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1 ;;; hexdump.clj -- part of the pretty printer for Clojure
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2
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3 ;; by Tom Faulhaber
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4 ;; April 3, 2009
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5
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6 ; Copyright (c) Tom Faulhaber, Dec 2008. All rights reserved.
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7 ; The use and distribution terms for this software are covered by the
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8 ; Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
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9 ; which can be found in the file epl-v10.html at the root of this distribution.
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10 ; By using this software in any fashion, you are agreeing to be bound by
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11 ; the terms of this license.
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12 ; You must not remove this notice, or any other, from this software.
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13
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14 ;; This example is a classic hexdump program written using cl-format.
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15
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16 ;; For some local color, it was written in Dulles Airport while waiting for a flight
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17 ;; home to San Francisco.
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18
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19 (ns clojure.contrib.pprint.examples.hexdump
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20 (:use clojure.contrib.pprint
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21 clojure.contrib.pprint.utilities)
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22 (:gen-class (:main true)))
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23
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24 (def *buffer-length* 1024)
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25
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26 (defn zip-array [base-offset arr]
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27 (let [grouped (partition 16 arr)]
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28 (first (map-passing-context
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29 (fn [line offset]
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30 [[offset
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31 (map #(if (neg? %) (+ % 256) %) line)
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32 (- 16 (count line))
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33 (map #(if (<= 32 % 126) (char %) \.) line)]
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34 (+ 16 offset)])
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35 base-offset grouped))))
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36
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37
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38 (defn hexdump
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39 ([in-stream] (hexdump in-stream true 0))
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40 ([in-stream out-stream] (hexdump [in-stream out-stream 0]))
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41 ([in-stream out-stream offset]
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42 (let [buf (make-array Byte/TYPE *buffer-length*)]
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43 (loop [offset offset
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44 count (.read in-stream buf)]
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45 (if (neg? count)
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46 nil
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47 (let [bytes (take count buf)
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48 zipped (zip-array offset bytes)]
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49 (cl-format out-stream
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50 "~:{~8,'0X: ~2{~8@{~#[ ~:;~2,'0X ~]~} ~}~v@{ ~}~2{~8@{~A~} ~}~%~}"
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51 zipped)
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52 (recur (+ offset *buffer-length*) (.read in-stream buf))))))))
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53
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54 (defn hexdump-file
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55 ([file-name] (hexdump-file file-name true))
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56 ([file-name stream]
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57 (with-open [s (java.io.FileInputStream. file-name)]
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58 (hexdump s))))
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59
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60 ;; I don't quite understand how to invoke main funcs w/o AOT yet
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61 (defn -main [& args]
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62 (hexdump-file (first args)))
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63
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