fixing focus handling for generic controls in carbon-cfm

[wxWidgets.git] / src / common / strconv.cpp

diff --git a/src/common/strconv.cpp b/src/common/strconv.cpp
index 2279100d9372101c6ab25b7a1d3d1ccf3ea87948..080b2078a7952ded3c5bbfeb4005d84f6913ec86 100644 (file)
--- a/src/common/strconv.cpp
+++ b/src/common/strconv.cpp
@@ -1,11 +1,14 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        strconv.cpp
 // Purpose:     Unicode conversion classes
 /////////////////////////////////////////////////////////////////////////////
 // Name:        strconv.cpp
 // Purpose:     Unicode conversion classes

-// Author:      Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik
+// Author:      Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik,
+//              Ryan Norton, Fredrik Roubert (UTF7)

 // Modified by:
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Modified by:
 // Created:     29/01/98
 // RCS-ID:      $Id$

-// Copyright:   (c) 1999 Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik
+// Copyright:   (c) 1999 Ove Kaaven, Robert Roebling, Vaclav Slavik
+//              (c) 2000-2003 Vadim Zeitlin
+//              (c) 2004 Ryan Norton, Fredrik Roubert

 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 


@@ -17,10 +20,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#ifdef __GNUG__
-  #pragma implementation "strconv.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -33,8 +32,13 @@
     #include "wx/log.h"
 #endif // WX_PRECOMP
 
     #include "wx/log.h"
 #endif // WX_PRECOMP
 

-#ifdef __WXMSW__
+#include "wx/strconv.h"
+
+#if wxUSE_WCHAR_T
+
+#ifdef __WINDOWS__

     #include "wx/msw/private.h"
     #include "wx/msw/private.h"

+    #include "wx/msw/missing.h"

 #endif
 
 #ifndef __WXWINCE__
 #endif
 
 #ifndef __WXWINCE__


@@ -45,52 +49,9 @@
 #include <string.h>
 #include <stdlib.h>
 
 #include <string.h>
 #include <stdlib.h>
 

-#include "wx/module.h"
-#include "wx/strconv.h"
-
-// ----------------------------------------------------------------------------
-// globals
-// ----------------------------------------------------------------------------
-
-#if wxUSE_WCHAR_T
-    WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc;
-    WXDLLIMPEXP_DATA_BASE(wxCSConv) wxConvLocal((const wxChar *)NULL);
-    WXDLLIMPEXP_DATA_BASE(wxCSConv) wxConvISO8859_1(_T("iso-8859-1"));
-#else
-    // stand-ins in absence of wchar_t
-    WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc,
-                                    wxConvFile,
-                                    wxConvISO8859_1,
-                                    wxConvLocal,
-                                    wxConvUTF8;
-#endif // wxUSE_WCHAR_T
-
-WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent = &wxConvLibc;
-
-class wxStrConvModule: public wxModule
-{
-public:
-    wxStrConvModule() : wxModule() { }
-    virtual bool OnInit() { return TRUE; }
-    virtual void OnExit()
-    {
-#if wxUSE_WCHAR_T
-         wxConvLocal.Clear();
-         wxConvISO8859_1.Clear();
-#endif
-    }
-
-    DECLARE_DYNAMIC_CLASS(wxStrConvModule)
-};
-
-IMPLEMENT_DYNAMIC_CLASS(wxStrConvModule, wxModule)
-
-
-// ----------------------------------------------------------------------------
-// headers
-// ----------------------------------------------------------------------------
-
-#if wxUSE_WCHAR_T
+#if defined(__WIN32__) && !defined(__WXMICROWIN__)
+    #define wxHAVE_WIN32_MB2WC
+#endif // __WIN32__ but !__WXMICROWIN__

 
 #ifdef __SALFORDC__
     #include <clib.h>
 
 #ifdef __SALFORDC__
     #include <clib.h>


@@ -98,61 +59,40 @@ IMPLEMENT_DYNAMIC_CLASS(wxStrConvModule, wxModule)
 
 #ifdef HAVE_ICONV
     #include <iconv.h>
 
 #ifdef HAVE_ICONV
     #include <iconv.h>

+    #include "wx/thread.h"

 #endif
 
 #include "wx/encconv.h"
 #include "wx/fontmap.h"
 #endif
 
 #include "wx/encconv.h"
 #include "wx/fontmap.h"

+#include "wx/utils.h"

 
 

-// ----------------------------------------------------------------------------
-// macros
-// ----------------------------------------------------------------------------
-
-#define BSWAP_UCS4(str, len) { unsigned _c; for (_c=0; _c<len; _c++) str[_c]=wxUINT32_SWAP_ALWAYS(str[_c]); }
-#define BSWAP_UTF16(str, len) { unsigned _c; for (_c=0; _c<len; _c++) str[_c]=wxUINT16_SWAP_ALWAYS(str[_c]); }
-
-// under Unix SIZEOF_WCHAR_T is defined by configure, but under other platforms
-// it might be not defined - assume the most common value
-#ifndef SIZEOF_WCHAR_T
-    #define SIZEOF_WCHAR_T 2
-#endif // !defined(SIZEOF_WCHAR_T)
+#ifdef __WXMAC__
+#ifndef __DARWIN__
+#include <ATSUnicode.h>
+#include <TextCommon.h>
+#include <TextEncodingConverter.h>
+#endif

 
 

-#if SIZEOF_WCHAR_T == 4
-    #define WC_NAME         "UCS4"
-    #define WC_BSWAP         BSWAP_UCS4
-    #ifdef WORDS_BIGENDIAN
-      #define WC_NAME_BEST  "UCS-4BE"
-    #else
-      #define WC_NAME_BEST  "UCS-4LE"
-    #endif
-#elif SIZEOF_WCHAR_T == 2
-    #define WC_NAME         "UTF16"
-    #define WC_BSWAP         BSWAP_UTF16
-    #define WC_UTF16
-    #ifdef WORDS_BIGENDIAN
-      #define WC_NAME_BEST  "UTF-16BE"
-    #else
-      #define WC_NAME_BEST  "UTF-16LE"
-    #endif
-#else // sizeof(wchar_t) != 2 nor 4
-    // I don't know what to do about this
-    #error "Weird sizeof(wchar_t): please report your platform details to wx-users mailing list"
+#include  "wx/mac/private.h"  // includes mac headers

 #endif
 
 #endif
 

+#define TRACE_STRCONV _T("strconv")
+

 // ============================================================================
 // implementation
 // ============================================================================
 
 // ----------------------------------------------------------------------------
 // ============================================================================
 // implementation
 // ============================================================================
 
 // ----------------------------------------------------------------------------

-// UTF-16 en/decoding
+// UTF-16 en/decoding to/from UCS-4

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-#ifdef WC_UTF16

 
 

-static size_t encode_utf16(wxUint32 input, wchar_t *output)
+static size_t encode_utf16(wxUint32 input, wxUint16 *output)

 {
     if (input<=0xffff)
     {
 {
     if (input<=0xffff)
     {

-        if (output) *output++ = (wchar_t) input;
+        if (output)
+            *output = (wxUint16) input;

         return 1;
     }
     else if (input>=0x110000)
         return 1;
     }
     else if (input>=0x110000)


@@ -163,21 +103,21 @@ static size_t encode_utf16(wxUint32 input, wchar_t *output)
     {
         if (output)
         {
     {
         if (output)
         {

-            *output++ = (wchar_t) ((input >> 10)+0xd7c0);
-            *output++ = (wchar_t) ((input&0x3ff)+0xdc00);
+            *output++ = (wxUint16) ((input >> 10)+0xd7c0);
+            *output = (wxUint16) ((input&0x3ff)+0xdc00);

         }
         return 2;
     }
 }
 
         }
         return 2;
     }
 }
 

-static size_t decode_utf16(const wchar_t* input, wxUint32& output)
+static size_t decode_utf16(const wxUint16* input, wxUint32& output)

 {
     if ((*input<0xd800) || (*input>0xdfff))
     {
         output = *input;
         return 1;
     }
 {
     if ((*input<0xd800) || (*input>0xdfff))
     {
         output = *input;
         return 1;
     }

-    else if ((input[1]<0xdc00) || (input[1]>=0xdfff))
+    else if ((input[1]<0xdc00) || (input[1]>0xdfff))

     {
         output = *input;
         return (size_t)-1;
     {
         output = *input;
         return (size_t)-1;


@@ -189,53 +129,14 @@ static size_t decode_utf16(const wchar_t* input, wxUint32& output)
     }
 }
 
     }
 }
 

-#endif // WC_UTF16

 
 // ----------------------------------------------------------------------------
 // wxMBConv
 // ----------------------------------------------------------------------------
 
 
 // ----------------------------------------------------------------------------
 // wxMBConv
 // ----------------------------------------------------------------------------
 

-#define IGNORE_LIBC 0
-

 wxMBConv::~wxMBConv()
 {
 wxMBConv::~wxMBConv()
 {

-    // nothing to do here
-}
-
-size_t wxMBConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
-{
-#if IGNORE_LIBC
-    if (buf)
-    {
-        for (size_t i = 0; i < strlen( psz )+1; i++)
-            buf[i] = (wchar_t) psz[i];
-        return strlen( psz );
-    }
-    else
-    {
-        return strlen( psz );
-    }
-#else
-    return wxMB2WC(buf, psz, n);
-#endif
-}
-
-size_t wxMBConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
-{
-#if IGNORE_LIBC
-    if (buf)
-    {
-        for (size_t i = 0; i < wxStrlen( psz )+1; i++)
-            buf[i] = (char) psz[i];
-        return wxStrlen( psz );
-    }
-    else
-    {
-        return wxStrlen( psz );
-    }
-#else
-    return wxWC2MB(buf, psz, n);
-#endif
+    // nothing to do here (necessary for Darwin linking probably)

 }
 
 const wxWCharBuffer wxMBConv::cMB2WC(const char *psz) const
 }
 
 const wxWCharBuffer wxMBConv::cMB2WC(const char *psz) const


@@ -248,9 +149,11 @@ const wxWCharBuffer wxMBConv::cMB2WC(const char *psz) const
         {
             // now do the actual conversion
             wxWCharBuffer buf(nLen);
         {
             // now do the actual conversion
             wxWCharBuffer buf(nLen);

-            MB2WC(buf.data(), psz, nLen + 1); // with the trailing NUL
-
-            return buf;
+            nLen = MB2WC(buf.data(), psz, nLen + 1); // with the trailing NULL
+            if ( nLen != (size_t)-1 )
+            {
+                return buf;
+            }

         }
     }
 
         }
     }
 


@@ -266,10 +169,12 @@ const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *pwz) const
         size_t nLen = WC2MB(NULL, pwz, 0);
         if ( nLen != (size_t)-1 )
         {
         size_t nLen = WC2MB(NULL, pwz, 0);
         if ( nLen != (size_t)-1 )
         {

-            wxCharBuffer buf(nLen);
-            WC2MB(buf.data(), pwz, nLen + 1);
-
-            return buf;
+            wxCharBuffer buf(nLen+3);       // space for a wxUint32 trailing zero
+            nLen = WC2MB(buf.data(), pwz, nLen + 4);
+            if ( nLen != (size_t)-1 )
+            {
+                return buf;
+            }

         }
     }
 
         }
     }
 


@@ -278,103 +183,272 @@ const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *pwz) const
     return buf;
 }
 
     return buf;
 }
 

+const wxWCharBuffer wxMBConv::cMB2WC(const char *szString, size_t nStringLen, size_t* pOutSize) const
+{
+    wxASSERT(pOutSize != NULL);
+
+    const char* szEnd = szString + nStringLen + 1;
+    const char* szPos = szString;
+    const char* szStart = szPos;
+
+    size_t nActualLength = 0;
+    size_t nCurrentSize = nStringLen; //try normal size first (should never resize?)
+
+    wxWCharBuffer theBuffer(nCurrentSize);
+
+    //Convert the string until the length() is reached, continuing the
+    //loop every time a null character is reached
+    while(szPos != szEnd)
+    {
+        wxASSERT(szPos < szEnd); //something is _really_ screwed up if this rings true
+
+        //Get the length of the current (sub)string
+        size_t nLen = MB2WC(NULL, szPos, 0);
+
+        //Invalid conversion?
+        if( nLen == (size_t)-1 )
+        {
+            *pOutSize = 0;
+            theBuffer.data()[0u] = wxT('\0');
+            return theBuffer;
+        }
+
+
+        //Increase the actual length (+1 for current null character)
+        nActualLength += nLen + 1;
+
+        //if buffer too big, realloc the buffer
+        if (nActualLength > (nCurrentSize+1))
+        {
+            wxWCharBuffer theNewBuffer(nCurrentSize << 1);
+            memcpy(theNewBuffer.data(), theBuffer.data(), nCurrentSize * sizeof(wchar_t));
+            theBuffer = theNewBuffer;
+            nCurrentSize <<= 1;
+        }
+
+        //Convert the current (sub)string
+        if ( MB2WC(&theBuffer.data()[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
+        {
+            *pOutSize = 0;
+            theBuffer.data()[0u] = wxT('\0');
+            return theBuffer;
+        }
+
+        //Increment to next (sub)string
+        //Note that we have to use strlen instead of nLen here
+        //because XX2XX gives us the size of the output buffer,
+        //which is not necessarily the length of the string
+        szPos += strlen(szPos) + 1;
+    }
+
+    //success - return actual length and the buffer
+    *pOutSize = nActualLength;
+    return theBuffer;
+}
+
+const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *szString, size_t nStringLen, size_t* pOutSize) const
+{
+    wxASSERT(pOutSize != NULL);
+
+    const wchar_t* szEnd = szString + nStringLen + 1;
+    const wchar_t* szPos = szString;
+    const wchar_t* szStart = szPos;
+
+    size_t nActualLength = 0;
+    size_t nCurrentSize = nStringLen << 2; //try * 4 first
+
+    wxCharBuffer theBuffer(nCurrentSize);
+
+    //Convert the string until the length() is reached, continuing the
+    //loop every time a null character is reached
+    while(szPos != szEnd)
+    {
+        wxASSERT(szPos < szEnd); //something is _really_ screwed up if this rings true
+
+        //Get the length of the current (sub)string
+        size_t nLen = WC2MB(NULL, szPos, 0);
+
+        //Invalid conversion?
+        if( nLen == (size_t)-1 )
+        {
+            *pOutSize = 0;
+            theBuffer.data()[0u] = wxT('\0');
+            return theBuffer;
+        }
+
+        //Increase the actual length (+1 for current null character)
+        nActualLength += nLen + 1;
+
+        //if buffer too big, realloc the buffer
+        if (nActualLength > (nCurrentSize+1))
+        {
+            wxCharBuffer theNewBuffer(nCurrentSize << 1);
+            memcpy(theNewBuffer.data(), theBuffer.data(), nCurrentSize);
+            theBuffer = theNewBuffer;
+            nCurrentSize <<= 1;
+        }
+
+        //Convert the current (sub)string
+        if(WC2MB(&theBuffer.data()[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
+        {
+            *pOutSize = 0;
+            theBuffer.data()[0u] = wxT('\0');
+            return theBuffer;
+        }
+
+        //Increment to next (sub)string
+        //Note that we have to use wxWcslen instead of nLen here
+        //because XX2XX gives us the size of the output buffer,
+        //which is not necessarily the length of the string
+        szPos += wxWcslen(szPos) + 1;
+    }
+
+    //success - return actual length and the buffer
+    *pOutSize = nActualLength;
+    return theBuffer;
+}
+

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// UTF-7
+// wxMBConvLibc

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-WXDLLIMPEXP_DATA_BASE(wxMBConvUTF7) wxConvUTF7;
+size_t wxMBConvLibc::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    return wxMB2WC(buf, psz, n);
+}

 
 

-#if 0
-static char utf7_setD[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                        "abcdefghijklmnopqrstuvwxyz"
-                        "0123456789'(),-./:?";
-static char utf7_setO[]="!\"#$%&*;<=>@[]^_`{|}";
-static char utf7_setB[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                        "abcdefghijklmnopqrstuvwxyz"
-                        "0123456789+/";
-#endif
+size_t wxMBConvLibc::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    return wxWC2MB(buf, psz, n);
+}

 
 

-// TODO: write actual implementations of UTF-7 here
-size_t wxMBConvUTF7::MB2WC(wchar_t * WXUNUSED(buf),
-                           const char * WXUNUSED(psz),
-                           size_t WXUNUSED(n)) const
+#ifdef __UNIX__
+
+// ----------------------------------------------------------------------------
+// wxConvBrokenFileNames
+// ----------------------------------------------------------------------------
+
+wxConvBrokenFileNames::wxConvBrokenFileNames(const wxChar *charset)
+{
+    if ( !charset || wxStricmp(charset, _T("UTF-8")) == 0
+                  || wxStricmp(charset, _T("UTF8")) == 0  )
+        m_conv = new wxMBConvUTF8(wxMBConvUTF8::MAP_INVALID_UTF8_TO_OCTAL);
+    else
+        m_conv = new wxCSConv(charset);
+}
+
+size_t
+wxConvBrokenFileNames::MB2WC(wchar_t *outputBuf,
+                             const char *psz,
+                             size_t outputSize) const

 {
 {

-  return 0;
+    return m_conv->MB2WC( outputBuf, psz, outputSize );

 }
 
 }
 

-size_t wxMBConvUTF7::WC2MB(char * WXUNUSED(buf),
-                           const wchar_t * WXUNUSED(psz),
-                           size_t WXUNUSED(n)) const
+size_t
+wxConvBrokenFileNames::WC2MB(char *outputBuf,
+                             const wchar_t *psz,
+                             size_t outputSize) const

 {
 {

-  return 0;
+    return m_conv->WC2MB( outputBuf, psz, outputSize );

 }
 
 }
 

+#endif
+

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// UTF-8
+// UTF-7

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-WXDLLIMPEXP_DATA_BASE(wxMBConvUTF8) wxConvUTF8;
+// Implementation (C) 2004 Fredrik Roubert

 
 

-static wxUint32 utf8_max[]=
-    { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff, 0xffffffff };
+//
+// BASE64 decoding table
+//
+static const unsigned char utf7unb64[] =
+{
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
+    0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
+    0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
+    0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
+    0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
+    0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
+    0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
+    0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
+    0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+};

 
 

-size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+size_t wxMBConvUTF7::MB2WC(wchar_t *buf, const char *psz, size_t n) const

 {
     size_t len = 0;
 
     while (*psz && ((!buf) || (len < n)))
     {
 {
     size_t len = 0;
 
     while (*psz && ((!buf) || (len < n)))
     {

-        unsigned char cc = *psz++, fc = cc;
-        unsigned cnt;
-        for (cnt = 0; fc & 0x80; cnt++)
-            fc <<= 1;
-        if (!cnt)
+        unsigned char cc = *psz++;
+        if (cc != '+')

         {
             // plain ASCII char
             if (buf)
                 *buf++ = cc;
             len++;
         }
         {
             // plain ASCII char
             if (buf)
                 *buf++ = cc;
             len++;
         }

+        else if (*psz == '-')
+        {
+            // encoded plus sign
+            if (buf)
+                *buf++ = cc;
+            len++;
+            psz++;
+        }

         else
         {
         else
         {

-            cnt--;
-            if (!cnt)
-            {
-                // invalid UTF-8 sequence
-                return (size_t)-1;
-            }
-            else
+            // BASE64 encoded string
+            bool lsb;
+            unsigned char c;
+            unsigned int d, l;
+            for (lsb = false, d = 0, l = 0;
+                (cc = utf7unb64[(unsigned char)*psz]) != 0xff; psz++)

             {
             {

-                unsigned ocnt = cnt - 1;
-                wxUint32 res = cc & (0x3f >> cnt);
-                while (cnt--)
+                d <<= 6;
+                d += cc;
+                for (l += 6; l >= 8; lsb = !lsb)

                 {
                 {

-                    cc = *psz++;
-                    if ((cc & 0xC0) != 0x80)
+                    c = (unsigned char)((d >> (l -= 8)) % 256);
+                    if (lsb)

                     {
                     {

-                        // invalid UTF-8 sequence
-                        return (size_t)-1;
+                        if (buf)
+                            *buf++ |= c;
+                        len ++;

                     }
                     }

-                    res = (res << 6) | (cc & 0x3f);
+                    else
+                        if (buf)
+                            *buf = (wchar_t)(c << 8);

                 }
                 }

-                if (res <= utf8_max[ocnt])
-                {
-                    // illegal UTF-8 encoding
-                    return (size_t)-1;
-                }
-#ifdef WC_UTF16
-                size_t pa = encode_utf16(res, buf);
-                if (pa == (size_t)-1)
-                  return (size_t)-1;
-                if (buf)
-                    buf += pa;
-                len += pa;
-#else // !WC_UTF16
-                if (buf)
-                    *buf++ = res;
-                len++;
-#endif // WC_UTF16/!WC_UTF16

             }
             }

+            if (*psz == '-')
+                psz++;

         }
     }
     if (buf && (len < n))
         }
     }
     if (buf && (len < n))


@@ -382,244 +456,1024 @@ size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
     return len;
 }
 
     return len;
 }
 

-size_t wxMBConvUTF8::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+//
+// BASE64 encoding table
+//
+static const unsigned char utf7enb64[] =
+{
+    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+    'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+    'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+    'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+    'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+    'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+    'w', 'x', 'y', 'z', '0', '1', '2', '3',
+    '4', '5', '6', '7', '8', '9', '+', '/'
+};
+
+//
+// UTF-7 encoding table
+//
+// 0 - Set D (directly encoded characters)
+// 1 - Set O (optional direct characters)
+// 2 - whitespace characters (optional)
+// 3 - special characters
+//
+static const unsigned char utf7encode[128] =
+{
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 3, 3, 2, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    2, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 3, 0, 0, 0, 3,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0,
+    1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 1, 1, 1,
+    1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 3, 3
+};
+
+size_t wxMBConvUTF7::WC2MB(char *buf, const wchar_t *psz, size_t n) const

 {
 {

+
+

     size_t len = 0;
 
     while (*psz && ((!buf) || (len < n)))
     {
     size_t len = 0;
 
     while (*psz && ((!buf) || (len < n)))
     {

-        wxUint32 cc;
-#ifdef WC_UTF16
-        size_t pa = decode_utf16(psz, cc);
-        psz += (pa == (size_t)-1) ? 1 : pa;
-#else
-        cc=(*psz++) & 0x7fffffff;
-#endif
-        unsigned cnt;
-        for (cnt = 0; cc > utf8_max[cnt]; cnt++) {}
-        if (!cnt)
+        wchar_t cc = *psz++;
+        if (cc < 0x80 && utf7encode[cc] < 1)

         {
             // plain ASCII char
             if (buf)
         {
             // plain ASCII char
             if (buf)

-                *buf++ = (char) cc;
+                *buf++ = (char)cc;

             len++;
         }
             len++;
         }

-
+#ifndef WC_UTF16
+        else if (((wxUint32)cc) > 0xffff)
+        {
+            // no surrogate pair generation (yet?)
+            return (size_t)-1;
+        }
+#endif

         else
         {
         else
         {

-            len += cnt + 1;

             if (buf)
             if (buf)

+                *buf++ = '+';
+            len++;
+            if (cc != '+')

             {
             {

-                *buf++ = (char) ((-128 >> cnt) | ((cc >> (cnt * 6)) & (0x3f >> cnt)));
-                while (cnt--)
-                    *buf++ = (char) (0x80 | ((cc >> (cnt * 6)) & 0x3f));
+                // BASE64 encode string
+                unsigned int lsb, d, l;
+                for (d = 0, l = 0;; psz++)
+                {
+                    for (lsb = 0; lsb < 2; lsb ++)
+                    {
+                        d <<= 8;
+                        d += lsb ? cc & 0xff : (cc & 0xff00) >> 8;
+
+                        for (l += 8; l >= 6; )
+                        {
+                            l -= 6;
+                            if (buf)
+                                *buf++ = utf7enb64[(d >> l) % 64];
+                            len++;
+                        }
+                    }
+                    cc = *psz;
+                    if (!(cc) || (cc < 0x80 && utf7encode[cc] < 1))
+                        break;
+                }
+                if (l != 0)
+                {
+                    if (buf)
+                        *buf++ = utf7enb64[((d % 16) << (6 - l)) % 64];
+                    len++;
+                }

             }
             }

+            if (buf)
+                *buf++ = '-';
+            len++;

         }
     }
         }
     }

-
-    if (buf && (len<n)) *buf = 0;
-
+    if (buf && (len < n))
+        *buf = 0;

     return len;
 }
 
     return len;
 }
 

-// ============================================================================
-// wxCharacterSet and derived classes
-// ============================================================================
-

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// wxCharacterSet is the ABC for the classes below
+// UTF-8

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-class wxCharacterSet
-{
-public:
-    wxCharacterSet(const wxChar*name) : cname(name) {}
-    virtual ~wxCharacterSet() {}
-    virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) = 0;
-    virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) = 0;
-    virtual bool usable() const = 0;
-public:
-    const wxChar*cname;
-};
+static wxUint32 utf8_max[]=
+    { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff, 0xffffffff };

 
 

-// ----------------------------------------------------------------------------
-// ID_CharSet: implementation of wxCharacterSet using an existing wxMBConv
-// ----------------------------------------------------------------------------
+// boundaries of the private use area we use to (temporarily) remap invalid
+// characters invalid in a UTF-8 encoded string
+const wxUint32 wxUnicodePUA = 0x100000;
+const wxUint32 wxUnicodePUAEnd = wxUnicodePUA + 256;

 
 

-class ID_CharSet : public wxCharacterSet
+size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const

 {
 {

-public:
-    ID_CharSet(const wxChar *name, wxMBConv *cnv)
-        : wxCharacterSet(name), work(cnv) {}
-
-    size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
-        { return work ? work->MB2WC(buf,psz,n) : (size_t)-1; }
-
-    size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
-        { return work ? work->WC2MB(buf,psz,n) : (size_t)-1; }
-
-    bool usable() const
-        { return work!=NULL; }
-public:
-    wxMBConv*work;
-};
-
-
-// ============================================================================
-// The classes doing conversion using the iconv_xxx() functions
-// ============================================================================
+    size_t len = 0;

 
 

-#ifdef HAVE_ICONV
+    while (*psz && ((!buf) || (len < n)))
+    {
+        const char *opsz = psz;
+        bool invalid = false;
+        unsigned char cc = *psz++, fc = cc;
+        unsigned cnt;
+        for (cnt = 0; fc & 0x80; cnt++)
+            fc <<= 1;
+        if (!cnt)
+        {
+            // plain ASCII char
+            if (buf)
+                *buf++ = cc;
+            len++;

 
 

-// VS: glibc 2.1.3 is broken in that iconv() conversion to/from UCS4 fails with E2BIG
-//     if output buffer is _exactly_ as big as needed. Such case is (unless there's
-//     yet another bug in glibc) the only case when iconv() returns with (size_t)-1
-//     (which means error) and says there are 0 bytes left in the input buffer --
-//     when _real_ error occurs, bytes-left-in-input buffer is non-zero. Hence,
-//     this alternative test for iconv() failure.
-//     [This bug does not appear in glibc 2.2.]
-#if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ <= 1
-#define ICONV_FAILED(cres, bufLeft) ((cres == (size_t)-1) && \
-                                     (errno != E2BIG || bufLeft != 0))
-#else
+            // escape the escape character for octal escapes
+            if ((m_options & MAP_INVALID_UTF8_TO_OCTAL)
+                    && cc == '\\' && (!buf || len < n))
+            {
+                if (buf)
+                    *buf++ = cc;
+                len++;
+            }
+        }
+        else
+        {
+            cnt--;
+            if (!cnt)
+            {
+                // invalid UTF-8 sequence
+                invalid = true;
+            }
+            else
+            {
+                unsigned ocnt = cnt - 1;
+                wxUint32 res = cc & (0x3f >> cnt);
+                while (cnt--)
+                {
+                    cc = *psz;
+                    if ((cc & 0xC0) != 0x80)
+                    {
+                        // invalid UTF-8 sequence
+                        invalid = true;
+                        break;
+                    }
+                    psz++;
+                    res = (res << 6) | (cc & 0x3f);
+                }
+                if (invalid || res <= utf8_max[ocnt])
+                {
+                    // illegal UTF-8 encoding
+                    invalid = true;
+                }
+                else if ((m_options & MAP_INVALID_UTF8_TO_PUA) &&
+                        res >= wxUnicodePUA && res < wxUnicodePUAEnd)
+                {
+                    // if one of our PUA characters turns up externally
+                    // it must also be treated as an illegal sequence
+                    // (a bit like you have to escape an escape character)
+                    invalid = true;
+                }
+                else
+                {
+#ifdef WC_UTF16
+                    // cast is ok because wchar_t == wxUuint16 if WC_UTF16
+                    size_t pa = encode_utf16(res, (wxUint16 *)buf);
+                    if (pa == (size_t)-1)
+                    {
+                        invalid = true;
+                    }
+                    else
+                    {
+                        if (buf)
+                            buf += pa;
+                        len += pa;
+                    }
+#else // !WC_UTF16
+                    if (buf)
+                        *buf++ = res;
+                    len++;
+#endif // WC_UTF16/!WC_UTF16
+                }
+            }
+            if (invalid)
+            {
+                if (m_options & MAP_INVALID_UTF8_TO_PUA)
+                {
+                    while (opsz < psz && (!buf || len < n))
+                    {
+#ifdef WC_UTF16
+                        // cast is ok because wchar_t == wxUuint16 if WC_UTF16
+                        size_t pa = encode_utf16((unsigned char)*opsz + wxUnicodePUA, (wxUint16 *)buf);
+                        wxASSERT(pa != (size_t)-1);
+                        if (buf)
+                            buf += pa;
+                        opsz++;
+                        len += pa;
+#else
+                        if (buf)
+                            *buf++ = wxUnicodePUA + (unsigned char)*opsz;
+                        opsz++;
+                        len++;
+#endif
+                    }
+                }
+                else if (m_options & MAP_INVALID_UTF8_TO_OCTAL)
+                {
+                    while (opsz < psz && (!buf || len < n))
+                    {
+                        if ( buf && len + 3 < n )
+                        {
+                            unsigned char on = *opsz;
+                            *buf++ = L'\\';
+                            *buf++ = (wchar_t)( L'0' + on / 0100 );
+                            *buf++ = (wchar_t)( L'0' + (on % 0100) / 010 );
+                            *buf++ = (wchar_t)( L'0' + on % 010 );
+                        }
+                        opsz++;
+                        len += 4;
+                    }
+                }
+                else // MAP_INVALID_UTF8_NOT
+                {
+                    return (size_t)-1;
+                }
+            }
+        }
+    }
+    if (buf && (len < n))
+        *buf = 0;
+    return len;
+}
+
+static inline bool isoctal(wchar_t wch)
+{
+    return L'0' <= wch && wch <= L'7';
+}
+
+size_t wxMBConvUTF8::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len = 0;
+
+    while (*psz && ((!buf) || (len < n)))
+    {
+        wxUint32 cc;
+#ifdef WC_UTF16
+        // cast is ok for WC_UTF16
+        size_t pa = decode_utf16((const wxUint16 *)psz, cc);
+        psz += (pa == (size_t)-1) ? 1 : pa;
+#else
+        cc=(*psz++) & 0x7fffffff;
+#endif
+
+        if ( (m_options & MAP_INVALID_UTF8_TO_PUA)
+                && cc >= wxUnicodePUA && cc < wxUnicodePUAEnd )
+        {
+            if (buf)
+                *buf++ = (char)(cc - wxUnicodePUA);
+            len++;
+        }
+        else if ( (m_options & MAP_INVALID_UTF8_TO_OCTAL)
+                    && cc == L'\\' && psz[0] == L'\\' )
+        {
+            if (buf)
+                *buf++ = (char)cc;
+            psz++;
+            len++;
+        }
+        else if ( (m_options & MAP_INVALID_UTF8_TO_OCTAL) &&
+                    cc == L'\\' &&
+                        isoctal(psz[0]) && isoctal(psz[1]) && isoctal(psz[2]) )
+        {
+            if (buf)
+            {
+                *buf++ = (char) ((psz[0] - L'0')*0100 +
+                                 (psz[1] - L'0')*010 +
+                                 (psz[2] - L'0'));
+            }
+
+            psz += 3;
+            len++;
+        }
+        else
+        {
+            unsigned cnt;
+            for (cnt = 0; cc > utf8_max[cnt]; cnt++) {}
+            if (!cnt)
+            {
+                // plain ASCII char
+                if (buf)
+                    *buf++ = (char) cc;
+                len++;
+            }
+
+            else
+            {
+                len += cnt + 1;
+                if (buf)
+                {
+                    *buf++ = (char) ((-128 >> cnt) | ((cc >> (cnt * 6)) & (0x3f >> cnt)));
+                    while (cnt--)
+                        *buf++ = (char) (0x80 | ((cc >> (cnt * 6)) & 0x3f));
+                }
+            }
+        }
+    }
+
+    if (buf && (len<n))
+        *buf = 0;
+
+    return len;
+}
+
+// ----------------------------------------------------------------------------
+// UTF-16
+// ----------------------------------------------------------------------------
+
+#ifdef WORDS_BIGENDIAN
+    #define wxMBConvUTF16straight wxMBConvUTF16BE
+    #define wxMBConvUTF16swap     wxMBConvUTF16LE
+#else
+    #define wxMBConvUTF16swap     wxMBConvUTF16BE
+    #define wxMBConvUTF16straight wxMBConvUTF16LE
+#endif
+
+
+#ifdef WC_UTF16
+
+// copy 16bit MB to 16bit String
+size_t wxMBConvUTF16straight::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*(wxUint16*)psz && (!buf || len < n))
+    {
+        if (buf)
+            *buf++ = *(wxUint16*)psz;
+        len++;
+
+        psz += sizeof(wxUint16);
+    }
+    if (buf && len<n)   *buf=0;
+
+    return len;
+}
+
+
+// copy 16bit String to 16bit MB
+size_t wxMBConvUTF16straight::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*psz && (!buf || len < n))
+    {
+        if (buf)
+        {
+            *(wxUint16*)buf = *psz;
+            buf += sizeof(wxUint16);
+        }
+        len += sizeof(wxUint16);
+        psz++;
+    }
+    if (buf && len<=n-sizeof(wxUint16))   *(wxUint16*)buf=0;
+
+    return len;
+}
+
+
+// swap 16bit MB to 16bit String
+size_t wxMBConvUTF16swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*(wxUint16*)psz && (!buf || len < n))
+    {
+        if (buf)
+        {
+            ((char *)buf)[0] = psz[1];
+            ((char *)buf)[1] = psz[0];
+            buf++;
+        }
+        len++;
+        psz += sizeof(wxUint16);
+    }
+    if (buf && len<n)   *buf=0;
+
+    return len;
+}
+
+
+// swap 16bit MB to 16bit String
+size_t wxMBConvUTF16swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*psz && (!buf || len < n))
+    {
+        if (buf)
+        {
+            *buf++ = ((char*)psz)[1];
+            *buf++ = ((char*)psz)[0];
+        }
+        len += sizeof(wxUint16);
+        psz++;
+    }
+    if (buf && len<=n-sizeof(wxUint16))   *(wxUint16*)buf=0;
+
+    return len;
+}
+
+
+#else // WC_UTF16
+
+
+// copy 16bit MB to 32bit String
+size_t wxMBConvUTF16straight::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*(wxUint16*)psz && (!buf || len < n))
+    {
+        wxUint32 cc;
+        size_t pa=decode_utf16((wxUint16*)psz, cc);
+        if (pa == (size_t)-1)
+            return pa;
+
+        if (buf)
+            *buf++ = cc;
+        len++;
+        psz += pa * sizeof(wxUint16);
+    }
+    if (buf && len<n)   *buf=0;
+
+    return len;
+}
+
+
+// copy 32bit String to 16bit MB
+size_t wxMBConvUTF16straight::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*psz && (!buf || len < n))
+    {
+        wxUint16 cc[2];
+        size_t pa=encode_utf16(*psz, cc);
+
+        if (pa == (size_t)-1)
+            return pa;
+
+        if (buf)
+        {
+            *(wxUint16*)buf = cc[0];
+            buf += sizeof(wxUint16);
+            if (pa > 1)
+            {
+                *(wxUint16*)buf = cc[1];
+                buf += sizeof(wxUint16);
+            }
+        }
+
+        len += pa*sizeof(wxUint16);
+        psz++;
+    }
+    if (buf && len<=n-sizeof(wxUint16))   *(wxUint16*)buf=0;
+
+    return len;
+}
+
+
+// swap 16bit MB to 32bit String
+size_t wxMBConvUTF16swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*(wxUint16*)psz && (!buf || len < n))
+    {
+        wxUint32 cc;
+        char tmp[4];
+        tmp[0]=psz[1];  tmp[1]=psz[0];
+        tmp[2]=psz[3];  tmp[3]=psz[2];
+
+        size_t pa=decode_utf16((wxUint16*)tmp, cc);
+        if (pa == (size_t)-1)
+            return pa;
+
+        if (buf)
+            *buf++ = cc;
+
+        len++;
+        psz += pa * sizeof(wxUint16);
+    }
+    if (buf && len<n)   *buf=0;
+
+    return len;
+}
+
+
+// swap 32bit String to 16bit MB
+size_t wxMBConvUTF16swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*psz && (!buf || len < n))
+    {
+        wxUint16 cc[2];
+        size_t pa=encode_utf16(*psz, cc);
+
+        if (pa == (size_t)-1)
+            return pa;
+
+        if (buf)
+        {
+            *buf++ = ((char*)cc)[1];
+            *buf++ = ((char*)cc)[0];
+            if (pa > 1)
+            {
+                *buf++ = ((char*)cc)[3];
+                *buf++ = ((char*)cc)[2];
+            }
+        }
+
+        len += pa*sizeof(wxUint16);
+        psz++;
+    }
+    if (buf && len<=n-sizeof(wxUint16))   *(wxUint16*)buf=0;
+
+    return len;
+}
+
+#endif // WC_UTF16
+
+
+// ----------------------------------------------------------------------------
+// UTF-32
+// ----------------------------------------------------------------------------
+
+#ifdef WORDS_BIGENDIAN
+#define wxMBConvUTF32straight  wxMBConvUTF32BE
+#define wxMBConvUTF32swap      wxMBConvUTF32LE
+#else
+#define wxMBConvUTF32swap      wxMBConvUTF32BE
+#define wxMBConvUTF32straight  wxMBConvUTF32LE
+#endif
+
+
+WXDLLIMPEXP_DATA_BASE(wxMBConvUTF32LE) wxConvUTF32LE;
+WXDLLIMPEXP_DATA_BASE(wxMBConvUTF32BE) wxConvUTF32BE;
+
+
+#ifdef WC_UTF16
+
+// copy 32bit MB to 16bit String
+size_t wxMBConvUTF32straight::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*(wxUint32*)psz && (!buf || len < n))
+    {
+        wxUint16 cc[2];
+
+        size_t pa=encode_utf16(*(wxUint32*)psz, cc);
+        if (pa == (size_t)-1)
+            return pa;
+
+        if (buf)
+        {
+            *buf++ = cc[0];
+            if (pa > 1)
+                *buf++ = cc[1];
+        }
+        len += pa;
+        psz += sizeof(wxUint32);
+    }
+    if (buf && len<n)   *buf=0;
+
+    return len;
+}
+
+
+// copy 16bit String to 32bit MB
+size_t wxMBConvUTF32straight::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*psz && (!buf || len < n))
+    {
+        wxUint32 cc;
+
+        // cast is ok for WC_UTF16
+        size_t pa = decode_utf16((const wxUint16 *)psz, cc);
+        if (pa == (size_t)-1)
+            return pa;
+
+        if (buf)
+        {
+            *(wxUint32*)buf = cc;
+            buf += sizeof(wxUint32);
+        }
+        len += sizeof(wxUint32);
+        psz += pa;
+    }
+
+    if (buf && len<=n-sizeof(wxUint32))
+        *(wxUint32*)buf=0;
+
+    return len;
+}
+
+
+
+// swap 32bit MB to 16bit String
+size_t wxMBConvUTF32swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*(wxUint32*)psz && (!buf || len < n))
+    {
+        char tmp[4];
+        tmp[0] = psz[3];   tmp[1] = psz[2];
+        tmp[2] = psz[1];   tmp[3] = psz[0];
+
+
+        wxUint16 cc[2];
+
+        size_t pa=encode_utf16(*(wxUint32*)tmp, cc);
+        if (pa == (size_t)-1)
+            return pa;
+
+        if (buf)
+        {
+            *buf++ = cc[0];
+            if (pa > 1)
+                *buf++ = cc[1];
+        }
+        len += pa;
+        psz += sizeof(wxUint32);
+    }
+
+    if (buf && len<n)
+        *buf=0;
+
+    return len;
+}
+
+
+// swap 16bit String to 32bit MB
+size_t wxMBConvUTF32swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*psz && (!buf || len < n))
+    {
+        char cc[4];
+
+        // cast is ok for WC_UTF16
+        size_t pa=decode_utf16((const wxUint16 *)psz, *(wxUint32*)cc);
+        if (pa == (size_t)-1)
+            return pa;
+
+        if (buf)
+        {
+            *buf++ = cc[3];
+            *buf++ = cc[2];
+            *buf++ = cc[1];
+            *buf++ = cc[0];
+        }
+        len += sizeof(wxUint32);
+        psz += pa;
+    }
+
+    if (buf && len<=n-sizeof(wxUint32))
+        *(wxUint32*)buf=0;
+
+    return len;
+}
+
+#else // WC_UTF16
+
+
+// copy 32bit MB to 32bit String
+size_t wxMBConvUTF32straight::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*(wxUint32*)psz && (!buf || len < n))
+    {
+        if (buf)
+            *buf++ = *(wxUint32*)psz;
+        len++;
+        psz += sizeof(wxUint32);
+    }
+
+    if (buf && len<n)
+        *buf=0;
+
+    return len;
+}
+
+
+// copy 32bit String to 32bit MB
+size_t wxMBConvUTF32straight::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*psz && (!buf || len < n))
+    {
+        if (buf)
+        {
+            *(wxUint32*)buf = *psz;
+            buf += sizeof(wxUint32);
+        }
+
+        len += sizeof(wxUint32);
+        psz++;
+    }
+
+    if (buf && len<=n-sizeof(wxUint32))
+        *(wxUint32*)buf=0;
+
+    return len;
+}
+
+
+// swap 32bit MB to 32bit String
+size_t wxMBConvUTF32swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*(wxUint32*)psz && (!buf || len < n))
+    {
+        if (buf)
+        {
+            ((char *)buf)[0] = psz[3];
+            ((char *)buf)[1] = psz[2];
+            ((char *)buf)[2] = psz[1];
+            ((char *)buf)[3] = psz[0];
+            buf++;
+        }
+        len++;
+        psz += sizeof(wxUint32);
+    }
+
+    if (buf && len<n)
+        *buf=0;
+
+    return len;
+}
+
+
+// swap 32bit String to 32bit MB
+size_t wxMBConvUTF32swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
+{
+    size_t len=0;
+
+    while (*psz && (!buf || len < n))
+    {
+        if (buf)
+        {
+            *buf++ = ((char *)psz)[3];
+            *buf++ = ((char *)psz)[2];
+            *buf++ = ((char *)psz)[1];
+            *buf++ = ((char *)psz)[0];
+        }
+        len += sizeof(wxUint32);
+        psz++;
+    }
+
+    if (buf && len<=n-sizeof(wxUint32))
+        *(wxUint32*)buf=0;
+
+    return len;
+}
+
+
+#endif // WC_UTF16
+
+
+// ============================================================================
+// The classes doing conversion using the iconv_xxx() functions
+// ============================================================================
+
+#ifdef HAVE_ICONV
+
+// VS: glibc 2.1.3 is broken in that iconv() conversion to/from UCS4 fails with
+//     E2BIG if output buffer is _exactly_ as big as needed. Such case is
+//     (unless there's yet another bug in glibc) the only case when iconv()
+//     returns with (size_t)-1 (which means error) and says there are 0 bytes
+//     left in the input buffer -- when _real_ error occurs,
+//     bytes-left-in-input buffer is non-zero. Hence, this alternative test for
+//     iconv() failure.
+//     [This bug does not appear in glibc 2.2.]
+#if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ <= 1
+#define ICONV_FAILED(cres, bufLeft) ((cres == (size_t)-1) && \
+                                     (errno != E2BIG || bufLeft != 0))
+#else

 #define ICONV_FAILED(cres, bufLeft)  (cres == (size_t)-1)
 #endif
 
 #define ICONV_CHAR_CAST(x)  ((ICONV_CONST char **)(x))
 
 #define ICONV_FAILED(cres, bufLeft)  (cres == (size_t)-1)
 #endif
 
 #define ICONV_CHAR_CAST(x)  ((ICONV_CONST char **)(x))
 

+#define ICONV_T_INVALID ((iconv_t)-1)
+
+#if SIZEOF_WCHAR_T == 4
+    #define WC_BSWAP    wxUINT32_SWAP_ALWAYS
+    #define WC_ENC      wxFONTENCODING_UTF32
+#elif SIZEOF_WCHAR_T == 2
+    #define WC_BSWAP    wxUINT16_SWAP_ALWAYS
+    #define WC_ENC      wxFONTENCODING_UTF16
+#else // sizeof(wchar_t) != 2 nor 4
+    // does this ever happen?
+    #error "Unknown sizeof(wchar_t): please report this to wx-dev@lists.wxwindows.org"
+#endif
+

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// IC_CharSet: encapsulates an iconv character set
+// wxMBConv_iconv: encapsulates an iconv character set

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-class IC_CharSet : public wxCharacterSet
+class wxMBConv_iconv : public wxMBConv

 {
 public:
 {
 public:

-    IC_CharSet(const wxChar *name);
-    virtual ~IC_CharSet();
+    wxMBConv_iconv(const wxChar *name);
+    virtual ~wxMBConv_iconv();

 
 

-    virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n);
-    virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n);
+    virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const;
+    virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const;

 
 

-    bool usable() const
-        { return (m2w != (iconv_t)-1) && (w2m != (iconv_t)-1); }
+    bool IsOk() const
+        { return (m2w != ICONV_T_INVALID) && (w2m != ICONV_T_INVALID); }

 
 protected:
     // the iconv handlers used to translate from multibyte to wide char and in
     // the other direction
     iconv_t m2w,
             w2m;
 
 protected:
     // the iconv handlers used to translate from multibyte to wide char and in
     // the other direction
     iconv_t m2w,
             w2m;

+#if wxUSE_THREADS
+    // guards access to m2w and w2m objects
+    wxMutex m_iconvMutex;
+#endif

 
 private:
 
 private:

-    // the name (for iconv_open()) of a wide char charset - if none is
+    // the name (for iconv_open()) of a wide char charset -- if none is

     // available on this machine, it will remain NULL
     // available on this machine, it will remain NULL

-    static const char *ms_wcCharsetName;
+    static wxString ms_wcCharsetName;

 
     // true if the wide char encoding we use (i.e. ms_wcCharsetName) has
     // different endian-ness than the native one
     static bool ms_wcNeedsSwap;
 };
 
 
     // true if the wide char encoding we use (i.e. ms_wcCharsetName) has
     // different endian-ness than the native one
     static bool ms_wcNeedsSwap;
 };
 

-const char *IC_CharSet::ms_wcCharsetName = NULL;
-bool IC_CharSet::ms_wcNeedsSwap = FALSE;
+// make the constructor available for unit testing
+WXDLLIMPEXP_BASE wxMBConv* new_wxMBConv_iconv( const wxChar* name )
+{
+    wxMBConv_iconv* result = new wxMBConv_iconv( name );
+    if ( !result->IsOk() )
+    {
+        delete result;
+        return 0;
+    }
+    return result;
+}
+
+wxString wxMBConv_iconv::ms_wcCharsetName;
+bool wxMBConv_iconv::ms_wcNeedsSwap = false;

 
 

-IC_CharSet::IC_CharSet(const wxChar *name)
-          : wxCharacterSet(name)
+wxMBConv_iconv::wxMBConv_iconv(const wxChar *name)

 {
 {

-    // Do it the hard way
-    char cname[100];
-    for (size_t i = 0; i < wxStrlen(name)+1; i++)
-        cname[i] = (char) name[i];
+    // iconv operates with chars, not wxChars, but luckily it uses only ASCII
+    // names for the charsets
+    const wxCharBuffer cname(wxString(name).ToAscii());

 
     // check for charset that represents wchar_t:
 
     // check for charset that represents wchar_t:

-    if (ms_wcCharsetName == NULL)
+    if ( ms_wcCharsetName.empty() )

     {
     {

-        ms_wcNeedsSwap = FALSE;
+        wxLogTrace(TRACE_STRCONV, _T("Looking for wide char codeset:"));

 
 

-        // try charset with explicit bytesex info (e.g. "UCS-4LE"):
-        ms_wcCharsetName = WC_NAME_BEST;
-        m2w = iconv_open(ms_wcCharsetName, cname);
+#if wxUSE_FONTMAP
+        const wxChar **names = wxFontMapperBase::GetAllEncodingNames(WC_ENC);
+#else // !wxUSE_FONTMAP
+        static const wxChar *names[] =
+        {
+#if SIZEOF_WCHAR_T == 4
+            _T("UCS-4"),
+#elif SIZEOF_WCHAR_T = 2
+            _T("UCS-2"),
+#endif
+            NULL
+        };
+#endif // wxUSE_FONTMAP/!wxUSE_FONTMAP

 
 

-        if (m2w == (iconv_t)-1)
+        for ( ; *names && ms_wcCharsetName.empty(); ++names )

         {
         {

-            // try charset w/o bytesex info (e.g. "UCS4")
-            // and check for bytesex ourselves:
-            ms_wcCharsetName = WC_NAME;
-            m2w = iconv_open(ms_wcCharsetName, cname);
+            const wxString nameCS(*names);

 
 

-            // last bet, try if it knows WCHAR_T pseudo-charset
-            if (m2w == (iconv_t)-1)
-            {
-                ms_wcCharsetName = "WCHAR_T";
-                m2w = iconv_open(ms_wcCharsetName, cname);
-            }
+            // first try charset with explicit bytesex info (e.g. "UCS-4LE"):
+            wxString nameXE(nameCS);
+            #ifdef WORDS_BIGENDIAN
+                nameXE += _T("BE");
+            #else // little endian
+                nameXE += _T("LE");
+            #endif
+
+            wxLogTrace(TRACE_STRCONV, _T("  trying charset \"%s\""),
+                       nameXE.c_str());

 
 

-            if (m2w != (iconv_t)-1)
+            m2w = iconv_open(nameXE.ToAscii(), cname);
+            if ( m2w == ICONV_T_INVALID )

             {
             {

-                char    buf[2], *bufPtr;
-                wchar_t wbuf[2], *wbufPtr;
-                size_t  insz, outsz;
-                size_t  res;
-
-                buf[0] = 'A';
-                buf[1] = 0;
-                wbuf[0] = 0;
-                insz = 2;
-                outsz = SIZEOF_WCHAR_T * 2;
-                wbufPtr = wbuf;
-                bufPtr = buf;
-
-                res = iconv(m2w, ICONV_CHAR_CAST(&bufPtr), &insz,
-                            (char**)&wbufPtr, &outsz);
-
-                if (ICONV_FAILED(res, insz))
-                {
-                    ms_wcCharsetName = NULL;
-                    wxLogLastError(wxT("iconv"));
-                    wxLogError(_("Conversion to charset '%s' doesn't work."), name);
-                }
-                else
+                // try charset w/o bytesex info (e.g. "UCS4")
+                wxLogTrace(TRACE_STRCONV, _T("  trying charset \"%s\""),
+                           nameCS.c_str());
+                m2w = iconv_open(nameCS.ToAscii(), cname);
+
+                // and check for bytesex ourselves:
+                if ( m2w != ICONV_T_INVALID )

                 {
                 {

-                    ms_wcNeedsSwap = wbuf[0] != (wchar_t)buf[0];
+                    char    buf[2], *bufPtr;
+                    wchar_t wbuf[2], *wbufPtr;
+                    size_t  insz, outsz;
+                    size_t  res;
+
+                    buf[0] = 'A';
+                    buf[1] = 0;
+                    wbuf[0] = 0;
+                    insz = 2;
+                    outsz = SIZEOF_WCHAR_T * 2;
+                    wbufPtr = wbuf;
+                    bufPtr = buf;
+
+                    res = iconv(m2w, ICONV_CHAR_CAST(&bufPtr), &insz,
+                                (char**)&wbufPtr, &outsz);
+
+                    if (ICONV_FAILED(res, insz))
+                    {
+                        wxLogLastError(wxT("iconv"));
+                        wxLogError(_("Conversion to charset '%s' doesn't work."),
+                                   nameCS.c_str());
+                    }
+                    else // ok, can convert to this encoding, remember it
+                    {
+                        ms_wcCharsetName = nameCS;
+                        ms_wcNeedsSwap = wbuf[0] != (wchar_t)buf[0];
+                    }

                 }
             }
                 }
             }

-            else
+            else // use charset not requiring byte swapping

             {
             {

-                ms_wcCharsetName = NULL;
-
-                // VS: we must not output an error here, since wxWindows will safely
-                //     fall back to using wxEncodingConverter.
-                wxLogTrace(wxT("strconv"), wxT("Impossible to convert to/from charset '%s' with iconv, falling back to wxEncodingConverter."), name);
-                //wxLogError(
+                ms_wcCharsetName = nameXE;

             }
         }
             }
         }

-        wxLogTrace(wxT("strconv"), wxT("wchar_t charset is '%s', needs swap: %i"), ms_wcCharsetName, ms_wcNeedsSwap);
+
+        wxLogTrace(TRACE_STRCONV,
+                   wxT("iconv wchar_t charset is \"%s\"%s"),
+                   ms_wcCharsetName.empty() ? _T("<none>")
+                                            : ms_wcCharsetName.c_str(),
+                   ms_wcNeedsSwap ? _T(" (needs swap)")
+                                  : _T(""));

     }
     else // we already have ms_wcCharsetName
     {
     }
     else // we already have ms_wcCharsetName
     {

-        m2w = iconv_open(ms_wcCharsetName, cname);
+        m2w = iconv_open(ms_wcCharsetName.ToAscii(), cname);

     }
 
     }
 

-    // NB: don't ever pass NULL to iconv_open(), it may crash!
-    if ( ms_wcCharsetName )
+    if ( ms_wcCharsetName.empty() )

     {
     {

-        w2m = iconv_open( cname, ms_wcCharsetName);
+        w2m = ICONV_T_INVALID;

     }
     else
     {
     }
     else
     {

-        w2m = (iconv_t)-1;
+        w2m = iconv_open(cname, ms_wcCharsetName.ToAscii());
+        if ( w2m == ICONV_T_INVALID )
+        {
+            wxLogTrace(TRACE_STRCONV,
+                       wxT("\"%s\" -> \"%s\" works but not the converse!?"),
+                       ms_wcCharsetName.c_str(), cname.data());
+        }

     }
 }
 
     }
 }
 

-IC_CharSet::~IC_CharSet()
+wxMBConv_iconv::~wxMBConv_iconv()

 {
 {

-    if ( m2w != (iconv_t)-1 )
+    if ( m2w != ICONV_T_INVALID )

         iconv_close(m2w);
         iconv_close(m2w);

-    if ( w2m != (iconv_t)-1 )
+    if ( w2m != ICONV_T_INVALID )

         iconv_close(w2m);
 }
 
         iconv_close(w2m);
 }
 

-size_t IC_CharSet::MB2WC(wchar_t *buf, const char *psz, size_t n)
+size_t wxMBConv_iconv::MB2WC(wchar_t *buf, const char *psz, size_t n) const

 {
 {

+#if wxUSE_THREADS
+    // NB: iconv() is MT-safe, but each thread must use it's own iconv_t handle.
+    //     Unfortunately there is a couple of global wxCSConv objects such as
+    //     wxConvLocal that are used all over wx code, so we have to make sure
+    //     the handle is used by at most one thread at the time. Otherwise
+    //     only a few wx classes would be safe to use from non-main threads
+    //     as MB<->WC conversion would fail "randomly".
+    wxMutexLocker lock(wxConstCast(this, wxMBConv_iconv)->m_iconvMutex);
+#endif
+

     size_t inbuf = strlen(psz);
     size_t outbuf = n * SIZEOF_WCHAR_T;
     size_t res, cres;
     size_t inbuf = strlen(psz);
     size_t outbuf = n * SIZEOF_WCHAR_T;
     size_t res, cres;


@@ -638,7 +1492,8 @@ size_t IC_CharSet::MB2WC(wchar_t *buf, const char *psz, size_t n)
         if (ms_wcNeedsSwap)
         {
             // convert to native endianness
         if (ms_wcNeedsSwap)
         {
             // convert to native endianness

-            WC_BSWAP(buf /* _not_ bufPtr */, res)
+            for ( unsigned i = 0; i < res; i++ )
+                buf[n] = WC_BSWAP(buf[i]);

         }
 
         // NB: iconv was given only strlen(psz) characters on input, and so
         }
 
         // NB: iconv was given only strlen(psz) characters on input, and so


@@ -668,16 +1523,22 @@ size_t IC_CharSet::MB2WC(wchar_t *buf, const char *psz, size_t n)
     if (ICONV_FAILED(cres, inbuf))
     {
         //VS: it is ok if iconv fails, hence trace only
     if (ICONV_FAILED(cres, inbuf))
     {
         //VS: it is ok if iconv fails, hence trace only

-        wxLogTrace(wxT("strconv"), wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
+        wxLogTrace(TRACE_STRCONV, wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));

         return (size_t)-1;
     }
 
     return res;
 }
 
         return (size_t)-1;
     }
 
     return res;
 }
 

-size_t IC_CharSet::WC2MB(char *buf, const wchar_t *psz, size_t n)
+size_t wxMBConv_iconv::WC2MB(char *buf, const wchar_t *psz, size_t n) const

 {
 {

-    size_t inbuf = wxWcslen(psz) * SIZEOF_WCHAR_T;
+#if wxUSE_THREADS
+    // NB: explained in MB2WC
+    wxMutexLocker lock(wxConstCast(this, wxMBConv_iconv)->m_iconvMutex);
+#endif
+
+    size_t inlen = wxWcslen(psz);
+    size_t inbuf = inlen * SIZEOF_WCHAR_T;

     size_t outbuf = n;
     size_t res, cres;
 
     size_t outbuf = n;
     size_t res, cres;
 


@@ -686,13 +1547,13 @@ size_t IC_CharSet::WC2MB(char *buf, const wchar_t *psz, size_t n)
     if (ms_wcNeedsSwap)
     {
         // need to copy to temp buffer to switch endianness
     if (ms_wcNeedsSwap)
     {
         // need to copy to temp buffer to switch endianness

-        // this absolutely doesn't rock!
-        // (no, doing WC_BSWAP twice on the original buffer won't help, as it
+        // (doing WC_BSWAP twice on the original buffer won't help, as it

         //  could be in read-only memory, or be accessed in some other thread)
         //  could be in read-only memory, or be accessed in some other thread)

-        tmpbuf=(wchar_t*)malloc((inbuf+1)*SIZEOF_WCHAR_T);
-        memcpy(tmpbuf,psz,(inbuf+1)*SIZEOF_WCHAR_T);
-        WC_BSWAP(tmpbuf, inbuf)
-        psz=tmpbuf;
+        tmpbuf = (wchar_t *)malloc(inbuf + SIZEOF_WCHAR_T);
+        for ( size_t i = 0; i < inlen; i++ )
+            tmpbuf[n] = WC_BSWAP(psz[i]);
+        tmpbuf[inlen] = L'\0';
+        psz = tmpbuf;

     }
 
     if (buf)
     }
 
     if (buf)


@@ -719,86 +1580,779 @@ size_t IC_CharSet::WC2MB(char *buf, const wchar_t *psz, size_t n)
 
             cres = iconv( w2m, ICONV_CHAR_CAST(&psz), &inbuf, &buf, &outbuf );
 
 
             cres = iconv( w2m, ICONV_CHAR_CAST(&psz), &inbuf, &buf, &outbuf );
 

-            res += 16 - outbuf;
-        } while ((cres==(size_t)-1) && (errno==E2BIG));
+            res += 16 - outbuf;
+        } while ((cres==(size_t)-1) && (errno==E2BIG));
+    }
+
+    if (ms_wcNeedsSwap)
+    {
+        free(tmpbuf);
+    }
+
+    if (ICONV_FAILED(cres, inbuf))
+    {
+        wxLogTrace(TRACE_STRCONV, wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
+        return (size_t)-1;
+    }
+
+    return res;
+}
+
+#endif // HAVE_ICONV
+
+
+// ============================================================================
+// Win32 conversion classes
+// ============================================================================
+
+#ifdef wxHAVE_WIN32_MB2WC
+
+// from utils.cpp
+#if wxUSE_FONTMAP
+extern WXDLLIMPEXP_BASE long wxCharsetToCodepage(const wxChar *charset);
+extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding);
+#endif
+
+class wxMBConv_win32 : public wxMBConv
+{
+public:
+    wxMBConv_win32()
+    {
+        m_CodePage = CP_ACP;
+    }
+
+#if wxUSE_FONTMAP
+    wxMBConv_win32(const wxChar* name)
+    {
+        m_CodePage = wxCharsetToCodepage(name);
+    }
+
+    wxMBConv_win32(wxFontEncoding encoding)
+    {
+        m_CodePage = wxEncodingToCodepage(encoding);
+    }
+#endif
+
+    size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const
+    {
+        // note that we have to use MB_ERR_INVALID_CHARS flag as it without it
+        // the behaviour is not compatible with the Unix version (using iconv)
+        // and break the library itself, e.g. wxTextInputStream::NextChar()
+        // wouldn't work if reading an incomplete MB char didn't result in an
+        // error
+        //
+        // note however that using MB_ERR_INVALID_CHARS with CP_UTF7 results in
+        // an error (tested under Windows Server 2003) and apparently it is
+        // done on purpose, i.e. the function accepts any input in this case
+        // and although I'd prefer to return error on ill-formed output, our
+        // own wxMBConvUTF7 doesn't detect errors (e.g. lone "+" which is
+        // explicitly ill-formed according to RFC 2152) neither so we don't
+        // even have any fallback here...
+        int flags = m_CodePage == CP_UTF7 ? 0 : MB_ERR_INVALID_CHARS;
+
+        const size_t len = ::MultiByteToWideChar
+                             (
+                                m_CodePage,     // code page
+                                flags,          // flags: fall on error
+                                psz,            // input string
+                                -1,             // its length (NUL-terminated)
+                                buf,            // output string
+                                buf ? n : 0     // size of output buffer
+                             );
+
+        // note that it returns count of written chars for buf != NULL and size
+        // of the needed buffer for buf == NULL so in either case the length of
+        // the string (which never includes the terminating NUL) is one less
+        return len ? len - 1 : (size_t)-1;
+    }
+
+    size_t WC2MB(char *buf, const wchar_t *pwz, size_t n) const
+    {
+        /*
+            we have a problem here: by default, WideCharToMultiByte() may
+            replace characters unrepresentable in the target code page with bad
+            quality approximations such as turning "1/2" symbol (U+00BD) into
+            "1" for the code pages which don't have it and we, obviously, want
+            to avoid this at any price
+
+            the trouble is that this function does it _silently_, i.e. it won't
+            even tell us whether it did or not... Win98/2000 and higher provide
+            WC_NO_BEST_FIT_CHARS but it doesn't work for the older systems and
+            we have to resort to a round trip, i.e. check that converting back
+            results in the same string -- this is, of course, expensive but
+            otherwise we simply can't be sure to not garble the data.
+         */
+
+        // determine if we can rely on WC_NO_BEST_FIT_CHARS: according to MSDN
+        // it doesn't work with CJK encodings (which we test for rather roughly
+        // here...) nor with UTF-7/8 nor, of course, with Windows versions not
+        // supporting it
+        BOOL usedDef wxDUMMY_INITIALIZE(false);
+        BOOL *pUsedDef;
+        int flags;
+        if ( CanUseNoBestFit() && m_CodePage < 50000 )
+        {
+            // it's our lucky day
+            flags = WC_NO_BEST_FIT_CHARS;
+            pUsedDef = &usedDef;
+        }
+        else // old system or unsupported encoding
+        {
+            flags = 0;
+            pUsedDef = NULL;
+        }
+
+        const size_t len = ::WideCharToMultiByte
+                             (
+                                m_CodePage,     // code page
+                                flags,          // either none or no best fit
+                                pwz,            // input string
+                                -1,             // it is (wide) NUL-terminated
+                                buf,            // output buffer
+                                buf ? n : 0,    // and its size
+                                NULL,           // default "replacement" char
+                                pUsedDef        // [out] was it used?
+                             );
+
+        if ( !len )
+        {
+            // function totally failed
+            return (size_t)-1;
+        }
+
+        // if we were really converting, check if we succeeded
+        if ( buf )
+        {
+            if ( flags )
+            {
+                // check if the conversion failed, i.e. if any replacements
+                // were done
+                if ( usedDef )
+                    return (size_t)-1;
+            }
+            else // we must resort to double tripping...
+            {
+                wxWCharBuffer wcBuf(n);
+                if ( MB2WC(wcBuf.data(), buf, n) == (size_t)-1 ||
+                        wcscmp(wcBuf, pwz) != 0 )
+                {
+                    // we didn't obtain the same thing we started from, hence
+                    // the conversion was lossy and we consider that it failed
+                    return (size_t)-1;
+                }
+            }
+        }
+
+        // see the comment above for the reason of "len - 1"
+        return len - 1;
+    }
+
+    bool IsOk() const { return m_CodePage != -1; }
+
+private:
+    static bool CanUseNoBestFit()
+    {
+        static int s_isWin98Or2k = -1;
+
+        if ( s_isWin98Or2k == -1 )
+        {
+            int verMaj, verMin;
+            switch ( wxGetOsVersion(&verMaj, &verMin) )
+            {
+                case wxWIN95:
+                    s_isWin98Or2k = verMaj >= 4 && verMin >= 10;
+                    break;
+
+                case wxWINDOWS_NT:
+                    s_isWin98Or2k = verMaj >= 5;
+                    break;
+
+                default:
+                    // unknown, be conseravtive by default
+                    s_isWin98Or2k = 0;
+            }
+
+            wxASSERT_MSG( s_isWin98Or2k != -1, _T("should be set above") );
+        }
+
+        return s_isWin98Or2k == 1;
+    }
+
+    long m_CodePage;
+};
+
+#endif // wxHAVE_WIN32_MB2WC
+
+// ============================================================================
+// Cocoa conversion classes
+// ============================================================================
+
+#if defined(__WXCOCOA__)
+
+// RN:  There is no UTF-32 support in either Core Foundation or
+// Cocoa.  Strangely enough, internally Core Foundation uses
+// UTF 32 internally quite a bit - its just not public (yet).
+
+#include <CoreFoundation/CFString.h>
+#include <CoreFoundation/CFStringEncodingExt.h>
+
+CFStringEncoding wxCFStringEncFromFontEnc(wxFontEncoding encoding)
+{
+    CFStringEncoding enc = kCFStringEncodingInvalidId ;
+    if ( encoding == wxFONTENCODING_DEFAULT )
+    {
+        enc = CFStringGetSystemEncoding();
+    }
+    else switch( encoding)
+    {
+        case wxFONTENCODING_ISO8859_1 :
+            enc = kCFStringEncodingISOLatin1 ;
+            break ;
+        case wxFONTENCODING_ISO8859_2 :
+            enc = kCFStringEncodingISOLatin2;
+            break ;
+        case wxFONTENCODING_ISO8859_3 :
+            enc = kCFStringEncodingISOLatin3 ;
+            break ;
+        case wxFONTENCODING_ISO8859_4 :
+            enc = kCFStringEncodingISOLatin4;
+            break ;
+        case wxFONTENCODING_ISO8859_5 :
+            enc = kCFStringEncodingISOLatinCyrillic;
+            break ;
+        case wxFONTENCODING_ISO8859_6 :
+            enc = kCFStringEncodingISOLatinArabic;
+            break ;
+        case wxFONTENCODING_ISO8859_7 :
+            enc = kCFStringEncodingISOLatinGreek;
+            break ;
+        case wxFONTENCODING_ISO8859_8 :
+            enc = kCFStringEncodingISOLatinHebrew;
+            break ;
+        case wxFONTENCODING_ISO8859_9 :
+            enc = kCFStringEncodingISOLatin5;
+            break ;
+        case wxFONTENCODING_ISO8859_10 :
+            enc = kCFStringEncodingISOLatin6;
+            break ;
+        case wxFONTENCODING_ISO8859_11 :
+            enc = kCFStringEncodingISOLatinThai;
+            break ;
+        case wxFONTENCODING_ISO8859_13 :
+            enc = kCFStringEncodingISOLatin7;
+            break ;
+        case wxFONTENCODING_ISO8859_14 :
+            enc = kCFStringEncodingISOLatin8;
+            break ;
+        case wxFONTENCODING_ISO8859_15 :
+            enc = kCFStringEncodingISOLatin9;
+            break ;
+
+        case wxFONTENCODING_KOI8 :
+            enc = kCFStringEncodingKOI8_R;
+            break ;
+        case wxFONTENCODING_ALTERNATIVE : // MS-DOS CP866
+            enc = kCFStringEncodingDOSRussian;
+            break ;
+
+//      case wxFONTENCODING_BULGARIAN :
+//          enc = ;
+//          break ;
+
+        case wxFONTENCODING_CP437 :
+            enc =kCFStringEncodingDOSLatinUS ;
+            break ;
+        case wxFONTENCODING_CP850 :
+            enc = kCFStringEncodingDOSLatin1;
+            break ;
+        case wxFONTENCODING_CP852 :
+            enc = kCFStringEncodingDOSLatin2;
+            break ;
+        case wxFONTENCODING_CP855 :
+            enc = kCFStringEncodingDOSCyrillic;
+            break ;
+        case wxFONTENCODING_CP866 :
+            enc =kCFStringEncodingDOSRussian ;
+            break ;
+        case wxFONTENCODING_CP874 :
+            enc = kCFStringEncodingDOSThai;
+            break ;
+        case wxFONTENCODING_CP932 :
+            enc = kCFStringEncodingDOSJapanese;
+            break ;
+        case wxFONTENCODING_CP936 :
+            enc =kCFStringEncodingDOSChineseSimplif ;
+            break ;
+        case wxFONTENCODING_CP949 :
+            enc = kCFStringEncodingDOSKorean;
+            break ;
+        case wxFONTENCODING_CP950 :
+            enc = kCFStringEncodingDOSChineseTrad;
+            break ;
+        case wxFONTENCODING_CP1250 :
+            enc = kCFStringEncodingWindowsLatin2;
+            break ;
+        case wxFONTENCODING_CP1251 :
+            enc =kCFStringEncodingWindowsCyrillic ;
+            break ;
+        case wxFONTENCODING_CP1252 :
+            enc =kCFStringEncodingWindowsLatin1 ;
+            break ;
+        case wxFONTENCODING_CP1253 :
+            enc = kCFStringEncodingWindowsGreek;
+            break ;
+        case wxFONTENCODING_CP1254 :
+            enc = kCFStringEncodingWindowsLatin5;
+            break ;
+        case wxFONTENCODING_CP1255 :
+            enc =kCFStringEncodingWindowsHebrew ;
+            break ;
+        case wxFONTENCODING_CP1256 :
+            enc =kCFStringEncodingWindowsArabic ;
+            break ;
+        case wxFONTENCODING_CP1257 :
+            enc = kCFStringEncodingWindowsBalticRim;
+            break ;
+//   This only really encodes to UTF7 (if that) evidently
+//        case wxFONTENCODING_UTF7 :
+//            enc = kCFStringEncodingNonLossyASCII ;
+//            break ;
+        case wxFONTENCODING_UTF8 :
+            enc = kCFStringEncodingUTF8 ;
+            break ;
+        case wxFONTENCODING_EUC_JP :
+            enc = kCFStringEncodingEUC_JP;
+            break ;
+        case wxFONTENCODING_UTF16 :
+            enc = kCFStringEncodingUnicode ;
+            break ;
+        case wxFONTENCODING_MACROMAN :
+            enc = kCFStringEncodingMacRoman ;
+            break ;
+        case wxFONTENCODING_MACJAPANESE :
+            enc = kCFStringEncodingMacJapanese ;
+            break ;
+        case wxFONTENCODING_MACCHINESETRAD :
+            enc = kCFStringEncodingMacChineseTrad ;
+            break ;
+        case wxFONTENCODING_MACKOREAN :
+            enc = kCFStringEncodingMacKorean ;
+            break ;
+        case wxFONTENCODING_MACARABIC :
+            enc = kCFStringEncodingMacArabic ;
+            break ;
+        case wxFONTENCODING_MACHEBREW :
+            enc = kCFStringEncodingMacHebrew ;
+            break ;
+        case wxFONTENCODING_MACGREEK :
+            enc = kCFStringEncodingMacGreek ;
+            break ;
+        case wxFONTENCODING_MACCYRILLIC :
+            enc = kCFStringEncodingMacCyrillic ;
+            break ;
+        case wxFONTENCODING_MACDEVANAGARI :
+            enc = kCFStringEncodingMacDevanagari ;
+            break ;
+        case wxFONTENCODING_MACGURMUKHI :
+            enc = kCFStringEncodingMacGurmukhi ;
+            break ;
+        case wxFONTENCODING_MACGUJARATI :
+            enc = kCFStringEncodingMacGujarati ;
+            break ;
+        case wxFONTENCODING_MACORIYA :
+            enc = kCFStringEncodingMacOriya ;
+            break ;
+        case wxFONTENCODING_MACBENGALI :
+            enc = kCFStringEncodingMacBengali ;
+            break ;
+        case wxFONTENCODING_MACTAMIL :
+            enc = kCFStringEncodingMacTamil ;
+            break ;
+        case wxFONTENCODING_MACTELUGU :
+            enc = kCFStringEncodingMacTelugu ;
+            break ;
+        case wxFONTENCODING_MACKANNADA :
+            enc = kCFStringEncodingMacKannada ;
+            break ;
+        case wxFONTENCODING_MACMALAJALAM :
+            enc = kCFStringEncodingMacMalayalam ;
+            break ;
+        case wxFONTENCODING_MACSINHALESE :
+            enc = kCFStringEncodingMacSinhalese ;
+            break ;
+        case wxFONTENCODING_MACBURMESE :
+            enc = kCFStringEncodingMacBurmese ;
+            break ;
+        case wxFONTENCODING_MACKHMER :
+            enc = kCFStringEncodingMacKhmer ;
+            break ;
+        case wxFONTENCODING_MACTHAI :
+            enc = kCFStringEncodingMacThai ;
+            break ;
+        case wxFONTENCODING_MACLAOTIAN :
+            enc = kCFStringEncodingMacLaotian ;
+            break ;
+        case wxFONTENCODING_MACGEORGIAN :
+            enc = kCFStringEncodingMacGeorgian ;
+            break ;
+        case wxFONTENCODING_MACARMENIAN :
+            enc = kCFStringEncodingMacArmenian ;
+            break ;
+        case wxFONTENCODING_MACCHINESESIMP :
+            enc = kCFStringEncodingMacChineseSimp ;
+            break ;
+        case wxFONTENCODING_MACTIBETAN :
+            enc = kCFStringEncodingMacTibetan ;
+            break ;
+        case wxFONTENCODING_MACMONGOLIAN :
+            enc = kCFStringEncodingMacMongolian ;
+            break ;
+        case wxFONTENCODING_MACETHIOPIC :
+            enc = kCFStringEncodingMacEthiopic ;
+            break ;
+        case wxFONTENCODING_MACCENTRALEUR :
+            enc = kCFStringEncodingMacCentralEurRoman ;
+            break ;
+        case wxFONTENCODING_MACVIATNAMESE :
+            enc = kCFStringEncodingMacVietnamese ;
+            break ;
+        case wxFONTENCODING_MACARABICEXT :
+            enc = kCFStringEncodingMacExtArabic ;
+            break ;
+        case wxFONTENCODING_MACSYMBOL :
+            enc = kCFStringEncodingMacSymbol ;
+            break ;
+        case wxFONTENCODING_MACDINGBATS :
+            enc = kCFStringEncodingMacDingbats ;
+            break ;
+        case wxFONTENCODING_MACTURKISH :
+            enc = kCFStringEncodingMacTurkish ;
+            break ;
+        case wxFONTENCODING_MACCROATIAN :
+            enc = kCFStringEncodingMacCroatian ;
+            break ;
+        case wxFONTENCODING_MACICELANDIC :
+            enc = kCFStringEncodingMacIcelandic ;
+            break ;
+        case wxFONTENCODING_MACROMANIAN :
+            enc = kCFStringEncodingMacRomanian ;
+            break ;
+        case wxFONTENCODING_MACCELTIC :
+            enc = kCFStringEncodingMacCeltic ;
+            break ;
+        case wxFONTENCODING_MACGAELIC :
+            enc = kCFStringEncodingMacGaelic ;
+            break ;
+//      case wxFONTENCODING_MACKEYBOARD :
+//          enc = kCFStringEncodingMacKeyboardGlyphs ;
+//          break ;
+        default :
+            // because gcc is picky
+            break ;
+    } ;
+    return enc ;
+}
+
+class wxMBConv_cocoa : public wxMBConv
+{
+public:
+    wxMBConv_cocoa()
+    {
+        Init(CFStringGetSystemEncoding()) ;
+    }
+
+#if wxUSE_FONTMAP
+    wxMBConv_cocoa(const wxChar* name)
+    {
+        Init( wxCFStringEncFromFontEnc(wxFontMapperBase::Get()->CharsetToEncoding(name, false) ) ) ;
+    }
+#endif
+
+    wxMBConv_cocoa(wxFontEncoding encoding)
+    {
+        Init( wxCFStringEncFromFontEnc(encoding) );
+    }
+
+    ~wxMBConv_cocoa()
+    {
+    }
+
+    void Init( CFStringEncoding encoding)
+    {
+        m_encoding = encoding ;
+    }
+
+    size_t MB2WC(wchar_t * szOut, const char * szUnConv, size_t nOutSize) const
+    {
+        wxASSERT(szUnConv);
+
+        CFStringRef theString = CFStringCreateWithBytes (
+                                                NULL, //the allocator
+                                                (const UInt8*)szUnConv,
+                                                strlen(szUnConv),
+                                                m_encoding,
+                                                false //no BOM/external representation
+                                                );
+
+        wxASSERT(theString);
+
+        size_t nOutLength = CFStringGetLength(theString);
+
+        if (szOut == NULL)
+        {
+            CFRelease(theString);
+            return nOutLength;
+        }
+
+        CFRange theRange = { 0, nOutSize };
+
+#if SIZEOF_WCHAR_T == 4
+        UniChar* szUniCharBuffer = new UniChar[nOutSize];
+#endif
+
+        CFStringGetCharacters(theString, theRange, szUniCharBuffer);
+
+        CFRelease(theString);
+
+        szUniCharBuffer[nOutLength] = '\0' ;
+
+#if SIZEOF_WCHAR_T == 4
+        wxMBConvUTF16 converter ;
+        converter.MB2WC(szOut, (const char*)szUniCharBuffer , nOutSize ) ;
+        delete[] szUniCharBuffer;
+#endif
+
+        return nOutLength;
+    }
+
+    size_t WC2MB(char *szOut, const wchar_t *szUnConv, size_t nOutSize) const
+    {
+        wxASSERT(szUnConv);
+
+        size_t nRealOutSize;
+        size_t nBufSize = wxWcslen(szUnConv);
+        UniChar* szUniBuffer = (UniChar*) szUnConv;
+
+#if SIZEOF_WCHAR_T == 4
+        wxMBConvUTF16 converter ;
+        nBufSize = converter.WC2MB( NULL , szUnConv , 0 );
+        szUniBuffer = new UniChar[ (nBufSize / sizeof(UniChar)) + 1] ;
+        converter.WC2MB( (char*) szUniBuffer , szUnConv, nBufSize + sizeof(UniChar)) ;
+        nBufSize /= sizeof(UniChar);
+#endif
+
+        CFStringRef theString = CFStringCreateWithCharactersNoCopy(
+                                NULL, //allocator
+                                szUniBuffer,
+                                nBufSize,
+                                kCFAllocatorNull //deallocator - we want to deallocate it ourselves
+                            );
+
+        wxASSERT(theString);
+
+        //Note that CER puts a BOM when converting to unicode
+        //so we  check and use getchars instead in that case
+        if (m_encoding == kCFStringEncodingUnicode)
+        {
+            if (szOut != NULL)
+                CFStringGetCharacters(theString, CFRangeMake(0, nOutSize - 1), (UniChar*) szOut);
+
+            nRealOutSize = CFStringGetLength(theString) + 1;
+        }
+        else
+        {
+            CFStringGetBytes(
+                theString,
+                CFRangeMake(0, CFStringGetLength(theString)),
+                m_encoding,
+                0, //what to put in characters that can't be converted -
+                    //0 tells CFString to return NULL if it meets such a character
+                false, //not an external representation
+                (UInt8*) szOut,
+                nOutSize,
+                (CFIndex*) &nRealOutSize
+                        );
+        }
+
+        CFRelease(theString);
+
+#if SIZEOF_WCHAR_T == 4
+        delete[] szUniBuffer;
+#endif
+
+        return  nRealOutSize - 1;
+    }
+
+    bool IsOk() const
+    {
+        return m_encoding != kCFStringEncodingInvalidId &&
+              CFStringIsEncodingAvailable(m_encoding);
+    }
+
+private:
+    CFStringEncoding m_encoding ;
+};
+
+#endif // defined(__WXCOCOA__)
+
+// ============================================================================
+// Mac conversion classes
+// ============================================================================
+
+#if defined(__WXMAC__) && defined(TARGET_CARBON)
+
+class wxMBConv_mac : public wxMBConv
+{
+public:
+    wxMBConv_mac()
+    {
+        Init(CFStringGetSystemEncoding()) ;
+    }
+
+#if wxUSE_FONTMAP
+    wxMBConv_mac(const wxChar* name)
+    {
+        Init( wxMacGetSystemEncFromFontEnc(wxFontMapperBase::Get()->CharsetToEncoding(name, false) ) ) ;
+    }
+#endif
+
+    wxMBConv_mac(wxFontEncoding encoding)
+    {
+        Init( wxMacGetSystemEncFromFontEnc(encoding) );

     }
 
     }
 

-    if (ms_wcNeedsSwap)
+    ~wxMBConv_mac()

     {
     {

-        free(tmpbuf);
+        OSStatus status = noErr ;
+        status = TECDisposeConverter(m_MB2WC_converter);
+        status = TECDisposeConverter(m_WC2MB_converter);

     }
 
     }
 

-    if (ICONV_FAILED(cres, inbuf))
+
+    void Init( TextEncodingBase encoding)

     {
     {

-        //VS: it is ok if iconv fails, hence trace only
-        wxLogTrace(wxT("strconv"), wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
-        return (size_t)-1;
+        OSStatus status = noErr ;
+        m_char_encoding = encoding ;
+        m_unicode_encoding = CreateTextEncoding(kTextEncodingUnicodeDefault,0,kUnicode16BitFormat) ;
+
+        status = TECCreateConverter(&m_MB2WC_converter,
+                                    m_char_encoding,
+                                    m_unicode_encoding);
+        status = TECCreateConverter(&m_WC2MB_converter,
+                                    m_unicode_encoding,
+                                    m_char_encoding);

     }
 
     }
 

-    return res;
-}
+    size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const
+    {
+        OSStatus status = noErr ;
+        ByteCount byteOutLen ;
+        ByteCount byteInLen = strlen(psz) ;
+        wchar_t *tbuf = NULL ;
+        UniChar* ubuf = NULL ;
+        size_t res = 0 ;
+
+        if (buf == NULL)
+        {
+            //apple specs say at least 32
+            n = wxMax( 32 , byteInLen ) ;
+            tbuf = (wchar_t*) malloc( n * SIZEOF_WCHAR_T) ;
+        }
+        ByteCount byteBufferLen = n * sizeof( UniChar ) ;
+#if SIZEOF_WCHAR_T == 4
+        ubuf = (UniChar*) malloc( byteBufferLen + 2 ) ;
+#else
+        ubuf = (UniChar*) (buf ? buf : tbuf) ;
+#endif
+        status = TECConvertText(m_MB2WC_converter, (ConstTextPtr) psz , byteInLen, &byteInLen,
+          (TextPtr) ubuf , byteBufferLen, &byteOutLen);
+#if SIZEOF_WCHAR_T == 4
+        // we have to terminate here, because n might be larger for the trailing zero, and if UniChar
+        // is not properly terminated we get random characters at the end
+        ubuf[byteOutLen / sizeof( UniChar ) ] = 0 ;
+        wxMBConvUTF16 converter ;
+        res = converter.MB2WC( (buf ? buf : tbuf) , (const char*)ubuf , n ) ;
+        free( ubuf ) ;
+#else
+        res = byteOutLen / sizeof( UniChar ) ;
+#endif
+        if ( buf == NULL )
+             free(tbuf) ;

 
 

-#endif // HAVE_ICONV
+        if ( buf  && res < n)
+            buf[res] = 0;

 
 

-// ============================================================================
-// Win32 conversion classes
-// ============================================================================
+        return res ;
+    }

 
 

-#if defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXUNIVERSAL__)
+    size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const
+    {
+        OSStatus status = noErr ;
+        ByteCount byteOutLen ;
+        ByteCount byteInLen = wxWcslen(psz) * SIZEOF_WCHAR_T ;

 
 

-extern long wxCharsetToCodepage(const wxChar *charset); // from utils.cpp
+        char *tbuf = NULL ;

 
 

-class CP_CharSet : public wxCharacterSet
-{
-public:
-    CP_CharSet(const wxChar* name)
-        : wxCharacterSet(name)
+        if (buf == NULL)

         {
         {

-            m_CodePage = wxCharsetToCodepage(name);
+            //apple specs say at least 32
+            n = wxMax( 32 , ((byteInLen / SIZEOF_WCHAR_T) * 8) + SIZEOF_WCHAR_T );
+            tbuf = (char*) malloc( n ) ;

         }
 
         }
 

-    size_t MB2WC(wchar_t *buf, const char *psz, size_t n)
-    {
-        const size_t len = ::MultiByteToWideChar
-                             (
-                                m_CodePage,     // code page
-                                0,              // flags (none)
-                                psz,            // input string
-                                -1,             // its length (NUL-terminated)
-                                buf,            // output string
-                                buf ? n : 0     // size of output buffer
-                             );
+        ByteCount byteBufferLen = n ;
+        UniChar* ubuf = NULL ;
+#if SIZEOF_WCHAR_T == 4
+        wxMBConvUTF16 converter ;
+        size_t unicharlen = converter.WC2MB( NULL , psz , 0 ) ;
+        byteInLen = unicharlen ;
+        ubuf = (UniChar*) malloc( byteInLen + 2 ) ;
+        converter.WC2MB( (char*) ubuf , psz, unicharlen + 2 ) ;
+#else
+        ubuf = (UniChar*) psz ;
+#endif
+        status = TECConvertText(m_WC2MB_converter, (ConstTextPtr) ubuf , byteInLen, &byteInLen,
+            (TextPtr) (buf ? buf : tbuf) , byteBufferLen, &byteOutLen);
+#if SIZEOF_WCHAR_T == 4
+        free( ubuf ) ;
+#endif
+        if ( buf == NULL )
+            free(tbuf) ;

 
 

-        // note that it returns # of written chars for buf != NULL and *size*
-        // of the needed buffer for buf == NULL
-        return len ? (buf ? len : len - 1) : (size_t)-1;
-    }
+        size_t res = byteOutLen ;
+        if ( buf  && res < n)
+        {
+            buf[res] = 0;

 
 

-    size_t WC2MB(char *buf, const wchar_t *psz, size_t n)
-    {
-        const size_t len = ::WideCharToMultiByte
-                             (
-                                m_CodePage,     // code page
-                                0,              // flags (none)
-                                psz,            // input string
-                                -1,             // it is (wide) NUL-terminated
-                                buf,            // output buffer
-                                buf ? n : 0,    // and its size
-                                NULL,           // default "replacement" char
-                                NULL            // [out] was it used?
-                             );
+            //we need to double-trip to verify it didn't insert any ? in place
+            //of bogus characters
+            wxWCharBuffer wcBuf(n);
+            size_t pszlen = wxWcslen(psz);
+            if ( MB2WC(wcBuf.data(), buf, n) == (size_t)-1 ||
+                        wxWcslen(wcBuf) != pszlen ||
+                        memcmp(wcBuf, psz, pszlen * sizeof(wchar_t)) != 0 )
+            {
+                // we didn't obtain the same thing we started from, hence
+                // the conversion was lossy and we consider that it failed
+                return (size_t)-1;
+            }
+        }

 
 

-        // see the comment above!
-        return len ? (buf ? len : len - 1) : (size_t)-1;
+        return res ;

     }
 
     }
 

-    bool usable() const
-        { return m_CodePage != -1; }
+    bool IsOk() const
+        { return m_MB2WC_converter !=  NULL && m_WC2MB_converter != NULL  ; }

 
 

-public:
-    long m_CodePage;
+private:
+    TECObjectRef m_MB2WC_converter ;
+    TECObjectRef m_WC2MB_converter ;
+
+    TextEncodingBase m_char_encoding ;
+    TextEncodingBase m_unicode_encoding ;

 };
 };

-#endif // defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXUNIVERSAL__)
+
+#endif // defined(__WXMAC__) && defined(TARGET_CARBON)

 
 // ============================================================================
 // wxEncodingConverter based conversion classes
 
 // ============================================================================
 // wxEncodingConverter based conversion classes


@@ -806,134 +2360,119 @@ public:
 
 #if wxUSE_FONTMAP
 
 
 #if wxUSE_FONTMAP
 

-class EC_CharSet : public wxCharacterSet
+class wxMBConv_wxwin : public wxMBConv

 {
 {

+private:
+    void Init()
+    {
+        m_ok = m2w.Init(m_enc, wxFONTENCODING_UNICODE) &&
+               w2m.Init(wxFONTENCODING_UNICODE, m_enc);
+    }
+

 public:
     // temporarily just use wxEncodingConverter stuff,
     // so that it works while a better implementation is built
 public:
     // temporarily just use wxEncodingConverter stuff,
     // so that it works while a better implementation is built

-    EC_CharSet(const wxChar* name) : wxCharacterSet(name),
-                                     enc(wxFONTENCODING_SYSTEM)
+    wxMBConv_wxwin(const wxChar* name)

     {
         if (name)
     {
         if (name)

-            enc = wxFontMapper::Get()->CharsetToEncoding(name, FALSE);
+            m_enc = wxFontMapperBase::Get()->CharsetToEncoding(name, false);
+        else
+            m_enc = wxFONTENCODING_SYSTEM;
+
+        Init();
+    }
+
+    wxMBConv_wxwin(wxFontEncoding enc)
+    {
+        m_enc = enc;

 
 

-        m_ok = m2w.Init(enc, wxFONTENCODING_UNICODE) &&
-               w2m.Init(wxFONTENCODING_UNICODE, enc);
+        Init();

     }
 
     }
 

-    size_t MB2WC(wchar_t *buf, const char *psz, size_t WXUNUSED(n))
+    size_t MB2WC(wchar_t *buf, const char *psz, size_t WXUNUSED(n)) const

     {
         size_t inbuf = strlen(psz);
         if (buf)
     {
         size_t inbuf = strlen(psz);
         if (buf)

-            m2w.Convert(psz,buf);
+        {
+            if (!m2w.Convert(psz,buf))
+                return (size_t)-1;
+        }

         return inbuf;
     }
 
         return inbuf;
     }
 

-    size_t WC2MB(char *buf, const wchar_t *psz, size_t WXUNUSED(n))
+    size_t WC2MB(char *buf, const wchar_t *psz, size_t WXUNUSED(n)) const

     {
         const size_t inbuf = wxWcslen(psz);
         if (buf)
     {
         const size_t inbuf = wxWcslen(psz);
         if (buf)

-            w2m.Convert(psz,buf);
+        {
+            if (!w2m.Convert(psz,buf))
+                return (size_t)-1;
+        }

 
         return inbuf;
     }
 
 
         return inbuf;
     }
 

-    bool usable() const { return m_ok; }
+    bool IsOk() const { return m_ok; }

 
 public:
 
 public:

-    wxFontEncoding enc;
+    wxFontEncoding m_enc;

     wxEncodingConverter m2w, w2m;
 
     // were we initialized successfully?
     bool m_ok;
 
     wxEncodingConverter m2w, w2m;
 
     // were we initialized successfully?
     bool m_ok;
 

-    DECLARE_NO_COPY_CLASS(EC_CharSet)
+    DECLARE_NO_COPY_CLASS(wxMBConv_wxwin)

 };
 
 };
 

-#endif // wxUSE_FONTMAP
-
-// ----------------------------------------------------------------------------
-// the function creating the wxCharacterSet for the specified charset on the
-// current system, trying all possibilities
-// ----------------------------------------------------------------------------
-
-static wxCharacterSet *wxGetCharacterSet(const wxChar *name)
+// make the constructors available for unit testing
+WXDLLIMPEXP_BASE wxMBConv* new_wxMBConv_wxwin( const wxChar* name )

 {
 {

-    // check for the special case of ASCII charset
-#if wxUSE_FONTMAP
-    if ( wxFontMapper::Get()->CharsetToEncoding(name) == wxFONTENCODING_DEFAULT )
-#else // wxUSE_FONTMAP
-    if ( !name )
-#endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
+    wxMBConv_wxwin* result = new wxMBConv_wxwin( name );
+    if ( !result->IsOk() )

     {
     {

-        // don't convert at all
-        return NULL;
+        delete result;
+        return 0;

     }
     }

+    return result;
+}
+
+#endif // wxUSE_FONTMAP
+
+// ============================================================================
+// wxCSConv implementation
+// ============================================================================

 
 

-    // the test above must have taken care of this case
-    wxCHECK_MSG( name, NULL, _T("NULL name must be wxFONTENCODING_DEFAULT") );
+void wxCSConv::Init()
+{
+    m_name = NULL;
+    m_convReal =  NULL;
+    m_deferred = true;
+}

 
 

-    wxCharacterSet *cset;
+wxCSConv::wxCSConv(const wxChar *charset)
+{
+    Init();

 
 

-    if ( wxStricmp(name, wxT("UTF8")) == 0 || wxStricmp(name, wxT("UTF-8")) == 0)
+    if ( charset )

     {
     {

-        cset = new ID_CharSet(name, &wxConvUTF8);
-    }
-    else
-    {
-#ifdef HAVE_ICONV
-        cset = new IC_CharSet(name);
-#else // !HAVE_ICONV
-        cset = NULL;
-#endif // HAVE_ICONV/!HAVE_ICONV
+        SetName(charset);

     }
 
     }
 

-    // it can only be NULL in this case
-#ifndef HAVE_ICONV
-    if ( cset )
-#endif // !HAVE_ICONV
+    m_encoding = wxFONTENCODING_SYSTEM;
+}
+
+wxCSConv::wxCSConv(wxFontEncoding encoding)
+{
+    if ( encoding == wxFONTENCODING_MAX || encoding == wxFONTENCODING_DEFAULT )

     {
     {

-        if ( cset->usable() )
-            return cset;
+        wxFAIL_MSG( _T("invalid encoding value in wxCSConv ctor") );

 
 

-        delete cset;
-        cset = NULL;
+        encoding = wxFONTENCODING_SYSTEM;

     }
 
     }
 

-#if defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXUNIVERSAL__)
-    cset = new CP_CharSet(name);
-    if ( cset->usable() )
-        return cset;
-
-    delete cset;
-    cset = NULL;
-#endif // defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXUNIVERSAL__)
+    Init();

 
 

-#if wxUSE_FONTMAP
-    cset = new EC_CharSet(name);
-    if ( cset->usable() )
-        return cset;
-
-    delete cset;
-    cset = NULL;
-#endif // wxUSE_FONTMAP
-
-    wxLogError(_("Cannot convert from encoding '%s'!"), name);
-
-    return NULL;
-}
-
-// ============================================================================
-// wxCSConv implementation
-// ============================================================================
-
-wxCSConv::wxCSConv(const wxChar *charset)
-{
-    m_name = (wxChar *)NULL;
-    m_cset = (wxCharacterSet *) NULL;
-    m_deferred = TRUE;
-
-    SetName(charset);
+    m_encoding = encoding;

 }
 
 wxCSConv::~wxCSConv()
 }
 
 wxCSConv::~wxCSConv()


@@ -942,27 +2481,31 @@ wxCSConv::~wxCSConv()
 }
 
 wxCSConv::wxCSConv(const wxCSConv& conv)
 }
 
 wxCSConv::wxCSConv(const wxCSConv& conv)

-    : wxMBConv()
+        : wxMBConv()

 {
 {

-    Clear();
+    Init();
+

     SetName(conv.m_name);
     SetName(conv.m_name);

+    m_encoding = conv.m_encoding;

 }
 
 wxCSConv& wxCSConv::operator=(const wxCSConv& conv)
 {
     Clear();
 }
 
 wxCSConv& wxCSConv::operator=(const wxCSConv& conv)
 {
     Clear();

+

     SetName(conv.m_name);
     SetName(conv.m_name);

+    m_encoding = conv.m_encoding;
+

     return *this;
 }
 
 void wxCSConv::Clear()
 {
     return *this;
 }
 
 void wxCSConv::Clear()
 {

-    if (m_name)
-        free(m_name);
-    if (m_cset)
-        delete m_cset;
+    free(m_name);
+    delete m_convReal;
+

     m_name = NULL;
     m_name = NULL;

-    m_cset = NULL;
+    m_convReal = NULL;

 }
 
 void wxCSConv::SetName(const wxChar *charset)
 }
 
 void wxCSConv::SetName(const wxChar *charset)


@@ -970,39 +2513,255 @@ void wxCSConv::SetName(const wxChar *charset)
     if (charset)
     {
         m_name = wxStrdup(charset);
     if (charset)
     {
         m_name = wxStrdup(charset);

-        m_deferred = TRUE;
+        m_deferred = true;

     }
 }
 
     }
 }
 

-void wxCSConv::LoadNow()
+#if wxUSE_FONTMAP
+#include "wx/hashmap.h"
+
+WX_DECLARE_HASH_MAP( wxFontEncoding, wxString, wxIntegerHash, wxIntegerEqual,
+                     wxEncodingNameCache );
+
+static wxEncodingNameCache gs_nameCache;
+#endif
+
+wxMBConv *wxCSConv::DoCreate() const

 {
 {

-    if ( m_deferred )
+#if wxUSE_FONTMAP
+    wxLogTrace(TRACE_STRCONV,
+               wxT("creating conversion for %s"),
+               (m_name ? m_name
+                       : wxFontMapperBase::GetEncodingName(m_encoding).c_str()));
+#endif // wxUSE_FONTMAP
+
+    // check for the special case of ASCII or ISO8859-1 charset: as we have
+    // special knowledge of it anyhow, we don't need to create a special
+    // conversion object
+    if ( m_encoding == wxFONTENCODING_ISO8859_1 )

     {
     {

-        // it would probably be better to make GetSystemEncodingName() always
-        // available (i.e. even when wxUSE_INTL == 0)?
-#if wxUSE_INTL
-        if ( !m_name )
+        // don't convert at all
+        return NULL;
+    }
+
+    // we trust OS to do conversion better than we can so try external
+    // conversion methods first
+    //
+    // the full order is:
+    //      1. OS conversion (iconv() under Unix or Win32 API)
+    //      2. hard coded conversions for UTF
+    //      3. wxEncodingConverter as fall back
+
+    // step (1)
+#ifdef HAVE_ICONV
+#if !wxUSE_FONTMAP
+    if ( m_name )
+#endif // !wxUSE_FONTMAP
+    {
+        wxString name(m_name);
+        wxFontEncoding encoding(m_encoding);
+
+        if ( !name.empty() )
+        {
+            wxMBConv_iconv *conv = new wxMBConv_iconv(name);
+            if ( conv->IsOk() )
+                return conv;
+
+            delete conv;
+
+#if wxUSE_FONTMAP
+            encoding =
+                wxFontMapperBase::Get()->CharsetToEncoding(name, false);
+#endif // wxUSE_FONTMAP
+        }
+#if wxUSE_FONTMAP

         {
         {

-            wxString name = wxLocale::GetSystemEncodingName();
-            if ( !name.empty() )
+            const wxEncodingNameCache::iterator it = gs_nameCache.find(encoding);
+            if ( it != gs_nameCache.end() )
+            {
+                if ( it->second.empty() )
+                    return NULL;
+
+                wxMBConv_iconv *conv = new wxMBConv_iconv(it->second);
+                if ( conv->IsOk() )
+                    return conv;
+
+                delete conv;
+            }
+
+            const wxChar** names = wxFontMapperBase::GetAllEncodingNames(encoding);
+
+            for ( ; *names; ++names )

             {
             {

-                SetName(name);
+                wxMBConv_iconv *conv = new wxMBConv_iconv(*names);
+                if ( conv->IsOk() )
+                {
+                    gs_nameCache[encoding] = *names;
+                    return conv;
+                }
+
+                delete conv;

             }
             }

+
+            gs_nameCache[encoding] = _T(""); // cache the failure
+        }
+#endif // wxUSE_FONTMAP
+    }
+#endif // HAVE_ICONV
+
+#ifdef wxHAVE_WIN32_MB2WC
+    {
+#if wxUSE_FONTMAP
+        wxMBConv_win32 *conv = m_name ? new wxMBConv_win32(m_name)
+                                      : new wxMBConv_win32(m_encoding);
+        if ( conv->IsOk() )
+            return conv;
+
+        delete conv;
+#else
+        return NULL;
+#endif
+    }
+#endif // wxHAVE_WIN32_MB2WC
+#if defined(__WXMAC__)
+    {
+        // leave UTF16 and UTF32 to the built-ins of wx
+        if ( m_name || ( m_encoding < wxFONTENCODING_UTF16BE ||
+            ( m_encoding >= wxFONTENCODING_MACMIN && m_encoding <= wxFONTENCODING_MACMAX ) ) )
+        {
+
+#if wxUSE_FONTMAP
+            wxMBConv_mac *conv = m_name ? new wxMBConv_mac(m_name)
+                                        : new wxMBConv_mac(m_encoding);
+#else
+            wxMBConv_mac *conv = new wxMBConv_mac(m_encoding);
+#endif
+            if ( conv->IsOk() )
+                 return conv;
+
+            delete conv;
+        }
+    }
+#endif
+#if defined(__WXCOCOA__)
+    {
+        if ( m_name || ( m_encoding <= wxFONTENCODING_UTF16 ) )
+        {
+
+#if wxUSE_FONTMAP
+            wxMBConv_cocoa *conv = m_name ? new wxMBConv_cocoa(m_name)
+                                          : new wxMBConv_cocoa(m_encoding);
+#else
+            wxMBConv_cocoa *conv = new wxMBConv_cocoa(m_encoding);
+#endif
+            if ( conv->IsOk() )
+                 return conv;
+
+            delete conv;
+        }
+    }
+#endif
+    // step (2)
+    wxFontEncoding enc = m_encoding;
+#if wxUSE_FONTMAP
+    if ( enc == wxFONTENCODING_SYSTEM && m_name )
+    {
+        // use "false" to suppress interactive dialogs -- we can be called from
+        // anywhere and popping up a dialog from here is the last thing we want to
+        // do
+        enc = wxFontMapperBase::Get()->CharsetToEncoding(m_name, false);
+    }
+#endif // wxUSE_FONTMAP
+
+    switch ( enc )
+    {
+        case wxFONTENCODING_UTF7:
+             return new wxMBConvUTF7;
+
+        case wxFONTENCODING_UTF8:
+             return new wxMBConvUTF8;
+
+        case wxFONTENCODING_UTF16BE:
+             return new wxMBConvUTF16BE;
+
+        case wxFONTENCODING_UTF16LE:
+             return new wxMBConvUTF16LE;
+
+        case wxFONTENCODING_UTF32BE:
+             return new wxMBConvUTF32BE;
+
+        case wxFONTENCODING_UTF32LE:
+             return new wxMBConvUTF32LE;
+
+        default:
+             // nothing to do but put here to suppress gcc warnings
+             ;
+    }
+
+    // step (3)
+#if wxUSE_FONTMAP
+    {
+        wxMBConv_wxwin *conv = m_name ? new wxMBConv_wxwin(m_name)
+                                      : new wxMBConv_wxwin(m_encoding);
+        if ( conv->IsOk() )
+            return conv;
+
+        delete conv;
+    }
+#endif // wxUSE_FONTMAP
+
+    // NB: This is a hack to prevent deadlock. What could otherwise happen
+    //     in Unicode build: wxConvLocal creation ends up being here
+    //     because of some failure and logs the error. But wxLog will try to
+    //     attach timestamp, for which it will need wxConvLocal (to convert
+    //     time to char* and then wchar_t*), but that fails, tries to log
+    //     error, but wxLog has a (already locked) critical section that
+    //     guards static buffer.
+    static bool alreadyLoggingError = false;
+    if (!alreadyLoggingError)
+    {
+        alreadyLoggingError = true;
+        wxLogError(_("Cannot convert from the charset '%s'!"),
+                   m_name ? m_name
+                      :
+#if wxUSE_FONTMAP
+                         wxFontMapperBase::GetEncodingDescription(m_encoding).c_str()
+#else // !wxUSE_FONTMAP
+                         wxString::Format(_("encoding %s"), m_encoding).c_str()
+#endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
+              );
+        alreadyLoggingError = false;
+    }
+
+    return NULL;
+}
+
+void wxCSConv::CreateConvIfNeeded() const
+{
+    if ( m_deferred )
+    {
+        wxCSConv *self = (wxCSConv *)this; // const_cast
+
+#if wxUSE_INTL
+        // if we don't have neither the name nor the encoding, use the default
+        // encoding for this system
+        if ( !m_name && m_encoding == wxFONTENCODING_SYSTEM )
+        {
+            self->m_name = wxStrdup(wxLocale::GetSystemEncodingName());

         }
 #endif // wxUSE_INTL
 
         }
 #endif // wxUSE_INTL
 

-        // wxGetCharacterSet() complains about NULL name
-        m_cset = m_name ? wxGetCharacterSet(m_name) : NULL;
-        m_deferred = FALSE;
+        self->m_convReal = DoCreate();
+        self->m_deferred = false;

     }
 }
 
 size_t wxCSConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 {
     }
 }
 
 size_t wxCSConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 {

-    ((wxCSConv *)this)->LoadNow(); // discard constness
+    CreateConvIfNeeded();

 
 

-    if (m_cset)
-        return m_cset->MB2WC(buf, psz, n);
+    if (m_convReal)
+        return m_convReal->MB2WC(buf, psz, n);

 
     // latin-1 (direct)
     size_t len = strlen(psz);
 
     // latin-1 (direct)
     size_t len = strlen(psz);


@@ -1018,22 +2777,73 @@ size_t wxCSConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 
 size_t wxCSConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 {
 
 size_t wxCSConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 {

-    ((wxCSConv *)this)->LoadNow(); // discard constness
+    CreateConvIfNeeded();

 
 

-    if (m_cset)
-        return m_cset->WC2MB(buf, psz, n);
+    if (m_convReal)
+        return m_convReal->WC2MB(buf, psz, n);

 
     // latin-1 (direct)
     const size_t len = wxWcslen(psz);
     if (buf)
     {
         for (size_t c = 0; c <= len; c++)
 
     // latin-1 (direct)
     const size_t len = wxWcslen(psz);
     if (buf)
     {
         for (size_t c = 0; c <= len; c++)

-            buf[c] = (psz[c] > 0xff) ? '?' : psz[c];
+        {
+            if (psz[c] > 0xFF)
+                return (size_t)-1;
+            buf[c] = (char)psz[c];
+        }
+    }
+    else
+    {
+        for (size_t c = 0; c <= len; c++)
+        {
+            if (psz[c] > 0xFF)
+                return (size_t)-1;
+        }

     }
 
     return len;
 }
 
     }
 
     return len;
 }
 

-#endif // wxUSE_WCHAR_T
+// ----------------------------------------------------------------------------
+// globals
+// ----------------------------------------------------------------------------
+
+#ifdef __WINDOWS__
+    static wxMBConv_win32 wxConvLibcObj;
+#elif defined(__WXMAC__) && !defined(__MACH__)
+    static wxMBConv_mac wxConvLibcObj ;
+#else
+    static wxMBConvLibc wxConvLibcObj;
+#endif
+
+static wxCSConv wxConvLocalObj(wxFONTENCODING_SYSTEM);
+static wxCSConv wxConvISO8859_1Obj(wxFONTENCODING_ISO8859_1);
+static wxMBConvUTF7 wxConvUTF7Obj;
+static wxMBConvUTF8 wxConvUTF8Obj;
+
+WXDLLIMPEXP_DATA_BASE(wxMBConv&) wxConvLibc = wxConvLibcObj;
+WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal = wxConvLocalObj;
+WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvISO8859_1 = wxConvISO8859_1Obj;
+WXDLLIMPEXP_DATA_BASE(wxMBConvUTF7&) wxConvUTF7 = wxConvUTF7Obj;
+WXDLLIMPEXP_DATA_BASE(wxMBConvUTF8&) wxConvUTF8 = wxConvUTF8Obj;
+WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent = &wxConvLibcObj;
+WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName = &
+#ifdef __WXOSX__
+                                    wxConvUTF8Obj;
+#else
+                                    wxConvLibcObj;
+#endif
+
+
+#else // !wxUSE_WCHAR_T
+
+// stand-ins in absence of wchar_t
+WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc,
+                                wxConvISO8859_1,
+                                wxConvLocal,
+                                wxConvUTF8;
+
+#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T