src/third_party/icu/source/i18n/vzone.h - cobalt - Git at Google

 /*
 *******************************************************************************
 * Copyright (C) 2009-2011, International Business Machines Corporation and
 * others. All Rights Reserved.
 *******************************************************************************
 */

 /**
 * \file
 * \brief C API: RFC2445 VTIMEZONE support
 *
 * <p>This is a C wrapper around the C++ VTimeZone class.</p>
 */

 #ifndef __VZONE_H
 #define __VZONE_H

 #include "unicode/utypes.h"

 #if !UCONFIG_NO_FORMATTING

 #include "ztrans.h"

 #ifndef UCNV_H
 struct VZone;
 /**
  * A UnicodeSet.  Use the vzone_* API to manipulate.  Create with
  * vzone_open*, and destroy with vzone_close.
  */
 typedef struct VZone VZone;
 #endif

 /*********************************************************************
  * VZone API
  *********************************************************************/

 /**
  * Creates a vzone from the given time zone ID.
  * @param ID The time zone ID, such as America/New_York
  * @param idLength, length of the ID parameter
  * @return A vzone object initialized by the time zone ID,
  * or NULL when the ID is unknown.
  */
 U_CAPI VZone* U_EXPORT2
 vzone_openID(const UChar* ID, int32_t idLength);

 /**
  * Create a vzone instance by RFC2445 VTIMEZONE data
  * @param vtzdata The string including VTIMEZONE data block
  * @param vtzdataLength, length of the vtzdata
  * @param status Output param to filled in with a success or an error.
  * @return A vzone initialized by the VTIMEZONE data or
  * NULL if failed to load the rule from the VTIMEZONE data.
  */
 U_CAPI VZone* U_EXPORT2
 vzone_openData(const UChar* vtzdata, int32_t vtzdataLength, UErrorCode& status);

 /**
  * Disposes of the storage used by a VZone object.  This function should
  * be called exactly once for objects returned by vzone_open*.
  * @param set the object to dispose of
  */
 U_CAPI void U_EXPORT2
 vzone_close(VZone* zone);

 /**
  * Returns a copy of this object.
  * @param zone the original vzone
  * @return the newly allocated copy of the vzone
  */
 U_CAPI VZone* U_EXPORT2
 vzone_clone(const VZone *zone);

 /**
  * Returns true if zone1 is identical to zone2
  * and vis versa.
  * @param zone1 to be checked for containment
  * @param zone2 to be checked for containment
  * @return true if the test condition is met
  */
 U_CAPI UBool U_EXPORT2
 vzone_equals(const VZone* zone1, const VZone* zone2);

 /**
  * Gets the RFC2445 TZURL property value.  When a vzone instance was
  * created from VTIMEZONE data, the initial value is set by the TZURL
  * property value in the data.  Otherwise, the initial value is not set.
  * @param zone, the vzone to use
  * @param url Receives the RFC2445 TZURL property value.
  * @param urlLength, length of the url
  * @return TRUE if TZURL attribute is available and value is set.
  */
 U_CAPI UBool U_EXPORT2
 vzone_getTZURL(VZone* zone, UChar* & url, int32_t & urlLength);

 /**
  * Sets the RFC2445 TZURL property value.
  * @param zone, the vzone to use
  * @param url The TZURL property value.
  * @param urlLength, length of the url
  */
 U_CAPI void U_EXPORT2
 vzone_setTZURL(VZone* zone, UChar* url, int32_t urlLength);

 /**
  * Gets the RFC2445 LAST-MODIFIED property value.  When a vzone instance
  * was created from VTIMEZONE data, the initial value is set by the
  * LAST-MODIFIED property value in the data.  Otherwise, the initial value
  * is not set.
  * @param zone, the vzone to use
  * @param lastModified Receives the last modified date.
  * @return TRUE if lastModified attribute is available and value is set.
  */
 U_CAPI UBool U_EXPORT2
 vzone_getLastModified(VZone* zone, UDate& lastModified);

 /**
  * Sets the RFC2445 LAST-MODIFIED property value.
  * @param zone, the vzone to use
  * @param lastModified The LAST-MODIFIED date.
  */
 U_CAPI void U_EXPORT2
 vzone_setLastModified(VZone* zone, UDate lastModified);

 /**
  * Writes RFC2445 VTIMEZONE data for this time zone
  * @param zone, the vzone to use
  * @param result Output param to filled in with the VTIMEZONE data.
  * @param resultLength, length of the result output
  * @param status Output param to filled in with a success or an error.
  */
 U_CAPI void U_EXPORT2
 vzone_write(VZone* zone, UChar* & result, int32_t & resultLength, UErrorCode& status);

 /**
  * Writes RFC2445 VTIMEZONE data for this time zone applicalbe
  * for dates after the specified start time.
  * @param zone, the vzone to use
  * @param start The start date.
  * @param result Output param to filled in with the VTIMEZONE data.
  * @param resultLength, length of the result output
  * @param status Output param to filled in with a success or an error.
  */
 U_CAPI void U_EXPORT2
 vzone_writeFromStart(VZone* zone, UDate start, UChar* & result, int32_t & resultLength, UErrorCode& status);

 /**
  * Writes RFC2445 VTIMEZONE data applicalbe for the specified date.
  * Some common iCalendar implementations can only handle a single time
  * zone property or a pair of standard and daylight time properties using
  * BYDAY rule with day of week (such as BYDAY=1SUN).  This method produce
  * the VTIMEZONE data which can be handled these implementations.  The rules
  * produced by this method can be used only for calculating time zone offset
  * around the specified date.
  * @param zone, the vzone to use
  * @param time The date used for rule extraction.
  * @param result Output param to filled in with the VTIMEZONE data.
  * @param status Output param to filled in with a success or an error.
  */
 U_CAPI void U_EXPORT2
 vzone_writeSimple(VZone* zone, UDate time, UChar* & result, int32_t & resultLength, UErrorCode& status);

 /**
  * Returns the TimeZone's adjusted GMT offset (i.e., the number of milliseconds to add
  * to GMT to get local time in this time zone, taking daylight savings time into
  * account) as of a particular reference date.  The reference date is used to determine
  * whether daylight savings time is in effect and needs to be figured into the offset
  * that is returned (in other words, what is the adjusted GMT offset in this time zone
  * at this particular date and time?).  For the time zones produced by createTimeZone(),
  * the reference data is specified according to the Gregorian calendar, and the date
  * and time fields are local standard time.
  *
  * <p>Note: Don't call this method. Instead, call the getOffset(UDate...) overload,
  * which returns both the raw and the DST offset for a given time. This method
  * is retained only for backward compatibility.
  *
  * @param zone, the vzone to use
  * @param era        The reference date's era
  * @param year       The reference date's year
  * @param month      The reference date's month (0-based; 0 is January)
  * @param day        The reference date's day-in-month (1-based)
  * @param dayOfWeek  The reference date's day-of-week (1-based; 1 is Sunday)
  * @param millis     The reference date's milliseconds in day, local standard time
  * @param status     Output param to filled in with a success or an error.
  * @return           The offset in milliseconds to add to GMT to get local time.
  */
 U_CAPI int32_t U_EXPORT2
 vzone_getOffset(VZone* zone, uint8_t era, int32_t year, int32_t month, int32_t day,
                 uint8_t dayOfWeek, int32_t millis, UErrorCode& status);

 /**
  * Gets the time zone offset, for current date, modified in case of
  * daylight savings. This is the offset to add *to* UTC to get local time.
  *
  * <p>Note: Don't call this method. Instead, call the getOffset(UDate...) overload,
  * which returns both the raw and the DST offset for a given time. This method
  * is retained only for backward compatibility.
  *
  * @param zone, the vzone to use
  * @param era        The reference date's era
  * @param year       The reference date's year
  * @param month      The reference date's month (0-based; 0 is January)
  * @param day        The reference date's day-in-month (1-based)
  * @param dayOfWeek  The reference date's day-of-week (1-based; 1 is Sunday)
  * @param millis     The reference date's milliseconds in day, local standard time
  * @param monthLength The length of the given month in days.
  * @param status     Output param to filled in with a success or an error.
  * @return           The offset in milliseconds to add to GMT to get local time.
  */
 U_CAPI int32_t U_EXPORT2
 vzone_getOffset2(VZone* zone, uint8_t era, int32_t year, int32_t month, int32_t day,
                 uint8_t dayOfWeek, int32_t millis,
                 int32_t monthLength, UErrorCode& status);

 /**
  * Returns the time zone raw and GMT offset for the given moment
  * in time.  Upon return, local-millis = GMT-millis + rawOffset +
  * dstOffset.  All computations are performed in the proleptic
  * Gregorian calendar.  The default implementation in the TimeZone
  * class delegates to the 8-argument getOffset().
  *
  * @param zone, the vzone to use
  * @param date moment in time for which to return offsets, in
  * units of milliseconds from January 1, 1970 0:00 GMT, either GMT
  * time or local wall time, depending on `local'.
  * @param local if true, `date' is local wall time; otherwise it
  * is in GMT time.
  * @param rawOffset output parameter to receive the raw offset, that
  * is, the offset not including DST adjustments
  * @param dstOffset output parameter to receive the DST offset,
  * that is, the offset to be added to `rawOffset' to obtain the
  * total offset between local and GMT time. If DST is not in
  * effect, this value is zero; otherwise it is a positive value,
  * typically one hour.
  * @param ec input-output error code
  */
 U_CAPI void U_EXPORT2
 vzone_getOffset3(VZone* zone, UDate date, UBool local, int32_t& rawOffset,
                 int32_t& dstOffset, UErrorCode& ec);

 /**
  * Sets the TimeZone's raw GMT offset (i.e., the number of milliseconds to add
  * to GMT to get local time, before taking daylight savings time into account).
  *
  * @param zone, the vzone to use
  * @param offsetMillis  The new raw GMT offset for this time zone.
  */
 U_CAPI void U_EXPORT2
 vzone_setRawOffset(VZone* zone, int32_t offsetMillis);

 /**
  * Returns the TimeZone's raw GMT offset (i.e., the number of milliseconds to add
  * to GMT to get local time, before taking daylight savings time into account).
  *
  * @param zone, the vzone to use
  * @return   The TimeZone's raw GMT offset.
  */
 U_CAPI int32_t U_EXPORT2
 vzone_getRawOffset(VZone* zone);

 /**
  * Queries if this time zone uses daylight savings time.
  * @param zone, the vzone to use
  * @return true if this time zone uses daylight savings time,
  * false, otherwise.
  */
 U_CAPI UBool U_EXPORT2
 vzone_useDaylightTime(VZone* zone);

 /**
  * Queries if the given date is in daylight savings time in
  * this time zone.
  * This method is wasteful since it creates a new GregorianCalendar and
  * deletes it each time it is called. This is a deprecated method
  * and provided only for Java compatibility.
  *
  * @param zone, the vzone to use
  * @param date the given UDate.
  * @param status Output param filled in with success/error code.
  * @return true if the given date is in daylight savings time,
  * false, otherwise.
  */
 U_INTERNAL UBool U_EXPORT2
 vzone_inDaylightTime(VZone* zone, UDate date, UErrorCode& status);

 /**
  * Returns true if this zone has the same rule and offset as another zone.
  * That is, if this zone differs only in ID, if at all.
  * @param zone, the vzone to use
  * @param other the <code>TimeZone</code> object to be compared with
  * @return true if the given zone is the same as this one,
  * with the possible exception of the ID
  */
 U_CAPI UBool U_EXPORT2
 vzone_hasSameRules(VZone* zone, const VZone* other);

 /**
  * Gets the first time zone transition after the base time.
  * @param zone, the vzone to use
  * @param base      The base time.
  * @param inclusive Whether the base time is inclusive or not.
  * @param result    Receives the first transition after the base time.
  * @return  TRUE if the transition is found.
  */
 U_CAPI UBool U_EXPORT2
 vzone_getNextTransition(VZone* zone, UDate base, UBool inclusive, ZTrans* result);

 /**
  * Gets the most recent time zone transition before the base time.
  * @param zone, the vzone to use
  * @param base      The base time.
  * @param inclusive Whether the base time is inclusive or not.
  * @param result    Receives the most recent transition before the base time.
  * @return  TRUE if the transition is found.
  */
 U_CAPI UBool U_EXPORT2
 vzone_getPreviousTransition(VZone* zone, UDate base, UBool inclusive, ZTrans* result);

 /**
  * Returns the number of <code>TimeZoneRule</code>s which represents time transitions,
  * for this time zone, that is, all <code>TimeZoneRule</code>s for this time zone except
  * <code>InitialTimeZoneRule</code>.  The return value range is 0 or any positive value.
  * @param zone, the vzone to use
  * @param status    Receives error status code.
  * @return The number of <code>TimeZoneRule</code>s representing time transitions.
  */
 U_CAPI int32_t U_EXPORT2
 vzone_countTransitionRules(VZone* zone, UErrorCode& status);

 /**
  * 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 zone, the vzone to use
  * @return          The class ID for all objects of this class.
  */
 U_CAPI UClassID U_EXPORT2
 vzone_getStaticClassID(VZone* zone);

 /**
  * 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 zone, the vzone 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
 vzone_getDynamicClassID(VZone* zone);

 #endif // __VZONE_H

 #endif
	/*
	*******************************************************************************
	* Copyright (C) 2009-2011, International Business Machines Corporation and
	* others. All Rights Reserved.
	*******************************************************************************
	*/

	/**
	* \file
	* \brief C API: RFC2445 VTIMEZONE support
	*
	* <p>This is a C wrapper around the C++ VTimeZone class.</p>
	*/

	#ifndef __VZONE_H
	#define __VZONE_H

	#include "unicode/utypes.h"

	#if !UCONFIG_NO_FORMATTING

	#include "ztrans.h"

	#ifndef UCNV_H
	struct VZone;
	/**
	* A UnicodeSet. Use the vzone_* API to manipulate. Create with
	* vzone_open*, and destroy with vzone_close.
	*/
	typedef struct VZone VZone;
	#endif

	/*********************************************************************
	* VZone API
	*********************************************************************/

	/**
	* Creates a vzone from the given time zone ID.
	* @param ID The time zone ID, such as America/New_York
	* @param idLength, length of the ID parameter
	* @return A vzone object initialized by the time zone ID,
	* or NULL when the ID is unknown.
	*/
	U_CAPI VZone* U_EXPORT2
	vzone_openID(const UChar* ID, int32_t idLength);

	/**
	* Create a vzone instance by RFC2445 VTIMEZONE data
	* @param vtzdata The string including VTIMEZONE data block
	* @param vtzdataLength, length of the vtzdata
	* @param status Output param to filled in with a success or an error.
	* @return A vzone initialized by the VTIMEZONE data or
	* NULL if failed to load the rule from the VTIMEZONE data.
	*/
	U_CAPI VZone* U_EXPORT2
	vzone_openData(const UChar* vtzdata, int32_t vtzdataLength, UErrorCode& status);

	/**
	* Disposes of the storage used by a VZone object. This function should
	* be called exactly once for objects returned by vzone_open*.
	* @param set the object to dispose of
	*/
	U_CAPI void U_EXPORT2
	vzone_close(VZone* zone);

	/**
	* Returns a copy of this object.
	* @param zone the original vzone
	* @return the newly allocated copy of the vzone
	*/
	U_CAPI VZone* U_EXPORT2
	vzone_clone(const VZone *zone);

	/**
	* Returns true if zone1 is identical to zone2
	* and vis versa.
	* @param zone1 to be checked for containment
	* @param zone2 to be checked for containment
	* @return true if the test condition is met
	*/
	U_CAPI UBool U_EXPORT2
	vzone_equals(const VZone* zone1, const VZone* zone2);

	/**
	* Gets the RFC2445 TZURL property value. When a vzone instance was
	* created from VTIMEZONE data, the initial value is set by the TZURL
	* property value in the data. Otherwise, the initial value is not set.
	* @param zone, the vzone to use
	* @param url Receives the RFC2445 TZURL property value.
	* @param urlLength, length of the url
	* @return TRUE if TZURL attribute is available and value is set.
	*/
	U_CAPI UBool U_EXPORT2
	vzone_getTZURL(VZone* zone, UChar* & url, int32_t & urlLength);

	/**
	* Sets the RFC2445 TZURL property value.
	* @param zone, the vzone to use
	* @param url The TZURL property value.
	* @param urlLength, length of the url
	*/
	U_CAPI void U_EXPORT2
	vzone_setTZURL(VZone* zone, UChar* url, int32_t urlLength);

	/**
	* Gets the RFC2445 LAST-MODIFIED property value. When a vzone instance
	* was created from VTIMEZONE data, the initial value is set by the
	* LAST-MODIFIED property value in the data. Otherwise, the initial value
	* is not set.
	* @param zone, the vzone to use
	* @param lastModified Receives the last modified date.
	* @return TRUE if lastModified attribute is available and value is set.
	*/
	U_CAPI UBool U_EXPORT2
	vzone_getLastModified(VZone* zone, UDate& lastModified);

	/**
	* Sets the RFC2445 LAST-MODIFIED property value.
	* @param zone, the vzone to use
	* @param lastModified The LAST-MODIFIED date.
	*/
	U_CAPI void U_EXPORT2
	vzone_setLastModified(VZone* zone, UDate lastModified);

	/**
	* Writes RFC2445 VTIMEZONE data for this time zone
	* @param zone, the vzone to use
	* @param result Output param to filled in with the VTIMEZONE data.
	* @param resultLength, length of the result output
	* @param status Output param to filled in with a success or an error.
	*/
	U_CAPI void U_EXPORT2
	vzone_write(VZone* zone, UChar* & result, int32_t & resultLength, UErrorCode& status);

	/**
	* Writes RFC2445 VTIMEZONE data for this time zone applicalbe
	* for dates after the specified start time.
	* @param zone, the vzone to use
	* @param start The start date.
	* @param result Output param to filled in with the VTIMEZONE data.
	* @param resultLength, length of the result output
	* @param status Output param to filled in with a success or an error.
	*/
	U_CAPI void U_EXPORT2
	vzone_writeFromStart(VZone* zone, UDate start, UChar* & result, int32_t & resultLength, UErrorCode& status);

	/**
	* Writes RFC2445 VTIMEZONE data applicalbe for the specified date.
	* Some common iCalendar implementations can only handle a single time
	* zone property or a pair of standard and daylight time properties using
	* BYDAY rule with day of week (such as BYDAY=1SUN). This method produce
	* the VTIMEZONE data which can be handled these implementations. The rules
	* produced by this method can be used only for calculating time zone offset
	* around the specified date.
	* @param zone, the vzone to use
	* @param time The date used for rule extraction.
	* @param result Output param to filled in with the VTIMEZONE data.
	* @param status Output param to filled in with a success or an error.
	*/
	U_CAPI void U_EXPORT2
	vzone_writeSimple(VZone* zone, UDate time, UChar* & result, int32_t & resultLength, UErrorCode& status);

	/**
	* Returns the TimeZone's adjusted GMT offset (i.e., the number of milliseconds to add
	* to GMT to get local time in this time zone, taking daylight savings time into
	* account) as of a particular reference date. The reference date is used to determine
	* whether daylight savings time is in effect and needs to be figured into the offset
	* that is returned (in other words, what is the adjusted GMT offset in this time zone
	* at this particular date and time?). For the time zones produced by createTimeZone(),
	* the reference data is specified according to the Gregorian calendar, and the date
	* and time fields are local standard time.
	*
	* <p>Note: Don't call this method. Instead, call the getOffset(UDate...) overload,
	* which returns both the raw and the DST offset for a given time. This method
	* is retained only for backward compatibility.
	*
	* @param zone, the vzone to use
	* @param era The reference date's era
	* @param year The reference date's year
	* @param month The reference date's month (0-based; 0 is January)
	* @param day The reference date's day-in-month (1-based)
	* @param dayOfWeek The reference date's day-of-week (1-based; 1 is Sunday)
	* @param millis The reference date's milliseconds in day, local standard time
	* @param status Output param to filled in with a success or an error.
	* @return The offset in milliseconds to add to GMT to get local time.
	*/
	U_CAPI int32_t U_EXPORT2
	vzone_getOffset(VZone* zone, uint8_t era, int32_t year, int32_t month, int32_t day,
	uint8_t dayOfWeek, int32_t millis, UErrorCode& status);

	/**
	* Gets the time zone offset, for current date, modified in case of
	* daylight savings. This is the offset to add to UTC to get local time.
	*
	* <p>Note: Don't call this method. Instead, call the getOffset(UDate...) overload,
	* which returns both the raw and the DST offset for a given time. This method
	* is retained only for backward compatibility.
	*
	* @param zone, the vzone to use
	* @param era The reference date's era
	* @param year The reference date's year
	* @param month The reference date's month (0-based; 0 is January)
	* @param day The reference date's day-in-month (1-based)
	* @param dayOfWeek The reference date's day-of-week (1-based; 1 is Sunday)
	* @param millis The reference date's milliseconds in day, local standard time
	* @param monthLength The length of the given month in days.
	* @param status Output param to filled in with a success or an error.
	* @return The offset in milliseconds to add to GMT to get local time.
	*/
	U_CAPI int32_t U_EXPORT2
	vzone_getOffset2(VZone* zone, uint8_t era, int32_t year, int32_t month, int32_t day,
	uint8_t dayOfWeek, int32_t millis,
	int32_t monthLength, UErrorCode& status);

	/**
	* Returns the time zone raw and GMT offset for the given moment
	* in time. Upon return, local-millis = GMT-millis + rawOffset +
	* dstOffset. All computations are performed in the proleptic
	* Gregorian calendar. The default implementation in the TimeZone
	* class delegates to the 8-argument getOffset().
	*
	* @param zone, the vzone to use
	* @param date moment in time for which to return offsets, in
	* units of milliseconds from January 1, 1970 0:00 GMT, either GMT
	* time or local wall time, depending on `local'.
	* @param local if true, `date' is local wall time; otherwise it
	* is in GMT time.
	* @param rawOffset output parameter to receive the raw offset, that
	* is, the offset not including DST adjustments
	* @param dstOffset output parameter to receive the DST offset,
	* that is, the offset to be added to `rawOffset' to obtain the
	* total offset between local and GMT time. If DST is not in
	* effect, this value is zero; otherwise it is a positive value,
	* typically one hour.
	* @param ec input-output error code
	*/
	U_CAPI void U_EXPORT2
	vzone_getOffset3(VZone* zone, UDate date, UBool local, int32_t& rawOffset,
	int32_t& dstOffset, UErrorCode& ec);

	/**
	* Sets the TimeZone's raw GMT offset (i.e., the number of milliseconds to add
	* to GMT to get local time, before taking daylight savings time into account).
	*
	* @param zone, the vzone to use
	* @param offsetMillis The new raw GMT offset for this time zone.
	*/
	U_CAPI void U_EXPORT2
	vzone_setRawOffset(VZone* zone, int32_t offsetMillis);

	/**
	* Returns the TimeZone's raw GMT offset (i.e., the number of milliseconds to add
	* to GMT to get local time, before taking daylight savings time into account).
	*
	* @param zone, the vzone to use
	* @return The TimeZone's raw GMT offset.
	*/
	U_CAPI int32_t U_EXPORT2
	vzone_getRawOffset(VZone* zone);

	/**
	* Queries if this time zone uses daylight savings time.
	* @param zone, the vzone to use
	* @return true if this time zone uses daylight savings time,
	* false, otherwise.
	*/
	U_CAPI UBool U_EXPORT2
	vzone_useDaylightTime(VZone* zone);

	/**
	* Queries if the given date is in daylight savings time in
	* this time zone.
	* This method is wasteful since it creates a new GregorianCalendar and
	* deletes it each time it is called. This is a deprecated method
	* and provided only for Java compatibility.
	*
	* @param zone, the vzone to use
	* @param date the given UDate.
	* @param status Output param filled in with success/error code.
	* @return true if the given date is in daylight savings time,
	* false, otherwise.
	*/
	U_INTERNAL UBool U_EXPORT2
	vzone_inDaylightTime(VZone* zone, UDate date, UErrorCode& status);

	/**
	* Returns true if this zone has the same rule and offset as another zone.
	* That is, if this zone differs only in ID, if at all.
	* @param zone, the vzone to use
	* @param other the <code>TimeZone</code> object to be compared with
	* @return true if the given zone is the same as this one,
	* with the possible exception of the ID
	*/
	U_CAPI UBool U_EXPORT2
	vzone_hasSameRules(VZone* zone, const VZone* other);

	/**
	* Gets the first time zone transition after the base time.
	* @param zone, the vzone to use
	* @param base The base time.
	* @param inclusive Whether the base time is inclusive or not.
	* @param result Receives the first transition after the base time.
	* @return TRUE if the transition is found.
	*/
	U_CAPI UBool U_EXPORT2
	vzone_getNextTransition(VZone* zone, UDate base, UBool inclusive, ZTrans* result);

	/**
	* Gets the most recent time zone transition before the base time.
	* @param zone, the vzone to use
	* @param base The base time.
	* @param inclusive Whether the base time is inclusive or not.
	* @param result Receives the most recent transition before the base time.
	* @return TRUE if the transition is found.
	*/
	U_CAPI UBool U_EXPORT2
	vzone_getPreviousTransition(VZone* zone, UDate base, UBool inclusive, ZTrans* result);

	/**
	* Returns the number of <code>TimeZoneRule</code>s which represents time transitions,
	* for this time zone, that is, all <code>TimeZoneRule</code>s for this time zone except
	* <code>InitialTimeZoneRule</code>. The return value range is 0 or any positive value.
	* @param zone, the vzone to use
	* @param status Receives error status code.
	* @return The number of <code>TimeZoneRule</code>s representing time transitions.
	*/
	U_CAPI int32_t U_EXPORT2
	vzone_countTransitionRules(VZone* zone, UErrorCode& status);

	/**
	* 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 zone, the vzone to use
	* @return The class ID for all objects of this class.
	*/
	U_CAPI UClassID U_EXPORT2
	vzone_getStaticClassID(VZone* zone);

	/**
	* 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 zone, the vzone 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
	vzone_getDynamicClassID(VZone* zone);

	#endif // __VZONE_H

	#endif