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diff --git a/intl/icu/source/i18n/ztrans.h b/intl/icu/source/i18n/ztrans.h
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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* Copyright (C) 2009-2016, International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*/
+#ifndef __ZTRANS_H
+#define __ZTRANS_H
+
+/**
+ * \file 
+ * \brief C API: Time zone transition classes
+ */
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/uobject.h"
+
+#ifndef UCNV_H
+
+/**
+ * A TimeZoneTransition.  Use the ztrans_* API to manipulate.  Create with
+ * ztrans_open*, and destroy with ztrans_close.
+ */
+struct ZTrans;
+typedef struct ZTrans ZTrans;
+
+#endif
+
+/**
+ * Constructs a time zone transition with the time and the rules before/after
+ * the transition.
+ * 
+ * @param time  The time of transition in milliseconds since the base time.
+ * @param from  The time zone rule used before the transition.
+ * @param to    The time zone rule used after the transition.
+ */
+U_CAPI ZTrans* U_EXPORT2
+ztrans_open(UDate time, const void* from, const void* to);
+
+/**
+ * Constructs an empty <code>TimeZoneTransition</code>
+ */
+U_CAPI ZTrans* U_EXPORT2
+ztrans_openEmpty();
+
+/**
+ * Disposes of the storage used by a ZTrans object.  This function should
+ * be called exactly once for objects returned by ztrans_open*.
+ * @param trans the object to dispose of
+ */
+U_CAPI void U_EXPORT2
+ztrans_close(ZTrans *trans);
+
+/**
+ * Returns a copy of this object.
+ * @param rule the original ZRule
+ * @return the newly allocated copy of the ZRule
+ */
+U_CAPI ZTrans* U_EXPORT2
+ztrans_clone(ZTrans *trans);
+
+/**
+ * Returns true if trans1 is identical to trans2
+ * and vis versa.
+ * @param trans1 to be checked for containment
+ * @param trans2 to be checked for containment
+ * @return true if the test condition is met
+ */
+U_CAPI UBool U_EXPORT2
+ztrans_equals(const ZTrans* trans1, const ZTrans* trans2);
+
+/**
+ * Returns the time of transition in milliseconds.
+ * param trans, the transition to use
+ * @return The time of the transition in milliseconds since the 1970 Jan 1 epoch time.
+ */
+U_CAPI UDate U_EXPORT2
+ztrans_getTime(ZTrans* trans);
+
+/**
+ * Sets the time of transition in milliseconds.
+ * param trans, the transition to use
+ * @param time The time of the transition in milliseconds since the 1970 Jan 1 epoch time.
+ */
+U_CAPI void U_EXPORT2
+ztrans_setTime(ZTrans* trans, UDate time);
+
+/**
+ * Returns the rule used before the transition.
+ * param trans, the transition to use
+ * @return The time zone rule used after the transition.
+ */
+U_CAPI void* U_EXPORT2
+ztrans_getFrom(ZTrans* & trans);
+
+/**
+ * Sets the rule used before the transition.  The caller remains
+ * responsible for deleting the TimeZoneRule object.
+ * param trans, the transition to use
+ * param trans, the transition to use
+ * @param from The time zone rule used before the transition.
+ */
+U_CAPI void U_EXPORT2
+ztrans_setFrom(ZTrans* trans, const void* from);
+
+/**
+ * Adopts the rule used before the transition.  The caller must
+ * not delete the TimeZoneRule object passed in.
+ * param trans, the transition to use
+ * @param from The time zone rule used before the transition.
+ */
+U_CAPI void U_EXPORT2
+ztrans_adoptFrom(ZTrans* trans, void* from);
+
+/**
+ * Returns the rule used after the transition.
+ * param trans, the transition to use
+ * @return The time zone rule used after the transition.
+ */
+U_CAPI void* U_EXPORT2
+ztrans_getTo(ZTrans* trans);
+
+/**
+ * Sets the rule used after the transition.  The caller remains
+ * responsible for deleting the TimeZoneRule object.
+ * param trans, the transition to use
+ * @param to The time zone rule used after the transition.
+ */
+U_CAPI void U_EXPORT2
+ztrans_setTo(ZTrans* trans, const void* to);
+
+/**
+ * Adopts the rule used after the transition.  The caller must
+ * not delete the TimeZoneRule object passed in.
+ * param trans, the transition to use
+ * @param to The time zone rule used after the transition.
+ */
+U_CAPI void U_EXPORT2
+ztrans_adoptTo(ZTrans* trans, void* to);
+
+/**
+ * Return the class ID for this class. This is useful only for comparing to
+ * a return value from getDynamicClassID(). For example:
+ * <pre>
+ * .   Base* polymorphic_pointer = createPolymorphicObject();
+ * .   if (polymorphic_pointer->getDynamicClassID() ==
+ * .       erived::getStaticClassID()) ...
+ * </pre>
+ * param trans, the transition to use
+ * @return          The class ID for all objects of this class.
+ */
+U_CAPI UClassID U_EXPORT2
+ztrans_getStaticClassID(ZTrans* trans);
+
+/**
+ * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This
+ * method is to implement a simple version of RTTI, since not all C++
+ * compilers support genuine RTTI. Polymorphic operator==() and clone()
+ * methods call this method.
+ *
+ * param trans, the transition to use
+ * @return          The class ID for this object. All objects of a
+ *                  given class have the same class ID.  Objects of
+ *                  other classes have different class IDs.
+ */
+U_CAPI UClassID U_EXPORT2
+ztrans_getDynamicClassID(ZTrans* trans);
+
+#endif
+
+#endif