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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *******************************************************************************
5 * Copyright (C) 2004-2012, International Business Machines Corporation and
6 * others. All Rights Reserved.
7 *******************************************************************************
8 */
9 
10 #include "unicode/utypes.h"
11 
12 #if !UCONFIG_NO_FORMATTING
13 
14 #include "unicode/utmscale.h"
15 
16 #define ticks        INT64_C(1)
17 #define microseconds (ticks * 10)
18 #define milliseconds (microseconds * 1000)
19 #define seconds      (milliseconds * 1000)
20 #define minutes      (seconds * 60)
21 #define hours        (minutes * 60)
22 #define days         (hours * 24)
23 
24 /* Constants generated by ICU4J com.ibm.icu.dev.tool.timescale.GenerateCTimeScaleData. */
25 static const int64_t timeScaleTable[UDTS_MAX_SCALE][UTSV_MAX_SCALE_VALUE] = {
26   /*    units             epochOffset                     fromMin                        fromMax                            toMin                        toMax                    epochOffsetP1                epochOffsetM1              unitsRound                    minRound                     maxRound          */
27     {milliseconds, INT64_C(62135596800000),     INT64_C(-984472800485477),     INT64_C(860201606885477),     INT64_C(-9223372036854774999), INT64_C(9223372036854774999), INT64_C(62135596800001),     INT64_C(62135596799999),     INT64_C(5000),         INT64_C(-9223372036854770808), INT64_C(9223372036854770807)},
28     {seconds,      INT64_C(62135596800),        INT64_C(-984472800485),        INT64_C(860201606885),        U_INT64_MIN,                   U_INT64_MAX,                  INT64_C(62135596801),        INT64_C(62135596799),        INT64_C(5000000),      INT64_C(-9223372036849775808), INT64_C(9223372036849775807)},
29     {milliseconds, INT64_C(62135596800000),     INT64_C(-984472800485477),     INT64_C(860201606885477),     INT64_C(-9223372036854774999), INT64_C(9223372036854774999), INT64_C(62135596800001),     INT64_C(62135596799999),     INT64_C(5000),         INT64_C(-9223372036854770808), INT64_C(9223372036854770807)},
30     {ticks,        INT64_C(504911232000000000), U_INT64_MIN,                   INT64_C(8718460804854775807), INT64_C(-8718460804854775808), U_INT64_MAX,                  INT64_C(504911232000000000), INT64_C(504911232000000000), INT64_C(0),            U_INT64_MIN,                   U_INT64_MAX},
31     {ticks,        INT64_C(0),                  U_INT64_MIN,                   U_INT64_MAX,                  U_INT64_MIN,                   U_INT64_MAX,                  INT64_C(0),                  INT64_C(0),                  INT64_C(0),            U_INT64_MIN,                   U_INT64_MAX},
32     {seconds,      INT64_C(60052752000),        INT64_C(-982389955685),        INT64_C(862284451685),        U_INT64_MIN,                   U_INT64_MAX,                  INT64_C(60052752001),        INT64_C(60052751999),        INT64_C(5000000),      INT64_C(-9223372036849775808), INT64_C(9223372036849775807)},
33     {seconds,      INT64_C(63113904000),        INT64_C(-985451107685),        INT64_C(859223299685),        U_INT64_MIN,                   U_INT64_MAX,                  INT64_C(63113904001),        INT64_C(63113903999),        INT64_C(5000000),      INT64_C(-9223372036849775808), INT64_C(9223372036849775807)},
34     {days,         INT64_C(693594),             INT64_C(-11368793),            INT64_C(9981605),             U_INT64_MIN,                   U_INT64_MAX,                  INT64_C(693595),             INT64_C(693593),             INT64_C(432000000000), INT64_C(-9223371604854775808), INT64_C(9223371604854775807)},
35     {days,         INT64_C(693594),             INT64_C(-11368793),            INT64_C(9981605),             U_INT64_MIN,                   U_INT64_MAX,                  INT64_C(693595),             INT64_C(693593),             INT64_C(432000000000), INT64_C(-9223371604854775808), INT64_C(9223371604854775807)},
36     {microseconds, INT64_C(62135596800000000),  INT64_C(-984472800485477580),  INT64_C(860201606885477580),  INT64_C(-9223372036854775804), INT64_C(9223372036854775804), INT64_C(62135596800000001),  INT64_C(62135596799999999),  INT64_C(5),            INT64_C(-9223372036854775803), INT64_C(9223372036854775802)},
37 };
38 
39 U_CAPI int64_t U_EXPORT2
utmscale_getTimeScaleValue(UDateTimeScale timeScale,UTimeScaleValue value,UErrorCode * status)40 utmscale_getTimeScaleValue(UDateTimeScale timeScale, UTimeScaleValue value, UErrorCode *status)
41 {
42     if (status == NULL || U_FAILURE(*status)) {
43         return 0;
44     }
45 
46     if (timeScale < UDTS_JAVA_TIME || UDTS_MAX_SCALE <= timeScale
47         || value < UTSV_UNITS_VALUE || UTSV_MAX_SCALE_VALUE <= value)
48     {
49         *status = U_ILLEGAL_ARGUMENT_ERROR;
50         return 0;
51     }
52 
53     return timeScaleTable[timeScale][value];
54 }
55 
56 U_CAPI int64_t U_EXPORT2
utmscale_fromInt64(int64_t otherTime,UDateTimeScale timeScale,UErrorCode * status)57 utmscale_fromInt64(int64_t otherTime, UDateTimeScale timeScale, UErrorCode *status)
58 {
59     const int64_t *data;
60 
61     if (status == NULL || U_FAILURE(*status)) {
62         return 0;
63     }
64 
65     if ((int32_t)timeScale < 0 || timeScale >= UDTS_MAX_SCALE) {
66         *status = U_ILLEGAL_ARGUMENT_ERROR;
67         return 0;
68     }
69 
70     data = (const int64_t *)(&timeScaleTable[timeScale]);
71 
72     if (otherTime < data[UTSV_FROM_MIN_VALUE] || otherTime > data[UTSV_FROM_MAX_VALUE]) {
73         *status = U_ILLEGAL_ARGUMENT_ERROR;
74         return 0;
75     }
76 
77     return (otherTime + data[UTSV_EPOCH_OFFSET_VALUE]) * data[UTSV_UNITS_VALUE];
78 }
79 
80 U_CAPI int64_t U_EXPORT2
utmscale_toInt64(int64_t universalTime,UDateTimeScale timeScale,UErrorCode * status)81 utmscale_toInt64(int64_t universalTime, UDateTimeScale timeScale, UErrorCode *status)
82 {
83     const int64_t *data;
84 
85     if (status == NULL || U_FAILURE(*status)) {
86         return 0;
87     }
88 
89     if ((int32_t)timeScale < 0 || timeScale >= UDTS_MAX_SCALE) {
90         *status = U_ILLEGAL_ARGUMENT_ERROR;
91         return 0;
92     }
93 
94     data = (const int64_t *)(&timeScaleTable[timeScale]);
95 
96     if (universalTime < data[UTSV_TO_MIN_VALUE] || universalTime > data[UTSV_TO_MAX_VALUE]) {
97         *status = U_ILLEGAL_ARGUMENT_ERROR;
98         return 0;
99     }
100 
101     if (universalTime < 0) {
102         if (universalTime < data[UTSV_MIN_ROUND_VALUE]) {
103             return (universalTime + data[UTSV_UNITS_ROUND_VALUE]) / data[UTSV_UNITS_VALUE] - data[UTSV_EPOCH_OFFSET_PLUS_1_VALUE];
104         }
105 
106         return (universalTime - data[UTSV_UNITS_ROUND_VALUE]) / data[UTSV_UNITS_VALUE] - data[UTSV_EPOCH_OFFSET_VALUE];
107     }
108 
109     if (universalTime > data[UTSV_MAX_ROUND_VALUE]) {
110         return (universalTime - data[UTSV_UNITS_ROUND_VALUE]) / data[UTSV_UNITS_VALUE] - data[UTSV_EPOCH_OFFSET_MINUS_1_VALUE];
111     }
112 
113     return (universalTime + data[UTSV_UNITS_ROUND_VALUE]) / data[UTSV_UNITS_VALUE] - data[UTSV_EPOCH_OFFSET_VALUE];
114 }
115 
116 #endif /* #if !UCONFIG_NO_FORMATTING */
117