Implemented the various printf() functions under

Unicode with their GNU libc 2.2 funtions. This
    saves us some unicode<->ansi conversion and we
    no longer need the experimental printf() code
    in string.cpp. I had to implement wxSprintf()
    using wxSnprintf() as the former doesn't exist
    in Unicode GNU libc 2.2.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16442 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/string.h

@@ -165,16 +165,32 @@ inline int Stricmp(const char *psz1, const char *psz2)
 #endif  // OS/compiler
 }
 
+#ifndef wxSnprintf   
 // wxSnprintf() is like snprintf() if it's available and sprintf() (always
-// available, but dangerous!) if not
+// available, but dangerous!) if not.
 extern int WXDLLEXPORT wxSnprintf(wxChar *buf, size_t len,
                                   const wxChar *format,
                                   ...) ATTRIBUTE_PRINTF_3;
+#else
+// GNU libc 2.2 only has for wxSnprintf for Unicode called swprintf
+// so we imitate wxSprintf using it.
+extern int WXDLLEXPORT wxSprintf(wxChar *buf,
+                                  const wxChar *format,
+                                  ...) ATTRIBUTE_PRINTF_2;
+#endif
 
+#ifndef wxVsnprintf
 // and wxVsnprintf() is like vsnprintf() or vsprintf()
 extern int WXDLLEXPORT wxVsnprintf(wxChar *buf, size_t len,
                                    const wxChar *format,
                                    va_list argptr);
+#else
+// GNU libc 2.2 only has for wxVsnprintf for Unicode called vswprintf
+// so we imitate wxVsprintf using it.
+extern int WXDLLEXPORT wxVsprintf(wxChar *buf,
+                                  const wxChar *format,
+                                  va_list argptr);
+#endif
 
 // return an empty wxString
 class WXDLLEXPORT wxString; // not yet defined