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/* Private header for tzdb code. */
#ifndef PRIVATE_H
#define PRIVATE_H
/*
* This file is in the public domain, so clarified as of
* 1996-06-05 by Arthur David Olson.
*
* IDENTIFICATION
* src/timezone/private.h
*/
/*
* This header is for use ONLY with the time conversion code.
* There is no guarantee that it will remain unchanged,
* or that it will remain at all.
* Do NOT copy it to any system include directory.
* Thank you!
*/
#include <limits.h> /* for CHAR_BIT et al. */
#include <sys/wait.h> /* for WIFEXITED and WEXITSTATUS */
#include <unistd.h> /* for F_OK and R_OK */
#include "pgtime.h"
/* This string was in the Factory zone through version 2016f. */
#define GRANDPARENTED "Local time zone must be set--see zic manual page"
/*
* IANA has a bunch of HAVE_FOO #defines here, but in PG we want pretty
* much all of that to be done by PG's configure script.
*/
#ifndef ENOTSUP
#define ENOTSUP EINVAL
#endif
#ifndef EOVERFLOW
#define EOVERFLOW EINVAL
#endif
/* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
#define is_digit(c) ((unsigned)(c) - '0' <= 9)
/* PG doesn't currently rely on <inttypes.h>, so work around strtoimax() */
#undef strtoimax
#define strtoimax strtoll
/*
* Finally, some convenience items.
*/
#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
#define TYPE_SIGNED(type) (((type) -1) < 0)
#define TWOS_COMPLEMENT(t) ((t) ~ (t) 0 < 0)
/*
* Max and min values of the integer type T, of which only the bottom
* B bits are used, and where the highest-order used bit is considered
* to be a sign bit if T is signed.
*/
#define MAXVAL(t, b) \
((t) (((t) 1 << ((b) - 1 - TYPE_SIGNED(t))) \
- 1 + ((t) 1 << ((b) - 1 - TYPE_SIGNED(t)))))
#define MINVAL(t, b) \
((t) (TYPE_SIGNED(t) ? - TWOS_COMPLEMENT(t) - MAXVAL(t, b) : 0))
/* The extreme time values, assuming no padding. */
#define TIME_T_MIN MINVAL(pg_time_t, TYPE_BIT(pg_time_t))
#define TIME_T_MAX MAXVAL(pg_time_t, TYPE_BIT(pg_time_t))
/*
* 302 / 1000 is log10(2.0) rounded up.
* Subtract one for the sign bit if the type is signed;
* add one for integer division truncation;
* add one more for a minus sign if the type is signed.
*/
#define INT_STRLEN_MAXIMUM(type) \
((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
1 + TYPE_SIGNED(type))
/*
* INITIALIZE(x)
*/
#define INITIALIZE(x) ((x) = 0)
#undef _
#define _(msgid) (msgid)
/* Handy macros that are independent of tzfile implementation. */
#define YEARSPERREPEAT 400 /* years before a Gregorian repeat */
#define SECSPERMIN 60
#define MINSPERHOUR 60
#define HOURSPERDAY 24
#define DAYSPERWEEK 7
#define DAYSPERNYEAR 365
#define DAYSPERLYEAR 366
#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
#define SECSPERDAY ((int32) SECSPERHOUR * HOURSPERDAY)
#define MONSPERYEAR 12
#define TM_SUNDAY 0
#define TM_MONDAY 1
#define TM_TUESDAY 2
#define TM_WEDNESDAY 3
#define TM_THURSDAY 4
#define TM_FRIDAY 5
#define TM_SATURDAY 6
#define TM_JANUARY 0
#define TM_FEBRUARY 1
#define TM_MARCH 2
#define TM_APRIL 3
#define TM_MAY 4
#define TM_JUNE 5
#define TM_JULY 6
#define TM_AUGUST 7
#define TM_SEPTEMBER 8
#define TM_OCTOBER 9
#define TM_NOVEMBER 10
#define TM_DECEMBER 11
#define TM_YEAR_BASE 1900
#define EPOCH_YEAR 1970
#define EPOCH_WDAY TM_THURSDAY
#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
/*
* Since everything in isleap is modulo 400 (or a factor of 400), we know that
* isleap(y) == isleap(y % 400)
* and so
* isleap(a + b) == isleap((a + b) % 400)
* or
* isleap(a + b) == isleap(a % 400 + b % 400)
* This is true even if % means modulo rather than Fortran remainder
* (which is allowed by C89 but not by C99 or later).
* We use this to avoid addition overflow problems.
*/
#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
/*
* The Gregorian year averages 365.2425 days, which is 31556952 seconds.
*/
#define AVGSECSPERYEAR 31556952L
#define SECSPERREPEAT \
((int64) YEARSPERREPEAT * (int64) AVGSECSPERYEAR)
#define SECSPERREPEAT_BITS 34 /* ceil(log2(SECSPERREPEAT)) */
#endif /* !defined PRIVATE_H */
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