如何解析Clojure中的二进制文件

问题描述：

在clojure中解析二进制数据的最干净的方法是什么？
我需要能够同样干净地读/写文件或套接字。

例如：

What is the cleanest way to parse binary data in clojure? I need to be able to read/write equally cleanly to a file or a socket.

something like:


  (read-data source-of-data) 
  => { :index 42 , :block-size 4 , data-size: 31415, :data (1 2 3 4 ...)}

这将是真的很棒，以某种方式定义结构一次，并使读写函数使用相同的定义。

and the reverse for putting data back. It would be really great to somehow define the structure once and have the read and write functions use the same definition.

答

光泽

Gloss makes it easy to define binary formats at the byte level for both reading and writing.

(defcodec example-codec
  [:id       :uint32
   :msg-type (enum :byte {:a \A, :b \B})
   :status   (string :ascii :length 11)])

(def buffer (byte-array 16))

(.read (input-stream "filename.bin") buffer)
(decode example-codec buffer)

(encode example-codec {:id 42, :msg-type :a, :status "A-OKAY"})

bit-map 函数允许位级格式，但定义的位数必须被8整除，因此字节仍然排成一行。

The bit-map function allows bit level formats, but the number of bits defined must be divisible by 8 so the bytes still line up.

还有字节规格。

如何解析Clojure中的二进制文件

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