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374ca955 | 1 | /* |
46f4442e | 2 | ********************************************************************** |
729e4ab9 | 3 | * Copyright (c) 2003-2008, International Business Machines |
46f4442e A |
4 | * Corporation and others. All Rights Reserved. |
5 | ********************************************************************** | |
6 | * Author: Alan Liu | |
7 | * Created: September 2 2003 | |
8 | * Since: ICU 2.8 | |
9 | ********************************************************************** | |
10 | */ | |
11 | ||
374ca955 A |
12 | #include "gregoimp.h" |
13 | ||
14 | #if !UCONFIG_NO_FORMATTING | |
15 | ||
16 | #include "unicode/ucal.h" | |
17 | #include "uresimp.h" | |
18 | #include "cstring.h" | |
19 | #include "uassert.h" | |
20 | ||
46f4442e A |
21 | #if defined(U_DEBUG_CALDATA) |
22 | #include <stdio.h> | |
23 | #endif | |
24 | ||
25 | U_NAMESPACE_BEGIN | |
26 | ||
729e4ab9 | 27 | int32_t ClockMath::floorDivide(int32_t numerator, int32_t denominator) { |
374ca955 A |
28 | return (numerator >= 0) ? |
29 | numerator / denominator : ((numerator + 1) / denominator) - 1; | |
30 | } | |
31 | ||
729e4ab9 | 32 | int32_t ClockMath::floorDivide(double numerator, int32_t denominator, |
374ca955 A |
33 | int32_t& remainder) { |
34 | double quotient; | |
35 | quotient = uprv_floor(numerator / denominator); | |
36 | remainder = (int32_t) (numerator - (quotient * denominator)); | |
37 | return (int32_t) quotient; | |
38 | } | |
39 | ||
729e4ab9 | 40 | double ClockMath::floorDivide(double dividend, double divisor, |
374ca955 A |
41 | double& remainder) { |
42 | // Only designed to work for positive divisors | |
43 | U_ASSERT(divisor > 0); | |
44 | double quotient = floorDivide(dividend, divisor); | |
45 | remainder = dividend - (quotient * divisor); | |
46 | // N.B. For certain large dividends, on certain platforms, there | |
47 | // is a bug such that the quotient is off by one. If you doubt | |
48 | // this to be true, set a breakpoint below and run cintltst. | |
49 | if (remainder < 0 || remainder >= divisor) { | |
50 | // E.g. 6.7317038241449352e+022 / 86400000.0 is wrong on my | |
51 | // machine (too high by one). 4.1792057231752762e+024 / | |
52 | // 86400000.0 is wrong the other way (too low). | |
53 | double q = quotient; | |
54 | quotient += (remainder < 0) ? -1 : +1; | |
55 | if (q == quotient) { | |
56 | // For quotients > ~2^53, we won't be able to add or | |
57 | // subtract one, since the LSB of the mantissa will be > | |
58 | // 2^0; that is, the exponent (base 2) will be larger than | |
59 | // the length, in bits, of the mantissa. In that case, we | |
60 | // can't give a correct answer, so we set the remainder to | |
61 | // zero. This has the desired effect of making extreme | |
62 | // values give back an approximate answer rather than | |
63 | // crashing. For example, UDate values above a ~10^25 | |
64 | // might all have a time of midnight. | |
65 | remainder = 0; | |
66 | } else { | |
67 | remainder = dividend - (quotient * divisor); | |
68 | } | |
69 | } | |
70 | U_ASSERT(0 <= remainder && remainder < divisor); | |
71 | return quotient; | |
72 | } | |
73 | ||
74 | const int32_t JULIAN_1_CE = 1721426; // January 1, 1 CE Gregorian | |
75 | const int32_t JULIAN_1970_CE = 2440588; // January 1, 1970 CE Gregorian | |
76 | ||
77 | const int16_t Grego::DAYS_BEFORE[24] = | |
78 | {0,31,59,90,120,151,181,212,243,273,304,334, | |
79 | 0,31,60,91,121,152,182,213,244,274,305,335}; | |
80 | ||
81 | const int8_t Grego::MONTH_LENGTH[24] = | |
82 | {31,28,31,30,31,30,31,31,30,31,30,31, | |
83 | 31,29,31,30,31,30,31,31,30,31,30,31}; | |
84 | ||
85 | double Grego::fieldsToDay(int32_t year, int32_t month, int32_t dom) { | |
86 | ||
87 | int32_t y = year - 1; | |
88 | ||
729e4ab9 A |
89 | double julian = 365 * y + ClockMath::floorDivide(y, 4) + (JULIAN_1_CE - 3) + // Julian cal |
90 | ClockMath::floorDivide(y, 400) - ClockMath::floorDivide(y, 100) + 2 + // => Gregorian cal | |
374ca955 A |
91 | DAYS_BEFORE[month + (isLeapYear(year) ? 12 : 0)] + dom; // => month/dom |
92 | ||
93 | return julian - JULIAN_1970_CE; // JD => epoch day | |
94 | } | |
95 | ||
96 | void Grego::dayToFields(double day, int32_t& year, int32_t& month, | |
97 | int32_t& dom, int32_t& dow, int32_t& doy) { | |
98 | ||
99 | // Convert from 1970 CE epoch to 1 CE epoch (Gregorian calendar) | |
100 | day += JULIAN_1970_CE - JULIAN_1_CE; | |
101 | ||
102 | // Convert from the day number to the multiple radix | |
103 | // representation. We use 400-year, 100-year, and 4-year cycles. | |
104 | // For example, the 4-year cycle has 4 years + 1 leap day; giving | |
105 | // 1461 == 365*4 + 1 days. | |
729e4ab9 A |
106 | int32_t n400 = ClockMath::floorDivide(day, 146097, doy); // 400-year cycle length |
107 | int32_t n100 = ClockMath::floorDivide(doy, 36524, doy); // 100-year cycle length | |
108 | int32_t n4 = ClockMath::floorDivide(doy, 1461, doy); // 4-year cycle length | |
109 | int32_t n1 = ClockMath::floorDivide(doy, 365, doy); | |
374ca955 A |
110 | year = 400*n400 + 100*n100 + 4*n4 + n1; |
111 | if (n100 == 4 || n1 == 4) { | |
112 | doy = 365; // Dec 31 at end of 4- or 400-year cycle | |
113 | } else { | |
114 | ++year; | |
115 | } | |
116 | ||
117 | UBool isLeap = isLeapYear(year); | |
118 | ||
119 | // Gregorian day zero is a Monday. | |
120 | dow = (int32_t) uprv_fmod(day + 1, 7); | |
121 | dow += (dow < 0) ? (UCAL_SUNDAY + 7) : UCAL_SUNDAY; | |
122 | ||
123 | // Common Julian/Gregorian calculation | |
124 | int32_t correction = 0; | |
125 | int32_t march1 = isLeap ? 60 : 59; // zero-based DOY for March 1 | |
126 | if (doy >= march1) { | |
127 | correction = isLeap ? 1 : 2; | |
128 | } | |
129 | month = (12 * (doy + correction) + 6) / 367; // zero-based month | |
130 | dom = doy - DAYS_BEFORE[month + (isLeap ? 12 : 0)] + 1; // one-based DOM | |
131 | doy++; // one-based doy | |
132 | } | |
133 | ||
46f4442e A |
134 | void Grego::timeToFields(UDate time, int32_t& year, int32_t& month, |
135 | int32_t& dom, int32_t& dow, int32_t& doy, int32_t& mid) { | |
136 | double millisInDay; | |
729e4ab9 | 137 | double day = ClockMath::floorDivide((double)time, (double)U_MILLIS_PER_DAY, millisInDay); |
46f4442e A |
138 | mid = (int32_t)millisInDay; |
139 | dayToFields(day, year, month, dom, dow, doy); | |
140 | } | |
141 | ||
142 | int32_t Grego::dayOfWeek(double day) { | |
143 | int32_t dow; | |
729e4ab9 | 144 | ClockMath::floorDivide(day + UCAL_THURSDAY, 7, dow); |
46f4442e A |
145 | return (dow == 0) ? UCAL_SATURDAY : dow; |
146 | } | |
147 | ||
148 | int32_t Grego::dayOfWeekInMonth(int32_t year, int32_t month, int32_t dom) { | |
149 | int32_t weekInMonth = (dom + 6)/7; | |
150 | if (weekInMonth == 4) { | |
151 | if (dom + 7 > monthLength(year, month)) { | |
152 | weekInMonth = -1; | |
153 | } | |
154 | } else if (weekInMonth == 5) { | |
155 | weekInMonth = -1; | |
156 | } | |
157 | return weekInMonth; | |
158 | } | |
159 | ||
374ca955 A |
160 | /* ---- CalendarData ------ */ |
161 | ||
162 | #define U_CALENDAR_KEY "calendar" | |
163 | #define U_GREGORIAN_KEY "gregorian" | |
164 | #define U_FORMAT_KEY "format" | |
165 | #define U_DEFAULT_KEY "default" | |
166 | #define U_CALENDAR_DATA ((char*)0) | |
167 | ||
168 | ||
374ca955 A |
169 | // CalendarData::CalendarData(const Locale& loc, UErrorCode& status) |
170 | // : fFillin(NULL), fBundle(NULL), fFallback(NULL) { | |
171 | // initData(loc.getBaseName(), (char*) "???", status); | |
172 | // } | |
173 | ||
174 | CalendarData::CalendarData(const Locale& loc, const char *type, UErrorCode& status) | |
175 | : fFillin(NULL), fOtherFillin(NULL), fBundle(NULL), fFallback(NULL) { | |
176 | initData(loc.getBaseName(), type, status); | |
177 | } | |
178 | ||
179 | void CalendarData::initData(const char *locale, const char *type, UErrorCode& status) { | |
180 | fOtherFillin = ures_open(U_CALENDAR_DATA, locale, &status); | |
181 | fFillin = ures_getByKey(fOtherFillin, U_CALENDAR_KEY, fFillin, &status); | |
182 | ||
183 | if((type != NULL) && | |
184 | (*type != '\0') && | |
185 | (uprv_strcmp(type, U_GREGORIAN_KEY))) | |
186 | { | |
187 | fBundle = ures_getByKeyWithFallback(fFillin, type, NULL, &status); | |
188 | fFallback = ures_getByKeyWithFallback(fFillin, U_GREGORIAN_KEY, NULL, &status); | |
189 | ||
190 | #if defined (U_DEBUG_CALDATA) | |
191 | fprintf(stderr, "%p: CalendarData(%s, %s, %s) -> main(%p, %s)=%s, fallback(%p, %s)=%s\n", | |
192 | this, locale, type, u_errorName(status), fBundle, type, fBundle?ures_getLocale(fBundle, &status):"", | |
193 | fFallback, U_GREGORIAN_KEY, fFallback?ures_getLocale(fFallback, &status):""); | |
194 | #endif | |
195 | ||
196 | } else { | |
197 | fBundle = ures_getByKeyWithFallback(fFillin, U_GREGORIAN_KEY, NULL, &status); | |
198 | #if defined (U_DEBUG_CALDATA) | |
199 | fprintf(stderr, "%p: CalendarData(%s, %s, %s) -> main(%p, %s)=%s, fallback = NULL\n", | |
200 | this, locale, type, u_errorName(status), fBundle, U_GREGORIAN_KEY, fBundle?ures_getLocale(fBundle, &status):"" ); | |
201 | #endif | |
202 | } | |
203 | } | |
204 | ||
205 | CalendarData::~CalendarData() { | |
206 | ures_close(fFillin); | |
207 | ures_close(fBundle); | |
208 | ures_close(fFallback); | |
209 | ures_close(fOtherFillin); | |
210 | } | |
211 | ||
212 | UResourceBundle* | |
213 | CalendarData::getByKey(const char *key, UErrorCode& status) { | |
214 | if(U_FAILURE(status)) { | |
215 | return NULL; | |
216 | } | |
217 | ||
218 | if(fBundle) { | |
219 | fFillin = ures_getByKeyWithFallback(fBundle, key, fFillin, &status); | |
220 | #if defined (U_DEBUG_CALDATA) | |
221 | fprintf(stderr, "%p: get %s -> %s - from MAIN %s\n",this, key, u_errorName(status), ures_getLocale(fFillin, &status)); | |
222 | #endif | |
223 | } | |
224 | if(fFallback && (status == U_MISSING_RESOURCE_ERROR)) { | |
225 | status = U_ZERO_ERROR; // retry with fallback (gregorian) | |
226 | fFillin = ures_getByKeyWithFallback(fFallback, key, fFillin, &status); | |
227 | #if defined (U_DEBUG_CALDATA) | |
228 | fprintf(stderr, "%p: get %s -> %s - from FALLBACK %s\n",this, key, u_errorName(status), ures_getLocale(fFillin, &status)); | |
229 | #endif | |
230 | } | |
231 | return fFillin; | |
232 | } | |
233 | ||
234 | UResourceBundle* CalendarData::getByKey2(const char *key, const char *subKey, UErrorCode& status) { | |
235 | if(U_FAILURE(status)) { | |
236 | return NULL; | |
237 | } | |
238 | ||
239 | if(fBundle) { | |
240 | #if defined (U_DEBUG_CALDATA) | |
241 | fprintf(stderr, "%p: //\n"); | |
242 | #endif | |
243 | fFillin = ures_getByKeyWithFallback(fBundle, key, fFillin, &status); | |
244 | fOtherFillin = ures_getByKeyWithFallback(fFillin, U_FORMAT_KEY, fOtherFillin, &status); | |
245 | fFillin = ures_getByKeyWithFallback(fOtherFillin, subKey, fFillin, &status); | |
246 | #if defined (U_DEBUG_CALDATA) | |
247 | fprintf(stderr, "%p: get %s/format/%s -> %s - from MAIN %s\n", this, key, subKey, u_errorName(status), ures_getLocale(fFillin, &status)); | |
248 | #endif | |
249 | } | |
250 | if(fFallback && (status == U_MISSING_RESOURCE_ERROR)) { | |
251 | status = U_ZERO_ERROR; // retry with fallback (gregorian) | |
252 | fFillin = ures_getByKeyWithFallback(fFallback, key, fFillin, &status); | |
253 | fOtherFillin = ures_getByKeyWithFallback(fFillin, U_FORMAT_KEY, fOtherFillin, &status); | |
254 | fFillin = ures_getByKeyWithFallback(fOtherFillin, subKey, fFillin, &status); | |
255 | #if defined (U_DEBUG_CALDATA) | |
256 | fprintf(stderr, "%p: get %s/format/%s -> %s - from FALLBACK %s\n",this, key, subKey, u_errorName(status), ures_getLocale(fFillin,&status)); | |
257 | #endif | |
258 | } | |
259 | ||
260 | //// handling of 'default' keyword on failure: Commented out for 3.0. | |
261 | // if((status == U_MISSING_RESOURCE_ERROR) && | |
262 | // uprv_strcmp(subKey,U_DEFAULT_KEY)) { // avoid recursion | |
263 | // #if defined (U_DEBUG_CALDATA) | |
264 | // fprintf(stderr, "%p: - attempting fallback -\n", this); | |
265 | // fflush(stderr); | |
266 | // #endif | |
267 | // UErrorCode subStatus = U_ZERO_ERROR; | |
268 | // int32_t len; | |
269 | // char kwBuf[128] = ""; | |
270 | // const UChar *kw; | |
271 | // /* fFillin = */ getByKey2(key, U_DEFAULT_KEY, subStatus); | |
272 | // kw = ures_getString(fFillin, &len, &subStatus); | |
273 | // if(len>126) { // too big | |
274 | // len = 0; | |
275 | // } | |
276 | // if(U_SUCCESS(subStatus) && (len>0)) { | |
277 | // u_UCharsToChars(kw, kwBuf, len+1); | |
278 | // if(*kwBuf && uprv_strcmp(kwBuf,subKey)) { | |
279 | // #if defined (U_DEBUG_CALDATA) | |
280 | // fprintf(stderr, "%p: trying %s/format/default -> \"%s\"\n",this, key, kwBuf); | |
281 | // #endif | |
282 | // // now try again with the default | |
283 | // status = U_ZERO_ERROR; | |
284 | // /* fFillin = */ getByKey2(key, kwBuf, status); | |
285 | // } | |
286 | // #if defined (U_DEBUG_CALDATA) | |
287 | // } else { | |
288 | // fprintf(stderr, "%p: could not load %s/format/default - fail out (%s)\n",this, key, kwBuf, u_errorName(status)); | |
289 | // #endif | |
290 | // } | |
291 | // } | |
292 | ||
293 | return fFillin; | |
294 | } | |
295 | ||
73c04bcf A |
296 | UResourceBundle* CalendarData::getByKey3(const char *key, const char *contextKey, const char *subKey, UErrorCode& status) { |
297 | if(U_FAILURE(status)) { | |
298 | return NULL; | |
299 | } | |
300 | ||
301 | if(fBundle) { | |
302 | #if defined (U_DEBUG_CALDATA) | |
303 | fprintf(stderr, "%p: //\n"); | |
304 | #endif | |
305 | fFillin = ures_getByKeyWithFallback(fBundle, key, fFillin, &status); | |
306 | fOtherFillin = ures_getByKeyWithFallback(fFillin, contextKey, fOtherFillin, &status); | |
307 | fFillin = ures_getByKeyWithFallback(fOtherFillin, subKey, fFillin, &status); | |
308 | #if defined (U_DEBUG_CALDATA) | |
309 | fprintf(stderr, "%p: get %s/%s/%s -> %s - from MAIN %s\n", this, key, contextKey, subKey, u_errorName(status), ures_getLocale(fFillin, &status)); | |
310 | #endif | |
311 | } | |
312 | if(fFallback && (status == U_MISSING_RESOURCE_ERROR)) { | |
313 | status = U_ZERO_ERROR; // retry with fallback (gregorian) | |
314 | fFillin = ures_getByKeyWithFallback(fFallback, key, fFillin, &status); | |
315 | fOtherFillin = ures_getByKeyWithFallback(fFillin, contextKey, fOtherFillin, &status); | |
316 | fFillin = ures_getByKeyWithFallback(fOtherFillin, subKey, fFillin, &status); | |
317 | #if defined (U_DEBUG_CALDATA) | |
318 | fprintf(stderr, "%p: get %s/%s/%s -> %s - from FALLBACK %s\n",this, key, contextKey, subKey, u_errorName(status), ures_getLocale(fFillin,&status)); | |
319 | #endif | |
320 | } | |
321 | ||
322 | return fFillin; | |
323 | } | |
374ca955 | 324 | |
46f4442e A |
325 | U_NAMESPACE_END |
326 | ||
374ca955 A |
327 | #endif |
328 | //eof |