Better approach to mbstowcs and wcstombs by TOYAMA Shin-ichi. Makes --uppercase working too for accented letters, discarding mtw.

src/tuxpaint.c

@@ -356,27 +356,8 @@ typedef struct safer_dirent
 #undef max
 #define mkdir(path,access)    _mkdir(path)
 
-static void mtw(wchar_t * wtok, char *tok, size_t size)
+#define mbstowcs(wtok, tok, size) MultiByteToWideChar(CP_UTF8,0,tok,-1,wtok,size)
-{
+#define wcstombs(tok, wtok, size) WideCharToMultiByte(CP_UTF8,0,wtok,-1,tok,size,NULL,NULL)
-  /* workaround using iconv to get a functionallity somewhat approximate as mbstowcs() */
-  Uint16 *ui16;
-
-  ui16 = malloc(size);
-  char *wrptr = (char *)ui16;
-  size_t in, out, n;
-  iconv_t trans;
-
-  in = size;
-  out = size;
-  n = size / sizeof(wchar_t);
-
-  trans = iconv_open("WCHAR_T", "UTF-8");
-  iconv(trans, (char **)&tok, &in, &wrptr, &out);
-  *((wchar_t *) wrptr) = L'\0';
-  swprintf(wtok, n, L"%ls", ui16);
-  free(ui16);
-  iconv_close(trans);
-}
 
 extern int win32_trash(const char *path);
 
@@ -23137,7 +23118,7 @@ static void load_info_about_label_surface(FILE * lfi)
       tmpstr = malloc(1024);
       wtmpstr = malloc(1024);
       fgets(tmpstr, 1024, lfi);
-      mtw(wtmpstr, tmpstr, 1024);
+      mbstowcs(wtmpstr, tmpstr, 1024);
       for (l = 0; l < new_node->save_texttool_len; l++)
         {
           new_node->save_texttool_str[l] = wtmpstr[l];