1f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/* 2f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)******************************************************************************* 3f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* Copyright (C) 2004 - 2008, International Business Machines Corporation and 4f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* others. All Rights Reserved. 5f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)******************************************************************************* 6f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)*/ 7f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 8f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#ifndef UTMSCALE_H 9f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#define UTMSCALE_H 10f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 11f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#include "unicode/utypes.h" 12f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 13f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#if !UCONFIG_NO_FORMATTING 14f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 15f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 16f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * \file 17f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * \brief C API: Universal Time Scale 18f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 19f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * There are quite a few different conventions for binary datetime, depending on different 20f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * platforms and protocols. Some of these have severe drawbacks. For example, people using 21f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Unix time (seconds since Jan 1, 1970) think that they are safe until near the year 2038. 22f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * But cases can and do arise where arithmetic manipulations causes serious problems. Consider 23f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * the computation of the average of two datetimes, for example: if one calculates them with 24f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <code>averageTime = (time1 + time2)/2</code>, there will be overflow even with dates 25f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * around the present. Moreover, even if these problems don't occur, there is the issue of 26f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * conversion back and forth between different systems. 27f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 28f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <p> 29f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Binary datetimes differ in a number of ways: the datatype, the unit, 30f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * and the epoch (origin). We'll refer to these as time scales. For example: 31f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 32f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <table border="1" cellspacing="0" cellpadding="4"> 33f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <caption>Table 1: Binary Time Scales</caption> 34f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 35f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <th align="left">Source</th> 36f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <th align="left">Datatype</th> 37f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <th align="left">Unit</th> 38f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <th align="left">Epoch</th> 39f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 40f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 41f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 42f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_JAVA_TIME</td> 43f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>int64_t</td> 44f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>milliseconds</td> 45f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Jan 1, 1970</td> 46f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 47f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 48f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 49f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_UNIX_TIME</td> 50f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>int32_t or int64_t</td> 51f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>seconds</td> 52f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Jan 1, 1970</td> 53f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 54f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 55f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_ICU4C_TIME</td> 56f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 57f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>double</td> 58f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>milliseconds</td> 59f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Jan 1, 1970</td> 60f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 61f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 62f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_WINDOWS_FILE_TIME</td> 63f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>int64_t</td> 64f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 65f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>ticks (100 nanoseconds)</td> 66f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Jan 1, 1601</td> 67f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 68f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 69f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_DOTNET_DATE_TIME</td> 70f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>int64_t</td> 71f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>ticks (100 nanoseconds)</td> 72f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 73f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Jan 1, 0001</td> 74f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 75f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 76f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_MAC_OLD_TIME</td> 77f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>int32_t or int64_t</td> 78f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>seconds</td> 79f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Jan 1, 1904</td> 80f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 81f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 82f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 83f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_MAC_TIME</td> 84f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>double</td> 85f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>seconds</td> 86f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Jan 1, 2001</td> 87f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 88f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 89f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 90f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_EXCEL_TIME</td> 91f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>?</td> 92f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>days</td> 93f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Dec 31, 1899</td> 94f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 95f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 96f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 97f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_DB2_TIME</td> 98f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>?</td> 99f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>days</td> 100f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Dec 31, 1899</td> 101f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 102f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 103f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 104f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>UDTS_UNIX_MICROSECONDS_TIME</td> 105f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>int64_t</td> 106f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>microseconds</td> 107f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>Jan 1, 1970</td> 108f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 109f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </table> 110f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 111f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <p> 112f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * All of the epochs start at 00:00 am (the earliest possible time on the day in question), 113f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * and are assumed to be UTC. 114f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 115f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <p> 116f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The ranges for different datatypes are given in the following table (all values in years). 117f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The range of years includes the entire range expressible with positive and negative 118f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * values of the datatype. The range of years for double is the range that would be allowed 119f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * without losing precision to the corresponding unit. 120f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 121f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <table border="1" cellspacing="0" cellpadding="4"> 122f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 123f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <th align="left">Units</th> 124f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <th align="left">int64_t</th> 125f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <th align="left">double</th> 126f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <th align="left">int32_t</th> 127f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 128f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 129f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 130f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>1 sec</td> 131f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">5.84542x10<sup>11</sup></td> 132f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">285,420,920.94</td> 133f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">136.10</td> 134f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 135f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 136f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 137f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>1 millisecond</td> 138f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">584,542,046.09</td> 139f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">285,420.92</td> 140f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">0.14</td> 141f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 142f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 143f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>1 microsecond</td> 144f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 145f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">584,542.05</td> 146f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">285.42</td> 147f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">0.00</td> 148f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 149f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 150f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>100 nanoseconds (tick)</td> 151f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">58,454.20</td> 152f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">28.54</td> 153f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">0.00</td> 154f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 155f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <tr> 156f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td>1 nanosecond</td> 157f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">584.5420461</td> 158f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">0.2854</td> 159f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <td align="right">0.00</td> 160f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </tr> 161f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * </table> 162f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 163f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <p> 164f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * These functions implement a universal time scale which can be used as a 'pivot', 165f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * and provide conversion functions to and from all other major time scales. 166f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * This datetimes to be converted to the pivot time, safely manipulated, 167f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * and converted back to any other datetime time scale. 168f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 169f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) *<p> 170f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * So what to use for this pivot? Java time has plenty of range, but cannot represent 171f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * .NET <code>System.DateTime</code> values without severe loss of precision. ICU4C time addresses this by using a 172f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <code>double</code> that is otherwise equivalent to the Java time. However, there are disadvantages 173f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * with <code>doubles</code>. They provide for much more graceful degradation in arithmetic operations. 174f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * But they only have 53 bits of accuracy, which means that they will lose precision when 175f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * converting back and forth to ticks. What would really be nice would be a 176f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <code>long double</code> (80 bits -- 64 bit mantissa), but that is not supported on most systems. 177f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 178f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) *<p> 179f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The Unix extended time uses a structure with two components: time in seconds and a 180f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * fractional field (microseconds). However, this is clumsy, slow, and 181f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * prone to error (you always have to keep track of overflow and underflow in the 182f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * fractional field). <code>BigDecimal</code> would allow for arbitrary precision and arbitrary range, 183f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * but we do not want to use this as the normal type, because it is slow and does not 184f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * have a fixed size. 185f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 186f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) *<p> 187f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Because of these issues, we ended up concluding that the .NET framework's 188f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <code>System.DateTime</code> would be the best pivot. However, we use the full range 189f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * allowed by the datatype, allowing for datetimes back to 29,000 BC and up to 29,000 AD. 190f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * This time scale is very fine grained, does not lose precision, and covers a range that 191f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * will meet almost all requirements. It will not handle the range that Java times do, 192f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * but frankly, being able to handle dates before 29,000 BC or after 29,000 AD is of very limited interest. 193f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 194f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 195f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 196f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 197f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <code>UDateTimeScale</code> values are used to specify the time scale used for 198f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * conversion into or out if the universal time scale. 199f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 200f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 201f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 202f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)typedef enum UDateTimeScale { 203f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 204f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used in the JDK. Data is a Java <code>long</code> (<code>int64_t</code>). Value 205f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is milliseconds since January 1, 1970. 206f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 207f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 208f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 209f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_JAVA_TIME = 0, 210f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 211f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 212f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used on Unix systems. Data is <code>int32_t</code> or <code>int64_t</code>. Value 213f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is seconds since January 1, 1970. 214f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 215f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 216f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 217f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_UNIX_TIME, 218f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 219f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 220f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used in IUC4C. Data is a <code>double</code>. Value 221f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is milliseconds since January 1, 1970. 222f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 223f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 224f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 225f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_ICU4C_TIME, 226f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 227f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 228f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used in Windows for file times. Data is an <code>int64_t</code>. Value 229f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is ticks (1 tick == 100 nanoseconds) since January 1, 1601. 230f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 231f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 232f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 233f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_WINDOWS_FILE_TIME, 234f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 235f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 236f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used in the .NET framework's <code>System.DateTime</code> structure. Data is an <code>int64_t</code>. Value 237f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is ticks (1 tick == 100 nanoseconds) since January 1, 0001. 238f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 239f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 240f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 241f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_DOTNET_DATE_TIME, 242f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 243f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 244f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used in older Macintosh systems. Data is <code>int32_t</code> or <code>int64_t</code>. Value 245f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is seconds since January 1, 1904. 246f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 247f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 248f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 249f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_MAC_OLD_TIME, 250f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 251f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 252f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used in newer Macintosh systems. Data is a <code>double</code>. Value 253f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is seconds since January 1, 2001. 254f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 255f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 256f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 257f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_MAC_TIME, 258f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 259f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 260f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used in Excel. Data is an <code>?unknown?</code>. Value 261f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is days since December 31, 1899. 262f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 263f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 264f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 265f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_EXCEL_TIME, 266f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 267f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 268f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Used in DB2. Data is an <code>?unknown?</code>. Value 269f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * is days since December 31, 1899. 270f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 271f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 272f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 273f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_DB2_TIME, 274f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 275f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 276f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Data is a <code>long</code>. Value is microseconds since January 1, 1970. 277f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Similar to Unix time (linear value from 1970) and struct timeval 278f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * (microseconds resolution). 279f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 280f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.8 281f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 282f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_UNIX_MICROSECONDS_TIME, 283f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 284f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 285f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The first unused time scale value. The limit of this enum 286f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 287f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UDTS_MAX_SCALE 288f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)} UDateTimeScale; 289f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 290f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 291f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * <code>UTimeScaleValue</code> values are used to specify the time scale values 292f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * to <code>utmscale_getTimeScaleValue</code>. 293f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 294f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 295f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 296f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 297f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 298f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)typedef enum UTimeScaleValue { 299f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 300f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the units vale 301f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 302f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 303f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 304f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 305f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 306f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 307f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_UNITS_VALUE = 0, 308f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 309f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 310f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the epoch offset value 311f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 312f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 313f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 314f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 315f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 316f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 317f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_EPOCH_OFFSET_VALUE=1, 318f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 319f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 320f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the minimum from value 321f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 322f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 323f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 324f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 325f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 326f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 327f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_FROM_MIN_VALUE=2, 328f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 329f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 330f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the maximum from value 331f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 332f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 333f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 334f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 335f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 336f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 337f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_FROM_MAX_VALUE=3, 338f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 339f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 340f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the minimum to value 341f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 342f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 343f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 344f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 345f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 346f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 347f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_TO_MIN_VALUE=4, 348f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 349f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 350f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the maximum to value 351f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 352f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 353f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 354f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 355f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 356f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 357f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_TO_MAX_VALUE=5, 358f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 359f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#ifndef U_HIDE_INTERNAL_API 360f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 361f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the epoch plus one value 362f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 363f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 364f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * NOTE: This is an internal value. DO NOT USE IT. May not 365f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * actually be equal to the epoch offset value plus one. 366f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 367f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 368f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 369f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal ICU 3.2 370f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 371f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_EPOCH_OFFSET_PLUS_1_VALUE=6, 372f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 373f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 374f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the epoch plus one value 375f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 376f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 377f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * NOTE: This is an internal value. DO NOT USE IT. May not 378f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * actually be equal to the epoch offset value plus one. 379f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 380f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 381f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 382f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal ICU 3.2 383f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 384f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_EPOCH_OFFSET_MINUS_1_VALUE=7, 385f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 386f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 387f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the units round value 388f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 389f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 390f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * NOTE: This is an internal value. DO NOT USE IT. 391f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 392f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 393f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 394f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal ICU 3.2 395f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 396f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_UNITS_ROUND_VALUE=8, 397f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 398f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 399f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the minimum safe rounding value 400f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 401f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 402f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * NOTE: This is an internal value. DO NOT USE IT. 403f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 404f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 405f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 406f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal ICU 3.2 407f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 408f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_MIN_ROUND_VALUE=9, 409f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 410f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 411f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The constant used to select the maximum safe rounding value 412f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * for a time scale. 413f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 414f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * NOTE: This is an internal value. DO NOT USE IT. 415f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 416f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 417f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 418f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal ICU 3.2 419f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 420f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_MAX_ROUND_VALUE=10, 421f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 422f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#endif /* U_HIDE_INTERNAL_API */ 423f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 424f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /** 425f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The number of time scale values, in other words limit of this enum. 426f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 427f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @see utmscale_getTimeScaleValue 428f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 429f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) UTSV_MAX_SCALE_VALUE=11 430f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 431f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)} UTimeScaleValue; 432f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 433f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 434f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Get a value associated with a particular time scale. 435f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 436f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param timeScale The time scale 437f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param value A constant representing the value to get 438f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param status The status code. Set to <code>U_ILLEGAL_ARGUMENT_ERROR</code> if arguments are invalid. 439f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return - the value. 440f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 441f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 442f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 443f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_STABLE int64_t U_EXPORT2 444f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) utmscale_getTimeScaleValue(UDateTimeScale timeScale, UTimeScaleValue value, UErrorCode *status); 445f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 446f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/* Conversion to 'universal time scale' */ 447f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 448f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 449f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Convert a <code>int64_t</code> datetime from the given time scale to the universal time scale. 450f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 451f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param otherTime The <code>int64_t</code> datetime 452f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param timeScale The time scale to convert from 453f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param status The status code. Set to <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the conversion is out of range. 454f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 455f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return The datetime converted to the universal time scale 456f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 457f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 458f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 459f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_STABLE int64_t U_EXPORT2 460f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) utmscale_fromInt64(int64_t otherTime, UDateTimeScale timeScale, UErrorCode *status); 461f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 462f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/* Conversion from 'universal time scale' */ 463f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 464f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 465f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Convert a datetime from the universal time scale to a <code>int64_t</code> in the given time scale. 466f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 467f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param universalTime The datetime in the universal time scale 468f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param timeScale The time scale to convert to 469f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param status The status code. Set to <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the conversion is out of range. 470f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 471f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return The datetime converted to the given time scale 472f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 473f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @stable ICU 3.2 474f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 475f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_STABLE int64_t U_EXPORT2 476f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) utmscale_toInt64(int64_t universalTime, UDateTimeScale timeScale, UErrorCode *status); 477f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 478f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#endif /* #if !UCONFIG_NO_FORMATTING */ 479f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 480f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#endif 481f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 482