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  • src/libcfa/time

    r82df430 r6ecc079  
    11//
    2 // Cforall Version 1.0.0 Copyright (C) 2018 University of Waterloo
     2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
    33//
    44// The contents of this file are covered under the licence agreement in the
    55// file "LICENCE" distributed with Cforall.
    66//
    7 // time --
     7// calendar --
    88//
    99// Author           : Peter A. Buhr
    1010// Created On       : Wed Mar 14 23:18:57 2018
    1111// Last Modified By : Peter A. Buhr
    12 // Last Modified On : Sat Apr 14 17:48:23 2018
    13 // Update Count     : 636
     12// Last Modified On : Thu Mar 22 17:11:19 2018
     13// Update Count     : 495
    1414//
    1515
    … …  
    1919// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0355r5.html#refcc
    2020
    21 #include <time.h>                                                                               // timespec
     21#include <time.h>
    2222extern "C" {
    23 #include <sys/time.h>                                                                   // timeval
     23#include <sys/time.h>
     24int snprintf( char * buf, size_t size, const char * fmt, ... );
    2425}
    25 #include <time_t.h>                                                                             // Duration/Time types
    26 
    27 enum { TIMEGRAN = 1_000_000_000LL };                                    // nanosecond granularity, except for timeval
     26#include <fstream>
     27
     28enum {
     29        CLOCKGRAN = 15_000_000L,                                                        // ALWAYS in nanoseconds, MUST BE less than 1 second
     30        TIMEGRAN = 1_000_000_000L                                                       // nanosecond granularity, except for timeval
     31};
     32
     33
     34#if defined( REALTIME_POSIX )
     35#define tv_XSEC tv_nsec
     36#else
     37#define tv_XSEC tv_usec
     38#endif
     39
     40
     41#if defined( __linux__ )
     42// fake a few things
     43#define CLOCK_REALTIME  0                                                               // real (clock on the wall) time
     44#endif
     45
     46// conversions for existing time types
     47static inline void ?{}( timeval & t ) {}
     48static inline void ?{}( timeval & t, time_t sec ) { t.tv_sec = sec; t.tv_usec = 0; }
     49static inline void ?{}( timeval & t, time_t sec, suseconds_t usec ) { t.tv_sec = sec; t.tv_usec = usec; }
     50
     51static inline void ?{}( timespec & t ) {}
     52static inline void ?{}( timespec & t, time_t sec ) { t.tv_sec = sec; t.tv_nsec = 0; }
     53static inline void ?{}( timespec & t, time_t sec, __syscall_slong_t nsec ) { t.tv_sec = sec; t.tv_nsec = nsec; }
     54
     55static inline char * ctime( time_t tp ) { char * buf = ctime( &tp ); buf[24] = '\0'; return buf; }
     56static inline char * ctime_r( time_t tp, char * buf ) { ctime_r( &tp, buf ); buf[24] = '\0'; return buf; }
     57static inline tm * gmtime( time_t tp ) { return gmtime( &tp ); }
     58static inline tm * gmtime_r( time_t tp, tm * result ) { return gmtime_r( &tp, result ); }
     59static inline tm * localtime( time_t tp ) { return localtime( &tp ); }
     60static inline tm * localtime_r( time_t tp, tm * result ) { return localtime_r( &tp, result ); }
    2861
    2962
    3063//######################### Duration #########################
    3164
    32 static inline Duration ?=?( Duration & dur, zero_t ) { return dur{ 0 }; }
     65struct Duration {
     66        int64_t tv;
     67};
     68
     69static inline void ?{}( Duration & dur ) with( dur ) { tv = 0; }
     70static inline void ?{}( Duration & dur, Duration d ) with( dur ) { tv = d.tv; }
     71
     72static inline void ?{}( Duration & dur, timeval t ) with( dur ) {
     73        tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_usec * 1000;
     74} // Duration
     75
     76static inline void ?{}( Duration & dur, timespec t ) with( dur ) {
     77        tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_nsec;
     78} // Duration
     79
     80static inline Duration ?=?( Duration & dur, timeval t ) with( dur ) {
     81        tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_usec * 1000;
     82        return dur;
     83} // ?=?
     84
     85static inline Duration ?=?( Duration & dur, timespec t ) with( dur ) {
     86        tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_nsec;
     87        return dur;
     88} // ?=? timespec
     89
     90static inline void ?{}( timeval & t, Duration dur ) with( dur ) {
     91        t.tv_sec = tv / TIMEGRAN;                                                       // seconds
     92        t.tv_usec = tv % TIMEGRAN / ( TIMEGRAN / 1000000L ); // microseconds
     93} // ?{}
     94
     95static inline void ?{}( timespec & t, Duration dur ) with( dur ) {
     96        t.tv_sec = tv / TIMEGRAN;                                                       // seconds
     97        t.tv_nsec = tv % TIMEGRAN;                                                      // nanoseconds
     98} // Timespec
     99
     100static inline int64_t nsecs( Duration dur ) with( dur ) { return tv; }
    33101
    34102static inline Duration +?( Duration rhs ) with( rhs ) { return (Duration)@{ +tv }; }
    … …  
    44112static inline Duration ?*=?( Duration & lhs, int64_t rhs ) { lhs = lhs * rhs; return lhs; }
    45113
     114static inline Duration ?/?( Duration lhs, int64_t rhs ) { return (Duration)@{ lhs.tv / rhs }; }
    46115static inline int64_t ?/?( Duration lhs, Duration rhs ) { return lhs.tv / rhs.tv; }
    47 static inline Duration ?/?( Duration lhs, int64_t rhs ) { return (Duration)@{ lhs.tv / rhs }; }
    48116static inline Duration ?/=?( Duration & lhs, int64_t rhs ) { lhs = lhs / rhs; return lhs; }
    49 static inline double div( Duration lhs, Duration rhs ) { return (double)lhs.tv / (double)rhs.tv; }
    50 
    51 static inline Duration ?%?( Duration lhs, Duration rhs ) { return (Duration)@{ lhs.tv % rhs.tv }; }
    52 static inline Duration ?%=?( Duration & lhs, Duration rhs ) { lhs = lhs % rhs; return lhs; }
     117
     118static inline Duration ?%?( Duration lhs, int64_t rhs ) { return (Duration)@{ lhs.tv % rhs }; }
     119static inline int64_t ?%?( int64_t lhs, Duration rhs ) { return lhs % (rhs.tv / TIMEGRAN); }
     120static inline int64_t ?%?( Duration lhs, Duration rhs ) { return lhs.tv % rhs.tv; }
    53121
    54122static inline _Bool ?==?( Duration lhs, Duration rhs ) { return lhs.tv == rhs.tv; }
    55123static inline _Bool ?!=?( Duration lhs, Duration rhs ) { return lhs.tv != rhs.tv; }
    56 static inline _Bool ?<? ( Duration lhs, Duration rhs ) { return lhs.tv < rhs.tv; }
     124static inline _Bool ?<?( Duration lhs, Duration rhs ) { return lhs.tv < rhs.tv; }
    57125static inline _Bool ?<=?( Duration lhs, Duration rhs ) { return lhs.tv <= rhs.tv; }
    58 static inline _Bool ?>? ( Duration lhs, Duration rhs ) { return lhs.tv > rhs.tv; }
     126static inline _Bool ?>?( Duration lhs, Duration rhs ) { return lhs.tv > rhs.tv; }
    59127static inline _Bool ?>=?( Duration lhs, Duration rhs ) { return lhs.tv >= rhs.tv; }
    60128
    61 static inline _Bool ?==?( Duration lhs, zero_t ) { return lhs.tv == 0; }
    62 static inline _Bool ?!=?( Duration lhs, zero_t ) { return lhs.tv != 0; }
    63 static inline _Bool ?<? ( Duration lhs, zero_t ) { return lhs.tv <  0; }
    64 static inline _Bool ?<=?( Duration lhs, zero_t ) { return lhs.tv <= 0; }
    65 static inline _Bool ?>? ( Duration lhs, zero_t ) { return lhs.tv >  0; }
    66 static inline _Bool ?>=?( Duration lhs, zero_t ) { return lhs.tv >= 0; }
    67 
    68 static inline Duration abs( Duration rhs ) { return rhs.tv >= 0 ? rhs : -rhs; }
     129static inline Duration abs( Duration lhs ) {
     130        return lhs.tv >= 0 ? lhs : -lhs;
     131} // abs
     132
     133static inline forall( dtype ostype | ostream( ostype ) )
     134ostype & ?|?( ostype & os, Duration dur ) with( dur ) {
     135        os | tv / TIMEGRAN;
     136        char buf[16];
     137        snprintf( buf, 16, "%09ld", ((tv < 0 ? -tv : tv) % TIMEGRAN) );
     138        int i;
     139        for ( i = 8; i >= 0 && buf[i] == '0' ; i -= 1 );        // find least significant digit
     140        if ( i != -1 ) { buf[i + 1] = '\0';     os | '.' | buf; }
     141        return os;
     142}
    69143
    70144static inline Duration ?`ns( int64_t nsec ) { return (Duration)@{ nsec }; }
    71 static inline Duration ?`us( int64_t usec ) { return (Duration)@{ usec * (TIMEGRAN / 1_000_000LL) }; }
    72 static inline Duration ?`ms( int64_t msec ) { return (Duration)@{ msec * (TIMEGRAN / 1_000LL) }; }
    73 static inline Duration ?`s( int64_t sec ) { return (Duration)@{ sec * TIMEGRAN }; }
    74 static inline Duration ?`s( double sec ) { return (Duration)@{ sec * TIMEGRAN }; }
    75 static inline Duration ?`m( int64_t min ) { return (Duration)@{ min * (60LL * TIMEGRAN) }; }
    76 static inline Duration ?`m( double min ) { return (Duration)@{ min * (60LL * TIMEGRAN) }; }
    77 static inline Duration ?`h( int64_t hours ) { return (Duration)@{ hours * (60LL * 60LL * TIMEGRAN) }; }
    78 static inline Duration ?`h( double hours ) { return (Duration)@{ hours * (60LL * 60LL * TIMEGRAN) }; }
    79 static inline Duration ?`d( int64_t days ) { return (Duration)@{ days * (24LL * 60LL * 60LL * TIMEGRAN) }; }
    80 static inline Duration ?`d( double days ) { return (Duration)@{ days * (24LL * 60LL * 60LL * TIMEGRAN) }; }
    81 static inline Duration ?`w( int64_t weeks ) { return (Duration)@{ weeks * (7LL * 24LL * 60LL * 60LL * TIMEGRAN) }; }
    82 static inline Duration ?`w( double weeks ) { return (Duration)@{ weeks * (7LL * 24LL * 60LL * 60LL * TIMEGRAN) }; }
    83 
    84 static inline int64_t ?`ns( Duration dur ) { return dur.tv; }
    85 static inline int64_t ?`us( Duration dur ) { return dur.tv / (TIMEGRAN / 1_000_000LL); }
    86 static inline int64_t ?`ms( Duration dur ) { return dur.tv / (TIMEGRAN / 1_000LL); }
    87 static inline int64_t ?`s( Duration dur ) { return dur.tv / TIMEGRAN; }
    88 static inline int64_t ?`m( Duration dur ) { return dur.tv / (60LL * TIMEGRAN); }
    89 static inline int64_t ?`h( Duration dur ) { return dur.tv / (60LL * 60LL * TIMEGRAN); }
    90 static inline int64_t ?`d( Duration dur ) { return dur.tv / (24LL * 60LL * 60LL * TIMEGRAN); }
    91 static inline int64_t ?`w( Duration dur ) { return dur.tv / (7LL * 24LL * 60LL * 60LL * TIMEGRAN); }
    92 
    93 
    94 //######################### C timeval #########################
    95 
    96 static inline void ?{}( timeval & t ) {}
    97 static inline void ?{}( timeval & t, time_t sec, suseconds_t usec ) { t.tv_sec = sec; t.tv_usec = usec; }
    98 static inline void ?{}( timeval & t, time_t sec ) { t{ sec, 0 }; }
    99 static inline void ?{}( timeval & t, zero_t ) { t{ 0, 0 }; }
    100 static inline timeval ?=?( timeval & t, zero_t ) { return t{ 0 }; }
    101 static inline timeval ?+?( timeval & lhs, timeval rhs ) { return (timeval)@{ lhs.tv_sec + rhs.tv_sec, lhs.tv_usec + rhs.tv_usec }; }
    102 static inline timeval ?-?( timeval & lhs, timeval rhs ) { return (timeval)@{ lhs.tv_sec - rhs.tv_sec, lhs.tv_usec - rhs.tv_usec }; }
    103 static inline _Bool ?==?( timeval lhs, timeval rhs ) { return lhs.tv_sec == rhs.tv_sec && lhs.tv_usec == rhs.tv_usec; }
    104 static inline _Bool ?!=?( timeval lhs, timeval rhs ) { return lhs.tv_sec != rhs.tv_sec || lhs.tv_usec != rhs.tv_usec; }
    105 
    106 
    107 //######################### C timespec #########################
    108 
    109 static inline void ?{}( timespec & t ) {}
    110 static inline void ?{}( timespec & t, time_t sec, __syscall_slong_t nsec ) { t.tv_sec = sec; t.tv_nsec = nsec; }
    111 static inline void ?{}( timespec & t, time_t sec ) { t{ sec, 0}; }
    112 static inline void ?{}( timespec & t, zero_t ) { t{ 0, 0 }; }
    113 static inline timespec ?=?( timespec & t, zero_t ) { return t{ 0 }; }
    114 static inline timespec ?+?( timespec & lhs, timespec rhs ) { return (timespec)@{ lhs.tv_sec + rhs.tv_sec, lhs.tv_nsec + rhs.tv_nsec }; }
    115 static inline timespec ?-?( timespec & lhs, timespec rhs ) { return (timespec)@{ lhs.tv_sec - rhs.tv_sec, lhs.tv_nsec - rhs.tv_nsec }; }
    116 static inline _Bool ?==?( timespec lhs, timespec rhs ) { return lhs.tv_sec == rhs.tv_sec && lhs.tv_nsec == rhs.tv_nsec; }
    117 static inline _Bool ?!=?( timespec lhs, timespec rhs ) { return lhs.tv_sec != rhs.tv_sec || lhs.tv_nsec != rhs.tv_nsec; }
    118 
    119 
    120 //######################### C itimerval #########################
    121 
    122 static inline void ?{}( itimerval & itv, Duration alarm ) with( itv ) {
    123         // itimerval contains durations but but uses time data-structure timeval.
    124         it_value{ alarm`s, (alarm % 1`s)`us };                          // seconds, microseconds
    125         it_interval{ 0 };                                                                       // 0 seconds, 0 microseconds
    126 } // itimerval
    127 
    128 static inline void ?{}( itimerval & itv, Duration alarm, Duration interval ) with( itv ) {
    129         // itimerval contains durations but but uses time data-structure timeval.
    130         it_value{ alarm`s, (alarm % 1`s)`us };                          // seconds, microseconds
    131         it_interval{ interval`s, interval`us };                         // seconds, microseconds
    132 } // itimerval
     145static inline Duration ?`us( int64_t usec ) { return (Duration)@{ usec * (TIMEGRAN / 1_000l) }; }
     146static inline Duration ?`ms( int64_t msec ) { return (Duration)@{ msec * (TIMEGRAN / 1_000_000l) }; }
     147static inline Duration ?`s ( int64_t sec ) { return (Duration)@{ sec * TIMEGRAN }; }
     148static inline Duration ?`s ( double  sec ) { return (Duration)@{ sec * TIMEGRAN }; }
     149static inline Duration ?`m ( int64_t min ) { return (Duration)@{ min * (60L * TIMEGRAN) }; }
     150static inline Duration ?`m ( double  min ) { return (Duration)@{ min * (60L * TIMEGRAN) }; }
     151static inline Duration ?`h ( int64_t hours ) { return (Duration)@{ hours * (3600L * TIMEGRAN) }; }
     152static inline Duration ?`h ( double  hours ) { return (Duration)@{ hours * (3600L * TIMEGRAN) }; }
     153static inline Duration ?`d ( int64_t days ) { return (Duration)@{ days * (24L * 3600L * TIMEGRAN) }; }
     154static inline Duration ?`d ( double  days ) { return (Duration)@{ days * (24L * 3600L * TIMEGRAN) }; }
     155static inline Duration ?`w ( int64_t weeks ) { return (Duration)@{ weeks * (7L * 24L * 3600L * TIMEGRAN) }; }
     156static inline Duration ?`f ( int64_t fortnight ) { return (Duration)@{ fortnight * (14L * 24L * 3600L * TIMEGRAN) }; }
     157
     158static inline int64_t ?`s ( Duration dur ) { return dur.tv / TIMEGRAN; }
     159static inline int64_t ?`m ( Duration dur ) { return dur.tv / (60L * TIMEGRAN); }
     160static inline int64_t ?`h ( Duration dur ) { return dur.tv / (3600L * TIMEGRAN); }
     161static inline int64_t ?`d ( Duration dur ) { return dur.tv / (24L * 3600L * TIMEGRAN); }
     162static inline int64_t ?`w ( Duration dur ) { return dur.tv / (7L * 24L * 3600L * TIMEGRAN); }
     163static inline int64_t ?`f ( Duration dur ) { return dur.tv / (14L * 24L * 3600L * TIMEGRAN); }
    133164
    134165
    135166//######################### Time #########################
    136167
    137 void ?{}( Time & time, int year, int month = 0, int day = 0, int hour = 0, int min = 0, int sec = 0, int nsec = 0 );
    138 static inline Time ?=?( Time & time, zero_t ) { return time{ 0 }; }
    139 
    140 static inline void ?{}( Time & time, timeval t ) with( time ) { tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_usec * 1000; }
     168
     169struct Time {
     170        uint64_t tv;
     171};
     172
     173#ifdef __CFA_DEBUG__
     174#define CreateFmt "Attempt to create Time( year=%d, month=%d, day=%d, hour=%d, min=%d, sec=%d, nsec=%d ), " \
     175        "which exceeds range 00:00:00 UTC, January 1, 1970 to 03:14:07 UTC, January 19, 2038."
     176#endif // __CFA_DEBUG__
     177
     178void mktime( Time & time, int year, int month, int day, int hour, int min, int sec, int nsec ) with( time ) {
     179        tm tm;
     180
     181//      tzset();                                                                                        // initialize time global variables
     182        tm.tm_isdst = -1;                                                                       // let mktime determine if alternate timezone is in effect
     183        tm.tm_year = year - 1900;                                                       // mktime uses 1900 as its starting point
     184        tm.tm_mon = month - 1;
     185        tm.tm_mday = day;                                                                       // mktime uses range 1-31
     186        tm.tm_hour = hour;
     187        tm.tm_min = min;
     188        tm.tm_sec = sec;
     189        time_t epochsec = mktime( &tm );
     190#ifdef __CFA_DEBUG__
     191        if ( epochsec == (time_t)-1 ) {
     192                abort( CreateFmt, year, month, day, hour, min, sec, nsec );
     193        } // if
     194#endif // __CFA_DEBUG__
     195        tv = (int64_t)(epochsec) * TIMEGRAN + nsec;                     // convert to nanoseconds
     196#ifdef __CFA_DEBUG__
     197        if ( tv > 2147483647LL * TIMEGRAN ) {                           // between 00:00:00 UTC, January 1, 1970 and 03:14:07 UTC, January 19, 2038.
     198                abort( CreateFmt, year, month, day, hour, min, sec, nsec );
     199        } // if
     200#endif // __CFA_DEBUG__
     201} // mktime
     202
     203static inline void ?{}( Time & t ) with( t ) {
     204        tv = 0;
     205} // Time
     206
     207// These two constructors must not call mktime because it calls malloc. The malloc calls lead to recursion problems
     208// because Time values are created from the sigalrm handler in composing the next context switch event.
     209
     210static inline void ?{}( Time & t, int sec ) with( t ) {
     211#ifdef __CFA_DEBUG__
     212        if ( tv < 0 || tv > 2147483647LL ) {                            // between 00:00:00 UTC, January 1, 1970 and 03:14:07 UTC, January 19, 2038.
     213            abort( CreateFmt, 1970, 0, 0, 0, 0, sec, 0 );
     214        } // if
     215#endif // __CFA_DEBUG__
     216        tv = (int64_t)sec * TIMEGRAN;
     217} // Time
     218
     219static inline void ?{}( Time & t, int sec, int nsec ) with( t ) {
     220#ifdef __U_DEBUG__
     221        if ( tv < 0 || tv > 2147483647LL || nsec < 0 ) {        // between 00:00:00 UTC, January 1, 1970 and 03:14:07 UTC, January 19, 2038.
     222            abort( CreateFmt, 1970, 0, 0, 0, 0, sec, nsec );
     223        } // if
     224#endif // __U_DEBUG__
     225        tv = (int64_t)sec * TIMEGRAN + nsec;
     226} // Time
     227
     228static inline void ?{}( Time & time, int min, int sec, long int nsec ) {
     229        mktime( time, 1970, 1, 1, 0, min, sec, nsec );
     230} // Time
     231
     232static inline void ?{}( Time & time, int hour, int min, int sec, long int nsec ) {
     233        mktime( time, 1970, 1, 1, hour, min, sec, nsec );
     234} // Time
     235
     236static inline void ?{}( Time & time, int day, int hour, int min, int sec, long int nsec ) {
     237        mktime( time, 1970, 1, day, hour, min, sec, nsec );
     238} // Time
     239
     240static inline void ?{}( Time & time, int month, int day, int hour, int min, int sec, long int nsec ) {
     241        mktime( time, 1970, month, day, hour, min, sec, nsec );
     242} // Time
     243
     244static inline void ?{}( Time & time, int year, int month, int day, int hour, int min, int sec, long int nsec ) {
     245        mktime( time, year, month, day, hour, min, sec, nsec );
     246} // Time
     247
     248static inline void ?{}( Time & time, timeval t ) with( time ) {
     249        tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_usec * 1000;
     250} // Time
     251
     252static inline void ?{}( Time & time, timespec t ) with( time ) {
     253        tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_nsec;
     254} // Time
     255
    141256static inline Time ?=?( Time & time, timeval t ) with( time ) {
    142         tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_usec * (TIMEGRAN / 1_000_000LL);
     257        tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_usec * 1000;
    143258        return time;
    144259} // ?=?
    145260
    146 static inline void ?{}( Time & time, timespec t ) with( time ) { tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_nsec; }
    147261static inline Time ?=?( Time & time, timespec t ) with( time ) {
    148262        tv = (int64_t)t.tv_sec * TIMEGRAN + t.tv_nsec;
    149263        return time;
    150264} // ?=?
     265
     266static inline void ?{}( timeval & t, Time time ) with( time ) {
     267        t.tv_sec = tv / TIMEGRAN;                                                       // seconds
     268        t.tv_usec = tv % TIMEGRAN / ( TIMEGRAN / 1_000_000L ); // microseconds
     269} // ?{}
     270
     271static inline void ?{}( timespec & t, Time time ) with( time ) {
     272        t.tv_sec = tv / TIMEGRAN;                                                       // seconds
     273        t.tv_nsec = tv % TIMEGRAN;                                                      // nanoseconds
     274} // ?{}
     275
     276static inline int64_t nsec( Time time ) with( time ) { return tv; }
    151277
    152278static inline Time ?+?( Time & lhs, Duration rhs ) { return (Time)@{ lhs.tv + rhs.tv }; }
    … …  
    164290static inline _Bool ?>=?( Time lhs, Time rhs ) { return lhs.tv >= rhs.tv; }
    165291
    166 char * yy_mm_dd( Time time, char * buf );
    167 static inline char * ?`ymd( Time time, char * buf ) {   // short form
    168         return yy_mm_dd( time, buf );
    169 } // ymd
    170 
    171 char * mm_dd_yy( Time time, char * buf );
    172 static inline char * ?`mdy( Time time, char * buf ) {   // short form
    173         return mm_dd_yy( time, buf );
    174 } // mdy
    175 
    176 char * dd_mm_yy( Time time, char * buf );
    177 static inline char * ?`dmy( Time time, char * buf ) {   // short form
    178         return dd_mm_yy( time, buf );;
    179 } // dmy
    180 
    181 size_t strftime( char * buf, size_t size, const char * fmt, Time time );
    182 
    183 //------------------------- timeval (cont) -------------------------
    184 
    185 static inline void ?{}( timeval & t, Time time ) with( t, time ) {
    186         tv_sec = tv / TIMEGRAN;                                                         // seconds
    187         tv_usec = tv % TIMEGRAN / (TIMEGRAN / 1_000_000LL);     // microseconds
    188 } // ?{}
    189 
    190 //------------------------- timespec (cont) -------------------------
    191 
    192 static inline void ?{}( timespec & t, Time time ) with( t, time ) {
    193         tv_sec = tv / TIMEGRAN;                                                         // seconds
    194         tv_nsec = tv % TIMEGRAN;                                                        // nanoseconds
    195 } // ?{}
     292static inline char * yymmd( Time time, char * buf ) with( time ) {
     293        tm tm;
     294        time_t s = tv / TIMEGRAN;
     295        gmtime_r( &s, &tm );
     296        snprintf( buf, 9, "%02d/%02d/%02d", tm.tm_year % 99, tm.tm_mon, tm.tm_mday );
     297        return buf;
     298} // yymmd
     299
     300static inline char * mmyyd( Time time, char * buf ) with( time ) {
     301        tm tm;
     302        time_t s = tv / TIMEGRAN;
     303        gmtime_r( &s, &tm );
     304        snprintf( buf, 9, "%02d/%02d/%02d", tm.tm_mon, tm.tm_year % 99, tm.tm_mday );
     305        return buf;
     306} // yymmd
     307
     308static inline char * dmmyy( Time time, char * buf ) with( time ) {
     309        tm tm;
     310        time_t s = tv / TIMEGRAN;
     311        gmtime_r( &s, &tm );
     312        snprintf( buf, 9, "%02d/%02d/%02d", tm.tm_mday, tm.tm_mon, tm.tm_year % 99 );
     313        return buf;
     314} // yymmd
     315
     316static inline forall( dtype ostype | ostream( ostype ) )
     317ostype & ?|?( ostype & os, Time time ) with( time ) {
     318        char buf[32];                                                                           // at least 26
     319        time_t s = tv / TIMEGRAN;
     320        tm tm;
     321        gmtime_r( &s, &tm );                                                            // ctime_r adjusts for timezone
     322        asctime_r( &tm, (char *)&buf );
     323        buf[24] = '\0';                                                                         // remove trailing '\n'
     324        long int ns = (tv < 0 ? -tv : tv) % TIMEGRAN;
     325        if ( ns == 0 ) {
     326                os | buf;
     327        } else {
     328                buf[19] = '\0';
     329                os | buf;
     330                char buf2[16];
     331                snprintf( buf2, 16, "%09ld", ns );
     332                int i;
     333                for ( i = 8; i >= 0 && buf2[i] == '0' ; i -= 1 ); // find least significant digit
     334                if ( i != -1 ) { buf2[i + 1] = '\0'; os | '.' | buf2; }
     335                os | ' ' | &buf[20];
     336        } // if
     337        return os;
     338} // ?|?
     339
     340//######################### Clock #########################
     341
     342
     343struct Clock {
     344        Duration offset;                                                                        // for virtual clock: contains offset from real-time
     345        int clocktype;                                                                          // implementation only -1 (virtual), CLOCK_REALTIME
     346};
     347
     348void resetClock( Clock & clk ) with( clk ) {
     349        clocktype = CLOCK_REALTIME;
     350} // Clock::resetClock
     351
     352void resetClock( Clock & clk, Duration adj ) with( clk ) {
     353        clocktype = -1;
     354        Duration tz = (timeval){ timezone, 0 };
     355        offset = adj + tz;
     356} // resetClock
     357
     358void ?{}( Clock & clk ) {
     359        resetClock( clk );
     360} // Clock
     361
     362void ?{}( Clock & clk, Duration adj ) {
     363        resetClock( clk, adj );
     364} // Clock
     365
     366Duration getRes() {
     367        struct timespec res;
     368        clock_getres( CLOCK_REALTIME, &res );
     369        return (Duration){ res };
     370} // getRes
     371
     372Time getTime() {
     373        timespec curr;
     374        clock_gettime( CLOCK_REALTIME_COARSE, &curr );
     375        return (Time){ curr };
     376} // getTime
     377
     378Time getTime( Clock & clk ) with( clk ) {
     379        return getTime() + offset;
     380} // getTime
     381
     382Time ?()( Clock & clk ) with( clk ) {                                   // alternative syntax
     383        return getTime() + offset;
     384} // getTime
     385
     386timeval getTime( Clock & clk ) {
     387        return (timeval){ clk() };
     388} // getTime
     389
     390tm getTime( Clock & clk ) with( clk ) {
     391        tm ret;
     392        localtime_r( getTime( clk ).tv_sec, &ret );
     393        return ret;
     394} // getTime
    196395
    197396// Local Variables: //
    … …  
    199398// tab-width: 4 //
    200399// End: //
     400
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