 #if wxUSE_UNICODE
 343     wxString s;
 344     int iLen = s.PrintfV(format, argptr);
 345     if ( iLen != -1 )
 346     {
 347         wxStrncpy(buf, s.c_str(), len);
 348         buf[len-1] = wxT('\0');
 349     }
 350
 351     return iLen;
 352 #else // ANSI
 353     // vsnprintf() will not terminate the string with '\0' if there is not
 354     // enough place, but we want the string to always be NUL terminated
 355     int rc = wxVsnprintfA(buf, len - 1, format, argptr);
 356     if ( rc == -1 )
 357     {
 358         buf[len] = 0;
 359     }
 360
 361     return rc;
 362 #endif // Unicode/ANSI
 363 }
 364 #endif
 365
 366 #if !defined(wxSnprintf) && !defined(wxHAS_SNPRINTF)
 367 int WXDLLEXPORT wxSnprintf(wxChar *buf, size_t len,
 368                            const wxChar *format, ...)
 369 {
 370     va_list argptr;
 371     va_start(argptr, format);
 372
 373     int iLen = wxVsnprintf(buf, len, format, argptr);
 374
 375     va_end(argptr);
 376
 377     return iLen;
 378 }
 379 #endif
 380
 381 #if defined(__WIN32__) && defined(wxNEED_WX_CTYPE_H)
 382 inline WORD wxMSW_ctype(wxChar ch)
 383 {
 384   WORD ret;
 385   GetStringTypeEx(LOCALE_USER_DEFAULT, CT_CTYPE1, &ch, 1, &ret);
 386   return ret;
 387 }
 388
 389 WXDLLEXPORT int wxIsalnum(wxChar ch) { return IsCharAlphaNumeric(ch); }
 390 WXDLLEXPORT int wxIsalpha(wxChar ch) { return IsCharAlpha(ch); }
 391 WXDLLEXPORT int wxIsctrl(wxChar ch) { return wxMSW_ctype(ch) & C1_CNTRL; }
 392 WXDLLEXPORT int wxIsdigit(wxChar ch) { return wxMSW_ctype(ch) & C1_DIGIT; }
 393 WXDLLEXPORT int wxIsgraph(wxChar ch) { return wxMSW_ctype(ch) & (C1_DIGIT|C1_PUNCT|C1_ALPHA); }
 394 WXDLLEXPORT int wxIslower(wxChar ch) { return IsCharLower(ch); }
 395 WXDLLEXPORT int wxIsprint(wxChar ch) { return wxMSW_ctype(ch) & (C1_DIGIT|C1_SPACE|C1_PUNCT|C1_ALPHA); }
 396 WXDLLEXPORT int wxIspunct(wxChar ch) { return wxMSW_ctype(ch) & C1_PUNCT; }
 397 WXDLLEXPORT int wxIsspace(wxChar ch) { return wxMSW_ctype(ch) & C1_SPACE; }
 398 WXDLLEXPORT int wxIsupper(wxChar ch) { return IsCharUpper(ch); }
 399 WXDLLEXPORT int wxIsxdigit(wxChar ch) { return wxMSW_ctype(ch) & C1_XDIGIT; }
 400 WXDLLEXPORT int wxTolower(wxChar ch) { return (wxChar)CharLower((LPTSTR)(ch)); }
 401 WXDLLEXPORT int wxToupper(wxChar ch) { return (wxChar)CharUpper((LPTSTR)(ch)); }
 402 #endif
 403
 404 #ifndef wxStrdup
 405 WXDLLEXPORT wxChar * wxStrdup(const wxChar *psz)
 406 {
 407   size_t size = (wxStrlen(psz) + 1) * sizeof(wxChar);
 408   wxChar *ret = (wxChar *) malloc(size);
 409   memcpy(ret, psz, size);
 410   return ret;
 411 }
 412 #endif
 413
 414 #ifndef wxStricmp
 415 int WXDLLEXPORT wxStricmp(const wxChar *psz1, const wxChar *psz2)
 416 {
 417   register wxChar c1, c2;
 418   do {
 419     c1 = wxTolower(*psz1++);
 420     c2 = wxTolower(*psz2++);
 421   } while ( c1 && (c1 == c2) );
 422   return c1 - c2;
 423 }
 424 #endif
 425
 426 #ifndef wxStricmp
 427 int WXDLLEXPORT wxStrnicmp(const wxChar *s1, const wxChar *s2, size_t n)
 428 {
 429   register wxChar c1, c2;
 430   while (n && ((c1 = wxTolower(*s1)) == (c2 = wxTolower(*s2)) ) && c1) n--, s1++, s2++;
 431   if (n) {
 432     if (c1 < c2) return -1;
 433     if (c1 > c2) return 1;
 434   }
 435   return 0;
 436 }
 437 #endif
 438
 439 #ifndef wxStrtok
 440 WXDLLEXPORT wxChar * wxStrtok(wxChar *psz, const wxChar *delim, wxChar **save_ptr)
 441 {
 442   if (!psz) psz = *save_ptr;
 443   psz += wxStrspn(psz, delim);
 444   if (!*psz) {
 445     *save_ptr = (wxChar *)NULL;
 446     return (wxChar *)NULL;
 447   }
 448   wxChar *ret = psz;
 449   psz = wxStrpbrk(psz, delim);
 450   if (!psz) *save_ptr = (wxChar*)NULL;
 451   else {
 452     *psz = wxT('\0');
 453     *save_ptr = psz + 1;
 454   }
 455   return ret;
 456 }
 457 #endif
 458
 459 #ifndef wxSetlocale
 460 WXDLLEXPORT wxWCharBuffer wxSetlocale(int category, const wxChar *locale)
 461 {
 462     char *localeOld = setlocale(category, wxConvLocal.cWX2MB(locale));
 463
 464     return wxWCharBuffer(wxConvLocal.cMB2WC(localeOld));
 465 }
 466 #endif
 467
 468 #ifdef wxNEED_WX_STRING_H
 469 WXDLLEXPORT wxChar * wxStrcat(wxChar *dest, const wxChar *src)
 470 {
 471   wxChar *ret = dest;
 472   while (*dest) dest++;
 473   while ((*dest++ = *src++));
 474   return ret;
 475 }
 476
 477 WXDLLEXPORT const wxChar * wxStrchr(const wxChar *s, wxChar c)
 478 {
 479     // be careful here as the terminating NUL makes part of the string
 480     while ( *s != c )
 481     {
 482         if ( !*s++ )
 483             return NULL;
 484     }
 485
 486     return s;
 487 }
 488
 489 WXDLLEXPORT int wxStrcmp(const wxChar *s1, const wxChar *s2)
 490 {
 491   while ((*s1 == *s2) && *s1) s1++, s2++;
 492   if ((wxUChar)*s1 < (wxUChar)*s2) return -1;
 493   if ((wxUChar)*s1 > (wxUChar)*s2) return 1;
 494   return 0;
 495 }
 496
 497 WXDLLEXPORT wxChar * wxStrcpy(wxChar *dest, const wxChar *src)
 498 {
 499   wxChar *ret = dest;
 500   while ((*dest++ = *src++));
 501   return ret;
 502 }
 503
 504 WXDLLEXPORT wxChar * wxStrncat(wxChar *dest, const wxChar *src, size_t n)
 505 {
 506   wxChar *ret = dest;
 507   while (*dest) dest++;
 508   while (n && (*dest++ = *src++)) n--;
 509   return ret;
 510 }
 511
 512 WXDLLEXPORT int wxStrncmp(const wxChar *s1, const wxChar *s2, size_t n)
 513 {
 514   while (n && (*s1 == *s2) && *s1) n--, s1++, s2++;
 515   if (n) {
 516     if ((wxUChar)*s1 < (wxUChar)*s2) return -1;
 517     if ((wxUChar)*s1 > (wxUChar)*s2) return 1;
 518   }
 519   return 0;
 520 }
 521
 522 WXDLLEXPORT wxChar * wxStrncpy(wxChar *dest, const wxChar *src, size_t n)
 523 {
 524   wxChar *ret = dest;
 525   while (n && (*dest++ = *src++)) n--;
 526   while (n) *dest++=0, n--; // the docs specify padding with zeroes
 527   return ret;
 528 }
 529
 530 WXDLLEXPORT const wxChar * wxStrpbrk(const wxChar *s, const wxChar *accept)
 531 {
 532   while (*s && !wxStrchr(accept, *s))
 533       s++;
 534
 535   return *s ? s : NULL;
 536 }
 537
 538 WXDLLEXPORT const wxChar * wxStrrchr(const wxChar *s, wxChar c)
 539 {
 540     const wxChar *ret = NULL;
 541     do
 542     {
 543         if ( *s == c )
 544             ret = s;
 545         s++;
 546     }
 547     while ( *s );
 548
 549     return ret;
 550 }
 551
 552 WXDLLEXPORT size_t wxStrspn(const wxChar *s, const wxChar *accept)
 553 {
 554   size_t len = 0;
 555   while (wxStrchr(accept, *s++)) len++;
 556   return len;
 557 }
 558
 559 WXDLLEXPORT const wxChar *wxStrstr(const wxChar *haystack, const wxChar *needle)
 560 {
 561     wxCHECK_RET( needle, NULL, _T("NULL argument in wxStrstr") );
 562
 563     // VZ: this is not exactly the most efficient string search algorithm...
 564
 565     const size_t len = wxStrlen(needle);
 566
 567     while ( const wxChar *fnd = wxStrchr(haystack, *needle) )
 568     {
 569         if ( !wxStrncmp(fnd, needle, len) )
 570             return fnd;
 571
 572         haystack = fnd + 1;
 573     }
 574
 575     return NULL;
 576 }
 577
 578 WXDLLEXPORT double wxStrtod(const wxChar *nptr, wxChar **endptr)
 579 {
 580   const wxChar *start = nptr;
 581
 582   // FIXME: only correct for C locale
 583   while (wxIsspace(*nptr)) nptr++;
 584   if (*nptr == wxT('+') || *nptr == wxT('-')) nptr++;
 585   while (wxIsdigit(*nptr)) nptr++;
 586   if (*nptr == wxT('.')) {
 587     nptr++;
 588     while (wxIsdigit(*nptr)) nptr++;
 589   }
 590   if (*nptr == wxT('E') || *nptr == wxT('e')) {
 591     nptr++;
 592     if (*nptr == wxT('+') || *nptr == wxT('-')) nptr++;
 593     while (wxIsdigit(*nptr)) nptr++;
 594   }
 595
 596   wxString data(nptr, nptr-start);
 597   wxWX2MBbuf dat = data.mb_str(wxConvLocal);
 598   char *rdat = wxMBSTRINGCAST dat;
 599   double ret = strtod(dat, &rdat);
 600
 601   if (endptr) *endptr = (wxChar *)(start + (rdat - (const char *)dat));
 602
 603   return ret;
 604 }
 605
 606 WXDLLEXPORT long int wxStrtol(const wxChar *nptr, wxChar **endptr, int base)
 607 {
 608   const wxChar *start = nptr;
 609
 610   // FIXME: only correct for C locale
 611   while (wxIsspace(*nptr)) nptr++;
 612   if (*nptr == wxT('+') || *nptr == wxT('-')) nptr++;
 613   if (((base == 0) || (base == 16)) &&
 614       (nptr[0] == wxT('0') && nptr[1] == wxT('x'))) {
 615     nptr += 2;
 616     base = 16;
 617   }
 618   else if ((base == 0) && (nptr[0] == wxT('0'))) base = 8;
 619   else if (base == 0) base = 10;
 620
 621   while ((wxIsdigit(*nptr) && (*nptr - wxT('0') < base)) ||
 622          (wxIsalpha(*nptr) && (wxToupper(*nptr) - wxT('A') + 10 < base))) nptr++;
 623
 624   wxString data(nptr, nptr-start);
 625   wxWX2MBbuf dat = data.mb_str(wxConvLocal);
 626   char *rdat = wxMBSTRINGCAST dat;
 627   long int ret = strtol(dat, &rdat, base);
 628
 629   if (endptr) *endptr = (wxChar *)(start + (rdat - (const char *)dat));
 630
 631   return ret;
 632 }
 633 #endif
 634
 635 #ifdef wxNEED_WX_STDIO_H
 636 WXDLLEXPORT FILE * wxFopen(const wxChar *path, const wxChar *mode)
 637 {
 638     char mode_buffer[10];
 639     for (size_t i = 0; i < wxStrlen(mode)+1; i++)
 640        mode_buffer[i] = (char) mode[i];
 641
 642     return fopen( wxConvFile.cWX2MB(path), mode_buffer );
 643 }
 644
 645 WXDLLEXPORT FILE * wxFreopen(const wxChar *path, const wxChar *mode, FILE *stream)
 646 {
 647     char mode_buffer[10];
 648     for (size_t i = 0; i < wxStrlen(mode)+1; i++)
 649        mode_buffer[i] = (char) mode[i];
 650
 651     return freopen( wxConvFile.cWX2MB(path), mode_buffer, stream );
 652 }
 653
 654 WXDLLEXPORT int wxRemove(const wxChar *path)
 655 {
 656     return remove( wxConvFile.cWX2MB(path) );
 657 }
 658
 659 WXDLLEXPORT int wxRename(const wxChar *oldpath, const wxChar *newpath)
 660 {
 661     return rename( wxConvFile.cWX2MB(oldpath), wxConvFile.cWX2MB(newpath) );
 662 }
 663 #endif
 664
 665 #ifndef wxAtof
 666 double   WXDLLEXPORT wxAtof(const wxChar *psz)
 667 {
 668   return atof(wxConvLocal.cWX2MB(psz));
 669 }
 670 #endif
 671
 672 #ifdef wxNEED_WX_STDLIB_H
 673 int      WXDLLEXPORT wxAtoi(const wxChar *psz)
 674 {
 675   return atoi(wxConvLocal.cWX2MB(psz));
 676 }
 677
 678 long     WXDLLEXPORT wxAtol(const wxChar *psz)
 679 {
 680   return atol(wxConvLocal.cWX2MB(psz));
 681 }
 682
 683 wxChar * WXDLLEXPORT wxGetenv(const wxChar *name)
 684 {
 685   static wxHashTable env;
 686
 687   // check if we already have stored the converted env var
 688   wxObject *data = env.Get(name);
 689   if (!data)
 690   {
 691     // nope, retrieve it,
 692 #if wxUSE_UNICODE
 693     wxCharBuffer buffer = wxConvLocal.cWX2MB(name);
 694     // printf( "buffer %s\n", (const char*) buffer );
 695     const char *val = getenv( (const char *)buffer );
 696 #else
 697     const char *val = getenv( name );
 698 #endif
 699
 700     if (!val) return (wxChar *)NULL;
 701     // printf( "home %s\n", val );
 702
 703     // convert it,
 704 #ifdef wxUSE_UNICODE
 705     data = (wxObject *)new wxString(val, wxConvLocal);
 706 #else
 707     data = (wxObject *)new wxString(val);
 708 #endif
 709
 710     // and store it
 711     env.Put(name, data);
 712   }
 713   // return converted env var
 714   return (wxChar *)((wxString *)data)->c_str();
 715 }
 716
 717 int WXDLLEXPORT wxSystem(const wxChar *psz)
 718 {
 719     return system(wxConvLocal.cWX2MB(psz));
 720 }
 721
 722 #endif
 723
 724 #ifdef wxNEED_WX_TIME_H
 725 WXDLLEXPORT size_t   wxStrftime(wxChar *s, size_t max, const wxChar *fmt, const struct tm *tm)
 726 {
 727     if (!max) return 0;
 728
 729     char *buf = (char *)malloc(max);
 730     size_t ret = strftime(buf, max, wxConvLocal.cWX2MB(fmt), tm);
 731     if (ret)
 732     {
 733         wxStrcpy(s, wxConvLocal.cMB2WX(buf));
 734         free(buf);
 735         return wxStrlen(s);
 736     }
 737     else
 738     {
 739         free(buf);
 740         *s = 0;
 741         return 0;
 742   }
 743 }
 744 #endif