[Bug:1.9] exact Time and inexact Time

Yusuke_ENDOH · May 14, 2009, 6:52am

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e$B8=:_!"e(BTime#- e$B$,e(B Rational e$B$rJV$9$h$&$K$J$C$F$$$^$9!#e(B

$ ./ruby -e ‘p Time.now - Time.now’
(-7/156250)

e$B$7$+$7!"e(BTime.now e$B$N$h$&$Ke(B inexact
e$B$J;~9o$N:9J,$,!"e(Bexact e$B$Ne(B
e$B$h$&$K8+$($ke(B Rational e$B$K$J$k$N$O$h$/$J$$$H;W$$$^$9!#e(B

Time.gm(2000) e$B$J$I$Oe(B exact e$B$J;~9o$H9M$($i$l$^$9$,!"$=$l$G$be(B
e$B0J2<$Ge(B Rational e$B$,JV$k$N$O9%$^$7$/$J$$$H;W$$$^$9!#e(B

$ ./ruby -e ‘p Time.gm(2000) + 0.1 - Time.gm(2000)’
(3602879701896397/36028797018963968)

e$B$h$C$Fe(B Time e$B%*%V%8%’%/%H$Ke(B exact
e$B$+$I$&$+$r$"$i$o$9%U%i%0$re(B
e$B;}$?$;$kI,MW$,$"$k$N$G$O$J$$$G$7$g$&$+!#e(B

e$B$?$@!"e(BTime#- e$B$,e(B Rational
e$B$rJV$7$F$b$h$$$H;W$o$l$kNc$O!"e(B

$ ./ruby -e ‘p Time.gm(2000) + Rational(1, 2) - Time.gm(2000)’
(1/2)

e$B$/$i$$$7$+;W$$$D$-$^$;$s!#$J$N$Ge(B Time#- e$B$N7k2L$r>o$Ke(B Integer
e$B$^$?$Oe(B Float e$B$K$9$k$H$$$&A*Br$b$"$k$+$b$7$l$^$;$s!#e(B

e$B$H$j$"$($:LdBjDs5/$HDs0F$G$9!#$I$&;W$o$l$^$9$G$7$g$&!#e(B

Yusuke_ENDOH · May 14, 2009, 5:01pm

In article
[email protected],
Yusuke ENDOH [email protected] writes:

e$B8=:_!"e(BTime#- e$B$,e(B Rational e$B$rJV$9$h$&$K$J$C$F$$$^$9!#e(B

$ ./ruby -e ‘p Time.now - Time.now’
(-7/156250)

e$B$7$+$7!"e(BTime.now e$B$N$h$&$Ke(B inexact e$B$J;~9o$N:9J,$,!"e(Bexact e$B$Ne(B
e$B$h$&$K8+$($ke(B Rational e$B$K$J$k$N$O$h$/$J$$$H;W$$$^$9!#e(B

e$B0lHL$K?tCM7W;;$G$O!“CM$,;}$D8m:9$h$j$b=<J,$K9b$$@:EY$r;}$C$Fe(B
e$B$$$k?tCMI=8=$r;H$&I,MW$,$”$k$s$8$c$J$$$G$7$g$&$+!#e(B

e$B$?$H$($P!"Hf3SEC;$$;~4V$r07$&MQES$G$O!"e(Bdouble e$B$OBEEv$JABre(B
e$B;h$+$b$7$l$^$;$s!#e(B

e$B$7$+$7!“0[$J$ke(B Epoch e$B$XJQ49$9$k$H$$$&MQES$G$Oe(B double
e$B$G$O=<e(B
e$BJ,$G$J$$$3$H$b$”$k$G$7$g$&!#e(B

e$B$I$A$i$be(B Time e$BF1;N$N0z$-;;$G<B8=$G$-$^$9$,!"I,MW$J@:EY$O0[$Je(B
e$B$j$^$9!#e(B

e$B$A$J$_$K!“e(BUnix Epoch e$B$+$i%J%NICC10L$G?t$($k$H!”:#$N;~9o$Oe(B
double e$B$G2<$N$[$&$N%S%C%H$rI=8=$G$-$^$;$s!#$J$N$G!“e(Bdouble e$B7Pe(B
e$BM3$GB>$Ne(B Epoch e$B$KJQ49$7$F!“JQ49$7$?B&$G7W;;$9$k$H!”@:EY$,Mne(B
e$B$A$F$$$FE,@Z$JCM$K$J$i$J$$!”$H$$$&2DG=@-$b$"$j$^$9!#$^$!!"6qe(B
e$BBNE*$Je(B Epoch e$B$HJQ49$N$d$j$+$?$K$b$h$j$^$9$,!#e(B

inexact, exact e$B$H$$$&C1=c$J6hJL$G$O$J$/$F!“MQK!$K$h$C$F$I$Ne(B
e$B$/$i$$$N8m:9$,5vMF$G$-$k$+!”$H$$$&E@$r5DO@$9$kI,MW$,$"$k$N$Ge(B
e$B$O$J$$$G$7$g$&$+!#e(B

Yusuke_ENDOH · May 14, 2009, 6:13pm

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Tanaka A. ã•ã‚“ã¯æ›¸ãã¾ã—ãŸ:

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Yusuke_ENDOH · May 15, 2009, 1:50pm

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2009/05/15 0:00 Tanaka A. [email protected]:

e$B0lHL$K?tCM7W;;$G$O!“CM$,;}$D8m:9$h$j$b=<J,$K9b$$@:EY$r;}$C$Fe(B
e$B$$$k?tCMI=8=$r;H$&I,MW$,$”$k$s$8$c$J$$$G$7$g$&$+!#e(B

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e$BLdBj$r5$$K$7$F$$$^$9!#e(B

e$BKNIt$5$s$b$*$C$7$c$C$F$$$^$9$,!“e(BRational
e$B$O!V8m:9$,$J$$?tCM!W$re(B
e$BI=8=$7$F$$$k$h$&$K$7$+8+$($:!”!V==J,$K9b$$@:EY$r;}$C$F$$$k?tCM!We(B
e$B$H$7$F;H$o$l$F$$$k$H$O9M$(IU$-$^$;$s!#e(B

e$B$=$N$?$a!“:GDc$G$be(B Float e$B$+$ie(B Rational
e$B$K0EL[$KJQ49$5$l$k$3$H$,e(B
e$B$”$k$N$O!"2?$i$+$N=hCV$r$9$Y$-LdBj$@$H;W$$$^$9!#6qBNE*$JJ}K!$Oe(B
e$B$H$b$+$/!#e(B

e$B$7$+$7!“0[$J$ke(B Epoch e$B$XJQ49$9$k$H$$$&MQES$G$Oe(B double e$B$G$O=<e(B
e$BJ,$G$J$$$3$H$b$”$k$G$7$g$&!#e(B

e$B$I$A$i$be(B Time e$BF1;N$N0z$-;;$G<B8=$G$-$^$9$,!"I,MW$J@:EY$O0[$Je(B
e$B$j$^$9!#e(B

e$B$$$m$$$m9M$($?$s$G$9$,!"e(BTime#to_r e$B$rMQ0U$7$?$i$I$&$G$7$g$&!#e(B
e$B8m:9$J$/e(B Epoch e$BJQ49$7$?$$?M$O!"e(Bto_r e$B$7$F@53N$Je(B Unix
Epoch e$B$Ke(B
e$B$7$F$+$i!"e(BTime e$B$G$J$/e(B Rational
e$B$G$d$C$F$/$l$H$$$&$3$H$G!#e(B

Yusuke_ENDOH · May 17, 2009, 2:46pm

In article [email protected],
Yusuke ENDOH [email protected] writes:

e$B$$$m$$$m9M$($?$s$G$9$,!"e(BTime#to_r e$B$rMQ0U$7$?$i$I$&$G$7$g$&!#e(B
e$B8m:9$J$/e(B Epoch e$BJQ49$7$?$$?M$O!"e(Bto_r e$B$7$F@53N$Je(B Unix Epoch e$B$Ke(B
e$B$7$F$+$i!"e(BTime e$B$G$J$/e(B Rational e$B$G$d$C$F$/$l$H$$$&$3$H$G!#e(B

Time#to_r e$B$r2C$($k$N$O$"$jF@$k$H;W$$$^$9!#e(B

Yusuke_ENDOH · May 18, 2009, 2:06am

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:38484] Re: [Bug:1.9] exact Time and inexact
Time”
on Sun, 17 May 2009 21:46:01 +0900, Tanaka A. [email protected]
writes:

|Time#to_r e$B$r2C$($k$N$O$"$jF@$k$H;W$$$^$9!#e(B

e$B;d$b$3$A$i$K;?@.$7$^$9!#e(B

Yusuke_ENDOH · May 18, 2009, 6:03pm

e$B1sF#$G$9!#e(B

2009/05/18 9:05 Yukihiro M. [email protected]:

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:38484] Re: [Bug:1.9] exact Time and inexact Time”
on Sun, 17 May 2009 21:46:01 +0900, Tanaka A. [email protected] writes:

|Time#to_r e$B$r2C$($k$N$O$"$jF@$k$H;W$$$^$9!#e(B

e$B;d$b$3$A$i$K;?@.$7$^$9!#e(B

e$B$=$l$G$O%Q%C%A$r=q$-$^$7$?!#e(B

Time#to_r e$B$rDI2Ce(B
Time#- e$B$O>o$Ke(B Float e$B$rJV$9e(B (1.9.1 e$B$HF1$85sF0e(B)

e$BFC$KH?BP$,$J$1$l$P%3%_%C%H$7$h$&$H;W$$$^$9!#e(B

Index: time.c

— time.c (revision 23485)
+++ time.c (working copy)
@@ -2277,6 +2277,30 @@

/*

call-seq:

- ```
time.to_r => Rational
```
- Returns the value of time as a rational number of seconds
- since the Epoch.
- ```
t = Time.now
```

p t.to_r            #=> (8807170717088293/8388608)

- This method is intended to be used to get an accurate value
- representing nanoseconds from the Epoch. You can use this
- to convert time to another Epoch.
*/

+static VALUE
+time_to_r(VALUE time)
+{

struct time_object *tobj;
GetTimeval(time, tobj);
return tobj->timev;
+}

+/*

call-seq:
```
time.usec    => int
```
```
time.tv_usec => int
```

@@ -2803,7 +2827,7 @@
struct time_object *tobj2;

GetTimeval(time2, tobj2);

   return sub(tobj->timev, tobj2->timev);

```
   return rb_Float(sub(tobj->timev, tobj2->timev));
```
}
return time_add(tobj, time2, -1);
}
@@ -3682,6 +3706,7 @@

rb_define_method(rb_cTime, “to_i”, time_to_i, 0);
rb_define_method(rb_cTime, “to_f”, time_to_f, 0);
rb_define_method(rb_cTime, “to_r”, time_to_r, 0);
rb_define_method(rb_cTime, “<=>”, time_cmp, 1);
rb_define_method(rb_cTime, “eql?”, time_eql, 1);
rb_define_method(rb_cTime, “hash”, time_hash, 0);

Yusuke_ENDOH · May 21, 2009, 9:18pm

e$B%A%1%C%He(B #1481 e$B$,99?7$5$l$^$7$?!#e(B (by Yukihiro M.)

e$B%9%F!<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B
ruby -v 1.9.1e$B$K%;%C%He(B

redundant

http://redmine.ruby-lang.org/issues/show/1481

Yusuke_ENDOH · May 19, 2009, 4:08pm

e$B%A%1%C%He(B #1468 e$B$,99?7$5$l$^$7$?!#e(B (by Yusuke E.)

e$B%9%F!<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B
e$B?JD=e(B % 0e$B$+$ie(B100e$B$KJQ99e(B

Applied in changeset r23490.

http://redmine.ruby-lang.org/issues/show/1468