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+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// limitations under the License.
+
+#ifndef V8_EXTENSIONS_I18N_COLLATOR_H_
+#define V8_EXTENSIONS_I18N_COLLATOR_H_
+
+#include "unicode/uversion.h"
+#include "v8.h"
+
+namespace U_ICU_NAMESPACE {
+class Collator;
+class UnicodeString;
+}
+
+namespace v8_i18n {
+
+class Collator {
+ public:
+  static void JSCreateCollator(const v8::FunctionCallbackInfo<v8::Value>& args);
+
+  // Helper methods for various bindings.
+
+  // Unpacks collator object from corresponding JavaScript object.
+  static icu::Collator* UnpackCollator(v8::Handle<v8::Object> obj);
+
+  // Release memory we allocated for the Collator once the JS object that
+  // holds the pointer gets garbage collected.
+  static void DeleteCollator(v8::Isolate* isolate,
+                             v8::Persistent<v8::Object>* object,
+                             void* param);
+
+  // Compare two strings and returns -1, 0 and 1 depending on
+  // whether string1 is smaller than, equal to or larger than string2.
+  static void JSInternalCompare(
+      const v8::FunctionCallbackInfo<v8::Value>& args);
+
+ private:
+  Collator() {}
+};
+
+}  // namespace v8_i18n
+
+#endif  // V8_EXTENSIONS_I18N_COLLATOR_H_