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date_core.c
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date_core.c
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/*
date_core.c: Coded by Tadayoshi Funaba 2010-2014
*/
#include "ruby.h"
#include "ruby/encoding.h"
#include "ruby/util.h"
#include <math.h>
#include <time.h>
#if defined(HAVE_SYS_TIME_H)
#include <sys/time.h>
#endif
#undef NDEBUG
#define NDEBUG
#include <assert.h>
#ifdef RUBY_EXTCONF_H
#include RUBY_EXTCONF_H
#endif
#define USE_PACK
static ID id_cmp, id_le_p, id_ge_p, id_eqeq_p;
static VALUE cDate, cDateTime;
static VALUE eDateError;
static VALUE half_days_in_day, day_in_nanoseconds;
static double positive_inf, negative_inf;
// used by deconstruct_keys
static VALUE sym_year, sym_month, sym_day, sym_yday, sym_wday;
static VALUE sym_hour, sym_min, sym_sec, sym_sec_fraction, sym_zone;
#define f_boolcast(x) ((x) ? Qtrue : Qfalse)
#define f_abs(x) rb_funcall(x, rb_intern("abs"), 0)
#define f_negate(x) rb_funcall(x, rb_intern("-@"), 0)
#define f_add(x,y) rb_funcall(x, '+', 1, y)
#define f_sub(x,y) rb_funcall(x, '-', 1, y)
#define f_mul(x,y) rb_funcall(x, '*', 1, y)
#define f_div(x,y) rb_funcall(x, '/', 1, y)
#define f_quo(x,y) rb_funcall(x, rb_intern("quo"), 1, y)
#define f_idiv(x,y) rb_funcall(x, rb_intern("div"), 1, y)
#define f_mod(x,y) rb_funcall(x, '%', 1, y)
#define f_remainder(x,y) rb_funcall(x, rb_intern("remainder"), 1, y)
#define f_expt(x,y) rb_funcall(x, rb_intern("**"), 1, y)
#define f_floor(x) rb_funcall(x, rb_intern("floor"), 0)
#define f_ceil(x) rb_funcall(x, rb_intern("ceil"), 0)
#define f_truncate(x) rb_funcall(x, rb_intern("truncate"), 0)
#define f_round(x) rb_funcall(x, rb_intern("round"), 0)
#define f_to_i(x) rb_funcall(x, rb_intern("to_i"), 0)
#define f_to_r(x) rb_funcall(x, rb_intern("to_r"), 0)
#define f_to_s(x) rb_funcall(x, rb_intern("to_s"), 0)
#define f_inspect(x) rb_funcall(x, rb_intern("inspect"), 0)
#define f_add3(x,y,z) f_add(f_add(x, y), z)
#define f_sub3(x,y,z) f_sub(f_sub(x, y), z)
#define f_frozen_ary(...) rb_obj_freeze(rb_ary_new3(__VA_ARGS__))
static VALUE date_initialize(int argc, VALUE *argv, VALUE self);
static VALUE datetime_initialize(int argc, VALUE *argv, VALUE self);
#define RETURN_FALSE_UNLESS_NUMERIC(obj) if(!RTEST(rb_obj_is_kind_of((obj), rb_cNumeric))) return Qfalse
inline static void
check_numeric(VALUE obj, const char* field)
{
if(!RTEST(rb_obj_is_kind_of(obj, rb_cNumeric))) {
rb_raise(rb_eTypeError, "invalid %s (not numeric)", field);
}
}
inline static int
f_cmp(VALUE x, VALUE y)
{
if (FIXNUM_P(x) && FIXNUM_P(y)) {
long c = FIX2LONG(x) - FIX2LONG(y);
if (c > 0)
return 1;
else if (c < 0)
return -1;
return 0;
}
return rb_cmpint(rb_funcallv(x, id_cmp, 1, &y), x, y);
}
inline static VALUE
f_lt_p(VALUE x, VALUE y)
{
if (FIXNUM_P(x) && FIXNUM_P(y))
return f_boolcast(FIX2LONG(x) < FIX2LONG(y));
return rb_funcall(x, '<', 1, y);
}
inline static VALUE
f_gt_p(VALUE x, VALUE y)
{
if (FIXNUM_P(x) && FIXNUM_P(y))
return f_boolcast(FIX2LONG(x) > FIX2LONG(y));
return rb_funcall(x, '>', 1, y);
}
inline static VALUE
f_le_p(VALUE x, VALUE y)
{
if (FIXNUM_P(x) && FIXNUM_P(y))
return f_boolcast(FIX2LONG(x) <= FIX2LONG(y));
return rb_funcall(x, id_le_p, 1, y);
}
inline static VALUE
f_ge_p(VALUE x, VALUE y)
{
if (FIXNUM_P(x) && FIXNUM_P(y))
return f_boolcast(FIX2LONG(x) >= FIX2LONG(y));
return rb_funcall(x, id_ge_p, 1, y);
}
inline static VALUE
f_eqeq_p(VALUE x, VALUE y)
{
if (FIXNUM_P(x) && FIXNUM_P(y))
return f_boolcast(FIX2LONG(x) == FIX2LONG(y));
return rb_funcall(x, id_eqeq_p, 1, y);
}
inline static VALUE
f_zero_p(VALUE x)
{
switch (TYPE(x)) {
case T_FIXNUM:
return f_boolcast(FIX2LONG(x) == 0);
case T_BIGNUM:
return Qfalse;
case T_RATIONAL:
{
VALUE num = rb_rational_num(x);
return f_boolcast(FIXNUM_P(num) && FIX2LONG(num) == 0);
}
}
return rb_funcall(x, id_eqeq_p, 1, INT2FIX(0));
}
#define f_nonzero_p(x) (!f_zero_p(x))
inline static VALUE
f_negative_p(VALUE x)
{
if (FIXNUM_P(x))
return f_boolcast(FIX2LONG(x) < 0);
return rb_funcall(x, '<', 1, INT2FIX(0));
}
#define f_positive_p(x) (!f_negative_p(x))
#define f_ajd(x) rb_funcall(x, rb_intern("ajd"), 0)
#define f_jd(x) rb_funcall(x, rb_intern("jd"), 0)
#define f_year(x) rb_funcall(x, rb_intern("year"), 0)
#define f_mon(x) rb_funcall(x, rb_intern("mon"), 0)
#define f_mday(x) rb_funcall(x, rb_intern("mday"), 0)
#define f_wday(x) rb_funcall(x, rb_intern("wday"), 0)
#define f_hour(x) rb_funcall(x, rb_intern("hour"), 0)
#define f_min(x) rb_funcall(x, rb_intern("min"), 0)
#define f_sec(x) rb_funcall(x, rb_intern("sec"), 0)
/* copied from time.c */
#define NDIV(x,y) (-(-((x)+1)/(y))-1)
#define NMOD(x,y) ((y)-(-((x)+1)%(y))-1)
#define DIV(n,d) ((n)<0 ? NDIV((n),(d)) : (n)/(d))
#define MOD(n,d) ((n)<0 ? NMOD((n),(d)) : (n)%(d))
#define HAVE_JD (1 << 0)
#define HAVE_DF (1 << 1)
#define HAVE_CIVIL (1 << 2)
#define HAVE_TIME (1 << 3)
#define COMPLEX_DAT (1 << 7)
#define have_jd_p(x) ((x)->flags & HAVE_JD)
#define have_df_p(x) ((x)->flags & HAVE_DF)
#define have_civil_p(x) ((x)->flags & HAVE_CIVIL)
#define have_time_p(x) ((x)->flags & HAVE_TIME)
#define complex_dat_p(x) ((x)->flags & COMPLEX_DAT)
#define simple_dat_p(x) (!complex_dat_p(x))
#define ITALY 2299161 /* 1582-10-15 */
#define ENGLAND 2361222 /* 1752-09-14 */
#define JULIAN positive_inf
#define GREGORIAN negative_inf
#define DEFAULT_SG ITALY
#define UNIX_EPOCH_IN_CJD INT2FIX(2440588) /* 1970-01-01 */
#define MINUTE_IN_SECONDS 60
#define HOUR_IN_SECONDS 3600
#define DAY_IN_SECONDS 86400
#define SECOND_IN_MILLISECONDS 1000
#define SECOND_IN_NANOSECONDS 1000000000
#define JC_PERIOD0 1461 /* 365.25 * 4 */
#define GC_PERIOD0 146097 /* 365.2425 * 400 */
#define CM_PERIOD0 71149239 /* (lcm 7 1461 146097) */
#define CM_PERIOD (0xfffffff / CM_PERIOD0 * CM_PERIOD0)
#define CM_PERIOD_JCY (CM_PERIOD / JC_PERIOD0 * 4)
#define CM_PERIOD_GCY (CM_PERIOD / GC_PERIOD0 * 400)
#define REFORM_BEGIN_YEAR 1582
#define REFORM_END_YEAR 1930
#define REFORM_BEGIN_JD 2298874 /* ns 1582-01-01 */
#define REFORM_END_JD 2426355 /* os 1930-12-31 */
#ifdef USE_PACK
#define SEC_WIDTH 6
#define MIN_WIDTH 6
#define HOUR_WIDTH 5
#define MDAY_WIDTH 5
#define MON_WIDTH 4
#define SEC_SHIFT 0
#define MIN_SHIFT SEC_WIDTH
#define HOUR_SHIFT (MIN_WIDTH + SEC_WIDTH)
#define MDAY_SHIFT (HOUR_WIDTH + MIN_WIDTH + SEC_WIDTH)
#define MON_SHIFT (MDAY_WIDTH + HOUR_WIDTH + MIN_WIDTH + SEC_WIDTH)
#define PK_MASK(x) ((1 << (x)) - 1)
#define EX_SEC(x) (((x) >> SEC_SHIFT) & PK_MASK(SEC_WIDTH))
#define EX_MIN(x) (((x) >> MIN_SHIFT) & PK_MASK(MIN_WIDTH))
#define EX_HOUR(x) (((x) >> HOUR_SHIFT) & PK_MASK(HOUR_WIDTH))
#define EX_MDAY(x) (((x) >> MDAY_SHIFT) & PK_MASK(MDAY_WIDTH))
#define EX_MON(x) (((x) >> MON_SHIFT) & PK_MASK(MON_WIDTH))
#define PACK5(m,d,h,min,s) \
(((m) << MON_SHIFT) | ((d) << MDAY_SHIFT) |\
((h) << HOUR_SHIFT) | ((min) << MIN_SHIFT) | ((s) << SEC_SHIFT))
#define PACK2(m,d) \
(((m) << MON_SHIFT) | ((d) << MDAY_SHIFT))
#endif
#ifdef HAVE_FLOAT_H
#include <float.h>
#endif
#if defined(FLT_RADIX) && defined(FLT_MANT_DIG) && FLT_RADIX == 2 && FLT_MANT_DIG > 22
#define date_sg_t float
#else
#define date_sg_t double
#endif
/* A set of nth, jd, df and sf denote ajd + 1/2. Each ajd begin at
* noon of GMT (assume equal to UTC). However, this begins at
* midnight.
*/
struct SimpleDateData
{
unsigned flags;
int jd; /* as utc */
VALUE nth; /* not always canonicalized */
date_sg_t sg; /* 2298874..2426355 or -/+oo -- at most 22 bits */
/* decoded as utc=local */
int year; /* truncated */
#ifndef USE_PACK
int mon;
int mday;
/* hour is zero */
/* min is zero */
/* sec is zero */
#else
/* packed civil */
unsigned pc;
#endif
};
struct ComplexDateData
{
unsigned flags;
int jd; /* as utc */
VALUE nth; /* not always canonicalized */
date_sg_t sg; /* 2298874..2426355 or -/+oo -- at most 22 bits */
/* decoded as local */
int year; /* truncated */
#ifndef USE_PACK
int mon;
int mday;
int hour;
int min;
int sec;
#else
/* packed civil */
unsigned pc;
#endif
int df; /* as utc, in secs */
int of; /* in secs */
VALUE sf; /* in nano secs */
};
union DateData {
unsigned flags;
struct SimpleDateData s;
struct ComplexDateData c;
};
#define get_d1(x)\
union DateData *dat;\
TypedData_Get_Struct(x, union DateData, &d_lite_type, dat);
#define get_d1a(x)\
union DateData *adat;\
TypedData_Get_Struct(x, union DateData, &d_lite_type, adat);
#define get_d1b(x)\
union DateData *bdat;\
TypedData_Get_Struct(x, union DateData, &d_lite_type, bdat);
#define get_d2(x,y)\
union DateData *adat, *bdat;\
TypedData_Get_Struct(x, union DateData, &d_lite_type, adat);\
TypedData_Get_Struct(y, union DateData, &d_lite_type, bdat);
inline static VALUE
canon(VALUE x)
{
if (RB_TYPE_P(x, T_RATIONAL)) {
VALUE den = rb_rational_den(x);
if (FIXNUM_P(den) && FIX2LONG(den) == 1)
return rb_rational_num(x);
}
return x;
}
#ifndef USE_PACK
#define set_to_simple(obj, x, _nth, _jd ,_sg, _year, _mon, _mday, _flags) \
do {\
RB_OBJ_WRITE((obj), &(x)->nth, canon(_nth)); \
(x)->jd = _jd;\
(x)->sg = (date_sg_t)(_sg);\
(x)->year = _year;\
(x)->mon = _mon;\
(x)->mday = _mday;\
(x)->flags = (_flags) & ~COMPLEX_DAT;\
} while (0)
#else
#define set_to_simple(obj, x, _nth, _jd ,_sg, _year, _mon, _mday, _flags) \
do {\
RB_OBJ_WRITE((obj), &(x)->nth, canon(_nth)); \
(x)->jd = _jd;\
(x)->sg = (date_sg_t)(_sg);\
(x)->year = _year;\
(x)->pc = PACK2(_mon, _mday);\
(x)->flags = (_flags) & ~COMPLEX_DAT;\
} while (0)
#endif
#ifndef USE_PACK
#define set_to_complex(obj, x, _nth, _jd ,_df, _sf, _of, _sg,\
_year, _mon, _mday, _hour, _min, _sec, _flags) \
do {\
RB_OBJ_WRITE((obj), &(x)->nth, canon(_nth));\
(x)->jd = _jd;\
(x)->df = _df;\
RB_OBJ_WRITE((obj), &(x)->sf, canon(_sf));\
(x)->of = _of;\
(x)->sg = (date_sg_t)(_sg);\
(x)->year = _year;\
(x)->mon = _mon;\
(x)->mday = _mday;\
(x)->hour = _hour;\
(x)->min = _min;\
(x)->sec = _sec;\
(x)->flags = (_flags) | COMPLEX_DAT;\
} while (0)
#else
#define set_to_complex(obj, x, _nth, _jd ,_df, _sf, _of, _sg,\
_year, _mon, _mday, _hour, _min, _sec, _flags) \
do {\
RB_OBJ_WRITE((obj), &(x)->nth, canon(_nth));\
(x)->jd = _jd;\
(x)->df = _df;\
RB_OBJ_WRITE((obj), &(x)->sf, canon(_sf));\
(x)->of = _of;\
(x)->sg = (date_sg_t)(_sg);\
(x)->year = _year;\
(x)->pc = PACK5(_mon, _mday, _hour, _min, _sec);\
(x)->flags = (_flags) | COMPLEX_DAT;\
} while (0)
#endif
#ifndef USE_PACK
#define copy_simple_to_complex(obj, x, y) \
do {\
RB_OBJ_WRITE((obj), &(x)->nth, (y)->nth);\
(x)->jd = (y)->jd;\
(x)->df = 0;\
(x)->sf = INT2FIX(0);\
(x)->of = 0;\
(x)->sg = (date_sg_t)((y)->sg);\
(x)->year = (y)->year;\
(x)->mon = (y)->mon;\
(x)->mday = (y)->mday;\
(x)->hour = 0;\
(x)->min = 0;\
(x)->sec = 0;\
(x)->flags = (y)->flags;\
} while (0)
#else
#define copy_simple_to_complex(obj, x, y) \
do {\
RB_OBJ_WRITE((obj), &(x)->nth, (y)->nth);\
(x)->jd = (y)->jd;\
(x)->df = 0;\
RB_OBJ_WRITE((obj), &(x)->sf, INT2FIX(0));\
(x)->of = 0;\
(x)->sg = (date_sg_t)((y)->sg);\
(x)->year = (y)->year;\
(x)->pc = PACK5(EX_MON((y)->pc), EX_MDAY((y)->pc), 0, 0, 0);\
(x)->flags = (y)->flags;\
} while (0)
#endif
#ifndef USE_PACK
#define copy_complex_to_simple(obj, x, y) \
do {\
RB_OBJ_WRITE((obj), &(x)->nth, (y)->nth);\
(x)->jd = (y)->jd;\
(x)->sg = (date_sg_t)((y)->sg);\
(x)->year = (y)->year;\
(x)->mon = (y)->mon;\
(x)->mday = (y)->mday;\
(x)->flags = (y)->flags;\
} while (0)
#else
#define copy_complex_to_simple(obj, x, y) \
do {\
RB_OBJ_WRITE((obj), &(x)->nth, (y)->nth);\
(x)->jd = (y)->jd;\
(x)->sg = (date_sg_t)((y)->sg);\
(x)->year = (y)->year;\
(x)->pc = PACK2(EX_MON((y)->pc), EX_MDAY((y)->pc));\
(x)->flags = (y)->flags;\
} while (0)
#endif
/* base */
static int c_valid_civil_p(int, int, int, double,
int *, int *, int *, int *);
static int
c_find_fdoy(int y, double sg, int *rjd, int *ns)
{
int d, rm, rd;
for (d = 1; d < 31; d++)
if (c_valid_civil_p(y, 1, d, sg, &rm, &rd, rjd, ns))
return 1;
return 0;
}
static int
c_find_ldoy(int y, double sg, int *rjd, int *ns)
{
int i, rm, rd;
for (i = 0; i < 30; i++)
if (c_valid_civil_p(y, 12, 31 - i, sg, &rm, &rd, rjd, ns))
return 1;
return 0;
}
#ifndef NDEBUG
/* :nodoc: */
static int
c_find_fdom(int y, int m, double sg, int *rjd, int *ns)
{
int d, rm, rd;
for (d = 1; d < 31; d++)
if (c_valid_civil_p(y, m, d, sg, &rm, &rd, rjd, ns))
return 1;
return 0;
}
#endif
static int
c_find_ldom(int y, int m, double sg, int *rjd, int *ns)
{
int i, rm, rd;
for (i = 0; i < 30; i++)
if (c_valid_civil_p(y, m, 31 - i, sg, &rm, &rd, rjd, ns))
return 1;
return 0;
}
static void
c_civil_to_jd(int y, int m, int d, double sg, int *rjd, int *ns)
{
double a, b, jd;
if (m <= 2) {
y -= 1;
m += 12;
}
a = floor(y / 100.0);
b = 2 - a + floor(a / 4.0);
jd = floor(365.25 * (y + 4716)) +
floor(30.6001 * (m + 1)) +
d + b - 1524;
if (jd < sg) {
jd -= b;
*ns = 0;
}
else
*ns = 1;
*rjd = (int)jd;
}
static void
c_jd_to_civil(int jd, double sg, int *ry, int *rm, int *rdom)
{
double x, a, b, c, d, e, y, m, dom;
if (jd < sg)
a = jd;
else {
x = floor((jd - 1867216.25) / 36524.25);
a = jd + 1 + x - floor(x / 4.0);
}
b = a + 1524;
c = floor((b - 122.1) / 365.25);
d = floor(365.25 * c);
e = floor((b - d) / 30.6001);
dom = b - d - floor(30.6001 * e);
if (e <= 13) {
m = e - 1;
y = c - 4716;
}
else {
m = e - 13;
y = c - 4715;
}
*ry = (int)y;
*rm = (int)m;
*rdom = (int)dom;
}
static void
c_ordinal_to_jd(int y, int d, double sg, int *rjd, int *ns)
{
int ns2;
c_find_fdoy(y, sg, rjd, &ns2);
*rjd += d - 1;
*ns = (*rjd < sg) ? 0 : 1;
}
static void
c_jd_to_ordinal(int jd, double sg, int *ry, int *rd)
{
int rm2, rd2, rjd, ns;
c_jd_to_civil(jd, sg, ry, &rm2, &rd2);
c_find_fdoy(*ry, sg, &rjd, &ns);
*rd = (jd - rjd) + 1;
}
static void
c_commercial_to_jd(int y, int w, int d, double sg, int *rjd, int *ns)
{
int rjd2, ns2;
c_find_fdoy(y, sg, &rjd2, &ns2);
rjd2 += 3;
*rjd =
(rjd2 - MOD((rjd2 - 1) + 1, 7)) +
7 * (w - 1) +
(d - 1);
*ns = (*rjd < sg) ? 0 : 1;
}
static void
c_jd_to_commercial(int jd, double sg, int *ry, int *rw, int *rd)
{
int ry2, rm2, rd2, a, rjd2, ns2;
c_jd_to_civil(jd - 3, sg, &ry2, &rm2, &rd2);
a = ry2;
c_commercial_to_jd(a + 1, 1, 1, sg, &rjd2, &ns2);
if (jd >= rjd2)
*ry = a + 1;
else {
c_commercial_to_jd(a, 1, 1, sg, &rjd2, &ns2);
*ry = a;
}
*rw = 1 + DIV(jd - rjd2, 7);
*rd = MOD(jd + 1, 7);
if (*rd == 0)
*rd = 7;
}
static void
c_weeknum_to_jd(int y, int w, int d, int f, double sg, int *rjd, int *ns)
{
int rjd2, ns2;
c_find_fdoy(y, sg, &rjd2, &ns2);
rjd2 += 6;
*rjd = (rjd2 - MOD(((rjd2 - f) + 1), 7) - 7) + 7 * w + d;
*ns = (*rjd < sg) ? 0 : 1;
}
static void
c_jd_to_weeknum(int jd, int f, double sg, int *ry, int *rw, int *rd)
{
int rm, rd2, rjd, ns, j;
c_jd_to_civil(jd, sg, ry, &rm, &rd2);
c_find_fdoy(*ry, sg, &rjd, &ns);
rjd += 6;
j = jd - (rjd - MOD((rjd - f) + 1, 7)) + 7;
*rw = (int)DIV(j, 7);
*rd = (int)MOD(j, 7);
}
#ifndef NDEBUG
/* :nodoc: */
static void
c_nth_kday_to_jd(int y, int m, int n, int k, double sg, int *rjd, int *ns)
{
int rjd2, ns2;
if (n > 0) {
c_find_fdom(y, m, sg, &rjd2, &ns2);
rjd2 -= 1;
}
else {
c_find_ldom(y, m, sg, &rjd2, &ns2);
rjd2 += 7;
}
*rjd = (rjd2 - MOD((rjd2 - k) + 1, 7)) + 7 * n;
*ns = (*rjd < sg) ? 0 : 1;
}
#endif
inline static int
c_jd_to_wday(int jd)
{
return MOD(jd + 1, 7);
}
#ifndef NDEBUG
/* :nodoc: */
static void
c_jd_to_nth_kday(int jd, double sg, int *ry, int *rm, int *rn, int *rk)
{
int rd, rjd, ns2;
c_jd_to_civil(jd, sg, ry, rm, &rd);
c_find_fdom(*ry, *rm, sg, &rjd, &ns2);
*rn = DIV(jd - rjd, 7) + 1;
*rk = c_jd_to_wday(jd);
}
#endif
static int
c_valid_ordinal_p(int y, int d, double sg,
int *rd, int *rjd, int *ns)
{
int ry2, rd2;
if (d < 0) {
int rjd2, ns2;
if (!c_find_ldoy(y, sg, &rjd2, &ns2))
return 0;
c_jd_to_ordinal(rjd2 + d + 1, sg, &ry2, &rd2);
if (ry2 != y)
return 0;
d = rd2;
}
c_ordinal_to_jd(y, d, sg, rjd, ns);
c_jd_to_ordinal(*rjd, sg, &ry2, &rd2);
if (ry2 != y || rd2 != d)
return 0;
return 1;
}
static const int monthtab[2][13] = {
{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
{ 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
};
inline static int
c_julian_leap_p(int y)
{
return MOD(y, 4) == 0;
}
inline static int
c_gregorian_leap_p(int y)
{
return (MOD(y, 4) == 0 && y % 100 != 0) || MOD(y, 400) == 0;
}
static int
c_julian_last_day_of_month(int y, int m)
{
assert(m >= 1 && m <= 12);
return monthtab[c_julian_leap_p(y) ? 1 : 0][m];
}
static int
c_gregorian_last_day_of_month(int y, int m)
{
assert(m >= 1 && m <= 12);
return monthtab[c_gregorian_leap_p(y) ? 1 : 0][m];
}
static int
c_valid_julian_p(int y, int m, int d, int *rm, int *rd)
{
int last;
if (m < 0)
m += 13;
if (m < 1 || m > 12)
return 0;
last = c_julian_last_day_of_month(y, m);
if (d < 0)
d = last + d + 1;
if (d < 1 || d > last)
return 0;
*rm = m;
*rd = d;
return 1;
}
static int
c_valid_gregorian_p(int y, int m, int d, int *rm, int *rd)
{
int last;
if (m < 0)
m += 13;
if (m < 1 || m > 12)
return 0;
last = c_gregorian_last_day_of_month(y, m);
if (d < 0)
d = last + d + 1;
if (d < 1 || d > last)
return 0;
*rm = m;
*rd = d;
return 1;
}
static int
c_valid_civil_p(int y, int m, int d, double sg,
int *rm, int *rd, int *rjd, int *ns)
{
int ry;
if (m < 0)
m += 13;
if (m < 1 || m > 12)
return 0;
if (d < 0) {
if (!c_find_ldom(y, m, sg, rjd, ns))
return 0;
c_jd_to_civil(*rjd + d + 1, sg, &ry, rm, rd);
if (ry != y || *rm != m)
return 0;
d = *rd;
}
c_civil_to_jd(y, m, d, sg, rjd, ns);
c_jd_to_civil(*rjd, sg, &ry, rm, rd);
if (ry != y || *rm != m || *rd != d)
return 0;
return 1;
}
static int
c_valid_commercial_p(int y, int w, int d, double sg,
int *rw, int *rd, int *rjd, int *ns)
{
int ns2, ry2, rw2, rd2;
if (d < 0)
d += 8;
if (w < 0) {
int rjd2;
c_commercial_to_jd(y + 1, 1, 1, sg, &rjd2, &ns2);
c_jd_to_commercial(rjd2 + w * 7, sg, &ry2, &rw2, &rd2);
if (ry2 != y)
return 0;
w = rw2;
}
c_commercial_to_jd(y, w, d, sg, rjd, ns);
c_jd_to_commercial(*rjd, sg, &ry2, rw, rd);
if (y != ry2 || w != *rw || d != *rd)
return 0;
return 1;
}
static int
c_valid_weeknum_p(int y, int w, int d, int f, double sg,
int *rw, int *rd, int *rjd, int *ns)
{
int ns2, ry2, rw2, rd2;
if (d < 0)
d += 7;
if (w < 0) {
int rjd2;
c_weeknum_to_jd(y + 1, 1, f, f, sg, &rjd2, &ns2);
c_jd_to_weeknum(rjd2 + w * 7, f, sg, &ry2, &rw2, &rd2);
if (ry2 != y)
return 0;
w = rw2;
}
c_weeknum_to_jd(y, w, d, f, sg, rjd, ns);
c_jd_to_weeknum(*rjd, f, sg, &ry2, rw, rd);
if (y != ry2 || w != *rw || d != *rd)
return 0;
return 1;
}
#ifndef NDEBUG
/* :nodoc: */
static int
c_valid_nth_kday_p(int y, int m, int n, int k, double sg,
int *rm, int *rn, int *rk, int *rjd, int *ns)
{
int ns2, ry2, rm2, rn2, rk2;
if (k < 0)
k += 7;
if (n < 0) {
int t, ny, nm, rjd2;
t = y * 12 + m;
ny = DIV(t, 12);
nm = MOD(t, 12) + 1;
c_nth_kday_to_jd(ny, nm, 1, k, sg, &rjd2, &ns2);
c_jd_to_nth_kday(rjd2 + n * 7, sg, &ry2, &rm2, &rn2, &rk2);
if (ry2 != y || rm2 != m)
return 0;
n = rn2;
}
c_nth_kday_to_jd(y, m, n, k, sg, rjd, ns);
c_jd_to_nth_kday(*rjd, sg, &ry2, rm, rn, rk);
if (y != ry2 || m != *rm || n != *rn || k != *rk)
return 0;
return 1;
}
#endif
static int
c_valid_time_p(int h, int min, int s, int *rh, int *rmin, int *rs)
{
if (h < 0)
h += 24;
if (min < 0)
min += 60;
if (s < 0)
s += 60;
*rh = h;
*rmin = min;
*rs = s;
return !(h < 0 || h > 24 ||
min < 0 || min > 59 ||
s < 0 || s > 59 ||
(h == 24 && (min > 0 || s > 0)));
}
inline static int
c_valid_start_p(double sg)
{
if (isnan(sg))
return 0;
if (isinf(sg))
return 1;
if (sg < REFORM_BEGIN_JD || sg > REFORM_END_JD)
return 0;
return 1;
}
inline static int
df_local_to_utc(int df, int of)
{
df -= of;
if (df < 0)
df += DAY_IN_SECONDS;
else if (df >= DAY_IN_SECONDS)
df -= DAY_IN_SECONDS;
return df;
}
inline static int
df_utc_to_local(int df, int of)
{
df += of;
if (df < 0)
df += DAY_IN_SECONDS;
else if (df >= DAY_IN_SECONDS)
df -= DAY_IN_SECONDS;
return df;
}
inline static int
jd_local_to_utc(int jd, int df, int of)
{
df -= of;
if (df < 0)
jd -= 1;
else if (df >= DAY_IN_SECONDS)
jd += 1;
return jd;
}
inline static int
jd_utc_to_local(int jd, int df, int of)
{
df += of;
if (df < 0)
jd -= 1;
else if (df >= DAY_IN_SECONDS)
jd += 1;
return jd;
}
inline static int
time_to_df(int h, int min, int s)
{
return h * HOUR_IN_SECONDS + min * MINUTE_IN_SECONDS + s;
}
inline static void
df_to_time(int df, int *h, int *min, int *s)
{
*h = df / HOUR_IN_SECONDS;
df %= HOUR_IN_SECONDS;
*min = df / MINUTE_IN_SECONDS;
*s = df % MINUTE_IN_SECONDS;
}
static VALUE
sec_to_day(VALUE s)
{
if (FIXNUM_P(s))
return rb_rational_new2(s, INT2FIX(DAY_IN_SECONDS));
return f_quo(s, INT2FIX(DAY_IN_SECONDS));
}
inline static VALUE
isec_to_day(int s)
{
return sec_to_day(INT2FIX(s));
}
static VALUE
ns_to_day(VALUE n)
{
if (FIXNUM_P(n))
return rb_rational_new2(n, day_in_nanoseconds);
return f_quo(n, day_in_nanoseconds);
}
#ifndef NDEBUG
/* :nodoc: */
static VALUE
ms_to_sec(VALUE m)
{
if (FIXNUM_P(m))
return rb_rational_new2(m, INT2FIX(SECOND_IN_MILLISECONDS));
return f_quo(m, INT2FIX(SECOND_IN_MILLISECONDS));
}
#endif
static VALUE
ns_to_sec(VALUE n)
{
if (FIXNUM_P(n))
return rb_rational_new2(n, INT2FIX(SECOND_IN_NANOSECONDS));
return f_quo(n, INT2FIX(SECOND_IN_NANOSECONDS));
}
#ifndef NDEBUG
/* :nodoc: */
inline static VALUE
ins_to_day(int n)
{
return ns_to_day(INT2FIX(n));