1 files changed, 52 insertions, 0 deletions
diff --git a/src/clojure/contrib/pprint/examples/hexdump.clj b/src/clojure/contrib/pprint/examples/hexdump.clj
new file mode 100644
index 00000000..0555b639
--- /dev/null
+++ b/src/clojure/contrib/pprint/examples/hexdump.clj
@@ -0,0 +1,52 @@
+;   Copyright (c) Tom Faulhaber, Dec 2008. All rights reserved.
+;   The use and distribution terms for this software are covered by the
+;   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+;   which can be found in the file epl-v10.html at the root of this distribution.
+;   By using this software in any fashion, you are agreeing to be bound by
+;   the terms of this license.
+;   You must not remove this notice, or any other, from this software.
+
+(ns clojure.contrib.pprint.examples.hexdump
+  (:use clojure.contrib.pprint)
+  (:gen-class (:main true)))
+
+(def *buffer-length* 1024)
+
+(defn zip-array [base-offset arr]
+  (let [grouped (partition 16 arr)]
+    (first (map-passing-context
+            (fn [line offset]
+              [[offset 
+                (map #(if (neg? %) (+ % 256) %) line)
+                (- 16 (count line))
+                (map #(if (<= 32 % 126) (char %) \.) line)]
+               (+ 16 offset)])
+            base-offset grouped))))
+
+
+(defn hexdump 
+  ([in-stream] (hexdump in-stream true 0))
+  ([in-stream out-stream] (hexdump [in-stream out-stream 0]))
+  ([in-stream out-stream offset] 
+     (let [buf (make-array Byte/TYPE *buffer-length*)]
+       (loop [offset offset
+              count (.read in-stream buf)]
+         (if (neg? count)
+           nil
+           (let [bytes (take count buf)
+                 zipped (zip-array offset bytes)]
+             (cl-format out-stream 
+                        "~:{~8,'0X: ~2{~8@{~#[   ~:;~2,'0X ~]~}  ~}~v@{   ~}~2{~8@{~A~} ~}~%~}" 
+                        zipped) 
+             (recur (+ offset *buffer-length*) (.read in-stream buf))))))))
+
+(defn hexdump-file 
+  ([file-name] (hexdump-file file-name true))
+  ([file-name stream] 
+     (with-open [s (java.io.FileInputStream. file-name)] 
+       (hexdump s))))
+
+;; I don't quite understand how to invoke main funcs w/o AOT yet
+(defn -main [& args]
+  (hexdump-file (first args)))
+