535 lines
17 KiB
C++
535 lines
17 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 2003-2009,2012,2016 International Business Machines Corporation and
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* others. All Rights Reserved.
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*******************************************************************************
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*
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* File JAPANCAL.CPP
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*
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* Modification History:
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* 05/16/2003 srl copied from buddhcal.cpp
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*
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "cmemory.h"
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#include "japancal.h"
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#include "unicode/gregocal.h"
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#include "umutex.h"
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#include "uassert.h"
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//#define U_DEBUG_JCAL
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#ifdef U_DEBUG_JCAL
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#include <stdio.h>
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#endif
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U_NAMESPACE_BEGIN
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(JapaneseCalendar)
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// Gregorian date of each emperor's ascension
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// Years are AD, months are 1-based.
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static const struct {
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int16_t year;
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int8_t month;
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int8_t day;
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} kEraInfo[] = {
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// Year Month Day
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{ 645, 6, 19 }, // Taika 0
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{ 650, 2, 15 }, // Hakuchi 1
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{ 672, 1, 1 }, // Hakuho 2
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{ 686, 7, 20 }, // Shucho 3
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{ 701, 3, 21 }, // Taiho 4
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{ 704, 5, 10 }, // Keiun 5
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{ 708, 1, 11 }, // Wado 6
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{ 715, 9, 2 }, // Reiki 7
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{ 717, 11, 17 }, // Yoro 8
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{ 724, 2, 4 }, // Jinki 9
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{ 729, 8, 5 }, // Tempyo 10
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{ 749, 4, 14 }, // Tempyo-kampo 11
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{ 749, 7, 2 }, // Tempyo-shoho 12
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{ 757, 8, 18 }, // Tempyo-hoji 13
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{ 765, 1, 7 }, // Tempho-jingo 14
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{ 767, 8, 16 }, // Jingo-keiun 15
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{ 770, 10, 1 }, // Hoki 16
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{ 781, 1, 1 }, // Ten-o 17
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{ 782, 8, 19 }, // Enryaku 18
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{ 806, 5, 18 }, // Daido 19
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{ 810, 9, 19 }, // Konin 20
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{ 824, 1, 5 }, // Tencho
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{ 834, 1, 3 }, // Showa
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{ 848, 6, 13 }, // Kajo
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{ 851, 4, 28 }, // Ninju
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{ 854, 11, 30 }, // Saiko
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{ 857, 2, 21 }, // Tennan
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{ 859, 4, 15 }, // Jogan
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{ 877, 4, 16 }, // Genkei
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{ 885, 2, 21 }, // Ninna
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{ 889, 4, 27 }, // Kampyo 30
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{ 898, 4, 26 }, // Shotai
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{ 901, 7, 15 }, // Engi
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{ 923, 4, 11 }, // Encho
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{ 931, 4, 26 }, // Shohei
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{ 938, 5, 22 }, // Tengyo
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{ 947, 4, 22 }, // Tenryaku
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{ 957, 10, 27 }, // Tentoku
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{ 961, 2, 16 }, // Owa
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{ 964, 7, 10 }, // Koho
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{ 968, 8, 13 }, // Anna 40
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{ 970, 3, 25 }, // Tenroku
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{ 973, 12, 20 }, // Ten-en
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{ 976, 7, 13 }, // Jogen
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{ 978, 11, 29 }, // Tengen
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{ 983, 4, 15 }, // Eikan
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{ 985, 4, 27 }, // Kanna
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{ 987, 4, 5 }, // Ei-en
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{ 989, 8, 8 }, // Eiso
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{ 990, 11, 7 }, // Shoryaku
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{ 995, 2, 22 }, // Chotoku 50
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{ 999, 1, 13 }, // Choho
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{ 1004, 7, 20 }, // Kanko
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{ 1012, 12, 25 }, // Chowa
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{ 1017, 4, 23 }, // Kannin
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{ 1021, 2, 2 }, // Jian
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{ 1024, 7, 13 }, // Manju
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{ 1028, 7, 25 }, // Chogen
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{ 1037, 4, 21 }, // Choryaku
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{ 1040, 11, 10 }, // Chokyu
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{ 1044, 11, 24 }, // Kantoku 60
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{ 1046, 4, 14 }, // Eisho
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{ 1053, 1, 11 }, // Tengi
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{ 1058, 8, 29 }, // Kohei
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{ 1065, 8, 2 }, // Jiryaku
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{ 1069, 4, 13 }, // Enkyu
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{ 1074, 8, 23 }, // Shoho
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{ 1077, 11, 17 }, // Shoryaku
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{ 1081, 2, 10 }, // Eiho
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{ 1084, 2, 7 }, // Otoku
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{ 1087, 4, 7 }, // Kanji 70
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{ 1094, 12, 15 }, // Kaho
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{ 1096, 12, 17 }, // Eicho
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{ 1097, 11, 21 }, // Shotoku
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{ 1099, 8, 28 }, // Kowa
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{ 1104, 2, 10 }, // Choji
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{ 1106, 4, 9 }, // Kasho
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{ 1108, 8, 3 }, // Tennin
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{ 1110, 7, 13 }, // Ten-ei
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{ 1113, 7, 13 }, // Eikyu
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{ 1118, 4, 3 }, // Gen-ei 80
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{ 1120, 4, 10 }, // Hoan
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{ 1124, 4, 3 }, // Tenji
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{ 1126, 1, 22 }, // Daiji
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{ 1131, 1, 29 }, // Tensho
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{ 1132, 8, 11 }, // Chosho
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{ 1135, 4, 27 }, // Hoen
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{ 1141, 7, 10 }, // Eiji
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{ 1142, 4, 28 }, // Koji
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{ 1144, 2, 23 }, // Tenyo
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{ 1145, 7, 22 }, // Kyuan 90
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{ 1151, 1, 26 }, // Ninpei
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{ 1154, 10, 28 }, // Kyuju
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{ 1156, 4, 27 }, // Hogen
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{ 1159, 4, 20 }, // Heiji
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{ 1160, 1, 10 }, // Eiryaku
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{ 1161, 9, 4 }, // Oho
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{ 1163, 3, 29 }, // Chokan
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{ 1165, 6, 5 }, // Eiman
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{ 1166, 8, 27 }, // Nin-an
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{ 1169, 4, 8 }, // Kao 100
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{ 1171, 4, 21 }, // Shoan
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{ 1175, 7, 28 }, // Angen
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{ 1177, 8, 4 }, // Jisho
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{ 1181, 7, 14 }, // Yowa
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{ 1182, 5, 27 }, // Juei
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{ 1184, 4, 16 }, // Genryuku
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{ 1185, 8, 14 }, // Bunji
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{ 1190, 4, 11 }, // Kenkyu
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{ 1199, 4, 27 }, // Shoji
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{ 1201, 2, 13 }, // Kennin 110
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{ 1204, 2, 20 }, // Genkyu
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{ 1206, 4, 27 }, // Ken-ei
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{ 1207, 10, 25 }, // Shogen
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{ 1211, 3, 9 }, // Kenryaku
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{ 1213, 12, 6 }, // Kenpo
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{ 1219, 4, 12 }, // Shokyu
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{ 1222, 4, 13 }, // Joo
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{ 1224, 11, 20 }, // Gennin
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{ 1225, 4, 20 }, // Karoku
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{ 1227, 12, 10 }, // Antei 120
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{ 1229, 3, 5 }, // Kanki
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{ 1232, 4, 2 }, // Joei
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{ 1233, 4, 15 }, // Tempuku
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{ 1234, 11, 5 }, // Bunryaku
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{ 1235, 9, 19 }, // Katei
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{ 1238, 11, 23 }, // Ryakunin
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{ 1239, 2, 7 }, // En-o
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{ 1240, 7, 16 }, // Ninji
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{ 1243, 2, 26 }, // Kangen
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{ 1247, 2, 28 }, // Hoji 130
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{ 1249, 3, 18 }, // Kencho
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{ 1256, 10, 5 }, // Kogen
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{ 1257, 3, 14 }, // Shoka
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{ 1259, 3, 26 }, // Shogen
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{ 1260, 4, 13 }, // Bun-o
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{ 1261, 2, 20 }, // Kocho
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{ 1264, 2, 28 }, // Bun-ei
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{ 1275, 4, 25 }, // Kenji
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{ 1278, 2, 29 }, // Koan
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{ 1288, 4, 28 }, // Shoo 140
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{ 1293, 8, 55 }, // Einin
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{ 1299, 4, 25 }, // Shoan
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{ 1302, 11, 21 }, // Kengen
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{ 1303, 8, 5 }, // Kagen
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{ 1306, 12, 14 }, // Tokuji
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{ 1308, 10, 9 }, // Enkei
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{ 1311, 4, 28 }, // Ocho
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{ 1312, 3, 20 }, // Showa
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{ 1317, 2, 3 }, // Bunpo
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{ 1319, 4, 28 }, // Geno 150
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{ 1321, 2, 23 }, // Genkyo
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{ 1324, 12, 9 }, // Shochu
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{ 1326, 4, 26 }, // Kareki
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{ 1329, 8, 29 }, // Gentoku
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{ 1331, 8, 9 }, // Genko
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{ 1334, 1, 29 }, // Kemmu
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{ 1336, 2, 29 }, // Engen
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{ 1340, 4, 28 }, // Kokoku
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{ 1346, 12, 8 }, // Shohei
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{ 1370, 7, 24 }, // Kentoku 160
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{ 1372, 4, 1 }, // Bunch\u0169
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{ 1375, 5, 27 }, // Tenju
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{ 1379, 3, 22 }, // Koryaku
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{ 1381, 2, 10 }, // Kowa
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{ 1384, 4, 28 }, // Gench\u0169
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{ 1384, 2, 27 }, // Meitoku
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{ 1387, 8, 23 }, // Kakei
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{ 1389, 2, 9 }, // Koo
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{ 1390, 3, 26 }, // Meitoku
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{ 1394, 7, 5 }, // Oei 170
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{ 1428, 4, 27 }, // Shocho
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{ 1429, 9, 5 }, // Eikyo
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{ 1441, 2, 17 }, // Kakitsu
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{ 1444, 2, 5 }, // Bun-an
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{ 1449, 7, 28 }, // Hotoku
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{ 1452, 7, 25 }, // Kyotoku
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{ 1455, 7, 25 }, // Kosho
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{ 1457, 9, 28 }, // Choroku
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{ 1460, 12, 21 }, // Kansho
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{ 1466, 2, 28 }, // Bunsho 180
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{ 1467, 3, 3 }, // Onin
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{ 1469, 4, 28 }, // Bunmei
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{ 1487, 7, 29 }, // Chokyo
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{ 1489, 8, 21 }, // Entoku
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{ 1492, 7, 19 }, // Meio
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{ 1501, 2, 29 }, // Bunki
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{ 1504, 2, 30 }, // Eisho
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{ 1521, 8, 23 }, // Taiei
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{ 1528, 8, 20 }, // Kyoroku
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{ 1532, 7, 29 }, // Tenmon 190
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{ 1555, 10, 23 }, // Koji
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{ 1558, 2, 28 }, // Eiroku
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{ 1570, 4, 23 }, // Genki
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{ 1573, 7, 28 }, // Tensho
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{ 1592, 12, 8 }, // Bunroku
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{ 1596, 10, 27 }, // Keicho
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{ 1615, 7, 13 }, // Genwa
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{ 1624, 2, 30 }, // Kan-ei
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{ 1644, 12, 16 }, // Shoho
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{ 1648, 2, 15 }, // Keian 200
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{ 1652, 9, 18 }, // Shoo
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{ 1655, 4, 13 }, // Meiryaku
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{ 1658, 7, 23 }, // Manji
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{ 1661, 4, 25 }, // Kanbun
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{ 1673, 9, 21 }, // Enpo
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{ 1681, 9, 29 }, // Tenwa
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{ 1684, 2, 21 }, // Jokyo
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{ 1688, 9, 30 }, // Genroku
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{ 1704, 3, 13 }, // Hoei
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{ 1711, 4, 25 }, // Shotoku 210
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{ 1716, 6, 22 }, // Kyoho
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{ 1736, 4, 28 }, // Genbun
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{ 1741, 2, 27 }, // Kanpo
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{ 1744, 2, 21 }, // Enkyo
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{ 1748, 7, 12 }, // Kan-en
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{ 1751, 10, 27 }, // Horyaku
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{ 1764, 6, 2 }, // Meiwa
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{ 1772, 11, 16 }, // An-ei
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{ 1781, 4, 2 }, // Tenmei
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{ 1789, 1, 25 }, // Kansei 220
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{ 1801, 2, 5 }, // Kyowa
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{ 1804, 2, 11 }, // Bunka
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{ 1818, 4, 22 }, // Bunsei
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{ 1830, 12, 10 }, // Tenpo
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{ 1844, 12, 2 }, // Koka
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{ 1848, 2, 28 }, // Kaei
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{ 1854, 11, 27 }, // Ansei
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{ 1860, 3, 18 }, // Man-en
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{ 1861, 2, 19 }, // Bunkyu
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{ 1864, 2, 20 }, // Genji 230
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{ 1865, 4, 7 }, // Keio 231
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{ 1868, 9, 8 }, // Meiji 232
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{ 1912, 7, 30 }, // Taisho 233
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{ 1926, 12, 25 }, // Showa 234
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{ 1989, 1, 8 } // Heisei 235
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};
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#define kEraCount UPRV_LENGTHOF(kEraInfo)
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/**
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* The current era, for reference.
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*/
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static const int32_t kCurrentEra = (kEraCount-1); // int32_t to match the calendar field type
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static const int32_t kGregorianEpoch = 1970; // used as the default value of EXTENDED_YEAR
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/* Some platforms don't like to export constants, like old Palm OS and some z/OS configurations. */
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uint32_t JapaneseCalendar::getCurrentEra() {
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return kCurrentEra;
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}
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JapaneseCalendar::JapaneseCalendar(const Locale& aLocale, UErrorCode& success)
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: GregorianCalendar(aLocale, success)
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{
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setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
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}
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JapaneseCalendar::~JapaneseCalendar()
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{
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}
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JapaneseCalendar::JapaneseCalendar(const JapaneseCalendar& source)
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: GregorianCalendar(source)
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{
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}
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JapaneseCalendar& JapaneseCalendar::operator= ( const JapaneseCalendar& right)
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{
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GregorianCalendar::operator=(right);
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return *this;
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}
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Calendar* JapaneseCalendar::clone(void) const
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{
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return new JapaneseCalendar(*this);
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}
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const char *JapaneseCalendar::getType() const
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{
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return "japanese";
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}
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int32_t JapaneseCalendar::getDefaultMonthInYear(int32_t eyear)
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{
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int32_t era = internalGetEra();
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// TODO do we assume we can trust 'era'? What if it is denormalized?
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int32_t month = 0;
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// Find out if we are at the edge of an era
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if(eyear == kEraInfo[era].year) {
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// Yes, we're in the first year of this era.
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return kEraInfo[era].month-1;
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}
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return month;
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}
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int32_t JapaneseCalendar::getDefaultDayInMonth(int32_t eyear, int32_t month)
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{
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int32_t era = internalGetEra();
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int32_t day = 1;
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if(eyear == kEraInfo[era].year) {
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if(month == (kEraInfo[era].month-1)) {
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return kEraInfo[era].day;
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}
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}
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return day;
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}
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int32_t JapaneseCalendar::internalGetEra() const
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{
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return internalGet(UCAL_ERA, kCurrentEra);
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}
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int32_t JapaneseCalendar::handleGetExtendedYear()
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{
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// EXTENDED_YEAR in JapaneseCalendar is a Gregorian year
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// The default value of EXTENDED_YEAR is 1970 (Showa 45)
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int32_t year;
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if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR &&
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newerField(UCAL_EXTENDED_YEAR, UCAL_ERA) == UCAL_EXTENDED_YEAR) {
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year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
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} else {
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// Subtract one because year starts at 1
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year = internalGet(UCAL_YEAR) + kEraInfo[internalGetEra()].year - 1;
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}
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return year;
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}
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void JapaneseCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status)
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{
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//Calendar::timeToFields(theTime, quick, status);
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GregorianCalendar::handleComputeFields(julianDay, status);
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int32_t year = internalGet(UCAL_EXTENDED_YEAR); // Gregorian year
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int32_t low = 0;
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// Short circuit for recent years. Most modern computations will
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// occur in the current era and won't require the binary search.
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// Note that if the year is == the current era year, then we use
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// the binary search to handle the month/dom comparison.
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, "== %d \n", year);
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#endif
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if (year > kEraInfo[kCurrentEra].year) {
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low = kCurrentEra;
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, " low=%d (special)\n", low);
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#endif
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} else {
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// Binary search
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int32_t high = kEraCount;
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, " high=%d\n", high);
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#endif
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while (low < high - 1) {
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int32_t i = (low + high) / 2;
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int32_t diff = year - kEraInfo[i].year;
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, " d=%d low=%d, high=%d. Considering %d:M%d D%d Y%d. { we are ?:M%d D%d Y%d }\n",
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diff,low, high, i, kEraInfo[i].month-1, kEraInfo[i].day, kEraInfo[i].year, internalGet(UCAL_MONTH), internalGet(UCAL_DATE),year);
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#endif
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// If years are the same, then compare the months, and if those
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// are the same, compare days of month. In the ERAS array
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// months are 1-based for easier maintenance.
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if (diff == 0) {
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diff = internalGet(UCAL_MONTH) - (kEraInfo[i].month - 1);
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, "diff now %d (M) = %d - %d - 1\n", diff, internalGet(UCAL_MONTH), kEraInfo[i].month);
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#endif
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if (diff == 0) {
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diff = internalGet(UCAL_DATE) - kEraInfo[i].day;
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, "diff now %d (D)\n", diff);
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#endif
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}
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}
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if (diff >= 0) {
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low = i;
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} else {
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high = i;
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}
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, ". low=%d, high=%d, i=%d, diff=%d.. %d\n", low, high, i, diff, year);
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#endif
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}
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}
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, " low[era]=%d,.. %d\n", low, year);
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#endif
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// Now we've found the last era that starts before this date, so
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// adjust the year to count from the start of that era. Note that
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// all dates before the first era will fall into the first era by
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// the algorithm.
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internalSet(UCAL_ERA, low);
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internalSet(UCAL_YEAR, year - kEraInfo[low].year + 1);
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#ifdef U_DEBUG_JCAL
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fprintf(stderr, " Set ERA=%d, year=%d\n", low, year-kEraInfo[low].year+1);
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#endif
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}
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/*
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Disable pivoting
|
|
*/
|
|
UBool JapaneseCalendar::haveDefaultCentury() const
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
UDate JapaneseCalendar::defaultCenturyStart() const
|
|
{
|
|
return 0;// WRONG
|
|
}
|
|
|
|
int32_t JapaneseCalendar::defaultCenturyStartYear() const
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int32_t JapaneseCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
|
|
{
|
|
switch(field) {
|
|
case UCAL_ERA:
|
|
if (limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) {
|
|
return 0;
|
|
}
|
|
return kCurrentEra;
|
|
case UCAL_YEAR:
|
|
{
|
|
switch (limitType) {
|
|
case UCAL_LIMIT_MINIMUM:
|
|
case UCAL_LIMIT_GREATEST_MINIMUM:
|
|
return 1;
|
|
case UCAL_LIMIT_LEAST_MAXIMUM:
|
|
return 1;
|
|
case UCAL_LIMIT_COUNT: //added to avoid warning
|
|
case UCAL_LIMIT_MAXIMUM:
|
|
return GregorianCalendar::handleGetLimit(UCAL_YEAR, UCAL_LIMIT_MAXIMUM) - kEraInfo[kCurrentEra].year;
|
|
default:
|
|
return 1; // Error condition, invalid limitType
|
|
}
|
|
}
|
|
default:
|
|
return GregorianCalendar::handleGetLimit(field,limitType);
|
|
}
|
|
}
|
|
|
|
int32_t JapaneseCalendar::getActualMaximum(UCalendarDateFields field, UErrorCode& status) const {
|
|
if (field == UCAL_YEAR) {
|
|
int32_t era = get(UCAL_ERA, status);
|
|
if (U_FAILURE(status)) {
|
|
return 0; // error case... any value
|
|
}
|
|
if (era == kCurrentEra) {
|
|
// TODO: Investigate what value should be used here - revisit after 4.0.
|
|
return handleGetLimit(UCAL_YEAR, UCAL_LIMIT_MAXIMUM);
|
|
} else {
|
|
int32_t nextEraYear = kEraInfo[era + 1].year;
|
|
int32_t nextEraMonth = kEraInfo[era + 1].month;
|
|
int32_t nextEraDate = kEraInfo[era + 1].day;
|
|
|
|
int32_t maxYear = nextEraYear - kEraInfo[era].year + 1; // 1-base
|
|
if (nextEraMonth == 1 && nextEraDate == 1) {
|
|
// Subtract 1, because the next era starts at Jan 1
|
|
maxYear--;
|
|
}
|
|
return maxYear;
|
|
}
|
|
}
|
|
return GregorianCalendar::getActualMaximum(field, status);
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif
|