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time.c
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time.c
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/**********************************************************************
time.c -
$Author$
$Date$
created at: Tue Dec 28 14:31:59 JST 1993
Copyright (C) 1993-2003 Yukihiro Matsumoto
**********************************************************************/
#include "ruby.h"
#include <sys/types.h>
#include <time.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <math.h>
VALUE rb_cTime;
struct time_object {
struct timeval tv;
struct tm tm;
int gmt;
int tm_got;
};
#define GetTimeval(obj, tobj) \
Data_Get_Struct(obj, struct time_object, tobj)
static void time_free _((void *));
static VALUE time_utc_offset _((VALUE));
static void
time_free(tobj)
void *tobj;
{
if (tobj) free(tobj);
}
static VALUE time_s_alloc _((VALUE));
static VALUE
time_s_alloc(klass)
VALUE klass;
{
VALUE obj;
struct time_object *tobj;
obj = Data_Make_Struct(klass, struct time_object, 0, time_free, tobj);
tobj->tm_got=0;
tobj->tv.tv_sec = 0;
tobj->tv.tv_usec = 0;
return obj;
}
static void
time_modify(time)
VALUE time;
{
rb_check_frozen(time);
if (!OBJ_TAINTED(time) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: can't modify Time");
}
/*
* Document-method: now
*
* Synonym for <code>Time.new</code>. Returns a +Time+ object
* initialized tot he current system time.
*
* call-seq:
* Time.new -> time
*
* Returns a <code>Time</code> object initialized to the current system
* time. <b>Note:</b> The object created will be created using the
* resolution available on your system clock, and so may include
* fractional seconds.
*
* a = Time.new #=> Wed Apr 09 08:56:03 CDT 2003
* b = Time.new #=> Wed Apr 09 08:56:03 CDT 2003
* a == b #=> false
* "%.6f" % a.to_f #=> "1049896563.230740"
* "%.6f" % b.to_f #=> "1049896563.231466"
*
*/
static VALUE
time_init(time)
VALUE time;
{
struct time_object *tobj;
time_modify(time);
GetTimeval(time, tobj);
tobj->tm_got=0;
tobj->tv.tv_sec = 0;
tobj->tv.tv_usec = 0;
if (gettimeofday(&tobj->tv, 0) < 0) {
rb_sys_fail("gettimeofday");
}
return time;
}
#define NDIV(x,y) (-(-((x)+1)/(y))-1)
#define NMOD(x,y) ((y)-(-((x)+1)%(y))-1)
static void
time_overflow_p(secp, usecp)
time_t *secp, *usecp;
{
time_t tmp, sec = *secp, usec = *usecp;
if (usec >= 1000000) { /* usec positive overflow */
tmp = sec + usec / 1000000;
usec %= 1000000;
if (sec > 0 && tmp < 0) {
rb_raise(rb_eRangeError, "out of Time range");
}
sec = tmp;
}
if (usec < 0) { /* usec negative overflow */
tmp = sec + NDIV(usec,1000000); /* negative div */
usec = NMOD(usec,1000000); /* negative mod */
if (sec < 0 && tmp > 0) {
rb_raise(rb_eRangeError, "out of Time range");
}
sec = tmp;
}
#ifndef NEGATIVE_TIME_T
if (sec < 0 || (sec == 0 && usec < 0))
rb_raise(rb_eArgError, "time must be positive");
#endif
*secp = sec;
*usecp = usec;
}
static VALUE time_new_internal _((VALUE, time_t, time_t));
static VALUE
time_new_internal(klass, sec, usec)
VALUE klass;
time_t sec, usec;
{
VALUE time = time_s_alloc(klass);
struct time_object *tobj;
GetTimeval(time, tobj);
time_overflow_p(&sec, &usec);
tobj->tv.tv_sec = sec;
tobj->tv.tv_usec = usec;
return time;
}
VALUE
rb_time_new(sec, usec)
time_t sec, usec;
{
return time_new_internal(rb_cTime, sec, usec);
}
static struct timeval
time_timeval(time, interval)
VALUE time;
int interval;
{
struct timeval t;
char *tstr = interval ? "time interval" : "time";
#ifndef NEGATIVE_TIME_T
interval = 1;
#endif
switch (TYPE(time)) {
case T_FIXNUM:
t.tv_sec = FIX2LONG(time);
if (interval && t.tv_sec < 0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
t.tv_usec = 0;
break;
case T_FLOAT:
if (interval && RFLOAT(time)->value < 0.0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
else {
double f, d;
d = modf(RFLOAT(time)->value, &f);
t.tv_sec = (time_t)f;
if (f != t.tv_sec) {
rb_raise(rb_eRangeError, "%f out of Time range", RFLOAT(time)->value);
}
t.tv_usec = (time_t)(d*1e6+0.5);
}
break;
case T_BIGNUM:
t.tv_sec = NUM2LONG(time);
if (interval && t.tv_sec < 0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
t.tv_usec = 0;
break;
default:
rb_raise(rb_eTypeError, "can't convert %s into %s",
rb_obj_classname(time), tstr);
break;
}
return t;
}
struct timeval
rb_time_interval(time)
VALUE time;
{
return time_timeval(time, Qtrue);
}
struct timeval
rb_time_timeval(time)
VALUE time;
{
struct time_object *tobj;
struct timeval t;
if (TYPE(time) == T_DATA && RDATA(time)->dfree == time_free) {
GetTimeval(time, tobj);
t = tobj->tv;
return t;
}
return time_timeval(time, Qfalse);
}
/*
* call-seq:
* Time.at( aTime ) => time
* Time.at( seconds [, microseconds] ) => time
*
* Creates a new time object with the value given by <i>aTime</i>, or
* the given number of <i>seconds</i> (and optional
* <i>microseconds</i>) from epoch. A non-portable feature allows the
* offset to be negative on some systems.
*
* Time.at(0) #=> Wed Dec 31 18:00:00 CST 1969
* Time.at(946702800) #=> Fri Dec 31 23:00:00 CST 1999
* Time.at(-284061600) #=> Sat Dec 31 00:00:00 CST 1960
*/
static VALUE
time_s_at(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
struct timeval tv;
VALUE time, t;
if (rb_scan_args(argc, argv, "11", &time, &t) == 2) {
tv.tv_sec = NUM2LONG(time);
tv.tv_usec = NUM2LONG(t);
}
else {
tv = rb_time_timeval(time);
}
t = time_new_internal(klass, tv.tv_sec, tv.tv_usec);
if (TYPE(time) == T_DATA && RDATA(time)->dfree == time_free) {
struct time_object *tobj, *tobj2;
GetTimeval(time, tobj);
GetTimeval(t, tobj2);
tobj2->gmt = tobj->gmt;
}
return t;
}
static char *months [12] = {
"jan", "feb", "mar", "apr", "may", "jun",
"jul", "aug", "sep", "oct", "nov", "dec",
};
static long
obj2long(obj)
VALUE obj;
{
if (TYPE(obj) == T_STRING) {
obj = rb_str_to_inum(obj, 10, Qfalse);
}
return NUM2LONG(obj);
}
static void
time_arg(argc, argv, tm, usec)
int argc;
VALUE *argv;
struct tm *tm;
time_t *usec;
{
VALUE v[8];
int i;
long year;
MEMZERO(tm, struct tm, 1);
*usec = 0;
if (argc == 10) {
v[0] = argv[5];
v[1] = argv[4];
v[2] = argv[3];
v[3] = argv[2];
v[4] = argv[1];
v[5] = argv[0];
v[6] = Qnil;
tm->tm_isdst = RTEST(argv[8]) ? 1 : 0;
}
else {
rb_scan_args(argc, argv, "17", &v[0],&v[1],&v[2],&v[3],&v[4],&v[5],&v[6],&v[7]);
/* v[6] may be usec or zone (parsedate) */
/* v[7] is wday (parsedate; ignored) */
tm->tm_wday = -1;
tm->tm_isdst = -1;
}
year = obj2long(v[0]);
if (0 <= year && year < 39) {
year += 100;
rb_warning("2 digits year is used");
}
else if (69 <= year && year < 139) {
rb_warning("2 or 3 digits year is used");
}
else {
year -= 1900;
}
tm->tm_year = year;
if (NIL_P(v[1])) {
tm->tm_mon = 0;
}
else {
VALUE s = rb_check_string_type(v[1]);
if (!NIL_P(s)) {
tm->tm_mon = -1;
for (i=0; i<12; i++) {
if (RSTRING(s)->len == 3 &&
strcasecmp(months[i], RSTRING(v[1])->ptr) == 0) {
tm->tm_mon = i;
break;
}
}
if (tm->tm_mon == -1) {
char c = RSTRING(s)->ptr[0];
if ('0' <= c && c <= '9') {
tm->tm_mon = obj2long(s)-1;
}
}
}
else {
tm->tm_mon = obj2long(v[1])-1;
}
}
if (NIL_P(v[2])) {
tm->tm_mday = 1;
}
else {
tm->tm_mday = obj2long(v[2]);
}
tm->tm_hour = NIL_P(v[3])?0:obj2long(v[3]);
tm->tm_min = NIL_P(v[4])?0:obj2long(v[4]);
tm->tm_sec = NIL_P(v[5])?0:obj2long(v[5]);
if (!NIL_P(v[6])) {
if (argc == 8) {
/* v[6] is timezone, but ignored */
}
else if (argc == 7) {
*usec = obj2long(v[6]);
}
}
/* value validation */
if (
tm->tm_year != year ||
#ifndef NEGATIVE_TIME_T
tm->tm_year < 69 ||
#endif
tm->tm_mon < 0 || tm->tm_mon > 11
|| tm->tm_mday < 1 || tm->tm_mday > 31
|| tm->tm_hour < 0 || tm->tm_hour > 23
|| tm->tm_min < 0 || tm->tm_min > 59
|| tm->tm_sec < 0 || tm->tm_sec > 60)
rb_raise(rb_eArgError, "argument out of range");
}
static VALUE time_gmtime _((VALUE));
static VALUE time_localtime _((VALUE));
static VALUE time_get_tm _((VALUE, int));
static int
leap_year_p(y)
long y;
{
return ((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0);
}
#define DIV(n,d) ((n)<0 ? NDIV((n),(d)) : (n)/(d))
static time_t
timegm_noleapsecond(tm)
struct tm *tm;
{
static int common_year_yday_offset[] = {
-1,
-1 + 31,
-1 + 31 + 28,
-1 + 31 + 28 + 31,
-1 + 31 + 28 + 31 + 30,
-1 + 31 + 28 + 31 + 30 + 31,
-1 + 31 + 28 + 31 + 30 + 31 + 30,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30
/* 1 2 3 4 5 6 7 8 9 10 11 */
};
static int leap_year_yday_offset[] = {
-1,
-1 + 31,
-1 + 31 + 29,
-1 + 31 + 29 + 31,
-1 + 31 + 29 + 31 + 30,
-1 + 31 + 29 + 31 + 30 + 31,
-1 + 31 + 29 + 31 + 30 + 31 + 30,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30
/* 1 2 3 4 5 6 7 8 9 10 11 */
};
long tm_year = tm->tm_year;
int tm_yday = tm->tm_mday;
if (leap_year_p(tm_year + 1900))
tm_yday += leap_year_yday_offset[tm->tm_mon];
else
tm_yday += common_year_yday_offset[tm->tm_mon];
/*
* `Seconds Since the Epoch' in SUSv3:
* tm_sec + tm_min*60 + tm_hour*3600 + tm_yday*86400 +
* (tm_year-70)*31536000 + ((tm_year-69)/4)*86400 -
* ((tm_year-1)/100)*86400 + ((tm_year+299)/400)*86400
*/
return tm->tm_sec + tm->tm_min*60 + tm->tm_hour*3600 +
(time_t)(tm_yday +
(tm_year-70)*365 +
DIV(tm_year-69,4) -
DIV(tm_year-1,100) +
DIV(tm_year+299,400))*86400;
}
static int
tmcmp(a, b)
struct tm *a;
struct tm *b;
{
if (a->tm_year != b->tm_year)
return a->tm_year < b->tm_year ? -1 : 1;
else if (a->tm_mon != b->tm_mon)
return a->tm_mon < b->tm_mon ? -1 : 1;
else if (a->tm_mday != b->tm_mday)
return a->tm_mday < b->tm_mday ? -1 : 1;
else if (a->tm_hour != b->tm_hour)
return a->tm_hour < b->tm_hour ? -1 : 1;
else if (a->tm_min != b->tm_min)
return a->tm_min < b->tm_min ? -1 : 1;
else if (a->tm_sec != b->tm_sec)
return a->tm_sec < b->tm_sec ? -1 : 1;
else
return 0;
}
#if SIZEOF_TIME_T == SIZEOF_LONG
typedef unsigned long unsigned_time_t;
#elif SIZEOF_TIME_T == SIZEOF_INT
typedef unsigned int unsigned_time_t;
#elif SIZEOF_TIME_T == SIZEOF_LONG_LONG
typedef unsigned LONG_LONG unsigned_time_t;
#else
# error cannot find integer type which size is same as time_t.
#endif
static time_t
search_time_t(tptr, utc_p)
struct tm *tptr;
int utc_p;
{
time_t guess, guess_lo, guess_hi;
struct tm *tm, tm_lo, tm_hi;
int d, have_guess;
int find_dst;
find_dst = 0 < tptr->tm_isdst;
#ifdef NEGATIVE_TIME_T
guess_lo = (time_t)~((unsigned_time_t)~(time_t)0 >> 1);
#else
guess_lo = 0;
#endif
guess_hi = ((time_t)-1) < ((time_t)0) ?
(time_t)((unsigned_time_t)~(time_t)0 >> 1) :
~(time_t)0;
guess = timegm_noleapsecond(tptr);
tm = (utc_p ? gmtime : localtime)(&guess);
if (tm) {
d = tmcmp(tptr, tm);
if (d == 0) return guess;
if (d < 0) {
guess_hi = guess;
guess -= 24 * 60 * 60;
}
else {
guess_lo = guess;
guess += 24 * 60 * 60;
}
if (guess_lo < guess && guess < guess_hi &&
(tm = (utc_p ? gmtime : localtime)(&guess)) != NULL) {
d = tmcmp(tptr, tm);
if (d == 0) return guess;
if (d < 0)
guess_hi = guess;
else
guess_lo = guess;
}
}
tm = (utc_p ? gmtime : localtime)(&guess_lo);
if (!tm) goto error;
d = tmcmp(tptr, tm);
if (d < 0) goto out_of_range;
if (d == 0) return guess_lo;
tm_lo = *tm;
tm = (utc_p ? gmtime : localtime)(&guess_hi);
if (!tm) goto error;
d = tmcmp(tptr, tm);
if (d > 0) goto out_of_range;
if (d == 0) return guess_hi;
tm_hi = *tm;
have_guess = 0;
while (guess_lo + 1 < guess_hi) {
/* there is a gap between guess_lo and guess_hi. */
unsigned long range = 0;
if (!have_guess) {
int a, b;
/*
Try precious guess by a linear interpolation at first.
`a' and `b' is a coefficient of guess_lo and guess_hi as:
guess = (guess_lo * a + guess_hi * b) / (a + b)
However this causes overflow in most cases, following assignment
is used instead:
guess = guess_lo / d * a + (guess_lo % d) * a / d
+ guess_hi / d * b + (guess_hi % d) * b / d
where d = a + b
To avoid overflow in this assignment, `d' is restricted to less than
sqrt(2**31). By this restriction and other reasons, the guess is
not accurate and some error is expected. `range' approximates
the maximum error.
When these parameters are not suitable, i.e. guess is not within
guess_lo and guess_hi, simple guess by binary search is used.
*/
range = 366 * 24 * 60 * 60;
a = (tm_hi.tm_year - tptr->tm_year);
b = (tptr->tm_year - tm_lo.tm_year);
/* 46000 is selected as `some big number less than sqrt(2**31)'. */
if (a + b <= 46000 / 12) {
range = 31 * 24 * 60 * 60;
a *= 12;
b *= 12;
a += tm_hi.tm_mon - tptr->tm_mon;
b += tptr->tm_mon - tm_lo.tm_mon;
if (a + b <= 46000 / 31) {
range = 24 * 60 * 60;
a *= 31;
b *= 31;
a += tm_hi.tm_mday - tptr->tm_mday;
b += tptr->tm_mday - tm_lo.tm_mday;
if (a + b <= 46000 / 24) {
range = 60 * 60;
a *= 24;
b *= 24;
a += tm_hi.tm_hour - tptr->tm_hour;
b += tptr->tm_hour - tm_lo.tm_hour;
if (a + b <= 46000 / 60) {
range = 60;
a *= 60;
b *= 60;
a += tm_hi.tm_min - tptr->tm_min;
b += tptr->tm_min - tm_lo.tm_min;
if (a + b <= 46000 / 60) {
range = 1;
a *= 60;
b *= 60;
a += tm_hi.tm_sec - tptr->tm_sec;
b += tptr->tm_sec - tm_lo.tm_sec;
}
}
}
}
}
if (a <= 0) a = 1;
if (b <= 0) b = 1;
d = a + b;
/*
Although `/' and `%' may produce unexpected result with negative
argument, it doesn't cause serious problem because there is a
fail safe.
*/
guess = guess_lo / d * a + (guess_lo % d) * a / d
+ guess_hi / d * b + (guess_hi % d) * b / d;
have_guess = 1;
}
if (guess <= guess_lo || guess_hi <= guess) {
/* Precious guess is invalid. try binary search. */
guess = guess_lo / 2 + guess_hi / 2;
if (guess <= guess_lo)
guess = guess_lo + 1;
else if (guess >= guess_hi)
guess = guess_hi - 1;
range = 0;
}
tm = (utc_p ? gmtime : localtime)(&guess);
if (!tm) goto error;
have_guess = 0;
d = tmcmp(tptr, tm);
if (d < 0) {
guess_hi = guess;
tm_hi = *tm;
if (range) {
guess = guess - range;
range = 0;
if (guess_lo < guess && guess < guess_hi)
have_guess = 1;
}
}
else if (d > 0) {
guess_lo = guess;
tm_lo = *tm;
if (range) {
guess = guess + range;
range = 0;
if (guess_lo < guess && guess < guess_hi)
have_guess = 1;
}
}
else {
if (!utc_p) {
/* If localtime is nonmonotonic, another result may exist. */
time_t guess2;
if (find_dst) {
guess2 = guess - 2 * 60 * 60;
tm = localtime(&guess2);
if (tm) {
if (tptr->tm_hour != (tm->tm_hour + 2) % 24 ||
tptr->tm_min != tm->tm_min ||
tptr->tm_sec != tm->tm_sec) {
guess2 -= (tm->tm_hour - tptr->tm_hour) * 60 * 60 +
(tm->tm_min - tptr->tm_min) * 60 +
(tm->tm_sec - tptr->tm_sec);
if (tptr->tm_mday != tm->tm_mday)
guess2 += 24 * 60 * 60;
if (guess != guess2) {
tm = localtime(&guess2);
if (tmcmp(tptr, tm) == 0) {
if (guess < guess2)
return guess;
else
return guess2;
}
}
}
}
}
else {
guess2 = guess + 2 * 60 * 60;
tm = localtime(&guess2);
if (tm) {
if ((tptr->tm_hour + 2) % 24 != tm->tm_hour ||
tptr->tm_min != tm->tm_min ||
tptr->tm_sec != tm->tm_sec) {
guess2 -= (tm->tm_hour - tptr->tm_hour) * 60 * 60 +
(tm->tm_min - tptr->tm_min) * 60 +
(tm->tm_sec - tptr->tm_sec);
if (tptr->tm_mday != tm->tm_mday)
guess2 -= 24 * 60 * 60;
if (guess != guess2) {
tm = localtime(&guess2);
if (tmcmp(tptr, tm) == 0) {
if (guess < guess2)
return guess2;
else
return guess;
}
}
}
}
}
}
return guess;
}
}
/* Given argument has no corresponding time_t. Let's outerpolation. */
if (tm_lo.tm_year == tptr->tm_year && tm_lo.tm_mon == tptr->tm_mon) {
return guess_lo +
(tptr->tm_mday - tm_lo.tm_mday) * 24 * 60 * 60 +
(tptr->tm_hour - tm_lo.tm_hour) * 60 * 60 +
(tptr->tm_min - tm_lo.tm_min) * 60 +
(tptr->tm_sec - tm_lo.tm_sec);
}
else if (tm_hi.tm_year == tptr->tm_year && tm_hi.tm_mon == tptr->tm_mon) {
return guess_hi +
(tptr->tm_mday - tm_hi.tm_mday) * 24 * 60 * 60 +
(tptr->tm_hour - tm_hi.tm_hour) * 60 * 60 +
(tptr->tm_min - tm_hi.tm_min) * 60 +
(tptr->tm_sec - tm_hi.tm_sec);
}
out_of_range:
rb_raise(rb_eArgError, "time out of range");
error:
rb_raise(rb_eArgError, "gmtime/localtime error");
return 0; /* not reached */
}
static time_t
make_time_t(tptr, utc_p)
struct tm *tptr;
int utc_p;
{
time_t t;
struct tm *tmp, buf;
buf = *tptr;
if (utc_p) {
#if defined(HAVE_TIMEGM)
if ((t = timegm(&buf)) != -1)
return t;
#ifdef NEGATIVE_TIME_T
if ((tmp = gmtime(&t)) &&
tptr->tm_year == tmp->tm_year &&
tptr->tm_mon == tmp->tm_mon &&
tptr->tm_mday == tmp->tm_mday &&
tptr->tm_hour == tmp->tm_hour &&
tptr->tm_min == tmp->tm_min &&
tptr->tm_sec == tmp->tm_sec)
return t;
#endif
#endif
return search_time_t(&buf, utc_p);
}
else {
#if defined(HAVE_MKTIME)
if ((t = mktime(&buf)) != -1)
return t;
#ifdef NEGATIVE_TIME_T
if ((tmp = localtime(&t)) &&
tptr->tm_year == tmp->tm_year &&
tptr->tm_mon == tmp->tm_mon &&
tptr->tm_mday == tmp->tm_mday &&
tptr->tm_hour == tmp->tm_hour &&
tptr->tm_min == tmp->tm_min &&
tptr->tm_sec == tmp->tm_sec)
return t;
#endif
#endif
return search_time_t(&buf, utc_p);
}
}
static VALUE
time_utc_or_local(argc, argv, utc_p, klass)
int argc;
VALUE *argv;
int utc_p;
VALUE klass;
{
struct tm tm;
VALUE time;
time_t usec;
time_arg(argc, argv, &tm, &usec);
time = time_new_internal(klass, make_time_t(&tm, utc_p), usec);
if (utc_p) return time_gmtime(time);
return time_localtime(time);
}
/*
* call-seq:
* Time.utc( year [, month, day, hour, min, sec, usec] ) => time
* Time.utc( sec, min, hour, day, month, year, wday, yday, isdst, tz
* ) => time
* Time.gm( year [, month, day, hour, min, sec, usec] ) => time
* Time.gm( sec, min, hour, day, month, year, wday, yday, isdst, tz
* ) => time
*
* Creates a time based on given values, interpreted as UTC (GMT). The
* year must be specified. Other values default to the minimum value
* for that field (and may be <code>nil</code> or omitted). Months may
* be specified by numbers from 1 to 12, or by the three-letter English
* month names. Hours are specified on a 24-hour clock (0..23). Raises
* an <code>ArgumentError</code> if any values are out of range. Will
* also accept ten arguments in the order output by
* <code>Time#to_a</code>.
*
* Time.utc(2000,"jan",1,20,15,1) #=> Sat Jan 01 20:15:01 UTC 2000
* Time.gm(2000,"jan",1,20,15,1) #=> Sat Jan 01 20:15:01 UTC 2000
*/
static VALUE
time_s_mkutc(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
return time_utc_or_local(argc, argv, Qtrue, klass);
}
/*
* call-seq:
* Time.local( year [, month, day, hour, min, sec, usec] ) => time
* Time.local( sec, min, hour, day, month, year, wday, yday, isdst,
* tz ) => time
* Time.mktime( year, month, day, hour, min, sec, usec ) => time
*
* Same as <code>Time::gm</code>, but interprets the values in the
* local time zone.
*
* Time.local(2000,"jan",1,20,15,1) #=> Sat Jan 01 20:15:01 CST 2000
*/
static VALUE
time_s_mktime(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
return time_utc_or_local(argc, argv, Qfalse, klass);
}
/*
* call-seq:
* time.to_i => int
* time.tv_sec => int
*
* Returns the value of <i>time</i> as an integer number of seconds
* since epoch.
*
* t = Time.now
* "%10.5f" % t.to_f #=> "1049896564.17839"
* t.to_i #=> 1049896564
*/
static VALUE
time_to_i(time)
VALUE time;
{
struct time_object *tobj;
GetTimeval(time, tobj);
return LONG2NUM(tobj->tv.tv_sec);
}
/*
* call-seq:
* time.to_f => float
*
* Returns the value of <i>time</i> as a floating point number of
* seconds since epoch.
*
* t = Time.now
* "%10.5f" % t.to_f #=> "1049896564.13654"
* t.to_i #=> 1049896564
*/
static VALUE
time_to_f(time)
VALUE time;
{
struct time_object *tobj;
GetTimeval(time, tobj);
return rb_float_new((double)tobj->tv.tv_sec+(double)tobj->tv.tv_usec/1e6);
}
/*
* call-seq:
* time.usec => int
* time.tv_usec => int
*
* Returns just the number of microseconds for <i>time</i>.
*
* t = Time.now #=> Wed Apr 09 08:56:04 CDT 2003
* "%10.6f" % t.to_f #=> "1049896564.259970"
* t.usec #=> 259970
*/
static VALUE
time_usec(time)
VALUE time;
{
struct time_object *tobj;
GetTimeval(time, tobj);
return LONG2NUM(tobj->tv.tv_usec);
}
/*
* call-seq:
* time <=> other_time => -1, 0, +1
* time <=> numeric => -1, 0, +1
*
* Comparison---Compares <i>time</i> with <i>other_time</i> or with
* <i>numeric</i>, which is the number of seconds (possibly
* fractional) since epoch.
*
* t = Time.now #=> Wed Apr 09 08:56:03 CDT 2003
* t2 = t + 2592000 #=> Fri May 09 08:56:03 CDT 2003
* t <=> t2 #=> -1
* t2 <=> t #=> 1
* t <=> t #=> 0
*/
static VALUE
time_cmp(time1, time2)
VALUE time1, time2;
{
struct time_object *tobj1, *tobj2;
GetTimeval(time1, tobj1);
if (TYPE(time2) == T_DATA && RDATA(time2)->dfree == time_free) {
GetTimeval(time2, tobj2);
if (tobj1->tv.tv_sec == tobj2->tv.tv_sec) {
if (tobj1->tv.tv_usec == tobj2->tv.tv_usec) return INT2FIX(0);
if (tobj1->tv.tv_usec > tobj2->tv.tv_usec) return INT2FIX(1);
return INT2FIX(-1);
}
if (tobj1->tv.tv_sec > tobj2->tv.tv_sec) return INT2FIX(1);
return INT2FIX(-1);
}
return Qnil;
}
/*
* call-seq:
* time.eql?(other_time)
*
* Return <code>true</code> if <i>time</i> and <i>other_time</i> are
* both <code>Time</code> objects with the same seconds and fractional
* seconds.
*/
static VALUE
time_eql(time1, time2)
VALUE time1, time2;
{
struct time_object *tobj1, *tobj2;
GetTimeval(time1, tobj1);
if (TYPE(time2) == T_DATA && RDATA(time2)->dfree == time_free) {
GetTimeval(time2, tobj2);
if (tobj1->tv.tv_sec == tobj2->tv.tv_sec) {
if (tobj1->tv.tv_usec == tobj2->tv.tv_usec) return Qtrue;
}
}
return Qfalse;
}
/*
* call-seq:
* time.utc? => true or false
* time.gmt? => true or false