ref: fb7dd4b3a868cb8987049c95bb32e6425a73c8b9
dir: /appl/lib/ecmascript/date.b/
# the Date object is founded on the Daytime module
UTC: con 1;
msPerSec: con big 1000;
# based on Daytime->Tm with big fields
bigTm: adt {
ms: big;
sec: big;
min: big;
hour: big;
mday: big;
mon: big;
year: big;
tzoff: int;
};
isfinite(r: real): int
{
if(math->isnan(r) || r == +Infinity || r == -Infinity)
return 0;
return 1;
}
time2Tm(t: real, utc: int): ref Daytime->Tm
{
secs := int(big t / msPerSec);
if(big t % msPerSec < big 0) # t<0?
secs -= 1;
if(utc)
tm := daytime->gmt(secs);
else
tm = daytime->local(secs);
return tm;
}
time2bigTm(t: real, utc: int): ref bigTm
{
tm := time2Tm(t, utc);
btm := ref bigTm;
btm.ms = big t % msPerSec;
if(btm.ms < big 0)
btm.ms += msPerSec;
btm.sec = big tm.sec;
btm.min = big tm.min;
btm.hour = big tm.hour;
btm.mday = big tm.mday;
btm.mon = big tm.mon;
btm.year = big tm.year;
btm.tzoff = tm.tzoff;
return btm;
}
bigTm2time(btm: ref bigTm): real
{
# normalize
if(btm.mon / big 12 != big 0){
btm.year += btm.mon / big 12;
btm.mon %= big 12;
}
if(btm.ms / msPerSec != big 0){
btm.sec += btm.ms / msPerSec;
btm.ms %= msPerSec;
}
if(btm.sec / big 60 != big 0){
btm.min += btm.sec / big 60;
btm.sec %= big 60;
}
if(btm.min / big 60 != big 0){
btm.hour += btm.hour / big 60;
btm.min %= big 60;
}
if(btm.hour / big 24 != big 0){
btm.mday += btm.mday / big 24;
btm.hour %= big 24;
}
tm := ref Tm;
tm.sec = int btm.sec;
tm.min = int btm.min;
tm.hour = int btm.hour;
tm.mday = int btm.mday;
tm.mon = int btm.mon;
tm.year = int btm.year;
tm.tzoff = btm.tzoff;
secs := daytime->tm2epoch(tm);
# check for out-of-band times
if(secs == daytime->tm2epoch(daytime->gmt(secs)))
r := real(big secs * msPerSec + btm.ms);
else
r = Math->NaN;
return r;
}
str2time(s: string): real
{
tm := daytime->string2tm(s);
if(tm == nil)
r := Math->NaN;
else
r = real (big daytime->tm2epoch(tm) * msPerSec);
return r;
}
cdate(nil: ref Exec, nil, nil: ref Ecmascript->Obj, nil: array of ref Val): ref Val
{
return strval(daytime->time());
}
# process arguments of Date() [called as constructor] and Date.UTC()
datectorargs(ex: ref Exec, args: array of ref Val): (int, ref bigTm)
{
x := array[7] of { * => big 0 };
ok := 1;
for(i := 0; i < 7 && i < len args; i++){
if(!isfinite(toNumber(ex, biarg(args, i))))
ok = 0;
else
x[i] = big toInteger(ex, biarg(args, i));
}
btm := ref bigTm;
yr := x[0];
if(yr >= big 0 && yr <= big 99)
btm.year = yr;
else
btm.year = yr - big 1900;
btm.mon = x[1];
btm.mday = x[2];
btm.hour = x[3];
btm.min = x[4];
btm.sec = x[5];
btm.ms = x[6];
return (ok, btm);
}
ndate(ex: ref Exec, nil: ref Ecmascript->Obj, args: array of ref Val): ref Ecmascript->Obj
{
o := mkobj(ex.dateproto, "Date");
r := Math->NaN;
case len args{
0 =>
r = real(big daytime->now() * msPerSec);
1 =>
v := toPrimitive(ex, biarg(args, 0), NoHint);
if(isstr(v))
r = str2time(v.str);
else if(isfinite(toNumber(ex, v))){
t := big toInteger(ex, v);
secs := t / msPerSec;
if(big t % msPerSec < big 0)
secs -= big 1;
if(secs == big int secs)
r = real t;
}
* =>
(ok, btm) := datectorargs(ex, args);
if(ok){
tm := daytime->local(daytime->now());
btm.tzoff = tm.tzoff;
r = bigTm2time(btm);
}
}
o.val = numval(r);
return o;
}
cdateparse(ex: ref Exec, nil, nil: ref Ecmascript->Obj, args: array of ref Val): ref Val
{
s := toString(ex, biarg(args, 0));
return numval(str2time(s));
}
cdateUTC(ex: ref Exec, nil, nil: ref Ecmascript->Obj, args: array of ref Val): ref Val
{
r := Math->NaN;
if(len args == 0)
r = real(big daytime->now() * msPerSec);
else{
(ok, btm) := datectorargs(ex, args);
if(ok){
btm.tzoff = 0;
r = bigTm2time(btm);
}
}
return numval(r);
}
datecheck(ex: ref Exec, o: ref Ecmascript->Obj, f: string)
{
if(!isdateobj(o))
runtime(ex, TypeError, "Date.prototype." + f + " called on non-Date object");
}
cdateprototoString(ex: ref Exec, f, this: ref Ecmascript->Obj, nil: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
secs := 0;
t := this.val.num;
if(!math->isnan(t)){
secs = int(big t / msPerSec);
if(big t % msPerSec < big 0)
secs -= 1;
}
return strval(daytime->text(daytime->local(secs)));
}
cdateprototoDateString(ex: ref Exec, f, this: ref Ecmascript->Obj, nil: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
secs := 0;
t := this.val.num;
if(!math->isnan(t)){
secs = int(big t / msPerSec);
if(big t % msPerSec < big 0)
secs -= 1;
}
s := daytime->text(daytime->local(secs));
(n, ls) := sys->tokenize(s, " ");
if(n < 3)
return strval("");
return strval(hd ls + " " + hd tl ls + " " + hd tl tl ls);
}
cdateprototoTimeString(ex: ref Exec, f, this: ref Ecmascript->Obj, nil: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
secs := 0;
t := this.val.num;
if(!math->isnan(t)){
secs = int(big t / msPerSec);
if(big t % msPerSec < big 0)
secs -= 1;
}
s := daytime->text(daytime->local(secs));
(n, ls) := sys->tokenize(s, " ");
if(n < 4)
return strval("");
return strval(hd tl tl tl ls);
}
cdateprotovalueOf(ex: ref Exec, f, this: ref Ecmascript->Obj, nil: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
return this.val;
}
cdateprotoget(ex: ref Exec, f, this: ref Ecmascript->Obj, nil: array of ref Val, utc: int): ref Val
{
datecheck(ex, this, f.val.str);
t := this.val.num;
if(!math->isnan(t)){
tm := time2Tm(t, utc);
case f.val.str{
"Date.prototype.getYear" =>
if (tm.year < 0 || tm.year > 99)
t = real(tm.year + 1900);
else
t = real tm.year;
"Date.prototype.getFullYear" or
"Date.prototype.getUTCFullYear" =>
t = real(tm.year + 1900);
"Date.prototype.getMonth" or
"Date.prototype.getUTCMonth" =>
t = real tm.mon;
"Date.prototype.getDate" or
"Date.prototype.getUTCDate" =>
t = real tm.mday;
"Date.prototype.getDay" or
"Date.prototype.getUTCDay" =>
t = real tm.wday;
"Date.prototype.getHours" or
"Date.prototype.getUTCHours" =>
t = real tm.hour;
"Date.prototype.getMinutes" or
"Date.prototype.getUTCMinutes" =>
t = real tm.min;
"Date.prototype.getSeconds" or
"Date.prototype.getUTCSeconds" =>
t = real tm.sec;
}
}
return numval(t);
}
cdateprotogetMilliseconds(ex: ref Exec, f, this: ref Ecmascript->Obj, nil: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
t := this.val.num;
if(!math->isnan(t)){
ms := big t % msPerSec;
if(ms < big 0)
ms += msPerSec;
t = real ms;
}
return numval(t);
}
cdateprotogetTimezoneOffset(ex: ref Exec, f, this: ref Ecmascript->Obj, nil: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
t := this.val.num;
if(!math->isnan(t)){
tm := time2Tm(t, !UTC);
t = real(tm.tzoff / 60);
}
return numval(t);
}
# process arguments of Date.prototype.set*() functions
dateprotosetargs(ex: ref Exec, this: ref Ecmascript->Obj, args: array of ref Val, n: int): (int, big, big, big, big)
{
x := array[4] of { * => big 0 };
ok := 1;
if(this != nil && !isfinite(this.val.num))
ok = 0;
for(i := 0; i < n && i < len args; i++){
if(!isfinite(toNumber(ex, biarg(args, i))))
ok = 0;
else
x[i] = big toInteger(ex, biarg(args, i));
}
return (ok, x[0], x[1], x[2], x[3]);
}
cdateprotosetTime(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, t, nil, nil, nil) := dateprotosetargs(ex, nil, args, 1);
if(ok){
secs := t / msPerSec;
if(big t % msPerSec < big 0)
secs -= big 1;
if(secs == big int secs)
r = real t;
}
this.val.num = r;
return numval(r);
}
cdateprotosetMilliseconds(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val, utc: int): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, ms, nil, nil, nil) := dateprotosetargs(ex, this, args, 1);
if(ok){
btm := time2bigTm(this.val.num, utc);
btm.ms = ms;
r = bigTm2time(btm);
}
this.val.num = r;
return numval(r);
}
cdateprotosetSeconds(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val, utc: int): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, sec, ms, nil, nil) := dateprotosetargs(ex, this, args, 2);
if(ok){
btm := time2bigTm(this.val.num, utc);
btm.sec = sec;
if(len args > 1)
btm.ms = ms;
r = bigTm2time(btm);
}
this.val.num = r;
return numval(r);
}
cdateprotosetMinutes(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val, utc: int): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, min, sec, ms, nil) := dateprotosetargs(ex, this, args, 3);
if(ok){
btm := time2bigTm(this.val.num, utc);
btm.min = min;
if(len args > 1){
btm.sec = sec;
if(len args > 2)
btm.ms = ms;
}
r = bigTm2time(btm);
}
this.val.num = r;
return numval(r);
}
cdateprotosetHours(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val, utc: int): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, hour, min, sec, ms) := dateprotosetargs(ex, this, args, 4);
if(ok){
btm := time2bigTm(this.val.num, utc);
btm.hour = hour;
if(len args > 1){
btm.min = min;
if(len args > 2){
btm.sec = sec;
if(len args > 3)
btm.ms = ms;
}
}
r = bigTm2time(btm);
}
this.val.num = r;
return numval(r);
}
cdateprotosetDate(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val, utc: int): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, day, nil, nil, nil) := dateprotosetargs(ex, this, args, 1);
if(ok){
btm := time2bigTm(this.val.num, utc);
btm.mday = day;
r = bigTm2time(btm);
}
this.val.num = r;
return numval(r);
}
cdateprotosetMonth(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val, utc: int): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, mon, day, nil, nil) := dateprotosetargs(ex, this, args, 2);
if(ok){
btm := time2bigTm(this.val.num, utc);
btm.mon = mon;
if(len args > 1)
btm.mday = day;
r = bigTm2time(btm);
}
this.val.num = r;
return numval(r);
}
cdateprotosetFullYear(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val, utc: int): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, year, mon, day, nil) := dateprotosetargs(ex, nil, args, 3);
if(ok){
t := this.val.num;
if(!isfinite(t))
t = 0.;
btm := time2bigTm(t, utc);
btm.year = (year - big 1900);
if(len args > 1){
btm.mon = mon;
if(len args > 2)
btm.mday = day;
}
r = bigTm2time(btm);
}
this.val.num = r;
return numval(r);
}
cdateprotosetYear(ex: ref Exec, f, this: ref Ecmascript->Obj, args: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
r := Math->NaN;
(ok, year, nil, nil, nil) := dateprotosetargs(ex, nil, args, 1);
if(ok){
t := this.val.num;
if(!isfinite(t))
t = 0.;
btm := time2bigTm(t, !UTC);
if(year >= big 0 && year <= big 99)
btm.year = year;
else
btm.year = year - big 1900;
r = bigTm2time(btm);
}
this.val.num = r;
return numval(r);
}
cdateprototoUTCString(ex: ref Exec, f, this: ref Ecmascript->Obj, nil: array of ref Val): ref Val
{
datecheck(ex, this, f.val.str);
secs := 0;
t := this.val.num;
if(!math->isnan(t)){
secs = int(big t / msPerSec);
if(big t % msPerSec < big 0)
secs -= 1;
}
return strval(daytime->text(daytime->gmt(secs)));
}