#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#define NEED_sv_2pv_flags
#include "ppport.h"
#include <stdlib.h>
/* This file is generated by tools/leap_seconds_header.pl */
#include "leap_seconds.h"
/* This is a temporary hack until a better solution can be found to
get the finite() function on Win32 */
#ifndef WIN32
# include <math.h>
# ifndef isfinite
# ifdef finite
# define finite isfinite
# endif
# endif
#endif
#define DAYS_PER_400_YEARS 146097
#define DAYS_PER_4_YEARS 1461
#define MARCH_1 306
#define SECONDS_PER_DAY 86400
const int PREVIOUS_MONTH_DOY[12] = { 0,
31,
59,
90,
120,
151,
181,
212,
243,
273,
304,
334 };
const int PREVIOUS_MONTH_DOLY[12] = { 0,
31,
60,
91,
121,
152,
182,
213,
244,
274,
305,
335 };
IV
_real_is_leap_year(IV y) {
/* See http://www.perlmonks.org/?node_id=274247 for where this silliness
comes from */
return (y % 4) ? 0 : (y % 100) ? 1 : (y % 400) ? 0 : 1;
}
MODULE = DateTime PACKAGE = DateTime
PROTOTYPES: ENABLE
void
_rd2ymd(self, d, extra = 0)
IV d;
IV extra;
PREINIT:
IV y, m;
IV c;
IV quarter;
IV yadj = 0;
IV dow, doy, doq;
IV rd_days;
PPCODE:
rd_days = d;
d += MARCH_1;
if (d <= 0) {
yadj = -1 * (((-1 * d) / DAYS_PER_400_YEARS) + 1);
d -= yadj * DAYS_PER_400_YEARS;
}
/* c is century */
c = ((d * 4) - 1) / DAYS_PER_400_YEARS;
d -= c * DAYS_PER_400_YEARS / 4;
y = ((d * 4) - 1) / DAYS_PER_4_YEARS;
d -= y * DAYS_PER_4_YEARS / 4;
m = ((d * 12) + 1093) / 367;
d -= ((m * 367) - 1094) / 12;
y += (c * 100) + (yadj * 400);
if (m > 12) {
++y;
m -= 12;
}
EXTEND(SP, extra ? 7 : 3);
mPUSHi(y);
mPUSHi(m);
mPUSHi(d);
if (extra) {
quarter = ( ( 1.0 / 3.1 ) * m ) + 1;
dow = rd_days % 7;
if ( dow <= 0 ) {
dow += 7;
}
mPUSHi(dow);
if (_real_is_leap_year(y)) {
doy = PREVIOUS_MONTH_DOLY[m - 1] + d;
doq = doy - PREVIOUS_MONTH_DOLY[ (3 * quarter) - 3 ];
} else {
doy = PREVIOUS_MONTH_DOY[m - 1] + d;
doq = doy - PREVIOUS_MONTH_DOY[ (3 * quarter ) - 3 ];
}
mPUSHi(doy);
mPUSHi(quarter);
mPUSHi(doq);
}
void
_ymd2rd(self, y, m, d)
IV y;
IV m;
IV d;
PREINIT:
IV adj;
PPCODE:
if (m <= 2) {
adj = (14 - m) / 12;
y -= adj;
m += 12 * adj;
} else if (m > 14) {
adj = (m - 3) / 12;
y += adj;
m -= 12 * adj;
}
if (y < 0) {
adj = (399 - y) / 400;
d -= DAYS_PER_400_YEARS * adj;
y += 400 * adj;
}
d += (m * 367 - 1094) /
12 + y % 100 * DAYS_PER_4_YEARS /
4 + (y / 100 * 36524 + y / 400) - MARCH_1;
EXTEND(SP, 1);
mPUSHi(d);
void
_seconds_as_components(self, secs, utc_secs = 0, secs_modifier = 0)
IV secs;
IV utc_secs;
IV secs_modifier;
PREINIT:
IV h, m, s;
PPCODE:
secs -= secs_modifier;
h = secs / 3600;
secs -= h * 3600;
m = secs / 60;
s = secs - (m * 60);
if (utc_secs >= SECONDS_PER_DAY) {
if (utc_secs >= SECONDS_PER_DAY + 1) {
/* If we just use %d and the IV, we get a warning that IV is
not an int. */
croak("Invalid UTC RD seconds value: %s", SvPV_nolen(newSViv(utc_secs)));
}
s += (utc_secs - SECONDS_PER_DAY) + 60;
m = 59;
h--;
if (h < 0) {
h = 23;
}
}
EXTEND(SP, 3);
mPUSHi(h);
mPUSHi(m);
mPUSHi(s);
#ifdef isfinite
void
_normalize_tai_seconds(self, days, secs)
SV* days;
SV* secs;
PPCODE:
if (isfinite(SvNV(days)) && isfinite(SvNV(secs))) {
IV d = SvIV(days);
IV s = SvIV(secs);
IV adj;
if (s < 0) {
adj = (s - (SECONDS_PER_DAY - 1)) / SECONDS_PER_DAY;
} else {
adj = s / SECONDS_PER_DAY;
}
d += adj;
s -= adj * SECONDS_PER_DAY;
sv_setiv(days, (IV) d);
sv_setiv(secs, (IV) s);
}
void
_normalize_leap_seconds(self, days, secs)
SV* days;
SV* secs;
PPCODE:
if (isfinite(SvNV(days)) && isfinite(SvNV(secs))) {
IV d = SvIV(days);
IV s = SvIV(secs);
IV day_length;
while (s < 0) {
SET_DAY_LENGTH(d - 1, day_length);
s += day_length;
d--;
}
SET_DAY_LENGTH(d, day_length);
while (s > day_length - 1) {
s -= day_length;
d++;
SET_DAY_LENGTH(d, day_length);
}
sv_setiv(days, (IV) d);
sv_setiv(secs, (IV) s);
}
#endif /* ifdef isfinite */
void
_time_as_seconds(self, h, m, s)
IV h;
IV m;
IV s;
PPCODE:
EXTEND(SP, 1);
mPUSHi(h * 3600 + m * 60 + s);
void
_is_leap_year(self, y)
IV y;
PPCODE:
EXTEND(SP, 1);
mPUSHi(_real_is_leap_year(y));
void
_day_length(self, utc_rd)
IV utc_rd;
PPCODE:
IV day_length;
SET_DAY_LENGTH(utc_rd, day_length);
EXTEND(SP, 1);
mPUSHi(day_length);
void
_day_has_leap_second(self, utc_rd)
IV utc_rd;
PPCODE:
IV day_length;
SET_DAY_LENGTH(utc_rd, day_length);
EXTEND(SP, 1);
mPUSHi(day_length > 86400 ? 1 : 0);
void
_accumulated_leap_seconds(self, utc_rd)
IV utc_rd;
PPCODE:
IV leap_seconds;
SET_LEAP_SECONDS(utc_rd, leap_seconds);
EXTEND(SP, 1);
mPUSHi(leap_seconds);