Always use standard mbstowcs() and wcstombs() functions.

Don't provide our own (not fully functional) definitions of them and always
use the system versions as we don't support OS X 10.2 which was the last
platform where these functions didn't exist/work.

See #15580.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75024 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/wxcrtbase.h

@@ -565,24 +565,6 @@ WXDLLIMPEXP_BASE wchar_t * wxCRT_GetenvW(const wchar_t *name);
     /* wcstoi doesn't exist */
 #endif
 
-#ifdef __DARWIN__
-    #if !defined(__WXOSX_IPHONE__) && MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_2
-        #define wxNEED_WX_MBSTOWCS
-    #endif
-#endif
-
-#ifdef wxNEED_WX_MBSTOWCS
-    /* even though they are defined and "implemented", they are bad and just
-       stubs so we need our own - we need these even in ANSI builds!! */
-    WXDLLIMPEXP_BASE size_t wxMbstowcs(wchar_t *, const char *, size_t);
-    WXDLLIMPEXP_BASE size_t wxWcstombs(char *, const wchar_t *, size_t);
-#else
-    #define wxMbstowcs mbstowcs
-    #define wxWcstombs wcstombs
-#endif
-
-
-
 /* -------------------------------------------------------------------------
                                 time.h
    ------------------------------------------------------------------------- */

src/common/wxcrt.cpp

@@ -89,7 +89,7 @@ WXDLLIMPEXP_BASE size_t wxMB2WC(wchar_t *buf, const char *psz, size_t n)
 #ifdef HAVE_WCSRTOMBS
     return mbsrtowcs(buf, &psz, n, &mbstate);
 #else
-    return wxMbstowcs(buf, psz, n);
+    return mbstowcs(buf, psz, n);
 #endif
   }
 
@@ -102,7 +102,7 @@ WXDLLIMPEXP_BASE size_t wxMB2WC(wchar_t *buf, const char *psz, size_t n)
 #ifdef HAVE_WCSRTOMBS
   return mbsrtowcs(NULL, &psz, 0, &mbstate);
 #else
-  return wxMbstowcs(NULL, psz, 0);
+  return mbstowcs(NULL, psz, 0);
 #endif
 }
 
@@ -122,14 +122,14 @@ WXDLLIMPEXP_BASE size_t wxWC2MB(char *buf, const wchar_t *pwz, size_t n)
 #ifdef HAVE_WCSRTOMBS
     return wcsrtombs(buf, &pwz, n, &mbstate);
 #else
-    return wxWcstombs(buf, pwz, n);
+    return wcstombs(buf, pwz, n);
 #endif
   }
 
 #ifdef HAVE_WCSRTOMBS
   return wcsrtombs(NULL, &pwz, 0, &mbstate);
 #else
-  return wxWcstombs(NULL, pwz, 0);
+  return wcstombs(NULL, pwz, 0);
 #endif
 }
 
@@ -737,54 +737,6 @@ int wxVsnprintf(wchar_t *str, size_t size, const wxString& format, va_list argpt
 // ctype.h stuff (currently unused)
 // ----------------------------------------------------------------------------
 
-#ifdef wxNEED_WX_MBSTOWCS
-
-WXDLLIMPEXP_BASE size_t wxMbstowcs (wchar_t * out, const char * in, size_t outlen)
-{
-    if (!out)
-    {
-        size_t outsize = 0;
-        while(*in++)
-            outsize++;
-        return outsize;
-    }
-
-    const char* origin = in;
-
-    while (outlen-- && *in)
-    {
-        *out++ = (wchar_t) *in++;
-    }
-
-    *out = '\0';
-
-    return in - origin;
-}
-
-WXDLLIMPEXP_BASE size_t wxWcstombs (char * out, const wchar_t * in, size_t outlen)
-{
-    if (!out)
-    {
-        size_t outsize = 0;
-        while(*in++)
-            outsize++;
-        return outsize;
-    }
-
-    const wchar_t* origin = in;
-
-    while (outlen-- && *in)
-    {
-        *out++ = (char) *in++;
-    }
-
-    *out = '\0';
-
-    return in - origin;
-}
-
-#endif // wxNEED_WX_MBSTOWCS
-
 #ifndef wxCRT_StrdupA
 WXDLLIMPEXP_BASE char *wxCRT_StrdupA(const char *s)
 {