Add wxUSE_ARCSTREAM so that other archive classes can be used without wxZip

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

diff --git a/src/common/strconv.cpp b/src/common/strconv.cpp
index e0e0def4dab52144752101e38bb899fc744842eb..5ceede42250f07aab2c5352388833b425d04c2a2 100644 (file)
--- a/src/common/strconv.cpp
+++ b/src/common/strconv.cpp
@@ -1,12 +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:      $Id$
 // Copyright:   (c) 1999 Ove Kaaven, Robert Roebling, Vaclav Slavik
 //              (c) 2000-2003 Vadim Zeitlin
 // Modified by:
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // 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
 /////////////////////////////////////////////////////////////////////////////
 


@@ -68,6 +70,7 @@
 
 #ifdef HAVE_ICONV
     #include <iconv.h>
 
 #ifdef HAVE_ICONV
     #include <iconv.h>

+    #include "wx/thread.h"

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


@@ -168,7 +171,7 @@ static size_t decode_utf16(const wxUint16* input, wxUint32& output)
 
 wxMBConv::~wxMBConv()
 {
 
 wxMBConv::~wxMBConv()
 {

-    // nothing to do here
+    // 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


@@ -215,6 +218,131 @@ 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 here instead of nLen
+        //here because XX2XX gives us the size of the output buffer,
+        //not neccessarly 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 here instead of nLen
+        //here because XX2XX gives us the size of the output buffer,
+        //not neccessarly the length of the string
+        szPos += wxWcslen(szPos) + 1;
+    }
+
+    //success - return actual length and the buffer
+    *pOutSize = nActualLength;
+    return theBuffer;  
+}
+

 // ----------------------------------------------------------------------------
 // wxMBConvLibc
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // wxMBConvLibc
 // ----------------------------------------------------------------------------


@@ -228,34 +356,208 @@ size_t wxMBConvLibc::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 {
     return wxWC2MB(buf, psz, n);
 }
 {
     return wxWC2MB(buf, psz, n);
 }

-

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

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

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

-#if 0
-static char utf7_setD[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                        "abcdefghijklmnopqrstuvwxyz"
-                        "0123456789'(),-./:?";
-static char utf7_setO[]="!\"#$%&*;<=>@[]^_`{|}";
-static char utf7_setB[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                        "abcdefghijklmnopqrstuvwxyz"
-                        "0123456789+/";
-#endif
+// Implementation (C) 2004 Fredrik Roubert
+
+//
+// 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
+};

 
 

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

 {
 {

-  return 0;
+    size_t len = 0;
+
+    while (*psz && ((!buf) || (len < n)))
+    {
+        unsigned char cc = *psz++;
+        if (cc != '+')
+        {
+            // plain ASCII char
+            if (buf)
+                *buf++ = cc;
+            len++;
+        }
+        else if (*psz == '-')
+        {
+            // encoded plus sign
+            if (buf)
+                *buf++ = cc;
+            len++;
+            psz++;
+        }
+        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++)
+            {
+                d <<= 6;
+                d += cc;
+                for (l += 6; l >= 8; lsb = !lsb)
+                {
+                    c = (unsigned char)((d >> (l -= 8)) % 256);
+                    if (lsb)
+                    {
+                        if (buf)
+                            *buf++ |= c;
+                        len ++;
+                    }
+                    else
+                        if (buf)
+                            *buf = (wchar_t)(c << 8);
+                }
+            }
+            if (*psz == '-')
+                psz++;
+        }
+    }
+    if (buf && (len < n))
+        *buf = 0;
+    return len;

 }
 
 }
 

-size_t wxMBConvUTF7::WC2MB(char * WXUNUSED(buf),
-                           const wchar_t * WXUNUSED(psz),
-                           size_t WXUNUSED(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

 {
 {

-  return 0;
+
+
+    size_t len = 0;
+
+    while (*psz && ((!buf) || (len < n)))
+    {
+        wchar_t cc = *psz++;
+        if (cc < 0x80 && utf7encode[cc] < 1)
+        {
+            // plain ASCII char
+            if (buf)
+                *buf++ = (char)cc;
+            len++;
+        }
+#ifndef WC_UTF16
+        else if (((wxUint32)cc) > 0xffff)
+           {
+            // no surrogate pair generation (yet?)
+            return (size_t)-1;
+        }
+#endif
+        else
+        {
+            if (buf)
+                *buf++ = '+';
+            len++;
+            if (cc != '+')
+            {
+                // 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;
+    return len;

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


@@ -845,12 +1147,13 @@ 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) && \


@@ -882,6 +1185,10 @@ protected:
     // the other direction
     iconv_t m2w,
             w2m;
     // 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
 
 private:
     // the name (for iconv_open()) of a wide char charset -- if none is


@@ -993,6 +1300,16 @@ wxMBConv_iconv::~wxMBConv_iconv()
 
 size_t wxMBConv_iconv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
 {
 
 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;


@@ -1050,6 +1367,11 @@ 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
 {

+#if wxUSE_THREADS
+    // NB: explained in MB2WC
+    wxMutexLocker lock(wxConstCast(this, wxMBConv_iconv)->m_iconvMutex);
+#endif
+    

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


@@ -1153,10 +1475,20 @@ 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...
+        int flags = m_CodePage == CP_UTF7 ? 0 : MB_ERR_INVALID_CHARS;
+

         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
                                 psz,            // input string
                                 -1,             // its length (NUL-terminated)
                                 buf,            // output string


@@ -1292,7 +1624,7 @@ private:
 
 #if defined(__WXCOCOA__)
 
 
 #if defined(__WXCOCOA__)
 

-// RN:  There is no UTF-32 support in either Core Foundation or 
+// 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).
 
 // Cocoa.  Strangely enough, internally Core Foundation uses
 // UTF 32 internally quite a bit - its just not public (yet).
 


@@ -1300,139 +1632,135 @@ private:
 #include <CoreFoundation/CFStringEncodingExt.h>
 
 CFStringEncoding wxCFStringEncFromFontEnc(wxFontEncoding encoding)
 #include <CoreFoundation/CFStringEncodingExt.h>
 
 CFStringEncoding wxCFStringEncFromFontEnc(wxFontEncoding encoding)

-{      
-       CFStringEncoding enc = 0 ;
-       if ( encoding == wxFONTENCODING_DEFAULT )
-       {
-#if wxUSE_GUI
-               encoding = wxFont::GetDefaultEncoding() ;
-#else
-               encoding = wxLocale::GetSystemEncoding() ;
-#endif
-       }
-       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 ;
-               case wxFONTENCODING_UTF7 : 
-               enc = kCFStringEncodingNonLossyASCII ;
-               break ;
-               case wxFONTENCODING_UTF8 : 
-               enc = kCFStringEncodingUTF8 ;
-               break ;
-               case wxFONTENCODING_EUC_JP : 
-               enc = kCFStringEncodingEUC_JP;
-               break ;
-               case wxFONTENCODING_UTF16 : 
+{
+    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 ;
             enc = kCFStringEncodingUnicode ;

-               break ;            
+            break ;

         case wxFONTENCODING_MACROMAN :
             enc = kCFStringEncodingMacRoman ;
             break ;
         case wxFONTENCODING_MACROMAN :
             enc = kCFStringEncodingMacRoman ;
             break ;


@@ -1550,253 +1878,14 @@ CFStringEncoding wxCFStringEncFromFontEnc(wxFontEncoding encoding)
         case wxFONTENCODING_MACGAELIC :
             enc = kCFStringEncodingMacGaelic ;
             break ;
         case wxFONTENCODING_MACGAELIC :
             enc = kCFStringEncodingMacGaelic ;
             break ;

-//        case wxFONTENCODING_MACKEYBOARD :
-//            enc = kCFStringEncodingMacKeyboardGlyphs ;
-//            break ;    
-               default :
-                       // because gcc is picky
-                       break ;
-       } ;
-       return enc ;
-}
-
-wxFontEncoding wxFontEncFromCFStringEnc(CFStringEncoding encoding)
-{      
-       wxFontEncoding enc = wxFONTENCODING_DEFAULT ;
-
-       switch( encoding)
-       {
-               case kCFStringEncodingISOLatin1  :
-               enc = wxFONTENCODING_ISO8859_1 ;
-               break ;
-               case kCFStringEncodingISOLatin2 :
-               enc = wxFONTENCODING_ISO8859_2;
-               break ;
-               case kCFStringEncodingISOLatin3 :
-               enc = wxFONTENCODING_ISO8859_3 ;
-               break ;
-               case kCFStringEncodingISOLatin4 :
-               enc = wxFONTENCODING_ISO8859_4;
-               break ;
-               case kCFStringEncodingISOLatinCyrillic :
-               enc = wxFONTENCODING_ISO8859_5;
-               break ;
-               case kCFStringEncodingISOLatinArabic :
-               enc = wxFONTENCODING_ISO8859_6;
-               break ;
-               case kCFStringEncodingISOLatinGreek :
-               enc = wxFONTENCODING_ISO8859_7;
-               break ;
-               case kCFStringEncodingISOLatinHebrew :
-               enc = wxFONTENCODING_ISO8859_8;
-               break ;
-               case kCFStringEncodingISOLatin5 :
-               enc = wxFONTENCODING_ISO8859_9;
-               break ;
-               case kCFStringEncodingISOLatin6 :
-               enc = wxFONTENCODING_ISO8859_10;
-               break ;
-               case kCFStringEncodingISOLatin7 :
-               enc = wxFONTENCODING_ISO8859_13;
-               break ;
-               case kCFStringEncodingISOLatin8 :
-               enc = wxFONTENCODING_ISO8859_14;
-               break ;
-               case kCFStringEncodingISOLatin9 :
-               enc =wxFONTENCODING_ISO8859_15 ;
-               break ;
-
-               case kCFStringEncodingKOI8_R :
-               enc = wxFONTENCODING_KOI8;
-               break ;
-
-//             case  : 
-//             enc = wxFONTENCODING_BULGARIAN;
-//             break ;
-
-               case kCFStringEncodingDOSLatinUS : 
-               enc = wxFONTENCODING_CP437;
-               break ;
-               case kCFStringEncodingDOSLatin1 :
-               enc = wxFONTENCODING_CP850;
-               break ;
-               case kCFStringEncodingDOSLatin2 : 
-               enc =wxFONTENCODING_CP852 ;
-               break ;
-               case kCFStringEncodingDOSCyrillic :
-               enc = wxFONTENCODING_CP855;
-               break ;
-               case kCFStringEncodingDOSRussian :
-               enc = wxFONTENCODING_CP866;
-               break ;
-               case kCFStringEncodingDOSThai :
-               enc =wxFONTENCODING_CP874 ;
-               break ;
-               case kCFStringEncodingDOSJapanese : 
-               enc = wxFONTENCODING_CP932;
-               break ;
-               case kCFStringEncodingDOSChineseSimplif : 
-               enc = wxFONTENCODING_CP936;
-               break ;
-               case kCFStringEncodingDOSKorean : 
-               enc = wxFONTENCODING_CP949;
-               break ;
-               case kCFStringEncodingDOSChineseTrad : 
-               enc = wxFONTENCODING_CP950;
-               break ;
-               
-               case kCFStringEncodingWindowsLatin2 : 
-               enc = wxFONTENCODING_CP1250;
-               break ;
-               case kCFStringEncodingWindowsCyrillic : 
-               enc = wxFONTENCODING_CP1251;
-               break ;
-               case kCFStringEncodingWindowsLatin1 : 
-               enc = wxFONTENCODING_CP1252;
-               break ;
-               case kCFStringEncodingWindowsGreek : 
-               enc = wxFONTENCODING_CP1253;
-               break ;
-               case kCFStringEncodingWindowsLatin5 : 
-               enc = wxFONTENCODING_CP1254;
-               break ;
-               case kCFStringEncodingWindowsHebrew : 
-               enc = wxFONTENCODING_CP1255;
-               break ;
-               case kCFStringEncodingWindowsArabic : 
-               enc = wxFONTENCODING_CP1256;
-               break ;
-               case kCFStringEncodingWindowsBalticRim : 
-               enc =wxFONTENCODING_CP1257 ;
-               break ;
-               case kCFStringEncodingEUC_JP : 
-               enc = wxFONTENCODING_EUC_JP;
-               break ;
-        case kCFStringEncodingUnicode :
-            enc = wxFONTENCODING_UTF16;
-            break;
-        case kCFStringEncodingMacRoman :
-            enc = wxFONTENCODING_MACROMAN ;
-            break ;
-        case kCFStringEncodingMacJapanese :
-            enc = wxFONTENCODING_MACJAPANESE ;
-            break ;
-        case kCFStringEncodingMacChineseTrad :
-            enc = wxFONTENCODING_MACCHINESETRAD ;
-            break ;
-        case kCFStringEncodingMacKorean :
-            enc = wxFONTENCODING_MACKOREAN ;
-            break ;
-        case kCFStringEncodingMacArabic :
-            enc =wxFONTENCODING_MACARABIC ;
-            break ;
-        case kCFStringEncodingMacHebrew :
-            enc = wxFONTENCODING_MACHEBREW ;
-            break ;
-        case kCFStringEncodingMacGreek :
-            enc = wxFONTENCODING_MACGREEK ;
-            break ;
-        case kCFStringEncodingMacCyrillic :
-            enc = wxFONTENCODING_MACCYRILLIC ;
-            break ;
-        case kCFStringEncodingMacDevanagari :
-            enc = wxFONTENCODING_MACDEVANAGARI ;
-            break ;
-        case kCFStringEncodingMacGurmukhi :
-            enc = wxFONTENCODING_MACGURMUKHI ;
-            break ;
-        case kCFStringEncodingMacGujarati :
-            enc = wxFONTENCODING_MACGUJARATI ;
-            break ;
-        case kCFStringEncodingMacOriya :
-            enc =wxFONTENCODING_MACORIYA ;
-            break ;
-        case kCFStringEncodingMacBengali :
-            enc =wxFONTENCODING_MACBENGALI ;
-            break ;
-        case kCFStringEncodingMacTamil :
-            enc = wxFONTENCODING_MACTAMIL ;
-            break ;
-        case kCFStringEncodingMacTelugu :
-            enc = wxFONTENCODING_MACTELUGU ;
-            break ;
-        case kCFStringEncodingMacKannada :
-            enc = wxFONTENCODING_MACKANNADA ;
-            break ;
-        case kCFStringEncodingMacMalayalam :
-            enc = wxFONTENCODING_MACMALAJALAM ;
-            break ;
-        case kCFStringEncodingMacSinhalese :
-            enc = wxFONTENCODING_MACSINHALESE ;
-            break ;
-        case kCFStringEncodingMacBurmese :
-            enc = wxFONTENCODING_MACBURMESE ;
-            break ;
-        case kCFStringEncodingMacKhmer :
-            enc = wxFONTENCODING_MACKHMER ;
-            break ;
-        case kCFStringEncodingMacThai :
-            enc = wxFONTENCODING_MACTHAI ;
-            break ;
-        case kCFStringEncodingMacLaotian :
-            enc = wxFONTENCODING_MACLAOTIAN ;
-            break ;
-        case kCFStringEncodingMacGeorgian :
-            enc = wxFONTENCODING_MACGEORGIAN ;
-            break ;
-        case kCFStringEncodingMacArmenian :
-            enc = wxFONTENCODING_MACARMENIAN ;
-            break ;
-        case kCFStringEncodingMacChineseSimp :
-            enc = wxFONTENCODING_MACCHINESESIMP ;
-            break ;
-        case kCFStringEncodingMacTibetan :
-            enc = wxFONTENCODING_MACTIBETAN ;
-            break ;
-        case kCFStringEncodingMacMongolian :
-            enc = wxFONTENCODING_MACMONGOLIAN ;
-            break ;
-        case kCFStringEncodingMacEthiopic :
-            enc = wxFONTENCODING_MACETHIOPIC ;
+//      case wxFONTENCODING_MACKEYBOARD :
+//          enc = kCFStringEncodingMacKeyboardGlyphs ;
+//          break ;
+        default :
+            // because gcc is picky

             break ;
             break ;

-        case kCFStringEncodingMacCentralEurRoman:
-            enc = wxFONTENCODING_MACCENTRALEUR  ;
-            break ;
-        case kCFStringEncodingMacVietnamese:
-            enc = wxFONTENCODING_MACVIATNAMESE  ;
-            break ;
-        case kCFStringEncodingMacExtArabic :
-            enc = wxFONTENCODING_MACARABICEXT ;
-            break ;
-        case kCFStringEncodingMacSymbol :
-            enc = wxFONTENCODING_MACSYMBOL ;
-            break ;
-        case kCFStringEncodingMacDingbats :
-            enc = wxFONTENCODING_MACDINGBATS ;
-            break ;
-        case kCFStringEncodingMacTurkish :
-            enc = wxFONTENCODING_MACTURKISH ;
-            break ;
-        case kCFStringEncodingMacCroatian :
-            enc = wxFONTENCODING_MACCROATIAN ;
-            break ;
-        case kCFStringEncodingMacIcelandic :
-            enc = wxFONTENCODING_MACICELANDIC ;
-            break ;
-        case kCFStringEncodingMacRomanian :
-            enc = wxFONTENCODING_MACROMANIAN ;
-            break ;
-        case kCFStringEncodingMacCeltic :
-            enc = wxFONTENCODING_MACCELTIC ;
-            break ;
-        case kCFStringEncodingMacGaelic :
-            enc = wxFONTENCODING_MACGAELIC ;
-            break ;
-//        case kCFStringEncodingMacKeyboardGlyphs :
-//            enc = wxFONTENCODING_MACKEYBOARD ;
-//            break ;       
-       } ;
-       return enc ;
+    } ;
+    return enc ;

 }
 
 class wxMBConv_cocoa : public wxMBConv
 }
 
 class wxMBConv_cocoa : public wxMBConv


@@ -1823,90 +1912,59 @@ public:
 
     void Init( CFStringEncoding encoding)
     {
 
     void Init( CFStringEncoding encoding)
     {

-        m_char_encoding = encoding ;
-        m_unicode_encoding = kCFStringEncodingUnicode;
+        m_encoding = encoding ;

     }
 
     size_t MB2WC(wchar_t * szOut, const char * szUnConv, size_t nOutSize) const
     {
         wxASSERT(szUnConv);
     }
 
     size_t MB2WC(wchar_t * szOut, const char * szUnConv, size_t nOutSize) const
     {
         wxASSERT(szUnConv);

-        
-        size_t nBufSize = strlen(szUnConv) + 1;
-        size_t nRealOutSize;

 
 

-        UniChar* szUniCharBuffer       = (UniChar*) szOut; 
-        wchar_t* szConvBuffer          = szOut;
-        
-        if (szConvBuffer == NULL && nOutSize != 0)
-        {
-            szConvBuffer = new wchar_t[nOutSize] ;
-        }
-
-#if SIZEOF_WCHAR_T == 4
-        szUniCharBuffer = new UniChar[nOutSize];
-#endif
-
-        CFDataRef theData = CFDataCreateWithBytesNoCopy (
-                                            NULL,      //allocator 
-                                            (const UInt8*)szUnConv, 
-                                            nBufSize - 1,
-                                            NULL       //deallocator
-                                            ); 
-
-        wxASSERT(theData);
-
-        CFStringRef theString = CFStringCreateFromExternalRepresentation (
-                                                NULL,
-                                                theData,
-                                                m_char_encoding 
+        CFStringRef theString = CFStringCreateWithBytes (
+                                                NULL, //the allocator
+                                                (const UInt8*)szUnConv,
+                                                strlen(szUnConv),
+                                                m_encoding,
+                                                false //no BOM/external representation

                                                 );
 
         wxASSERT(theString);
 
                                                 );
 
         wxASSERT(theString);
 

-        if (nOutSize == 0)
+        size_t nOutLength = CFStringGetLength(theString);
+
+        if (szOut == NULL)

         {
         {

-            nRealOutSize = CFStringGetLength(theString) + 1;

             CFRelease(theString);
             CFRelease(theString);

-            return nRealOutSize - 1;
+            return nOutLength;

         }
         }

-        
-        CFRange theRange = { 0, CFStringGetLength(theString) };
-        
+
+        CFRange theRange = { 0, nOutSize };
+
+#if SIZEOF_WCHAR_T == 4
+        UniChar* szUniCharBuffer = new UniChar[nOutSize];
+#endif
+ 

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

-        
-        nRealOutSize = (CFStringGetLength(theString) + 1);
-        

         CFRelease(theString);
         CFRelease(theString);

-        
-        szUniCharBuffer[nRealOutSize-1] = '\0' ;
+
+        szUniCharBuffer[nOutLength] = '\0' ;

 
 #if SIZEOF_WCHAR_T == 4
         wxMBConvUTF16 converter ;
 
 #if SIZEOF_WCHAR_T == 4
         wxMBConvUTF16 converter ;

-        converter.MB2WC(szConvBuffer  , (const char*)szUniCharBuffer , nRealOutSize ) ;
+        converter.MB2WC(szOut, (const char*)szUniCharBuffer , nOutSize ) ;

         delete[] szUniCharBuffer;
 #endif
         delete[] szUniCharBuffer;
 #endif

-        if ( szOut == NULL )
-            delete [] szConvBuffer;
-
-        return nRealOutSize ;
+    
+        return nOutLength;

     }
 
     size_t WC2MB(char *szOut, const wchar_t *szUnConv, size_t nOutSize) const
     {
     }
 
     size_t WC2MB(char *szOut, const wchar_t *szUnConv, size_t nOutSize) const
     {

-        size_t nBufSize = wxWcslen(szUnConv) + 1;
+        wxASSERT(szUnConv);
+        

         size_t nRealOutSize;
         size_t nRealOutSize;

-        char* szBuffer = szOut;
+        size_t nBufSize = wxWcslen(szUnConv);

         UniChar* szUniBuffer = (UniChar*) szUnConv;
         UniChar* szUniBuffer = (UniChar*) szUnConv;

-        
-        if (szOut == NULL)
-        {
-            // worst case
-            nRealOutSize = ((nBufSize - 1) << 1)+1 ;
-            szBuffer = new char[ nRealOutSize ] ;
-        }
-        else
-            nRealOutSize = nOutSize;

 
 #if SIZEOF_WCHAR_T == 4
         wxMBConvUTF16BE converter ;
 
 #if SIZEOF_WCHAR_T == 4
         wxMBConvUTF16BE converter ;


@@ -1914,69 +1972,58 @@ public:
         szUniBuffer = new UniChar[ (nBufSize / sizeof(UniChar)) + 1] ;
         converter.WC2MB( (char*) szUniBuffer , szUnConv, nBufSize + sizeof(UniChar)) ;
         nBufSize /= sizeof(UniChar);
         szUniBuffer = new UniChar[ (nBufSize / sizeof(UniChar)) + 1] ;
         converter.WC2MB( (char*) szUniBuffer , szUnConv, nBufSize + sizeof(UniChar)) ;
         nBufSize /= sizeof(UniChar);

-        ++nBufSize;

 #endif
 
         CFStringRef theString = CFStringCreateWithCharactersNoCopy(
                                 NULL, //allocator
                                 szUniBuffer,
                                 nBufSize,
 #endif
 
         CFStringRef theString = CFStringCreateWithCharactersNoCopy(
                                 NULL, //allocator
                                 szUniBuffer,
                                 nBufSize,

-                                NULL //deallocator
+                                kCFAllocatorNull //deallocator - we want to deallocate it ourselves

                             );
                             );

-        
+

         wxASSERT(theString);
         wxASSERT(theString);

-        
+

         //Note that CER puts a BOM when converting to unicode
         //Note that CER puts a BOM when converting to unicode

-        //so we may want to check and use getchars instead in that case
-        CFDataRef theData = CFStringCreateExternalRepresentation(
-                                NULL, //allocator
-                                theString,
-                                m_char_encoding,
-                                0 //what to put in characters that can't be converted -
-                                    //0 tells CFString to return NULL if it meets such a character
+        //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

                         );
                         );

+        }

 
 

-        if(!theData)
-            return (size_t)-1;
-        

         CFRelease(theString);
         CFRelease(theString);

-        
-        nRealOutSize = CFDataGetLength(theData);

 
 

-        if ( szOut == NULL )
-            delete[] szBuffer;
+#if SIZEOF_WCHAR_T == 4
+        delete[] szUniBuffer;
+#endif

 
 

-        if(nOutSize == 0)
-        {
-//TODO: This gets flagged as a non-malloced address by the debugger...
-//#if SIZEOF_WCHAR_T == 4
-//        delete[] szUniBuffer;
-//#endif
-            CFRelease(theData);
-            return nRealOutSize - 1;
-        }
-        
-        CFRange theRange = {0, CFDataGetLength(theData) };
-        CFDataGetBytes(theData, theRange, (UInt8*) szBuffer);
-            
-        CFRelease(theData);    
-        
-//TODO: This gets flagged as a non-malloced address by the debugger...
-//#if SIZEOF_WCHAR_T == 4
-//        delete[] szUniBuffer;
-//#endif

         return  nRealOutSize - 1;
     }
 
     bool IsOk() const
         return  nRealOutSize - 1;
     }
 
     bool IsOk() const

-    { 
-        //TODO: check for invalid en/de/coding
-        return true; 
+    {
+        return m_encoding != kCFStringEncodingInvalidId && 
+              CFStringIsEncodingAvailable(m_encoding);

     }
 
 private:
     }
 
 private:

-    CFStringEncoding m_char_encoding ;
-    CFStringEncoding m_unicode_encoding ;
+    CFStringEncoding m_encoding ;

 };
 
 #endif // defined(__WXCOCOA__)
 };
 
 #endif // defined(__WXCOCOA__)


@@ -2038,7 +2085,8 @@ public:
 
         if (buf == NULL)
         {
 
         if (buf == NULL)
         {

-            n = byteInLen ;
+            //apple specs say at least 32
+            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 ) ;


@@ -2078,8 +2126,8 @@ public:
 
         if (buf == NULL)
         {
 
         if (buf == NULL)
         {

-            // worst case
-            n = byteInLen * 2 ;
+            //apple specs say at least 32
+            n = wxMax( 32 , ((byteInLen / SIZEOF_WCHAR_T) * 8) + SIZEOF_WCHAR_T );

             tbuf = (char*) malloc( n ) ;
         }
 
             tbuf = (char*) malloc( n ) ;
         }
 


@@ -2104,7 +2152,22 @@ public:
 
         size_t res = byteOutLen ;
         if ( buf  && res < n)
 
         size_t res = byteOutLen ;
         if ( buf  && res < n)

+        {

             buf[res] = 0;
             buf[res] = 0;

+            
+            //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;
+            }
+        }

 
         return res ;
     }
 
         return res ;
     }


@@ -2161,7 +2224,10 @@ 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;
     }
 


@@ -2169,7 +2235,10 @@ 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;
     }