FM / unicode

/usr/include/unicode

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alphaindex.h	27118	0644	edit dl rm
appendable.h	8694	0644	edit dl rm
basictz.h	9491	0644	edit dl rm
brkiter.h	28464	0644	edit dl rm
bytestream.h	11037	0644	edit dl rm
bytestrie.h	21266	0644	edit dl rm
bytestriebuilder.h	7248	0644	edit dl rm
calendar.h	108278	0644	edit dl rm
caniter.h	7611	0644	edit dl rm
casemap.h	25933	0644	edit dl rm
char16ptr.h	7393	0644	edit dl rm
chariter.h	24632	0644	edit dl rm
choicfmt.h	24482	0644	edit dl rm
coleitr.h	14094	0644	edit dl rm
coll.h	57581	0644	edit dl rm
compactdecimalformat.h	7047	0644	edit dl rm
curramt.h	3851	0644	edit dl rm
currpinf.h	7473	0644	edit dl rm
currunit.h	4094	0644	edit dl rm
datefmt.h	41641	0644	edit dl rm
dbbi.h	1223	0644	edit dl rm
dcfmtsym.h	20897	0644	edit dl rm
decimfmt.h	89278	0644	edit dl rm
docmain.h	7142	0644	edit dl rm
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dtintrv.h	3930	0644	edit dl rm
dtitvfmt.h	47634	0644	edit dl rm
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format.h	12802	0644	edit dl rm
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fpositer.h	3109	0644	edit dl rm
gender.h	3408	0644	edit dl rm
gregocal.h	32472	0644	edit dl rm
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icuplug.h	12166	0644	edit dl rm
idna.h	13000	0644	edit dl rm
listformatter.h	9493	0644	edit dl rm
localebuilder.h	11502	0644	edit dl rm
localematcher.h	25147	0644	edit dl rm
localpointer.h	19829	0644	edit dl rm
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locid.h	48821	0644	edit dl rm
measfmt.h	11603	0644	edit dl rm
measunit.h	97563	0644	edit dl rm
measure.h	4423	0644	edit dl rm
messagepattern.h	34521	0644	edit dl rm
msgfmt.h	45168	0644	edit dl rm
normalizer2.h	34851	0644	edit dl rm
normlzr.h	31682	0644	edit dl rm
nounit.h	2754	0644	edit dl rm
numberformatter.h	86276	0644	edit dl rm
numberrangeformatter.h	28617	0644	edit dl rm
numfmt.h	50950	0644	edit dl rm
numsys.h	7500	0644	edit dl rm
parseerr.h	3155	0644	edit dl rm
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platform.h	28751	0644	edit dl rm
plurfmt.h	25800	0644	edit dl rm
plurrule.h	18780	0644	edit dl rm
ptypes.h	3577	0644	edit dl rm
putil.h	6487	0644	edit dl rm
rbbi.h	27218	0644	edit dl rm
rbnf.h	49899	0644	edit dl rm
rbtz.h	15979	0644	edit dl rm
regex.h	86367	0644	edit dl rm
region.h	9404	0644	edit dl rm
reldatefmt.h	22801	0644	edit dl rm
rep.h	9599	0644	edit dl rm
resbund.h	18503	0644	edit dl rm
schriter.h	6475	0644	edit dl rm
scientificnumberformatter.h	6553	0644	edit dl rm
search.h	22757	0644	edit dl rm
selfmt.h	14643	0644	edit dl rm
simpleformatter.h	12888	0644	edit dl rm
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sortkey.h	11444	0644	edit dl rm
std_string.h	1076	0644	edit dl rm
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stringoptions.h	5926	0644	edit dl rm
stringpiece.h	10597	0644	edit dl rm
stringtriebuilder.h	15698	0644	edit dl rm
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tblcoll.h	37489	0644	edit dl rm
timezone.h	42005	0644	edit dl rm
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tzfmt.h	43916	0644	edit dl rm
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tztrans.h	6271	0644	edit dl rm
ubidi.h	91711	0644	edit dl rm
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ucal.h	58265	0644	edit dl rm
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ucat.h	5484	0644	edit dl rm
uchar.h	144630	0644	edit dl rm
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ucnv_err.h	21492	0644	edit dl rm
ucol.h	62939	0644	edit dl rm
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uconfig.h	12356	0644	edit dl rm
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udisplaycontext.h	6029	0644	edit dl rm
uenum.h	7970	0644	edit dl rm
ufieldpositer.h	4461	0644	edit dl rm
uformattable.h	11198	0644	edit dl rm
uformattedvalue.h	12413	0644	edit dl rm
ugender.h	2052	0644	edit dl rm
uidna.h	34169	0644	edit dl rm
uiter.h	23319	0644	edit dl rm
uldnames.h	10702	0644	edit dl rm
ulistformatter.h	11086	0644	edit dl rm
uloc.h	54432	0644	edit dl rm
ulocdata.h	11533	0644	edit dl rm
umachine.h	14884	0644	edit dl rm
umisc.h	1365	0644	edit dl rm
umsg.h	24812	0644	edit dl rm
umutablecptrie.h	8435	0644	edit dl rm
unifilt.h	4055	0644	edit dl rm
unifunct.h	4141	0644	edit dl rm
unimatch.h	6244	0644	edit dl rm
unirepl.h	3464	0644	edit dl rm
uniset.h	66459	0644	edit dl rm
unistr.h	174523	0644	edit dl rm
unorm.h	21015	0644	edit dl rm
unorm2.h	25254	0644	edit dl rm
unum.h	54743	0644	edit dl rm
unumberformatter.h	25824	0644	edit dl rm
unumsys.h	7387	0644	edit dl rm
uobject.h	10936	0644	edit dl rm
upluralrules.h	8013	0644	edit dl rm
uregex.h	73784	0644	edit dl rm
uregion.h	10073	0644	edit dl rm
ureldatefmt.h	17409	0644	edit dl rm
urename.h	134449	0644	edit dl rm
urep.h	5507	0644	edit dl rm
ures.h	37415	0644	edit dl rm
uscript.h	27867	0644	edit dl rm
usearch.h	39039	0644	edit dl rm
uset.h	40958	0644	edit dl rm
usetiter.h	9781	0644	edit dl rm
ushape.h	18432	0644	edit dl rm
uspoof.h	67480	0644	edit dl rm
usprep.h	8331	0644	edit dl rm
ustdio.h	39469	0644	edit dl rm
ustream.h	1934	0644	edit dl rm
ustring.h	74211	0644	edit dl rm
ustringtrie.h	3224	0644	edit dl rm
utext.h	59527	0644	edit dl rm
utf.h	8046	0644	edit dl rm
utf8.h	31700	0644	edit dl rm
utf16.h	23878	0644	edit dl rm
utf32.h	763	0644	edit dl rm
utf_old.h	46929	0644	edit dl rm
utmscale.h	14113	0644	edit dl rm
utrace.h	17706	0644	edit dl rm
utrans.h	26130	0644	edit dl rm
utypes.h	31481	0644	edit dl rm
uvernum.h	6832	0644	edit dl rm
uversion.h	6145	0644	edit dl rm
vtzone.h	20784	0644	edit dl rm

Edit: /usr/include/unicode/utmscale.h (14113B)

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2004 - 2008, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/

#ifndef UTMSCALE_H
#define UTMSCALE_H

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

/** 
 * \file
 * \brief C API: Universal Time Scale
 *
 * There are quite a few different conventions for binary datetime, depending on different
 * platforms and protocols. Some of these have severe drawbacks. For example, people using
 * Unix time (seconds since Jan 1, 1970) think that they are safe until near the year 2038.
 * But cases can and do arise where arithmetic manipulations causes serious problems. Consider
 * the computation of the average of two datetimes, for example: if one calculates them with
 * <code>averageTime = (time1 + time2)/2</code>, there will be overflow even with dates
 * around the present. Moreover, even if these problems don't occur, there is the issue of
 * conversion back and forth between different systems.
 *
 * <p>
 * Binary datetimes differ in a number of ways: the datatype, the unit,
 * and the epoch (origin). We'll refer to these as time scales. For example:
 *
 * <table border="1" cellspacing="0" cellpadding="4">
 *  <caption>Table 1: Binary Time Scales</caption>
 *  <tr>
 *    <th align="left">Source</th>
 *    <th align="left">Datatype</th>
 *    <th align="left">Unit</th>
 *    <th align="left">Epoch</th>
 *  </tr>
 *
 *  <tr>
 *    <td>UDTS_JAVA_TIME</td>
 *    <td>int64_t</td>
 *    <td>milliseconds</td>
 *    <td>Jan 1, 1970</td>
 *  </tr>
 *  <tr>
 *
 *    <td>UDTS_UNIX_TIME</td>
 *    <td>int32_t or int64_t</td>
 *    <td>seconds</td>
 *    <td>Jan 1, 1970</td>
 *  </tr>
 *  <tr>
 *    <td>UDTS_ICU4C_TIME</td>
 *
 *    <td>double</td>
 *    <td>milliseconds</td>
 *    <td>Jan 1, 1970</td>
 *  </tr>
 *  <tr>
 *    <td>UDTS_WINDOWS_FILE_TIME</td>
 *    <td>int64_t</td>
 *
 *    <td>ticks (100 nanoseconds)</td>
 *    <td>Jan 1, 1601</td>
 *  </tr>
 *  <tr>
 *    <td>UDTS_DOTNET_DATE_TIME</td>
 *    <td>int64_t</td>
 *    <td>ticks (100 nanoseconds)</td>
 *
 *    <td>Jan 1, 0001</td>
 *  </tr>
 *  <tr>
 *    <td>UDTS_MAC_OLD_TIME</td>
 *    <td>int32_t or int64_t</td>
 *    <td>seconds</td>
 *    <td>Jan 1, 1904</td>
 *
 *  </tr>
 *  <tr>
 *    <td>UDTS_MAC_TIME</td>
 *    <td>double</td>
 *    <td>seconds</td>
 *    <td>Jan 1, 2001</td>
 *  </tr>
 *
 *  <tr>
 *    <td>UDTS_EXCEL_TIME</td>
 *    <td>?</td>
 *    <td>days</td>
 *    <td>Dec 31, 1899</td>
 *  </tr>
 *  <tr>
 *
 *    <td>UDTS_DB2_TIME</td>
 *    <td>?</td>
 *    <td>days</td>
 *    <td>Dec 31, 1899</td>
 *  </tr>
 *
 *  <tr>
 *    <td>UDTS_UNIX_MICROSECONDS_TIME</td>
 *    <td>int64_t</td>
 *    <td>microseconds</td>
 *    <td>Jan 1, 1970</td>
 *  </tr>
 * </table>
 *
 * <p>
 * All of the epochs start at 00:00 am (the earliest possible time on the day in question),
 * and are assumed to be UTC.
 *
 * <p>
 * The ranges for different datatypes are given in the following table (all values in years).
 * The range of years includes the entire range expressible with positive and negative
 * values of the datatype. The range of years for double is the range that would be allowed
 * without losing precision to the corresponding unit.
 *
 * <table border="1" cellspacing="0" cellpadding="4">
 *  <tr>
 *    <th align="left">Units</th>
 *    <th align="left">int64_t</th>
 *    <th align="left">double</th>
 *    <th align="left">int32_t</th>
 *  </tr>
 *
 *  <tr>
 *    <td>1 sec</td>
 *    <td align="right">5.84542x10<sup>11</sup></td>
 *    <td align="right">285,420,920.94</td>
 *    <td align="right">136.10</td>
 *  </tr>
 *  <tr>
 *
 *    <td>1 millisecond</td>
 *    <td align="right">584,542,046.09</td>
 *    <td align="right">285,420.92</td>
 *    <td align="right">0.14</td>
 *  </tr>
 *  <tr>
 *    <td>1 microsecond</td>
 *
 *    <td align="right">584,542.05</td>
 *    <td align="right">285.42</td>
 *    <td align="right">0.00</td>
 *  </tr>
 *  <tr>
 *    <td>100 nanoseconds (tick)</td>
 *    <td align="right">58,454.20</td>
 *    <td align="right">28.54</td>
 *    <td align="right">0.00</td>
 *  </tr>
 *  <tr>
 *    <td>1 nanosecond</td>
 *    <td align="right">584.5420461</td>
 *    <td align="right">0.2854</td>
 *    <td align="right">0.00</td>
 *  </tr>
 * </table>
 *
 * <p>
 * These functions implement a universal time scale which can be used as a 'pivot',
 * and provide conversion functions to and from all other major time scales.
 * This datetimes to be converted to the pivot time, safely manipulated,
 * and converted back to any other datetime time scale.
 *
 *<p>
 * So what to use for this pivot? Java time has plenty of range, but cannot represent
 * .NET <code>System.DateTime</code> values without severe loss of precision. ICU4C time addresses this by using a
 * <code>double</code> that is otherwise equivalent to the Java time. However, there are disadvantages
 * with <code>doubles</code>. They provide for much more graceful degradation in arithmetic operations.
 * But they only have 53 bits of accuracy, which means that they will lose precision when
 * converting back and forth to ticks. What would really be nice would be a
 * <code>long double</code> (80 bits -- 64 bit mantissa), but that is not supported on most systems.
 *
 *<p>
 * The Unix extended time uses a structure with two components: time in seconds and a
 * fractional field (microseconds). However, this is clumsy, slow, and
 * prone to error (you always have to keep track of overflow and underflow in the
 * fractional field). <code>BigDecimal</code> would allow for arbitrary precision and arbitrary range,
 * but we do not want to use this as the normal type, because it is slow and does not
 * have a fixed size.
 *
 *<p>
 * Because of these issues, we ended up concluding that the .NET framework's
 * <code>System.DateTime</code> would be the best pivot. However, we use the full range
 * allowed by the datatype, allowing for datetimes back to 29,000 BC and up to 29,000 AD.
 * This time scale is very fine grained, does not lose precision, and covers a range that
 * will meet almost all requirements. It will not handle the range that Java times do,
 * but frankly, being able to handle dates before 29,000 BC or after 29,000 AD is of very limited interest.
 *
 */

/**
 * <code>UDateTimeScale</code> values are used to specify the time scale used for
 * conversion into or out if the universal time scale.
 *
 * @stable ICU 3.2
 */
typedef enum UDateTimeScale {
    /**
     * Used in the JDK. Data is a Java <code>long</code> (<code>int64_t</code>). Value
     * is milliseconds since January 1, 1970.
     *
     * @stable ICU 3.2
     */
    UDTS_JAVA_TIME = 0,

/**
     * Used on Unix systems. Data is <code>int32_t</code> or <code>int64_t</code>. Value
     * is seconds since January 1, 1970.
     *
     * @stable ICU 3.2
     */
    UDTS_UNIX_TIME,
    
    /**
     * Used in IUC4C. Data is a <code>double</code>. Value
     * is milliseconds since January 1, 1970.
     *
     * @stable ICU 3.2
     */
    UDTS_ICU4C_TIME,
    
    /**
     * Used in Windows for file times. Data is an <code>int64_t</code>. Value
     * is ticks (1 tick == 100 nanoseconds) since January 1, 1601.
     *
     * @stable ICU 3.2
     */
    UDTS_WINDOWS_FILE_TIME,
    
    /**
     * Used in the .NET framework's <code>System.DateTime</code> structure. Data is an <code>int64_t</code>. Value
     * is ticks (1 tick == 100 nanoseconds) since January 1, 0001.
     *
     * @stable ICU 3.2
     */
    UDTS_DOTNET_DATE_TIME,
    
    /**
     * Used in older Macintosh systems. Data is <code>int32_t</code> or <code>int64_t</code>. Value
     * is seconds since January 1, 1904.
     *
     * @stable ICU 3.2
     */
    UDTS_MAC_OLD_TIME,
    
    /**
     * Used in newer Macintosh systems. Data is a <code>double</code>. Value
     * is seconds since January 1, 2001.
     *
     * @stable ICU 3.2
     */
    UDTS_MAC_TIME,
    
    /**
     * Used in Excel. Data is an <code>?unknown?</code>. Value
     * is days since December 31, 1899.
     *
     * @stable ICU 3.2
     */
    UDTS_EXCEL_TIME,
    
    /**
     * Used in DB2. Data is an <code>?unknown?</code>. Value
     * is days since December 31, 1899.
     *
     * @stable ICU 3.2
     */
    UDTS_DB2_TIME,

/**
     * Data is a <code>long</code>. Value is microseconds since January 1, 1970.
     * Similar to Unix time (linear value from 1970) and struct timeval
     * (microseconds resolution).
     *
     * @stable ICU 3.8
     */
    UDTS_UNIX_MICROSECONDS_TIME,

#ifndef U_HIDE_DEPRECATED_API
    /**
     * The first unused time scale value. The limit of this enum
     * @deprecated ICU 59 The numeric value may change over time, see ICU ticket #12420.
     */
    UDTS_MAX_SCALE
#endif  /* U_HIDE_DEPRECATED_API */

} UDateTimeScale;

/**
 * <code>UTimeScaleValue</code> values are used to specify the time scale values
 * to <code>utmscale_getTimeScaleValue</code>.
 *
 * @see utmscale_getTimeScaleValue
 *
 * @stable ICU 3.2
 */
typedef enum UTimeScaleValue {
    /**
     * The constant used to select the units vale
     * for a time scale.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @stable ICU 3.2
     */
    UTSV_UNITS_VALUE = 0,

/**
     * The constant used to select the epoch offset value
     * for a time scale.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @stable ICU 3.2
     */
    UTSV_EPOCH_OFFSET_VALUE=1,

/**
     * The constant used to select the minimum from value
     * for a time scale.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @stable ICU 3.2
     */
    UTSV_FROM_MIN_VALUE=2,

/**
     * The constant used to select the maximum from value
     * for a time scale.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @stable ICU 3.2
     */
    UTSV_FROM_MAX_VALUE=3,

/**
     * The constant used to select the minimum to value
     * for a time scale.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @stable ICU 3.2
     */
    UTSV_TO_MIN_VALUE=4,

/**
     * The constant used to select the maximum to value
     * for a time scale.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @stable ICU 3.2
     */
    UTSV_TO_MAX_VALUE=5,

#ifndef U_HIDE_INTERNAL_API
    /**
     * The constant used to select the epoch plus one value
     * for a time scale.
     * 
     * NOTE: This is an internal value. DO NOT USE IT. May not
     * actually be equal to the epoch offset value plus one.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @internal ICU 3.2
     */
    UTSV_EPOCH_OFFSET_PLUS_1_VALUE=6,

/**
     * The constant used to select the epoch plus one value
     * for a time scale.
     * 
     * NOTE: This is an internal value. DO NOT USE IT. May not
     * actually be equal to the epoch offset value plus one.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @internal ICU 3.2
     */
    UTSV_EPOCH_OFFSET_MINUS_1_VALUE=7,

/**
     * The constant used to select the units round value
     * for a time scale.
     * 
     * NOTE: This is an internal value. DO NOT USE IT.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @internal ICU 3.2
     */
    UTSV_UNITS_ROUND_VALUE=8,

/**
     * The constant used to select the minimum safe rounding value
     * for a time scale.
     * 
     * NOTE: This is an internal value. DO NOT USE IT.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @internal ICU 3.2
     */
    UTSV_MIN_ROUND_VALUE=9,

/**
     * The constant used to select the maximum safe rounding value
     * for a time scale.
     * 
     * NOTE: This is an internal value. DO NOT USE IT.
     * 
     * @see utmscale_getTimeScaleValue
     *
     * @internal ICU 3.2
     */
    UTSV_MAX_ROUND_VALUE=10,

#endif /* U_HIDE_INTERNAL_API */

#ifndef U_HIDE_DEPRECATED_API
    /**
     * The number of time scale values, in other words limit of this enum.
     * 
     * @see utmscale_getTimeScaleValue
     * @deprecated ICU 59 The numeric value may change over time, see ICU ticket #12420.
     */
    UTSV_MAX_SCALE_VALUE=11
#endif  /* U_HIDE_DEPRECATED_API */

} UTimeScaleValue;

/**
 * Get a value associated with a particular time scale.
 * 
 * @param timeScale The time scale
 * @param value A constant representing the value to get
 * @param status The status code. Set to <code>U_ILLEGAL_ARGUMENT_ERROR</code> if arguments are invalid.
 * @return - the value.
 * 
 * @stable ICU 3.2
 */
U_STABLE int64_t U_EXPORT2
    utmscale_getTimeScaleValue(UDateTimeScale timeScale, UTimeScaleValue value, UErrorCode *status);

/* Conversion to 'universal time scale' */

/**
 * Convert a <code>int64_t</code> datetime from the given time scale to the universal time scale.
 *
 * @param otherTime The <code>int64_t</code> datetime
 * @param timeScale The time scale to convert from
 * @param status The status code. Set to <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the conversion is out of range.
 * 
 * @return The datetime converted to the universal time scale
 *
 * @stable ICU 3.2
 */
U_STABLE int64_t U_EXPORT2
    utmscale_fromInt64(int64_t otherTime, UDateTimeScale timeScale, UErrorCode *status);

/* Conversion from 'universal time scale' */

/**
 * Convert a datetime from the universal time scale to a <code>int64_t</code> in the given time scale.
 *
 * @param universalTime The datetime in the universal time scale
 * @param timeScale The time scale to convert to
 * @param status The status code. Set to <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the conversion is out of range.
 * 
 * @return The datetime converted to the given time scale
 *
 * @stable ICU 3.2
 */
U_STABLE int64_t U_EXPORT2
    utmscale_toInt64(int64_t universalTime, UDateTimeScale timeScale, UErrorCode *status);

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif

cmd: