--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/jfr/writers/jfrEncoding.hpp	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_JFR_WRITERS_JFRENCODING_HPP
+#define SHARE_VM_JFR_WRITERS_JFRENCODING_HPP
+
+#include "jfr/writers/jfrEncoders.hpp"
+#include "memory/allocation.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+enum JfrStringEncoding {
+  NULL_STRING = 0,
+  EMPTY_STRING,
+  STRING_CONSTANT,
+  UTF8,
+  UTF16,
+  LATIN1,
+  NOF_STRING_ENCODINGS
+};
+
+template <typename IntegerEncoder, typename BaseEncoder>
+class EncoderHost : public AllStatic {
+ public:
+  template <typename T>
+  static u1* be_write(T value, u1* pos) {
+    return be_write(&value, 1, pos);
+  }
+
+  template <typename T>
+  static u1* be_write(const T* value, size_t len, u1* pos) {
+    assert(value != NULL, "invariant");
+    assert(pos != NULL, "invariant");
+    assert(len > 0, "invariant");
+    return pos + BaseEncoder::encode(value, len, pos);
+  }
+
+  template <typename T>
+  static u1* write_padded(T value, u1* pos) {
+    assert(pos != NULL, "invariant");
+    return write_padded(&value, 1, pos);
+  }
+
+  template <typename T>
+  static u1* write_padded(const T* value, size_t len, u1* pos) {
+    assert(value != NULL, "invariant");
+    assert(pos != NULL, "invariant");
+    assert(len > 0, "invariant");
+    return pos + IntegerEncoder::encode_padded(value, len, pos);
+  }
+
+  template <typename T>
+  static u1* write(T value, u1* pos) {
+    return write(&value, 1, pos);
+  }
+
+  template <typename T>
+  static u1* write(const T* value, size_t len, u1* pos) {
+    assert(value != NULL, "invariant");
+    assert(pos != NULL, "invariant");
+    assert(len > 0, "invariant");
+    return pos + IntegerEncoder::encode(value, len, pos);
+  }
+
+  static u1* write(bool value, u1* pos) {
+    return be_write((u1)value, pos);
+  }
+
+  static u1* write(float value, u1* pos) {
+    return be_write(*(u4*)&(value), pos);
+  }
+
+  static u1* write(double value, u1* pos) {
+    return be_write(*(u8*)&(value), pos);
+  }
+
+  static u1* write(const char* value, u1* pos) {
+    u2 len = 0;
+    if (value != NULL) {
+      len = MIN2<u2>(max_jushort, (jushort)strlen(value));
+    }
+    pos = write(len, pos);
+    if (len > 0) {
+      pos = be_write(value, len, pos);
+    }
+    return pos;
+  }
+
+  static u1* write(char* value, u1* pos) {
+    return write(const_cast<const char*>(value), pos);
+  }
+};
+
+typedef EncoderHost<BigEndianEncoderImpl, BigEndianEncoderImpl> BigEndianEncoder;
+typedef EncoderHost<Varint128EncoderImpl, BigEndianEncoderImpl> CompressedIntegerEncoder;
+
+#endif // SHARE_VM_JFR_WRITERS_JFRENCODING_HPP