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// © 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"
/**
* A TimeZoneTransition. Use the ztrans_* API to manipulate. Create with
* ztrans_open*, and destroy with ztrans_close.
*/
struct ZTrans;
typedef struct ZTrans ZTrans;
/**
* 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
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