import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

intl/unicharutil/util/GreekCasing.h

@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GreekCasing_h_
+#define GreekCasing_h_
+
+#include <stdint.h>
+#include "mozilla/Attributes.h"
+
+namespace mozilla {
+
+class GreekCasing {
+  // When doing an Uppercase transform in Greek, we need to keep track of the
+  // current state while iterating through the string, to recognize and process
+  // diphthongs correctly. For clarity, we define a state for each vowel and
+  // each vowel with accent, although a few of these do not actually need any
+  // special treatment and could be folded into kStart.
+private:
+  enum GreekStates {
+    kStart,
+    kAlpha,
+    kEpsilon,
+    kEta,
+    kIota,
+    kOmicron,
+    kUpsilon,
+    kOmega,
+    kAlphaAcc,
+    kEpsilonAcc,
+    kEtaAcc,
+    kIotaAcc,
+    kOmicronAcc,
+    kUpsilonAcc,
+    kOmegaAcc,
+    kOmicronUpsilon,
+    kDiaeresis
+  };
+
+public:
+  class State {
+  public:
+    State()
+      : mState(kStart)
+    {
+    }
+
+    MOZ_IMPLICIT State(const GreekStates& aState)
+      : mState(aState)
+    {
+    }
+
+    void Reset()
+    {
+      mState = kStart;
+    }
+
+    operator GreekStates() const
+    {
+      return mState;
+    }
+
+  private:
+    GreekStates mState;
+  };
+
+  static uint32_t UpperCase(uint32_t aCh, State& aState);
+};
+
+} // namespace mozilla
+
+#endif