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--- /dev/null
+++ Libc/Libc-1583.60.2/stdtime/FreeBSD/localtime.c
@@ -0,0 +1,2769 @@
+/*
+** This file is in the public domain, so clarified as of
+** 1996-06-05 by Arthur David Olson.
+*/
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunreachable-code"
+
+#include <sys/cdefs.h>
+#ifndef lint
+#ifndef NOID
+static char elsieid[] __unused = "@(#)localtime.c 8.14";
+#endif /* !defined NOID */
+#endif /* !defined lint */
+__FBSDID("$FreeBSD: head/contrib/tzcode/stdtime/localtime.c 289027 2015-10-08 11:42:15Z rodrigc $");
+
+/*
+** Leap second handling from Bradley White.
+** POSIX-style TZ environment variable handling from Guy Harris.
+*/
+
+/*LINTLIBRARY*/
+
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <time.h>
+#include <fcntl.h>
+#include <pthread.h>
+#ifdef NOTIFY_TZ
+//#define NOTIFY_TZ_DEBUG
+//#define NOTIFY_TZ_DEBUG_FILE "/var/log/localtime.debug"
+//#define NOTIFY_TZ_LOG "/var/log/localtime.log"
+/* force ALL_STATE if NOTIFY_TZ is set */
+#ifndef ALL_STATE
+#define ALL_STATE
+#endif /* ALL_STATE */
+#include <mach/mach_init.h>
+#include <notify.h>
+#include <alloca.h>
+#endif /* NOTIFY_TZ */
+#include "private.h"
+#include "un-namespace.h"
+
+#include "tzfile.h"
+#include "float.h" /* for FLT_MAX and DBL_MAX */
+
+#ifndef TZ_ABBR_MAX_LEN
+/* UNIX03 requires this to be the same as sysconf(_SC_TZNAME_MAX) */
+#define TZ_ABBR_MAX_LEN 255
+#endif /* !defined TZ_ABBR_MAX_LEN */
+
+#ifndef TZ_ABBR_CHAR_SET
+#define TZ_ABBR_CHAR_SET \
+ "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 :+-._"
+#endif /* !defined TZ_ABBR_CHAR_SET */
+
+#ifndef TZ_ABBR_ERR_CHAR
+#define TZ_ABBR_ERR_CHAR '_'
+#endif /* !defined TZ_ABBR_ERR_CHAR */
+
+#include "libc_private.h"
+
+#define _MUTEX_LOCK(x) if (__isthreaded) _pthread_mutex_lock(x)
+#define _MUTEX_UNLOCK(x) if (__isthreaded) _pthread_mutex_unlock(x)
+
+#define _RWLOCK_RDLOCK(x) \
+ do { \
+ if (__isthreaded) _pthread_rwlock_rdlock(x); \
+ } while (0)
+
+#define _RWLOCK_WRLOCK(x) \
+ do { \
+ if (__isthreaded) _pthread_rwlock_wrlock(x); \
+ } while (0)
+
+#define _RWLOCK_UNLOCK(x) \
+ do { \
+ if (__isthreaded) _pthread_rwlock_unlock(x); \
+ } while (0)
+
+/*
+** SunOS 4.1.1 headers lack O_BINARY.
+*/
+
+#ifdef O_BINARY
+#define OPEN_MODE (O_RDONLY | O_BINARY)
+#endif /* defined O_BINARY */
+#ifndef O_BINARY
+#define OPEN_MODE O_RDONLY
+#endif /* !defined O_BINARY */
+
+#ifndef WILDABBR
+/*
+** Someone might make incorrect use of a time zone abbreviation:
+** 1. They might reference tzname[0] before calling tzset (explicitly
+** or implicitly).
+** 2. They might reference tzname[1] before calling tzset (explicitly
+** or implicitly).
+** 3. They might reference tzname[1] after setting to a time zone
+** in which Daylight Saving Time is never observed.
+** 4. They might reference tzname[0] after setting to a time zone
+** in which Standard Time is never observed.
+** 5. They might reference tm.TM_ZONE after calling offtime.
+** What's best to do in the above cases is open to debate;
+** for now, we just set things up so that in any of the five cases
+** WILDABBR is used. Another possibility: initialize tzname[0] to the
+** string "tzname[0] used before set", and similarly for the other cases.
+** And another: initialize tzname[0] to "ERA", with an explanation in the
+** manual page of what this "time zone abbreviation" means (doing this so
+** that tzname[0] has the "normal" length of three characters).
+*/
+#define WILDABBR " "
+#endif /* !defined WILDABBR */
+
+__used static const char wildabbr[] = WILDABBR;
+
+/*
+ * In June 2004 it was decided UTC was a more appropriate default time
+ * zone than GMT.
+ */
+
+__used static const char gmt[] = "UTC";
+
+/*
+** The DST rules to use if TZ has no rules and we can't load TZDEFRULES.
+** We default to US rules as of 1999-08-17.
+** POSIX 1003.1 section 8.1.1 says that the default DST rules are
+** implementation dependent; for historical reasons, US rules are a
+** common default.
+*/
+#ifndef TZDEFRULESTRING
+#define TZDEFRULESTRING ",M4.1.0,M10.5.0"
+#endif /* !defined TZDEFDST */
+
+struct ttinfo { /* time type information */
+ long tt_gmtoff; /* UTC offset in seconds */
+ int tt_isdst; /* used to set tm_isdst */
+ int tt_abbrind; /* abbreviation list index */
+ int tt_ttisstd; /* TRUE if transition is std time */
+ int tt_ttisgmt; /* TRUE if transition is UTC */
+};
+
+struct lsinfo { /* leap second information */
+ time_t ls_trans; /* transition time */
+ long ls_corr; /* correction to apply */
+};
+
+#define BIGGEST(a, b) (((a) > (b)) ? (a) : (b))
+
+#ifdef TZNAME_MAX
+#define MY_TZNAME_MAX TZNAME_MAX
+#endif /* defined TZNAME_MAX */
+#ifndef TZNAME_MAX
+#define MY_TZNAME_MAX 255
+#endif /* !defined TZNAME_MAX */
+
+struct state {
+ int leapcnt;
+ int timecnt;
+ int typecnt;
+ int charcnt;
+ int goback;
+ int goahead;
+ time_t ats[TZ_MAX_TIMES];
+ unsigned char types[TZ_MAX_TIMES];
+ struct ttinfo ttis[TZ_MAX_TYPES];
+ char chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, sizeof gmt),
+ (2 * (MY_TZNAME_MAX + 1)))];
+ struct lsinfo lsis[TZ_MAX_LEAPS];
+};
+
+struct rule {
+ int r_type; /* type of rule--see below */
+ int r_day; /* day number of rule */
+ int r_week; /* week number of rule */
+ int r_mon; /* month number of rule */
+ long r_time; /* transition time of rule */
+};
+
+#define JULIAN_DAY 0 /* Jn - Julian day */
+#define DAY_OF_YEAR 1 /* n - day of year */
+#define MONTH_NTH_DAY_OF_WEEK 2 /* Mm.n.d - month, week, day of week */
+
+#ifdef NOTIFY_TZ
+typedef struct {
+ int token;
+ int is_set;
+} notify_tz_t;
+
+#define NOTIFY_TZ_NAME "com.apple.system.timezone"
+#endif /* NOTIFY_TZ */
+
+/*
+** Prototypes for static functions.
+*/
+#define localsub _st_localsub
+#define time1 _st_time1
+#define tzset_basic _st_tzset_basic
+__private_extern__
+#ifdef __LP64__
+struct tm * localsub(const time_t * timep, long offset,
+ struct tm * tmp);
+#else /* !__LP64__ */
+void localsub(const time_t * timep, long offset,
+ struct tm * tmp);
+#endif /* __LP64__ */
+__private_extern__
+time_t time1(struct tm * tmp,
+#ifdef __LP64__
+ struct tm *(*funcp) (const time_t *,
+ long, struct tm *),
+#else /* !__LP64__ */
+ void(*funcp) (const time_t *,
+ long, struct tm *),
+#endif /* __LP64__ */
+ long offset,
+ int unix03);
+__private_extern__
+void tzset_basic(int);
+
+#if !BUILDING_VARIANT
+static long detzcode(const char * codep);
+static time_t detzcode64(const char * codep);
+static int differ_by_repeat(time_t t1, time_t t0);
+static const char * getzname(const char * strp, char **name, size_t *len);
+static const char * getqzname(const char * strp, const int delim)
+ ATTRIBUTE_PURE;
+static const char * getnum(const char * strp, int * nump, int min,
+ int max);
+static const char * getsecs(const char * strp, long * secsp);
+static const char * getoffset(const char * strp, long * offsetp);
+static const char * getrule(const char * strp, struct rule * rulep);
+#ifdef NOTIFY_TZ
+static void gmtload(struct state * sp, char *path);
+#else /* ! NOTIFY_TZ */
+static void gmtload(struct state * sp);
+#endif /* NOTIFY_TZ */
+#ifdef __LP64__
+static struct tm * gmtsub(const time_t * timep, long offset,
+ struct tm * tmp);
+#else /* !__LP64__ */
+static void gmtsub(const time_t * timep, long offset,
+ struct tm * tmp);
+#endif /* __LP64__ */
+static int increment_overflow(int * number, int delta);
+static int leaps_thru_end_of(int y) ATTRIBUTE_PURE;
+static int long_increment_overflow(long * number, int delta);
+static int long_normalize_overflow(long * tensptr,
+ int * unitsptr, int base);
+static int normalize_overflow(int * tensptr, int * unitsptr,
+ int base);
+#ifdef NOTIFY_TZ
+static void notify_check_tz(notify_tz_t *p);
+static void notify_register_tz(char *file, notify_tz_t *p);
+#endif /* NOTIFY_TZ */
+static void settzname(void);
+static time_t time2(struct tm *tmp,
+#ifdef __LP64__
+ struct tm *(*funcp) (const time_t *,
+ long, struct tm*),
+#else /* !__LP64__ */
+ void(*funcp) (const time_t *,
+ long, struct tm*),
+#endif /* __LP64__ */
+ long offset, int * okayp, int unix03);
+static time_t time2sub(struct tm *tmp,
+#ifdef __LP64__
+ struct tm *(*funcp) (const time_t *,
+ long, struct tm*),
+#else /* !__LP64__ */
+ void(*funcp) (const time_t *,
+ long, struct tm*),
+#endif /* __LP64__ */
+ long offset, int * okayp, int do_norm_secs,
+ int unix03);
+#ifdef __LP64__
+static struct tm * timesub(const time_t * timep, long offset,
+ const struct state * sp, struct tm * tmp);
+#else /* !__LP64__ */
+static void timesub(const time_t * timep, long offset,
+ const struct state * sp, struct tm * tmp);
+#endif /* __LP64__ */
+static int tmcomp(const struct tm * atmp,
+ const struct tm * btmp);
+static time_t transtime(time_t janfirst, int year,
+ const struct rule * rulep, long offset)
+ ATTRIBUTE_PURE;
+static int typesequiv(const struct state * sp, int a, int b);
+#ifdef NOTIFY_TZ
+static int tzload(const char * name, struct state * sp, char *path, int doextend);
+#else /* ! NOTIFY_TZ */
+static int tzload(const char * name, struct state * sp, int doextend);
+#endif /* NOTIFY_TZ */
+static int tzparse(const char * name, struct state * sp,
+ int lastditch);
+
+#ifdef ALL_STATE
+static struct state * lclptr;
+static struct state * gmtptr;
+#endif /* defined ALL_STATE */
+
+#ifndef ALL_STATE
+static struct state lclmem;
+static struct state gmtmem;
+#define lclptr (&lclmem)
+#define gmtptr (&gmtmem)
+#endif /* State Farm */
+
+#ifndef TZ_STRLEN_MAX
+#define TZ_STRLEN_MAX 255
+#endif /* !defined TZ_STRLEN_MAX */
+
+static char lcl_TZname[TZ_STRLEN_MAX + 1];
+#ifdef NOTIFY_TZ
+#define lcl_is_set (lcl_notify.is_set)
+#define gmt_is_set (gmt_notify.is_set)
+#else /* ! NOTIFY_TZ */
+static int lcl_is_set;
+#endif /* NOTIFY_TZ */
+static pthread_once_t gmt_once = PTHREAD_ONCE_INIT;
+__private_extern__ pthread_rwlock_t lcl_rwlock = PTHREAD_RWLOCK_INITIALIZER;
+static pthread_once_t gmtime_once = PTHREAD_ONCE_INIT;
+static pthread_key_t gmtime_key;
+static int gmtime_key_error;
+static pthread_once_t localtime_once = PTHREAD_ONCE_INIT;
+static pthread_key_t localtime_key;
+static int localtime_key_error;
+
+char * tzname[2] = {
+ (char *)wildabbr,
+ (char *)wildabbr
+};
+
+/*
+** Section 4.12.3 of X3.159-1989 requires that
+** Except for the strftime function, these functions [asctime,
+** ctime, gmtime, localtime] return values in one of two static
+** objects: a broken-down time structure and an array of char.
+** Thanks to Paul Eggert for noting this.
+*/
+
+static struct tm tm;
+
+#define USG_COMPAT
+#define ALTZONE
+#ifdef USG_COMPAT
+int daylight = 0;
+__private_extern__ void _st_set_timezone(long);
+#endif /* defined USG_COMPAT */
+
+#ifdef ALTZONE
+__private_extern__ long __darwin_altzone = 0;
+#define altzone __darwin_altzone
+#endif /* defined ALTZONE */
+
+#ifdef NOTIFY_TZ
+#ifdef NOTIFY_TZ_DEBUG
+#ifdef NOTIFY_TZ_DEBUG_FILE
+#define NOTIFY_TZ_PRINTF(fmt, args...) \
+{ \
+ FILE *_notify_tz_fp_; \
+ if((_notify_tz_fp_ = fopen(NOTIFY_TZ_DEBUG_FILE, "a")) != NULL) { \
+ fprintf(_notify_tz_fp_, "%d: " fmt, getpid(), ## args); \
+ fclose(_notify_tz_fp_); \
+ } \
+}
+#else /* ! NOTIFY_TZ_DEBUG_FILE */
+#define NOTIFY_TZ_PRINTF(args...) fprintf(stdout, ## args)
+#endif /* NOTIFY_TZ_DEBUG_FILE */
+#endif /* NOTIFY_TZ_DEBUG */
+#ifdef NOTIFY_TZ_LOG
+#define NOTIFY_LOG(fmt, args...) \
+{ \
+ FILE *_notify_log_fp_; \
+ if((_notify_log_fp_ = fopen(NOTIFY_TZ_LOG, "a")) != NULL) { \
+ fprintf(_notify_log_fp_, "%d: " fmt, getpid(), ## args); \
+ fclose(_notify_log_fp_); \
+ } \
+}
+#endif /* NOTIFY_TZ_LOG */
+
+static notify_tz_t gmt_notify = {-1, 0};
+static notify_tz_t lcl_notify = {-1, 0};
+static const char notify_tz_name[] = NOTIFY_TZ_NAME;
+#endif /* NOTIFY_TZ */
+
+static long
+detzcode(const char *const codep)
+{
+ long result;
+ int i;
+
+ result = (codep[0] & 0x80) ? ~0L : 0;
+ for (i = 0; i < 4; ++i)
+ result = (result << 8) | (codep[i] & 0xff);
+ return result;
+}
+
+static time_t
+detzcode64(const char *const codep)
+{
+ register time_t result;
+ register int i;
+
+ result = (codep[0] & 0x80) ? (~(int_fast64_t) 0) : 0;
+ for (i = 0; i < 8; ++i)
+ result = result * 256 + (codep[i] & 0xff);
+ return result;
+}
+
+static void
+settzname(void)
+{
+ struct state * sp = lclptr;
+ int i, need;
+ unsigned char * types;
+#define NEED_STD 1
+#define NEED_DST 2
+#define NEED_DAYLIGHT 4
+#define NEED_ALL (NEED_STD | NEED_DST | NEED_DAYLIGHT)
+
+ tzname[0] = (char *)wildabbr;
+ tzname[1] = (char *)wildabbr;
+#ifdef USG_COMPAT
+ daylight = 0;
+ _st_set_timezone(0);
+#endif /* defined USG_COMPAT */
+#ifdef ALTZONE
+ altzone = 0;
+#endif /* defined ALTZONE */
+#ifdef ALL_STATE
+ if (sp == NULL) {
+ tzname[0] = tzname[1] = (char *)gmt;
+ return;
+ }
+#endif /* defined ALL_STATE */
+ /*
+ * PR-3765457: The original settzname went sequentially through the ttis
+ * array, rather than correctly indexing via the types array, to get
+ * the real order of the timezone changes. In addition, as a speed up,
+ * we start at the end of the changes, and work back, so that most of
+ * the time, we don't have to look through the entire array.
+ */
+ if (sp->timecnt == 0 && sp->typecnt == 1) {
+ /*
+ * Unfortunately, there is an edge case when typecnt == 1 and
+ * timecnt == 0, which would cause the loop to never run. So
+ * in that case, we fudge things up so that it is as if
+ * timecnt == 1.
+ */
+ i = 0;
+ types = (unsigned char *)""; /* we use the null as index */
+ } else {
+ /* the usual case */
+ i = sp->timecnt - 1;
+ types = sp->types;
+ }
+ need = NEED_ALL;
+ for (; i >= 0 && need; --i) {
+ const struct ttinfo * const ttisp = &sp->ttis[types[i]];
+
+#ifdef USG_COMPAT
+ if ((need & NEED_DAYLIGHT) && ttisp->tt_isdst) {
+ need &= ~NEED_DAYLIGHT;
+ daylight = 1;
+ }
+#endif /* defined USG_COMPAT */
+ if (ttisp->tt_isdst) {
+ if (need & NEED_DST) {
+ need &= ~NEED_DST;
+ tzname[1] = &sp->chars[ttisp->tt_abbrind];
+#ifdef ALTZONE
+ altzone = -(ttisp->tt_gmtoff);
+#endif /* defined ALTZONE */
+ }
+ } else if (need & NEED_STD) {
+ need &= ~NEED_STD;
+ tzname[0] = &sp->chars[ttisp->tt_abbrind];
+#ifdef USG_COMPAT
+ _st_set_timezone(-(ttisp->tt_gmtoff));
+#endif /* defined USG_COMPAT */
+ }
+#if defined(ALTZONE) || defined(USG_COMPAT)
+ if (i == 0) {
+#endif /* defined(ALTZONE) || defined(USG_COMPAT) */
+#ifdef ALTZONE
+ if (need & NEED_DST)
+ altzone = -(ttisp->tt_gmtoff);
+#endif /* defined ALTZONE */
+#ifdef USG_COMPAT
+ if (need & NEED_STD)
+ _st_set_timezone(-(ttisp->tt_gmtoff));
+#endif /* defined USG_COMPAT */
+#if defined(ALTZONE) || defined(USG_COMPAT)
+ }
+#endif /* defined(ALTZONE) || defined(USG_COMPAT) */
+ }
+ /*
+ ** Finally, scrub the abbreviations.
+ ** First, replace bogus characters.
+ */
+ for (i = 0; i < sp->charcnt; ++i)
+ if (strchr(TZ_ABBR_CHAR_SET, sp->chars[i]) == NULL)
+ sp->chars[i] = TZ_ABBR_ERR_CHAR;
+ /*
+ ** Second, truncate long abbreviations.
+ */
+ for (i = 0; i < sp->typecnt; ++i) {
+ register const struct ttinfo * const ttisp = &sp->ttis[i];
+ register char * cp = &sp->chars[ttisp->tt_abbrind];
+
+ if (strlen(cp) > TZ_ABBR_MAX_LEN &&
+ strcmp(cp, GRANDPARENTED) != 0)
+ *(cp + TZ_ABBR_MAX_LEN) = '\0';
+ }
+}
+
+#ifdef NOTIFY_TZ
+static void
+notify_check_tz(notify_tz_t *p)
+{
+ unsigned int nstat;
+ int ncheck;
+
+ if (p->token < 0)
+ return;
+ nstat = notify_check(p->token, &ncheck);
+ if (nstat || ncheck) {
+ p->is_set = 0;
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("notify_check_tz: %s changed\n", (p == &lcl_notify) ? "lcl" : "gmt");
+#endif /* NOTIFY_TZ_DEBUG */
+ }
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("notify_check_tz: %s unchanged\n", (p == &lcl_notify) ? "lcl" : "gmt");
+#endif /* NOTIFY_TZ_DEBUG */
+}
+
+extern uint32_t notify_monitor_file(int token, char *path, int flags);
+
+static void
+notify_register_tz(char *file, notify_tz_t *p)
+{
+ char *name;
+ unsigned int nstat;
+ int ncheck;
+
+ if (bootstrap_port == MACH_PORT_NULL) {
+ /* error handling below resets is_set, we don't want that */
+ return;
+ }
+
+ /*----------------------------------------------------------------
+ * Since we don't record the last time zone filename, just cancel
+ * (which should remove the file monitor) and setup from scratch
+ *----------------------------------------------------------------*/
+ if (p->token >= 0)
+ notify_cancel(p->token);
+ if (!file || *file == 0) {
+ /* no time zone file to monitor */
+ p->token = -1;
+ return;
+ }
+ /*----------------------------------------------------------------
+ * Just use com.apple.system.timezone if the path is /etc/localtime.
+ * Otherwise use com.apple.system.timezone.<fullpath>
+ *----------------------------------------------------------------*/
+ if (TZDEFAULT && strcmp(file, TZDEFAULT) == 0)
+ name = (char *)notify_tz_name;
+ else {
+ name = alloca(sizeof(notify_tz_name) + strlen(file) + 1);
+ if (name == NULL) {
+ p->token = -1;
+ return;
+ }
+ strcpy(name, notify_tz_name);
+ strcat(name, ".");
+ strcat(name, file);
+ }
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("notify_register_tz: file=%s name=%s\n", file, name);
+#endif /* NOTIFY_TZ_DEBUG */
+ nstat = notify_register_check(name, &p->token);
+ if (nstat != 0) {
+ p->token = -1;
+ p->is_set = 0;
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("***notify_register_tz: notify_register_check failed: %u\n", nstat);
+#endif /* NOTIFY_TZ_DEBUG */
+#ifdef NOTIFY_TZ_LOG
+ NOTIFY_LOG("notify_register_check(%s) failed: %u\n", name, nstat);
+#endif /* NOTIFY_TZ_LOG */
+ return;
+ }
+ /* don't need to request monitoring /etc/localtime */
+ if (name != notify_tz_name) {
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("notify_register_tz: monitor %s\n", file);
+#endif /* NOTIFY_TZ_DEBUG */
+ nstat = notify_monitor_file(p->token, file, 0);
+ if (nstat != 0) {
+ notify_cancel(p->token);
+ p->token = -1;
+ p->is_set = 0;
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("***notify_register_tz: notify_monitor_file failed: %u\n", nstat);
+#endif /* NOTIFY_TZ_DEBUG */
+#ifdef NOTIFY_TZ_LOG
+ NOTIFY_LOG("notify_monitor_file(%s) failed: %u\n", file, nstat);
+#endif /* NOTIFY_TZ_LOG */
+ return;
+ }
+ }
+ notify_check(p->token, &ncheck); /* this always returns true */
+}
+#endif /* NOTIFY_TZ */
+
+static int
+differ_by_repeat(const time_t t1, const time_t t0)
+{
+ int_fast64_t _t0 = t0;
+ int_fast64_t _t1 = t1;
+
+ if (TYPE_INTEGRAL(time_t) &&
+ TYPE_BIT(time_t) - TYPE_SIGNED(time_t) < SECSPERREPEAT_BITS)
+ return 0;
+ //turn ((int_fast64_t)(t1 - t0) == SECSPERREPEAT);
+ return _t1 - _t0 == SECSPERREPEAT;
+}
+
+static int
+#ifdef NOTIFY_TZ
+tzload(const char *name, struct state * const sp, char *path,
+ register const int doextend)
+#else /* ! NOTIFY_TZ */
+tzload(const char *name, struct state * const sp, register const int doextend)
+#endif /* NOTIFY_TZ */
+{
+ const char * p;
+ int i;
+ int fid;
+ int stored;
+ int nread;
+ int res;
+ union {
+ struct tzhead tzhead;
+ char buf[2 * sizeof(struct tzhead) +
+ 2 * sizeof *sp +
+ 4 * TZ_MAX_TIMES];
+ } *u;
+
+ u = NULL;
+ res = -1;
+ sp->goback = sp->goahead = FALSE;
+
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("tzload: name=%s\n", name);
+#endif /* NOTIFY_TZ_DEBUG */
+ /* XXX The following is from OpenBSD, and I'm not sure it is correct */
+ if (name != NULL && issetugid() != 0)
+ if ((name[0] == ':' && name[1] == '/') ||
+ name[0] == '/' || strchr(name, '.'))
+ name = NULL;
+#ifdef NOTIFY_TZ
+ if (path)
+ *path = 0; /* default to empty string on error */
+#endif /* NOTIFY_TZ */
+ if (name == NULL && (name = TZDEFAULT) == NULL)
+ return -1;
+ {
+ int doaccess;
+ struct stat stab;
+ /*
+ ** Section 4.9.1 of the C standard says that
+ ** "FILENAME_MAX expands to an integral constant expression
+ ** that is the size needed for an array of char large enough
+ ** to hold the longest file name string that the implementation
+ ** guarantees can be opened."
+ */
+ char *fullname;
+
+ fullname = malloc(FILENAME_MAX + 1);
+ if (fullname == NULL)
+ goto out;
+
+ if (name[0] == ':')
+ ++name;
+ doaccess = name[0] == '/';
+ if (!doaccess) {
+ if ((p = TZDIR) == NULL) {
+ free(fullname);
+ return -1;
+ }
+ if (strlen(p) + 1 + strlen(name) >= FILENAME_MAX) {
+ free(fullname);
+ return -1;
+ }
+ (void) strcpy(fullname, p);
+ (void) strcat(fullname, "/");
+ (void) strcat(fullname, name);
+ /*
+ ** Set doaccess if '.' (as in "../") shows up in name.
+ */
+ if (strchr(name, '.') != NULL)
+ doaccess = TRUE;
+ name = fullname;
+ }
+#ifdef NOTIFY_TZ
+ if (path) {
+ if (strlen(name) > FILENAME_MAX)
+ return -1;
+ strcpy(path, name);
+ }
+#endif /* NOTIFY_TZ */
+ if (doaccess && access(name, R_OK) != 0) {
+ free(fullname);
+ return -1;
+ }
+ if ((fid = _open(name, OPEN_MODE)) == -1) {
+ free(fullname);
+ return -1;
+ }
+ if ((_fstat(fid, &stab) < 0) || !S_ISREG(stab.st_mode)) {
+ free(fullname);
+ _close(fid);
+ return -1;
+ }
+ free(fullname);
+ }
+ u = malloc(sizeof(*u));
+ if (u == NULL)
+ goto out;
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("tzload: reading %s\n", name);
+#endif /* NOTIFY_TZ_DEBUG */
+ nread = _read(fid, u->buf, sizeof u->buf);
+ if (_close(fid) < 0 || nread <= 0)
+ goto out;
+ for (stored = 4; stored <= 8; stored *= 2) {
+ int ttisstdcnt;
+ int ttisgmtcnt;
+
+ ttisstdcnt = (int) detzcode(u->tzhead.tzh_ttisstdcnt);
+ ttisgmtcnt = (int) detzcode(u->tzhead.tzh_ttisgmtcnt);
+ sp->leapcnt = (int) detzcode(u->tzhead.tzh_leapcnt);
+ sp->timecnt = (int) detzcode(u->tzhead.tzh_timecnt);
+ sp->typecnt = (int) detzcode(u->tzhead.tzh_typecnt);
+ sp->charcnt = (int) detzcode(u->tzhead.tzh_charcnt);
+ p = u->tzhead.tzh_charcnt + sizeof u->tzhead.tzh_charcnt;
+ if (sp->leapcnt < 0 || sp->leapcnt > TZ_MAX_LEAPS ||
+ sp->typecnt <= 0 || sp->typecnt > TZ_MAX_TYPES ||
+ sp->timecnt < 0 || sp->timecnt > TZ_MAX_TIMES ||
+ sp->charcnt < 0 || sp->charcnt > TZ_MAX_CHARS ||
+ (ttisstdcnt != sp->typecnt && ttisstdcnt != 0) ||
+ (ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0))
+ goto out;
+ if (nread - (p - u->buf) <
+ sp->timecnt * stored + /* ats */
+ sp->timecnt + /* types */
+ sp->typecnt * 6 + /* ttinfos */
+ sp->charcnt + /* chars */
+ sp->leapcnt * (stored + 4) + /* lsinfos */
+ ttisstdcnt + /* ttisstds */
+ ttisgmtcnt) /* ttisgmts */
+ goto out;
+ for (i = 0; i < sp->timecnt; ++i) {
+ sp->ats[i] = (stored == 4) ?
+ detzcode(p) : detzcode64(p);
+ p += stored;
+ }
+ for (i = 0; i < sp->timecnt; ++i) {
+ sp->types[i] = (unsigned char) *p++;
+ if (sp->types[i] >= sp->typecnt)
+ goto out;
+ }
+ for (i = 0; i < sp->typecnt; ++i) {
+ struct ttinfo * ttisp;
+
+ ttisp = &sp->ttis[i];
+ ttisp->tt_gmtoff = detzcode(p);
+ p += 4;
+ ttisp->tt_isdst = (unsigned char) *p++;
+ if (ttisp->tt_isdst != 0 && ttisp->tt_isdst != 1)
+ goto out;
+ ttisp->tt_abbrind = (unsigned char) *p++;
+ if (ttisp->tt_abbrind < 0 ||
+ ttisp->tt_abbrind > sp->charcnt)
+ goto out;
+ }
+ for (i = 0; i < sp->charcnt; ++i)
+ sp->chars[i] = *p++;
+ sp->chars[i] = '\0'; /* ensure '\0' at end */
+ for (i = 0; i < sp->leapcnt; ++i) {
+ struct lsinfo * lsisp;
+
+ lsisp = &sp->lsis[i];
+ lsisp->ls_trans = (stored == 4) ?
+ detzcode(p) : detzcode64(p);
+ p += stored;
+ lsisp->ls_corr = detzcode(p);
+ p += 4;
+ }
+ for (i = 0; i < sp->typecnt; ++i) {
+ struct ttinfo * ttisp;
+
+ ttisp = &sp->ttis[i];
+ if (ttisstdcnt == 0)
+ ttisp->tt_ttisstd = FALSE;
+ else {
+ ttisp->tt_ttisstd = *p++;
+ if (ttisp->tt_ttisstd != TRUE &&
+ ttisp->tt_ttisstd != FALSE)
+ goto out;
+ }
+ }
+ for (i = 0; i < sp->typecnt; ++i) {
+ struct ttinfo * ttisp;
+
+ ttisp = &sp->ttis[i];
+ if (ttisgmtcnt == 0)
+ ttisp->tt_ttisgmt = FALSE;
+ else {
+ ttisp->tt_ttisgmt = *p++;
+ if (ttisp->tt_ttisgmt != TRUE &&
+ ttisp->tt_ttisgmt != FALSE)
+ goto out;
+ }
+ }
+ /*
+ ** Out-of-sort ats should mean we're running on a
+ ** signed time_t system but using a data file with
+ ** unsigned values (or vice versa).
+ */
+ for (i = 0; i < sp->timecnt - 2; ++i)
+ if (sp->ats[i] > sp->ats[i + 1]) {
+ ++i;
+ if (TYPE_SIGNED(time_t)) {
+ /*
+ ** Ignore the end (easy).
+ */
+ sp->timecnt = i;
+ } else {
+ /*
+ ** Ignore the beginning (harder).
+ */
+ register int j;
+
+ for (j = 0; j + i < sp->timecnt; ++j) {
+ sp->ats[j] = sp->ats[j + i];
+ sp->types[j] = sp->types[j + i];
+ }
+ sp->timecnt = j;
+ }
+ break;
+ }
+ /*
+ ** If this is an old file, we're done.
+ */
+ if (u->tzhead.tzh_version[0] == '\0')
+ break;
+ nread -= p - u->buf;
+ for (i = 0; i < nread; ++i)
+ u->buf[i] = p[i];
+ /*
+ ** If this is a narrow integer time_t system, we're done.
+ */
+ if (stored >= (int) sizeof(time_t) && TYPE_INTEGRAL(time_t))
+ break;
+ }
+ if (doextend && nread > 2 &&
+ u->buf[0] == '\n' && u->buf[nread - 1] == '\n' &&
+ sp->typecnt + 2 <= TZ_MAX_TYPES) {
+ struct state *ts;
+ register int result;
+
+ ts = malloc(sizeof(*ts));
+ if (ts == NULL)
+ goto out;
+ u->buf[nread - 1] = '\0';
+ result = tzparse(&u->buf[1], ts, FALSE);
+ if (result == 0 && ts->typecnt == 2 &&
+ sp->charcnt + ts->charcnt <= TZ_MAX_CHARS) {
+ for (i = 0; i < 2; ++i)
+ ts->ttis[i].tt_abbrind +=
+ sp->charcnt;
+ for (i = 0; i < ts->charcnt; ++i)
+ sp->chars[sp->charcnt++] =
+ ts->chars[i];
+ i = 0;
+ while (i < ts->timecnt &&
+ ts->ats[i] <=
+ sp->ats[sp->timecnt - 1])
+ ++i;
+ while (i < ts->timecnt &&
+ sp->timecnt < TZ_MAX_TIMES) {
+ sp->ats[sp->timecnt] =
+ ts->ats[i];
+ sp->types[sp->timecnt] =
+ sp->typecnt +
+ ts->types[i];
+ ++sp->timecnt;
+ ++i;
+ }
+ sp->ttis[sp->typecnt++] = ts->ttis[0];
+ sp->ttis[sp->typecnt++] = ts->ttis[1];
+ }
+ free(ts);
+ }
+ if (sp->timecnt > 1) {
+ for (i = 1; i < sp->timecnt; ++i)
+ if (typesequiv(sp, sp->types[i], sp->types[0]) &&
+ differ_by_repeat(sp->ats[i], sp->ats[0])) {
+ sp->goback = TRUE;
+ break;
+ }
+ for (i = sp->timecnt - 2; i >= 0; --i)
+ if (typesequiv(sp, sp->types[sp->timecnt - 1],
+ sp->types[i]) &&
+ differ_by_repeat(sp->ats[sp->timecnt - 1],
+ sp->ats[i])) {
+ sp->goahead = TRUE;
+ break;
+ }
+ }
+ res = 0;
+out:
+ free(u);
+ return (res);
+}
+
+static int
+typesequiv(const struct state * const sp, const int a, const int b)
+{
+ register int result;
+
+ if (sp == NULL ||
+ a < 0 || a >= sp->typecnt ||
+ b < 0 || b >= sp->typecnt)
+ result = FALSE;
+ else {
+ register const struct ttinfo * ap = &sp->ttis[a];
+ register const struct ttinfo * bp = &sp->ttis[b];
+ result = ap->tt_gmtoff == bp->tt_gmtoff &&
+ ap->tt_isdst == bp->tt_isdst &&
+ ap->tt_ttisstd == bp->tt_ttisstd &&
+ ap->tt_ttisgmt == bp->tt_ttisgmt &&
+ strcmp(&sp->chars[ap->tt_abbrind],
+ &sp->chars[bp->tt_abbrind]) == 0;
+ }
+ return result;
+}
+
+static const int mon_lengths[2][MONSPERYEAR] = {
+ { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
+ { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+};
+
+static const int year_lengths[2] = {
+ DAYSPERNYEAR, DAYSPERLYEAR
+};
+
+/*
+** Given a pointer into a time zone string, scan until a character that is not
+** a valid character in a zone name is found. Return a pointer to that
+** character.
+*/
+
+static const char *
+getzname(const char *strp, char **name, size_t *len)
+{
+ char c;
+ char * ket;
+
+ if (*strp == '<' && (ket = strchr(strp, '>')) != NULL) {
+ *name = (char *)(strp + 1);
+ *len = ket - strp - 1;
+ return ket + 1;
+ }
+ *name = (char *)strp;
+ while ((c = *strp) != '\0' && !is_digit(c) && c != ',' && c != '-' &&
+ c != '+')
+ ++strp;
+ *len = strp - *name;
+ return strp;
+}
+
+/*
+** Given a pointer into an extended time zone string, scan until the ending
+** delimiter of the zone name is located. Return a pointer to the delimiter.
+**
+** As with getzname above, the legal character set is actually quite
+** restricted, with other characters producing undefined results.
+** We don't do any checking here; checking is done later in common-case code.
+*/
+
+static const char *
+getqzname(register const char *strp, const int delim)
+{
+ register int c;
+
+ while ((c = *strp) != '\0' && c != delim)
+ ++strp;
+ return strp;
+}
+
+/*
+** Given a pointer into a time zone string, extract a number from that string.
+** Check that the number is within a specified range; if it is not, return
+** NULL.
+** Otherwise, return a pointer to the first character not part of the number.
+*/
+
+static const char *
+getnum(const char *strp, int * const nump, const int min, const int max)
+{
+ char c;
+ int num;
+
+ if (strp == NULL || !is_digit(c = *strp))
+ return NULL;
+ num = 0;
+ do {
+ num = num * 10 + (c - '0');
+ if (num > max)
+ return NULL; /* illegal value */
+ c = *++strp;
+ } while (is_digit(c));
+ if (num < min)
+ return NULL; /* illegal value */
+ *nump = num;
+ return strp;
+}
+
+/*
+** Given a pointer into a time zone string, extract a number of seconds,
+** in hh[:mm[:ss]] form, from the string.
+** If any error occurs, return NULL.
+** Otherwise, return a pointer to the first character not part of the number
+** of seconds.
+*/
+
+static const char *
+getsecs(const char *strp, long * const secsp)
+{
+ int num;
+
+ /*
+ ** `HOURSPERDAY * DAYSPERWEEK - 1' allows quasi-Posix rules like
+ ** "M10.4.6/26", which does not conform to Posix,
+ ** but which specifies the equivalent of
+ ** ``02:00 on the first Sunday on or after 23 Oct''.
+ */
+ strp = getnum(strp, &num, 0, HOURSPERDAY * DAYSPERWEEK - 1);
+ if (strp == NULL)
+ return NULL;
+ *secsp = num * (long) SECSPERHOUR;
+ if (*strp == ':') {
+ ++strp;
+ strp = getnum(strp, &num, 0, MINSPERHOUR - 1);
+ if (strp == NULL)
+ return NULL;
+ *secsp += num * SECSPERMIN;
+ if (*strp == ':') {
+ ++strp;
+ /* `SECSPERMIN' allows for leap seconds. */
+ strp = getnum(strp, &num, 0, SECSPERMIN);
+ if (strp == NULL)
+ return NULL;
+ *secsp += num;
+ }
+ }
+ return strp;
+}
+
+/*
+** Given a pointer into a time zone string, extract an offset, in
+** [+-]hh[:mm[:ss]] form, from the string.
+** If any error occurs, return NULL.
+** Otherwise, return a pointer to the first character not part of the time.
+*/
+
+static const char *
+getoffset(const char *strp, long * const offsetp)
+{
+ int neg = 0;
+
+ if (*strp == '-') {
+ neg = 1;
+ ++strp;
+ } else if (*strp == '+')
+ ++strp;
+ strp = getsecs(strp, offsetp);
+ if (strp == NULL)
+ return NULL; /* illegal time */
+ if (neg)
+ *offsetp = -*offsetp;
+ return strp;
+}
+
+/*
+** Given a pointer into a time zone string, extract a rule in the form
+** date[/time]. See POSIX section 8 for the format of "date" and "time".
+** If a valid rule is not found, return NULL.
+** Otherwise, return a pointer to the first character not part of the rule.
+*/
+
+static const char *
+getrule(const char *strp, struct rule * const rulep)
+{
+ if (*strp == 'J') {
+ /*
+ ** Julian day.
+ */
+ rulep->r_type = JULIAN_DAY;
+ ++strp;
+ strp = getnum(strp, &rulep->r_day, 1, DAYSPERNYEAR);
+ } else if (*strp == 'M') {
+ /*
+ ** Month, week, day.
+ */
+ rulep->r_type = MONTH_NTH_DAY_OF_WEEK;
+ ++strp;
+ strp = getnum(strp, &rulep->r_mon, 1, MONSPERYEAR);
+ if (strp == NULL)
+ return NULL;
+ if (*strp++ != '.')
+ return NULL;
+ strp = getnum(strp, &rulep->r_week, 1, 5);
+ if (strp == NULL)
+ return NULL;
+ if (*strp++ != '.')
+ return NULL;
+ strp = getnum(strp, &rulep->r_day, 0, DAYSPERWEEK - 1);
+ } else if (is_digit(*strp)) {
+ /*
+ ** Day of year.
+ */
+ rulep->r_type = DAY_OF_YEAR;
+ strp = getnum(strp, &rulep->r_day, 0, DAYSPERLYEAR - 1);
+ } else return NULL; /* invalid format */
+ if (strp == NULL)
+ return NULL;
+ if (*strp == '/') {
+ /*
+ ** Time specified.
+ */
+ ++strp;
+ strp = getsecs(strp, &rulep->r_time);
+ } else rulep->r_time = 2 * SECSPERHOUR; /* default = 2:00:00 */
+ return strp;
+}
+
+/*
+** Given the Epoch-relative time of January 1, 00:00:00 UTC, in a year, the
+** year, a rule, and the offset from UTC at the time that rule takes effect,
+** calculate the Epoch-relative time that rule takes effect.
+*/
+
+static time_t
+transtime(const time_t janfirst, const int year,
+ const struct rule * const rulep, const long offset)
+{
+ int leapyear;
+ time_t value;
+ int i;
+ int d, m1, yy0, yy1, yy2, dow;
+
+ INITIALIZE(value);
+ leapyear = isleap(year);
+ switch (rulep->r_type) {
+
+ case JULIAN_DAY:
+ /*
+ ** Jn - Julian day, 1 == January 1, 60 == March 1 even in leap
+ ** years.
+ ** In non-leap years, or if the day number is 59 or less, just
+ ** add SECSPERDAY times the day number-1 to the time of
+ ** January 1, midnight, to get the day.
+ */
+ value = janfirst + (rulep->r_day - 1) * SECSPERDAY;
+ if (leapyear && rulep->r_day >= 60)
+ value += SECSPERDAY;
+ break;
+
+ case DAY_OF_YEAR:
+ /*
+ ** n - day of year.
+ ** Just add SECSPERDAY times the day number to the time of
+ ** January 1, midnight, to get the day.
+ */
+ value = janfirst + rulep->r_day * SECSPERDAY;
+ break;
+
+ case MONTH_NTH_DAY_OF_WEEK:
+ /*
+ ** Mm.n.d - nth "dth day" of month m.
+ */
+ value = janfirst;
+ for (i = 0; i < rulep->r_mon - 1; ++i)
+ value += mon_lengths[leapyear][i] * SECSPERDAY;
+
+ /*
+ ** Use Zeller's Congruence to get day-of-week of first day of
+ ** month.
+ */
+ m1 = (rulep->r_mon + 9) % 12 + 1;
+ yy0 = (rulep->r_mon <= 2) ? (year - 1) : year;
+ yy1 = yy0 / 100;
+ yy2 = yy0 % 100;
+ dow = ((26 * m1 - 2) / 10 +
+ 1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7;
+ if (dow < 0)
+ dow += DAYSPERWEEK;
+
+ /*
+ ** "dow" is the day-of-week of the first day of the month. Get
+ ** the day-of-month (zero-origin) of the first "dow" day of the
+ ** month.
+ */
+ d = rulep->r_day - dow;
+ if (d < 0)
+ d += DAYSPERWEEK;
+ for (i = 1; i < rulep->r_week; ++i) {
+ if (d + DAYSPERWEEK >=
+ mon_lengths[leapyear][rulep->r_mon - 1])
+ break;
+ d += DAYSPERWEEK;
+ }
+
+ /*
+ ** "d" is the day-of-month (zero-origin) of the day we want.
+ */
+ value += d * SECSPERDAY;
+ break;
+ }
+
+ /*
+ ** "value" is the Epoch-relative time of 00:00:00 UTC on the day in
+ ** question. To get the Epoch-relative time of the specified local
+ ** time on that day, add the transition time and the current offset
+ ** from UTC.
+ */
+ return value + rulep->r_time + offset;
+}
+
+/*
+** Given a POSIX section 8-style TZ string, fill in the rule tables as
+** appropriate.
+*/
+
+static int
+tzparse(const char *name, struct state * const sp, const int lastditch)
+{
+ const char * stdname;
+ const char * dstname;
+ size_t stdlen;
+ size_t dstlen;
+ long stdoffset;
+ long dstoffset;
+ time_t * atp;
+ unsigned char * typep;
+ char * cp;
+ int load_result;
+
+ INITIALIZE(dstname);
+ if (lastditch) {
+ stdname = name;
+ stdlen = strlen(name); /* length of standard zone name */
+ name += stdlen;
+ if (stdlen >= sizeof sp->chars)
+ stdlen = (sizeof sp->chars) - 1;
+ stdoffset = 0;
+ } else {
+ name = getzname(name, (char **)&stdname, &stdlen);
+ if (*name == '\0')
+ return -1; /* was "stdoffset = 0;" */
+ else {
+ name = getoffset(name, &stdoffset);
+ if (name == NULL)
+ return -1;
+ }
+ }
+#ifdef NOTIFY_TZ
+ load_result = tzload(TZDEFRULES, sp, NULL, FALSE);
+#else /* !NOTIFY_TZ */
+ load_result = tzload(TZDEFRULES, sp, FALSE);
+#endif /* NOTIFY_TZ */
+ if (load_result != 0)
+ sp->leapcnt = 0; /* so, we're off a little */
+ if (*name != '\0') {
+ if (*name == '<') {
+ dstname = ++name;
+ name = getqzname(name, '>');
+ if (*name != '>')
+ return -1;
+ dstlen = name - dstname;
+ name++;
+ } else {
+ dstname = name;
+ name = getzname(name, (char **)&dstname, &dstlen);
+ }
+ if (*name != '\0' && *name != ',' && *name != ';') {
+ name = getoffset(name, &dstoffset);
+ if (name == NULL)
+ return -1;
+ } else dstoffset = stdoffset - SECSPERHOUR;
+ if (*name == '\0' && load_result != 0)
+ name = TZDEFRULESTRING;
+ if (*name == ',' || *name == ';') {
+ struct rule start;
+ struct rule end;
+ int year;
+ time_t janfirst;
+ time_t starttime;
+ time_t endtime;
+
+ ++name;
+ if ((name = getrule(name, &start)) == NULL)
+ return -1;
+ if (*name++ != ',')
+ return -1;
+ if ((name = getrule(name, &end)) == NULL)
+ return -1;
+ if (*name != '\0')
+ return -1;
+ sp->typecnt = 2; /* standard time and DST */
+ /*
+ ** Two transitions per year, from EPOCH_YEAR forward.
+ */
+ sp->ttis[0].tt_gmtoff = -dstoffset;
+ sp->ttis[0].tt_isdst = 1;
+ sp->ttis[0].tt_abbrind = stdlen + 1;
+ sp->ttis[1].tt_gmtoff = -stdoffset;
+ sp->ttis[1].tt_isdst = 0;
+ sp->ttis[1].tt_abbrind = 0;
+ atp = sp->ats;
+ typep = sp->types;
+ janfirst = 0;
+ sp->timecnt = 0;
+ for (year = EPOCH_YEAR;
+ sp->timecnt + 2 <= TZ_MAX_TIMES;
+ ++year) {
+ time_t newfirst;
+
+ starttime = transtime(janfirst, year, &start,
+ stdoffset);
+ endtime = transtime(janfirst, year, &end,
+ dstoffset);
+ if (starttime > endtime) {
+ *atp++ = endtime;
+ *typep++ = 1; /* DST ends */
+ *atp++ = starttime;
+ *typep++ = 0; /* DST begins */
+ } else {
+ *atp++ = starttime;
+ *typep++ = 0; /* DST begins */
+ *atp++ = endtime;
+ *typep++ = 1; /* DST ends */
+ }
+ sp->timecnt += 2;
+ newfirst = janfirst;
+ newfirst += year_lengths[isleap(year)] *
+ SECSPERDAY;
+ if (newfirst <= janfirst)
+ break;
+ janfirst = newfirst;
+ }
+ } else {
+ long theirstdoffset;
+ long theirdstoffset;
+ long theiroffset;
+ int isdst;
+ int i;
+ int j;
+
+ if (*name != '\0')
+ return -1;
+ /*
+ ** Initial values of theirstdoffset and theirdstoffset.
+ */
+ theirstdoffset = 0;
+ for (i = 0; i < sp->timecnt; ++i) {
+ j = sp->types[i];
+ if (!sp->ttis[j].tt_isdst) {
+ theirstdoffset =
+ -sp->ttis[j].tt_gmtoff;
+ break;
+ }
+ }
+ theirdstoffset = 0;
+ for (i = 0; i < sp->timecnt; ++i) {
+ j = sp->types[i];
+ if (sp->ttis[j].tt_isdst) {
+ theirdstoffset =
+ -sp->ttis[j].tt_gmtoff;
+ break;
+ }
+ }
+ /*
+ ** Initially we're assumed to be in standard time.
+ */
+ isdst = FALSE;
+ theiroffset = theirstdoffset;
+ /*
+ ** Now juggle transition times and types
+ ** tracking offsets as you do.
+ */
+ for (i = 0; i < sp->timecnt; ++i) {
+ j = sp->types[i];
+ sp->types[i] = sp->ttis[j].tt_isdst;
+ if (sp->ttis[j].tt_ttisgmt) {
+ /* No adjustment to transition time */
+ } else {
+ /*
+ ** If summer time is in effect, and the
+ ** transition time was not specified as
+ ** standard time, add the summer time
+ ** offset to the transition time;
+ ** otherwise, add the standard time
+ ** offset to the transition time.
+ */
+ /*
+ ** Transitions from DST to DDST
+ ** will effectively disappear since
+ ** POSIX provides for only one DST
+ ** offset.
+ */
+ if (isdst && !sp->ttis[j].tt_ttisstd) {
+ sp->ats[i] += dstoffset -
+ theirdstoffset;
+ } else {
+ sp->ats[i] += stdoffset -
+ theirstdoffset;
+ }
+ }
+ theiroffset = -sp->ttis[j].tt_gmtoff;
+ if (sp->ttis[j].tt_isdst)
+ theirdstoffset = theiroffset;
+ else theirstdoffset = theiroffset;
+ }
+ /*
+ ** Finally, fill in ttis.
+ ** ttisstd and ttisgmt need not be handled.
+ */
+ sp->ttis[0].tt_gmtoff = -stdoffset;
+ sp->ttis[0].tt_isdst = FALSE;
+ sp->ttis[0].tt_abbrind = 0;
+ sp->ttis[1].tt_gmtoff = -dstoffset;
+ sp->ttis[1].tt_isdst = TRUE;
+ sp->ttis[1].tt_abbrind = stdlen + 1;
+ sp->typecnt = 2;
+ }
+ } else {
+ dstlen = 0;
+ sp->typecnt = 1; /* only standard time */
+ sp->timecnt = 0;
+ sp->ttis[0].tt_gmtoff = -stdoffset;
+ sp->ttis[0].tt_isdst = 0;
+ sp->ttis[0].tt_abbrind = 0;
+ }
+ sp->charcnt = stdlen + 1;
+ if (dstlen != 0)
+ sp->charcnt += dstlen + 1;
+ if ((size_t) sp->charcnt > sizeof sp->chars)
+ return -1;
+ cp = sp->chars;
+ (void) strncpy(cp, stdname, stdlen);
+ cp += stdlen;
+ *cp++ = '\0';
+ if (dstlen != 0) {
+ (void) strncpy(cp, dstname, dstlen);
+ *(cp + dstlen) = '\0';
+ }
+ return 0;
+}
+
+static void
+#ifdef NOTIFY_TZ
+gmtload(struct state * const sp, char *path)
+#else /* ! NOTIFY_TZ */
+gmtload(struct state * const sp)
+#endif /* NOTIFY_TZ */
+{
+#ifdef NOTIFY_TZ
+ if (tzload(gmt, sp, path, TRUE) != 0)
+#else /* ! NOTIFY_TZ */
+ if (tzload(gmt, sp, TRUE) != 0)
+#endif /* NOTIFY_TZ */
+ (void) tzparse(gmt, sp, TRUE);
+}
+
+/**
+ * In NULL_BOOTSTRAP environments, we can't use notifyd to learn about the changes in timezone.
+ * Instead, we look at the modified time of the TZDEFAULT symlink.
+ * As a performance optimization, we only reload the timezone data if the modified time is newer than the
+ * last time we loaded the timezone file.
+ *
+ * If the tzload fails, we need to reset the saved timestamp to force the timezone file to be reloaded next time
+ * we try to use it. This is a special case that occurs at first boot for launchd (and other early boot-tasks)
+ * rdar://60592414
+ */
+static struct timespec last_default_tzload_mtimespec = {0, 0};
+static void
+tzsetwall_check_default_file_timestamp(void)
+{
+ if (!TZDEFAULT) {
+ return;
+ }
+
+ struct stat statbuf;
+
+ if (lstat(TZDEFAULT, &statbuf) == 0) {
+ if (statbuf.st_mtimespec.tv_sec > last_default_tzload_mtimespec.tv_sec ||
+ (statbuf.st_mtimespec.tv_sec == last_default_tzload_mtimespec.tv_sec &&
+ statbuf.st_mtimespec.tv_nsec > last_default_tzload_mtimespec.tv_nsec)) {
+ /* Trigger resetting the local TZ */
+ lcl_is_set = 0;
+ }
+ last_default_tzload_mtimespec = statbuf.st_mtimespec;
+ }
+}
+
+static void
+tzsetwall_basic(int rdlocked)
+{
+#ifdef NOTIFY_TZ
+ if (bootstrap_port != MACH_PORT_NULL) {
+ notify_check_tz(&lcl_notify);
+ } else {
+ tzsetwall_check_default_file_timestamp();
+ }
+#else
+ tzsetwall_check_default_file_timestamp();
+#endif /* NOTIFY_TZ */
+
+ if (!rdlocked)
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+ if (lcl_is_set < 0) {
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("tzsetwall_basic lcl_is_set < 0\n");
+#endif
+ if (!rdlocked)
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+ return;
+ }
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("tzsetwall_basic not set\n");
+#endif
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+
+ _RWLOCK_WRLOCK(&lcl_rwlock);
+ lcl_is_set = -1;
+
+#ifdef ALL_STATE
+ if (lclptr == NULL) {
+ lclptr = calloc(1, sizeof *lclptr);
+ if (lclptr == NULL) {
+ settzname(); /* all we can do */
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+ if (rdlocked)
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+ return;
+ }
+ }
+#endif /* defined ALL_STATE */
+#ifdef NOTIFY_TZ
+ {
+ char fullname[FILENAME_MAX + 1];
+ if (tzload((char *) NULL, lclptr, fullname, TRUE) != 0) {
+ // The load failed, so we need to reset the cached modified time
+ // of the timezone file
+ last_default_tzload_mtimespec = (const struct timespec){0};
+
+ /*
+ * If fullname is empty (an error occurred) then
+ * default to the UTC path
+ */
+ gmtload(lclptr, *fullname ? NULL : fullname);
+ }
+ notify_register_tz(fullname, &lcl_notify);
+ }
+#else /* ! NOTIFY_TZ */
+ if (tzload((char *) NULL, lclptr, TRUE) != 0)
+ gmtload(lclptr);
+#endif /* NOTIFY_TZ */
+ settzname();
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+
+ if (rdlocked)
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+}
+
+void
+tzsetwall(void)
+{
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("tzsetwall called\n");
+#endif /* NOTIFY_TZ_DEBUG */
+ tzsetwall_basic(0);
+}
+
+__private_extern__ void
+tzset_basic(int rdlocked)
+{
+ const char * name;
+
+ name = getenv("TZ");
+ if (name == NULL) {
+ tzsetwall_basic(rdlocked);
+ return;
+ }
+
+#ifdef NOTIFY_TZ
+ notify_check_tz(&lcl_notify);
+#endif /* NOTIFY_TZ */
+ if (!rdlocked)
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+ if (lcl_is_set > 0 && strcmp(lcl_TZname, name) == 0) {
+ if (!rdlocked)
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("tzset_basic matched %s\n", lcl_TZname);
+#endif
+ return;
+ }
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+
+ _RWLOCK_WRLOCK(&lcl_rwlock);
+ lcl_is_set = strlen(name) < sizeof lcl_TZname;
+ if (lcl_is_set)
+ (void) strcpy(lcl_TZname, name);
+
+#ifdef ALL_STATE
+ if (lclptr == NULL) {
+ lclptr = (struct state *) calloc(1, sizeof *lclptr);
+ if (lclptr == NULL) {
+ settzname(); /* all we can do */
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+ if (rdlocked)
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+ return;
+ }
+ }
+#endif /* defined ALL_STATE */
+ if (*name == '\0') {
+ /*
+ ** User wants it fast rather than right.
+ */
+ lclptr->leapcnt = 0; /* so, we're off a little */
+ lclptr->timecnt = 0;
+ lclptr->typecnt = 0;
+ lclptr->ttis[0].tt_isdst = 0;
+ lclptr->ttis[0].tt_gmtoff = 0;
+ lclptr->ttis[0].tt_abbrind = 0;
+ (void) strcpy(lclptr->chars, gmt);
+#ifdef NOTIFY_TZ
+ notify_register_tz(NULL, &lcl_notify);
+#endif /* NOTIFY_TZ */
+ } else
+#ifdef NOTIFY_TZ
+ {
+ char fullname[FILENAME_MAX + 1];
+ /*
+ * parsedOK indicates whether tzparse() was called and
+ * succeeded. This means that TZ is a time conversion
+ * specification, so we don't need to register for
+ * notifications.
+ */
+ int parsedOK = FALSE;
+ if (tzload(name, lclptr, fullname, TRUE) != 0) {
+ if (name[0] == ':' || !(parsedOK = tzparse(name, lclptr, FALSE) == 0)) {
+ /*
+ * If fullname is empty (an error occurred) then
+ * default to the UTC path
+ */
+ (void) gmtload(lclptr, *fullname ? NULL : fullname);
+ }
+ }
+ notify_register_tz(parsedOK ? NULL : fullname, &lcl_notify);
+ }
+#else /* ! NOTIFY_TZ */
+ if (tzload(name, lclptr, TRUE) != 0)
+ if (name[0] == ':' || tzparse(name, lclptr, FALSE) != 0)
+ (void) gmtload(lclptr);
+#endif /* NOTIFY_TZ */
+ settzname();
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+
+ if (rdlocked)
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+}
+
+void
+tzset(void)
+{
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("tzset called TZ=%s\n", getenv("TZ"));
+#endif /* NOTIFY_TZ_DEBUG */
+ tzset_basic(0);
+}
+
+/*
+** The easy way to behave "as if no library function calls" localtime
+** is to not call it--so we drop its guts into "localsub", which can be
+** freely called. (And no, the PANS doesn't require the above behavior--
+** but it *is* desirable.)
+**
+** The unused offset argument is for the benefit of mktime variants.
+*/
+
+/*ARGSUSED*/
+#ifdef __LP64__
+__private_extern__ struct tm *
+#else /* !__LP64__ */
+__private_extern__ void
+#endif /* __LP64__ */
+localsub(const time_t *const timep, const long offset, struct tm *const tmp)
+{
+ struct state * sp;
+ const struct ttinfo * ttisp;
+ int i;
+#ifdef __LP64__
+ struct tm * result;
+#endif /* __LP64__ */
+ const time_t t = *timep;
+
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("localsub called\n");
+#endif /* NOTIFY_TZ_DEBUG */
+ sp = lclptr;
+#ifdef ALL_STATE
+ if (sp == NULL) {
+#ifdef __LP64__
+ return gmtsub(timep, offset, tmp);
+#else /* !__LP64__ */
+ gmtsub(timep, offset, tmp);
+ return;
+#endif /* __LP64__ */
+ }
+#endif /* defined ALL_STATE */
+ if ((sp->goback && t < sp->ats[0]) ||
+ (sp->goahead && t > sp->ats[sp->timecnt - 1])) {
+ time_t newt = t;
+ register time_t seconds;
+ register time_t tcycles;
+ register int_fast64_t icycles;
+
+ if (t < sp->ats[0])
+ seconds = sp->ats[0] - t;
+ else seconds = t - sp->ats[sp->timecnt - 1];
+ --seconds;
+ tcycles = seconds / YEARSPERREPEAT / AVGSECSPERYEAR;
+ ++tcycles;
+ icycles = tcycles;
+ if (tcycles - icycles >= 1 || icycles - tcycles >= 1) {
+#ifdef __LP64__
+ return NULL;
+#else /* !__LP64__ */
+ return;
+#endif /* __LP64__ */
+ }
+ seconds = icycles;
+ seconds *= YEARSPERREPEAT;
+ seconds *= AVGSECSPERYEAR;
+ if (t < sp->ats[0])
+ newt += seconds;
+ else newt -= seconds;
+ if (newt < sp->ats[0] ||
+ newt > sp->ats[sp->timecnt - 1])
+#ifdef __LP64__
+ return NULL; /* "cannot happen" */
+ result = localsub(&newt, offset, tmp);
+ if (result == tmp) {
+#else /* !__LP64__ */
+ return;
+ localsub(&newt, offset, tmp);
+ {
+#endif /* __LP64__ */
+ register time_t newy;
+
+ newy = tmp->tm_year;
+ if (t < sp->ats[0])
+ newy -= icycles * YEARSPERREPEAT;
+ else newy += icycles * YEARSPERREPEAT;
+ tmp->tm_year = newy;
+ if (tmp->tm_year != newy)
+#ifdef __LP64__
+ return NULL;
+ }
+ return result;
+#else /* !__LP64__ */
+ return;
+ }
+ return;
+#endif /* __LP64__ */
+ }
+ if (sp->timecnt == 0 || t < sp->ats[0]) {
+ i = 0;
+ while (sp->ttis[i].tt_isdst)
+ if (++i >= sp->typecnt) {
+ i = 0;
+ break;
+ }
+ } else {
+ register int lo = 1;
+ register int hi = sp->timecnt;
+
+ while (lo < hi) {
+ register int mid = (lo + hi) >> 1;
+
+ if (t < sp->ats[mid])
+ hi = mid;
+ else lo = mid + 1;
+ }
+ i = (int) sp->types[lo - 1];
+ }
+ ttisp = &sp->ttis[i];
+ /*
+ ** To get (wrong) behavior that's compatible with System V Release 2.0
+ ** you'd replace the statement below with
+ ** t += ttisp->tt_gmtoff;
+ ** timesub(&t, 0L, sp, tmp);
+ */
+#ifdef __LP64__
+ result = timesub(&t, ttisp->tt_gmtoff, sp, tmp);
+ if (result == NULL)
+ return NULL;
+#else /* !__LP64__ */
+ timesub(&t, ttisp->tt_gmtoff, sp, tmp);
+#endif /* __LP64__ */
+ tmp->tm_isdst = ttisp->tt_isdst;
+ tzname[tmp->tm_isdst] = &sp->chars[ttisp->tt_abbrind];
+#ifdef TM_ZONE
+ tmp->TM_ZONE = &sp->chars[ttisp->tt_abbrind];
+#endif /* defined TM_ZONE */
+#ifdef __LP64__
+ return result;
+#endif /* __LP64__ */
+}
+
+static void
+localtime_key_init(void)
+{
+
+ localtime_key = __LIBC_PTHREAD_KEY_LOCALTIME;
+ localtime_key_error = pthread_key_init_np(localtime_key, free);
+}
+
+struct tm *
+localtime(const time_t *const timep)
+{
+ struct tm *p_tm;
+
+ if (__isthreaded != 0) {
+ _pthread_once(&localtime_once, localtime_key_init);
+ if (localtime_key_error != 0) {
+ errno = localtime_key_error;
+ return(NULL);
+ }
+ p_tm = _pthread_getspecific(localtime_key);
+ if (p_tm == NULL) {
+ if ((p_tm = (struct tm *)malloc(sizeof(struct tm)))
+ == NULL)
+ return(NULL);
+ _pthread_setspecific(localtime_key, p_tm);
+ }
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+ tzset_basic(1);
+#ifdef __LP64__
+ p_tm = localsub(timep, 0L, p_tm);
+#else /* !__LP64__ */
+ localsub(timep, 0L, p_tm);
+#endif /* __LP64__ */
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+ return(p_tm);
+ } else {
+ tzset_basic(0);
+#ifdef __LP64__
+ return localsub(timep, 0L, &tm);
+#else /* !__LP64__ */
+ localsub(timep, 0L, &tm);
+ return(&tm);
+#endif /* __LP64__ */
+ }
+}
+
+/*
+** Re-entrant version of localtime.
+*/
+
+struct tm *
+localtime_r(const time_t *const __restrict timep, struct tm * __restrict tmp)
+{
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+ tzset_basic(1);
+#ifdef __LP64__
+ tmp = localsub(timep, 0L, tmp);
+#else /* !__LP64__ */
+ localsub(timep, 0L, tmp);
+#endif /* __LP64__ */
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+ return tmp;
+}
+
+static void
+gmt_init(void)
+{
+
+#ifdef ALL_STATE
+#ifdef NOTIFY_TZ
+ if (gmtptr == NULL)
+#endif /* NOTIFY_TZ */
+ gmtptr = (struct state *) calloc(1, sizeof *gmtptr);
+ if (gmtptr != NULL)
+#endif /* defined ALL_STATE */
+#ifdef NOTIFY_TZ
+ {
+ char fullname[FILENAME_MAX + 1];
+ gmtload(gmtptr, fullname);
+ notify_register_tz(fullname, &gmt_notify);
+ }
+#else /* ! NOTIFY_TZ */
+ gmtload(gmtptr);
+#endif /* NOTIFY_TZ */
+}
+
+/*
+** gmtsub is to gmtime as localsub is to localtime.
+*/
+
+#ifdef __LP64__
+static struct tm *
+#else /* !__LP64__ */
+static void
+#endif /* __LP64__ */
+gmtsub(const time_t * const timep, const long offset, struct tm * const tmp)
+{
+#ifdef __LP64__
+ register struct tm * result;
+#endif /* __LP64__ */
+
+#ifdef NOTIFY_TZ_DEBUG
+ NOTIFY_TZ_PRINTF("gmtsub called\n");
+#endif /* NOTIFY_TZ_DEBUG */
+#ifdef NOTIFY_TZ
+ notify_check_tz(&gmt_notify);
+#endif /* NOTIFY_TZ */
+ pthread_once(&gmt_once, gmt_init);
+#ifdef __LP64__
+ result = timesub(timep, offset, gmtptr, tmp);
+ if (result == NULL)
+ return NULL;
+#else /* !__LP64__ */
+ timesub(timep, offset, gmtptr, tmp);
+#endif /* __LP64__ */
+#ifdef TM_ZONE
+ /*
+ ** Could get fancy here and deliver something such as
+ ** "UTC+xxxx" or "UTC-xxxx" if offset is non-zero,
+ ** but this is no time for a treasure hunt.
+ */
+ if (offset != 0)
+ tmp->TM_ZONE = (char*)wildabbr;
+ else {
+#ifdef ALL_STATE
+ if (gmtptr == NULL)
+ tmp->TM_ZONE = (char *)gmt;
+ else tmp->TM_ZONE = gmtptr->chars;
+#endif /* defined ALL_STATE */
+#ifndef ALL_STATE
+ tmp->TM_ZONE = gmtptr->chars;
+#endif /* State Farm */
+ }
+#endif /* defined TM_ZONE */
+#ifdef __LP64__
+ return result;
+#endif /* __LP64__ */
+}
+
+static void
+gmtime_key_init(void)
+{
+
+ gmtime_key = __LIBC_PTHREAD_KEY_GMTIME;
+ gmtime_key_error = pthread_key_init_np(gmtime_key, free);
+}
+
+struct tm *
+gmtime(const time_t *const timep)
+{
+ struct tm *p_tm;
+
+ if (__isthreaded != 0) {
+ _pthread_once(&gmtime_once, gmtime_key_init);
+ if (gmtime_key_error != 0) {
+ errno = gmtime_key_error;
+ return(NULL);
+ }
+ /*
+ * Changed to follow POSIX.1 threads standard, which
+ * is what BSD currently has.
+ */
+ if ((p_tm = _pthread_getspecific(gmtime_key)) == NULL) {
+ if ((p_tm = (struct tm *)malloc(sizeof(struct tm)))
+ == NULL) {
+ return(NULL);
+ }
+ _pthread_setspecific(gmtime_key, p_tm);
+ }
+#ifdef __LP64__
+ return gmtsub(timep, 0L, p_tm);
+#else /* !__LP64__ */
+ gmtsub(timep, 0L, p_tm);
+ return(p_tm);
+#endif /* __LP64__ */
+ }
+ else {
+#ifdef __LP64__
+ return gmtsub(timep, 0L, &tm);
+#else /* !__LP64__ */
+ gmtsub(timep, 0L, &tm);
+ return(&tm);
+#endif /* __LP64__ */
+ }
+}
+
+/*
+* Re-entrant version of gmtime.
+*/
+
+struct tm *
+gmtime_r(const time_t *const timep, struct tm *tmp)
+{
+
+#ifdef __LP64__
+ return gmtsub(timep, 0L, tmp);
+#else /* !__LP64__ */
+ gmtsub(timep, 0L, tmp);
+ return tmp;
+#endif /* __LP64__ */
+}
+
+#ifdef STD_INSPIRED
+
+struct tm *
+offtime(const time_t *const timep, const long offset)
+{
+#ifdef __LP64__
+ return gmtsub(timep, offset, &tm);
+#else /* !__LP64__ */
+ gmtsub(timep, offset, &tm);
+ return &tm;
+#endif /* __LP64__ */
+}
+
+#endif /* defined STD_INSPIRED */
+
+/*
+** Return the number of leap years through the end of the given year
+** where, to make the math easy, the answer for year zero is defined as zero.
+*/
+
+__unused static int
+leaps_thru_end_of(register const int y)
+{
+#ifdef __LP64__
+ return (y >= 0) ? (y / 4 - y / 100 + y / 400) :
+ -(leaps_thru_end_of(-(y + 1)) + 1);
+#else /* !__LP64__ */
+ return (y / 4 - y / 100 + y / 400);
+#endif /* __LP64__ */
+}
+
+#ifdef __LP64__
+static struct tm *
+#else /* !__LP64__ */
+static void
+#endif /* __LP64__ */
+timesub(const time_t * const timep, const long offset,
+ const struct state * const sp, struct tm * const tmp)
+{
+ const struct lsinfo * lp;
+ long days;
+ long rem;
+ long y;
+ int yleap;
+ const int * ip;
+ long corr;
+ int hit;
+ int i;
+
+ corr = 0;
+ hit = 0;
+#ifdef ALL_STATE
+ i = (sp == NULL) ? 0 : sp->leapcnt;
+#endif /* defined ALL_STATE */
+#ifndef ALL_STATE
+ i = sp->leapcnt;
+#endif /* State Farm */
+ while (--i >= 0) {
+ lp = &sp->lsis[i];
+ if (*timep >= lp->ls_trans) {
+ if (*timep == lp->ls_trans) {
+ hit = ((i == 0 && lp->ls_corr > 0) ||
+ lp->ls_corr > sp->lsis[i - 1].ls_corr);
+ if (hit)
+ while (i > 0 &&
+ sp->lsis[i].ls_trans ==
+ sp->lsis[i - 1].ls_trans + 1 &&
+ sp->lsis[i].ls_corr ==
+ sp->lsis[i - 1].ls_corr + 1) {
+ ++hit;
+ --i;
+ }
+ }
+ corr = lp->ls_corr;
+ break;
+ }
+ }
+ days = *timep / SECSPERDAY;
+ rem = *timep % SECSPERDAY;
+#ifdef mc68k
+ if (*timep == 0x80000000) {
+ /*
+ ** A 3B1 muffs the division on the most negative number.
+ */
+ days = -24855;
+ rem = -11648;
+ }
+#endif /* defined mc68k */
+ rem += (offset - corr);
+ while (rem < 0) {
+ rem += SECSPERDAY;
+ --days;
+ }
+ while (rem >= SECSPERDAY) {
+ rem -= SECSPERDAY;
+ ++days;
+ }
+ tmp->tm_hour = (int) (rem / SECSPERHOUR);
+ rem = rem % SECSPERHOUR;
+ tmp->tm_min = (int) (rem / SECSPERMIN);
+ /*
+ ** A positive leap second requires a special
+ ** representation. This uses "... ??:59:60" et seq.
+ */
+ tmp->tm_sec = (int) (rem % SECSPERMIN) + hit;
+ tmp->tm_wday = (int) ((EPOCH_WDAY + days) % DAYSPERWEEK);
+ if (tmp->tm_wday < 0)
+ tmp->tm_wday += DAYSPERWEEK;
+ y = EPOCH_YEAR;
+#define _LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400)
+#ifdef __LP64__
+#define LEAPS_THRU_END_OF(y) ((y) >= 0 ? _LEAPS_THRU_END_OF(y) : _LEAPS_THRU_END_OF((y) + 1) - 1)
+#else /* !__LP64__ */
+#define LEAPS_THRU_END_OF(y) _LEAPS_THRU_END_OF(y)
+#endif /* __LP64__ */
+ while (days < 0 || days >= (long) year_lengths[yleap = isleap(y)]) {
+ long newy;
+
+ newy = y + days / DAYSPERNYEAR;
+ if (days < 0)
+ --newy;
+ days -= (newy - y) * DAYSPERNYEAR +
+ LEAPS_THRU_END_OF(newy - 1) -
+ LEAPS_THRU_END_OF(y - 1);
+ y = newy;
+ }
+#ifdef __LP64__
+ y -= TM_YEAR_BASE;
+ if (y < INT_MIN || y > INT_MAX) {
+ errno = EOVERFLOW;
+ return NULL;
+ }
+ tmp->tm_year = y;
+#else /* !__LP64__ */
+ tmp->tm_year = y - TM_YEAR_BASE;
+#endif /* __LP64__ */
+ tmp->tm_yday = (int) days;
+ ip = mon_lengths[yleap];
+ for (tmp->tm_mon = 0; days >= (long) ip[tmp->tm_mon]; ++(tmp->tm_mon))
+ days = days - (long) ip[tmp->tm_mon];
+ tmp->tm_mday = (int) (days + 1);
+ tmp->tm_isdst = 0;
+#ifdef TM_GMTOFF
+ tmp->TM_GMTOFF = offset;
+#endif /* defined TM_GMTOFF */
+#ifdef __LP64__
+ return tmp;
+#endif /* __LP64__ */
+}
+
+char *
+ctime(const time_t *const timep)
+{
+/*
+** Section 4.12.3.2 of X3.159-1989 requires that
+** The ctime function converts the calendar time pointed to by timer
+** to local time in the form of a string. It is equivalent to
+** asctime(localtime(timer))
+*/
+#ifdef __LP64__
+ /*
+ * In 64-bit, the timep value may produce a time value with a year
+ * that exceeds 32-bits in size (won't fit in struct tm), so localtime
+ * will return NULL.
+ */
+ struct tm *tm = localtime(timep);
+
+ if (tm == NULL)
+ return NULL;
+ return asctime(tm);
+#else /* !__LP64__ */
+ return asctime(localtime(timep));
+#endif /* __LP64__ */
+}
+
+char *
+ctime_r(const time_t *const timep, char *buf)
+{
+ struct tm mytm;
+
+#ifdef __LP64__
+ /*
+ * In 64-bit, the timep value may produce a time value with a year
+ * that exceeds 32-bits in size (won't fit in struct tm), so localtime_r
+ * will return NULL.
+ */
+ if (localtime_r(timep, &mytm) == NULL)
+ return NULL;
+ return asctime_r(&mytm, buf);
+#else /* !__LP64__ */
+ return asctime_r(localtime_r(timep, &mytm), buf);
+#endif /* __LP64__ */
+}
+
+/*
+** Adapted from code provided by Robert Elz, who writes:
+** The "best" way to do mktime I think is based on an idea of Bob
+** Kridle's (so its said...) from a long time ago.
+** It does a binary search of the time_t space. Since time_t's are
+** just 32 bits, its a max of 32 iterations (even at 64 bits it
+** would still be very reasonable).
+*/
+
+#ifndef WRONG
+#define WRONG (-1)
+#endif /* !defined WRONG */
+
+/*
+** Simplified normalize logic courtesy Paul Eggert.
+*/
+
+static int
+increment_overflow(int *number, int delta)
+{
+ int number0;
+
+ number0 = *number;
+ *number += delta;
+ return (*number < number0) != (delta < 0);
+}
+
+static int
+long_increment_overflow(long *number, int delta)
+{
+ long number0;
+
+ number0 = *number;
+ *number += delta;
+ return (*number < number0) != (delta < 0);
+}
+
+static int
+normalize_overflow(int *const tensptr, int *const unitsptr, const int base)
+{
+ int tensdelta;
+
+ tensdelta = (*unitsptr >= 0) ?
+ (*unitsptr / base) :
+ (-1 - (-1 - *unitsptr) / base);
+ *unitsptr -= tensdelta * base;
+ return increment_overflow(tensptr, tensdelta);
+}
+
+static int
+long_normalize_overflow(long *const tensptr, int *const unitsptr, const int base)
+{
+ register int tensdelta;
+
+ tensdelta = (*unitsptr >= 0) ?
+ (*unitsptr / base) :
+ (-1 - (-1 - *unitsptr) / base);
+ *unitsptr -= tensdelta * base;
+ return long_increment_overflow(tensptr, tensdelta);
+}
+
+static int
+tmcomp(const struct tm * const atmp, const struct tm * const btmp)
+{
+ int result;
+
+ /*
+ * Assume that atmp and btmp point to normalized tm strutures.
+ * So only arithmetic with tm_year could overflow in 64-bit.
+ */
+ if (atmp->tm_year != btmp->tm_year) {
+ return (atmp->tm_year > btmp->tm_year ? 1 : -1);
+ }
+ if ((result = (atmp->tm_mon - btmp->tm_mon)) == 0 &&
+ (result = (atmp->tm_mday - btmp->tm_mday)) == 0 &&
+ (result = (atmp->tm_hour - btmp->tm_hour)) == 0 &&
+ (result = (atmp->tm_min - btmp->tm_min)) == 0)
+ result = atmp->tm_sec - btmp->tm_sec;
+ return result;
+}
+
+static time_t
+time2sub(struct tm *const tmp,
+#ifdef __LP64__
+ struct tm *(*const funcp)(const time_t *, long, struct tm *),
+#else /* !__LP64__ */
+ void(*funcp) (const time_t *, long, struct tm*),
+#endif /* __LP64__ */
+ const long offset,
+ int *const okayp,
+ const int do_norm_secs,
+ int unix03)
+{
+ const struct state * sp;
+ int dir;
+ int i, j;
+ int saved_seconds;
+ long li;
+ time_t lo;
+ time_t hi;
+ long y;
+ time_t newt;
+ time_t t;
+ struct tm yourtm, mytm;
+
+ *okayp = FALSE;
+ yourtm = *tmp;
+ if (do_norm_secs) {
+ if (normalize_overflow(&yourtm.tm_min, &yourtm.tm_sec,
+ SECSPERMIN))
+ return WRONG;
+ }
+ if (normalize_overflow(&yourtm.tm_hour, &yourtm.tm_min, MINSPERHOUR))
+ return WRONG;
+ if (normalize_overflow(&yourtm.tm_mday, &yourtm.tm_hour, HOURSPERDAY))
+ return WRONG;
+ y = yourtm.tm_year;
+ if (long_normalize_overflow(&y, &yourtm.tm_mon, MONSPERYEAR))
+ return WRONG;
+ /*
+ ** Turn y into an actual year number for now.
+ ** It is converted back to an offset from TM_YEAR_BASE later.
+ */
+ if (long_increment_overflow(&y, TM_YEAR_BASE))
+ return WRONG;
+ while (yourtm.tm_mday <= 0) {
+ if (long_increment_overflow(&y, -1))
+ return WRONG;
+ li = y + (1 < yourtm.tm_mon);
+ yourtm.tm_mday += year_lengths[isleap(li)];
+ }
+ while (yourtm.tm_mday > DAYSPERLYEAR) {
+ li = y + (1 < yourtm.tm_mon);
+ yourtm.tm_mday -= year_lengths[isleap(li)];
+ if (long_increment_overflow(&y, 1))
+ return WRONG;
+ }
+ for ( ; ; ) {
+ i = mon_lengths[isleap(y)][yourtm.tm_mon];
+ if (yourtm.tm_mday <= i)
+ break;
+ yourtm.tm_mday -= i;
+ if (++yourtm.tm_mon >= MONSPERYEAR) {
+ yourtm.tm_mon = 0;
+ if (long_increment_overflow(&y, 1))
+ return WRONG;
+ }
+ }
+ if (long_increment_overflow(&y, -TM_YEAR_BASE))
+ return WRONG;
+ yourtm.tm_year = y;
+ if (yourtm.tm_year != y)
+ return WRONG;
+ /* Don't go below 1900 for POLA */
+ if (yourtm.tm_year < 0)
+ return WRONG;
+ if (yourtm.tm_sec >= 0 && yourtm.tm_sec < SECSPERMIN)
+ saved_seconds = 0;
+ else if (y + TM_YEAR_BASE < EPOCH_YEAR) {
+ /*
+ ** We can't set tm_sec to 0, because that might push the
+ ** time below the minimum representable time.
+ ** Set tm_sec to 59 instead.
+ ** This assumes that the minimum representable time is
+ ** not in the same minute that a leap second was deleted from,
+ ** which is a safer assumption than using 58 would be.
+ */
+ if (increment_overflow(&yourtm.tm_sec, 1 - SECSPERMIN))
+ return WRONG;
+ saved_seconds = yourtm.tm_sec;
+ yourtm.tm_sec = SECSPERMIN - 1;
+ } else {
+ saved_seconds = yourtm.tm_sec;
+ yourtm.tm_sec = 0;
+ }
+ /*
+ ** Do a binary search (this works whatever time_t's type is).
+ */
+ if (!TYPE_SIGNED(time_t)) {
+ lo = 0;
+ hi = lo - 1;
+ } else if (!TYPE_INTEGRAL(time_t)) {
+ if (sizeof(time_t) > sizeof(float))
+ hi = (time_t) DBL_MAX;
+ else hi = (time_t) FLT_MAX;
+ lo = -hi;
+ } else {
+ lo = 1;
+ for (i = 0; i < (int) TYPE_BIT(time_t) - 1; ++i)
+ lo *= 2;
+ hi = -(lo + 1);
+ }
+ for ( ; ; ) {
+ t = lo / 2 + hi / 2;
+ if (t < lo)
+ t = lo;
+ else if (t > hi)
+ t = hi;
+#ifdef __LP64__
+ if ((*funcp)(&t, offset, &mytm) == NULL) {
+ /*
+ ** Assume that t is too extreme to be represented in
+ ** a struct tm; arrange things so that it is less
+ ** extreme on the next pass.
+ */
+ dir = (t > 0) ? 1 : -1;
+ } else dir = tmcomp(&mytm, &yourtm);
+#else /* !__LP64__ */
+ (*funcp)(&t, offset, &mytm);
+ dir = tmcomp(&mytm, &yourtm);
+ // If we have searched the entire space without a match, exit
+ if (dir != 0 && t == lo && t == hi)
+ return WRONG;
+#endif /* __LP64__ */
+ if (dir != 0) {
+ if (t == lo) {
+ ++t;
+ if (t <= lo)
+ return WRONG;
+ ++lo;
+ } else if (t == hi) {
+ --t;
+ if (t >= hi)
+ return WRONG;
+ --hi;
+ }
+ if (lo > hi)
+ return WRONG;
+ if (dir > 0)
+ hi = t;
+ else lo = t;
+ continue;
+ }
+ sp = (funcp == localsub) ? lclptr : gmtptr;
+ if (unix03 && sp->typecnt == 1 && yourtm.tm_isdst > 0)
+ yourtm.tm_isdst = 0; /* alternative time does not apply */
+ if (yourtm.tm_isdst < 0 || mytm.tm_isdst == yourtm.tm_isdst)
+ break;
+ /*
+ ** Right time, wrong type.
+ ** Hunt for right time, right type.
+ ** It's okay to guess wrong since the guess
+ ** gets checked.
+ */
+#ifdef ALL_STATE
+ if (sp == NULL)
+ return WRONG;
+#endif /* defined ALL_STATE */
+ for (i = sp->typecnt - 1; i >= 0; --i) {
+ if (sp->ttis[i].tt_isdst != yourtm.tm_isdst)
+ continue;
+ for (j = sp->typecnt - 1; j >= 0; --j) {
+ if (sp->ttis[j].tt_isdst == yourtm.tm_isdst)
+ continue;
+ newt = t + sp->ttis[j].tt_gmtoff -
+ sp->ttis[i].tt_gmtoff;
+#ifdef __LP64__
+ if ((*funcp)(&newt, offset, &mytm) == NULL)
+ continue;
+#else /* !__LP64__ */
+ (*funcp)(&newt, offset, &mytm);
+#endif /* __LP64__ */
+ if (tmcomp(&mytm, &yourtm) != 0)
+ continue;
+ if (mytm.tm_isdst != yourtm.tm_isdst)
+ continue;
+ /*
+ ** We have a match.
+ */
+ t = newt;
+ goto label;
+ }
+ }
+ return WRONG;
+ }
+label:
+ newt = t + saved_seconds;
+ if ((newt < t) != (saved_seconds < 0))
+ return WRONG;
+ t = newt;
+#ifdef __LP64__
+ if ((*funcp)(&t, offset, tmp) == NULL)
+ return WRONG;
+#else /* !__LP64__ */
+ (*funcp)(&t, offset, tmp);
+#endif /* __LP64__ */
+ *okayp = TRUE;
+ return t;
+}
+
+static time_t
+time2(struct tm * const tmp,
+#ifdef __LP64__
+ struct tm * (*const funcp)(const time_t *, long, struct tm *),
+#else /* !__LP64__ */
+ void (*const funcp)(const time_t *, long, struct tm *),
+#endif /* __LP64__ */
+ const long offset,
+ int *const okayp,
+ int unix03)
+{
+ time_t t;
+
+ /*
+ ** First try without normalization of seconds
+ ** (in case tm_sec contains a value associated with a leap second).
+ ** If that fails, try with normalization of seconds.
+ */
+ t = time2sub(tmp, funcp, offset, okayp, FALSE, unix03);
+ return *okayp ? t : time2sub(tmp, funcp, offset, okayp, TRUE, unix03);
+}
+
+__private_extern__ time_t
+time1(struct tm * const tmp,
+#ifdef __LP64__
+struct tm * (* const funcp)(const time_t *, long, struct tm *),
+#else /* !__LP64__ */
+void (* const funcp)(const time_t *, long, struct tm *),
+#endif /* __LP64__ */
+ const long offset, int unix03)
+{
+ time_t t;
+ const struct state * sp;
+ int samei, otheri;
+ int sameind, otherind;
+ int i;
+ int nseen;
+ int seen[TZ_MAX_TYPES];
+ int types[TZ_MAX_TYPES];
+ int okay;
+
+ if (tmp == NULL) {
+ errno = EINVAL;
+ return WRONG;
+ }
+
+ if (tmp->tm_isdst > 1)
+ tmp->tm_isdst = 1;
+ t = time2(tmp, funcp, offset, &okay, unix03);
+#ifdef PCTS
+ /*
+ ** PCTS code courtesy Grant Sullivan.
+ */
+ if (okay)
+ return t;
+ if (tmp->tm_isdst < 0)
+ tmp->tm_isdst = 0; /* reset to std and try again */
+#endif /* defined PCTS */
+#ifndef PCTS
+ if (okay || tmp->tm_isdst < 0)
+ return t;
+#endif /* !defined PCTS */
+ /*
+ ** We're supposed to assume that somebody took a time of one type
+ ** and did some math on it that yielded a "struct tm" that's bad.
+ ** We try to divine the type they started from and adjust to the
+ ** type they need.
+ */
+ sp = (const struct state *) ((funcp == localsub) ? lclptr : gmtptr);
+#ifdef ALL_STATE
+ if (sp == NULL)
+ return WRONG;
+#endif /* defined ALL_STATE */
+ for (i = 0; i < sp->typecnt; ++i)
+ seen[i] = FALSE;
+ nseen = 0;
+ for (i = sp->timecnt - 1; i >= 0; --i)
+ if (!seen[sp->types[i]]) {
+ seen[sp->types[i]] = TRUE;
+ types[nseen++] = sp->types[i];
+ }
+ for (sameind = 0; sameind < nseen; ++sameind) {
+ samei = types[sameind];
+ if (sp->ttis[samei].tt_isdst != tmp->tm_isdst)
+ continue;
+ for (otherind = 0; otherind < nseen; ++otherind) {
+ otheri = types[otherind];
+ if (sp->ttis[otheri].tt_isdst == tmp->tm_isdst)
+ continue;
+ tmp->tm_sec += sp->ttis[otheri].tt_gmtoff -
+ sp->ttis[samei].tt_gmtoff;
+ tmp->tm_isdst = !tmp->tm_isdst;
+ t = time2(tmp, funcp, offset, &okay, unix03);
+ if (okay)
+ return t;
+ tmp->tm_sec -= sp->ttis[otheri].tt_gmtoff -
+ sp->ttis[samei].tt_gmtoff;
+ tmp->tm_isdst = !tmp->tm_isdst;
+ }
+ }
+ return WRONG;
+}
+#else /* BUILDING_VARIANT */
+extern pthread_rwlock_t lcl_rwlock;
+#endif /* BUILDING_VARIANT */
+
+time_t
+mktime(struct tm *const tmp)
+{
+ time_t mktime_return_value;
+ int serrno = errno;
+ _RWLOCK_RDLOCK(&lcl_rwlock);
+ tzset_basic(1);
+ mktime_return_value = time1(tmp, localsub, 0L, __DARWIN_UNIX03);
+ _RWLOCK_UNLOCK(&lcl_rwlock);
+ errno = serrno;
+ return(mktime_return_value);
+}
+
+#if !BUILDING_VARIANT
+#ifdef STD_INSPIRED
+
+time_t
+timelocal(struct tm *const tmp)
+{
+ if (tmp != NULL)
+ tmp->tm_isdst = -1; /* in case it wasn't initialized */
+ return mktime(tmp);
+}
+
+time_t
+timegm(struct tm *const tmp)
+{
+ if (tmp != NULL)
+ tmp->tm_isdst = 0;
+ return time1(tmp, gmtsub, 0L, __DARWIN_UNIX03);
+}
+
+time_t
+timeoff(struct tm *const tmp, const long offset)
+{
+ if (tmp != NULL)
+ tmp->tm_isdst = 0;
+ return time1(tmp, gmtsub, offset, __DARWIN_UNIX03);
+}
+
+#endif /* defined STD_INSPIRED */
+
+#ifdef CMUCS
+
+/*
+** The following is supplied for compatibility with
+** previous versions of the CMUCS runtime library.
+*/
+
+long
+gtime(struct tm *const tmp)
+{
+ const time_t t = mktime(tmp);
+
+ if (t == WRONG)
+ return -1;
+ return t;
+}
+
+#endif /* defined CMUCS */
+
+/*
+** XXX--is the below the right way to conditionalize??
+*/
+
+#ifdef STD_INSPIRED
+
+/*
+** IEEE Std 1003.1-1988 (POSIX) legislates that 536457599
+** shall correspond to "Wed Dec 31 23:59:59 UTC 1986", which
+** is not the case if we are accounting for leap seconds.
+** So, we provide the following conversion routines for use
+** when exchanging timestamps with POSIX conforming systems.
+*/
+
+static long
+leapcorr(time_t *timep)
+{
+ struct state * sp;
+ struct lsinfo * lp;
+ int i;
+
+ sp = lclptr;
+ i = sp->leapcnt;
+ while (--i >= 0) {
+ lp = &sp->lsis[i];
+ if (*timep >= lp->ls_trans)
+ return lp->ls_corr;
+ }
+ return 0;
+}
+
+time_t
+time2posix(time_t t)
+{
+ tzset();
+ return t - leapcorr(&t);
+}
+
+time_t
+posix2time(time_t t)
+{
+ time_t x;
+ time_t y;
+
+ tzset();
+ /*
+ ** For a positive leap second hit, the result
+ ** is not unique. For a negative leap second
+ ** hit, the corresponding time doesn't exist,
+ ** so we return an adjacent second.
+ */
+ x = t + leapcorr(&t);
+ y = x - leapcorr(&x);
+ if (y < t) {
+ do {
+ x++;
+ y = x - leapcorr(&x);
+ } while (y < t);
+ if (t != y)
+ return x - 1;
+ } else if (y > t) {
+ do {
+ --x;
+ y = x - leapcorr(&x);
+ } while (y > t);
+ if (t != y)
+ return x + 1;
+ }
+ return x;
+}
+
+#endif /* defined STD_INSPIRED */
+#endif /* !BUILDING_VARIANT */
+#pragma clang diagnostic pop