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diff --git a/cil/src/escape.ml b/cil/src/escape.ml
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+(*
+ *
+ * Copyright (c) 2003, 
+ *  Ben Liblit          <liblit@cs.berkeley.edu>
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. The names of the contributors may not be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *)
+
+
+(** OCaml types used to represent wide characters and strings *)
+type wchar = int64
+type wstring = wchar list
+
+
+let escape_char = function
+  | '\007' -> "\\a"
+  | '\b' -> "\\b"
+  | '\t' -> "\\t"
+  | '\n' -> "\\n"
+  | '\011' -> "\\v"
+  | '\012' -> "\\f"
+  | '\r' -> "\\r"
+  | '"' -> "\\\""
+  | '\'' -> "\\'"
+  | '\\' -> "\\\\"
+  | ' ' .. '~' as printable -> String.make 1 printable
+  | unprintable -> Printf.sprintf "\\%03o" (Char.code unprintable)
+
+let escape_string str =
+  let length = String.length str in
+  let buffer = Buffer.create length in
+  for index = 0 to length - 1 do
+    Buffer.add_string buffer (escape_char (String.get str index))
+  done;
+  Buffer.contents buffer
+
+(* a wide char represented as an int64 *)
+let escape_wchar =
+  (* limit checks whether upper > probe *)
+  let limit upper probe = (Int64.to_float (Int64.sub upper probe)) > 0.5 in
+  let fits_byte = limit (Int64.of_int 0x100) in
+  let fits_octal_escape = limit (Int64.of_int 0o1000) in
+  let fits_universal_4 = limit (Int64.of_int 0x10000) in
+  let fits_universal_8 = limit (Int64.of_string "0x100000000") in
+  fun charcode ->
+    if fits_byte charcode then
+      escape_char (Char.chr (Int64.to_int charcode))
+    else if fits_octal_escape charcode then
+      Printf.sprintf "\\%03Lo" charcode
+    else if fits_universal_4 charcode then
+      Printf.sprintf "\\u%04Lx" charcode
+    else if fits_universal_8 charcode then
+      Printf.sprintf "\\u%04Lx" charcode
+    else
+      invalid_arg "Cprint.escape_string_intlist"
+
+(* a wide string represented as a list of int64s *)
+let escape_wstring (str : int64 list) =
+  let length = List.length str in
+  let buffer = Buffer.create length in
+  let append charcode =
+    let addition = escape_wchar charcode in
+    Buffer.add_string buffer addition
+  in
+  List.iter append str;
+  Buffer.contents buffer