time.cpp@ 99844

Last change on this file since 99844 was 99758, checked in by vboxsync, 19 months ago
IPRT: Make doxygen 1.9.6 happy. Mostly removing duplicate docs (iprt is documented in the header files). bugref:10442
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1	/* $Id: time.cpp 99758 2023-05-11 21:37:59Z vboxsync $ */
2	/** @file
3	* IPRT - Time.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* The contents of this file may alternatively be used under the terms
26	* of the Common Development and Distribution License Version 1.0
27	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28	* in the VirtualBox distribution, in which case the provisions of the
29	* CDDL are applicable instead of those of the GPL.
30	*
31	* You may elect to license modified versions of this file under the
32	* terms and conditions of either the GPL or the CDDL or both.
33	*
34	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35	*/
36
37
38	/*********************************************************************************************************************************
39	* Header Files *
40	*********************************************************************************************************************************/
41	#define LOG_GROUP RTLOGGROUP_TIME
42	#include <iprt/time.h>
43	#include "internal/iprt.h"
44
45	#include <iprt/assert.h>
46	#include <iprt/ctype.h>
47	#include <iprt/errcore.h>
48	#include <iprt/string.h>
49	#include "internal/time.h"
50
51
52	/*********************************************************************************************************************************
53	* Defined Constants And Macros *
54	*********************************************************************************************************************************/
55	/** The max year we possibly could implode. */
56	#define RTTIME_MAX_YEAR (292 + 1970)
57	/** The min year we possibly could implode. */
58	#define RTTIME_MIN_YEAR (-293 + 1970)
59
60	/** The max day supported by our time representation. (2262-04-11T23-47-16.854775807) */
61	#define RTTIME_MAX_DAY (365*292+71 + 101-1)
62	/** The min day supported by our time representation. (1677-09-21T00-12-43.145224192) */
63	#define RTTIME_MIN_DAY (365*-293-70 + 264-1)
64
65	/** The max nano second into the max day. (2262-04-11T23-47-16.854775807) */
66	#define RTTIME_MAX_DAY_NANO ( INT64_C(1000000000) * (233600 + 4760 + 16) + 854775807 )
67	/** The min nano second into the min day. (1677-09-21T00-12-43.145224192) */
68	#define RTTIME_MIN_DAY_NANO ( INT64_C(1000000000) * (003600 + 1260 + 43) + 145224192 )
69
70	/**
71	* Asserts that a_pTime is normalized.
72	*/
73	#define RTTIME_ASSERT_NORMALIZED(a_pTime) \
74	do \
75	{ \
76	Assert(RT_ABS((a_pTime)->offUTC) <= 840); \
77	Assert((a_pTime)->u32Nanosecond < 1000000000); \
78	Assert((a_pTime)->u8Second < 60); \
79	Assert((a_pTime)->u8Minute < 60); \
80	Assert((a_pTime)->u8Hour < 24); \
81	Assert((a_pTime)->u8Month >= 1 && (a_pTime)->u8Month <= 12); \
82	Assert((a_pTime)->u8WeekDay < 7); \
83	Assert((a_pTime)->u16YearDay >= 1); \
84	Assert((a_pTime)->u16YearDay <= (rtTimeIsLeapYear((a_pTime)->i32Year) ? 366 : 365)); \
85	Assert((a_pTime)->u8MonthDay >= 1 && (a_pTime)->u8MonthDay <= 31); \
86	} while (0)
87
88
89	/*********************************************************************************************************************************
90	* Global Variables *
91	*********************************************************************************************************************************/
92	/**
93	* Days per month in a common year.
94	*/
95	static const uint8_t g_acDaysInMonths[12] =
96	{
97	/Jan Feb Mar Arp May Jun Jul Aug Sep Oct Nov Dec /
98	31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
99	};
100
101	/**
102	* Days per month in a leap year.
103	*/
104	static const uint8_t g_acDaysInMonthsLeap[12] =
105	{
106	/Jan Feb Mar Arp May Jun Jul Aug Sep Oct Nov Dec /
107	31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
108	};
109
110	/**
111	* The day of year for each month in a common year.
112	*/
113	static const uint16_t g_aiDayOfYear[12 + 1] =
114	{
115	1, /* Jan */
116	1+31, /* Feb */
117	1+31+28, /* Mar */
118	1+31+28+31, /* Apr */
119	1+31+28+31+30, /* May */
120	1+31+28+31+30+31, /* Jun */
121	1+31+28+31+30+31+30, /* Jul */
122	1+31+28+31+30+31+30+31, /* Aug */
123	1+31+28+31+30+31+30+31+31, /* Sep */
124	1+31+28+31+30+31+30+31+31+30, /* Oct */
125	1+31+28+31+30+31+30+31+31+30+31, /* Nov */
126	1+31+28+31+30+31+30+31+31+30+31+30, /* Dec */
127	1+31+28+31+30+31+30+31+31+30+31+30+31
128	};
129
130	/**
131	* The day of year for each month in a leap year.
132	*/
133	static const uint16_t g_aiDayOfYearLeap[12 + 1] =
134	{
135	1, /* Jan */
136	1+31, /* Feb */
137	1+31+29, /* Mar */
138	1+31+29+31, /* Apr */
139	1+31+29+31+30, /* May */
140	1+31+29+31+30+31, /* Jun */
141	1+31+29+31+30+31+30, /* Jul */
142	1+31+29+31+30+31+30+31, /* Aug */
143	1+31+29+31+30+31+30+31+31, /* Sep */
144	1+31+29+31+30+31+30+31+31+30, /* Oct */
145	1+31+29+31+30+31+30+31+31+30+31, /* Nov */
146	1+31+29+31+30+31+30+31+31+30+31+30, /* Dec */
147	1+31+29+31+30+31+30+31+31+30+31+30+31
148	};
149
150	/** The index of 1970 in g_aoffYear */
151	#define OFF_YEAR_IDX_EPOCH 300
152	/** The year of the first index. */
153	#define OFF_YEAR_IDX_0_YEAR 1670
154
155	/**
156	* The number of days the 1st of January a year is offseted from 1970-01-01.
157	*/
158	static const int32_t g_aoffYear[] =
159	{
160	/1670:/ 365-300+-72, 365-299+-72, 365-298+-72, 365-297+-71, 365-296+-71, 365-295+-71, 365-294+-71, 365-293+-70, 365-292+-70, 365-291+-70,
161	/1680:/ 365-290+-70, 365-289+-69, 365-288+-69, 365-287+-69, 365-286+-69, 365-285+-68, 365-284+-68, 365-283+-68, 365-282+-68, 365-281+-67,
162	/1690:/ 365-280+-67, 365-279+-67, 365-278+-67, 365-277+-66, 365-276+-66, 365-275+-66, 365-274+-66, 365-273+-65, 365-272+-65, 365-271+-65,
163	/1700:/ 365-270+-65, 365-269+-65, 365-268+-65, 365-267+-65, 365-266+-65, 365-265+-64, 365-264+-64, 365-263+-64, 365-262+-64, 365-261+-63,
164	/1710:/ 365-260+-63, 365-259+-63, 365-258+-63, 365-257+-62, 365-256+-62, 365-255+-62, 365-254+-62, 365-253+-61, 365-252+-61, 365-251+-61,
165	/1720:/ 365-250+-61, 365-249+-60, 365-248+-60, 365-247+-60, 365-246+-60, 365-245+-59, 365-244+-59, 365-243+-59, 365-242+-59, 365-241+-58,
166	/1730:/ 365-240+-58, 365-239+-58, 365-238+-58, 365-237+-57, 365-236+-57, 365-235+-57, 365-234+-57, 365-233+-56, 365-232+-56, 365-231+-56,
167	/1740:/ 365-230+-56, 365-229+-55, 365-228+-55, 365-227+-55, 365-226+-55, 365-225+-54, 365-224+-54, 365-223+-54, 365-222+-54, 365-221+-53,
168	/1750:/ 365-220+-53, 365-219+-53, 365-218+-53, 365-217+-52, 365-216+-52, 365-215+-52, 365-214+-52, 365-213+-51, 365-212+-51, 365-211+-51,
169	/1760:/ 365-210+-51, 365-209+-50, 365-208+-50, 365-207+-50, 365-206+-50, 365-205+-49, 365-204+-49, 365-203+-49, 365-202+-49, 365-201+-48,
170	/1770:/ 365-200+-48, 365-199+-48, 365-198+-48, 365-197+-47, 365-196+-47, 365-195+-47, 365-194+-47, 365-193+-46, 365-192+-46, 365-191+-46,
171	/1780:/ 365-190+-46, 365-189+-45, 365-188+-45, 365-187+-45, 365-186+-45, 365-185+-44, 365-184+-44, 365-183+-44, 365-182+-44, 365-181+-43,
172	/1790:/ 365-180+-43, 365-179+-43, 365-178+-43, 365-177+-42, 365-176+-42, 365-175+-42, 365-174+-42, 365-173+-41, 365-172+-41, 365-171+-41,
173	/1800:/ 365-170+-41, 365-169+-41, 365-168+-41, 365-167+-41, 365-166+-41, 365-165+-40, 365-164+-40, 365-163+-40, 365-162+-40, 365-161+-39,
174	/1810:/ 365-160+-39, 365-159+-39, 365-158+-39, 365-157+-38, 365-156+-38, 365-155+-38, 365-154+-38, 365-153+-37, 365-152+-37, 365-151+-37,
175	/1820:/ 365-150+-37, 365-149+-36, 365-148+-36, 365-147+-36, 365-146+-36, 365-145+-35, 365-144+-35, 365-143+-35, 365-142+-35, 365-141+-34,
176	/1830:/ 365-140+-34, 365-139+-34, 365-138+-34, 365-137+-33, 365-136+-33, 365-135+-33, 365-134+-33, 365-133+-32, 365-132+-32, 365-131+-32,
177	/1840:/ 365-130+-32, 365-129+-31, 365-128+-31, 365-127+-31, 365-126+-31, 365-125+-30, 365-124+-30, 365-123+-30, 365-122+-30, 365-121+-29,
178	/1850:/ 365-120+-29, 365-119+-29, 365-118+-29, 365-117+-28, 365-116+-28, 365-115+-28, 365-114+-28, 365-113+-27, 365-112+-27, 365-111+-27,
179	/1860:/ 365-110+-27, 365-109+-26, 365-108+-26, 365-107+-26, 365-106+-26, 365-105+-25, 365-104+-25, 365-103+-25, 365-102+-25, 365-101+-24,
180	/1870:/ 365-100+-24, 365 -99+-24, 365* -98+-24, 365* -97+-23, 365* -96+-23, 365* -95+-23, 365* -94+-23, 365* -93+-22, 365* -92+-22, 365* -91+-22,
181	/1880:/ 365* -90+-22, 365* -89+-21, 365* -88+-21, 365* -87+-21, 365* -86+-21, 365* -85+-20, 365* -84+-20, 365* -83+-20, 365* -82+-20, 365* -81+-19,
182	/1890:/ 365* -80+-19, 365* -79+-19, 365* -78+-19, 365* -77+-18, 365* -76+-18, 365* -75+-18, 365* -74+-18, 365* -73+-17, 365* -72+-17, 365* -71+-17,
183	/1900:/ 365* -70+-17, 365* -69+-17, 365* -68+-17, 365* -67+-17, 365* -66+-17, 365* -65+-16, 365* -64+-16, 365* -63+-16, 365* -62+-16, 365* -61+-15,
184	/1910:/ 365* -60+-15, 365* -59+-15, 365* -58+-15, 365* -57+-14, 365* -56+-14, 365* -55+-14, 365* -54+-14, 365* -53+-13, 365* -52+-13, 365* -51+-13,
185	/1920:/ 365* -50+-13, 365* -49+-12, 365* -48+-12, 365* -47+-12, 365* -46+-12, 365* -45+-11, 365* -44+-11, 365* -43+-11, 365* -42+-11, 365* -41+-10,
186	/1930:/ 365* -40+-10, 365* -39+-10, 365* -38+-10, 365* -37+-9 , 365* -36+-9 , 365* -35+-9 , 365* -34+-9 , 365* -33+-8 , 365* -32+-8 , 365* -31+-8 ,
187	/1940:/ 365* -30+-8 , 365* -29+-7 , 365* -28+-7 , 365* -27+-7 , 365* -26+-7 , 365* -25+-6 , 365* -24+-6 , 365* -23+-6 , 365* -22+-6 , 365* -21+-5 ,
188	/1950:/ 365* -20+-5 , 365* -19+-5 , 365* -18+-5 , 365* -17+-4 , 365* -16+-4 , 365* -15+-4 , 365* -14+-4 , 365* -13+-3 , 365* -12+-3 , 365* -11+-3 ,
189	/1960:/ 365* -10+-3 , 365* -9+-2 , 365* -8+-2 , 365* -7+-2 , 365* -6+-2 , 365* -5+-1 , 365* -4+-1 , 365* -3+-1 , 365* -2+-1 , 365* -1+0 ,
190	/1970:/ 365* 0+0 , 365* 1+0 , 365* 2+0 , 365* 3+1 , 365* 4+1 , 365* 5+1 , 365* 6+1 , 365* 7+2 , 365* 8+2 , 365* 9+2 ,
191	/1980:/ 365* 10+2 , 365* 11+3 , 365* 12+3 , 365* 13+3 , 365* 14+3 , 365* 15+4 , 365* 16+4 , 365* 17+4 , 365* 18+4 , 365* 19+5 ,
192	/1990:/ 365* 20+5 , 365* 21+5 , 365* 22+5 , 365* 23+6 , 365* 24+6 , 365* 25+6 , 365* 26+6 , 365* 27+7 , 365* 28+7 , 365* 29+7 ,
193	/2000:/ 365* 30+7 , 365* 31+8 , 365* 32+8 , 365* 33+8 , 365* 34+8 , 365* 35+9 , 365* 36+9 , 365* 37+9 , 365* 38+9 , 365* 39+10 ,
194	/2010:/ 365* 40+10 , 365* 41+10 , 365* 42+10 , 365* 43+11 , 365* 44+11 , 365* 45+11 , 365* 46+11 , 365* 47+12 , 365* 48+12 , 365* 49+12 ,
195	/2020:/ 365* 50+12 , 365* 51+13 , 365* 52+13 , 365* 53+13 , 365* 54+13 , 365* 55+14 , 365* 56+14 , 365* 57+14 , 365* 58+14 , 365* 59+15 ,
196	/2030:/ 365* 60+15 , 365* 61+15 , 365* 62+15 , 365* 63+16 , 365* 64+16 , 365* 65+16 , 365* 66+16 , 365* 67+17 , 365* 68+17 , 365* 69+17 ,
197	/2040:/ 365* 70+17 , 365* 71+18 , 365* 72+18 , 365* 73+18 , 365* 74+18 , 365* 75+19 , 365* 76+19 , 365* 77+19 , 365* 78+19 , 365* 79+20 ,
198	/2050:/ 365* 80+20 , 365* 81+20 , 365* 82+20 , 365* 83+21 , 365* 84+21 , 365* 85+21 , 365* 86+21 , 365* 87+22 , 365* 88+22 , 365* 89+22 ,
199	/2060:/ 365* 90+22 , 365* 91+23 , 365* 92+23 , 365* 93+23 , 365* 94+23 , 365* 95+24 , 365* 96+24 , 365* 97+24 , 365* 98+24 , 365* 99+25 ,
200	/2070:/ 365* 100+25 , 365* 101+25 , 365* 102+25 , 365* 103+26 , 365* 104+26 , 365* 105+26 , 365* 106+26 , 365* 107+27 , 365* 108+27 , 365* 109+27 ,
201	/2080:/ 365* 110+27 , 365* 111+28 , 365* 112+28 , 365* 113+28 , 365* 114+28 , 365* 115+29 , 365* 116+29 , 365* 117+29 , 365* 118+29 , 365* 119+30 ,
202	/2090:/ 365* 120+30 , 365* 121+30 , 365* 122+30 , 365* 123+31 , 365* 124+31 , 365* 125+31 , 365* 126+31 , 365* 127+32 , 365* 128+32 , 365* 129+32 ,
203	/2100:/ 365* 130+32 , 365* 131+32 , 365* 132+32 , 365* 133+32 , 365* 134+32 , 365* 135+33 , 365* 136+33 , 365* 137+33 , 365* 138+33 , 365* 139+34 ,
204	/2110:/ 365* 140+34 , 365* 141+34 , 365* 142+34 , 365* 143+35 , 365* 144+35 , 365* 145+35 , 365* 146+35 , 365* 147+36 , 365* 148+36 , 365* 149+36 ,
205	/2120:/ 365* 150+36 , 365* 151+37 , 365* 152+37 , 365* 153+37 , 365* 154+37 , 365* 155+38 , 365* 156+38 , 365* 157+38 , 365* 158+38 , 365* 159+39 ,
206	/2130:/ 365* 160+39 , 365* 161+39 , 365* 162+39 , 365* 163+40 , 365* 164+40 , 365* 165+40 , 365* 166+40 , 365* 167+41 , 365* 168+41 , 365* 169+41 ,
207	/2140:/ 365* 170+41 , 365* 171+42 , 365* 172+42 , 365* 173+42 , 365* 174+42 , 365* 175+43 , 365* 176+43 , 365* 177+43 , 365* 178+43 , 365* 179+44 ,
208	/2150:/ 365* 180+44 , 365* 181+44 , 365* 182+44 , 365* 183+45 , 365* 184+45 , 365* 185+45 , 365* 186+45 , 365* 187+46 , 365* 188+46 , 365* 189+46 ,
209	/2160:/ 365* 190+46 , 365* 191+47 , 365* 192+47 , 365* 193+47 , 365* 194+47 , 365* 195+48 , 365* 196+48 , 365* 197+48 , 365* 198+48 , 365* 199+49 ,
210	/2170:/ 365* 200+49 , 365* 201+49 , 365* 202+49 , 365* 203+50 , 365* 204+50 , 365* 205+50 , 365* 206+50 , 365* 207+51 , 365* 208+51 , 365* 209+51 ,
211	/2180:/ 365* 210+51 , 365* 211+52 , 365* 212+52 , 365* 213+52 , 365* 214+52 , 365* 215+53 , 365* 216+53 , 365* 217+53 , 365* 218+53 , 365* 219+54 ,
212	/2190:/ 365* 220+54 , 365* 221+54 , 365* 222+54 , 365* 223+55 , 365* 224+55 , 365* 225+55 , 365* 226+55 , 365* 227+56 , 365* 228+56 , 365* 229+56 ,
213	/2200:/ 365* 230+56 , 365* 231+56 , 365* 232+56 , 365* 233+56 , 365* 234+56 , 365* 235+57 , 365* 236+57 , 365* 237+57 , 365* 238+57 , 365* 239+58 ,
214	/2210:/ 365* 240+58 , 365* 241+58 , 365* 242+58 , 365* 243+59 , 365* 244+59 , 365* 245+59 , 365* 246+59 , 365* 247+60 , 365* 248+60 , 365* 249+60 ,
215	/2220:/ 365* 250+60 , 365* 251+61 , 365* 252+61 , 365* 253+61 , 365* 254+61 , 365* 255+62 , 365* 256+62 , 365* 257+62 , 365* 258+62 , 365* 259+63 ,
216	/2230:/ 365* 260+63 , 365* 261+63 , 365* 262+63 , 365* 263+64 , 365* 264+64 , 365* 265+64 , 365* 266+64 , 365* 267+65 , 365* 268+65 , 365* 269+65 ,
217	/2240:/ 365* 270+65 , 365* 271+66 , 365* 272+66 , 365* 273+66 , 365* 274+66 , 365* 275+67 , 365* 276+67 , 365* 277+67 , 365* 278+67 , 365* 279+68 ,
218	/2250:/ 365* 280+68 , 365* 281+68 , 365* 282+68 , 365* 283+69 , 365* 284+69 , 365* 285+69 , 365* 286+69 , 365* 287+70 , 365* 288+70 , 365* 289+70 ,
219	/2260:/ 365* 290+70 , 365* 291+71 , 365* 292+71 , 365* 293+71 , 365* 294+71 , 365* 295+72 , 365* 296+72 , 365* 297+72 , 365* 298+72 , 365* 299+73
220	};
221
222	/* generator code:
223	#include <stdio.h>
224	bool isLeapYear(int iYear)
225	{
226	return iYear % 4 == 0 && (iYear % 100 != 0 \|\| iYear % 400 == 0);
227	}
228	void printYear(int iYear, int iLeap)
229	{
230	if (!(iYear % 10))
231	printf("\n/" "%d:" "/", iYear + 1970);
232	printf(" 365*%4d+%-3d,", iYear, iLeap);
233	}
234	int main()
235	{
236	int iYear = 0;
237	int iLeap = 0;
238	while (iYear > -300)
239	iLeap -= isLeapYear(1970 + --iYear);
240	while (iYear < 300)
241	{
242	printYear(iYear, iLeap);
243	iLeap += isLeapYear(1970 + iYear++);
244	}
245	printf("\n");
246	return 0;
247	}
248	*/
249
250	/** RFC-1123 week day names. */
251	static const char * const g_apszWeekDays[7] =
252	{
253	"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"
254	};
255	/** RFC-1123 month of the year names. */
256	static const char * const g_apszMonths[1+12] =
257	{
258	"000", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
259	};
260
261
262	/**
263	* Checks if a year is a leap year or not.
264	*
265	* @returns true if it's a leap year.
266	* @returns false if it's a common year.
267	* @param i32Year The year in question.
268	*/
269	DECLINLINE(bool) rtTimeIsLeapYear(int32_t i32Year)
270	{
271	return i32Year % 4 == 0
272	&& ( i32Year % 100 != 0
273	\|\| i32Year % 400 == 0);
274	}
275
276
277	RTDECL(bool) RTTimeIsLeapYear(int32_t i32Year)
278	{
279	return rtTimeIsLeapYear(i32Year);
280	}
281	RT_EXPORT_SYMBOL(RTTimeIsLeapYear);
282
283
284	RTDECL(PRTTIME) RTTimeExplode(PRTTIME pTime, PCRTTIMESPEC pTimeSpec)
285	{
286	int64_t i64Div;
287	int32_t i32Div;
288	int32_t i32Rem;
289	unsigned iYear;
290	const uint16_t *paiDayOfYear;
291	int iMonth;
292
293	AssertPtr(pTime);
294	AssertPtr(pTimeSpec);
295
296	/*
297	* The simple stuff first.
298	*/
299	pTime->fFlags = RTTIME_FLAGS_TYPE_UTC;
300	i64Div = pTimeSpec->i64NanosecondsRelativeToUnixEpoch;
301	i32Rem = (int32_t)(i64Div % 1000000000);
302	i64Div /= 1000000000;
303	if (i32Rem < 0)
304	{
305	i32Rem += 1000000000;
306	i64Div--;
307	}
308	pTime->u32Nanosecond = i32Rem;
309
310	/* second */
311	i32Rem = (int32_t)(i64Div % 60);
312	i64Div /= 60;
313	if (i32Rem < 0)
314	{
315	i32Rem += 60;
316	i64Div--;
317	}
318	pTime->u8Second = i32Rem;
319
320	/* minute */
321	i32Div = (int32_t)i64Div; /* 60,000,000,000 > 33bit, so 31bit suffices. */
322	i32Rem = i32Div % 60;
323	i32Div /= 60;
324	if (i32Rem < 0)
325	{
326	i32Rem += 60;
327	i32Div--;
328	}
329	pTime->u8Minute = i32Rem;
330
331	/* hour */
332	i32Rem = i32Div % 24;
333	i32Div /= 24; /* days relative to 1970-01-01 */
334	if (i32Rem < 0)
335	{
336	i32Rem += 24;
337	i32Div--;
338	}
339	pTime->u8Hour = i32Rem;
340
341	/* weekday - 1970-01-01 was a Thursday (3) */
342	pTime->u8WeekDay = ((int)(i32Div % 7) + 3 + 7) % 7;
343
344	/*
345	* We've now got a number of days relative to 1970-01-01.
346	* To get the correct year number we have to mess with leap years. Fortunately,
347	* the representation we've got only supports a few hundred years, so we can
348	* generate a table and perform a simple two way search from the modulus 365 derived.
349	*/
350	iYear = OFF_YEAR_IDX_EPOCH + i32Div / 365;
351	while (g_aoffYear[iYear + 1] <= i32Div)
352	iYear++;
353	while (g_aoffYear[iYear] > i32Div)
354	iYear--;
355	pTime->i32Year = iYear + OFF_YEAR_IDX_0_YEAR;
356	i32Div -= g_aoffYear[iYear];
357	pTime->u16YearDay = i32Div + 1;
358
359	/*
360	* Figuring out the month is done in a manner similar to the year, only here we
361	* ensure that the index is matching or too small.
362	*/
363	if (rtTimeIsLeapYear(pTime->i32Year))
364	{
365	pTime->fFlags \|= RTTIME_FLAGS_LEAP_YEAR;
366	paiDayOfYear = &g_aiDayOfYearLeap[0];
367	}
368	else
369	{
370	pTime->fFlags \|= RTTIME_FLAGS_COMMON_YEAR;
371	paiDayOfYear = &g_aiDayOfYear[0];
372	}
373	iMonth = i32Div / 32;
374	i32Div++;
375	while (paiDayOfYear[iMonth + 1] <= i32Div)
376	iMonth++;
377	pTime->u8Month = iMonth + 1;
378	i32Div -= paiDayOfYear[iMonth];
379	pTime->u8MonthDay = i32Div + 1;
380
381	/* This is for UTC timespecs, so, no offset. */
382	pTime->offUTC = 0;
383
384	return pTime;
385	}
386	RT_EXPORT_SYMBOL(RTTimeExplode);
387
388
389	RTDECL(PRTTIMESPEC) RTTimeImplode(PRTTIMESPEC pTimeSpec, PCRTTIME pTime)
390	{
391	int32_t i32Days;
392	uint32_t u32Secs;
393	int64_t i64Nanos;
394
395	/*
396	* Validate input.
397	*/
398	AssertPtrReturn(pTimeSpec, NULL);
399	AssertPtrReturn(pTime, NULL);
400	AssertReturn(pTime->u32Nanosecond < 1000000000, NULL);
401	AssertReturn(pTime->u8Second < 60, NULL);
402	AssertReturn(pTime->u8Minute < 60, NULL);
403	AssertReturn(pTime->u8Hour < 24, NULL);
404	AssertReturn(pTime->u16YearDay >= 1, NULL);
405	AssertReturn(pTime->u16YearDay <= (rtTimeIsLeapYear(pTime->i32Year) ? 366 : 365), NULL);
406	AssertMsgReturn(pTime->i32Year <= RTTIME_MAX_YEAR && pTime->i32Year >= RTTIME_MIN_YEAR, ("%RI32\n", pTime->i32Year), NULL);
407	Assert(pTime->offUTC >= -840 && pTime->offUTC <= 840);
408
409	/*
410	* Do the conversion to nanoseconds.
411	*/
412	i32Days = g_aoffYear[pTime->i32Year - OFF_YEAR_IDX_0_YEAR]
413	+ pTime->u16YearDay - 1;
414	AssertMsgReturn(i32Days <= RTTIME_MAX_DAY && i32Days >= RTTIME_MIN_DAY, ("%RI32\n", i32Days), NULL);
415
416	u32Secs = pTime->u8Second
417	+ pTime->u8Minute * 60
418	+ pTime->u8Hour * 3600;
419	i64Nanos = (uint64_t)pTime->u32Nanosecond
420	+ u32Secs * UINT64_C(1000000000);
421	AssertMsgReturn(i32Days != RTTIME_MAX_DAY \|\| i64Nanos <= RTTIME_MAX_DAY_NANO, ("%RI64\n", i64Nanos), NULL);
422	AssertMsgReturn(i32Days != RTTIME_MIN_DAY \|\| i64Nanos >= RTTIME_MIN_DAY_NANO, ("%RI64\n", i64Nanos), NULL);
423
424	i64Nanos += i32Days * UINT64_C(86400000000000);
425	if ((pTime->fFlags & RTTIME_FLAGS_TYPE_MASK) == RTTIME_FLAGS_TYPE_LOCAL)
426	i64Nanos -= pTime->offUTC * RT_NS_1MIN;
427
428	pTimeSpec->i64NanosecondsRelativeToUnixEpoch = i64Nanos;
429	return pTimeSpec;
430	}
431	RT_EXPORT_SYMBOL(RTTimeImplode);
432
433
434	/**
435	* Internal worker for RTTimeNormalize and RTTimeLocalNormalize.
436	*/
437	static PRTTIME rtTimeNormalizeInternal(PRTTIME pTime)
438	{
439	unsigned uSecond;
440	unsigned uMinute;
441	unsigned uHour;
442	bool fLeapYear;
443
444	/*
445	* Fix the YearDay and Month/MonthDay.
446	*/
447	fLeapYear = rtTimeIsLeapYear(pTime->i32Year);
448	if (!pTime->u16YearDay)
449	{
450	/*
451	* The Month+MonthDay must present, overflow adjust them and calc the year day.
452	*/
453	AssertMsgReturn( pTime->u8Month
454	&& pTime->u8MonthDay,
455	("date=%d-%d-%d\n", pTime->i32Year, pTime->u8Month, pTime->u8MonthDay),
456	NULL);
457	while (pTime->u8Month > 12)
458	{
459	pTime->u8Month -= 12;
460	pTime->i32Year++;
461	fLeapYear = rtTimeIsLeapYear(pTime->i32Year);
462	pTime->fFlags &= ~(RTTIME_FLAGS_COMMON_YEAR \| RTTIME_FLAGS_LEAP_YEAR);
463	}
464
465	for (;;)
466	{
467	unsigned cDaysInMonth = fLeapYear
468	? g_acDaysInMonthsLeap[pTime->u8Month - 1]
469	: g_acDaysInMonths[pTime->u8Month - 1];
470	if (pTime->u8MonthDay <= cDaysInMonth)
471	break;
472	pTime->u8MonthDay -= cDaysInMonth;
473	if (pTime->u8Month != 12)
474	pTime->u8Month++;
475	else
476	{
477	pTime->u8Month = 1;
478	pTime->i32Year++;
479	fLeapYear = rtTimeIsLeapYear(pTime->i32Year);
480	pTime->fFlags &= ~(RTTIME_FLAGS_COMMON_YEAR \| RTTIME_FLAGS_LEAP_YEAR);
481	}
482	}
483
484	pTime->u16YearDay = pTime->u8MonthDay - 1
485	+ (fLeapYear
486	? g_aiDayOfYearLeap[pTime->u8Month - 1]
487	: g_aiDayOfYear[pTime->u8Month - 1]);
488	}
489	else
490	{
491	/*
492	* Are both YearDay and Month/MonthDay valid?
493	* Check that they don't overflow and match, if not use YearDay (simpler).
494	*/
495	bool fRecalc = true;
496	if ( pTime->u8Month
497	&& pTime->u8MonthDay)
498	{
499	do
500	{
501	uint16_t u16YearDay;
502
503	/* If you change one, zero the other to make clear what you mean. */
504	AssertBreak(pTime->u8Month <= 12);
505	AssertBreak(pTime->u8MonthDay <= (fLeapYear
506	? g_acDaysInMonthsLeap[pTime->u8Month - 1]
507	: g_acDaysInMonths[pTime->u8Month - 1]));
508	u16YearDay = pTime->u8MonthDay - 1
509	+ (fLeapYear
510	? g_aiDayOfYearLeap[pTime->u8Month - 1]
511	: g_aiDayOfYear[pTime->u8Month - 1]);
512	AssertBreak(u16YearDay == pTime->u16YearDay);
513	fRecalc = false;
514	} while (0);
515	}
516	if (fRecalc)
517	{
518	const uint16_t *paiDayOfYear;
519
520	/* overflow adjust YearDay */
521	while (pTime->u16YearDay > (fLeapYear ? 366 : 365))
522	{
523	pTime->u16YearDay -= fLeapYear ? 366 : 365;
524	pTime->i32Year++;
525	fLeapYear = rtTimeIsLeapYear(pTime->i32Year);
526	pTime->fFlags &= ~(RTTIME_FLAGS_COMMON_YEAR \| RTTIME_FLAGS_LEAP_YEAR);
527	}
528
529	/* calc Month and MonthDay */
530	paiDayOfYear = fLeapYear
531	? &g_aiDayOfYearLeap[0]
532	: &g_aiDayOfYear[0];
533	pTime->u8Month = 1;
534	while (pTime->u16YearDay >= paiDayOfYear[pTime->u8Month])
535	pTime->u8Month++;
536	Assert(pTime->u8Month >= 1 && pTime->u8Month <= 12);
537	pTime->u8MonthDay = pTime->u16YearDay - paiDayOfYear[pTime->u8Month - 1] + 1;
538	}
539	}
540
541	/*
542	* Fixup time overflows.
543	* Use unsigned int values internally to avoid overflows.
544	*/
545	uSecond = pTime->u8Second;
546	uMinute = pTime->u8Minute;
547	uHour = pTime->u8Hour;
548
549	while (pTime->u32Nanosecond >= 1000000000)
550	{
551	pTime->u32Nanosecond -= 1000000000;
552	uSecond++;
553	}
554
555	while (uSecond >= 60)
556	{
557	uSecond -= 60;
558	uMinute++;
559	}
560
561	while (uMinute >= 60)
562	{
563	uMinute -= 60;
564	uHour++;
565	}
566
567	while (uHour >= 24)
568	{
569	uHour -= 24;
570
571	/* This is really a RTTimeIncDay kind of thing... */
572	if (pTime->u16YearDay + 1 != (fLeapYear ? g_aiDayOfYearLeap[pTime->u8Month] : g_aiDayOfYear[pTime->u8Month]))
573	{
574	pTime->u16YearDay++;
575	pTime->u8MonthDay++;
576	}
577	else if (pTime->u8Month != 12)
578	{
579	pTime->u16YearDay++;
580	pTime->u8Month++;
581	pTime->u8MonthDay = 1;
582	}
583	else
584	{
585	pTime->i32Year++;
586	fLeapYear = rtTimeIsLeapYear(pTime->i32Year);
587	pTime->fFlags &= ~(RTTIME_FLAGS_COMMON_YEAR \| RTTIME_FLAGS_LEAP_YEAR);
588	pTime->u16YearDay = 1;
589	pTime->u8Month = 1;
590	pTime->u8MonthDay = 1;
591	}
592	}
593
594	pTime->u8Second = uSecond;
595	pTime->u8Minute = uMinute;
596	pTime->u8Hour = uHour;
597
598	/*
599	* Correct the leap year flag.
600	* Assert if it's wrong, but ignore if unset.
601	*/
602	if (fLeapYear)
603	{
604	Assert(!(pTime->fFlags & RTTIME_FLAGS_COMMON_YEAR));
605	pTime->fFlags &= ~RTTIME_FLAGS_COMMON_YEAR;
606	pTime->fFlags \|= RTTIME_FLAGS_LEAP_YEAR;
607	}
608	else
609	{
610	Assert(!(pTime->fFlags & RTTIME_FLAGS_LEAP_YEAR));
611	pTime->fFlags &= ~RTTIME_FLAGS_LEAP_YEAR;
612	pTime->fFlags \|= RTTIME_FLAGS_COMMON_YEAR;
613	}
614
615
616	/*
617	* Calc week day.
618	*
619	* 1970-01-01 was a Thursday (3), so find the number of days relative to
620	* that point. We use the table when possible and a slow+stupid+brute-force
621	* algorithm for points outside it. Feel free to optimize the latter by
622	* using some clever formula.
623	*/
624	if ( pTime->i32Year >= OFF_YEAR_IDX_0_YEAR
625	&& pTime->i32Year < OFF_YEAR_IDX_0_YEAR + (int32_t)RT_ELEMENTS(g_aoffYear))
626	{
627	int32_t offDays = g_aoffYear[pTime->i32Year - OFF_YEAR_IDX_0_YEAR]
628	+ pTime->u16YearDay -1;
629	pTime->u8WeekDay = ((offDays % 7) + 3 + 7) % 7;
630	}
631	else
632	{
633	int32_t i32Year = pTime->i32Year;
634	if (i32Year >= 1970)
635	{
636	uint64_t offDays = pTime->u16YearDay - 1;
637	while (--i32Year >= 1970)
638	offDays += rtTimeIsLeapYear(i32Year) ? 366 : 365;
639	pTime->u8WeekDay = (uint8_t)((offDays + 3) % 7);
640	}
641	else
642	{
643	int64_t offDays = (fLeapYear ? -366 - 1 : -365 - 1) + pTime->u16YearDay;
644	while (++i32Year < 1970)
645	offDays -= rtTimeIsLeapYear(i32Year) ? 366 : 365;
646	pTime->u8WeekDay = ((int)(offDays % 7) + 3 + 7) % 7;
647	}
648	}
649	return pTime;
650	}
651
652
653	RTDECL(PRTTIME) RTTimeNormalize(PRTTIME pTime)
654	{
655	/*
656	* Validate that we've got the minimum of stuff handy.
657	*/
658	AssertPtrReturn(pTime, NULL);
659	AssertMsgReturn(!(pTime->fFlags & ~RTTIME_FLAGS_MASK), ("%#x\n", pTime->fFlags), NULL);
660	AssertMsgReturn((pTime->fFlags & RTTIME_FLAGS_TYPE_MASK) != RTTIME_FLAGS_TYPE_LOCAL, ("Use RTTimeLocalNormalize!\n"), NULL);
661	AssertMsgReturn(pTime->offUTC == 0, ("%d; Use RTTimeLocalNormalize!\n", pTime->offUTC), NULL);
662
663	pTime = rtTimeNormalizeInternal(pTime);
664	if (pTime)
665	pTime->fFlags \|= RTTIME_FLAGS_TYPE_UTC;
666	return pTime;
667	}
668	RT_EXPORT_SYMBOL(RTTimeNormalize);
669
670
671	RTDECL(PRTTIME) RTTimeLocalNormalize(PRTTIME pTime)
672	{
673	/*
674	* Validate that we've got the minimum of stuff handy.
675	*/
676	AssertPtrReturn(pTime, NULL);
677	AssertMsgReturn(!(pTime->fFlags & ~RTTIME_FLAGS_MASK), ("%#x\n", pTime->fFlags), NULL);
678	AssertMsgReturn((pTime->fFlags & RTTIME_FLAGS_TYPE_MASK) != RTTIME_FLAGS_TYPE_UTC, ("Use RTTimeNormalize!\n"), NULL);
679
680	pTime = rtTimeNormalizeInternal(pTime);
681	if (pTime)
682	pTime->fFlags \|= RTTIME_FLAGS_TYPE_LOCAL;
683	return pTime;
684	}
685	RT_EXPORT_SYMBOL(RTTimeLocalNormalize);
686
687
688	RTDECL(char ) RTTimeToString(PCRTTIME pTime, char psz, size_t cb)
689	{
690	size_t cch;
691
692	/* (Default to UTC if not specified) */
693	if ( (pTime->fFlags & RTTIME_FLAGS_TYPE_MASK) == RTTIME_FLAGS_TYPE_LOCAL
694	&& pTime->offUTC)
695	{
696	int32_t offUTC = pTime->offUTC;
697	Assert(offUTC <= 840 && offUTC >= -840);
698	char chSign;
699	if (offUTC >= 0)
700	chSign = '+';
701	else
702	{
703	chSign = '-';
704	offUTC = -offUTC;
705	}
706	uint32_t offUTCHour = (uint32_t)offUTC / 60;
707	uint32_t offUTCMinute = (uint32_t)offUTC % 60;
708	cch = RTStrPrintf(psz, cb,
709	"%RI32-%02u-%02uT%02u:%02u:%02u.%09RU32%c%02d%:02d",
710	pTime->i32Year, pTime->u8Month, pTime->u8MonthDay,
711	pTime->u8Hour, pTime->u8Minute, pTime->u8Second, pTime->u32Nanosecond,
712	chSign, offUTCHour, offUTCMinute);
713	if ( cch <= 15
714	\|\| psz[cch - 6] != chSign)
715	return NULL;
716	}
717	else
718	{
719	cch = RTStrPrintf(psz, cb, "%RI32-%02u-%02uT%02u:%02u:%02u.%09RU32Z",
720	pTime->i32Year, pTime->u8Month, pTime->u8MonthDay,
721	pTime->u8Hour, pTime->u8Minute, pTime->u8Second, pTime->u32Nanosecond);
722	if ( cch <= 15
723	\|\| psz[cch - 1] != 'Z')
724	return NULL;
725	}
726	return psz;
727	}
728	RT_EXPORT_SYMBOL(RTTimeToString);
729
730
731	RTDECL(ssize_t) RTTimeToStringEx(PCRTTIME pTime, char *psz, size_t cb, unsigned cFractionDigits)
732	{
733	size_t cch;
734
735	/* Format the fraction. */
736	char szFraction[16];
737	if (!cFractionDigits)
738	szFraction[0] = '\0';
739	else
740	{
741	AssertReturn(cFractionDigits <= 9, VERR_OUT_OF_RANGE);
742	Assert(pTime->u32Nanosecond <= 999999999);
743	RTStrPrintf(szFraction, sizeof(szFraction), ".%09RU32", pTime->u32Nanosecond);
744	szFraction[cFractionDigits + 1] = '\0';
745	}
746
747	/* (Default to UTC if not specified) */
748	if ( (pTime->fFlags & RTTIME_FLAGS_TYPE_MASK) == RTTIME_FLAGS_TYPE_LOCAL
749	&& pTime->offUTC)
750	{
751	int32_t offUTC = pTime->offUTC;
752	Assert(offUTC <= 840 && offUTC >= -840);
753	char chSign;
754	if (offUTC >= 0)
755	chSign = '+';
756	else
757	{
758	chSign = '-';
759	offUTC = -offUTC;
760	}
761	uint32_t offUTCHour = (uint32_t)offUTC / 60;
762	uint32_t offUTCMinute = (uint32_t)offUTC % 60;
763
764	/* Examples: 2018-09-07T16:12:00+02:00 2018-09-07T16:12:00.123456789+02:00 */
765	cch = RTStrPrintf(psz, cb,
766	"%04RI32-%02u-%02uT%02u:%02u:%02u%s%c%02d%:02d",
767	pTime->i32Year, pTime->u8Month, pTime->u8MonthDay,
768	pTime->u8Hour, pTime->u8Minute, pTime->u8Second, szFraction,
769	chSign, offUTCHour, offUTCMinute);
770	if ( cch >= 24
771	&& psz[cch - 6] == chSign)
772	return cch;
773	}
774	else
775	{
776	/* Examples: 2018-09-07T16:12:00Z 2018-09-07T16:12:00.123456789Z */
777	cch = RTStrPrintf(psz, cb, "%04RI32-%02u-%02uT%02u:%02u:%02u%sZ",
778	pTime->i32Year, pTime->u8Month, pTime->u8MonthDay,
779	pTime->u8Hour, pTime->u8Minute, pTime->u8Second, szFraction);
780	if ( cch >= 19
781	&& psz[cch - 1] == 'Z')
782	return cch;
783	}
784	return VERR_BUFFER_OVERFLOW;
785	}
786	RT_EXPORT_SYMBOL(RTTimeToStringEx);
787
788
789	RTDECL(char ) RTTimeSpecToString(PCRTTIMESPEC pTime, char psz, size_t cb)
790	{
791	RTTIME Time;
792	return RTTimeToString(RTTimeExplode(&Time, pTime), psz, cb);
793	}
794	RT_EXPORT_SYMBOL(RTTimeSpecToString);
795
796
797
798	RTDECL(PRTTIME) RTTimeFromString(PRTTIME pTime, const char *pszString)
799	{
800	/* Ignore leading spaces. */
801	while (RT_C_IS_SPACE(*pszString))
802	pszString++;
803
804	/*
805	* Init non date & time parts.
806	*/
807	pTime->fFlags = RTTIME_FLAGS_TYPE_LOCAL;
808	pTime->offUTC = 0;
809
810	/*
811	* The date part.
812	*/
813
814	/* Year */
815	int rc = RTStrToInt32Ex(pszString, (char **)&pszString, 10, &pTime->i32Year);
816	if (rc != VWRN_TRAILING_CHARS)
817	return NULL;
818
819	bool const fLeapYear = rtTimeIsLeapYear(pTime->i32Year);
820	if (fLeapYear)
821	pTime->fFlags \|= RTTIME_FLAGS_LEAP_YEAR;
822
823	if (*pszString++ != '-')
824	return NULL;
825
826	/* Month of the year. */
827	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8Month);
828	if (rc != VWRN_TRAILING_CHARS)
829	return NULL;
830	if (pTime->u8Month == 0 \|\| pTime->u8Month > 12)
831	return NULL;
832	if (*pszString++ != '-')
833	return NULL;
834
835	/* Day of month.*/
836	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8MonthDay);
837	if (rc != VWRN_TRAILING_CHARS && rc != VINF_SUCCESS)
838	return NULL;
839	unsigned const cDaysInMonth = fLeapYear
840	? g_acDaysInMonthsLeap[pTime->u8Month - 1]
841	: g_acDaysInMonths[pTime->u8Month - 1];
842	if (pTime->u8MonthDay == 0 \|\| pTime->u8MonthDay > cDaysInMonth)
843	return NULL;
844
845	/* Calculate year day. */
846	pTime->u16YearDay = pTime->u8MonthDay - 1
847	+ (fLeapYear
848	? g_aiDayOfYearLeap[pTime->u8Month - 1]
849	: g_aiDayOfYear[pTime->u8Month - 1]);
850
851	pTime->u8WeekDay = UINT8_MAX; /* later */
852
853	/*
854	* The time part.
855	*/
856	if (*pszString++ != 'T')
857	return NULL;
858
859	/* Hour. */
860	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8Hour);
861	if (rc != VWRN_TRAILING_CHARS)
862	return NULL;
863	if (pTime->u8Hour > 23)
864	return NULL;
865	if (*pszString++ != ':')
866	return NULL;
867
868	/* Minute. */
869	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8Minute);
870	if (rc != VWRN_TRAILING_CHARS)
871	return NULL;
872	if (pTime->u8Minute > 59)
873	return NULL;
874	if (*pszString++ != ':')
875	return NULL;
876
877	/* Second. */
878	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8Second);
879	if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS && rc != VWRN_TRAILING_SPACES)
880	return NULL;
881	if (pTime->u8Second > 59)
882	return NULL;
883
884	/* We generally put a 9 digit fraction here, but it's entirely optional. */
885	if (*pszString == '.')
886	{
887	const char * const pszStart = ++pszString;
888	rc = RTStrToUInt32Ex(pszString, (char **)&pszString, 10, &pTime->u32Nanosecond);
889	if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS && rc != VWRN_TRAILING_SPACES)
890	return NULL;
891	if (pTime->u32Nanosecond >= 1000000000)
892	return NULL;
893	switch (pszString - pszStart)
894	{
895	case 1: pTime->u32Nanosecond *= 100000000; break;
896	case 2: pTime->u32Nanosecond *= 10000000; break;
897	case 3: pTime->u32Nanosecond *= 1000000; break;
898	case 4: pTime->u32Nanosecond *= 100000; break;
899	case 5: pTime->u32Nanosecond *= 10000; break;
900	case 6: pTime->u32Nanosecond *= 1000; break;
901	case 7: pTime->u32Nanosecond *= 100; break;
902	case 8: pTime->u32Nanosecond *= 10; break;
903	case 9: break;
904	default:
905	return NULL;
906	}
907	if (pTime->u32Nanosecond >= 1000000000)
908	return NULL;
909	}
910	else
911	pTime->u32Nanosecond = 0;
912
913	/*
914	* Time zone.
915	*/
916	if (*pszString == 'Z')
917	{
918	pszString++;
919	pTime->fFlags &= ~RTTIME_FLAGS_TYPE_MASK;
920	pTime->fFlags \|= RTTIME_FLAGS_TYPE_UTC;
921	pTime->offUTC = 0;
922	}
923	else if ( *pszString == '+'
924	\|\| *pszString == '-')
925	{
926	int8_t cUtcHours = 0;
927	rc = RTStrToInt8Ex(pszString, (char **)&pszString, 10, &cUtcHours);
928	if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS && rc != VWRN_TRAILING_SPACES)
929	return NULL;
930	uint8_t cUtcMin = 0;
931	if (*pszString == ':')
932	{
933	rc = RTStrToUInt8Ex(pszString + 1, (char **)&pszString, 10, &cUtcMin);
934	if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_SPACES)
935	return NULL;
936	}
937	else if (pszString && !RT_C_IS_BLANK(pszString))
938	return NULL;
939	if (cUtcHours >= 0)
940	pTime->offUTC = cUtcHours * 60 + cUtcMin;
941	else
942	pTime->offUTC = cUtcHours * 60 - cUtcMin;
943	if (RT_ABS(pTime->offUTC) > 840)
944	return NULL;
945	}
946	/* else: No time zone given, local with offUTC = 0. */
947
948	/*
949	* The rest of the string should be blanks.
950	*/
951	char ch;
952	while ((ch = *pszString++) != '\0')
953	if (!RT_C_IS_BLANK(ch))
954	return NULL;
955
956	/* Calc week day. */
957	rtTimeNormalizeInternal(pTime);
958	return pTime;
959	}
960	RT_EXPORT_SYMBOL(RTTimeFromString);
961
962
963	RTDECL(PRTTIMESPEC) RTTimeSpecFromString(PRTTIMESPEC pTime, const char *pszString)
964	{
965	RTTIME Time;
966	if (RTTimeFromString(&Time, pszString))
967	return RTTimeImplode(pTime, &Time);
968	return NULL;
969	}
970	RT_EXPORT_SYMBOL(RTTimeSpecFromString);
971
972
973	RTDECL(ssize_t) RTTimeToRfc2822(PRTTIME pTime, char *psz, size_t cb, uint32_t fFlags)
974	{
975	Assert(pTime->u8Month > 0 && pTime->u8Month <= 12);
976	Assert(pTime->u8WeekDay < 7);
977	Assert(!(fFlags & ~RTTIME_RFC2822_F_GMT));
978
979	/* (Default to UTC if not specified) */
980	if ( (pTime->fFlags & RTTIME_FLAGS_TYPE_MASK) == RTTIME_FLAGS_TYPE_LOCAL
981	&& pTime->offUTC)
982	{
983	Assert(!(fFlags & RTTIME_RFC2822_F_GMT) /* don't call with local time. duh! */ );
984
985	/* Calc the UTC offset part. */
986	int32_t offUtc = pTime->offUTC;
987	Assert(offUtc <= 840 && offUtc >= -840);
988	char chSign;
989	if (offUtc >= 0)
990	chSign = '+';
991	else
992	{
993	chSign = '-';
994	offUtc = -offUtc;
995	}
996	uint32_t offUtcHour = (uint32_t)offUtc / 60;
997	uint32_t offUtcMinute = (uint32_t)offUtc % 60;
998
999	/* Example: "Mon, 31 Aug 2018 00:00:00 +0200" */
1000	size_t cch = RTStrPrintf(psz, cb, "%s, %u %s %04RI32 %02u:%02u:%02u %c%02u%02u", g_apszWeekDays[pTime->u8WeekDay],
1001	pTime->u8MonthDay, g_apszMonths[pTime->u8Month], pTime->i32Year,
1002	pTime->u8Hour, pTime->u8Minute, pTime->u8Second, chSign, offUtcHour, offUtcMinute);
1003	if ( cch >= 27
1004	&& psz[cch - 5] == chSign)
1005	return cch;
1006	}
1007	else if (fFlags & RTTIME_RFC2822_F_GMT)
1008	{
1009	/* Example: "Mon, 1 Jan 1971 23:55:59 GMT" */
1010	size_t cch = RTStrPrintf(psz, cb, "%s, %u %s %04RI32 %02u:%02u:%02u GMT", g_apszWeekDays[pTime->u8WeekDay],
1011	pTime->u8MonthDay, g_apszMonths[pTime->u8Month], pTime->i32Year,
1012	pTime->u8Hour, pTime->u8Minute, pTime->u8Second);
1013	if ( cch >= 27
1014	&& psz[cch - 1] == 'T')
1015	return cch;
1016	}
1017	else
1018	{
1019	/* Example: "Mon, 1 Jan 1971 00:00:00 -0000" */
1020	size_t cch = RTStrPrintf(psz, cb, "%s, %u %s %04RI32 %02u:%02u:%02u -0000", g_apszWeekDays[pTime->u8WeekDay],
1021	pTime->u8MonthDay, g_apszMonths[pTime->u8Month], pTime->i32Year,
1022	pTime->u8Hour, pTime->u8Minute, pTime->u8Second);
1023	if ( cch >= 27
1024	&& psz[cch - 5] == '-')
1025	return cch;
1026	}
1027	return VERR_BUFFER_OVERFLOW;
1028	}
1029	RT_EXPORT_SYMBOL(RTTimeToRfc2822);
1030
1031
1032	RTDECL(PRTTIME) RTTimeFromRfc2822(PRTTIME pTime, const char *pszString)
1033	{
1034	/*
1035	* Fri, 31 Aug 2018 00:00:00 +0200
1036	* Mon, 3 Sep 2018 00:00:00 GMT
1037	* Mon, 3 Sep 2018 00:00:00 -0000
1038	* 3 Sep 2018 00:00:00 -0000 (?)
1039	* 3 Sep 2018 00:00:00 GMT (?)
1040	*
1041	*/
1042
1043	/* Ignore leading spaces. */
1044	while (RT_C_IS_SPACE(*pszString))
1045	pszString++;
1046
1047	/*
1048	* Init non date & time parts.
1049	*/
1050	pTime->fFlags = RTTIME_FLAGS_TYPE_LOCAL;
1051	pTime->offUTC = 0;
1052
1053	/*
1054	* The date part.
1055	*/
1056
1057	/* Optional day of week: */
1058	if (RT_C_IS_ALPHA(pszString[0]) && pszString[1] != '\0')
1059	{
1060	uint32_t uWeekDay = RT_MAKE_U32_FROM_U8(RT_C_TO_LOWER(pszString[0]), RT_C_TO_LOWER(pszString[1]),
1061	RT_C_TO_LOWER(pszString[2]), 0);
1062	if ( uWeekDay == RT_MAKE_U32_FROM_U8('m', 'o', 'n', 0)) pTime->u8WeekDay = 0;
1063	else if (uWeekDay == RT_MAKE_U32_FROM_U8('t', 'u', 'e', 0)) pTime->u8WeekDay = 1;
1064	else if (uWeekDay == RT_MAKE_U32_FROM_U8('w', 'e', 'd', 0)) pTime->u8WeekDay = 2;
1065	else if (uWeekDay == RT_MAKE_U32_FROM_U8('t', 'h', 'u', 0)) pTime->u8WeekDay = 3;
1066	else if (uWeekDay == RT_MAKE_U32_FROM_U8('f', 'r', 'i', 0)) pTime->u8WeekDay = 4;
1067	else if (uWeekDay == RT_MAKE_U32_FROM_U8('s', 'a', 't', 0)) pTime->u8WeekDay = 5;
1068	else if (uWeekDay == RT_MAKE_U32_FROM_U8('s', 'u', 'n', 0)) pTime->u8WeekDay = 6;
1069	else
1070	return NULL;
1071	pszString += 3;
1072	while (RT_C_IS_ALPHA(*pszString))
1073	pszString++;
1074	if (*pszString == ',')
1075	pszString++;
1076	while (RT_C_IS_SPACE(*pszString))
1077	pszString++;
1078	if (!RT_C_IS_DIGIT(pszString[0]))
1079	return NULL;
1080	}
1081	else if (RT_C_IS_DIGIT(pszString[0]))
1082	pTime->u8WeekDay = UINT8_MAX;
1083	else
1084	return NULL;
1085
1086	/* Day of month.*/
1087	int rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8MonthDay);
1088	if (rc != VWRN_TRAILING_CHARS && rc != VINF_SUCCESS)
1089	return NULL;
1090	while (RT_C_IS_SPACE(*pszString))
1091	pszString++;
1092
1093	/* Month of the year. */
1094	if (pszString[0] == '\0' \|\| pszString[1] == '\0' \|\| pszString[2] == '\0')
1095	return NULL;
1096	uint32_t uMonth = RT_MAKE_U32_FROM_U8(RT_C_TO_LOWER(pszString[0]), RT_C_TO_LOWER(pszString[1]),
1097	RT_C_TO_LOWER(pszString[2]), 0);
1098	if ( uMonth == RT_MAKE_U32_FROM_U8('j', 'a', 'n', 0)) pTime->u8Month = 1;
1099	else if (uMonth == RT_MAKE_U32_FROM_U8('f', 'e', 'b', 0)) pTime->u8Month = 2;
1100	else if (uMonth == RT_MAKE_U32_FROM_U8('m', 'a', 'r', 0)) pTime->u8Month = 3;
1101	else if (uMonth == RT_MAKE_U32_FROM_U8('a', 'p', 'r', 0)) pTime->u8Month = 4;
1102	else if (uMonth == RT_MAKE_U32_FROM_U8('m', 'a', 'y', 0)) pTime->u8Month = 5;
1103	else if (uMonth == RT_MAKE_U32_FROM_U8('j', 'u', 'n', 0)) pTime->u8Month = 6;
1104	else if (uMonth == RT_MAKE_U32_FROM_U8('j', 'u', 'l', 0)) pTime->u8Month = 7;
1105	else if (uMonth == RT_MAKE_U32_FROM_U8('a', 'u', 'g', 0)) pTime->u8Month = 8;
1106	else if (uMonth == RT_MAKE_U32_FROM_U8('s', 'e', 'p', 0)) pTime->u8Month = 9;
1107	else if (uMonth == RT_MAKE_U32_FROM_U8('o', 'c', 't', 0)) pTime->u8Month = 10;
1108	else if (uMonth == RT_MAKE_U32_FROM_U8('n', 'o', 'v', 0)) pTime->u8Month = 11;
1109	else if (uMonth == RT_MAKE_U32_FROM_U8('d', 'e', 'c', 0)) pTime->u8Month = 12;
1110	else
1111	return NULL;
1112	pszString += 3;
1113	while (RT_C_IS_ALPHA(*pszString))
1114	pszString++;
1115	while (RT_C_IS_SPACE(*pszString))
1116	pszString++;
1117
1118	/* Year */
1119	const char * const pszStartYear = pszString;
1120	rc = RTStrToInt32Ex(pszString, (char **)&pszString, 10, &pTime->i32Year);
1121	if (rc != VWRN_TRAILING_CHARS)
1122	return NULL;
1123	if (pszString - pszStartYear >= 4 )
1124	{ /* likely */ }
1125	else if (pszString - pszStartYear == 3)
1126	pTime->i32Year += 1900;
1127	else if (pszString - pszStartYear == 2)
1128	pTime->i32Year += pTime->i32Year >= 50 ? 1900 : 2000;
1129	else
1130	return NULL;
1131
1132	bool const fLeapYear = rtTimeIsLeapYear(pTime->i32Year);
1133	if (fLeapYear)
1134	pTime->fFlags \|= RTTIME_FLAGS_LEAP_YEAR;
1135
1136	while (RT_C_IS_SPACE(*pszString))
1137	pszString++;
1138
1139
1140	/* Calculate year day. */
1141	unsigned const cDaysInMonth = fLeapYear
1142	? g_acDaysInMonthsLeap[pTime->u8Month - 1]
1143	: g_acDaysInMonths[pTime->u8Month - 1];
1144	if (pTime->u8MonthDay == 0 \|\| pTime->u8MonthDay > cDaysInMonth)
1145	return NULL;
1146
1147	pTime->u16YearDay = pTime->u8MonthDay - 1
1148	+ (fLeapYear
1149	? g_aiDayOfYearLeap[pTime->u8Month - 1]
1150	: g_aiDayOfYear[pTime->u8Month - 1]);
1151
1152	/*
1153	* The time part.
1154	*/
1155	/* Hour. */
1156	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8Hour);
1157	if (rc != VWRN_TRAILING_CHARS)
1158	return NULL;
1159	if (pTime->u8Hour > 23)
1160	return NULL;
1161	if (*pszString++ != ':')
1162	return NULL;
1163
1164	/* Minute. */
1165	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8Minute);
1166	if (rc != VWRN_TRAILING_CHARS)
1167	return NULL;
1168	if (pTime->u8Minute > 59)
1169	return NULL;
1170	if (*pszString++ != ':')
1171	return NULL;
1172
1173	/* Second. */
1174	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &pTime->u8Second);
1175	if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS && rc != VWRN_TRAILING_SPACES)
1176	return NULL;
1177	if (pTime->u8Second > 59)
1178	return NULL;
1179
1180	/* Non-standard fraction. Handy for testing, though. */
1181	if (*pszString == '.')
1182	{
1183	const char * const pszStart = ++pszString;
1184	rc = RTStrToUInt32Ex(pszString, (char **)&pszString, 10, &pTime->u32Nanosecond);
1185	if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS && rc != VWRN_TRAILING_SPACES)
1186	return NULL;
1187	if (pTime->u32Nanosecond >= 1000000000)
1188	return NULL;
1189	switch (pszString - pszStart)
1190	{
1191	case 1: pTime->u32Nanosecond *= 100000000; break;
1192	case 2: pTime->u32Nanosecond *= 10000000; break;
1193	case 3: pTime->u32Nanosecond *= 1000000; break;
1194	case 4: pTime->u32Nanosecond *= 100000; break;
1195	case 5: pTime->u32Nanosecond *= 10000; break;
1196	case 6: pTime->u32Nanosecond *= 1000; break;
1197	case 7: pTime->u32Nanosecond *= 100; break;
1198	case 8: pTime->u32Nanosecond *= 10; break;
1199	case 9: break;
1200	default:
1201	return NULL;
1202	}
1203	if (pTime->u32Nanosecond >= 1000000000)
1204	return NULL;
1205	}
1206	else
1207	pTime->u32Nanosecond = 0;
1208	while (RT_C_IS_SPACE(*pszString))
1209	pszString++;
1210
1211	/*
1212	* Time zone.
1213	*/
1214	if ( *pszString == '+'
1215	\|\| *pszString == '-')
1216	{
1217	if ( !RT_C_IS_DIGIT(pszString[1])
1218	\|\| !RT_C_IS_DIGIT(pszString[2]))
1219	return NULL;
1220	int8_t cUtcHours = (pszString[1] - '0') * 10 + (pszString[2] - '0');
1221	char chSign = *pszString;
1222	if (chSign == '-')
1223	cUtcHours = -cUtcHours;
1224	pszString += 3;
1225
1226	uint8_t cUtcMin = 0;
1227	if (RT_C_IS_DIGIT(pszString[0]))
1228	{
1229	rc = RTStrToUInt8Ex(pszString, (char **)&pszString, 10, &cUtcMin);
1230	if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_SPACES)
1231	return NULL;
1232	}
1233	else if (pszString && !RT_C_IS_BLANK(pszString))
1234	return NULL;
1235	if (cUtcHours >= 0)
1236	pTime->offUTC = cUtcHours * 60 + cUtcMin;
1237	else
1238	pTime->offUTC = cUtcHours * 60 - cUtcMin;
1239	if (RT_ABS(pTime->offUTC) > 840)
1240	return NULL;
1241
1242	/* -0000: GMT isn't necessarily the local time zone, so change flags from local to UTC. */
1243	if (pTime->offUTC == 0 && chSign == '-')
1244	{
1245	pTime->fFlags &= ~RTTIME_FLAGS_TYPE_MASK;
1246	pTime->fFlags \|= RTTIME_FLAGS_TYPE_UTC;
1247	}
1248	}
1249	else if (RT_C_IS_ALPHA(*pszString))
1250	{
1251	uint32_t uTimeZone = RT_MAKE_U32_FROM_U8(RT_C_TO_LOWER(pszString[0]), RT_C_TO_LOWER(pszString[1]),
1252	RT_C_TO_LOWER(pszString[2]), 0);
1253	if (uTimeZone == RT_MAKE_U32_FROM_U8('g', 'm', 't', 0))
1254	{
1255	pTime->fFlags &= ~RTTIME_FLAGS_TYPE_MASK;
1256	pTime->fFlags \|= RTTIME_FLAGS_TYPE_UTC;
1257	pTime->offUTC = 0;
1258	pszString += 3;
1259	}
1260	else if ((uint16_t)uTimeZone == RT_MAKE_U16('u', 't'))
1261	{
1262	pTime->fFlags &= ~RTTIME_FLAGS_TYPE_MASK;
1263	pTime->fFlags \|= RTTIME_FLAGS_TYPE_UTC;
1264	pTime->offUTC = 0;
1265	pszString += 2;
1266	}
1267	else
1268	{
1269	static const struct { uint32_t uTimeZone; int32_t offUtc; } s_aLegacyTimeZones[] =
1270	{
1271	{ RT_MAKE_U32_FROM_U8('e', 'd', 't', 0), -4*60 },
1272	{ RT_MAKE_U32_FROM_U8('e', 's', 't', 0), -5*60 },
1273	{ RT_MAKE_U32_FROM_U8('c', 'd', 't', 0), -5*60 },
1274	{ RT_MAKE_U32_FROM_U8('c', 's', 't', 0), -6*60 },
1275	{ RT_MAKE_U32_FROM_U8('m', 'd', 't', 0), -6*60 },
1276	{ RT_MAKE_U32_FROM_U8('m', 's', 't', 0), -7*60 },
1277	{ RT_MAKE_U32_FROM_U8('p', 'd', 't', 0), -7*60 },
1278	{ RT_MAKE_U32_FROM_U8('p', 's', 't', 0), -8*60 },
1279	};
1280	size_t i = RT_ELEMENTS(s_aLegacyTimeZones);
1281	while (i-- > 0)
1282	if (s_aLegacyTimeZones[i].uTimeZone == uTimeZone)
1283	{
1284	pTime->fFlags &= ~RTTIME_FLAGS_TYPE_MASK;
1285	pTime->fFlags \|= RTTIME_FLAGS_TYPE_LOCAL;
1286	pTime->offUTC = s_aLegacyTimeZones[i].offUtc;
1287	pszString += 3;
1288	break;
1289	}
1290	}
1291
1292	}
1293	/* else: No time zone given, local with offUTC = 0. */
1294
1295	/*
1296	* The rest of the string should be blanks.
1297	*/
1298	char ch;
1299	while ((ch = *pszString++) != '\0')
1300	if (!RT_C_IS_BLANK(ch))
1301	return NULL;
1302
1303	rtTimeNormalizeInternal(pTime);
1304	return pTime;
1305	}
1306	RT_EXPORT_SYMBOL(RTTimeFromRfc2822);
1307
1308
1309	/**
1310	* Adds one day to @a pTime.
1311	*
1312	* ASSUMES it is zulu time so DST can be ignored.
1313	*/
1314	static PRTTIME rtTimeAdd1Day(PRTTIME pTime)
1315	{
1316	Assert(!pTime->offUTC);
1317	rtTimeNormalizeInternal(pTime);
1318	pTime->u8MonthDay += 1;
1319	pTime->u16YearDay = 0;
1320	return rtTimeNormalizeInternal(pTime);
1321	}
1322
1323
1324	/**
1325	* Subtracts one day from @a pTime.
1326	*
1327	* ASSUMES it is zulu time so DST can be ignored.
1328	*/
1329	static PRTTIME rtTimeSub1Day(PRTTIME pTime)
1330	{
1331	Assert(!pTime->offUTC);
1332	rtTimeNormalizeInternal(pTime);
1333	if (pTime->u16YearDay > 1)
1334	{
1335	pTime->u16YearDay -= 1;
1336	pTime->u8Month = 0;
1337	pTime->u8MonthDay = 0;
1338	}
1339	else
1340	{
1341	pTime->i32Year -= 1;
1342	pTime->u16YearDay = rtTimeIsLeapYear(pTime->i32Year) ? 366 : 365;
1343	pTime->u8MonthDay = 31;
1344	pTime->u8Month = 12;
1345	pTime->fFlags &= ~(RTTIME_FLAGS_COMMON_YEAR \| RTTIME_FLAGS_LEAP_YEAR);
1346	}
1347	return rtTimeNormalizeInternal(pTime);
1348	}
1349
1350
1351	/**
1352	* Adds a signed number of minutes to @a pTime.
1353	*
1354	* ASSUMES it is zulu time so DST can be ignored.
1355	*
1356	* @param pTime The time structure to work on.
1357	* @param cAddend Number of minutes to add.
1358	* ASSUMES the value isn't all that high!
1359	*/
1360	static PRTTIME rtTimeAddMinutes(PRTTIME pTime, int32_t cAddend)
1361	{
1362	Assert(RT_ABS(cAddend) < 31 * 24 * 60);
1363
1364	/*
1365	* Work on minutes of the day.
1366	*/
1367	int32_t const cMinutesInDay = 24 * 60;
1368	int32_t iDayMinute = (unsigned)pTime->u8Hour * 60 + pTime->u8Minute;
1369	iDayMinute += cAddend;
1370
1371	while (iDayMinute >= cMinutesInDay)
1372	{
1373	rtTimeAdd1Day(pTime);
1374	iDayMinute -= cMinutesInDay;
1375	}
1376
1377	while (iDayMinute < 0)
1378	{
1379	rtTimeSub1Day(pTime);
1380	iDayMinute += cMinutesInDay;
1381	}
1382
1383	pTime->u8Hour = iDayMinute / 60;
1384	pTime->u8Minute = iDayMinute % 60;
1385
1386	return pTime;
1387	}
1388
1389
1390	/**
1391	* Converts @a pTime to zulu time (UTC) if needed.
1392	*
1393	* @returns pTime.
1394	* @param pTime What to convert (in/out).
1395	*/
1396	static PRTTIME rtTimeConvertToZulu(PRTTIME pTime)
1397	{
1398	RTTIME_ASSERT_NORMALIZED(pTime);
1399	if ((pTime->fFlags & RTTIME_FLAGS_TYPE_MASK) != RTTIME_FLAGS_TYPE_UTC)
1400	{
1401	int32_t offUTC = pTime->offUTC;
1402	pTime->offUTC = 0;
1403	pTime->fFlags &= ~RTTIME_FLAGS_TYPE_MASK;
1404	pTime->fFlags \|= RTTIME_FLAGS_TYPE_UTC;
1405	if (offUTC != 0)
1406	rtTimeAddMinutes(pTime, -offUTC);
1407	}
1408	return pTime;
1409	}
1410
1411
1412	RTDECL(PRTTIME) RTTimeConvertToZulu(PRTTIME pTime)
1413	{
1414	/*
1415	* Validate that we've got the minimum of stuff handy.
1416	*/
1417	AssertPtrReturn(pTime, NULL);
1418	AssertMsgReturn(!(pTime->fFlags & ~RTTIME_FLAGS_MASK), ("%#x\n", pTime->fFlags), NULL);
1419
1420	return rtTimeConvertToZulu(rtTimeNormalizeInternal(pTime));
1421	}
1422	RT_EXPORT_SYMBOL(RTTimeConvertToZulu);
1423
1424
1425	RTDECL(int) RTTimeCompare(PCRTTIME pLeft, PCRTTIME pRight)
1426	{
1427	#ifdef RT_STRICT
1428	if (pLeft)
1429	RTTIME_ASSERT_NORMALIZED(pLeft);
1430	if (pRight)
1431	RTTIME_ASSERT_NORMALIZED(pRight);
1432	#endif
1433
1434	int iRet;
1435	if (pLeft)
1436	{
1437	if (pRight)
1438	{
1439	/*
1440	* Only work with normalized zulu time.
1441	*/
1442	RTTIME TmpLeft;
1443	if ( pLeft->offUTC != 0
1444	\|\| pLeft->u16YearDay == 0
1445	\|\| pLeft->u16YearDay > 366
1446	\|\| pLeft->u8Hour >= 60
1447	\|\| pLeft->u8Minute >= 60
1448	\|\| pLeft->u8Second >= 60)
1449	{
1450	TmpLeft = *pLeft;
1451	pLeft = rtTimeConvertToZulu(rtTimeNormalizeInternal(&TmpLeft));
1452	}
1453
1454	RTTIME TmpRight;
1455	if ( pRight->offUTC != 0
1456	\|\| pRight->u16YearDay == 0
1457	\|\| pRight->u16YearDay > 366
1458	\|\| pRight->u8Hour >= 60
1459	\|\| pRight->u8Minute >= 60
1460	\|\| pRight->u8Second >= 60)
1461	{
1462	TmpRight = *pRight;
1463	pRight = rtTimeConvertToZulu(rtTimeNormalizeInternal(&TmpRight));
1464	}
1465
1466	/*
1467	* Do the comparison.
1468	*/
1469	if ( pLeft->i32Year != pRight->i32Year)
1470	iRet = pLeft->i32Year < pRight->i32Year ? -1 : 1;
1471	else if ( pLeft->u16YearDay != pRight->u16YearDay)
1472	iRet = pLeft->u16YearDay < pRight->u16YearDay ? -1 : 1;
1473	else if ( pLeft->u8Hour != pRight->u8Hour)
1474	iRet = pLeft->u8Hour < pRight->u8Hour ? -1 : 1;
1475	else if ( pLeft->u8Minute != pRight->u8Minute)
1476	iRet = pLeft->u8Minute < pRight->u8Minute ? -1 : 1;
1477	else if ( pLeft->u8Second != pRight->u8Second)
1478	iRet = pLeft->u8Second < pRight->u8Second ? -1 : 1;
1479	else if ( pLeft->u32Nanosecond != pRight->u32Nanosecond)
1480	iRet = pLeft->u32Nanosecond < pRight->u32Nanosecond ? -1 : 1;
1481	else
1482	iRet = 0;
1483	}
1484	else
1485	iRet = 1;
1486	}
1487	else
1488	iRet = pRight ? -1 : 0;
1489	return iRet;
1490	}
1491	RT_EXPORT_SYMBOL(RTTimeCompare);
1492

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source: vbox/trunk/src/VBox/Runtime/common/time/time.cpp@ 99844

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