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time.c
2469 lines (2207 loc) · 61.7 KB
/
time.c
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/**********************************************************************
time.c -
$Author$
created at: Tue Dec 28 14:31:59 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
**********************************************************************/
#include "ruby/ruby.h"
#include <sys/types.h>
#include <time.h>
#include <errno.h>
#include "ruby/encoding.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <math.h>
VALUE rb_cTime;
static VALUE time_utc_offset _((VALUE));
static ID id_divmod, id_mul, id_submicro;
struct time_object {
struct timespec ts;
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 *tobj)
{
if (tobj) xfree(tobj);
}
static VALUE
time_s_alloc(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->ts.tv_sec = 0;
tobj->ts.tv_nsec = 0;
return obj;
}
static void
time_modify(VALUE time)
{
rb_check_frozen(time);
if (!OBJ_UNTRUSTED(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 to the 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 #=> 2007-11-19 07:50:02 -0600
* b = Time.new #=> 2007-11-19 07:50:02 -0600
* a == b #=> false
* "%.6f" % a.to_f #=> "1195480202.282373"
* "%.6f" % b.to_f #=> "1195480202.283415"
*
*/
static VALUE
time_init(VALUE time)
{
struct time_object *tobj;
time_modify(time);
GetTimeval(time, tobj);
tobj->tm_got=0;
tobj->ts.tv_sec = 0;
tobj->ts.tv_nsec = 0;
#ifdef HAVE_CLOCK_GETTIME
if (clock_gettime(CLOCK_REALTIME, &tobj->ts) == -1) {
rb_sys_fail("clock_gettime");
}
#else
{
struct timeval tv;
if (gettimeofday(&tv, 0) < 0) {
rb_sys_fail("gettimeofday");
}
tobj->ts.tv_sec = tv.tv_sec;
tobj->ts.tv_nsec = tv.tv_usec * 1000;
}
#endif
return time;
}
#define NDIV(x,y) (-(-((x)+1)/(y))-1)
#define NMOD(x,y) ((y)-(-((x)+1)%(y))-1)
static void
time_overflow_p(time_t *secp, long *nsecp)
{
time_t tmp, sec = *secp;
long nsec = *nsecp;
if (nsec >= 1000000000) { /* nsec positive overflow */
tmp = sec + nsec / 1000000000;
nsec %= 1000000000;
if (sec > 0 && tmp < 0) {
rb_raise(rb_eRangeError, "out of Time range");
}
sec = tmp;
}
if (nsec < 0) { /* nsec negative overflow */
tmp = sec + NDIV(nsec,1000000000); /* negative div */
nsec = NMOD(nsec,1000000000); /* negative mod */
if (sec < 0 && tmp > 0) {
rb_raise(rb_eRangeError, "out of Time range");
}
sec = tmp;
}
#ifndef NEGATIVE_TIME_T
if (sec < 0)
rb_raise(rb_eArgError, "time must be positive");
#endif
*secp = sec;
*nsecp = nsec;
}
static VALUE
time_new_internal(VALUE klass, time_t sec, long nsec)
{
VALUE time = time_s_alloc(klass);
struct time_object *tobj;
GetTimeval(time, tobj);
time_overflow_p(&sec, &nsec);
tobj->ts.tv_sec = sec;
tobj->ts.tv_nsec = nsec;
return time;
}
VALUE
rb_time_new(time_t sec, long usec)
{
return time_new_internal(rb_cTime, sec, usec * 1000);
}
VALUE
rb_time_nano_new(time_t sec, long nsec)
{
return time_new_internal(rb_cTime, sec, nsec);
}
static struct timespec
time_timespec(VALUE num, int interval)
{
struct timespec t;
const char *tstr = interval ? "time interval" : "time";
VALUE i, f, ary;
#ifndef NEGATIVE_TIME_T
interval = 1;
#endif
switch (TYPE(num)) {
case T_FIXNUM:
t.tv_sec = FIX2LONG(num);
if (interval && t.tv_sec < 0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
t.tv_nsec = 0;
break;
case T_FLOAT:
if (interval && RFLOAT_VALUE(num) < 0.0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
else {
double f, d;
d = modf(RFLOAT_VALUE(num), &f);
if (d < 0) {
d += 1;
f -= 1;
}
t.tv_sec = (time_t)f;
if (f != t.tv_sec) {
rb_raise(rb_eRangeError, "%f out of Time range", RFLOAT_VALUE(num));
}
t.tv_nsec = (long)(d*1e9+0.5);
}
break;
case T_BIGNUM:
t.tv_sec = NUM2LONG(num);
if (interval && t.tv_sec < 0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
t.tv_nsec = 0;
break;
default:
if (rb_respond_to(num, id_divmod)) {
ary = rb_check_array_type(rb_funcall(num, id_divmod, 1, INT2FIX(1)));
if (NIL_P(ary)) {
goto typeerror;
}
i = rb_ary_entry(ary, 0);
f = rb_ary_entry(ary, 1);
t.tv_sec = NUM2LONG(i);
if (interval && t.tv_sec < 0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
f = rb_funcall(f, id_mul, 1, INT2FIX(1000000000));
t.tv_nsec = NUM2LONG(f);
}
else {
typeerror:
rb_raise(rb_eTypeError, "can't convert %s into %s",
rb_obj_classname(num), tstr);
}
break;
}
return t;
}
static struct timeval
time_timeval(VALUE num, int interval)
{
struct timespec ts;
struct timeval tv;
ts = time_timespec(num, interval);
tv.tv_sec = ts.tv_sec;
tv.tv_usec = ts.tv_nsec / 1000;
return tv;
}
struct timeval
rb_time_interval(VALUE num)
{
return time_timeval(num, Qtrue);
}
struct timeval
rb_time_timeval(VALUE time)
{
struct time_object *tobj;
struct timeval t;
if (TYPE(time) == T_DATA && RDATA(time)->dfree == time_free) {
GetTimeval(time, tobj);
t.tv_sec = tobj->ts.tv_sec;
t.tv_usec = tobj->ts.tv_nsec / 1000;
return t;
}
return time_timeval(time, Qfalse);
}
struct timespec
rb_time_timespec(VALUE time)
{
struct time_object *tobj;
struct timespec t;
if (TYPE(time) == T_DATA && RDATA(time)->dfree == time_free) {
GetTimeval(time, tobj);
t = tobj->ts;
return t;
}
return time_timespec(time, Qfalse);
}
/*
* call-seq:
* Time.at(time) => time
* Time.at(seconds_with_frac) => time
* Time.at(seconds, microseconds_with_frac) => time
*
* Creates a new time object with the value given by <i>time</i>,
* the given number of <i>seconds_with_frac</i>, or
* <i>seconds</i> and <i>microseconds_with_frac</i> from the Epoch.
* <i>seconds_with_frac</i> and <i>microseconds_with_frac</i>
* can be Integer, Float, Rational, or other Numeric.
* non-portable feature allows the offset to be negative on some systems.
*
* Time.at(0) #=> 1969-12-31 18:00:00 -0600
* Time.at(Time.at(0)) #=> 1969-12-31 18:00:00 -0600
* Time.at(946702800) #=> 1999-12-31 23:00:00 -0600
* Time.at(-284061600) #=> 1960-12-31 00:00:00 -0600
* Time.at(946684800.2).usec #=> 200000
* Time.at(946684800, 123456.789).nsec #=> 123456789
*/
static VALUE
time_s_at(int argc, VALUE *argv, VALUE klass)
{
struct timespec ts;
VALUE time, t;
if (rb_scan_args(argc, argv, "11", &time, &t) == 2) {
ts.tv_sec = NUM2LONG(time);
ts.tv_nsec = NUM2LONG(rb_funcall(t, id_mul, 1, INT2FIX(1000)));
}
else {
ts = rb_time_timespec(time);
}
t = time_new_internal(klass, ts.tv_sec, ts.tv_nsec);
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 const char months[][4] = {
"jan", "feb", "mar", "apr", "may", "jun",
"jul", "aug", "sep", "oct", "nov", "dec",
};
static long
obj2long(VALUE obj)
{
if (TYPE(obj) == T_STRING) {
obj = rb_str_to_inum(obj, 10, Qfalse);
}
return NUM2LONG(obj);
}
static long
obj2nsec(VALUE obj, long *nsec)
{
struct timespec ts;
if (TYPE(obj) == T_STRING) {
obj = rb_str_to_inum(obj, 10, Qfalse);
*nsec = 0;
return NUM2LONG(obj);
}
ts = time_timespec(obj, 1);
*nsec = ts.tv_nsec;
return ts.tv_sec;
}
static long
obj2long1000(VALUE obj)
{
if (TYPE(obj) == T_STRING) {
obj = rb_str_to_inum(obj, 10, Qfalse);
return NUM2LONG(obj) * 1000;
}
return NUM2LONG(rb_funcall(obj, id_mul, 1, INT2FIX(1000)));
}
static void
time_arg(int argc, VALUE *argv, struct tm *tm, long *nsec)
{
VALUE v[8];
int i;
long year;
MEMZERO(tm, struct tm, 1);
*nsec = 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) {
rb_warning("2 digits year is used: %ld", year);
year += 100;
}
else if (69 <= year && year < 139) {
rb_warning("2 or 3 digits year is used: %ld", year);
}
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_LEN(s) == 3 &&
STRCASECMP(months[i], RSTRING_PTR(s)) == 0) {
tm->tm_mon = i;
break;
}
}
if (tm->tm_mon == -1) {
char c = RSTRING_PTR(s)[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]);
if (!NIL_P(v[6]) && argc == 7) {
tm->tm_sec = NIL_P(v[5])?0:obj2long(v[5]);
*nsec = obj2long1000(v[6]);
}
else {
/* when argc == 8, v[6] is timezone, but ignored */
tm->tm_sec = NIL_P(v[5])?0:obj2nsec(v[5], nsec);
}
/* 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 > 24
|| (tm->tm_hour == 24 && (tm->tm_min > 0 || tm->tm_sec > 0))
|| 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);
#ifdef HAVE_GMTIME_R
#define IF_HAVE_GMTIME_R(x) x
#define ASCTIME(tm, buf) asctime_r(tm, buf)
#define GMTIME(tm, result) gmtime_r(tm, &result)
#define LOCALTIME(tm, result) (tzset(),localtime_r(tm, &result))
#else
#define IF_HAVE_GMTIME_R(x) /* nothing */
#define ASCTIME(tm, buf) asctime(tm)
#define GMTIME(tm, result) gmtime(tm)
#define LOCALTIME(tm, result) localtime(tm)
#endif
static int
leap_year_p(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(struct tm *tm)
{
static const 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 const 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(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(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;
IF_HAVE_GMTIME_R(struct tm result);
#define GUESS(p) (utc_p ? GMTIME(p, result) : LOCALTIME(p, result))
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 = GUESS(&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 = GUESS(&guess)) != NULL) {
d = tmcmp(tptr, tm);
if (d == 0) return guess;
if (d < 0)
guess_hi = guess;
else
guess_lo = guess;
}
}
tm = GUESS(&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 = GUESS(&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 = GUESS(&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, result);
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, result);
if (tmcmp(tptr, tm) == 0) {
if (guess < guess2)
return guess;
else
return guess2;
}
}
}
}
}
else {
guess2 = guess + 2 * 60 * 60;
tm = LOCALTIME(&guess2, result);
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, result);
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(struct tm *tptr, int utc_p)
{
time_t t;
#ifdef NEGATIVE_TIME_T
struct tm *tmp;
#endif
struct tm buf;
IF_HAVE_GMTIME_R(struct tm result);
buf = *tptr;
if (utc_p) {
#if defined(HAVE_TIMEGM)
if ((t = timegm(&buf)) != -1)
return t;
#ifdef NEGATIVE_TIME_T
if ((tmp = GMTIME(&t, result)) &&
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, result)) &&
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(int argc, VALUE *argv, int utc_p, VALUE klass)
{
struct tm tm;
VALUE time;
long nsec;
time_arg(argc, argv, &tm, &nsec);
time = time_new_internal(klass, make_time_t(&tm, utc_p), nsec);
if (utc_p) return time_gmtime(time);
return time_localtime(time);
}
/*
* call-seq:
* Time.utc(year) => time
* Time.utc(year, month) => time
* Time.utc(year, month, day) => time
* Time.utc(year, month, day, hour) => time
* Time.utc(year, month, day, hour, min) => time
* Time.utc(year, month, day, hour, min, sec_with_frac) => time
* Time.utc(year, month, day, hour, min, sec, usec_with_frac) => time
* Time.utc(sec, min, hour, day, month, year, wday, yday, isdst, tz) => time
* Time.gm(year) => time
* Time.gm(year, month) => time
* Time.gm(year, month, day) => time
* Time.gm(year, month, day, hour) => time
* Time.gm(year, month, day, hour, min) => time
* Time.gm(year, month, day, hour, min, sec_with_frac) => time
* Time.gm(year, month, day, hour, min, sec, usec_with_frac) => 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>.
* <i>sec_with_frac</i> and <i>usec_with_frac</i> can have a fractional part.
*
* Time.utc(2000,"jan",1,20,15,1) #=> 2000-01-01 20:15:01 UTC
* Time.gm(2000,"jan",1,20,15,1) #=> 2000-01-01 20:15:01 UTC
*/
static VALUE
time_s_mkutc(int argc, VALUE *argv, VALUE klass)
{
return time_utc_or_local(argc, argv, Qtrue, klass);
}
/*
* call-seq:
* Time.local(year) => time
* Time.local(year, month) => time
* Time.local(year, month, day) => time
* Time.local(year, month, day, hour) => time
* Time.local(year, month, day, hour, min) => time
* Time.local(year, month, day, hour, min, sec_with_frac) => time
* Time.local(year, month, day, hour, min, sec, usec_with_frac) => time
* Time.local(sec, min, hour, day, month, year, wday, yday, isdst, tz) => time
* Time.mktime(year) => time
* Time.mktime(year, month) => time
* Time.mktime(year, month, day) => time
* Time.mktime(year, month, day, hour) => time
* Time.mktime(year, month, day, hour, min) => time
* Time.mktime(year, month, day, hour, min, sec_with_frac) => time
* Time.mktime(year, month, day, hour, min, sec, usec_with_frac) => time
* Time.mktime(sec, min, hour, day, month, year, wday, yday, isdst, tz) => time
*
* Same as <code>Time::gm</code>, but interprets the values in the
* local time zone.
*
* Time.local(2000,"jan",1,20,15,1) #=> 2000-01-01 20:15:01 -0600
*/
static VALUE
time_s_mktime(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 the Epoch.
*
* t = Time.now
* "%10.5f" % t.to_f #=> "1049896564.17839"
* t.to_i #=> 1049896564
*/
static VALUE
time_to_i(VALUE time)
{
struct time_object *tobj;
GetTimeval(time, tobj);
return LONG2NUM(tobj->ts.tv_sec);
}
/*
* call-seq:
* time.to_f => float