ref: abd59674ccfd3d4285e475e667458d7c2dc65b74
dir: /jsdate.c/
#include "jsi.h"
#include "jsvalue.h"
#include "jsbuiltin.h"
#include <time.h>
static double Now(void)
{
time_t now = time(NULL);
return mktime(gmtime(&now)) * 1000;
}
static double LocalTZA(void)
{
static int once = 1;
static double tza = 0;
if (once) {
time_t now = time(NULL);
time_t utc = mktime(gmtime(&now));
time_t loc = mktime(localtime(&now));
tza = (loc - utc) * 1000;
once = 0;
}
return tza;
}
static double DaylightSavingTA(double t)
{
return 0; // TODO
}
/* Helpers from the ECMA 262 specification */
#define HoursPerDay 24.0
#define MinutesPerDay (HoursPerDay * MinutesPerHour)
#define MinutesPerHour 60.0
#define SecondsPerDay (MinutesPerDay * SecondsPerMinute)
#define SecondsPerHour (MinutesPerHour * SecondsPerMinute)
#define SecondsPerMinute 60.0
#define msPerDay (SecondsPerDay * msPerSecond)
#define msPerHour (SecondsPerHour * msPerSecond)
#define msPerMinute (SecondsPerMinute * msPerSecond)
#define msPerSecond 1000.0
static int Day(double t)
{
return floor(t / msPerDay);
}
static double TimeWithinDay(double t)
{
return fmod(t, msPerDay);
}
static int DaysInYear(int y)
{
return y % 4 == 0 && (y % 100 || (y % 400 == 0)) ? 366 : 365;
}
static int DayFromYear(int y)
{
return 365 * (y - 1970) +
floor((y - 1969) / 4.0) -
floor((y - 1901) / 100.0) +
floor((y - 1601) / 400.0);
}
static double TimeFromYear(int y)
{
return DayFromYear(y) * msPerDay;
}
static int YearFromTime(double t)
{
int y = floor(t / (msPerDay * 365.2425)) + 1970;
double t2 = TimeFromYear(y);
if (t2 > t)
--y;
else if (t2 + msPerDay * DaysInYear(y) <= t)
++y;
return y;
}
static int InLeapYear(int t)
{
return DaysInYear(YearFromTime(t)) == 366;
}
static int DayWithinYear(double t)
{
return Day(t) - DayFromYear(YearFromTime(t));
}
static int MonthFromTime(double t)
{
int day = DayWithinYear(t);
int leap = InLeapYear(t);
if (day < 31) return 0;
if (day < 59 + leap) return 1;
if (day < 90 + leap) return 2;
if (day < 120 + leap) return 3;
if (day < 151 + leap) return 4;
if (day < 181 + leap) return 5;
if (day < 212 + leap) return 6;
if (day < 243 + leap) return 7;
if (day < 273 + leap) return 8;
if (day < 304 + leap) return 9;
if (day < 334 + leap) return 10;
return 11;
}
static int DateFromTime(double t)
{
int day = DayWithinYear(t);
int leap = InLeapYear(t);
switch (MonthFromTime(t)) {
case 0: return day + 1;
case 1: return day - 30;
case 2: return day - 58 - leap;
case 3: return day - 89 - leap;
case 4: return day - 119 - leap;
case 5: return day - 150 - leap;
case 6: return day - 180 - leap;
case 7: return day - 211 - leap;
case 8: return day - 242 - leap;
case 9: return day - 272 - leap;
case 10: return day - 303 - leap;
default : return day - 333 - leap;
}
}
static int WeekDay(double t)
{
return (Day(t) + 4) % 7;
}
static double LocalTime(double utc)
{
return utc + LocalTZA() + DaylightSavingTA(utc);
}
static double UTC(double loc)
{
return loc - LocalTZA() - DaylightSavingTA(loc - LocalTZA());
}
static int HourFromTime(double t)
{
return fmod(floor(t / msPerHour), HoursPerDay);
}
static int MinFromTime(double t)
{
return fmod(floor(t / msPerMinute), MinutesPerHour);
}
static int SecFromTime(double t)
{
return fmod(floor(t / msPerSecond), SecondsPerMinute);
}
static int msFromTime(double t)
{
return fmod(t, msPerSecond);
}
static double MakeTime(double hour, double min, double sec, double ms)
{
return ((hour * MinutesPerHour + min) * SecondsPerMinute + sec) * msPerSecond + ms;
}
static double MakeDay(double y, double m, double date)
{
/*
* The following array contains the day of year for the first day of
* each month, where index 0 is January, and day 0 is January 1.
*/
static const double firstDayOfMonth[2][12] = {
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334},
{0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335}
};
double yd, md;
y += floor(m / 12);
m = fmod(m, 12);
if (m < 0) m += 12;
yd = floor(TimeFromYear(y) / msPerDay);
md = firstDayOfMonth[InLeapYear(y)][(int)m];
return yd + md + date - 1;
}
static double MakeDate(double day, double time)
{
return day * msPerDay + time;
}
static double TimeClip(double t)
{
if (!isfinite(t))
return NAN;
if (abs(t) > 8.64e15)
return NAN;
return t < 0 ? -floor(-t) : floor(t);
}
static double parseDate(const char *str)
{
const char *tz;
int y = 1970, m = 0, d = 1, H = 0, M = 0, S = 0, ms = 0;
double t;
sscanf(str, "%04d-%02d-%02d%*[T ]%02d:%02d:%02d.%d", &y, &m, &d, &H, &M, &S, &ms);
t = MakeDate(MakeDay(y, m-1, d), MakeTime(H, M, S, ms));
if ((tz = strstr(str, "UTC")) && !strcmp(tz, "UTC")) return t;
if ((tz = strstr(str, "GMT")) && !strcmp(tz, "GMT")) return t;
if ((tz = strstr(str, "Z")) && !strcmp(tz, "Z")) return t;
return UTC(t);
}
/* strftime based date formatting */
#define FMT_DATE "%Y-%m-%d"
#define FMT_TIME "%H:%M:%S"
#define FMT_DATETIME "%Y-%m-%d %H:%M:%S %Z"
#define FMT_DATETIME_ISO "%Y-%m-%dT%H:%M:%SZ"
static const char *fmtlocal(const char *fmt, double t)
{
static char buf[64];
time_t tt = t * 0.001;
strftime(buf, sizeof buf, fmt, localtime(&tt));
return buf;
}
static const char *fmtutc(const char *fmt, double t)
{
static char buf[64];
time_t tt = t * 0.001;
strftime(buf, sizeof buf, fmt, gmtime(&tt));
return buf;
}
/* Date functions */
static double js_todate(js_State *J, int idx)
{
js_Object *self = js_toobject(J, idx);
if (self->type != JS_CDATE)
js_typeerror(J, "not a date");
return self->u.number;
}
static void js_setdate(js_State *J, int idx, double t)
{
js_Object *self = js_toobject(J, idx);
if (self->type != JS_CDATE)
js_typeerror(J, "not a date");
self->u.number = TimeClip(t);
js_pushnumber(J, self->u.number);
}
static void D_parse(js_State *J, unsigned int argc)
{
double t = parseDate(js_tostring(J, 1));
js_pushnumber(J, t);
}
static void D_UTC(js_State *J, unsigned int argc)
{
double y, m, d, H, M, S, ms, t;
y = js_tonumber(J, 1);
if (y < 100) y += 1900;
m = js_tonumber(J, 2);
d = argc > 2 ? js_tonumber(J, 3) : 1;
H = argc > 3 ? js_tonumber(J, 4) : 0;
M = argc > 4 ? js_tonumber(J, 5) : 0;
S = argc > 5 ? js_tonumber(J, 6) : 0;
ms = argc > 6 ? js_tonumber(J, 7) : 0;
t = MakeDate(MakeDay(y, m, d), MakeTime(H, M, S, ms));
t = TimeClip(t);
js_pushnumber(J, t);
}
static void D_now(js_State *J, unsigned int argc)
{
js_pushnumber(J, Now());
}
static void jsB_Date(js_State *J, unsigned int argc)
{
js_pushstring(J, fmtlocal(FMT_DATETIME, Now()));
}
static void jsB_new_Date(js_State *J, unsigned int argc)
{
js_Object *obj;
js_Value v;
double t;
if (argc == 0)
t = Now();
else if (argc == 1) {
v = js_toprimitive(J, 1, JS_HNONE);
if (v.type == JS_TSTRING)
t = parseDate(v.u.string);
else
t = TimeClip(jsV_tonumber(J, &v));
} else {
double y, m, d, H, M, S, ms;
y = js_tonumber(J, 1);
if (y < 100) y += 1900;
m = js_tonumber(J, 2);
d = argc > 2 ? js_tonumber(J, 3) : 1;
H = argc > 3 ? js_tonumber(J, 4) : 0;
M = argc > 4 ? js_tonumber(J, 5) : 0;
S = argc > 5 ? js_tonumber(J, 6) : 0;
ms = argc > 6 ? js_tonumber(J, 7) : 0;
t = MakeDate(MakeDay(y, m, d), MakeTime(H, M, S, ms));
t = TimeClip(UTC(t));
}
obj = jsV_newobject(J, JS_CDATE, J->Date_prototype);
obj->u.number = t;
js_pushobject(J, obj);
}
static void Dp_valueOf(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, t);
}
static void Dp_toString(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushstring(J, fmtlocal(FMT_DATETIME, t));
}
static void Dp_toDateString(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushstring(J, fmtlocal(FMT_DATE, t));
}
static void Dp_toTimeString(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushstring(J, fmtlocal(FMT_TIME, t));
}
static void Dp_toUTCString(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushstring(J, fmtutc(FMT_DATETIME, t));
}
static void Dp_toISOString(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushstring(J, fmtutc(FMT_DATETIME_ISO, t));
}
static void Dp_getFullYear(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, YearFromTime(LocalTime(t)));
}
static void Dp_getMonth(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, MonthFromTime(LocalTime(t)));
}
static void Dp_getDate(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, DateFromTime(LocalTime(t)));
}
static void Dp_getDay(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, WeekDay(LocalTime(t)));
}
static void Dp_getHours(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, HourFromTime(LocalTime(t)));
}
static void Dp_getMinutes(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, MinFromTime(LocalTime(t)));
}
static void Dp_getSeconds(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, SecFromTime(LocalTime(t)));
}
static void Dp_getMilliseconds(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, msFromTime(LocalTime(t)));
}
static void Dp_getUTCFullYear(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, YearFromTime(t));
}
static void Dp_getUTCMonth(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, MonthFromTime(t));
}
static void Dp_getUTCDate(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, DateFromTime(t));
}
static void Dp_getUTCDay(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, WeekDay(t));
}
static void Dp_getUTCHours(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, HourFromTime(t));
}
static void Dp_getUTCMinutes(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, MinFromTime(t));
}
static void Dp_getUTCSeconds(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, SecFromTime(t));
}
static void Dp_getUTCMilliseconds(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, msFromTime(t));
}
static void Dp_getTimezoneOffset(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
js_pushnumber(J, (t - LocalTime(t)) / msPerMinute);
}
static void Dp_setTime(js_State *J, unsigned int argc)
{
js_setdate(J, 0, js_tonumber(J, 1));
}
static void Dp_setMilliseconds(js_State *J, unsigned int argc)
{
double t = LocalTime(js_todate(J, 0));
double h = HourFromTime(t);
double m = MinFromTime(t);
double s = SecFromTime(t);
double ms = js_tonumber(J, 1);
js_setdate(J, 0, UTC(MakeDate(Day(t), MakeTime(h, m, s, ms))));
}
static void Dp_setSeconds(js_State *J, unsigned int argc)
{
double t = LocalTime(js_todate(J, 0));
double h = HourFromTime(t);
double m = MinFromTime(t);
double s = js_tonumber(J, 1);
double ms = argc > 1 ? js_tonumber(J, 2) : msFromTime(t);
js_setdate(J, 0, UTC(MakeDate(Day(t), MakeTime(h, m, s, ms))));
}
static void Dp_setMinutes(js_State *J, unsigned int argc)
{
double t = LocalTime(js_todate(J, 0));
double h = HourFromTime(t);
double m = js_tonumber(J, 1);
double s = argc > 1 ? js_tonumber(J, 2) : SecFromTime(t);
double ms = argc > 2 ? js_tonumber(J, 3) : msFromTime(t);
js_setdate(J, 0, UTC(MakeDate(Day(t), MakeTime(h, m, s, ms))));
}
static void Dp_setHours(js_State *J, unsigned int argc)
{
double t = LocalTime(js_todate(J, 0));
double h = js_tonumber(J, 1);
double m = argc > 1 ? js_tonumber(J, 2) : HourFromTime(t);
double s = argc > 2 ? js_tonumber(J, 3) : SecFromTime(t);
double ms = argc > 3 ? js_tonumber(J, 4) : msFromTime(t);
js_setdate(J, 0, UTC(MakeDate(Day(t), MakeTime(h, m, s, ms))));
}
static void Dp_setDate(js_State *J, unsigned int argc)
{
double t = LocalTime(js_todate(J, 0));
double y = YearFromTime(t);
double m = MonthFromTime(t);
double d = js_tonumber(J, 1);
js_setdate(J, 0, UTC(MakeDate(MakeDay(y, m, d), TimeWithinDay(t))));
}
static void Dp_setMonth(js_State *J, unsigned int argc)
{
double t = LocalTime(js_todate(J, 0));
double y = YearFromTime(t);
double m = js_tonumber(J, 1);
double d = argc > 1 ? js_tonumber(J, 3) : DateFromTime(t);
js_setdate(J, 0, UTC(MakeDate(MakeDay(y, m, d), TimeWithinDay(t))));
}
static void Dp_setFullYear(js_State *J, unsigned int argc)
{
double t = LocalTime(js_todate(J, 0));
double y = js_tonumber(J, 1);
double m = argc > 1 ? js_tonumber(J, 2) : MonthFromTime(t);
double d = argc > 2 ? js_tonumber(J, 3) : DateFromTime(t);
js_setdate(J, 0, UTC(MakeDate(MakeDay(y, m, d), TimeWithinDay(t))));
}
static void Dp_setUTCMilliseconds(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
double h = HourFromTime(t);
double m = MinFromTime(t);
double s = SecFromTime(t);
double ms = js_tonumber(J, 1);
js_setdate(J, 0, MakeDate(Day(t), MakeTime(h, m, s, ms)));
}
static void Dp_setUTCSeconds(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
double h = HourFromTime(t);
double m = MinFromTime(t);
double s = js_tonumber(J, 1);
double ms = argc > 1 ? js_tonumber(J, 2) : msFromTime(t);
js_setdate(J, 0, MakeDate(Day(t), MakeTime(h, m, s, ms)));
}
static void Dp_setUTCMinutes(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
double h = HourFromTime(t);
double m = js_tonumber(J, 1);
double s = argc > 1 ? js_tonumber(J, 2) : SecFromTime(t);
double ms = argc > 2 ? js_tonumber(J, 3) : msFromTime(t);
js_setdate(J, 0, MakeDate(Day(t), MakeTime(h, m, s, ms)));
}
static void Dp_setUTCHours(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
double h = js_tonumber(J, 1);
double m = argc > 1 ? js_tonumber(J, 2) : HourFromTime(t);
double s = argc > 2 ? js_tonumber(J, 3) : SecFromTime(t);
double ms = argc > 3 ? js_tonumber(J, 4) : msFromTime(t);
js_setdate(J, 0, MakeDate(Day(t), MakeTime(h, m, s, ms)));
}
static void Dp_setUTCDate(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
double y = YearFromTime(t);
double m = MonthFromTime(t);
double d = js_tonumber(J, 1);
js_setdate(J, 0, MakeDate(MakeDay(y, m, d), TimeWithinDay(t)));
}
static void Dp_setUTCMonth(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
double y = YearFromTime(t);
double m = js_tonumber(J, 1);
double d = argc > 1 ? js_tonumber(J, 3) : DateFromTime(t);
js_setdate(J, 0, MakeDate(MakeDay(y, m, d), TimeWithinDay(t)));
}
static void Dp_setUTCFullYear(js_State *J, unsigned int argc)
{
double t = js_todate(J, 0);
double y = js_tonumber(J, 1);
double m = argc > 1 ? js_tonumber(J, 2) : MonthFromTime(t);
double d = argc > 2 ? js_tonumber(J, 3) : DateFromTime(t);
js_setdate(J, 0, MakeDate(MakeDay(y, m, d), TimeWithinDay(t)));
}
static void Dp_toJSON(js_State *J, unsigned int argc)
{
js_Object *obj = js_toobject(J, 0);
js_Value tv = js_toprimitive(J, 0, JS_HNUMBER);
if (tv.type == JS_TNULL && !isfinite(tv.u.number)) {
js_pushnull(J);
return;
}
js_pushobject(J, obj);
js_getproperty(J, -1, "toISOString");
if (!js_iscallable(J, -1))
js_typeerror(J, "Date.prototype.toJSON: this.toISOString not a function");
js_pushobject(J, obj);
js_call(J, 0);
}
void jsB_initdate(js_State *J)
{
J->Date_prototype->u.number = 0;
js_pushobject(J, J->Date_prototype);
{
jsB_propf(J, "valueOf", Dp_valueOf, 0);
jsB_propf(J, "toString", Dp_toString, 0);
jsB_propf(J, "toDateString", Dp_toDateString, 0);
jsB_propf(J, "toTimeString", Dp_toTimeString, 0);
jsB_propf(J, "toLocaleString", Dp_toString, 0);
jsB_propf(J, "toLocaleDateString", Dp_toDateString, 0);
jsB_propf(J, "toLocaleTimeString", Dp_toTimeString, 0);
jsB_propf(J, "toUTCString", Dp_toUTCString, 0);
jsB_propf(J, "getTime", Dp_valueOf, 0);
jsB_propf(J, "getFullYear", Dp_getFullYear, 0);
jsB_propf(J, "getUTCFullYear", Dp_getUTCFullYear, 0);
jsB_propf(J, "getMonth", Dp_getMonth, 0);
jsB_propf(J, "getUTCMonth", Dp_getUTCMonth, 0);
jsB_propf(J, "getDate", Dp_getDate, 0);
jsB_propf(J, "getUTCDate", Dp_getUTCDate, 0);
jsB_propf(J, "getDay", Dp_getDay, 0);
jsB_propf(J, "getUTCDay", Dp_getUTCDay, 0);
jsB_propf(J, "getHours", Dp_getHours, 0);
jsB_propf(J, "getUTCHours", Dp_getUTCHours, 0);
jsB_propf(J, "getMinutes", Dp_getMinutes, 0);
jsB_propf(J, "getUTCMinutes", Dp_getUTCMinutes, 0);
jsB_propf(J, "getSeconds", Dp_getSeconds, 0);
jsB_propf(J, "getUTCSeconds", Dp_getUTCSeconds, 0);
jsB_propf(J, "getMilliseconds", Dp_getMilliseconds, 0);
jsB_propf(J, "getUTCMilliseconds", Dp_getUTCMilliseconds, 0);
jsB_propf(J, "getTimezoneOffset", Dp_getTimezoneOffset, 0);
jsB_propf(J, "setTime", Dp_setTime, 1);
jsB_propf(J, "setMilliseconds", Dp_setMilliseconds, 1);
jsB_propf(J, "setUTCMilliseconds", Dp_setUTCMilliseconds, 1);
jsB_propf(J, "setSeconds", Dp_setSeconds, 2);
jsB_propf(J, "setUTCSeconds", Dp_setUTCSeconds, 2);
jsB_propf(J, "setMinutes", Dp_setMinutes, 3);
jsB_propf(J, "setUTCMinutes", Dp_setUTCMinutes, 3);
jsB_propf(J, "setHours", Dp_setHours, 4);
jsB_propf(J, "setUTCHours", Dp_setUTCHours, 4);
jsB_propf(J, "setDate", Dp_setDate, 1);
jsB_propf(J, "setUTCDate", Dp_setUTCDate, 1);
jsB_propf(J, "setMonth", Dp_setMonth, 2);
jsB_propf(J, "setUTCMonth", Dp_setUTCMonth, 2);
jsB_propf(J, "setFullYear", Dp_setFullYear, 3);
jsB_propf(J, "setUTCFullYear", Dp_setUTCFullYear, 3);
/* ES5 */
jsB_propf(J, "toISOString", Dp_toISOString, 0);
jsB_propf(J, "toJSON", Dp_toJSON, 1);
}
js_newcconstructor(J, jsB_Date, jsB_new_Date, 1);
{
jsB_propf(J, "parse", D_parse, 1);
jsB_propf(J, "UTC", D_UTC, 7);
/* ES5 */
jsB_propf(J, "now", D_now, 0);
}
js_defglobal(J, "Date", JS_DONTENUM);
}