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Diffstat (limited to 'deps/icu-small/source/i18n/erarules.h')
-rw-r--r-- | deps/icu-small/source/i18n/erarules.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/deps/icu-small/source/i18n/erarules.h b/deps/icu-small/source/i18n/erarules.h new file mode 100644 index 00000000000..4ed86408325 --- /dev/null +++ b/deps/icu-small/source/i18n/erarules.h @@ -0,0 +1,92 @@ +// © 2018 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html + +#ifndef ERARULES_H_ +#define ERARULES_H_ + +#include "unicode/utypes.h" + +#if !UCONFIG_NO_FORMATTING + +#include "unicode/localpointer.h" +#include "unicode/uobject.h" +#include "cmemory.h" + +U_NAMESPACE_BEGIN + +// Export an explicit template instantiation of LocalMemory used as a data member of EraRules. +// When building DLLs for Windows this is required even though no direct access leaks out of the i18n library. +// See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples. +#if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN +// Ignore warning 4661 as LocalPointerBase does not use operator== or operator!= +#pragma warning(suppress: 4661) +template class U_I18N_API LocalPointerBase<int32_t>; +template class U_I18N_API LocalMemory<int32_t>; +#endif + +class U_I18N_API EraRules : public UMemory { +public: + ~EraRules(); + + static EraRules* createInstance(const char *calType, UBool includeTentativeEra, UErrorCode& status); + + /** + * Gets number of effective eras + * @return number of effective eras + */ + inline int32_t getNumberOfEras() const { + return numEras; + } + + /** + * Gets start date of an era + * @param eraIdx Era index + * @param fields Receives date fields. The result includes values of year, month, + * day of month in this order. When an era has no start date, the result + * will be January 1st in year whose value is minimum integer. + * @param status Receives status. + */ + void getStartDate(int32_t eraIdx, int32_t (&fields)[3], UErrorCode& status) const; + + /** + * Gets start year of an era + * @param eraIdx Era index + * @param status Receives status. + * @return The first year of an era. When a era has no start date, minimum int32 + * value is returned. + */ + int32_t getStartYear(int32_t eraIdx, UErrorCode& status) const; + + /** + * Returns era index for the specified year/month/day. + * @param year Year + * @param month Month (1-base) + * @param day Day of month + * @param status Receives status + * @return era index (or 0, when the specified date is before the first era) + */ + int32_t getEraIndex(int32_t year, int32_t month, int32_t day, UErrorCode& status) const; + + /** + * Gets the current era index. This is calculated only once for an instance of + * EraRules. + * + * @return era index of current era (or 0, when current date is before the first era) + */ + inline int32_t getCurrentEraIndex() const { + return currentEra; + } + +private: + EraRules(LocalMemory<int32_t>& eraStartDates, int32_t numEra); + + void initCurrentEra(); + + LocalMemory<int32_t> startDates; + int32_t numEras; + int32_t currentEra; +}; + +U_NAMESPACE_END +#endif /* #if !UCONFIG_NO_FORMATTING */ +#endif /* ERARULES_H_ */ |