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Add support for DirectByteBuffers when encoding #42

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Add support for DirectByteBuffers when encoding #42

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41 changes: 27 additions & 14 deletions src/gloss/io.clj
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@
[gloss.core.formats :as formats]
[gloss.data.bytes :as bytes])
(:import
[gloss.data.bytes.core
SingleBufferSequence]
[java.nio.channels
Channels]
[java.nio
Expand All @@ -37,12 +39,6 @@

;;;

(defn encode
"Turns a frame value into a sequence of ByteBuffers."
[frame val]
(let [codec (compile-frame frame)]
(write-bytes codec nil val)))

(defn encode-to-buffer
"Encodes a sequence of values, and writes them to a ByteBuffer."
[frame buf vals]
Expand All @@ -51,16 +47,33 @@
(doseq [v vals]
(write-bytes codec buf v))))

(defn encode
"Turns a frame value into a sequence of ByteBuffers."
([frame val]
(encode frame val false))
([frame val direct?]
(let [codec (compile-frame frame)]
(if direct?
(let [size (sizeof codec)
buf (ByteBuffer/allocateDirect size)]
(write-bytes codec buf val)
(SingleBufferSequence. (.rewind ^ByteBuffer buf) size))
(write-bytes codec nil val)))))

(defn encode-all
"Turns a sequence of frame values into a sequence of ByteBuffers."
[frame vals]
(let [codec (compile-frame frame)]
(if-let [size (sizeof codec)]
(let [buf (ByteBuffer/allocate (* size (count vals)))]
(encode-to-buffer codec buf vals)
[(.rewind buf)])
(apply concat
(map #(write-bytes codec nil %) vals)))))
([frame vals]
(encode-all frame vals false))
([frame vals direct?]
(let [codec (compile-frame frame)]
(if-let [size (sizeof codec)]
(let [buf (if direct?
(ByteBuffer/allocateDirect (* size (count vals)))
(ByteBuffer/allocate (* size (count vals))))]
(encode-to-buffer codec buf vals)
[(.rewind buf)])
(apply concat
(map #(write-bytes codec nil %) vals))))))

(defn encode-to-stream
"Encodes a sequence of values, and writes them to an OutputStream."
Expand Down