diff --git a/SWIG/Source/Swig/include.c b/SWIG/Source/Swig/include.c
index 79213c754..a53be11b1 100644
--- a/SWIG/Source/Swig/include.c
+++ b/SWIG/Source/Swig/include.c
@@ -143,6 +143,7 @@ Swig_read_file(FILE *f) {
  * Opens a file and returns it as a string.
  * ----------------------------------------------------------------------------- */
 
+static int readbytes = 0;
 DOHString *
 Swig_include(const DOHString_or_char *name) {
   FILE         *f;
@@ -156,9 +157,15 @@ Swig_include(const DOHString_or_char *name) {
   Seek(str,0,SEEK_SET);
   Setfile(str,lastpath);
   Setline(str,1);
+  readbytes += Len(str);
   return str;
 }
 
+int
+Swig_bytes_read() {
+  return readbytes;
+}
+
 /* -----------------------------------------------------------------------------
  * Swig_insert_file()
  *
diff --git a/SWIG/Source/Swig/swig.h b/SWIG/Source/Swig/swig.h
index c906851d9..e5082e1df 100644
--- a/SWIG/Source/Swig/swig.h
+++ b/SWIG/Source/Swig/swig.h
@@ -35,6 +35,7 @@ extern FILE       *Swig_open(const DOHString_or_char *name);
 extern DOHString  *Swig_read_file(FILE *f);
 extern DOHString  *Swig_include(const DOHString_or_char *name);
 extern int         Swig_insert_file(const DOHString_or_char *name, DOHFile *outfile);
+extern int         Swig_bytes_read();
 
 #define  SWIG_FILE_DELIMETER   "/"