// © 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 __ZRULE_H #define __ZRULE_H /** * \file * \brief C API: Time zone rule classes */ #include "unicode/utypes.h" #if !UCONFIG_NO_FORMATTING #include "unicode/uobject.h" /** * A TimeZoneRule. Use the zrule_* API to manipulate. Create with * zrule_open*, and destroy with zrule_close. */ struct ZRule; ZRule; /** * An InitialTimeZoneRule. Use the izrule_* API to manipulate. Create with * izrule_open*, and destroy with izrule_close. */ struct IZRule; IZRule; /** * An AnnualTimeZoneRule. Use the azrule_* API to manipulate. Create with * azrule_open*, and destroy with azrule_close. */ struct AZRule; AZRule; /********************************************************************* * ZRule API *********************************************************************/ /** * Disposes of the storage used by a ZRule object. This function should * be called exactly once for objects returned by zrule_open*. * @param set the object to dispose of */ U_CAPI void U_EXPORT2 zrule_close(ZRule* rule); /** * Returns true if rule1 is identical to rule2 * and vis versa. * @param rule1 to be checked for containment * @param rule2 to be checked for containment * @return true if the test condition is met */ U_CAPI UBool U_EXPORT2 zrule_equals(const ZRule* rule1, const ZRule* rule2); /** * Fills in "name" with the name of this time zone. * @param rule, the Zrule to use * @param name Receives the name of this time zone. * @param nameLength, length of the returned name */ U_CAPI void U_EXPORT2 zrule_getName(ZRule* rule, UChar* name, int32_t nameLength); /** * Gets the standard time offset. * @param rule, the Zrule to use * @return The standard time offset from UTC in milliseconds. */ U_CAPI int32_t U_EXPORT2 zrule_getRawOffset(ZRule* rule); /** * Gets the amount of daylight saving delta time from the standard time. * @param rule, the Zrule to use * @return The amount of daylight saving offset used by this rule * in milliseconds. */ U_CAPI int32_t U_EXPORT2 zrule_getDSTSavings(ZRule* rule); /** * Returns if this rule represents the same rule and offsets as another. * When two ZRule objects differ only its names, this method * returns true. * @param rule1 to be checked for containment * @param rule2 to be checked for containment * @return true if the other <code>TimeZoneRule</code> is the same as this one. */ U_CAPI UBool U_EXPORT2 zrule_isEquivalentTo(ZRule* rule1, ZRule* rule2); /********************************************************************* * IZRule API *********************************************************************/ /** * Constructs an IZRule with the name, the GMT offset of its * standard time and the amount of daylight saving offset adjustment. * @param name The time zone name. * @param nameLength The length of the time zone name. * @param rawOffset The UTC offset of its standard time in milliseconds. * @param dstSavings The amount of daylight saving offset adjustment in milliseconds. * If this ia a rule for standard time, the value of this argument is 0. */ U_CAPI IZRule* U_EXPORT2 izrule_open(const UChar* name, int32_t nameLength, int32_t rawOffset, int32_t dstSavings); /** * Disposes of the storage used by a IZRule object. This function should * be called exactly once for objects returned by izrule_open*. * @param set the object to dispose of */ U_CAPI void U_EXPORT2 izrule_close(IZRule* rule); /** * Returns a copy of this object. * @param rule the original IZRule * @return the newly allocated copy of the IZRule */ U_CAPI IZRule* U_EXPORT2 izrule_clone(IZRule *rule); /** * Returns true if rule1 is identical to rule2 * and vis versa. * @param rule1 to be checked for containment * @param rule2 to be checked for containment * @return true if the test condition is met */ U_CAPI UBool U_EXPORT2 izrule_equals(const IZRule* rule1, const IZRule* rule2); /** * Fills in "name" with the name of this time zone. * @param rule, the IZrule to use * @param name Receives the name of this time zone. * @param nameLength, length of the returned name */ U_CAPI void U_EXPORT2 izrule_getName(IZRule* rule, UChar* & name, int32_t & nameLength); /** * Gets the standard time offset. * @param rule, the IZrule to use * @return The standard time offset from UTC in milliseconds. */ U_CAPI int32_t U_EXPORT2 izrule_getRawOffset(IZRule* rule); /** * Gets the amount of daylight saving delta time from the standard time. * @param rule, the IZrule to use * @return The amount of daylight saving offset used by this rule * in milliseconds. */ U_CAPI int32_t U_EXPORT2 izrule_getDSTSavings(IZRule* rule); /** * Returns if this rule represents the same rule and offsets as another. * When two IZRule objects differ only its names, this method * returns true. * @param rule1 to be checked for containment * @param rule2 to be checked for containment * @return true if the other <code>TimeZoneRule</code> is the same as this one. */ U_CAPI UBool U_EXPORT2 izrule_isEquivalentTo(IZRule* rule1, IZRule* rule2); /** * Gets the very first time when this rule takes effect. * @param rule The IZrule to use * @param prevRawOffset The standard time offset from UTC before this rule * takes effect in milliseconds. * @param prevDSTSavings The amount of daylight saving offset from the * standard time. * @param result Receives the very first time when this rule takes effect. * @return true if the start time is available. When false is returned, output parameter * "result" is unchanged. */ U_CAPI UBool U_EXPORT2 izrule_getFirstStart(IZRule* rule, int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result); /** * Gets the final time when this rule takes effect. * @param rule The IZrule to use * @param prevRawOffset The standard time offset from UTC before this rule * takes effect in milliseconds. * @param prevDSTSavings The amount of daylight saving offset from the * standard time. * @param result Receives the final time when this rule takes effect. * @return true if the start time is available. When false is returned, output parameter * "result" is unchanged. */ U_CAPI UBool U_EXPORT2 izrule_getFinalStart(IZRule* rule, int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result); /** * Gets the first time when this rule takes effect after the specified time. * @param rule The IZrule to use * @param base The first start time after this base time will be returned. * @param prevRawOffset The standard time offset from UTC before this rule * takes effect in milliseconds. * @param prevDSTSavings The amount of daylight saving offset from the * standard time. * @param inclusive Whether the base time is inclusive or not. * @param result Receives The first time when this rule takes effect after * the specified base time. * @return true if the start time is available. When false is returned, output parameter * "result" is unchanged. */ U_CAPI UBool U_EXPORT2 izrule_getNextStart(IZRule* rule, UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, UBool inclusive, UDate& result); /** * Gets the most recent time when this rule takes effect before the specified time. * @param rule The IZrule to use * @param base The most recent time before this base time will be returned. * @param prevRawOffset The standard time offset from UTC before this rule * takes effect in milliseconds. * @param prevDSTSavings The amount of daylight saving offset from the * standard time. * @param inclusive Whether the base time is inclusive or not. * @param result Receives The most recent time when this rule takes effect before * the specified base time. * @return true if the start time is available. When false is returned, output parameter * "result" is unchanged. */ U_CAPI UBool U_EXPORT2 izrule_getPreviousStart(IZRule* rule, UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, UBool inclusive, UDate& result); /** * 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 rule The IZrule to use * @return The class ID for all objects of this class. */ U_CAPI UClassID U_EXPORT2 izrule_getStaticClassID(IZRule* rule); /** * 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 rule The IZrule 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 izrule_getDynamicClassID(IZRule* rule); #endif #endif
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