Add zmq_z85_decode support

src/main/c++/zmq.cpp

@@ -294,7 +294,15 @@ Java_org_zeromq_jni_ZMQ_zmq_1z85_1encode (JNIEnv *env, jclass c, jobject dest, j
 JNIEXPORT jboolean JNICALL
 Java_org_zeromq_jni_ZMQ_zmq_1z85_1decode (JNIEnv *env, jclass c, jbyteArray dest, jstring data)
 {
+#if ZMQ_VERSION >= ZMQ_MAKE_VERSION(4,0,0)
+    jbyte *buf = env->GetByteArrayElements (dest, 0);
+    const char *encoded = env->GetStringUTFChars (data, NULL);
+    zmq_z85_decode((uint8_t *) buf, const_cast<char *>(encoded));
+    env->ReleaseByteArrayElements (dest, buf, 0);
+    return true;
+#else
     return false;
+#endif
 }
 
 JNIEXPORT jboolean JNICALL

src/test/clojure/zeromq/zmq.clj

@@ -177,6 +177,9 @@
 (defn z85-encode [dest buf]
   (ZMQ/zmq_z85_encode dest buf))
 
+(defn z85-dencode [dest buf]
+  (ZMQ/zmq_z85_decode dest buf))
+
 (defn socket [context socket-type]
   (if-let [type (socket-types socket-type)]
     (->ManagedSocket (ZMQ/zmq_socket (:address context) type))

src/test/clojure/zeromq/zmq_tcp.clj

@@ -145,3 +145,9 @@
         char-buffer (CharBuffer/allocate 10)]
     (zmq/z85-encode char-buffer raw-bytes)
     (is (= "HelloWorld") (str char-buffer))))
+
+(deftest z85-dencoding-test
+  (let [expected (byte-array (map unchecked-byte [0x86 0x4F 0xD2 0x6F 0xB5 0x59 0xF7 0x5B]))
+        dest (byte-array 8)]
+    (zmq/z85-dencode dest "HelloWorld")
+    (is (java.util.Arrays/equals expected dest))))