src/common/strconv.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/strconv.cpp
   3 // Purpose:     Unicode conversion classes
   4 // Author:      Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik,
   5 //              Ryan Norton, Fredrik Roubert (UTF7)
   6 // Modified by:
   7 // Created:     29/01/98
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 1999 Ove Kaaven, Robert Roebling, Vaclav Slavik
  10 //              (c) 2000-2003 Vadim Zeitlin
  11 //              (c) 2004 Ryan Norton, Fredrik Roubert
  12 // Licence:     wxWindows licence
  13 /////////////////////////////////////////////////////////////////////////////
  14
  15 // ============================================================================
  16 // declarations
  17 // ============================================================================
  18
  19 // ----------------------------------------------------------------------------
  20 // headers
  21 // ----------------------------------------------------------------------------
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27   #pragma hdrstop
  28 #endif
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/intl.h"
  32     #include "wx/log.h"
  33 #endif // WX_PRECOMP
  34
  35 #include "wx/strconv.h"
  36
  37 #if wxUSE_WCHAR_T
  38
  39 #ifdef __WINDOWS__
  40     #include "wx/msw/private.h"
  41     #include "wx/msw/missing.h"
  42 #endif
  43
  44 #ifndef __WXWINCE__
  45 #include <errno.h>
  46 #endif
  47
  48 #include <ctype.h>
  49 #include <string.h>
  50 #include <stdlib.h>
  51
  52 #if defined(__WIN32__) && !defined(__WXMICROWIN__)
  53     #define wxHAVE_WIN32_MB2WC
  54 #endif // __WIN32__ but !__WXMICROWIN__
  55
  56 #ifdef __SALFORDC__
  57     #include <clib.h>
  58 #endif
  59
  60 #ifdef HAVE_ICONV
  61     #include <iconv.h>
  62     #include "wx/thread.h"
  63 #endif
  64
  65 #include "wx/encconv.h"
  66 #include "wx/fontmap.h"
  67 #include "wx/utils.h"
  68
  69 #ifdef __WXMAC__
  70 #ifndef __DARWIN__
  71 #include <ATSUnicode.h>
  72 #include <TextCommon.h>
  73 #include <TextEncodingConverter.h>
  74 #endif
  75
  76 #include  "wx/mac/private.h"  // includes mac headers
  77 #endif
  78
  79 #define TRACE_STRCONV _T("strconv")
  80
  81 #if SIZEOF_WCHAR_T == 2
  82     #define WC_UTF16
  83 #endif
  84
  85 // ============================================================================
  86 // implementation
  87 // ============================================================================
  88
  89 // ----------------------------------------------------------------------------
  90 // UTF-16 en/decoding to/from UCS-4
  91 // ----------------------------------------------------------------------------
  92
  93
  94 static size_t encode_utf16(wxUint32 input, wxUint16 *output)
  95 {
  96     if (input<=0xffff)
  97     {
  98         if (output)
  99             *output = (wxUint16) input;
 100         return 1;
 101     }
 102     else if (input>=0x110000)
 103     {
 104         return (size_t)-1;
 105     }
 106     else
 107     {
 108         if (output)
 109         {
 110             *output++ = (wxUint16) ((input >> 10)+0xd7c0);
 111             *output = (wxUint16) ((input&0x3ff)+0xdc00);
 112         }
 113         return 2;
 114     }
 115 }
 116
 117 static size_t decode_utf16(const wxUint16* input, wxUint32& output)
 118 {
 119     if ((*input<0xd800) || (*input>0xdfff))
 120     {
 121         output = *input;
 122         return 1;
 123     }
 124     else if ((input[1]<0xdc00) || (input[1]>0xdfff))
 125     {
 126         output = *input;
 127         return (size_t)-1;
 128     }
 129     else
 130     {
 131         output = ((input[0] - 0xd7c0) << 10) + (input[1] - 0xdc00);
 132         return 2;
 133     }
 134 }
 135
 136
 137 // ----------------------------------------------------------------------------
 138 // wxMBConv
 139 // ----------------------------------------------------------------------------
 140
 141 wxMBConv::~wxMBConv()
 142 {
 143     // nothing to do here (necessary for Darwin linking probably)
 144 }
 145
 146 const wxWCharBuffer wxMBConv::cMB2WC(const char *psz) const
 147 {
 148     if ( psz )
 149     {
 150         // calculate the length of the buffer needed first
 151         size_t nLen = MB2WC(NULL, psz, 0);
 152         if ( nLen != (size_t)-1 )
 153         {
 154             // now do the actual conversion
 155             wxWCharBuffer buf(nLen);
 156             nLen = MB2WC(buf.data(), psz, nLen + 1); // with the trailing NULL
 157             if ( nLen != (size_t)-1 )
 158             {
 159                 return buf;
 160             }
 161         }
 162     }
 163
 164     wxWCharBuffer buf((wchar_t *)NULL);
 165
 166     return buf;
 167 }
 168
 169 const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *pwz) const
 170 {
 171     if ( pwz )
 172     {
 173         size_t nLen = WC2MB(NULL, pwz, 0);
 174         if ( nLen != (size_t)-1 )
 175         {
 176             wxCharBuffer buf(nLen+3);       // space for a wxUint32 trailing zero
 177             nLen = WC2MB(buf.data(), pwz, nLen + 4);
 178             if ( nLen != (size_t)-1 )
 179             {
 180                 return buf;
 181             }
 182         }
 183     }
 184
 185     wxCharBuffer buf((char *)NULL);
 186
 187     return buf;
 188 }
 189
 190 const wxWCharBuffer wxMBConv::cMB2WC(const char *szString, size_t nStringLen, size_t* pOutSize) const
 191 {
 192     wxASSERT(pOutSize != NULL);
 193
 194     const char* szEnd = szString + nStringLen + 1;
 195     const char* szPos = szString;
 196     const char* szStart = szPos;
 197
 198     size_t nActualLength = 0;
 199     size_t nCurrentSize = nStringLen; //try normal size first (should never resize?)
 200
 201     wxWCharBuffer theBuffer(nCurrentSize);
 202
 203     //Convert the string until the length() is reached, continuing the
 204     //loop every time a null character is reached
 205     while(szPos != szEnd)
 206     {
 207         wxASSERT(szPos < szEnd); //something is _really_ screwed up if this rings true
 208
 209         //Get the length of the current (sub)string
 210         size_t nLen = MB2WC(NULL, szPos, 0);
 211
 212         //Invalid conversion?
 213         if( nLen == (size_t)-1 )
 214         {
 215             *pOutSize = 0;
 216             theBuffer.data()[0u] = wxT('\0');
 217             return theBuffer;
 218         }
 219
 220
 221         //Increase the actual length (+1 for current null character)
 222         nActualLength += nLen + 1;
 223
 224         //if buffer too big, realloc the buffer
 225         if (nActualLength > (nCurrentSize+1))
 226         {
 227             wxWCharBuffer theNewBuffer(nCurrentSize << 1);
 228             memcpy(theNewBuffer.data(), theBuffer.data(), nCurrentSize * sizeof(wchar_t));
 229             theBuffer = theNewBuffer;
 230             nCurrentSize <<= 1;
 231         }
 232
 233         //Convert the current (sub)string
 234         if ( MB2WC(&theBuffer.data()[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
 235         {
 236             *pOutSize = 0;
 237             theBuffer.data()[0u] = wxT('\0');
 238             return theBuffer;
 239         }
 240
 241         //Increment to next (sub)string
 242         //Note that we have to use strlen instead of nLen here
 243         //because XX2XX gives us the size of the output buffer,
 244         //which is not necessarily the length of the string
 245         szPos += strlen(szPos) + 1;
 246     }
 247
 248     //success - return actual length and the buffer
 249     *pOutSize = nActualLength;
 250     return theBuffer;
 251 }
 252
 253 const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *szString, size_t nStringLen, size_t* pOutSize) const
 254 {
 255     wxASSERT(pOutSize != NULL);
 256
 257     const wchar_t* szEnd = szString + nStringLen + 1;
 258     const wchar_t* szPos = szString;
 259     const wchar_t* szStart = szPos;
 260
 261     size_t nActualLength = 0;
 262     size_t nCurrentSize = nStringLen << 2; //try * 4 first
 263
 264     wxCharBuffer theBuffer(nCurrentSize);
 265
 266     //Convert the string until the length() is reached, continuing the
 267     //loop every time a null character is reached
 268     while(szPos != szEnd)
 269     {
 270         wxASSERT(szPos < szEnd); //something is _really_ screwed up if this rings true
 271
 272         //Get the length of the current (sub)string
 273         size_t nLen = WC2MB(NULL, szPos, 0);
 274
 275         //Invalid conversion?
 276         if( nLen == (size_t)-1 )
 277         {
 278             *pOutSize = 0;
 279             theBuffer.data()[0u] = wxT('\0');
 280             return theBuffer;
 281         }
 282
 283         //Increase the actual length (+1 for current null character)
 284         nActualLength += nLen + 1;
 285
 286         //if buffer too big, realloc the buffer
 287         if (nActualLength > (nCurrentSize+1))
 288         {
 289             wxCharBuffer theNewBuffer(nCurrentSize << 1);
 290             memcpy(theNewBuffer.data(), theBuffer.data(), nCurrentSize);
 291             theBuffer = theNewBuffer;
 292             nCurrentSize <<= 1;
 293         }
 294
 295         //Convert the current (sub)string
 296         if(WC2MB(&theBuffer.data()[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
 297         {
 298             *pOutSize = 0;
 299             theBuffer.data()[0u] = wxT('\0');
 300             return theBuffer;
 301         }
 302
 303         //Increment to next (sub)string
 304         //Note that we have to use wxWcslen instead of nLen here
 305         //because XX2XX gives us the size of the output buffer,
 306         //which is not necessarily the length of the string
 307         szPos += wxWcslen(szPos) + 1;
 308     }
 309
 310     //success - return actual length and the buffer
 311     *pOutSize = nActualLength;
 312     return theBuffer;
 313 }
 314
 315 // ----------------------------------------------------------------------------
 316 // wxMBConvLibc
 317 // ----------------------------------------------------------------------------
 318
 319 size_t wxMBConvLibc::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 320 {
 321     return wxMB2WC(buf, psz, n);
 322 }
 323
 324 size_t wxMBConvLibc::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 325 {
 326     return wxWC2MB(buf, psz, n);
 327 }
 328
 329 #ifdef __UNIX__
 330
 331 // ----------------------------------------------------------------------------
 332 // wxConvBrokenFileNames
 333 // ----------------------------------------------------------------------------
 334
 335 wxConvBrokenFileNames::wxConvBrokenFileNames(const wxChar *charset)
 336 {
 337     if ( !charset || wxStricmp(charset, _T("UTF-8")) == 0
 338                   || wxStricmp(charset, _T("UTF8")) == 0  )
 339         m_conv = new wxMBConvUTF8(wxMBConvUTF8::MAP_INVALID_UTF8_TO_OCTAL);
 340     else
 341         m_conv = new wxCSConv(charset);
 342 }
 343
 344 size_t
 345 wxConvBrokenFileNames::MB2WC(wchar_t *outputBuf,
 346                              const char *psz,
 347                              size_t outputSize) const
 348 {
 349     return m_conv->MB2WC( outputBuf, psz, outputSize );
 350 }
 351
 352 size_t
 353 wxConvBrokenFileNames::WC2MB(char *outputBuf,
 354                              const wchar_t *psz,
 355                              size_t outputSize) const
 356 {
 357     return m_conv->WC2MB( outputBuf, psz, outputSize );
 358 }
 359
 360 #endif
 361
 362 // ----------------------------------------------------------------------------
 363 // UTF-7
 364 // ----------------------------------------------------------------------------
 365
 366 // Implementation (C) 2004 Fredrik Roubert
 367
 368 //
 369 // BASE64 decoding table
 370 //
 371 static const unsigned char utf7unb64[] =
 372 {
 373     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 374     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 375     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 376     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 377     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 378     0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
 379     0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
 380     0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 381     0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
 382     0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
 383     0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
 384     0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
 385     0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
 386     0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
 387     0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
 388     0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
 389     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 390     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 391     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 392     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 393     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 394     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 395     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 396     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 397     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 398     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 399     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 400     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 401     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 402     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 403     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 404     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
 405 };
 406
 407 size_t wxMBConvUTF7::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 408 {
 409     size_t len = 0;
 410
 411     while (*psz && ((!buf) || (len < n)))
 412     {
 413         unsigned char cc = *psz++;
 414         if (cc != '+')
 415         {
 416             // plain ASCII char
 417             if (buf)
 418                 *buf++ = cc;
 419             len++;
 420         }
 421         else if (*psz == '-')
 422         {
 423             // encoded plus sign
 424             if (buf)
 425                 *buf++ = cc;
 426             len++;
 427             psz++;
 428         }
 429         else
 430         {
 431             // BASE64 encoded string
 432             bool lsb;
 433             unsigned char c;
 434             unsigned int d, l;
 435             for (lsb = false, d = 0, l = 0;
 436                 (cc = utf7unb64[(unsigned char)*psz]) != 0xff; psz++)
 437             {
 438                 d <<= 6;
 439                 d += cc;
 440                 for (l += 6; l >= 8; lsb = !lsb)
 441                 {
 442                     c = (unsigned char)((d >> (l -= 8)) % 256);
 443                     if (lsb)
 444                     {
 445                         if (buf)
 446                             *buf++ |= c;
 447                         len ++;
 448                     }
 449                     else
 450                         if (buf)
 451                             *buf = (wchar_t)(c << 8);
 452                 }
 453             }
 454             if (*psz == '-')
 455                 psz++;
 456         }
 457     }
 458     if (buf && (len < n))
 459         *buf = 0;
 460     return len;
 461 }
 462
 463 //
 464 // BASE64 encoding table
 465 //
 466 static const unsigned char utf7enb64[] =
 467 {
 468     'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
 469     'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
 470     'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
 471     'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
 472     'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
 473     'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
 474     'w', 'x', 'y', 'z', '0', '1', '2', '3',
 475     '4', '5', '6', '7', '8', '9', '+', '/'
 476 };
 477
 478 //
 479 // UTF-7 encoding table
 480 //
 481 // 0 - Set D (directly encoded characters)
 482 // 1 - Set O (optional direct characters)
 483 // 2 - whitespace characters (optional)
 484 // 3 - special characters
 485 //
 486 static const unsigned char utf7encode[128] =
 487 {
 488     3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 3, 3, 2, 3, 3,
 489     3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 490     2, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 3, 0, 0, 0, 3,
 491     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0,
 492     1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 493     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 1, 1, 1,
 494     1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 495     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 3, 3
 496 };
 497
 498 size_t wxMBConvUTF7::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 499 {
 500
 501
 502     size_t len = 0;
 503
 504     while (*psz && ((!buf) || (len < n)))
 505     {
 506         wchar_t cc = *psz++;
 507         if (cc < 0x80 && utf7encode[cc] < 1)
 508         {
 509             // plain ASCII char
 510             if (buf)
 511                 *buf++ = (char)cc;
 512             len++;
 513         }
 514 #ifndef WC_UTF16
 515         else if (((wxUint32)cc) > 0xffff)
 516         {
 517             // no surrogate pair generation (yet?)
 518             return (size_t)-1;
 519         }
 520 #endif
 521         else
 522         {
 523             if (buf)
 524                 *buf++ = '+';
 525             len++;
 526             if (cc != '+')
 527             {
 528                 // BASE64 encode string
 529                 unsigned int lsb, d, l;
 530                 for (d = 0, l = 0; /*nothing*/; psz++)
 531                 {
 532                     for (lsb = 0; lsb < 2; lsb ++)
 533                     {
 534                         d <<= 8;
 535                         d += lsb ? cc & 0xff : (cc & 0xff00) >> 8;
 536
 537                         for (l += 8; l >= 6; )
 538                         {
 539                             l -= 6;
 540                             if (buf)
 541                                 *buf++ = utf7enb64[(d >> l) % 64];
 542                             len++;
 543                         }
 544                     }
 545                     cc = *psz;
 546                     if (!(cc) || (cc < 0x80 && utf7encode[cc] < 1))
 547                         break;
 548                 }
 549                 if (l != 0)
 550                 {
 551                     if (buf)
 552                         *buf++ = utf7enb64[((d % 16) << (6 - l)) % 64];
 553                     len++;
 554                 }
 555             }
 556             if (buf)
 557                 *buf++ = '-';
 558             len++;
 559         }
 560     }
 561     if (buf && (len < n))
 562         *buf = 0;
 563     return len;
 564 }
 565
 566 // ----------------------------------------------------------------------------
 567 // UTF-8
 568 // ----------------------------------------------------------------------------
 569
 570 static wxUint32 utf8_max[]=
 571     { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff, 0xffffffff };
 572
 573 // boundaries of the private use area we use to (temporarily) remap invalid
 574 // characters invalid in a UTF-8 encoded string
 575 const wxUint32 wxUnicodePUA = 0x100000;
 576 const wxUint32 wxUnicodePUAEnd = wxUnicodePUA + 256;
 577
 578 size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 579 {
 580     size_t len = 0;
 581
 582     while (*psz && ((!buf) || (len < n)))
 583     {
 584         const char *opsz = psz;
 585         bool invalid = false;
 586         unsigned char cc = *psz++, fc = cc;
 587         unsigned cnt;
 588         for (cnt = 0; fc & 0x80; cnt++)
 589             fc <<= 1;
 590         if (!cnt)
 591         {
 592             // plain ASCII char
 593             if (buf)
 594                 *buf++ = cc;
 595             len++;
 596
 597             // escape the escape character for octal escapes
 598             if ((m_options & MAP_INVALID_UTF8_TO_OCTAL)
 599                     && cc == '\\' && (!buf || len < n))
 600             {
 601                 if (buf)
 602                     *buf++ = cc;
 603                 len++;
 604             }
 605         }
 606         else
 607         {
 608             cnt--;
 609             if (!cnt)
 610             {
 611                 // invalid UTF-8 sequence
 612                 invalid = true;
 613             }
 614             else
 615             {
 616                 unsigned ocnt = cnt - 1;
 617                 wxUint32 res = cc & (0x3f >> cnt);
 618                 while (cnt--)
 619                 {
 620                     cc = *psz;
 621                     if ((cc & 0xC0) != 0x80)
 622                     {
 623                         // invalid UTF-8 sequence
 624                         invalid = true;
 625                         break;
 626                     }
 627                     psz++;
 628                     res = (res << 6) | (cc & 0x3f);
 629                 }
 630                 if (invalid || res <= utf8_max[ocnt])
 631                 {
 632                     // illegal UTF-8 encoding
 633                     invalid = true;
 634                 }
 635                 else if ((m_options & MAP_INVALID_UTF8_TO_PUA) &&
 636                         res >= wxUnicodePUA && res < wxUnicodePUAEnd)
 637                 {
 638                     // if one of our PUA characters turns up externally
 639                     // it must also be treated as an illegal sequence
 640                     // (a bit like you have to escape an escape character)
 641                     invalid = true;
 642                 }
 643                 else
 644                 {
 645 #ifdef WC_UTF16
 646                     // cast is ok because wchar_t == wxUuint16 if WC_UTF16
 647                     size_t pa = encode_utf16(res, (wxUint16 *)buf);
 648                     if (pa == (size_t)-1)
 649                     {
 650                         invalid = true;
 651                     }
 652                     else
 653                     {
 654                         if (buf)
 655                             buf += pa;
 656                         len += pa;
 657                     }
 658 #else // !WC_UTF16
 659                     if (buf)
 660                         *buf++ = (wchar_t)res;
 661                     len++;
 662 #endif // WC_UTF16/!WC_UTF16
 663                 }
 664             }
 665             if (invalid)
 666             {
 667                 if (m_options & MAP_INVALID_UTF8_TO_PUA)
 668                 {
 669                     while (opsz < psz && (!buf || len < n))
 670                     {
 671 #ifdef WC_UTF16
 672                         // cast is ok because wchar_t == wxUuint16 if WC_UTF16
 673                         size_t pa = encode_utf16((unsigned char)*opsz + wxUnicodePUA, (wxUint16 *)buf);
 674                         wxASSERT(pa != (size_t)-1);
 675                         if (buf)
 676                             buf += pa;
 677                         opsz++;
 678                         len += pa;
 679 #else
 680                         if (buf)
 681                             *buf++ = (wchar_t)(wxUnicodePUA + (unsigned char)*opsz);
 682                         opsz++;
 683                         len++;
 684 #endif
 685                     }
 686                 }
 687                 else if (m_options & MAP_INVALID_UTF8_TO_OCTAL)
 688                 {
 689                     while (opsz < psz && (!buf || len < n))
 690                     {
 691                         if ( buf && len + 3 < n )
 692                         {
 693                             unsigned char on = *opsz;
 694                             *buf++ = L'\\';
 695                             *buf++ = (wchar_t)( L'0' + on / 0100 );
 696                             *buf++ = (wchar_t)( L'0' + (on % 0100) / 010 );
 697                             *buf++ = (wchar_t)( L'0' + on % 010 );
 698                         }
 699                         opsz++;
 700                         len += 4;
 701                     }
 702                 }
 703                 else // MAP_INVALID_UTF8_NOT
 704                 {
 705                     return (size_t)-1;
 706                 }
 707             }
 708         }
 709     }
 710     if (buf && (len < n))
 711         *buf = 0;
 712     return len;
 713 }
 714
 715 static inline bool isoctal(wchar_t wch)
 716 {
 717     return L'0' <= wch && wch <= L'7';
 718 }
 719
 720 size_t wxMBConvUTF8::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 721 {
 722     size_t len = 0;
 723
 724     while (*psz && ((!buf) || (len < n)))
 725     {
 726         wxUint32 cc;
 727 #ifdef WC_UTF16
 728         // cast is ok for WC_UTF16
 729         size_t pa = decode_utf16((const wxUint16 *)psz, cc);
 730         psz += (pa == (size_t)-1) ? 1 : pa;
 731 #else
 732         cc=(*psz++) & 0x7fffffff;
 733 #endif
 734
 735         if ( (m_options & MAP_INVALID_UTF8_TO_PUA)
 736                 && cc >= wxUnicodePUA && cc < wxUnicodePUAEnd )
 737         {
 738             if (buf)
 739                 *buf++ = (char)(cc - wxUnicodePUA);
 740             len++;
 741         }
 742         else if ( (m_options & MAP_INVALID_UTF8_TO_OCTAL)
 743                     && cc == L'\\' && psz[0] == L'\\' )
 744         {
 745             if (buf)
 746                 *buf++ = (char)cc;
 747             psz++;
 748             len++;
 749         }
 750         else if ( (m_options & MAP_INVALID_UTF8_TO_OCTAL) &&
 751                     cc == L'\\' &&
 752                         isoctal(psz[0]) && isoctal(psz[1]) && isoctal(psz[2]) )
 753         {
 754             if (buf)
 755             {
 756                 *buf++ = (char) ((psz[0] - L'0')*0100 +
 757                                  (psz[1] - L'0')*010 +
 758                                  (psz[2] - L'0'));
 759             }
 760
 761             psz += 3;
 762             len++;
 763         }
 764         else
 765         {
 766             unsigned cnt;
 767             for (cnt = 0; cc > utf8_max[cnt]; cnt++) {}
 768             if (!cnt)
 769             {
 770                 // plain ASCII char
 771                 if (buf)
 772                     *buf++ = (char) cc;
 773                 len++;
 774             }
 775
 776             else
 777             {
 778                 len += cnt + 1;
 779                 if (buf)
 780                 {
 781                     *buf++ = (char) ((-128 >> cnt) | ((cc >> (cnt * 6)) & (0x3f >> cnt)));
 782                     while (cnt--)
 783                         *buf++ = (char) (0x80 | ((cc >> (cnt * 6)) & 0x3f));
 784                 }
 785             }
 786         }
 787     }
 788
 789     if (buf && (len<n))
 790         *buf = 0;
 791
 792     return len;
 793 }
 794
 795 // ----------------------------------------------------------------------------
 796 // UTF-16
 797 // ----------------------------------------------------------------------------
 798
 799 #ifdef WORDS_BIGENDIAN
 800     #define wxMBConvUTF16straight wxMBConvUTF16BE
 801     #define wxMBConvUTF16swap     wxMBConvUTF16LE
 802 #else
 803     #define wxMBConvUTF16swap     wxMBConvUTF16BE
 804     #define wxMBConvUTF16straight wxMBConvUTF16LE
 805 #endif
 806
 807
 808 #ifdef WC_UTF16
 809
 810 // copy 16bit MB to 16bit String
 811 size_t wxMBConvUTF16straight::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 812 {
 813     size_t len=0;
 814
 815     while (*(wxUint16*)psz && (!buf || len < n))
 816     {
 817         if (buf)
 818             *buf++ = *(wxUint16*)psz;
 819         len++;
 820
 821         psz += sizeof(wxUint16);
 822     }
 823     if (buf && len<n)   *buf=0;
 824
 825     return len;
 826 }
 827
 828
 829 // copy 16bit String to 16bit MB
 830 size_t wxMBConvUTF16straight::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 831 {
 832     size_t len=0;
 833
 834     while (*psz && (!buf || len < n))
 835     {
 836         if (buf)
 837         {
 838             *(wxUint16*)buf = *psz;
 839             buf += sizeof(wxUint16);
 840         }
 841         len += sizeof(wxUint16);
 842         psz++;
 843     }
 844     if (buf && len<=n-sizeof(wxUint16))   *(wxUint16*)buf=0;
 845
 846     return len;
 847 }
 848
 849
 850 // swap 16bit MB to 16bit String
 851 size_t wxMBConvUTF16swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 852 {
 853     size_t len=0;
 854
 855     while (*(wxUint16*)psz && (!buf || len < n))
 856     {
 857         if (buf)
 858         {
 859             ((char *)buf)[0] = psz[1];
 860             ((char *)buf)[1] = psz[0];
 861             buf++;
 862         }
 863         len++;
 864         psz += sizeof(wxUint16);
 865     }
 866     if (buf && len<n)   *buf=0;
 867
 868     return len;
 869 }
 870
 871
 872 // swap 16bit MB to 16bit String
 873 size_t wxMBConvUTF16swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 874 {
 875     size_t len=0;
 876
 877     while (*psz && (!buf || len < n))
 878     {
 879         if (buf)
 880         {
 881             *buf++ = ((char*)psz)[1];
 882             *buf++ = ((char*)psz)[0];
 883         }
 884         len += sizeof(wxUint16);
 885         psz++;
 886     }
 887     if (buf && len<=n-sizeof(wxUint16))   *(wxUint16*)buf=0;
 888
 889     return len;
 890 }
 891
 892
 893 #else // WC_UTF16
 894
 895
 896 // copy 16bit MB to 32bit String
 897 size_t wxMBConvUTF16straight::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 898 {
 899     size_t len=0;
 900
 901     while (*(wxUint16*)psz && (!buf || len < n))
 902     {
 903         wxUint32 cc;
 904         size_t pa=decode_utf16((wxUint16*)psz, cc);
 905         if (pa == (size_t)-1)
 906             return pa;
 907
 908         if (buf)
 909             *buf++ = (wchar_t)cc;
 910         len++;
 911         psz += pa * sizeof(wxUint16);
 912     }
 913     if (buf && len<n)   *buf=0;
 914
 915     return len;
 916 }
 917
 918
 919 // copy 32bit String to 16bit MB
 920 size_t wxMBConvUTF16straight::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 921 {
 922     size_t len=0;
 923
 924     while (*psz && (!buf || len < n))
 925     {
 926         wxUint16 cc[2];
 927         size_t pa=encode_utf16(*psz, cc);
 928
 929         if (pa == (size_t)-1)
 930             return pa;
 931
 932         if (buf)
 933         {
 934             *(wxUint16*)buf = cc[0];
 935             buf += sizeof(wxUint16);
 936             if (pa > 1)
 937             {
 938                 *(wxUint16*)buf = cc[1];
 939                 buf += sizeof(wxUint16);
 940             }
 941         }
 942
 943         len += pa*sizeof(wxUint16);
 944         psz++;
 945     }
 946     if (buf && len<=n-sizeof(wxUint16))   *(wxUint16*)buf=0;
 947
 948     return len;
 949 }
 950
 951
 952 // swap 16bit MB to 32bit String
 953 size_t wxMBConvUTF16swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 954 {
 955     size_t len=0;
 956
 957     while (*(wxUint16*)psz && (!buf || len < n))
 958     {
 959         wxUint32 cc;
 960         char tmp[4];
 961         tmp[0]=psz[1];  tmp[1]=psz[0];
 962         tmp[2]=psz[3];  tmp[3]=psz[2];
 963
 964         size_t pa=decode_utf16((wxUint16*)tmp, cc);
 965         if (pa == (size_t)-1)
 966             return pa;
 967
 968         if (buf)
 969             *buf++ = (wchar_t)cc;
 970
 971         len++;
 972         psz += pa * sizeof(wxUint16);
 973     }
 974     if (buf && len<n)   *buf=0;
 975
 976     return len;
 977 }
 978
 979
 980 // swap 32bit String to 16bit MB
 981 size_t wxMBConvUTF16swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 982 {
 983     size_t len=0;
 984
 985     while (*psz && (!buf || len < n))
 986     {
 987         wxUint16 cc[2];
 988         size_t pa=encode_utf16(*psz, cc);
 989
 990         if (pa == (size_t)-1)
 991             return pa;
 992
 993         if (buf)
 994         {
 995             *buf++ = ((char*)cc)[1];
 996             *buf++ = ((char*)cc)[0];
 997             if (pa > 1)
 998             {
 999                 *buf++ = ((char*)cc)[3];
1000                 *buf++ = ((char*)cc)[2];
1001             }
1002         }
1003
1004         len += pa*sizeof(wxUint16);
1005         psz++;
1006     }
1007     if (buf && len<=n-sizeof(wxUint16))   *(wxUint16*)buf=0;
1008
1009     return len;
1010 }
1011
1012 #endif // WC_UTF16
1013
1014
1015 // ----------------------------------------------------------------------------
1016 // UTF-32
1017 // ----------------------------------------------------------------------------
1018
1019 #ifdef WORDS_BIGENDIAN
1020 #define wxMBConvUTF32straight  wxMBConvUTF32BE
1021 #define wxMBConvUTF32swap      wxMBConvUTF32LE
1022 #else
1023 #define wxMBConvUTF32swap      wxMBConvUTF32BE
1024 #define wxMBConvUTF32straight  wxMBConvUTF32LE
1025 #endif
1026
1027
1028 WXDLLIMPEXP_DATA_BASE(wxMBConvUTF32LE) wxConvUTF32LE;
1029 WXDLLIMPEXP_DATA_BASE(wxMBConvUTF32BE) wxConvUTF32BE;
1030
1031
1032 #ifdef WC_UTF16
1033
1034 // copy 32bit MB to 16bit String
1035 size_t wxMBConvUTF32straight::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1036 {
1037     size_t len=0;
1038
1039     while (*(wxUint32*)psz && (!buf || len < n))
1040     {
1041         wxUint16 cc[2];
1042
1043         size_t pa=encode_utf16(*(wxUint32*)psz, cc);
1044         if (pa == (size_t)-1)
1045             return pa;
1046
1047         if (buf)
1048         {
1049             *buf++ = cc[0];
1050             if (pa > 1)
1051                 *buf++ = cc[1];
1052         }
1053         len += pa;
1054         psz += sizeof(wxUint32);
1055     }
1056     if (buf && len<n)   *buf=0;
1057
1058     return len;
1059 }
1060
1061
1062 // copy 16bit String to 32bit MB
1063 size_t wxMBConvUTF32straight::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1064 {
1065     size_t len=0;
1066
1067     while (*psz && (!buf || len < n))
1068     {
1069         wxUint32 cc;
1070
1071         // cast is ok for WC_UTF16
1072         size_t pa = decode_utf16((const wxUint16 *)psz, cc);
1073         if (pa == (size_t)-1)
1074             return pa;
1075
1076         if (buf)
1077         {
1078             *(wxUint32*)buf = cc;
1079             buf += sizeof(wxUint32);
1080         }
1081         len += sizeof(wxUint32);
1082         psz += pa;
1083     }
1084
1085     if (buf && len<=n-sizeof(wxUint32))
1086         *(wxUint32*)buf=0;
1087
1088     return len;
1089 }
1090
1091
1092
1093 // swap 32bit MB to 16bit String
1094 size_t wxMBConvUTF32swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1095 {
1096     size_t len=0;
1097
1098     while (*(wxUint32*)psz && (!buf || len < n))
1099     {
1100         char tmp[4];
1101         tmp[0] = psz[3];   tmp[1] = psz[2];
1102         tmp[2] = psz[1];   tmp[3] = psz[0];
1103
1104
1105         wxUint16 cc[2];
1106
1107         size_t pa=encode_utf16(*(wxUint32*)tmp, cc);
1108         if (pa == (size_t)-1)
1109             return pa;
1110
1111         if (buf)
1112         {
1113             *buf++ = cc[0];
1114             if (pa > 1)
1115                 *buf++ = cc[1];
1116         }
1117         len += pa;
1118         psz += sizeof(wxUint32);
1119     }
1120
1121     if (buf && len<n)
1122         *buf=0;
1123
1124     return len;
1125 }
1126
1127
1128 // swap 16bit String to 32bit MB
1129 size_t wxMBConvUTF32swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1130 {
1131     size_t len=0;
1132
1133     while (*psz && (!buf || len < n))
1134     {
1135         char cc[4];
1136
1137         // cast is ok for WC_UTF16
1138         size_t pa=decode_utf16((const wxUint16 *)psz, *(wxUint32*)cc);
1139         if (pa == (size_t)-1)
1140             return pa;
1141
1142         if (buf)
1143         {
1144             *buf++ = cc[3];
1145             *buf++ = cc[2];
1146             *buf++ = cc[1];
1147             *buf++ = cc[0];
1148         }
1149         len += sizeof(wxUint32);
1150         psz += pa;
1151     }
1152
1153     if (buf && len<=n-sizeof(wxUint32))
1154         *(wxUint32*)buf=0;
1155
1156     return len;
1157 }
1158
1159 #else // WC_UTF16
1160
1161
1162 // copy 32bit MB to 32bit String
1163 size_t wxMBConvUTF32straight::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1164 {
1165     size_t len=0;
1166
1167     while (*(wxUint32*)psz && (!buf || len < n))
1168     {
1169         if (buf)
1170             *buf++ = (wchar_t)(*(wxUint32*)psz);
1171         len++;
1172         psz += sizeof(wxUint32);
1173     }
1174
1175     if (buf && len<n)
1176         *buf=0;
1177
1178     return len;
1179 }
1180
1181
1182 // copy 32bit String to 32bit MB
1183 size_t wxMBConvUTF32straight::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1184 {
1185     size_t len=0;
1186
1187     while (*psz && (!buf || len < n))
1188     {
1189         if (buf)
1190         {
1191             *(wxUint32*)buf = *psz;
1192             buf += sizeof(wxUint32);
1193         }
1194
1195         len += sizeof(wxUint32);
1196         psz++;
1197     }
1198
1199     if (buf && len<=n-sizeof(wxUint32))
1200         *(wxUint32*)buf=0;
1201
1202     return len;
1203 }
1204
1205
1206 // swap 32bit MB to 32bit String
1207 size_t wxMBConvUTF32swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1208 {
1209     size_t len=0;
1210
1211     while (*(wxUint32*)psz && (!buf || len < n))
1212     {
1213         if (buf)
1214         {
1215             ((char *)buf)[0] = psz[3];
1216             ((char *)buf)[1] = psz[2];
1217             ((char *)buf)[2] = psz[1];
1218             ((char *)buf)[3] = psz[0];
1219             buf++;
1220         }
1221         len++;
1222         psz += sizeof(wxUint32);
1223     }
1224
1225     if (buf && len<n)
1226         *buf=0;
1227
1228     return len;
1229 }
1230
1231
1232 // swap 32bit String to 32bit MB
1233 size_t wxMBConvUTF32swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1234 {
1235     size_t len=0;
1236
1237     while (*psz && (!buf || len < n))
1238     {
1239         if (buf)
1240         {
1241             *buf++ = ((char *)psz)[3];
1242             *buf++ = ((char *)psz)[2];
1243             *buf++ = ((char *)psz)[1];
1244             *buf++ = ((char *)psz)[0];
1245         }
1246         len += sizeof(wxUint32);
1247         psz++;
1248     }
1249
1250     if (buf && len<=n-sizeof(wxUint32))
1251         *(wxUint32*)buf=0;
1252
1253     return len;
1254 }
1255
1256
1257 #endif // WC_UTF16
1258
1259
1260 // ============================================================================
1261 // The classes doing conversion using the iconv_xxx() functions
1262 // ============================================================================
1263
1264 #ifdef HAVE_ICONV
1265
1266 // VS: glibc 2.1.3 is broken in that iconv() conversion to/from UCS4 fails with
1267 //     E2BIG if output buffer is _exactly_ as big as needed. Such case is
1268 //     (unless there's yet another bug in glibc) the only case when iconv()
1269 //     returns with (size_t)-1 (which means error) and says there are 0 bytes
1270 //     left in the input buffer -- when _real_ error occurs,
1271 //     bytes-left-in-input buffer is non-zero. Hence, this alternative test for
1272 //     iconv() failure.
1273 //     [This bug does not appear in glibc 2.2.]
1274 #if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ <= 1
1275 #define ICONV_FAILED(cres, bufLeft) ((cres == (size_t)-1) && \
1276                                      (errno != E2BIG || bufLeft != 0))
1277 #else
1278 #define ICONV_FAILED(cres, bufLeft)  (cres == (size_t)-1)
1279 #endif
1280
1281 #define ICONV_CHAR_CAST(x)  ((ICONV_CONST char **)(x))
1282
1283 #define ICONV_T_INVALID ((iconv_t)-1)
1284
1285 #if SIZEOF_WCHAR_T == 4
1286     #define WC_BSWAP    wxUINT32_SWAP_ALWAYS
1287     #define WC_ENC      wxFONTENCODING_UTF32
1288 #elif SIZEOF_WCHAR_T == 2
1289     #define WC_BSWAP    wxUINT16_SWAP_ALWAYS
1290     #define WC_ENC      wxFONTENCODING_UTF16
1291 #else // sizeof(wchar_t) != 2 nor 4
1292     // does this ever happen?
1293     #error "Unknown sizeof(wchar_t): please report this to wx-dev@lists.wxwindows.org"
1294 #endif
1295
1296 // ----------------------------------------------------------------------------
1297 // wxMBConv_iconv: encapsulates an iconv character set
1298 // ----------------------------------------------------------------------------
1299
1300 class wxMBConv_iconv : public wxMBConv
1301 {
1302 public:
1303     wxMBConv_iconv(const wxChar *name);
1304     virtual ~wxMBConv_iconv();
1305
1306     virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const;
1307     virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const;
1308
1309     bool IsOk() const
1310         { return (m2w != ICONV_T_INVALID) && (w2m != ICONV_T_INVALID); }
1311
1312 protected:
1313     // the iconv handlers used to translate from multibyte to wide char and in
1314     // the other direction
1315     iconv_t m2w,
1316             w2m;
1317 #if wxUSE_THREADS
1318     // guards access to m2w and w2m objects
1319     wxMutex m_iconvMutex;
1320 #endif
1321
1322 private:
1323     // the name (for iconv_open()) of a wide char charset -- if none is
1324     // available on this machine, it will remain NULL
1325     static wxString ms_wcCharsetName;
1326
1327     // true if the wide char encoding we use (i.e. ms_wcCharsetName) has
1328     // different endian-ness than the native one
1329     static bool ms_wcNeedsSwap;
1330 };
1331
1332 // make the constructor available for unit testing
1333 WXDLLIMPEXP_BASE wxMBConv* new_wxMBConv_iconv( const wxChar* name )
1334 {
1335     wxMBConv_iconv* result = new wxMBConv_iconv( name );
1336     if ( !result->IsOk() )
1337     {
1338         delete result;
1339         return 0;
1340     }
1341     return result;
1342 }
1343
1344 wxString wxMBConv_iconv::ms_wcCharsetName;
1345 bool wxMBConv_iconv::ms_wcNeedsSwap = false;
1346
1347 wxMBConv_iconv::wxMBConv_iconv(const wxChar *name)
1348 {
1349     // iconv operates with chars, not wxChars, but luckily it uses only ASCII
1350     // names for the charsets
1351     const wxCharBuffer cname(wxString(name).ToAscii());
1352
1353     // check for charset that represents wchar_t:
1354     if ( ms_wcCharsetName.empty() )
1355     {
1356         wxLogTrace(TRACE_STRCONV, _T("Looking for wide char codeset:"));
1357
1358 #if wxUSE_FONTMAP
1359         const wxChar **names = wxFontMapperBase::GetAllEncodingNames(WC_ENC);
1360 #else // !wxUSE_FONTMAP
1361         static const wxChar *names[] =
1362         {
1363 #if SIZEOF_WCHAR_T == 4
1364             _T("UCS-4"),
1365 #elif SIZEOF_WCHAR_T = 2
1366             _T("UCS-2"),
1367 #endif
1368             NULL
1369         };
1370 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
1371
1372         for ( ; *names && ms_wcCharsetName.empty(); ++names )
1373         {
1374             const wxString nameCS(*names);
1375
1376             // first try charset with explicit bytesex info (e.g. "UCS-4LE"):
1377             wxString nameXE(nameCS);
1378             #ifdef WORDS_BIGENDIAN
1379                 nameXE += _T("BE");
1380             #else // little endian
1381                 nameXE += _T("LE");
1382             #endif
1383
1384             wxLogTrace(TRACE_STRCONV, _T("  trying charset \"%s\""),
1385                        nameXE.c_str());
1386
1387             m2w = iconv_open(nameXE.ToAscii(), cname);
1388             if ( m2w == ICONV_T_INVALID )
1389             {
1390                 // try charset w/o bytesex info (e.g. "UCS4")
1391                 wxLogTrace(TRACE_STRCONV, _T("  trying charset \"%s\""),
1392                            nameCS.c_str());
1393                 m2w = iconv_open(nameCS.ToAscii(), cname);
1394
1395                 // and check for bytesex ourselves:
1396                 if ( m2w != ICONV_T_INVALID )
1397                 {
1398                     char    buf[2], *bufPtr;
1399                     wchar_t wbuf[2], *wbufPtr;
1400                     size_t  insz, outsz;
1401                     size_t  res;
1402
1403                     buf[0] = 'A';
1404                     buf[1] = 0;
1405                     wbuf[0] = 0;
1406                     insz = 2;
1407                     outsz = SIZEOF_WCHAR_T * 2;
1408                     wbufPtr = wbuf;
1409                     bufPtr = buf;
1410
1411                     res = iconv(m2w, ICONV_CHAR_CAST(&bufPtr), &insz,
1412                                 (char**)&wbufPtr, &outsz);
1413
1414                     if (ICONV_FAILED(res, insz))
1415                     {
1416                         wxLogLastError(wxT("iconv"));
1417                         wxLogError(_("Conversion to charset '%s' doesn't work."),
1418                                    nameCS.c_str());
1419                     }
1420                     else // ok, can convert to this encoding, remember it
1421                     {
1422                         ms_wcCharsetName = nameCS;
1423                         ms_wcNeedsSwap = wbuf[0] != (wchar_t)buf[0];
1424                     }
1425                 }
1426             }
1427             else // use charset not requiring byte swapping
1428             {
1429                 ms_wcCharsetName = nameXE;
1430             }
1431         }
1432
1433         wxLogTrace(TRACE_STRCONV,
1434                    wxT("iconv wchar_t charset is \"%s\"%s"),
1435                    ms_wcCharsetName.empty() ? _T("<none>")
1436                                             : ms_wcCharsetName.c_str(),
1437                    ms_wcNeedsSwap ? _T(" (needs swap)")
1438                                   : _T(""));
1439     }
1440     else // we already have ms_wcCharsetName
1441     {
1442         m2w = iconv_open(ms_wcCharsetName.ToAscii(), cname);
1443     }
1444
1445     if ( ms_wcCharsetName.empty() )
1446     {
1447         w2m = ICONV_T_INVALID;
1448     }
1449     else
1450     {
1451         w2m = iconv_open(cname, ms_wcCharsetName.ToAscii());
1452         if ( w2m == ICONV_T_INVALID )
1453         {
1454             wxLogTrace(TRACE_STRCONV,
1455                        wxT("\"%s\" -> \"%s\" works but not the converse!?"),
1456                        ms_wcCharsetName.c_str(), cname.data());
1457         }
1458     }
1459 }
1460
1461 wxMBConv_iconv::~wxMBConv_iconv()
1462 {
1463     if ( m2w != ICONV_T_INVALID )
1464         iconv_close(m2w);
1465     if ( w2m != ICONV_T_INVALID )
1466         iconv_close(w2m);
1467 }
1468
1469 size_t wxMBConv_iconv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
1470 {
1471 #if wxUSE_THREADS
1472     // NB: iconv() is MT-safe, but each thread must use it's own iconv_t handle.
1473     //     Unfortunately there is a couple of global wxCSConv objects such as
1474     //     wxConvLocal that are used all over wx code, so we have to make sure
1475     //     the handle is used by at most one thread at the time. Otherwise
1476     //     only a few wx classes would be safe to use from non-main threads
1477     //     as MB<->WC conversion would fail "randomly".
1478     wxMutexLocker lock(wxConstCast(this, wxMBConv_iconv)->m_iconvMutex);
1479 #endif
1480
1481     size_t inbuf = strlen(psz);
1482     size_t outbuf = n * SIZEOF_WCHAR_T;
1483     size_t res, cres;
1484     // VS: Use these instead of psz, buf because iconv() modifies its arguments:
1485     wchar_t *bufPtr = buf;
1486     const char *pszPtr = psz;
1487
1488     if (buf)
1489     {
1490         // have destination buffer, convert there
1491         cres = iconv(m2w,
1492                      ICONV_CHAR_CAST(&pszPtr), &inbuf,
1493                      (char**)&bufPtr, &outbuf);
1494         res = n - (outbuf / SIZEOF_WCHAR_T);
1495
1496         if (ms_wcNeedsSwap)
1497         {
1498             // convert to native endianness
1499             for ( unsigned i = 0; i < res; i++ )
1500                 buf[n] = WC_BSWAP(buf[i]);
1501         }
1502
1503         // NB: iconv was given only strlen(psz) characters on input, and so
1504         //     it couldn't convert the trailing zero. Let's do it ourselves
1505         //     if there's some room left for it in the output buffer.
1506         if (res < n)
1507             buf[res] = 0;
1508     }
1509     else
1510     {
1511         // no destination buffer... convert using temp buffer
1512         // to calculate destination buffer requirement
1513         wchar_t tbuf[8];
1514         res = 0;
1515         do {
1516             bufPtr = tbuf;
1517             outbuf = 8*SIZEOF_WCHAR_T;
1518
1519             cres = iconv(m2w,
1520                          ICONV_CHAR_CAST(&pszPtr), &inbuf,
1521                          (char**)&bufPtr, &outbuf );
1522
1523             res += 8-(outbuf/SIZEOF_WCHAR_T);
1524         } while ((cres==(size_t)-1) && (errno==E2BIG));
1525     }
1526
1527     if (ICONV_FAILED(cres, inbuf))
1528     {
1529         //VS: it is ok if iconv fails, hence trace only
1530         wxLogTrace(TRACE_STRCONV, wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
1531         return (size_t)-1;
1532     }
1533
1534     return res;
1535 }
1536
1537 size_t wxMBConv_iconv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
1538 {
1539 #if wxUSE_THREADS
1540     // NB: explained in MB2WC
1541     wxMutexLocker lock(wxConstCast(this, wxMBConv_iconv)->m_iconvMutex);
1542 #endif
1543
1544     size_t inlen = wxWcslen(psz);
1545     size_t inbuf = inlen * SIZEOF_WCHAR_T;
1546     size_t outbuf = n;
1547     size_t res, cres;
1548
1549     wchar_t *tmpbuf = 0;
1550
1551     if (ms_wcNeedsSwap)
1552     {
1553         // need to copy to temp buffer to switch endianness
1554         // (doing WC_BSWAP twice on the original buffer won't help, as it
1555         //  could be in read-only memory, or be accessed in some other thread)
1556         tmpbuf = (wchar_t *)malloc(inbuf + SIZEOF_WCHAR_T);
1557         for ( size_t i = 0; i < inlen; i++ )
1558             tmpbuf[n] = WC_BSWAP(psz[i]);
1559         tmpbuf[inlen] = L'\0';
1560         psz = tmpbuf;
1561     }
1562
1563     if (buf)
1564     {
1565         // have destination buffer, convert there
1566         cres = iconv( w2m, ICONV_CHAR_CAST(&psz), &inbuf, &buf, &outbuf );
1567
1568         res = n-outbuf;
1569
1570         // NB: iconv was given only wcslen(psz) characters on input, and so
1571         //     it couldn't convert the trailing zero. Let's do it ourselves
1572         //     if there's some room left for it in the output buffer.
1573         if (res < n)
1574             buf[0] = 0;
1575     }
1576     else
1577     {
1578         // no destination buffer... convert using temp buffer
1579         // to calculate destination buffer requirement
1580         char tbuf[16];
1581         res = 0;
1582         do {
1583             buf = tbuf; outbuf = 16;
1584
1585             cres = iconv( w2m, ICONV_CHAR_CAST(&psz), &inbuf, &buf, &outbuf );
1586
1587             res += 16 - outbuf;
1588         } while ((cres==(size_t)-1) && (errno==E2BIG));
1589     }
1590
1591     if (ms_wcNeedsSwap)
1592     {
1593         free(tmpbuf);
1594     }
1595
1596     if (ICONV_FAILED(cres, inbuf))
1597     {
1598         wxLogTrace(TRACE_STRCONV, wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
1599         return (size_t)-1;
1600     }
1601
1602     return res;
1603 }
1604
1605 #endif // HAVE_ICONV
1606
1607
1608 // ============================================================================
1609 // Win32 conversion classes
1610 // ============================================================================
1611
1612 #ifdef wxHAVE_WIN32_MB2WC
1613
1614 // from utils.cpp
1615 #if wxUSE_FONTMAP
1616 extern WXDLLIMPEXP_BASE long wxCharsetToCodepage(const wxChar *charset);
1617 extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding);
1618 #endif
1619
1620 class wxMBConv_win32 : public wxMBConv
1621 {
1622 public:
1623     wxMBConv_win32()
1624     {
1625         m_CodePage = CP_ACP;
1626     }
1627
1628 #if wxUSE_FONTMAP
1629     wxMBConv_win32(const wxChar* name)
1630     {
1631         m_CodePage = wxCharsetToCodepage(name);
1632     }
1633
1634     wxMBConv_win32(wxFontEncoding encoding)
1635     {
1636         m_CodePage = wxEncodingToCodepage(encoding);
1637     }
1638 #endif
1639
1640     size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const
1641     {
1642         // note that we have to use MB_ERR_INVALID_CHARS flag as it without it
1643         // the behaviour is not compatible with the Unix version (using iconv)
1644         // and break the library itself, e.g. wxTextInputStream::NextChar()
1645         // wouldn't work if reading an incomplete MB char didn't result in an
1646         // error
1647         //
1648         // note however that using MB_ERR_INVALID_CHARS with CP_UTF7 results in
1649         // an error (tested under Windows Server 2003) and apparently it is
1650         // done on purpose, i.e. the function accepts any input in this case
1651         // and although I'd prefer to return error on ill-formed output, our
1652         // own wxMBConvUTF7 doesn't detect errors (e.g. lone "+" which is
1653         // explicitly ill-formed according to RFC 2152) neither so we don't
1654         // even have any fallback here...
1655         //
1656         // Moreover, MB_ERR_INVALID_CHARS is only supported on Win 2K SP4 or
1657         // Win XP or newer and if it is specified on older versions, conversion
1658         // from CP_UTF8 (which can have flags only 0 or MB_ERR_INVALID_CHARS)
1659         // fails. So we can only use the flag on newer Windows versions.
1660         // Additionally, the flag is not supported by UTF7, symbol and CJK
1661         // encodings. See here:
1662         //     http://blogs.msdn.com/michkap/archive/2005/04/19/409566.aspx
1663         //     http://msdn.microsoft.com/library/en-us/intl/unicode_17si.asp
1664         int flags = 0;
1665         if ( m_CodePage != CP_UTF7 && m_CodePage != CP_SYMBOL &&
1666              m_CodePage < 50000 &&
1667              IsAtLeastWin2kSP4() )
1668         {
1669             flags = MB_ERR_INVALID_CHARS;
1670         }
1671         else if ( m_CodePage == CP_UTF8 )
1672         {
1673             // Avoid round-trip in the special case of UTF-8 by using our
1674             // own UTF-8 conversion code:
1675             return wxMBConvUTF8().MB2WC(buf, psz, n);
1676         }
1677
1678         const size_t len = ::MultiByteToWideChar
1679                              (
1680                                 m_CodePage,     // code page
1681                                 flags,          // flags: fall on error
1682                                 psz,            // input string
1683                                 -1,             // its length (NUL-terminated)
1684                                 buf,            // output string
1685                                 buf ? n : 0     // size of output buffer
1686                              );
1687         if ( !len )
1688         {
1689             // function totally failed
1690             return (size_t)-1;
1691         }
1692
1693         // if we were really converting and didn't use MB_ERR_INVALID_CHARS,
1694         // check if we succeeded, by doing a double trip:
1695         if ( !flags && buf )
1696         {
1697             wxCharBuffer mbBuf(n);
1698             if ( ::WideCharToMultiByte
1699                    (
1700                       m_CodePage,
1701                       0,
1702                       buf,
1703                       -1,
1704                       mbBuf.data(),
1705                       n,
1706                       NULL,
1707                       NULL
1708                    ) == 0 ||
1709                   strcmp(mbBuf, psz) != 0 )
1710             {
1711                 // we didn't obtain the same thing we started from, hence
1712                 // the conversion was lossy and we consider that it failed
1713                 return (size_t)-1;
1714             }
1715         }
1716
1717         // note that it returns count of written chars for buf != NULL and size
1718         // of the needed buffer for buf == NULL so in either case the length of
1719         // the string (which never includes the terminating NUL) is one less
1720         return len - 1;
1721     }
1722
1723     size_t WC2MB(char *buf, const wchar_t *pwz, size_t n) const
1724     {
1725         /*
1726             we have a problem here: by default, WideCharToMultiByte() may
1727             replace characters unrepresentable in the target code page with bad
1728             quality approximations such as turning "1/2" symbol (U+00BD) into
1729             "1" for the code pages which don't have it and we, obviously, want
1730             to avoid this at any price
1731
1732             the trouble is that this function does it _silently_, i.e. it won't
1733             even tell us whether it did or not... Win98/2000 and higher provide
1734             WC_NO_BEST_FIT_CHARS but it doesn't work for the older systems and
1735             we have to resort to a round trip, i.e. check that converting back
1736             results in the same string -- this is, of course, expensive but
1737             otherwise we simply can't be sure to not garble the data.
1738          */
1739
1740         // determine if we can rely on WC_NO_BEST_FIT_CHARS: according to MSDN
1741         // it doesn't work with CJK encodings (which we test for rather roughly
1742         // here...) nor with UTF-7/8 nor, of course, with Windows versions not
1743         // supporting it
1744         BOOL usedDef wxDUMMY_INITIALIZE(false);
1745         BOOL *pUsedDef;
1746         int flags;
1747         if ( CanUseNoBestFit() && m_CodePage < 50000 )
1748         {
1749             // it's our lucky day
1750             flags = WC_NO_BEST_FIT_CHARS;
1751             pUsedDef = &usedDef;
1752         }
1753         else // old system or unsupported encoding
1754         {
1755             flags = 0;
1756             pUsedDef = NULL;
1757         }
1758
1759         const size_t len = ::WideCharToMultiByte
1760                              (
1761                                 m_CodePage,     // code page
1762                                 flags,          // either none or no best fit
1763                                 pwz,            // input string
1764                                 -1,             // it is (wide) NUL-terminated
1765                                 buf,            // output buffer
1766                                 buf ? n : 0,    // and its size
1767                                 NULL,           // default "replacement" char
1768                                 pUsedDef        // [out] was it used?
1769                              );
1770
1771         if ( !len )
1772         {
1773             // function totally failed
1774             return (size_t)-1;
1775         }
1776
1777         // if we were really converting, check if we succeeded
1778         if ( buf )
1779         {
1780             if ( flags )
1781             {
1782                 // check if the conversion failed, i.e. if any replacements
1783                 // were done
1784                 if ( usedDef )
1785                     return (size_t)-1;
1786             }
1787             else // we must resort to double tripping...
1788             {
1789                 wxWCharBuffer wcBuf(n);
1790                 if ( MB2WC(wcBuf.data(), buf, n) == (size_t)-1 ||
1791                         wcscmp(wcBuf, pwz) != 0 )
1792                 {
1793                     // we didn't obtain the same thing we started from, hence
1794                     // the conversion was lossy and we consider that it failed
1795                     return (size_t)-1;
1796                 }
1797             }
1798         }
1799
1800         // see the comment above for the reason of "len - 1"
1801         return len - 1;
1802     }
1803
1804     bool IsOk() const { return m_CodePage != -1; }
1805
1806 private:
1807     static bool CanUseNoBestFit()
1808     {
1809         static int s_isWin98Or2k = -1;
1810
1811         if ( s_isWin98Or2k == -1 )
1812         {
1813             int verMaj, verMin;
1814             switch ( wxGetOsVersion(&verMaj, &verMin) )
1815             {
1816                 case wxWIN95:
1817                     s_isWin98Or2k = verMaj >= 4 && verMin >= 10;
1818                     break;
1819
1820                 case wxWINDOWS_NT:
1821                     s_isWin98Or2k = verMaj >= 5;
1822                     break;
1823
1824                 default:
1825                     // unknown, be conseravtive by default
1826                     s_isWin98Or2k = 0;
1827             }
1828
1829             wxASSERT_MSG( s_isWin98Or2k != -1, _T("should be set above") );
1830         }
1831
1832         return s_isWin98Or2k == 1;
1833     }
1834
1835     static bool IsAtLeastWin2kSP4()
1836     {
1837 #ifdef __WXWINCE__
1838         return false;
1839 #else
1840         static int s_isAtLeastWin2kSP4 = -1;
1841
1842         if ( s_isAtLeastWin2kSP4 == -1 )
1843         {
1844             OSVERSIONINFOEX ver;
1845
1846             memset(&ver, 0, sizeof(ver));
1847             ver.dwOSVersionInfoSize = sizeof(ver);
1848             GetVersionEx((OSVERSIONINFO*)&ver);
1849
1850             s_isAtLeastWin2kSP4 =
1851               ((ver.dwMajorVersion > 5) || // Vista+
1852                (ver.dwMajorVersion == 5 && ver.dwMinorVersion > 0) || // XP/2003
1853                (ver.dwMajorVersion == 5 && ver.dwMinorVersion == 0 &&
1854                ver.wServicePackMajor >= 4)) // 2000 SP4+
1855               ? 1 : 0;
1856         }
1857
1858         return s_isAtLeastWin2kSP4 == 1;
1859 #endif
1860     }
1861
1862     long m_CodePage;
1863 };
1864
1865 #endif // wxHAVE_WIN32_MB2WC
1866
1867 // ============================================================================
1868 // Cocoa conversion classes
1869 // ============================================================================
1870
1871 #if defined(__WXCOCOA__)
1872
1873 // RN:  There is no UTF-32 support in either Core Foundation or
1874 // Cocoa.  Strangely enough, internally Core Foundation uses
1875 // UTF 32 internally quite a bit - its just not public (yet).
1876
1877 #include <CoreFoundation/CFString.h>
1878 #include <CoreFoundation/CFStringEncodingExt.h>
1879
1880 CFStringEncoding wxCFStringEncFromFontEnc(wxFontEncoding encoding)
1881 {
1882     CFStringEncoding enc = kCFStringEncodingInvalidId ;
1883     if ( encoding == wxFONTENCODING_DEFAULT )
1884     {
1885         enc = CFStringGetSystemEncoding();
1886     }
1887     else switch( encoding)
1888     {
1889         case wxFONTENCODING_ISO8859_1 :
1890             enc = kCFStringEncodingISOLatin1 ;
1891             break ;
1892         case wxFONTENCODING_ISO8859_2 :
1893             enc = kCFStringEncodingISOLatin2;
1894             break ;
1895         case wxFONTENCODING_ISO8859_3 :
1896             enc = kCFStringEncodingISOLatin3 ;
1897             break ;
1898         case wxFONTENCODING_ISO8859_4 :
1899             enc = kCFStringEncodingISOLatin4;
1900             break ;
1901         case wxFONTENCODING_ISO8859_5 :
1902             enc = kCFStringEncodingISOLatinCyrillic;
1903             break ;
1904         case wxFONTENCODING_ISO8859_6 :
1905             enc = kCFStringEncodingISOLatinArabic;
1906             break ;
1907         case wxFONTENCODING_ISO8859_7 :
1908             enc = kCFStringEncodingISOLatinGreek;
1909             break ;
1910         case wxFONTENCODING_ISO8859_8 :
1911             enc = kCFStringEncodingISOLatinHebrew;
1912             break ;
1913         case wxFONTENCODING_ISO8859_9 :
1914             enc = kCFStringEncodingISOLatin5;
1915             break ;
1916         case wxFONTENCODING_ISO8859_10 :
1917             enc = kCFStringEncodingISOLatin6;
1918             break ;
1919         case wxFONTENCODING_ISO8859_11 :
1920             enc = kCFStringEncodingISOLatinThai;
1921             break ;
1922         case wxFONTENCODING_ISO8859_13 :
1923             enc = kCFStringEncodingISOLatin7;
1924             break ;
1925         case wxFONTENCODING_ISO8859_14 :
1926             enc = kCFStringEncodingISOLatin8;
1927             break ;
1928         case wxFONTENCODING_ISO8859_15 :
1929             enc = kCFStringEncodingISOLatin9;
1930             break ;
1931
1932         case wxFONTENCODING_KOI8 :
1933             enc = kCFStringEncodingKOI8_R;
1934             break ;
1935         case wxFONTENCODING_ALTERNATIVE : // MS-DOS CP866
1936             enc = kCFStringEncodingDOSRussian;
1937             break ;
1938
1939 //      case wxFONTENCODING_BULGARIAN :
1940 //          enc = ;
1941 //          break ;
1942
1943         case wxFONTENCODING_CP437 :
1944             enc =kCFStringEncodingDOSLatinUS ;
1945             break ;
1946         case wxFONTENCODING_CP850 :
1947             enc = kCFStringEncodingDOSLatin1;
1948             break ;
1949         case wxFONTENCODING_CP852 :
1950             enc = kCFStringEncodingDOSLatin2;
1951             break ;
1952         case wxFONTENCODING_CP855 :
1953             enc = kCFStringEncodingDOSCyrillic;
1954             break ;
1955         case wxFONTENCODING_CP866 :
1956             enc =kCFStringEncodingDOSRussian ;
1957             break ;
1958         case wxFONTENCODING_CP874 :
1959             enc = kCFStringEncodingDOSThai;
1960             break ;
1961         case wxFONTENCODING_CP932 :
1962             enc = kCFStringEncodingDOSJapanese;
1963             break ;
1964         case wxFONTENCODING_CP936 :
1965             enc =kCFStringEncodingDOSChineseSimplif ;
1966             break ;
1967         case wxFONTENCODING_CP949 :
1968             enc = kCFStringEncodingDOSKorean;
1969             break ;
1970         case wxFONTENCODING_CP950 :
1971             enc = kCFStringEncodingDOSChineseTrad;
1972             break ;
1973         case wxFONTENCODING_CP1250 :
1974             enc = kCFStringEncodingWindowsLatin2;
1975             break ;
1976         case wxFONTENCODING_CP1251 :
1977             enc =kCFStringEncodingWindowsCyrillic ;
1978             break ;
1979         case wxFONTENCODING_CP1252 :
1980             enc =kCFStringEncodingWindowsLatin1 ;
1981             break ;
1982         case wxFONTENCODING_CP1253 :
1983             enc = kCFStringEncodingWindowsGreek;
1984             break ;
1985         case wxFONTENCODING_CP1254 :
1986             enc = kCFStringEncodingWindowsLatin5;
1987             break ;
1988         case wxFONTENCODING_CP1255 :
1989             enc =kCFStringEncodingWindowsHebrew ;
1990             break ;
1991         case wxFONTENCODING_CP1256 :
1992             enc =kCFStringEncodingWindowsArabic ;
1993             break ;
1994         case wxFONTENCODING_CP1257 :
1995             enc = kCFStringEncodingWindowsBalticRim;
1996             break ;
1997 //   This only really encodes to UTF7 (if that) evidently
1998 //        case wxFONTENCODING_UTF7 :
1999 //            enc = kCFStringEncodingNonLossyASCII ;
2000 //            break ;
2001         case wxFONTENCODING_UTF8 :
2002             enc = kCFStringEncodingUTF8 ;
2003             break ;
2004         case wxFONTENCODING_EUC_JP :
2005             enc = kCFStringEncodingEUC_JP;
2006             break ;
2007         case wxFONTENCODING_UTF16 :
2008             enc = kCFStringEncodingUnicode ;
2009             break ;
2010         case wxFONTENCODING_MACROMAN :
2011             enc = kCFStringEncodingMacRoman ;
2012             break ;
2013         case wxFONTENCODING_MACJAPANESE :
2014             enc = kCFStringEncodingMacJapanese ;
2015             break ;
2016         case wxFONTENCODING_MACCHINESETRAD :
2017             enc = kCFStringEncodingMacChineseTrad ;
2018             break ;
2019         case wxFONTENCODING_MACKOREAN :
2020             enc = kCFStringEncodingMacKorean ;
2021             break ;
2022         case wxFONTENCODING_MACARABIC :
2023             enc = kCFStringEncodingMacArabic ;
2024             break ;
2025         case wxFONTENCODING_MACHEBREW :
2026             enc = kCFStringEncodingMacHebrew ;
2027             break ;
2028         case wxFONTENCODING_MACGREEK :
2029             enc = kCFStringEncodingMacGreek ;
2030             break ;
2031         case wxFONTENCODING_MACCYRILLIC :
2032             enc = kCFStringEncodingMacCyrillic ;
2033             break ;
2034         case wxFONTENCODING_MACDEVANAGARI :
2035             enc = kCFStringEncodingMacDevanagari ;
2036             break ;
2037         case wxFONTENCODING_MACGURMUKHI :
2038             enc = kCFStringEncodingMacGurmukhi ;
2039             break ;
2040         case wxFONTENCODING_MACGUJARATI :
2041             enc = kCFStringEncodingMacGujarati ;
2042             break ;
2043         case wxFONTENCODING_MACORIYA :
2044             enc = kCFStringEncodingMacOriya ;
2045             break ;
2046         case wxFONTENCODING_MACBENGALI :
2047             enc = kCFStringEncodingMacBengali ;
2048             break ;
2049         case wxFONTENCODING_MACTAMIL :
2050             enc = kCFStringEncodingMacTamil ;
2051             break ;
2052         case wxFONTENCODING_MACTELUGU :
2053             enc = kCFStringEncodingMacTelugu ;
2054             break ;
2055         case wxFONTENCODING_MACKANNADA :
2056             enc = kCFStringEncodingMacKannada ;
2057             break ;
2058         case wxFONTENCODING_MACMALAJALAM :
2059             enc = kCFStringEncodingMacMalayalam ;
2060             break ;
2061         case wxFONTENCODING_MACSINHALESE :
2062             enc = kCFStringEncodingMacSinhalese ;
2063             break ;
2064         case wxFONTENCODING_MACBURMESE :
2065             enc = kCFStringEncodingMacBurmese ;
2066             break ;
2067         case wxFONTENCODING_MACKHMER :
2068             enc = kCFStringEncodingMacKhmer ;
2069             break ;
2070         case wxFONTENCODING_MACTHAI :
2071             enc = kCFStringEncodingMacThai ;
2072             break ;
2073         case wxFONTENCODING_MACLAOTIAN :
2074             enc = kCFStringEncodingMacLaotian ;
2075             break ;
2076         case wxFONTENCODING_MACGEORGIAN :
2077             enc = kCFStringEncodingMacGeorgian ;
2078             break ;
2079         case wxFONTENCODING_MACARMENIAN :
2080             enc = kCFStringEncodingMacArmenian ;
2081             break ;
2082         case wxFONTENCODING_MACCHINESESIMP :
2083             enc = kCFStringEncodingMacChineseSimp ;
2084             break ;
2085         case wxFONTENCODING_MACTIBETAN :
2086             enc = kCFStringEncodingMacTibetan ;
2087             break ;
2088         case wxFONTENCODING_MACMONGOLIAN :
2089             enc = kCFStringEncodingMacMongolian ;
2090             break ;
2091         case wxFONTENCODING_MACETHIOPIC :
2092             enc = kCFStringEncodingMacEthiopic ;
2093             break ;
2094         case wxFONTENCODING_MACCENTRALEUR :
2095             enc = kCFStringEncodingMacCentralEurRoman ;
2096             break ;
2097         case wxFONTENCODING_MACVIATNAMESE :
2098             enc = kCFStringEncodingMacVietnamese ;
2099             break ;
2100         case wxFONTENCODING_MACARABICEXT :
2101             enc = kCFStringEncodingMacExtArabic ;
2102             break ;
2103         case wxFONTENCODING_MACSYMBOL :
2104             enc = kCFStringEncodingMacSymbol ;
2105             break ;
2106         case wxFONTENCODING_MACDINGBATS :
2107             enc = kCFStringEncodingMacDingbats ;
2108             break ;
2109         case wxFONTENCODING_MACTURKISH :
2110             enc = kCFStringEncodingMacTurkish ;
2111             break ;
2112         case wxFONTENCODING_MACCROATIAN :
2113             enc = kCFStringEncodingMacCroatian ;
2114             break ;
2115         case wxFONTENCODING_MACICELANDIC :
2116             enc = kCFStringEncodingMacIcelandic ;
2117             break ;
2118         case wxFONTENCODING_MACROMANIAN :
2119             enc = kCFStringEncodingMacRomanian ;
2120             break ;
2121         case wxFONTENCODING_MACCELTIC :
2122             enc = kCFStringEncodingMacCeltic ;
2123             break ;
2124         case wxFONTENCODING_MACGAELIC :
2125             enc = kCFStringEncodingMacGaelic ;
2126             break ;
2127 //      case wxFONTENCODING_MACKEYBOARD :
2128 //          enc = kCFStringEncodingMacKeyboardGlyphs ;
2129 //          break ;
2130         default :
2131             // because gcc is picky
2132             break ;
2133     } ;
2134     return enc ;
2135 }
2136
2137 class wxMBConv_cocoa : public wxMBConv
2138 {
2139 public:
2140     wxMBConv_cocoa()
2141     {
2142         Init(CFStringGetSystemEncoding()) ;
2143     }
2144
2145 #if wxUSE_FONTMAP
2146     wxMBConv_cocoa(const wxChar* name)
2147     {
2148         Init( wxCFStringEncFromFontEnc(wxFontMapperBase::Get()->CharsetToEncoding(name, false) ) ) ;
2149     }
2150 #endif
2151
2152     wxMBConv_cocoa(wxFontEncoding encoding)
2153     {
2154         Init( wxCFStringEncFromFontEnc(encoding) );
2155     }
2156
2157     ~wxMBConv_cocoa()
2158     {
2159     }
2160
2161     void Init( CFStringEncoding encoding)
2162     {
2163         m_encoding = encoding ;
2164     }
2165
2166     size_t MB2WC(wchar_t * szOut, const char * szUnConv, size_t nOutSize) const
2167     {
2168         wxASSERT(szUnConv);
2169
2170         CFStringRef theString = CFStringCreateWithBytes (
2171                                                 NULL, //the allocator
2172                                                 (const UInt8*)szUnConv,
2173                                                 strlen(szUnConv),
2174                                                 m_encoding,
2175                                                 false //no BOM/external representation
2176                                                 );
2177
2178         wxASSERT(theString);
2179
2180         size_t nOutLength = CFStringGetLength(theString);
2181
2182         if (szOut == NULL)
2183         {
2184             CFRelease(theString);
2185             return nOutLength;
2186         }
2187
2188         CFRange theRange = { 0, nOutSize };
2189
2190 #if SIZEOF_WCHAR_T == 4
2191         UniChar* szUniCharBuffer = new UniChar[nOutSize];
2192 #endif
2193
2194         CFStringGetCharacters(theString, theRange, szUniCharBuffer);
2195
2196         CFRelease(theString);
2197
2198         szUniCharBuffer[nOutLength] = '\0' ;
2199
2200 #if SIZEOF_WCHAR_T == 4
2201         wxMBConvUTF16 converter ;
2202         converter.MB2WC(szOut, (const char*)szUniCharBuffer , nOutSize ) ;
2203         delete[] szUniCharBuffer;
2204 #endif
2205
2206         return nOutLength;
2207     }
2208
2209     size_t WC2MB(char *szOut, const wchar_t *szUnConv, size_t nOutSize) const
2210     {
2211         wxASSERT(szUnConv);
2212
2213         size_t nRealOutSize;
2214         size_t nBufSize = wxWcslen(szUnConv);
2215         UniChar* szUniBuffer = (UniChar*) szUnConv;
2216
2217 #if SIZEOF_WCHAR_T == 4
2218         wxMBConvUTF16 converter ;
2219         nBufSize = converter.WC2MB( NULL , szUnConv , 0 );
2220         szUniBuffer = new UniChar[ (nBufSize / sizeof(UniChar)) + 1] ;
2221         converter.WC2MB( (char*) szUniBuffer , szUnConv, nBufSize + sizeof(UniChar)) ;
2222         nBufSize /= sizeof(UniChar);
2223 #endif
2224
2225         CFStringRef theString = CFStringCreateWithCharactersNoCopy(
2226                                 NULL, //allocator
2227                                 szUniBuffer,
2228                                 nBufSize,
2229                                 kCFAllocatorNull //deallocator - we want to deallocate it ourselves
2230                             );
2231
2232         wxASSERT(theString);
2233
2234         //Note that CER puts a BOM when converting to unicode
2235         //so we  check and use getchars instead in that case
2236         if (m_encoding == kCFStringEncodingUnicode)
2237         {
2238             if (szOut != NULL)
2239                 CFStringGetCharacters(theString, CFRangeMake(0, nOutSize - 1), (UniChar*) szOut);
2240
2241             nRealOutSize = CFStringGetLength(theString) + 1;
2242         }
2243         else
2244         {
2245             CFStringGetBytes(
2246                 theString,
2247                 CFRangeMake(0, CFStringGetLength(theString)),
2248                 m_encoding,
2249                 0, //what to put in characters that can't be converted -
2250                     //0 tells CFString to return NULL if it meets such a character
2251                 false, //not an external representation
2252                 (UInt8*) szOut,
2253                 nOutSize,
2254                 (CFIndex*) &nRealOutSize
2255                         );
2256         }
2257
2258         CFRelease(theString);
2259
2260 #if SIZEOF_WCHAR_T == 4
2261         delete[] szUniBuffer;
2262 #endif
2263
2264         return  nRealOutSize - 1;
2265     }
2266
2267     bool IsOk() const
2268     {
2269         return m_encoding != kCFStringEncodingInvalidId &&
2270               CFStringIsEncodingAvailable(m_encoding);
2271     }
2272
2273 private:
2274     CFStringEncoding m_encoding ;
2275 };
2276
2277 #endif // defined(__WXCOCOA__)
2278
2279 // ============================================================================
2280 // Mac conversion classes
2281 // ============================================================================
2282
2283 #if defined(__WXMAC__) && defined(TARGET_CARBON)
2284
2285 class wxMBConv_mac : public wxMBConv
2286 {
2287 public:
2288     wxMBConv_mac()
2289     {
2290         Init(CFStringGetSystemEncoding()) ;
2291     }
2292
2293 #if wxUSE_FONTMAP
2294     wxMBConv_mac(const wxChar* name)
2295     {
2296         Init( wxMacGetSystemEncFromFontEnc(wxFontMapperBase::Get()->CharsetToEncoding(name, false) ) ) ;
2297     }
2298 #endif
2299
2300     wxMBConv_mac(wxFontEncoding encoding)
2301     {
2302         Init( wxMacGetSystemEncFromFontEnc(encoding) );
2303     }
2304
2305     ~wxMBConv_mac()
2306     {
2307         OSStatus status = noErr ;
2308         status = TECDisposeConverter(m_MB2WC_converter);
2309         status = TECDisposeConverter(m_WC2MB_converter);
2310     }
2311
2312
2313     void Init( TextEncodingBase encoding)
2314     {
2315         OSStatus status = noErr ;
2316         m_char_encoding = encoding ;
2317         m_unicode_encoding = CreateTextEncoding(kTextEncodingUnicodeDefault,0,kUnicode16BitFormat) ;
2318
2319         status = TECCreateConverter(&m_MB2WC_converter,
2320                                     m_char_encoding,
2321                                     m_unicode_encoding);
2322         status = TECCreateConverter(&m_WC2MB_converter,
2323                                     m_unicode_encoding,
2324                                     m_char_encoding);
2325     }
2326
2327     size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const
2328     {
2329         OSStatus status = noErr ;
2330         ByteCount byteOutLen ;
2331         ByteCount byteInLen = strlen(psz) ;
2332         wchar_t *tbuf = NULL ;
2333         UniChar* ubuf = NULL ;
2334         size_t res = 0 ;
2335
2336         if (buf == NULL)
2337         {
2338             //apple specs say at least 32
2339             n = wxMax( 32 , byteInLen ) ;
2340             tbuf = (wchar_t*) malloc( n * SIZEOF_WCHAR_T) ;
2341         }
2342         ByteCount byteBufferLen = n * sizeof( UniChar ) ;
2343 #if SIZEOF_WCHAR_T == 4
2344         ubuf = (UniChar*) malloc( byteBufferLen + 2 ) ;
2345 #else
2346         ubuf = (UniChar*) (buf ? buf : tbuf) ;
2347 #endif
2348         status = TECConvertText(m_MB2WC_converter, (ConstTextPtr) psz , byteInLen, &byteInLen,
2349           (TextPtr) ubuf , byteBufferLen, &byteOutLen);
2350 #if SIZEOF_WCHAR_T == 4
2351         // we have to terminate here, because n might be larger for the trailing zero, and if UniChar
2352         // is not properly terminated we get random characters at the end
2353         ubuf[byteOutLen / sizeof( UniChar ) ] = 0 ;
2354         wxMBConvUTF16 converter ;
2355         res = converter.MB2WC( (buf ? buf : tbuf) , (const char*)ubuf , n ) ;
2356         free( ubuf ) ;
2357 #else
2358         res = byteOutLen / sizeof( UniChar ) ;
2359 #endif
2360         if ( buf == NULL )
2361              free(tbuf) ;
2362
2363         if ( buf  && res < n)
2364             buf[res] = 0;
2365
2366         return res ;
2367     }
2368
2369     size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const
2370     {
2371         OSStatus status = noErr ;
2372         ByteCount byteOutLen ;
2373         ByteCount byteInLen = wxWcslen(psz) * SIZEOF_WCHAR_T ;
2374
2375         char *tbuf = NULL ;
2376
2377         if (buf == NULL)
2378         {
2379             //apple specs say at least 32
2380             n = wxMax( 32 , ((byteInLen / SIZEOF_WCHAR_T) * 8) + SIZEOF_WCHAR_T );
2381             tbuf = (char*) malloc( n ) ;
2382         }
2383
2384         ByteCount byteBufferLen = n ;
2385         UniChar* ubuf = NULL ;
2386 #if SIZEOF_WCHAR_T == 4
2387         wxMBConvUTF16 converter ;
2388         size_t unicharlen = converter.WC2MB( NULL , psz , 0 ) ;
2389         byteInLen = unicharlen ;
2390         ubuf = (UniChar*) malloc( byteInLen + 2 ) ;
2391         converter.WC2MB( (char*) ubuf , psz, unicharlen + 2 ) ;
2392 #else
2393         ubuf = (UniChar*) psz ;
2394 #endif
2395         status = TECConvertText(m_WC2MB_converter, (ConstTextPtr) ubuf , byteInLen, &byteInLen,
2396             (TextPtr) (buf ? buf : tbuf) , byteBufferLen, &byteOutLen);
2397 #if SIZEOF_WCHAR_T == 4
2398         free( ubuf ) ;
2399 #endif
2400         if ( buf == NULL )
2401             free(tbuf) ;
2402
2403         size_t res = byteOutLen ;
2404         if ( buf  && res < n)
2405         {
2406             buf[res] = 0;
2407
2408             //we need to double-trip to verify it didn't insert any ? in place
2409             //of bogus characters
2410             wxWCharBuffer wcBuf(n);
2411             size_t pszlen = wxWcslen(psz);
2412             if ( MB2WC(wcBuf.data(), buf, n) == (size_t)-1 ||
2413                         wxWcslen(wcBuf) != pszlen ||
2414                         memcmp(wcBuf, psz, pszlen * sizeof(wchar_t)) != 0 )
2415             {
2416                 // we didn't obtain the same thing we started from, hence
2417                 // the conversion was lossy and we consider that it failed
2418                 return (size_t)-1;
2419             }
2420         }
2421
2422         return res ;
2423     }
2424
2425     bool IsOk() const
2426         { return m_MB2WC_converter !=  NULL && m_WC2MB_converter != NULL  ; }
2427
2428 private:
2429     TECObjectRef m_MB2WC_converter ;
2430     TECObjectRef m_WC2MB_converter ;
2431
2432     TextEncodingBase m_char_encoding ;
2433     TextEncodingBase m_unicode_encoding ;
2434 };
2435
2436 #endif // defined(__WXMAC__) && defined(TARGET_CARBON)
2437
2438 // ============================================================================
2439 // wxEncodingConverter based conversion classes
2440 // ============================================================================
2441
2442 #if wxUSE_FONTMAP
2443
2444 class wxMBConv_wxwin : public wxMBConv
2445 {
2446 private:
2447     void Init()
2448     {
2449         m_ok = m2w.Init(m_enc, wxFONTENCODING_UNICODE) &&
2450                w2m.Init(wxFONTENCODING_UNICODE, m_enc);
2451     }
2452
2453 public:
2454     // temporarily just use wxEncodingConverter stuff,
2455     // so that it works while a better implementation is built
2456     wxMBConv_wxwin(const wxChar* name)
2457     {
2458         if (name)
2459             m_enc = wxFontMapperBase::Get()->CharsetToEncoding(name, false);
2460         else
2461             m_enc = wxFONTENCODING_SYSTEM;
2462
2463         Init();
2464     }
2465
2466     wxMBConv_wxwin(wxFontEncoding enc)
2467     {
2468         m_enc = enc;
2469
2470         Init();
2471     }
2472
2473     size_t MB2WC(wchar_t *buf, const char *psz, size_t WXUNUSED(n)) const
2474     {
2475         size_t inbuf = strlen(psz);
2476         if (buf)
2477         {
2478             if (!m2w.Convert(psz,buf))
2479                 return (size_t)-1;
2480         }
2481         return inbuf;
2482     }
2483
2484     size_t WC2MB(char *buf, const wchar_t *psz, size_t WXUNUSED(n)) const
2485     {
2486         const size_t inbuf = wxWcslen(psz);
2487         if (buf)
2488         {
2489             if (!w2m.Convert(psz,buf))
2490                 return (size_t)-1;
2491         }
2492
2493         return inbuf;
2494     }
2495
2496     bool IsOk() const { return m_ok; }
2497
2498 public:
2499     wxFontEncoding m_enc;
2500     wxEncodingConverter m2w, w2m;
2501
2502     // were we initialized successfully?
2503     bool m_ok;
2504
2505     DECLARE_NO_COPY_CLASS(wxMBConv_wxwin)
2506 };
2507
2508 // make the constructors available for unit testing
2509 WXDLLIMPEXP_BASE wxMBConv* new_wxMBConv_wxwin( const wxChar* name )
2510 {
2511     wxMBConv_wxwin* result = new wxMBConv_wxwin( name );
2512     if ( !result->IsOk() )
2513     {
2514         delete result;
2515         return 0;
2516     }
2517     return result;
2518 }
2519
2520 #endif // wxUSE_FONTMAP
2521
2522 // ============================================================================
2523 // wxCSConv implementation
2524 // ============================================================================
2525
2526 void wxCSConv::Init()
2527 {
2528     m_name = NULL;
2529     m_convReal =  NULL;
2530     m_deferred = true;
2531 }
2532
2533 wxCSConv::wxCSConv(const wxChar *charset)
2534 {
2535     Init();
2536
2537     if ( charset )
2538     {
2539         SetName(charset);
2540     }
2541
2542 #if wxUSE_FONTMAP
2543     m_encoding = wxFontMapperBase::GetEncodingFromName(charset);
2544 #else
2545     m_encoding = wxFONTENCODING_SYSTEM;
2546 #endif
2547 }
2548
2549 wxCSConv::wxCSConv(wxFontEncoding encoding)
2550 {
2551     if ( encoding == wxFONTENCODING_MAX || encoding == wxFONTENCODING_DEFAULT )
2552     {
2553         wxFAIL_MSG( _T("invalid encoding value in wxCSConv ctor") );
2554
2555         encoding = wxFONTENCODING_SYSTEM;
2556     }
2557
2558     Init();
2559
2560     m_encoding = encoding;
2561 }
2562
2563 wxCSConv::~wxCSConv()
2564 {
2565     Clear();
2566 }
2567
2568 wxCSConv::wxCSConv(const wxCSConv& conv)
2569         : wxMBConv()
2570 {
2571     Init();
2572
2573     SetName(conv.m_name);
2574     m_encoding = conv.m_encoding;
2575 }
2576
2577 wxCSConv& wxCSConv::operator=(const wxCSConv& conv)
2578 {
2579     Clear();
2580
2581     SetName(conv.m_name);
2582     m_encoding = conv.m_encoding;
2583
2584     return *this;
2585 }
2586
2587 void wxCSConv::Clear()
2588 {
2589     free(m_name);
2590     delete m_convReal;
2591
2592     m_name = NULL;
2593     m_convReal = NULL;
2594 }
2595
2596 void wxCSConv::SetName(const wxChar *charset)
2597 {
2598     if (charset)
2599     {
2600         m_name = wxStrdup(charset);
2601         m_deferred = true;
2602     }
2603 }
2604
2605 #if wxUSE_FONTMAP
2606 #include "wx/hashmap.h"
2607
2608 WX_DECLARE_HASH_MAP( wxFontEncoding, wxString, wxIntegerHash, wxIntegerEqual,
2609                      wxEncodingNameCache );
2610
2611 static wxEncodingNameCache gs_nameCache;
2612 #endif
2613
2614 wxMBConv *wxCSConv::DoCreate() const
2615 {
2616 #if wxUSE_FONTMAP
2617     wxLogTrace(TRACE_STRCONV,
2618                wxT("creating conversion for %s"),
2619                (m_name ? m_name
2620                        : wxFontMapperBase::GetEncodingName(m_encoding).c_str()));
2621 #endif // wxUSE_FONTMAP
2622
2623     // check for the special case of ASCII or ISO8859-1 charset: as we have
2624     // special knowledge of it anyhow, we don't need to create a special
2625     // conversion object
2626     if ( m_encoding == wxFONTENCODING_ISO8859_1 ||
2627             m_encoding == wxFONTENCODING_DEFAULT )
2628     {
2629         // don't convert at all
2630         return NULL;
2631     }
2632
2633     // we trust OS to do conversion better than we can so try external
2634     // conversion methods first
2635     //
2636     // the full order is:
2637     //      1. OS conversion (iconv() under Unix or Win32 API)
2638     //      2. hard coded conversions for UTF
2639     //      3. wxEncodingConverter as fall back
2640
2641     // step (1)
2642 #ifdef HAVE_ICONV
2643 #if !wxUSE_FONTMAP
2644     if ( m_name )
2645 #endif // !wxUSE_FONTMAP
2646     {
2647         wxString name(m_name);
2648         wxFontEncoding encoding(m_encoding);
2649
2650         if ( !name.empty() )
2651         {
2652             wxMBConv_iconv *conv = new wxMBConv_iconv(name);
2653             if ( conv->IsOk() )
2654                 return conv;
2655
2656             delete conv;
2657
2658 #if wxUSE_FONTMAP
2659             encoding =
2660                 wxFontMapperBase::Get()->CharsetToEncoding(name, false);
2661 #endif // wxUSE_FONTMAP
2662         }
2663 #if wxUSE_FONTMAP
2664         {
2665             const wxEncodingNameCache::iterator it = gs_nameCache.find(encoding);
2666             if ( it != gs_nameCache.end() )
2667             {
2668                 if ( it->second.empty() )
2669                     return NULL;
2670
2671                 wxMBConv_iconv *conv = new wxMBConv_iconv(it->second);
2672                 if ( conv->IsOk() )
2673                     return conv;
2674
2675                 delete conv;
2676             }
2677
2678             const wxChar** names = wxFontMapperBase::GetAllEncodingNames(encoding);
2679
2680             for ( ; *names; ++names )
2681             {
2682                 wxMBConv_iconv *conv = new wxMBConv_iconv(*names);
2683                 if ( conv->IsOk() )
2684                 {
2685                     gs_nameCache[encoding] = *names;
2686                     return conv;
2687                 }
2688
2689                 delete conv;
2690             }
2691
2692             gs_nameCache[encoding] = _T(""); // cache the failure
2693         }
2694 #endif // wxUSE_FONTMAP
2695     }
2696 #endif // HAVE_ICONV
2697
2698 #ifdef wxHAVE_WIN32_MB2WC
2699     {
2700 #if wxUSE_FONTMAP
2701         wxMBConv_win32 *conv = m_name ? new wxMBConv_win32(m_name)
2702                                       : new wxMBConv_win32(m_encoding);
2703         if ( conv->IsOk() )
2704             return conv;
2705
2706         delete conv;
2707 #else
2708         return NULL;
2709 #endif
2710     }
2711 #endif // wxHAVE_WIN32_MB2WC
2712 #if defined(__WXMAC__)
2713     {
2714         // leave UTF16 and UTF32 to the built-ins of wx
2715         if ( m_name || ( m_encoding < wxFONTENCODING_UTF16BE ||
2716             ( m_encoding >= wxFONTENCODING_MACMIN && m_encoding <= wxFONTENCODING_MACMAX ) ) )
2717         {
2718
2719 #if wxUSE_FONTMAP
2720             wxMBConv_mac *conv = m_name ? new wxMBConv_mac(m_name)
2721                                         : new wxMBConv_mac(m_encoding);
2722 #else
2723             wxMBConv_mac *conv = new wxMBConv_mac(m_encoding);
2724 #endif
2725             if ( conv->IsOk() )
2726                  return conv;
2727
2728             delete conv;
2729         }
2730     }
2731 #endif
2732 #if defined(__WXCOCOA__)
2733     {
2734         if ( m_name || ( m_encoding <= wxFONTENCODING_UTF16 ) )
2735         {
2736
2737 #if wxUSE_FONTMAP
2738             wxMBConv_cocoa *conv = m_name ? new wxMBConv_cocoa(m_name)
2739                                           : new wxMBConv_cocoa(m_encoding);
2740 #else
2741             wxMBConv_cocoa *conv = new wxMBConv_cocoa(m_encoding);
2742 #endif
2743             if ( conv->IsOk() )
2744                  return conv;
2745
2746             delete conv;
2747         }
2748     }
2749 #endif
2750     // step (2)
2751     wxFontEncoding enc = m_encoding;
2752 #if wxUSE_FONTMAP
2753     if ( enc == wxFONTENCODING_SYSTEM && m_name )
2754     {
2755         // use "false" to suppress interactive dialogs -- we can be called from
2756         // anywhere and popping up a dialog from here is the last thing we want to
2757         // do
2758         enc = wxFontMapperBase::Get()->CharsetToEncoding(m_name, false);
2759     }
2760 #endif // wxUSE_FONTMAP
2761
2762     switch ( enc )
2763     {
2764         case wxFONTENCODING_UTF7:
2765              return new wxMBConvUTF7;
2766
2767         case wxFONTENCODING_UTF8:
2768              return new wxMBConvUTF8;
2769
2770         case wxFONTENCODING_UTF16BE:
2771              return new wxMBConvUTF16BE;
2772
2773         case wxFONTENCODING_UTF16LE:
2774              return new wxMBConvUTF16LE;
2775
2776         case wxFONTENCODING_UTF32BE:
2777              return new wxMBConvUTF32BE;
2778
2779         case wxFONTENCODING_UTF32LE:
2780              return new wxMBConvUTF32LE;
2781
2782         default:
2783              // nothing to do but put here to suppress gcc warnings
2784              ;
2785     }
2786
2787     // step (3)
2788 #if wxUSE_FONTMAP
2789     {
2790         wxMBConv_wxwin *conv = m_name ? new wxMBConv_wxwin(m_name)
2791                                       : new wxMBConv_wxwin(m_encoding);
2792         if ( conv->IsOk() )
2793             return conv;
2794
2795         delete conv;
2796     }
2797 #endif // wxUSE_FONTMAP
2798
2799     // NB: This is a hack to prevent deadlock. What could otherwise happen
2800     //     in Unicode build: wxConvLocal creation ends up being here
2801     //     because of some failure and logs the error. But wxLog will try to
2802     //     attach timestamp, for which it will need wxConvLocal (to convert
2803     //     time to char* and then wchar_t*), but that fails, tries to log
2804     //     error, but wxLog has a (already locked) critical section that
2805     //     guards static buffer.
2806     static bool alreadyLoggingError = false;
2807     if (!alreadyLoggingError)
2808     {
2809         alreadyLoggingError = true;
2810         wxLogError(_("Cannot convert from the charset '%s'!"),
2811                    m_name ? m_name
2812                       :
2813 #if wxUSE_FONTMAP
2814                          wxFontMapperBase::GetEncodingDescription(m_encoding).c_str()
2815 #else // !wxUSE_FONTMAP
2816                          wxString::Format(_("encoding %s"), m_encoding).c_str()
2817 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
2818               );
2819         alreadyLoggingError = false;
2820     }
2821
2822     return NULL;
2823 }
2824
2825 void wxCSConv::CreateConvIfNeeded() const
2826 {
2827     if ( m_deferred )
2828     {
2829         wxCSConv *self = (wxCSConv *)this; // const_cast
2830
2831 #if wxUSE_INTL
2832         // if we don't have neither the name nor the encoding, use the default
2833         // encoding for this system
2834         if ( !m_name && m_encoding == wxFONTENCODING_SYSTEM )
2835         {
2836             self->m_name = wxStrdup(wxLocale::GetSystemEncodingName());
2837         }
2838 #endif // wxUSE_INTL
2839
2840         self->m_convReal = DoCreate();
2841         self->m_deferred = false;
2842     }
2843 }
2844
2845 size_t wxCSConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
2846 {
2847     CreateConvIfNeeded();
2848
2849     if (m_convReal)
2850         return m_convReal->MB2WC(buf, psz, n);
2851
2852     // latin-1 (direct)
2853     size_t len = strlen(psz);
2854
2855     if (buf)
2856     {
2857         for (size_t c = 0; c <= len; c++)
2858             buf[c] = (unsigned char)(psz[c]);
2859     }
2860
2861     return len;
2862 }
2863
2864 size_t wxCSConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
2865 {
2866     CreateConvIfNeeded();
2867
2868     if (m_convReal)
2869         return m_convReal->WC2MB(buf, psz, n);
2870
2871     // latin-1 (direct)
2872     const size_t len = wxWcslen(psz);
2873     if (buf)
2874     {
2875         for (size_t c = 0; c <= len; c++)
2876         {
2877             if (psz[c] > 0xFF)
2878                 return (size_t)-1;
2879             buf[c] = (char)psz[c];
2880         }
2881     }
2882     else
2883     {
2884         for (size_t c = 0; c <= len; c++)
2885         {
2886             if (psz[c] > 0xFF)
2887                 return (size_t)-1;
2888         }
2889     }
2890
2891     return len;
2892 }
2893
2894 // ----------------------------------------------------------------------------
2895 // globals
2896 // ----------------------------------------------------------------------------
2897
2898 #ifdef __WINDOWS__
2899     static wxMBConv_win32 wxConvLibcObj;
2900 #elif defined(__WXMAC__) && !defined(__MACH__)
2901     static wxMBConv_mac wxConvLibcObj ;
2902 #else
2903     static wxMBConvLibc wxConvLibcObj;
2904 #endif
2905
2906 static wxCSConv wxConvLocalObj(wxFONTENCODING_SYSTEM);
2907 static wxCSConv wxConvISO8859_1Obj(wxFONTENCODING_ISO8859_1);
2908 static wxMBConvUTF7 wxConvUTF7Obj;
2909 static wxMBConvUTF8 wxConvUTF8Obj;
2910
2911 WXDLLIMPEXP_DATA_BASE(wxMBConv&) wxConvLibc = wxConvLibcObj;
2912 WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal = wxConvLocalObj;
2913 WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvISO8859_1 = wxConvISO8859_1Obj;
2914 WXDLLIMPEXP_DATA_BASE(wxMBConvUTF7&) wxConvUTF7 = wxConvUTF7Obj;
2915 WXDLLIMPEXP_DATA_BASE(wxMBConvUTF8&) wxConvUTF8 = wxConvUTF8Obj;
2916 WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent = &wxConvLibcObj;
2917 WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName = &
2918 #ifdef __WXOSX__
2919                                     wxConvUTF8Obj;
2920 #else
2921                                     wxConvLibcObj;
2922 #endif
2923
2924
2925 #else // !wxUSE_WCHAR_T
2926
2927 // stand-ins in absence of wchar_t
2928 WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc,
2929                                 wxConvISO8859_1,
2930                                 wxConvLocal,
2931                                 wxConvUTF8;
2932
2933 #endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T