set eol-style

[wxWidgets.git] / include / wx / strconv.h

diff --git a/include/wx/strconv.h b/include/wx/strconv.h
index 877c44d1223886cfb44f2acf27a0da5d70e09265..1edf4f5082c7af2cc1bea6139feb0440ca5410bb 100644 (file)
--- a/include/wx/strconv.h
+++ b/include/wx/strconv.h
@@ -1,19 +1,20 @@
 ///////////////////////////////////////////////////////////////////////////////
 // Name:        strconv.h
 // Purpose:     conversion routines for char sets any Unicode
 ///////////////////////////////////////////////////////////////////////////////
 // Name:        strconv.h
 // Purpose:     conversion routines for char sets any Unicode

-// Author:      Robert Roebling, Ove Kaaven
+// Author:      Ove Kaaven, Robert Roebling, Vadim Zeitlin

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

-// Copyright:   (c) 1998 Ove Kaaven, Robert Roebling, Vadim Zeitlin
+// Copyright:   (c) 1998 Ove Kaaven, Robert Roebling
+//              (c) 1998-2006 Vadim Zeitlin

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

-#ifndef _WX_WXSTRCONVH__
-#define _WX_WXSTRCONVH__
+#ifndef _WX_STRCONV_H_
+#define _WX_STRCONV_H_

 
 #include "wx/defs.h"
 
 #include "wx/defs.h"

-#include "wx/wxchar.h"
+#include "wx/chartype.h"

 #include "wx/buffer.h"
 
 #ifdef __DIGITALMARS__
 #include "wx/buffer.h"
 
 #ifdef __DIGITALMARS__


@@ -28,9 +29,15 @@
 
 #if wxUSE_WCHAR_T
 
 
 #if wxUSE_WCHAR_T
 

+class WXDLLIMPEXP_FWD_BASE wxString;
+

 // the error value returned by wxMBConv methods
 #define wxCONV_FAILED ((size_t)-1)
 
 // the error value returned by wxMBConv methods
 #define wxCONV_FAILED ((size_t)-1)
 

+// the default value for some length parameters meaning that the string is
+// NUL-terminated
+#define wxNO_LEN ((size_t)-1)
+

 // ----------------------------------------------------------------------------
 // wxMBConv (abstract base class for conversions)
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // wxMBConv (abstract base class for conversions)
 // ----------------------------------------------------------------------------


@@ -40,6 +47,9 @@
 // don't let the fact that the existing classes implement MB2WC/WC2MB() instead
 // confuse you.
 //
 // don't let the fact that the existing classes implement MB2WC/WC2MB() instead
 // confuse you.
 //

+// You also have to implement Clone() to allow copying the conversions
+// polymorphically.
+//

 // And you might need to override GetMBNulLen() as well.
 class WXDLLIMPEXP_BASE wxMBConv
 {
 // And you might need to override GetMBNulLen() as well.
 class WXDLLIMPEXP_BASE wxMBConv
 {


@@ -51,12 +61,13 @@ public:
     // characters, not bytes) of the converted string including any trailing
     // L'\0' or (possibly multiple) '\0'(s). If the conversion fails or if
     // there is not enough space for everything, including the trailing NUL
     // characters, not bytes) of the converted string including any trailing
     // L'\0' or (possibly multiple) '\0'(s). If the conversion fails or if
     // there is not enough space for everything, including the trailing NUL

-    // character(s), in the output buffer, (size_t)-1 is returned.
+    // character(s), in the output buffer, wxCONV_FAILED is returned.

     //
     // In the special case when dstLen is 0 (outputBuf may be NULL then) the
     // return value is the length of the needed buffer but nothing happens
     //
     // In the special case when dstLen is 0 (outputBuf may be NULL then) the
     // return value is the length of the needed buffer but nothing happens

-    // otherwise. If srcLen is -1, the entire string, up to and including the
-    // trailing NUL(s), is converted, otherwise exactly srcLen bytes are.
+    // otherwise. If srcLen is wxNO_LEN, the entire string, up to and
+    // including the trailing NUL(s), is converted, otherwise exactly srcLen
+    // bytes are.

     //
     // Typical usage:
     //
     //
     // Typical usage:
     //


@@ -67,10 +78,10 @@ public:
     //          conv.ToWChar(wbuf, dstLen, src);
     //
     virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
     //          conv.ToWChar(wbuf, dstLen, src);
     //
     virtual size_t ToWChar(wchar_t *dst, size_t dstLen,

-                           const char *src, size_t srcLen = -1) const;
+                           const char *src, size_t srcLen = wxNO_LEN) const;

 
     virtual size_t FromWChar(char *dst, size_t dstLen,
 
     virtual size_t FromWChar(char *dst, size_t dstLen,

-                             const wchar_t *src, size_t srcLen = -1) const;
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;

 
 
     // Convenience functions for translating NUL-terminated strings: returns
 
 
     // Convenience functions for translating NUL-terminated strings: returns


@@ -126,6 +137,12 @@ public:
     // encoding
     static size_t GetMaxMBNulLen() { return 4 /* for UTF-32 */; }
 
     // encoding
     static size_t GetMaxMBNulLen() { return 4 /* for UTF-32 */; }
 

+#if wxUSE_UNICODE_UTF8
+    // return true if the converter's charset is UTF-8, i.e. char* strings
+    // decoded using this object can be directly copied to wxString's internal
+    // storage without converting to WC and than back to UTF-8 MB string
+    virtual bool IsUTF8() const { return false; }
+#endif

 
     // The old conversion functions. The existing classes currently mostly
     // implement these ones but we're in transition to using To/FromWChar()
 
     // The old conversion functions. The existing classes currently mostly
     // implement these ones but we're in transition to using To/FromWChar()


@@ -147,6 +164,9 @@ public:
     virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const;
 
 
     virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const;
 
 

+    // make a heap-allocated copy of this object
+    virtual wxMBConv *Clone() const = 0;
+

     // virtual dtor for any base class
     virtual ~wxMBConv();
 };
     // virtual dtor for any base class
     virtual ~wxMBConv();
 };


@@ -161,6 +181,12 @@ class WXDLLIMPEXP_BASE wxMBConvLibc : public wxMBConv
 public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
 public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;

+
+    virtual wxMBConv *Clone() const { return new wxMBConvLibc; }
+
+#if wxUSE_UNICODE_UTF8
+    virtual bool IsUTF8() const { return wxLocaleIsUtf8; }
+#endif

 };
 
 #ifdef __UNIX__
 };
 
 #ifdef __UNIX__


@@ -175,7 +201,12 @@ public:
 class WXDLLIMPEXP_BASE wxConvBrokenFileNames : public wxMBConv
 {
 public:
 class WXDLLIMPEXP_BASE wxConvBrokenFileNames : public wxMBConv
 {
 public:

-    wxConvBrokenFileNames(const wxChar *charset);
+    wxConvBrokenFileNames(const wxString& charset);
+    wxConvBrokenFileNames(const wxConvBrokenFileNames& conv)
+        : wxMBConv(),
+          m_conv(conv.m_conv ? conv.m_conv->Clone() : NULL)
+    {
+    }

     virtual ~wxConvBrokenFileNames() { delete m_conv; }
 
     virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const
     virtual ~wxConvBrokenFileNames() { delete m_conv; }
 
     virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const


@@ -194,9 +225,17 @@ public:
         return m_conv->GetMBNulLen();
     }
 
         return m_conv->GetMBNulLen();
     }
 

+#if wxUSE_UNICODE_UTF8
+    virtual bool IsUTF8() const { return m_conv->IsUTF8(); }
+#endif
+
+    virtual wxMBConv *Clone() const { return new wxConvBrokenFileNames(*this); }
+

 private:
     // the conversion object we forward to
     wxMBConv *m_conv;
 private:
     // the conversion object we forward to
     wxMBConv *m_conv;

+
+    DECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames)

 };
 
 #endif // __UNIX__
 };
 
 #endif // __UNIX__


@@ -210,16 +249,41 @@ class WXDLLIMPEXP_BASE wxMBConvUTF7 : public wxMBConv
 public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
 public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;

+
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF7; }

 };
 
 // ----------------------------------------------------------------------------
 // wxMBConvUTF8 (for conversion using UTF8 encoding)
 // ----------------------------------------------------------------------------
 
 };
 
 // ----------------------------------------------------------------------------
 // wxMBConvUTF8 (for conversion using UTF8 encoding)
 // ----------------------------------------------------------------------------
 

-class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConv
+// this is the real UTF-8 conversion class, it has to be called "strict UTF-8"
+// for compatibility reasons: the wxMBConvUTF8 class below also supports lossy
+// conversions if it is created with non default options
+class WXDLLIMPEXP_BASE wxMBConvStrictUTF8 : public wxMBConv

 {
 public:
 {
 public:

-    enum {
+    // compiler-generated default ctor and other methods are ok
+
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+
+    virtual wxMBConv *Clone() const { return new wxMBConvStrictUTF8(); }
+
+#if wxUSE_UNICODE_UTF8
+    // NB: other mapping modes are not, strictly speaking, UTF-8, so we can't
+    //     take the shortcut in that case
+    virtual bool IsUTF8() const { return true; }
+#endif
+};
+
+class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConvStrictUTF8
+{
+public:
+    enum
+    {

         MAP_INVALID_UTF8_NOT = 0,
         MAP_INVALID_UTF8_TO_PUA = 1,
         MAP_INVALID_UTF8_TO_OCTAL = 2
         MAP_INVALID_UTF8_NOT = 0,
         MAP_INVALID_UTF8_TO_PUA = 1,
         MAP_INVALID_UTF8_TO_OCTAL = 2


@@ -229,6 +293,14 @@ public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
 
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
 

+    virtual wxMBConv *Clone() const { return new wxMBConvUTF8(m_options); }
+
+#if wxUSE_UNICODE_UTF8
+    // NB: other mapping modes are not, strictly speaking, UTF-8, so we can't
+    //     take the shortcut in that case
+    virtual bool IsUTF8() const { return m_options == MAP_INVALID_UTF8_NOT; }
+#endif
+

 private:
     int m_options;
 };
 private:
     int m_options;
 };


@@ -240,7 +312,16 @@ private:
 class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv
 {
 public:
 class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv
 {
 public:

-    virtual size_t GetMBNulLen() const { return 2; }
+    enum { BYTES_PER_CHAR = 2 };
+
+    virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
+
+protected:
+    // return the length of the buffer using srcLen if it's not wxNO_LEN and
+    // computing the length ourselves if it is; also checks that the length is
+    // even if specified as we need an entire number of UTF-16 characters and
+    // returns wxNO_LEN which indicates error if it is odd
+    static size_t GetLength(const char *src, size_t srcLen);

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -250,8 +331,11 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF16LE : public wxMBConvUTF16Base
 {
 public:
 class WXDLLIMPEXP_BASE wxMBConvUTF16LE : public wxMBConvUTF16Base
 {
 public:

-    virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
-    virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF16LE; }

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -261,8 +345,11 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF16BE : public wxMBConvUTF16Base
 {
 public:
 class WXDLLIMPEXP_BASE wxMBConvUTF16BE : public wxMBConvUTF16Base
 {
 public:

-    virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
-    virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF16BE; }

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -272,7 +359,15 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv
 {
 public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv
 {
 public:

-    virtual size_t GetMBNulLen() const { return 4; }
+    enum { BYTES_PER_CHAR = 4 };
+
+    virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
+
+protected:
+    // this is similar to wxMBConvUTF16Base method with the same name except
+    // that, of course, it verifies that length is divisible by 4 if given and
+    // not by 2
+    static size_t GetLength(const char *src, size_t srcLen);

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -282,8 +377,11 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32LE : public wxMBConvUTF32Base
 {
 public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32LE : public wxMBConvUTF32Base
 {
 public:

-    virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
-    virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF32LE; }

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -293,8 +391,11 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32BE : public wxMBConvUTF32Base
 {
 public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32BE : public wxMBConvUTF32Base
 {
 public:

-    virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
-    virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF32BE; }

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -308,7 +409,7 @@ class WXDLLIMPEXP_BASE wxCSConv : public wxMBConv
 public:
     // we can be created either from charset name or from an encoding constant
     // but we can't have both at once
 public:
     // we can be created either from charset name or from an encoding constant
     // but we can't have both at once

-    wxCSConv(const wxChar *charset);
+    wxCSConv(const wxString& charset);

     wxCSConv(wxFontEncoding encoding);
 
     wxCSConv(const wxCSConv& conv);
     wxCSConv(wxFontEncoding encoding);
 
     wxCSConv(const wxCSConv& conv);


@@ -316,11 +417,24 @@ public:
 
     wxCSConv& operator=(const wxCSConv& conv);
 
 
     wxCSConv& operator=(const wxCSConv& conv);
 

+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;

     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
     virtual size_t GetMBNulLen() const;
 
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
     virtual size_t GetMBNulLen() const;
 

-    void Clear() ;
+#if wxUSE_UNICODE_UTF8
+    virtual bool IsUTF8() const;
+#endif
+
+    virtual wxMBConv *Clone() const { return new wxCSConv(*this); }
+
+    void Clear();
+
+    // return true if the conversion could be initilized successfully
+    bool IsOk() const;

 
 private:
     // common part of all ctors
 
 private:
     // common part of all ctors


@@ -334,12 +448,12 @@ private:
 
     // set the name (may be only called when m_name == NULL), makes copy of
     // charset string
 
     // set the name (may be only called when m_name == NULL), makes copy of
     // charset string

-    void SetName(const wxChar *charset);
+    void SetName(const char *charset);

 
 
     // note that we can't use wxString here because of compilation
     // dependencies: we're included from wx/string.h
 
 
     // note that we can't use wxString here because of compilation
     // dependencies: we're included from wx/string.h

-    wxChar *m_name;
+    char *m_name;

     wxFontEncoding m_encoding;
 
     // use CreateConvIfNeeded() before accessing m_convReal!
     wxFontEncoding m_encoding;
 
     // use CreateConvIfNeeded() before accessing m_convReal!


@@ -352,14 +466,35 @@ private:
 // declare predefined conversion objects
 // ----------------------------------------------------------------------------
 
 // declare predefined conversion objects
 // ----------------------------------------------------------------------------
 

+// Note: this macro is an implementation detail (see the comment in
+// strconv.cpp). The wxGet_XXX() and wxGet_XXXPtr() functions shouldn't be
+// used by user code and neither should XXXPtr, use the wxConvXXX macro
+// instead.
+#define WX_DECLARE_GLOBAL_CONV(klass, name)                             \
+    extern WXDLLIMPEXP_DATA_BASE(klass*) name##Ptr;                     \
+    extern WXDLLIMPEXP_BASE klass* wxGet_##name##Ptr();                 \
+    inline klass& wxGet_##name()                                        \
+    {                                                                   \
+        if ( !name##Ptr )                                               \
+            name##Ptr = wxGet_##name##Ptr();                            \
+        return *name##Ptr;                                              \
+    }
+
+

 // conversion to be used with all standard functions affected by locale, e.g.
 // strtol(), strftime(), ...
 // conversion to be used with all standard functions affected by locale, e.g.
 // strtol(), strftime(), ...

-extern WXDLLIMPEXP_DATA_BASE(wxMBConv&) wxConvLibc;
+WX_DECLARE_GLOBAL_CONV(wxMBConv, wxConvLibc)
+#define wxConvLibc wxGet_wxConvLibc()

 
 // conversion ISO-8859-1/UTF-7/UTF-8 <-> wchar_t
 
 // conversion ISO-8859-1/UTF-7/UTF-8 <-> wchar_t

-extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvISO8859_1;
-extern WXDLLIMPEXP_DATA_BASE(wxMBConvUTF7&) wxConvUTF7;
-extern WXDLLIMPEXP_DATA_BASE(wxMBConvUTF8&) wxConvUTF8;
+WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvISO8859_1)
+#define wxConvISO8859_1 wxGet_wxConvISO8859_1()
+
+WX_DECLARE_GLOBAL_CONV(wxMBConvStrictUTF8, wxConvUTF8)
+#define wxConvUTF8 wxGet_wxConvUTF8()
+
+WX_DECLARE_GLOBAL_CONV(wxMBConvUTF7, wxConvUTF7)
+#define wxConvUTF7 wxGet_wxConvUTF7()

 
 // conversion used for the file names on the systems where they're not Unicode
 // (basically anything except Windows)
 
 // conversion used for the file names on the systems where they're not Unicode
 // (basically anything except Windows)


@@ -377,9 +512,17 @@ extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName;
 // default in a couple of places inside wx (initially same as wxConvLibc)
 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
 
 // default in a couple of places inside wx (initially same as wxConvLibc)
 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
 

-// ???
-extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal;
+// the conversion corresponding to the current locale
+WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvLocal)
+#define wxConvLocal wxGet_wxConvLocal()

 
 

+// the conversion corresponding to the encoding of the standard UI elements
+//
+// by default this is the same as wxConvLocal but may be changed if the program
+// needs to use a fixed encoding
+extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI;
+
+#undef WX_DECLARE_GLOBAL_CONV

 
 // ----------------------------------------------------------------------------
 // endianness-dependent conversions
 
 // ----------------------------------------------------------------------------
 // endianness-dependent conversions


@@ -397,13 +540,7 @@ extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal;
 // filename conversion macros
 // ----------------------------------------------------------------------------
 
 // filename conversion macros
 // ----------------------------------------------------------------------------
 

-// filenames are multibyte on Unix and probably widechar on Windows?
-#if defined(__UNIX__) || defined(__BORLANDC__) || defined(__WXMAC__ )
-    #define wxMBFILES 1
-#else
-    #define wxMBFILES 0
-#endif
-
+// filenames are multibyte on Unix and widechar on Windows

 #if wxMBFILES && wxUSE_UNICODE
     #define wxFNCONV(name) wxConvFileName->cWX2MB(name)
     #define wxFNSTRINGCAST wxMBSTRINGCAST
 #if wxMBFILES && wxUSE_UNICODE
     #define wxFNCONV(name) wxConvFileName->cWX2MB(name)
     #define wxFNSTRINGCAST wxMBSTRINGCAST


@@ -450,12 +587,26 @@ extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
 #if wxUSE_UNICODE
     #define wxConvertWX2MB(s)   wxConvCurrent->cWX2MB(s)
     #define wxConvertMB2WX(s)   wxConvCurrent->cMB2WX(s)
 #if wxUSE_UNICODE
     #define wxConvertWX2MB(s)   wxConvCurrent->cWX2MB(s)
     #define wxConvertMB2WX(s)   wxConvCurrent->cMB2WX(s)

+
+    // these functions should be used when the conversions really, really have
+    // to succeed (usually because we pass their results to a standard C
+    // function which would crash if we passed NULL to it), so these functions
+    // always return a valid pointer if their argument is non-NULL
+
+    // this function safety is achieved by trying wxConvLibc first, wxConvUTF8
+    // next if it fails and, finally, wxConvISO8859_1 which always succeeds
+    extern WXDLLIMPEXP_BASE wxWCharBuffer wxSafeConvertMB2WX(const char *s);
+
+    // this function uses wxConvLibc and wxConvUTF8(MAP_INVALID_UTF8_TO_OCTAL)
+    // if it fails
+    extern WXDLLIMPEXP_BASE wxCharBuffer wxSafeConvertWX2MB(const wchar_t *ws);

 #else // ANSI
     // no conversions to do
     #define wxConvertWX2MB(s)   (s)
     #define wxConvertMB2WX(s)   (s)
 #else // ANSI
     // no conversions to do
     #define wxConvertWX2MB(s)   (s)
     #define wxConvertMB2WX(s)   (s)

+    #define wxSafeConvertMB2WX(s) (s)
+    #define wxSafeConvertWX2MB(s) (s)

 #endif // Unicode/ANSI
 
 #endif // Unicode/ANSI
 

-#endif
-  // _WX_WXSTRCONVH__
+#endif // _WX_STRCONV_H_