add Find_last_separator_unicode() function

src/io.c

@@ -258,7 +258,7 @@ char * Find_last_separator(const char * str)
   const char * position = NULL;
   for (; *str != '\0'; str++)
     if (*str == PATH_SEPARATOR[0]
-#ifdef __WIN32__    
+#if defined(__WIN32__) || defined(WIN32)
      || *str == '/'
 #elif __AROS__
      || *str == ':'
@@ -267,6 +267,22 @@ char * Find_last_separator(const char * str)
       position = str;
   return (char *)position;
 }
+
+word * Find_last_separator_unicode(const word * str)
+{
+  const word * position = NULL;
+  for (; *str != 0; str++)
+    if (*str == (byte)PATH_SEPARATOR[0]
+#if defined(__WIN32__) || defined(WIN32)
+     || *str == '/'
+#elif __AROS__
+     || *str == ':'
+#endif
+     )
+      position = str;
+  return (word *)position;
+}
+
 // Récupère la partie "nom de file seul" d'un chemin
 void Extract_filename(char *dest, const char *source)
 {

src/io.h

@@ -98,6 +98,9 @@ void Extract_path(char *dest, const char *source);
 /// Finds the rightmost path separator in a full filename. Used to separate directory from file.
 char * Find_last_separator(const char * str);
 
+/// Finds the rightmost path separator in a full filename in unicode. Used to separate directory from file.
+word * Find_last_separator_unicode(const word * str);
+
 /// default path separator character
 #if defined(WIN32) || defined(__MINT__)
   #define PATH_SEPARATOR "\\"