made wxTextFile work in Unicode; also made it possible to use it with non seekable...

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

diff --git a/src/common/strconv.cpp b/src/common/strconv.cpp
index 6a4ff39c4faa1f5e3c1b68ad6524979de5fa5fe0..7b0e78a69db5d1eba0700ec2bde0c11ba8f66381 100644 (file)
--- a/src/common/strconv.cpp
+++ b/src/common/strconv.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        strconv.cpp
+// Name:        src/common/strconv.cpp

 // Purpose:     Unicode conversion classes
 // Author:      Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik,
 //              Ryan Norton, Fredrik Roubert (UTF7)
 // Purpose:     Unicode conversion classes
 // Author:      Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik,
 //              Ryan Norton, Fredrik Roubert (UTF7)


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

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-  #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"
 


@@ -40,11 +36,8 @@
 
 #if wxUSE_WCHAR_T
 
 
 #if wxUSE_WCHAR_T
 

-#ifdef __WXMSW__
-    #include "wx/msw/private.h"
-#endif
-

 #ifdef __WINDOWS__
 #ifdef __WINDOWS__

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

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


@@ -60,16 +53,13 @@
     #define wxHAVE_WIN32_MB2WC
 #endif // __WIN32__ but !__WXMICROWIN__
 
     #define wxHAVE_WIN32_MB2WC
 #endif // __WIN32__ but !__WXMICROWIN__
 

-// ----------------------------------------------------------------------------
-// headers
-// ----------------------------------------------------------------------------
-

 #ifdef __SALFORDC__
     #include <clib.h>
 #endif
 
 #ifdef HAVE_ICONV
     #include <iconv.h>
 #ifdef __SALFORDC__
     #include <clib.h>
 #endif
 
 #ifdef HAVE_ICONV
     #include <iconv.h>

+    #include "wx/thread.h"

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


@@ -77,39 +67,19 @@
 #include "wx/utils.h"
 
 #ifdef __WXMAC__
 #include "wx/utils.h"
 
 #ifdef __WXMAC__

+#ifndef __DARWIN__

 #include <ATSUnicode.h>
 #include <TextCommon.h>
 #include <TextEncodingConverter.h>
 #include <ATSUnicode.h>
 #include <TextCommon.h>
 #include <TextEncodingConverter.h>

+#endif

 
 #include  "wx/mac/private.h"  // includes mac headers
 #endif
 
 #include  "wx/mac/private.h"  // includes mac headers
 #endif

-// ----------------------------------------------------------------------------
-// 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]); }
+#define TRACE_STRCONV _T("strconv")

 
 

-#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
+#if SIZEOF_WCHAR_T == 2

     #define WC_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
-    // does this ever happen?
-    #error "Unknown sizeof(wchar_t): please report this to wx-dev@lists.wxwindows.org"

 #endif
 
 // ============================================================================
 #endif
 
 // ============================================================================


@@ -151,7 +121,7 @@ static size_t decode_utf16(const wxUint16* input, wxUint32& output)
         output = *input;
         return 1;
     }
         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;


@@ -217,14 +187,18 @@ const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *pwz) const
     return buf;
 }
 
     return buf;
 }
 

-size_t wxMBConv::MB2WC(wchar_t* szBuffer, const char* szString, 
-                       size_t outsize, size_t nStringLen) const
+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;
     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
 
     //Convert the string until the length() is reached, continuing the
     //loop every time a null character is reached


@@ -237,38 +211,57 @@ size_t wxMBConv::MB2WC(wchar_t* szBuffer, const char* szString,
 
         //Invalid conversion?
         if( nLen == (size_t)-1 )
 
         //Invalid conversion?
         if( nLen == (size_t)-1 )

-            return nLen;
+        {
+            *pOutSize = 0;
+            theBuffer.data()[0u] = wxT('\0');
+            return theBuffer;
+        }
+

 
         //Increase the actual length (+1 for current null character)
         nActualLength += nLen + 1;
 
 
         //Increase the actual length (+1 for current null character)
         nActualLength += nLen + 1;
 

-        //Only copy data in if buffer size is big enough
-        if (szBuffer != NULL &&
-            nActualLength <= outsize)
+        //if buffer too big, realloc the buffer
+        if (nActualLength > (nCurrentSize+1))

         {
         {

-            //Convert the current (sub)string
-            if ( MB2WC(&szBuffer[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
-                return (size_t)-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
         }
 
         //Increment to next (sub)string

-        //Note that we have to use strlen here instead of nLen
-        //here because XX2XX gives us the size of the output buffer,
-        //not neccessarly the length of the 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;
     }
 
         szPos += strlen(szPos) + 1;
     }
 

-    return nActualLength - 1; //success - return actual length
+    //success - return actual length and the buffer
+    *pOutSize = nActualLength;
+    return theBuffer;

 }
 
 }
 

-size_t wxMBConv::WC2MB(char* szBuffer, const wchar_t* szString, 
-                       size_t outsize, size_t nStringLen) const
+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;
     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
 
     //Convert the string until the length() is reached, continuing the
     //loop every time a null character is reached


@@ -281,28 +274,42 @@ size_t wxMBConv::WC2MB(char* szBuffer, const wchar_t* szString,
 
         //Invalid conversion?
         if( nLen == (size_t)-1 )
 
         //Invalid conversion?
         if( nLen == (size_t)-1 )

-            return nLen;
+        {
+            *pOutSize = 0;
+            theBuffer.data()[0u] = wxT('\0');
+            return theBuffer;
+        }

 
         //Increase the actual length (+1 for current null character)
         nActualLength += nLen + 1;
 
         //Increase the actual length (+1 for current null character)
         nActualLength += nLen + 1;

-        
-        //Only copy data in if buffer size is big enough
-        if (szBuffer != NULL &&
-            nActualLength <= outsize)
+
+        //if buffer too big, realloc the buffer
+        if (nActualLength > (nCurrentSize+1))

         {
         {

-            //Convert the current (sub)string
-            if(WC2MB(&szBuffer[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
-                return (size_t)-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
         }
 
         //Increment to next (sub)string

-        //Note that we have to use wxWcslen here instead of nLen
-        //here because XX2XX gives us the size of the output buffer,
-        //not neccessarly the length of the 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;
     }
 
         szPos += wxWcslen(szPos) + 1;
     }
 

-    return nActualLength - 1;  //success - return actual length
+    //success - return actual length and the buffer
+    *pOutSize = nActualLength;
+    return theBuffer;

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -318,8 +325,42 @@ size_t wxMBConvLibc::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 {
     return wxWC2MB(buf, psz, n);
 }
 {
     return wxWC2MB(buf, psz, n);
 }

+
+#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 m_conv->MB2WC( outputBuf, psz, outputSize );
+}
+
+size_t
+wxConvBrokenFileNames::WC2MB(char *outputBuf,
+                             const wchar_t *psz,
+                             size_t outputSize) const
+{
+    return m_conv->WC2MB( outputBuf, psz, outputSize );
+}
+
+#endif
+

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

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

 // ----------------------------------------------------------------------------
 
 // Implementation (C) 2004 Fredrik Roubert
 // ----------------------------------------------------------------------------
 
 // Implementation (C) 2004 Fredrik Roubert


@@ -365,7 +406,6 @@ static const unsigned char utf7unb64[] =
 
 size_t wxMBConvUTF7::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)))


@@ -399,7 +439,7 @@ size_t wxMBConvUTF7::MB2WC(wchar_t *buf, const char *psz, size_t n) const
                 d += cc;
                 for (l += 6; l >= 8; lsb = !lsb)
                 {
                 d += cc;
                 for (l += 6; l >= 8; lsb = !lsb)
                 {

-                    c = (d >> (l -= 8)) % 256;
+                    c = (unsigned char)((d >> (l -= 8)) % 256);

                     if (lsb)
                     {
                         if (buf)
                     if (lsb)
                     {
                         if (buf)


@@ -408,7 +448,7 @@ size_t wxMBConvUTF7::MB2WC(wchar_t *buf, const char *psz, size_t n) const
                     }
                     else
                         if (buf)
                     }
                     else
                         if (buf)

-                            *buf = c << 8;
+                            *buf = (wchar_t)(c << 8);

                 }
             }
             if (*psz == '-')
                 }
             }
             if (*psz == '-')


@@ -455,8 +495,7 @@ static const unsigned char utf7encode[128] =
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 3, 3
 };
 
     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 wxMBConvUTF7::WC2MB(char *buf, const wchar_t *psz, size_t n) const

 {
 
 
 {
 
 


@@ -473,12 +512,8 @@ size_t wxMBConvUTF7::WC2MB(char *buf, const wchar_t
             len++;
         }
 #ifndef WC_UTF16
             len++;
         }
 #ifndef WC_UTF16

-#ifdef __VMS
-       else if (cc > 0xffff)
-#else
-       else if (cc > ((const wchar_t)0xffff))
-#endif
-        {
+        else if (((wxUint32)cc) > 0xffff)
+        {

             // no surrogate pair generation (yet?)
             return (size_t)-1;
         }
             // no surrogate pair generation (yet?)
             return (size_t)-1;
         }


@@ -492,7 +527,7 @@ size_t wxMBConvUTF7::WC2MB(char *buf, const wchar_t
             {
                 // BASE64 encode string
                 unsigned int lsb, d, l;
             {
                 // BASE64 encode string
                 unsigned int lsb, d, l;

-                for (d = 0, l = 0;; psz++)
+                for (d = 0, l = 0; /*nothing*/; psz++)

                 {
                     for (lsb = 0; lsb < 2; lsb ++)
                     {
                 {
                     for (lsb = 0; lsb < 2; lsb ++)
                     {


@@ -535,12 +570,19 @@ size_t wxMBConvUTF7::WC2MB(char *buf, const wchar_t
 static wxUint32 utf8_max[]=
     { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff, 0xffffffff };
 
 static wxUint32 utf8_max[]=
     { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff, 0xffffffff };
 

+// 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;
+

 size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 {
     size_t len = 0;
 
     while (*psz && ((!buf) || (len < n)))
     {
 size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 {
     size_t len = 0;
 
     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++)
         unsigned char cc = *psz++, fc = cc;
         unsigned cnt;
         for (cnt = 0; fc & 0x80; cnt++)


@@ -551,6 +593,15 @@ size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
             if (buf)
                 *buf++ = cc;
             len++;
             if (buf)
                 *buf++ = cc;
             len++;

+
+            // 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
         {
         }
         else
         {


@@ -558,7 +609,7 @@ size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
             if (!cnt)
             {
                 // invalid UTF-8 sequence
             if (!cnt)
             {
                 // invalid UTF-8 sequence

-                return (size_t)-1;
+                invalid = true;

             }
             else
             {
             }
             else
             {


@@ -566,32 +617,93 @@ size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
                 wxUint32 res = cc & (0x3f >> cnt);
                 while (cnt--)
                 {
                 wxUint32 res = cc & (0x3f >> cnt);
                 while (cnt--)
                 {

-                    cc = *psz++;
+                    cc = *psz;

                     if ((cc & 0xC0) != 0x80)
                     {
                         // invalid UTF-8 sequence
                     if ((cc & 0xC0) != 0x80)
                     {
                         // invalid UTF-8 sequence

-                        return (size_t)-1;
+                        invalid = true;
+                        break;

                     }
                     }

+                    psz++;

                     res = (res << 6) | (cc & 0x3f);
                 }
                     res = (res << 6) | (cc & 0x3f);
                 }

-                if (res <= utf8_max[ocnt])
+                if (invalid || res <= utf8_max[ocnt])

                 {
                     // illegal UTF-8 encoding
                 {
                     // illegal UTF-8 encoding

-                    return (size_t)-1;
+                    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
 #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)
-                  return (size_t)-1;
-                if (buf)
-                    buf += pa;
-                len += pa;
+                    // 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
 #else // !WC_UTF16

-                if (buf)
-                    *buf++ = res;
-                len++;
+                    if (buf)
+                        *buf++ = (wchar_t)res;
+                    len++;

 #endif // WC_UTF16/!WC_UTF16
 #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++ = (wchar_t)(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;
+                }

             }
         }
     }
             }
         }
     }


@@ -600,6 +712,11 @@ size_t wxMBConvUTF8::MB2WC(wchar_t *buf, const char *psz, size_t n) const
     return len;
 }
 
     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;
 size_t wxMBConvUTF8::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 {
     size_t len = 0;


@@ -614,36 +731,67 @@ size_t wxMBConvUTF8::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 #else
         cc=(*psz++) & 0x7fffffff;
 #endif
 #else
         cc=(*psz++) & 0x7fffffff;
 #endif

-        unsigned cnt;
-        for (cnt = 0; cc > utf8_max[cnt]; cnt++) {}
-        if (!cnt)
+
+        if ( (m_options & MAP_INVALID_UTF8_TO_PUA)
+                && cc >= wxUnicodePUA && cc < wxUnicodePUAEnd )

         {
         {

-            // plain ASCII char

             if (buf)
             if (buf)

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

             len++;
         }
             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
         {
         else
         {

-            len += cnt + 1;
-            if (buf)
+            unsigned cnt;
+            for (cnt = 0; cc > utf8_max[cnt]; cnt++) {}
+            if (!cnt)

             {
             {

-                *buf++ = (char) ((-128 >> cnt) | ((cc >> (cnt * 6)) & (0x3f >> cnt)));
-                while (cnt--)
-                    *buf++ = (char) (0x80 | ((cc >> (cnt * 6)) & 0x3f));
+                // 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;
+    if (buf && (len<n))
+        *buf = 0;

 
     return len;
 }
 
 
     return len;
 }
 

-
-
-

 // ----------------------------------------------------------------------------
 // UTF-16
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // UTF-16
 // ----------------------------------------------------------------------------


@@ -758,7 +906,7 @@ size_t wxMBConvUTF16straight::MB2WC(wchar_t *buf, const char *psz, size_t n) con
             return pa;
 
         if (buf)
             return pa;
 
         if (buf)

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

         len++;
         psz += pa * sizeof(wxUint16);
     }
         len++;
         psz += pa * sizeof(wxUint16);
     }


@@ -818,7 +966,7 @@ size_t wxMBConvUTF16swap::MB2WC(wchar_t *buf, const char *psz, size_t n) const
             return pa;
 
         if (buf)
             return pa;
 
         if (buf)

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

 
         len++;
         psz += pa * sizeof(wxUint16);
 
         len++;
         psz += pa * sizeof(wxUint16);


@@ -1019,7 +1167,7 @@ size_t wxMBConvUTF32straight::MB2WC(wchar_t *buf, const char *psz, size_t n) con
     while (*(wxUint32*)psz && (!buf || len < n))
     {
         if (buf)
     while (*(wxUint32*)psz && (!buf || len < n))
     {
         if (buf)

-            *buf++ = *(wxUint32*)psz;
+            *buf++ = (wchar_t)(*(wxUint32*)psz);

         len++;
         psz += sizeof(wxUint32);
     }
         len++;
         psz += sizeof(wxUint32);
     }


@@ -1115,12 +1263,13 @@ size_t wxMBConvUTF32swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 
 #ifdef HAVE_ICONV
 
 
 #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.
+// 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) && \
 //     [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) && \


@@ -1131,6 +1280,19 @@ size_t wxMBConvUTF32swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 
 #define ICONV_CHAR_CAST(x)  ((ICONV_CONST char **)(x))
 
 
 #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
+

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


@@ -1145,124 +1307,177 @@ public:
     virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const;
 
     bool IsOk() const
     virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const;
 
     bool IsOk() const

-        { return (m2w != (iconv_t)-1) && (w2m != (iconv_t)-1); }
+        { 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:
     // the name (for iconv_open()) of a wide char charset -- if none is
     // available on this machine, it will remain NULL
 
 private:
     // the name (for iconv_open()) of a wide char charset -- if none is
     // 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 *wxMBConv_iconv::ms_wcCharsetName = NULL;
+// 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;
 
 wxMBConv_iconv::wxMBConv_iconv(const wxChar *name)
 {
 bool wxMBConv_iconv::ms_wcNeedsSwap = false;
 
 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

 
 

-            if (m2w != (iconv_t)-1)
+            wxLogTrace(TRACE_STRCONV, _T("  trying charset \"%s\""),
+                       nameXE.c_str());
+
+            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 wxWidgets 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());
+        }

     }
 }
 
 wxMBConv_iconv::~wxMBConv_iconv()
 {
     }
 }
 
 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);
 }
 
 size_t wxMBConv_iconv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 {
         iconv_close(w2m);
 }
 
 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;


@@ -1281,7 +1496,8 @@ size_t wxMBConv_iconv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
         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


@@ -1311,7 +1527,7 @@ size_t wxMBConv_iconv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
     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 (size_t)-1;
     }
 


@@ -1320,7 +1536,13 @@ size_t wxMBConv_iconv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 
 size_t wxMBConv_iconv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 {
 
 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;
 


@@ -1329,13 +1551,13 @@ size_t wxMBConv_iconv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
     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)


@@ -1373,8 +1595,7 @@ size_t wxMBConv_iconv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 
     if (ICONV_FAILED(cres, inbuf))
     {
 
     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 (size_t)-1;
     }
 


@@ -1423,20 +1644,80 @@ public:
         // and break the library itself, e.g. wxTextInputStream::NextChar()
         // wouldn't work if reading an incomplete MB char didn't result in an
         // error
         // 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...
+        //
+        // Moreover, MB_ERR_INVALID_CHARS is only supported on Win 2K SP4 or
+        // Win XP or newer and if it is specified on older versions, conversion
+        // from CP_UTF8 (which can have flags only 0 or MB_ERR_INVALID_CHARS)
+        // fails. So we can only use the flag on newer Windows versions.
+        // Additionally, the flag is not supported by UTF7, symbol and CJK
+        // encodings. See here:
+        //     http://blogs.msdn.com/michkap/archive/2005/04/19/409566.aspx
+        //     http://msdn.microsoft.com/library/en-us/intl/unicode_17si.asp
+        int flags = 0;
+        if ( m_CodePage != CP_UTF7 && m_CodePage != CP_SYMBOL &&
+             m_CodePage < 50000 &&
+             IsAtLeastWin2kSP4() )
+        {
+            flags = MB_ERR_INVALID_CHARS;
+        }
+        else if ( m_CodePage == CP_UTF8 )
+        {
+            // Avoid round-trip in the special case of UTF-8 by using our
+            // own UTF-8 conversion code:
+            return wxMBConvUTF8().MB2WC(buf, psz, n);
+        }
+

         const size_t len = ::MultiByteToWideChar
                              (
                                 m_CodePage,     // code page
         const size_t len = ::MultiByteToWideChar
                              (
                                 m_CodePage,     // code page

-                                MB_ERR_INVALID_CHARS, // flags: fall on error
+                                flags,          // flags: fall on error

                                 psz,            // input string
                                 -1,             // its length (NUL-terminated)
                                 buf,            // output string
                                 buf ? n : 0     // size of output buffer
                              );
                                 psz,            // input string
                                 -1,             // its length (NUL-terminated)
                                 buf,            // output string
                                 buf ? n : 0     // size of output buffer
                              );

+        if ( !len )
+        {
+            // function totally failed
+            return (size_t)-1;
+        }
+
+        // if we were really converting and didn't use MB_ERR_INVALID_CHARS,
+        // check if we succeeded, by doing a double trip:
+        if ( !flags && buf )
+        {
+            wxCharBuffer mbBuf(n);
+            if ( ::WideCharToMultiByte
+                   (
+                      m_CodePage,
+                      0,
+                      buf,
+                      -1,
+                      mbBuf.data(),
+                      n,
+                      NULL,
+                      NULL
+                   ) == 0 ||
+                  strcmp(mbBuf, psz) != 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;
+            }
+        }

 
         // 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
 
         // 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;
+        return len - 1;

     }
 
     size_t WC2MB(char *buf, const wchar_t *pwz, size_t n) const
     }
 
     size_t WC2MB(char *buf, const wchar_t *pwz, size_t n) const


@@ -1551,6 +1832,33 @@ private:
         return s_isWin98Or2k == 1;
     }
 
         return s_isWin98Or2k == 1;
     }
 

+    static bool IsAtLeastWin2kSP4()
+    {
+#ifdef __WXWINCE__
+        return false;
+#else
+        static int s_isAtLeastWin2kSP4 = -1;
+
+        if ( s_isAtLeastWin2kSP4 == -1 )
+        {
+            OSVERSIONINFOEX ver;
+
+            memset(&ver, 0, sizeof(ver));
+            ver.dwOSVersionInfoSize = sizeof(ver);
+            GetVersionEx((OSVERSIONINFO*)&ver);
+
+            s_isAtLeastWin2kSP4 =
+              ((ver.dwMajorVersion > 5) || // Vista+
+               (ver.dwMajorVersion == 5 && ver.dwMinorVersion > 0) || // XP/2003
+               (ver.dwMajorVersion == 5 && ver.dwMinorVersion == 0 &&
+               ver.wServicePackMajor >= 4)) // 2000 SP4+
+              ? 1 : 0;
+        }
+
+        return s_isAtLeastWin2kSP4 == 1;
+#endif
+    }
+

     long m_CodePage;
 };
 
     long m_CodePage;
 };
 


@@ -1834,10 +2142,12 @@ public:
         Init(CFStringGetSystemEncoding()) ;
     }
 
         Init(CFStringGetSystemEncoding()) ;
     }
 

+#if wxUSE_FONTMAP

     wxMBConv_cocoa(const wxChar* name)
     {
     wxMBConv_cocoa(const wxChar* name)
     {

-        Init( wxCFStringEncFromFontEnc(wxFontMapper::Get()->CharsetToEncoding(name, false) ) ) ;
+        Init( wxCFStringEncFromFontEnc(wxFontMapperBase::Get()->CharsetToEncoding(name, false) ) ) ;

     }
     }

+#endif

 
     wxMBConv_cocoa(wxFontEncoding encoding)
     {
 
     wxMBConv_cocoa(wxFontEncoding encoding)
     {


@@ -1880,9 +2190,9 @@ public:
 #if SIZEOF_WCHAR_T == 4
         UniChar* szUniCharBuffer = new UniChar[nOutSize];
 #endif
 #if SIZEOF_WCHAR_T == 4
         UniChar* szUniCharBuffer = new UniChar[nOutSize];
 #endif

- 
+

         CFStringGetCharacters(theString, theRange, szUniCharBuffer);
         CFStringGetCharacters(theString, theRange, szUniCharBuffer);

-        
+

         CFRelease(theString);
 
         szUniCharBuffer[nOutLength] = '\0' ;
         CFRelease(theString);
 
         szUniCharBuffer[nOutLength] = '\0' ;


@@ -1892,20 +2202,20 @@ public:
         converter.MB2WC(szOut, (const char*)szUniCharBuffer , nOutSize ) ;
         delete[] szUniCharBuffer;
 #endif
         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);
         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
         size_t nRealOutSize;
         size_t nBufSize = wxWcslen(szUnConv);
         UniChar* szUniBuffer = (UniChar*) szUnConv;
 
 #if SIZEOF_WCHAR_T == 4

-        wxMBConvUTF16BE converter ;
+        wxMBConvUTF16 converter ;

         nBufSize = converter.WC2MB( NULL , szUnConv , 0 );
         szUniBuffer = new UniChar[ (nBufSize / sizeof(UniChar)) + 1] ;
         converter.WC2MB( (char*) szUniBuffer , szUnConv, nBufSize + sizeof(UniChar)) ;
         nBufSize = converter.WC2MB( NULL , szUnConv , 0 );
         szUniBuffer = new UniChar[ (nBufSize / sizeof(UniChar)) + 1] ;
         converter.WC2MB( (char*) szUniBuffer , szUnConv, nBufSize + sizeof(UniChar)) ;


@@ -1927,7 +2237,7 @@ public:
         {
             if (szOut != NULL)
                 CFStringGetCharacters(theString, CFRangeMake(0, nOutSize - 1), (UniChar*) szOut);
         {
             if (szOut != NULL)
                 CFStringGetCharacters(theString, CFRangeMake(0, nOutSize - 1), (UniChar*) szOut);

-            
+

             nRealOutSize = CFStringGetLength(theString) + 1;
         }
         else
             nRealOutSize = CFStringGetLength(theString) + 1;
         }
         else


@@ -1940,7 +2250,7 @@ public:
                     //0 tells CFString to return NULL if it meets such a character
                 false, //not an external representation
                 (UInt8*) szOut,
                     //0 tells CFString to return NULL if it meets such a character
                 false, //not an external representation
                 (UInt8*) szOut,

-                nOutSize, 
+                nOutSize,

                 (CFIndex*) &nRealOutSize
                         );
         }
                 (CFIndex*) &nRealOutSize
                         );
         }


@@ -1956,7 +2266,7 @@ public:
 
     bool IsOk() const
     {
 
     bool IsOk() const
     {

-        return m_encoding != kCFStringEncodingInvalidId && 
+        return m_encoding != kCFStringEncodingInvalidId &&

               CFStringIsEncodingAvailable(m_encoding);
     }
 
               CFStringIsEncodingAvailable(m_encoding);
     }
 


@@ -1980,10 +2290,12 @@ public:
         Init(CFStringGetSystemEncoding()) ;
     }
 
         Init(CFStringGetSystemEncoding()) ;
     }
 

+#if wxUSE_FONTMAP

     wxMBConv_mac(const wxChar* name)
     {
     wxMBConv_mac(const wxChar* name)
     {

-        Init( wxMacGetSystemEncFromFontEnc(wxFontMapper::Get()->CharsetToEncoding(name, false) ) ) ;
+        Init( wxMacGetSystemEncFromFontEnc(wxFontMapperBase::Get()->CharsetToEncoding(name, false) ) ) ;

     }
     }

+#endif

 
     wxMBConv_mac(wxFontEncoding encoding)
     {
 
     wxMBConv_mac(wxFontEncoding encoding)
     {


@@ -2024,7 +2336,7 @@ public:
         if (buf == NULL)
         {
             //apple specs say at least 32
         if (buf == NULL)
         {
             //apple specs say at least 32

-            n = max( 32 , byteInLen ) ;
+            n = wxMax( 32 , byteInLen ) ;

             tbuf = (wchar_t*) malloc( n * SIZEOF_WCHAR_T) ;
         }
         ByteCount byteBufferLen = n * sizeof( UniChar ) ;
             tbuf = (wchar_t*) malloc( n * SIZEOF_WCHAR_T) ;
         }
         ByteCount byteBufferLen = n * sizeof( UniChar ) ;


@@ -2039,7 +2351,7 @@ public:
         // 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 ;
         // 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 ;

-        wxMBConvUTF16BE converter ;
+        wxMBConvUTF16 converter ;

         res = converter.MB2WC( (buf ? buf : tbuf) , (const char*)ubuf , n ) ;
         free( ubuf ) ;
 #else
         res = converter.MB2WC( (buf ? buf : tbuf) , (const char*)ubuf , n ) ;
         free( ubuf ) ;
 #else


@@ -2065,14 +2377,14 @@ public:
         if (buf == NULL)
         {
             //apple specs say at least 32
         if (buf == NULL)
         {
             //apple specs say at least 32

-            n = max( 32 , ((byteInLen / SIZEOF_WCHAR_T) * 8) + SIZEOF_WCHAR_T );
+            n = wxMax( 32 , ((byteInLen / SIZEOF_WCHAR_T) * 8) + SIZEOF_WCHAR_T );

             tbuf = (char*) malloc( n ) ;
         }
 
         ByteCount byteBufferLen = n ;
         UniChar* ubuf = NULL ;
 #if SIZEOF_WCHAR_T == 4
             tbuf = (char*) malloc( n ) ;
         }
 
         ByteCount byteBufferLen = n ;
         UniChar* ubuf = NULL ;
 #if SIZEOF_WCHAR_T == 4

-        wxMBConvUTF16BE converter ;
+        wxMBConvUTF16 converter ;

         size_t unicharlen = converter.WC2MB( NULL , psz , 0 ) ;
         byteInLen = unicharlen ;
         ubuf = (UniChar*) malloc( byteInLen + 2 ) ;
         size_t unicharlen = converter.WC2MB( NULL , psz , 0 ) ;
         byteInLen = unicharlen ;
         ubuf = (UniChar*) malloc( byteInLen + 2 ) ;


@@ -2092,7 +2404,7 @@ public:
         if ( buf  && res < n)
         {
             buf[res] = 0;
         if ( buf  && res < n)
         {
             buf[res] = 0;

-            
+

             //we need to double-trip to verify it didn't insert any ? in place
             //of bogus characters
             wxWCharBuffer wcBuf(n);
             //we need to double-trip to verify it didn't insert any ? in place
             //of bogus characters
             wxWCharBuffer wcBuf(n);


@@ -2144,7 +2456,7 @@ public:
     wxMBConv_wxwin(const wxChar* name)
     {
         if (name)
     wxMBConv_wxwin(const wxChar* name)
     {
         if (name)

-            m_enc = wxFontMapper::Get()->CharsetToEncoding(name, false);
+            m_enc = wxFontMapperBase::Get()->CharsetToEncoding(name, false);

         else
             m_enc = wxFONTENCODING_SYSTEM;
 
         else
             m_enc = wxFONTENCODING_SYSTEM;
 


@@ -2162,7 +2474,10 @@ public:
     {
         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;
     }
 


@@ -2170,7 +2485,10 @@ public:
     {
         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;
     }


@@ -2187,6 +2505,18 @@ public:
     DECLARE_NO_COPY_CLASS(wxMBConv_wxwin)
 };
 
     DECLARE_NO_COPY_CLASS(wxMBConv_wxwin)
 };
 

+// make the constructors available for unit testing
+WXDLLIMPEXP_BASE wxMBConv* new_wxMBConv_wxwin( const wxChar* name )
+{
+    wxMBConv_wxwin* result = new wxMBConv_wxwin( name );
+    if ( !result->IsOk() )
+    {
+        delete result;
+        return 0;
+    }
+    return result;
+}
+

 #endif // wxUSE_FONTMAP
 
 // ============================================================================
 #endif // wxUSE_FONTMAP
 
 // ============================================================================


@@ -2209,7 +2539,11 @@ wxCSConv::wxCSConv(const wxChar *charset)
         SetName(charset);
     }
 
         SetName(charset);
     }
 

+#if wxUSE_FONTMAP
+    m_encoding = wxFontMapperBase::GetEncodingFromName(charset);
+#else

     m_encoding = wxFONTENCODING_SYSTEM;
     m_encoding = wxFONTENCODING_SYSTEM;

+#endif

 }
 
 wxCSConv::wxCSConv(wxFontEncoding encoding)
 }
 
 wxCSConv::wxCSConv(wxFontEncoding encoding)


@@ -2268,12 +2602,29 @@ void wxCSConv::SetName(const wxChar *charset)
     }
 }
 
     }
 }
 

+#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
 {
 wxMBConv *wxCSConv::DoCreate() const
 {

+#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
     // 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 )
+    if ( m_encoding == wxFONTENCODING_ISO8859_1 ||
+            m_encoding == wxFONTENCODING_DEFAULT )

     {
         // don't convert at all
         return NULL;
     {
         // don't convert at all
         return NULL;


@@ -2294,17 +2645,53 @@ wxMBConv *wxCSConv::DoCreate() const
 #endif // !wxUSE_FONTMAP
     {
         wxString name(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
 
 #if wxUSE_FONTMAP

-        if ( name.empty() )
-            name = wxFontMapper::Get()->GetEncodingName(m_encoding);
+            encoding =
+                wxFontMapperBase::Get()->CharsetToEncoding(name, false);

 #endif // wxUSE_FONTMAP
 #endif // wxUSE_FONTMAP

+        }
+#if wxUSE_FONTMAP
+        {
+            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(name);
-        if ( conv->IsOk() )
-            return conv;
+                wxMBConv_iconv *conv = new wxMBConv_iconv(it->second);
+                if ( conv->IsOk() )
+                    return conv;

 
 

-        delete conv;
+                delete conv;
+            }
+
+            const wxChar** names = wxFontMapperBase::GetAllEncodingNames(encoding);
+
+            for ( ; *names; ++names )
+            {
+                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
 
     }
 #endif // HAVE_ICONV
 


@@ -2324,11 +2711,17 @@ wxMBConv *wxCSConv::DoCreate() const
 #endif // wxHAVE_WIN32_MB2WC
 #if defined(__WXMAC__)
     {
 #endif // wxHAVE_WIN32_MB2WC
 #if defined(__WXMAC__)
     {

-        if ( m_name || ( m_encoding < wxFONTENCODING_UTF16BE ) )
+        // 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);
             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;
 
             if ( conv->IsOk() )
                  return conv;
 


@@ -2341,8 +2734,12 @@ wxMBConv *wxCSConv::DoCreate() const
         if ( m_name || ( m_encoding <= wxFONTENCODING_UTF16 ) )
         {
 
         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);
             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;
 
             if ( conv->IsOk() )
                  return conv;
 


@@ -2358,7 +2755,7 @@ wxMBConv *wxCSConv::DoCreate() const
         // 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
         // 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 = wxFontMapper::Get()->CharsetToEncoding(m_name, false);
+        enc = wxFontMapperBase::Get()->CharsetToEncoding(m_name, false);

     }
 #endif // wxUSE_FONTMAP
 
     }
 #endif // wxUSE_FONTMAP
 


@@ -2414,7 +2811,7 @@ wxMBConv *wxCSConv::DoCreate() const
                    m_name ? m_name
                       :
 #if wxUSE_FONTMAP
                    m_name ? m_name
                       :
 #if wxUSE_FONTMAP

-                         wxFontMapper::GetEncodingDescription(m_encoding).c_str()
+                         wxFontMapperBase::GetEncodingDescription(m_encoding).c_str()

 #else // !wxUSE_FONTMAP
                          wxString::Format(_("encoding %s"), m_encoding).c_str()
 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
 #else // !wxUSE_FONTMAP
                          wxString::Format(_("encoding %s"), m_encoding).c_str()
 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP


@@ -2511,13 +2908,19 @@ static wxCSConv wxConvISO8859_1Obj(wxFONTENCODING_ISO8859_1);
 static wxMBConvUTF7 wxConvUTF7Obj;
 static wxMBConvUTF8 wxConvUTF8Obj;
 
 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&) 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
 
 
 #else // !wxUSE_WCHAR_T
 


@@ -2528,5 +2931,3 @@ WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc,
                                 wxConvUTF8;
 
 #endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
                                 wxConvUTF8;
 
 #endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T

-
-