git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@178607 65c4cc65-6c06-0410-ace0-fbb531ad65f3
1993 lines
51 KiB
C
1993 lines
51 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 1999 - 2005, Digium, Inc.
|
|
*
|
|
* Mark Spencer <markster@digium.com>
|
|
*
|
|
* Most of this code is in the public domain, so clarified as of
|
|
* June 5, 1996 by Arthur David Olson (arthur_david_olson@nih.gov).
|
|
*
|
|
* All modifications to this code to abstract timezones away from
|
|
* the environment are by Tilghman Lesher, <tlesher@vcch.com>, with
|
|
* the copyright assigned to Digium.
|
|
*
|
|
* See http://www.asterisk.org for more information about
|
|
* the Asterisk project. Please do not directly contact
|
|
* any of the maintainers of this project for assistance;
|
|
* the project provides a web site, mailing lists and IRC
|
|
* channels for your use.
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
* at the top of the source tree.
|
|
*/
|
|
|
|
/*! \file
|
|
*
|
|
* Multi-timezone Localtime code
|
|
*
|
|
* The original source from this file may be obtained from ftp://elsie.nci.nih.gov/pub/
|
|
*/
|
|
|
|
/*
|
|
** This file is in the public domain, so clarified as of
|
|
** 1996-06-05 by Arthur David Olson.
|
|
*/
|
|
|
|
/*
|
|
** Leap second handling from Bradley White.
|
|
** POSIX-style TZ environment variable handling from Guy Harris.
|
|
*/
|
|
|
|
/* #define DEBUG */
|
|
|
|
/*LINTLIBRARY*/
|
|
|
|
#include "asterisk.h"
|
|
|
|
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
|
|
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <float.h>
|
|
#ifdef HAVE_INOTIFY
|
|
#include <sys/inotify.h>
|
|
#endif
|
|
|
|
#include "private.h"
|
|
#include "tzfile.h"
|
|
|
|
#include "asterisk/lock.h"
|
|
#include "asterisk/localtime.h"
|
|
#include "asterisk/strings.h"
|
|
#include "asterisk/linkedlists.h"
|
|
#include "asterisk/utils.h"
|
|
|
|
#ifndef lint
|
|
#ifndef NOID
|
|
static char __attribute__((unused)) elsieid[] = "@(#)localtime.c 8.5";
|
|
#endif /* !defined NOID */
|
|
#endif /* !defined lint */
|
|
|
|
#ifndef TZ_ABBR_MAX_LEN
|
|
#define TZ_ABBR_MAX_LEN 16
|
|
#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 */
|
|
|
|
/*
|
|
** 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 */
|
|
|
|
static const char gmt[] = "GMT";
|
|
static const struct timeval WRONG = { 0, 0 };
|
|
|
|
/*! \note
|
|
* 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 */
|
|
|
|
/*!< \brief time type information */
|
|
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 */
|
|
};
|
|
|
|
/*! \brief leap second information */
|
|
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 */
|
|
#ifndef TZ_STRLEN_MAX
|
|
#define TZ_STRLEN_MAX 255
|
|
#endif /* !defined TZ_STRLEN_MAX */
|
|
|
|
struct state {
|
|
/*! Name of the file that this references */
|
|
char name[TZ_STRLEN_MAX + 1];
|
|
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];
|
|
#ifdef HAVE_INOTIFY
|
|
int wd[2];
|
|
#else
|
|
time_t mtime[2];
|
|
#endif
|
|
AST_LIST_ENTRY(state) list;
|
|
};
|
|
|
|
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 */
|
|
|
|
/*
|
|
** Prototypes for static functions.
|
|
*/
|
|
|
|
static long detzcode P((const char * codep));
|
|
static time_t detzcode64 P((const char * codep));
|
|
static int differ_by_repeat P((time_t t1, time_t t0));
|
|
static const char * getzname P((const char * strp));
|
|
static const char * getqzname P((const char * strp, const int delim));
|
|
static const char * getnum P((const char * strp, int * nump, int min,
|
|
int max));
|
|
static const char * getsecs P((const char * strp, long * secsp));
|
|
static const char * getoffset P((const char * strp, long * offsetp));
|
|
static const char * getrule P((const char * strp, struct rule * rulep));
|
|
static int gmtload P((struct state * sp));
|
|
static struct ast_tm * gmtsub P((const struct timeval * timep, long offset,
|
|
struct ast_tm * tmp));
|
|
static struct ast_tm * localsub P((const struct timeval * timep, long offset,
|
|
struct ast_tm * tmp, const struct state *sp));
|
|
static int increment_overflow P((int * number, int delta));
|
|
static int leaps_thru_end_of P((int y));
|
|
static int long_increment_overflow P((long * number, int delta));
|
|
static int long_normalize_overflow P((long * tensptr,
|
|
int * unitsptr, const int base));
|
|
static int normalize_overflow P((int * tensptr, int * unitsptr,
|
|
const int base));
|
|
static struct timeval time1 P((struct ast_tm * tmp,
|
|
struct ast_tm * (*funcp) P((const struct timeval *,
|
|
long, struct ast_tm *, const struct state *sp)),
|
|
long offset, const struct state *sp));
|
|
static struct timeval time2 P((struct ast_tm *tmp,
|
|
struct ast_tm * (*funcp) P((const struct timeval *,
|
|
long, struct ast_tm*, const struct state *sp)),
|
|
long offset, int * okayp, const struct state *sp));
|
|
static struct timeval time2sub P((struct ast_tm *tmp,
|
|
struct ast_tm * (*funcp) (const struct timeval *,
|
|
long, struct ast_tm*, const struct state *sp),
|
|
long offset, int * okayp, int do_norm_secs, const struct state *sp));
|
|
static struct ast_tm * timesub P((const struct timeval * timep, long offset,
|
|
const struct state * sp, struct ast_tm * tmp));
|
|
static int tmcomp P((const struct ast_tm * atmp,
|
|
const struct ast_tm * btmp));
|
|
static time_t transtime P((time_t janfirst, int year,
|
|
const struct rule * rulep, long offset));
|
|
static int tzload P((const char * name, struct state * sp,
|
|
int doextend));
|
|
static int tzparse P((const char * name, struct state * sp,
|
|
int lastditch));
|
|
|
|
static AST_LIST_HEAD_STATIC(zonelist, state);
|
|
|
|
#ifndef TZ_STRLEN_MAX
|
|
#define TZ_STRLEN_MAX 255
|
|
#endif /* !defined TZ_STRLEN_MAX */
|
|
|
|
static pthread_t inotify_thread = AST_PTHREADT_NULL;
|
|
static ast_cond_t initialization;
|
|
static ast_mutex_t initialization_lock;
|
|
#ifdef HAVE_INOTIFY
|
|
static int inotify_fd = -1;
|
|
|
|
static void *inotify_daemon(void *data)
|
|
{
|
|
struct {
|
|
struct inotify_event iev;
|
|
char name[FILENAME_MAX + 1];
|
|
} buf;
|
|
ssize_t res;
|
|
struct state *cur;
|
|
|
|
inotify_fd = inotify_init();
|
|
|
|
ast_mutex_lock(&initialization_lock);
|
|
ast_cond_signal(&initialization);
|
|
ast_mutex_unlock(&initialization_lock);
|
|
|
|
if (inotify_fd < 0) {
|
|
ast_log(LOG_ERROR, "Cannot initialize file notification service: %s (%d)\n", strerror(errno), errno);
|
|
inotify_thread = AST_PTHREADT_NULL;
|
|
return NULL;
|
|
}
|
|
|
|
for (;/*ever*/;) {
|
|
/* This read should block, most of the time. */
|
|
if ((res = read(inotify_fd, &buf, sizeof(buf))) < sizeof(buf.iev) && res > 0) {
|
|
/* This should never happen */
|
|
ast_log(LOG_ERROR, "Inotify read less than a full event (%zd < %zd)?!!\n", res, sizeof(buf.iev));
|
|
break;
|
|
} else if (res < 0) {
|
|
if (errno == EINTR || errno == EAGAIN) {
|
|
/* If read fails, then wait a bit, then continue */
|
|
poll(NULL, 0, 10000);
|
|
continue;
|
|
}
|
|
/* Sanity check -- this should never happen, either */
|
|
ast_log(LOG_ERROR, "Inotify failed: %s\n", strerror(errno));
|
|
break;
|
|
}
|
|
AST_LIST_LOCK(&zonelist);
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&zonelist, cur, list) {
|
|
if (cur->wd[0] == buf.iev.wd || cur->wd[1] == buf.iev.wd) {
|
|
AST_LIST_REMOVE_CURRENT(list);
|
|
ast_free(cur);
|
|
break;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END
|
|
AST_LIST_UNLOCK(&zonelist);
|
|
}
|
|
close(inotify_fd);
|
|
inotify_thread = AST_PTHREADT_NULL;
|
|
return NULL;
|
|
}
|
|
|
|
static void add_notify(struct state *sp, const char *path)
|
|
{
|
|
if (inotify_thread == AST_PTHREADT_NULL) {
|
|
ast_cond_init(&initialization, NULL);
|
|
ast_mutex_init(&initialization_lock);
|
|
ast_mutex_lock(&initialization_lock);
|
|
if (!(ast_pthread_create_background(&inotify_thread, NULL, inotify_daemon, NULL))) {
|
|
/* Give the thread a chance to initialize */
|
|
ast_cond_wait(&initialization, &initialization_lock);
|
|
} else {
|
|
ast_log(LOG_ERROR, "Unable to start notification thread\n");
|
|
ast_mutex_unlock(&initialization_lock);
|
|
return;
|
|
}
|
|
ast_mutex_unlock(&initialization_lock);
|
|
}
|
|
|
|
if (inotify_fd > -1) {
|
|
char fullpath[FILENAME_MAX + 1] = "";
|
|
if (readlink(path, fullpath, sizeof(fullpath) - 1) != -1) {
|
|
/* If file the symlink points to changes */
|
|
sp->wd[1] = inotify_add_watch(inotify_fd, fullpath, IN_ATTRIB | IN_DELETE_SELF | IN_MODIFY | IN_MOVE_SELF | IN_CLOSE_WRITE );
|
|
} else {
|
|
sp->wd[1] = -1;
|
|
}
|
|
/* or if the symlink itself changes (or the real file is here, if path is not a symlink) */
|
|
sp->wd[0] = inotify_add_watch(inotify_fd, path, IN_ATTRIB | IN_DELETE_SELF | IN_MODIFY | IN_MOVE_SELF | IN_CLOSE_WRITE | IN_DONT_FOLLOW);
|
|
}
|
|
}
|
|
#else
|
|
static void *notify_daemon(void *data)
|
|
{
|
|
struct stat st, lst;
|
|
struct state *cur;
|
|
|
|
ast_mutex_lock(&initialization_lock);
|
|
ast_cond_signal(&initialization);
|
|
ast_mutex_unlock(&initialization_lock);
|
|
|
|
for (;/*ever*/;) {
|
|
char fullname[FILENAME_MAX + 1];
|
|
|
|
poll(NULL, 0, 60000);
|
|
AST_LIST_LOCK(&zonelist);
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&zonelist, cur, list) {
|
|
char *name = cur->name;
|
|
|
|
if (name[0] == ':')
|
|
++name;
|
|
if (name[0] != '/') {
|
|
(void) strcpy(fullname, TZDIR "/");
|
|
(void) strcat(fullname, name);
|
|
name = fullname;
|
|
}
|
|
stat(name, &st);
|
|
lstat(name, &lst);
|
|
if (st.st_mtime > cur->mtime[0] || lst.st_mtime > cur->mtime[1]) {
|
|
AST_LIST_REMOVE_CURRENT(list);
|
|
ast_free(cur);
|
|
continue;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END
|
|
AST_LIST_UNLOCK(&zonelist);
|
|
}
|
|
inotify_thread = AST_PTHREADT_NULL;
|
|
return NULL;
|
|
}
|
|
|
|
static void add_notify(struct state *sp, const char *path)
|
|
{
|
|
struct stat st;
|
|
|
|
if (inotify_thread == AST_PTHREADT_NULL) {
|
|
ast_cond_init(&initialization, NULL);
|
|
ast_mutex_init(&initialization_lock);
|
|
ast_mutex_lock(&initialization_lock);
|
|
if (!(ast_pthread_create_background(&inotify_thread, NULL, notify_daemon, NULL))) {
|
|
/* Give the thread a chance to initialize */
|
|
ast_cond_wait(&initialization, &initialization_lock);
|
|
}
|
|
ast_mutex_unlock(&initialization_lock);
|
|
}
|
|
|
|
stat(path, &st);
|
|
sp->mtime[0] = st.st_mtime;
|
|
lstat(path, &st);
|
|
sp->mtime[1] = st.st_mtime;
|
|
}
|
|
#endif
|
|
|
|
/*! \note
|
|
** 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 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)
|
|
{
|
|
time_t result;
|
|
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 int differ_by_repeat(const time_t t1, const time_t t0)
|
|
{
|
|
const long long at1 = t1, at0 = t0;
|
|
if (TYPE_INTEGRAL(time_t) &&
|
|
TYPE_BIT(time_t) - TYPE_SIGNED(time_t) < SECSPERREPEAT_BITS)
|
|
return 0;
|
|
return at1 - at0 == SECSPERREPEAT;
|
|
}
|
|
|
|
static int tzload(const char *name, struct state * const sp, const int doextend)
|
|
{
|
|
const char * p;
|
|
int i;
|
|
int fid;
|
|
int stored;
|
|
int nread;
|
|
union {
|
|
struct tzhead tzhead;
|
|
char buf[2 * sizeof(struct tzhead) +
|
|
2 * sizeof *sp +
|
|
4 * TZ_MAX_TIMES];
|
|
} u;
|
|
|
|
if (name == NULL && (name = TZDEFAULT) == NULL)
|
|
return -1;
|
|
{
|
|
int doaccess;
|
|
/*
|
|
** 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[FILENAME_MAX + 1];
|
|
|
|
if (name[0] == ':')
|
|
++name;
|
|
doaccess = name[0] == '/';
|
|
if (!doaccess) {
|
|
if ((p = TZDIR) == NULL)
|
|
return -1;
|
|
if ((strlen(p) + strlen(name) + 1) >= sizeof 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;
|
|
}
|
|
if (doaccess && access(name, R_OK) != 0)
|
|
return -1;
|
|
if ((fid = open(name, OPEN_MODE)) == -1)
|
|
return -1;
|
|
add_notify(sp, name);
|
|
}
|
|
nread = read(fid, u.buf, sizeof u.buf);
|
|
if (close(fid) < 0 || nread <= 0)
|
|
return -1;
|
|
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))
|
|
return -1;
|
|
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 */
|
|
return -1;
|
|
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)
|
|
return -1;
|
|
}
|
|
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)
|
|
return -1;
|
|
ttisp->tt_abbrind = (unsigned char) *p++;
|
|
if (ttisp->tt_abbrind < 0 ||
|
|
ttisp->tt_abbrind > sp->charcnt)
|
|
return -1;
|
|
}
|
|
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)
|
|
return -1;
|
|
}
|
|
}
|
|
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)
|
|
return -1;
|
|
}
|
|
}
|
|
/*
|
|
** 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).
|
|
*/
|
|
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;
|
|
int result;
|
|
|
|
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];
|
|
}
|
|
}
|
|
i = 2 * YEARSPERREPEAT;
|
|
sp->goback = sp->goahead = sp->timecnt > i;
|
|
sp->goback = sp->goback && sp->types[i] == sp->types[0] &&
|
|
differ_by_repeat(sp->ats[i], sp->ats[0]);
|
|
sp->goahead = sp->goahead &&
|
|
sp->types[sp->timecnt - 1] == sp->types[sp->timecnt - 1 - i] &&
|
|
differ_by_repeat(sp->ats[sp->timecnt - 1],
|
|
sp->ats[sp->timecnt - 1 - i]);
|
|
return 0;
|
|
}
|
|
|
|
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
|
|
};
|
|
|
|
/*! \brief
|
|
** 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 c;
|
|
|
|
while ((c = *strp) != '\0' && !is_digit(c) && c != ',' && c != '-' &&
|
|
c != '+')
|
|
++strp;
|
|
return strp;
|
|
}
|
|
|
|
/*! \brief
|
|
** 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(const char *strp, const int delim)
|
|
{
|
|
int c;
|
|
|
|
while ((c = *strp) != '\0' && c != delim)
|
|
++strp;
|
|
return strp;
|
|
}
|
|
|
|
/*! \brief
|
|
** 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 *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;
|
|
}
|
|
|
|
/*! \brief
|
|
** 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;
|
|
}
|
|
|
|
/*! \brief
|
|
** 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 *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;
|
|
}
|
|
|
|
/*! \brief
|
|
** 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 *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;
|
|
}
|
|
|
|
/*! \brief
|
|
** 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 *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;
|
|
}
|
|
|
|
/*! \note
|
|
** Given a POSIX section 8-style TZ string, fill in the rule tables as
|
|
** appropriate.
|
|
*/
|
|
|
|
static int tzparse(const char *name, struct state *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);
|
|
stdname = name;
|
|
if (lastditch) {
|
|
stdlen = strlen(name); /* length of standard zone name */
|
|
name += stdlen;
|
|
if (stdlen >= sizeof sp->chars)
|
|
stdlen = (sizeof sp->chars) - 1;
|
|
stdoffset = 0;
|
|
} else {
|
|
if (*name == '<') {
|
|
name++;
|
|
stdname = name;
|
|
name = getqzname(name, '>');
|
|
if (*name != '>')
|
|
return -1;
|
|
stdlen = name - stdname;
|
|
name++;
|
|
} else {
|
|
name = getzname(name);
|
|
stdlen = name - stdname;
|
|
}
|
|
if (*name == '\0')
|
|
return -1;
|
|
name = getoffset(name, &stdoffset);
|
|
if (name == NULL)
|
|
return -1;
|
|
}
|
|
load_result = tzload(TZDEFRULES, sp, FALSE);
|
|
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);
|
|
dstlen = name - dstname; /* length of DST zone name */
|
|
}
|
|
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 int gmtload(struct state *sp)
|
|
{
|
|
if (tzload(gmt, sp, TRUE) != 0)
|
|
return tzparse(gmt, sp, TRUE);
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
static const struct state *ast_tzset(const char *zone)
|
|
{
|
|
struct state *sp;
|
|
|
|
if (ast_strlen_zero(zone))
|
|
zone = "/etc/localtime";
|
|
|
|
AST_LIST_LOCK(&zonelist);
|
|
AST_LIST_TRAVERSE(&zonelist, sp, list) {
|
|
if (!strcmp(sp->name, zone)) {
|
|
AST_LIST_UNLOCK(&zonelist);
|
|
return sp;
|
|
}
|
|
}
|
|
AST_LIST_UNLOCK(&zonelist);
|
|
|
|
if (!(sp = ast_calloc(1, sizeof *sp)))
|
|
return NULL;
|
|
|
|
if (tzload(zone, sp, TRUE) != 0) {
|
|
if (zone[0] == ':' || tzparse(zone, sp, FALSE) != 0)
|
|
(void) gmtload(sp);
|
|
}
|
|
ast_copy_string(sp->name, zone, sizeof(sp->name));
|
|
AST_LIST_LOCK(&zonelist);
|
|
AST_LIST_INSERT_TAIL(&zonelist, sp, list);
|
|
AST_LIST_UNLOCK(&zonelist);
|
|
return sp;
|
|
}
|
|
|
|
/*! \note
|
|
** 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.
|
|
*/
|
|
|
|
static struct ast_tm *localsub(const struct timeval *timep, const long offset, struct ast_tm *tmp, const struct state *sp)
|
|
{
|
|
const struct ttinfo * ttisp;
|
|
int i;
|
|
struct ast_tm * result;
|
|
struct timeval t;
|
|
memcpy(&t, timep, sizeof(t));
|
|
|
|
if (sp == NULL)
|
|
return gmtsub(timep, offset, tmp);
|
|
if ((sp->goback && t.tv_sec < sp->ats[0]) ||
|
|
(sp->goahead && t.tv_sec > sp->ats[sp->timecnt - 1])) {
|
|
struct timeval newt = t;
|
|
time_t seconds;
|
|
time_t tcycles;
|
|
int_fast64_t icycles;
|
|
|
|
if (t.tv_sec < sp->ats[0])
|
|
seconds = sp->ats[0] - t.tv_sec;
|
|
else seconds = t.tv_sec - sp->ats[sp->timecnt - 1];
|
|
--seconds;
|
|
tcycles = seconds / YEARSPERREPEAT / AVGSECSPERYEAR;
|
|
++tcycles;
|
|
icycles = tcycles;
|
|
if (tcycles - icycles >= 1 || icycles - tcycles >= 1)
|
|
return NULL;
|
|
seconds = icycles;
|
|
seconds *= YEARSPERREPEAT;
|
|
seconds *= AVGSECSPERYEAR;
|
|
if (t.tv_sec < sp->ats[0])
|
|
newt.tv_sec += seconds;
|
|
else newt.tv_sec -= seconds;
|
|
if (newt.tv_sec < sp->ats[0] ||
|
|
newt.tv_sec > sp->ats[sp->timecnt - 1])
|
|
return NULL; /* "cannot happen" */
|
|
result = localsub(&newt, offset, tmp, sp);
|
|
if (result == tmp) {
|
|
time_t newy;
|
|
|
|
newy = tmp->tm_year;
|
|
if (t.tv_sec < sp->ats[0])
|
|
newy -= icycles * YEARSPERREPEAT;
|
|
else
|
|
newy += icycles * YEARSPERREPEAT;
|
|
tmp->tm_year = newy;
|
|
if (tmp->tm_year != newy)
|
|
return NULL;
|
|
}
|
|
return result;
|
|
}
|
|
if (sp->timecnt == 0 || t.tv_sec < sp->ats[0]) {
|
|
i = 0;
|
|
while (sp->ttis[i].tt_isdst) {
|
|
if (++i >= sp->typecnt) {
|
|
i = 0;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
int lo = 1;
|
|
int hi = sp->timecnt;
|
|
|
|
while (lo < hi) {
|
|
int mid = (lo + hi) >> 1;
|
|
|
|
if (t.tv_sec < 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);
|
|
*/
|
|
result = timesub(&t, ttisp->tt_gmtoff, sp, tmp);
|
|
tmp->tm_isdst = ttisp->tt_isdst;
|
|
#ifndef SOLARIS /* Solaris doesn't have this element */
|
|
tmp->tm_gmtoff = ttisp->tt_gmtoff;
|
|
#endif
|
|
#ifdef TM_ZONE
|
|
tmp->TM_ZONE = &sp->chars[ttisp->tt_abbrind];
|
|
#endif /* defined TM_ZONE */
|
|
tmp->tm_usec = timep->tv_usec;
|
|
return result;
|
|
}
|
|
|
|
struct ast_tm *ast_localtime(const struct timeval *timep, struct ast_tm *tmp, const char *zone)
|
|
{
|
|
const struct state *sp = ast_tzset(zone);
|
|
memset(tmp, 0, sizeof(*tmp));
|
|
return sp ? localsub(timep, 0L, tmp, sp) : NULL;
|
|
}
|
|
|
|
/*
|
|
** This function provides informaton about daylight savings time
|
|
** for the given timezone. This includes whether it can determine
|
|
** if daylight savings is used for this timezone, the UTC times for
|
|
** when daylight savings transitions, and the offset in seconds from
|
|
** UTC.
|
|
*/
|
|
|
|
void ast_get_dst_info(const time_t * const timep, int *dst_enabled, time_t *dst_start, time_t *dst_end, int *gmt_off, const char * const zone)
|
|
{
|
|
int i;
|
|
int transition1 = -1;
|
|
int transition2 = -1;
|
|
time_t seconds;
|
|
int bounds_exceeded = 0;
|
|
time_t t = *timep;
|
|
const struct state *sp;
|
|
|
|
if (NULL == dst_enabled)
|
|
return;
|
|
*dst_enabled = 0;
|
|
|
|
if (NULL == dst_start || NULL == dst_end || NULL == gmt_off)
|
|
return;
|
|
|
|
*gmt_off = 0;
|
|
|
|
sp = ast_tzset(zone);
|
|
if (NULL == sp)
|
|
return;
|
|
|
|
/* If the desired time exceeds the bounds of the defined time transitions
|
|
* then give give up on determining DST info and simply look for gmt offset
|
|
* This requires that I adjust the given time using increments of Gregorian
|
|
* repeats to place the time within the defined time transitions in the
|
|
* timezone structure.
|
|
*/
|
|
if ((sp->goback && t < sp->ats[0]) ||
|
|
(sp->goahead && t > sp->ats[sp->timecnt - 1])) {
|
|
time_t tcycles;
|
|
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)
|
|
return;
|
|
seconds = icycles;
|
|
seconds *= YEARSPERREPEAT;
|
|
seconds *= AVGSECSPERYEAR;
|
|
if (t < sp->ats[0])
|
|
t += seconds;
|
|
else
|
|
t -= seconds;
|
|
|
|
if (t < sp->ats[0] || t > sp->ats[sp->timecnt - 1])
|
|
return; /* "cannot happen" */
|
|
|
|
bounds_exceeded = 1;
|
|
}
|
|
|
|
if (sp->timecnt == 0 || t < sp->ats[0]) {
|
|
/* I have no transition times or I'm before time */
|
|
*dst_enabled = 0;
|
|
/* Find where I can get gmtoff */
|
|
i = 0;
|
|
while (sp->ttis[i].tt_isdst)
|
|
if (++i >= sp->typecnt) {
|
|
i = 0;
|
|
break;
|
|
}
|
|
*gmt_off = sp->ttis[i].tt_gmtoff;
|
|
return;
|
|
}
|
|
|
|
for (i = 1; i < sp->timecnt; ++i) {
|
|
if (t < sp->ats[i]) {
|
|
transition1 = sp->types[i - 1];
|
|
transition2 = sp->types[i];
|
|
break;
|
|
}
|
|
}
|
|
/* if I found transition times that do not bounded the given time and these correspond to
|
|
or the bounding zones do not reflect a changes in day light savings, then I do not have dst active */
|
|
if (i >= sp->timecnt || 0 > transition1 || 0 > transition2 ||
|
|
(sp->ttis[transition1].tt_isdst == sp->ttis[transition2].tt_isdst)) {
|
|
*dst_enabled = 0;
|
|
*gmt_off = sp->ttis[sp->types[sp->timecnt -1]].tt_gmtoff;
|
|
} else {
|
|
/* I have valid daylight savings information. */
|
|
if(sp->ttis[transition2].tt_isdst)
|
|
*gmt_off = sp->ttis[transition1].tt_gmtoff;
|
|
else
|
|
*gmt_off = sp->ttis[transition2].tt_gmtoff;
|
|
|
|
/* If I adjusted the time earlier, indicate that the dst is invalid */
|
|
if (!bounds_exceeded) {
|
|
*dst_enabled = 1;
|
|
/* Determine which of the bounds is the start of daylight savings and which is the end */
|
|
if(sp->ttis[transition2].tt_isdst) {
|
|
*dst_start = sp->ats[i];
|
|
*dst_end = sp->ats[i -1];
|
|
} else {
|
|
*dst_start = sp->ats[i -1];
|
|
*dst_end = sp->ats[i];
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
** gmtsub is to gmtime as localsub is to localtime.
|
|
*/
|
|
|
|
static struct ast_tm *gmtsub(const struct timeval *timep, const long offset, struct ast_tm *tmp)
|
|
{
|
|
struct ast_tm * result;
|
|
struct state *sp;
|
|
|
|
AST_LIST_LOCK(&zonelist);
|
|
AST_LIST_TRAVERSE(&zonelist, sp, list) {
|
|
if (!strcmp(sp->name, "UTC"))
|
|
break;
|
|
}
|
|
|
|
if (!sp) {
|
|
if (!(sp = (struct state *) ast_calloc(1, sizeof *sp)))
|
|
return NULL;
|
|
gmtload(sp);
|
|
AST_LIST_INSERT_TAIL(&zonelist, sp, list);
|
|
}
|
|
AST_LIST_UNLOCK(&zonelist);
|
|
|
|
result = timesub(timep, offset, sp, tmp);
|
|
#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 = " ";
|
|
else
|
|
tmp->TM_ZONE = sp->chars;
|
|
#endif /* defined TM_ZONE */
|
|
return result;
|
|
}
|
|
|
|
/*! \brief
|
|
** 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.
|
|
*/
|
|
|
|
static int leaps_thru_end_of(const int y)
|
|
{
|
|
return (y >= 0) ? (y / 4 - y / 100 + y / 400) :
|
|
-(leaps_thru_end_of(-(y + 1)) + 1);
|
|
}
|
|
|
|
static struct ast_tm *timesub(const struct timeval *timep, const long offset, const struct state *sp, struct ast_tm *tmp)
|
|
{
|
|
const struct lsinfo * lp;
|
|
time_t tdays;
|
|
int idays; /* unsigned would be so 2003 */
|
|
long rem;
|
|
int y;
|
|
const int * ip;
|
|
long corr;
|
|
int hit;
|
|
int i;
|
|
long seconds;
|
|
|
|
|
|
corr = 0;
|
|
hit = 0;
|
|
i = (sp == NULL) ? 0 : sp->leapcnt;
|
|
while (--i >= 0) {
|
|
lp = &sp->lsis[i];
|
|
if (timep->tv_sec >= lp->ls_trans) {
|
|
if (timep->tv_sec == 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;
|
|
}
|
|
}
|
|
y = EPOCH_YEAR;
|
|
tdays = timep->tv_sec / SECSPERDAY;
|
|
rem = timep->tv_sec - tdays * SECSPERDAY;
|
|
while (tdays < 0 || tdays >= year_lengths[isleap(y)]) {
|
|
int newy;
|
|
time_t tdelta;
|
|
int idelta;
|
|
int leapdays;
|
|
|
|
tdelta = tdays / DAYSPERLYEAR;
|
|
idelta = tdelta;
|
|
if (tdelta - idelta >= 1 || idelta - tdelta >= 1)
|
|
return NULL;
|
|
if (idelta == 0)
|
|
idelta = (tdays < 0) ? -1 : 1;
|
|
newy = y;
|
|
if (increment_overflow(&newy, idelta))
|
|
return NULL;
|
|
leapdays = leaps_thru_end_of(newy - 1) -
|
|
leaps_thru_end_of(y - 1);
|
|
tdays -= ((time_t) newy - y) * DAYSPERNYEAR;
|
|
tdays -= leapdays;
|
|
y = newy;
|
|
}
|
|
|
|
seconds = tdays * SECSPERDAY + 0.5;
|
|
tdays = seconds / SECSPERDAY;
|
|
rem += seconds - tdays * SECSPERDAY;
|
|
|
|
/*
|
|
** Given the range, we can now fearlessly cast...
|
|
*/
|
|
idays = tdays;
|
|
rem += offset - corr;
|
|
while (rem < 0) {
|
|
rem += SECSPERDAY;
|
|
--idays;
|
|
}
|
|
while (rem >= SECSPERDAY) {
|
|
rem -= SECSPERDAY;
|
|
++idays;
|
|
}
|
|
while (idays < 0) {
|
|
if (increment_overflow(&y, -1))
|
|
return NULL;
|
|
idays += year_lengths[isleap(y)];
|
|
}
|
|
while (idays >= year_lengths[isleap(y)]) {
|
|
idays -= year_lengths[isleap(y)];
|
|
if (increment_overflow(&y, 1))
|
|
return NULL;
|
|
}
|
|
tmp->tm_year = y;
|
|
if (increment_overflow(&tmp->tm_year, -TM_YEAR_BASE))
|
|
return NULL;
|
|
tmp->tm_yday = idays;
|
|
/*
|
|
** The "extra" mods below avoid overflow problems.
|
|
*/
|
|
tmp->tm_wday = EPOCH_WDAY +
|
|
((y - EPOCH_YEAR) % DAYSPERWEEK) *
|
|
(DAYSPERNYEAR % DAYSPERWEEK) +
|
|
leaps_thru_end_of(y - 1) -
|
|
leaps_thru_end_of(EPOCH_YEAR - 1) +
|
|
idays;
|
|
tmp->tm_wday %= DAYSPERWEEK;
|
|
if (tmp->tm_wday < 0)
|
|
tmp->tm_wday += DAYSPERWEEK;
|
|
tmp->tm_hour = (int) (rem / SECSPERHOUR);
|
|
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;
|
|
ip = mon_lengths[isleap(y)];
|
|
for (tmp->tm_mon = 0; idays >= ip[tmp->tm_mon]; ++(tmp->tm_mon))
|
|
idays -= ip[tmp->tm_mon];
|
|
tmp->tm_mday = (int) (idays + 1);
|
|
tmp->tm_isdst = 0;
|
|
#ifdef TM_GMTOFF
|
|
tmp->TM_GMTOFF = offset;
|
|
#endif /* defined TM_GMTOFF */
|
|
tmp->tm_usec = timep->tv_usec;
|
|
return tmp;
|
|
}
|
|
|
|
/*! \note
|
|
** 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).
|
|
*/
|
|
|
|
/*! \brief
|
|
** 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 *tensptr, int *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 *tensptr, int *unitsptr, const int base)
|
|
{
|
|
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 ast_tm *atmp, const struct ast_tm *btmp)
|
|
{
|
|
int result;
|
|
|
|
if ((result = (atmp->tm_year - btmp->tm_year)) == 0 &&
|
|
(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)) == 0)
|
|
result = atmp->tm_usec - btmp->tm_usec;
|
|
return result;
|
|
}
|
|
|
|
static struct timeval time2sub(struct ast_tm *tmp, struct ast_tm * (* const funcp) (const struct timeval *, long, struct ast_tm *, const struct state *), const long offset, int *okayp, const int do_norm_secs, const struct state *sp)
|
|
{
|
|
int dir;
|
|
int i, j;
|
|
int saved_seconds;
|
|
long li;
|
|
time_t lo;
|
|
time_t hi;
|
|
long y;
|
|
struct timeval newt = { 0, 0 };
|
|
struct timeval t = { 0, 0 };
|
|
struct ast_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;
|
|
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.tv_sec = lo / 2 + hi / 2;
|
|
if (t.tv_sec < lo)
|
|
t.tv_sec = lo;
|
|
else if (t.tv_sec > hi)
|
|
t.tv_sec = hi;
|
|
if ((*funcp)(&t, offset, &mytm, sp) == NULL) {
|
|
/*
|
|
** Assume that t is too extreme to be represented in
|
|
** a struct ast_tm; arrange things so that it is less
|
|
** extreme on the next pass.
|
|
*/
|
|
dir = (t.tv_sec > 0) ? 1 : -1;
|
|
} else dir = tmcomp(&mytm, &yourtm);
|
|
if (dir != 0) {
|
|
if (t.tv_sec == lo) {
|
|
++t.tv_sec;
|
|
if (t.tv_sec <= lo)
|
|
return WRONG;
|
|
++lo;
|
|
} else if (t.tv_sec == hi) {
|
|
--t.tv_sec;
|
|
if (t.tv_sec >= hi)
|
|
return WRONG;
|
|
--hi;
|
|
}
|
|
if (lo > hi)
|
|
return WRONG;
|
|
if (dir > 0)
|
|
hi = t.tv_sec;
|
|
else lo = t.tv_sec;
|
|
continue;
|
|
}
|
|
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.
|
|
*/
|
|
/*
|
|
** The (void *) casts are the benefit of SunOS 3.3 on Sun 2's.
|
|
*/
|
|
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.tv_sec = t.tv_sec + sp->ttis[j].tt_gmtoff -
|
|
sp->ttis[i].tt_gmtoff;
|
|
if ((*funcp)(&newt, offset, &mytm, sp) == NULL)
|
|
continue;
|
|
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.tv_sec = t.tv_sec + saved_seconds;
|
|
if ((newt.tv_sec < t.tv_sec) != (saved_seconds < 0))
|
|
return WRONG;
|
|
t.tv_sec = newt.tv_sec;
|
|
if ((*funcp)(&t, offset, tmp, sp))
|
|
*okayp = TRUE;
|
|
return t;
|
|
}
|
|
|
|
static struct timeval time2(struct ast_tm *tmp, struct ast_tm * (* const funcp) (const struct timeval *, long, struct ast_tm*, const struct state *sp), const long offset, int *okayp, const struct state *sp)
|
|
{
|
|
struct timeval t;
|
|
|
|
/*! \note
|
|
** 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, sp);
|
|
return *okayp ? t : time2sub(tmp, funcp, offset, okayp, TRUE, sp);
|
|
}
|
|
|
|
static struct timeval time1(struct ast_tm *tmp, struct ast_tm * (* const funcp) (const struct timeval *, long, struct ast_tm *, const struct state *), const long offset, const struct state *sp)
|
|
{
|
|
struct timeval t;
|
|
int samei, otheri;
|
|
int sameind, otherind;
|
|
int i;
|
|
int nseen;
|
|
int seen[TZ_MAX_TYPES];
|
|
int types[TZ_MAX_TYPES];
|
|
int okay;
|
|
|
|
if (tmp->tm_isdst > 1)
|
|
tmp->tm_isdst = 1;
|
|
t = time2(tmp, funcp, offset, &okay, sp);
|
|
#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 ast_tm" that's bad.
|
|
** We try to divine the type they started from and adjust to the
|
|
** type they need.
|
|
*/
|
|
if (sp == NULL)
|
|
return WRONG;
|
|
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, sp);
|
|
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;
|
|
}
|
|
|
|
struct timeval ast_mktime(struct ast_tm *tmp, const char *zone)
|
|
{
|
|
const struct state *sp;
|
|
if (!(sp = ast_tzset(zone)))
|
|
return WRONG;
|
|
return time1(tmp, localsub, 0L, sp);
|
|
}
|
|
|
|
int ast_strftime(char *buf, size_t len, const char *tmp, const struct ast_tm *tm)
|
|
{
|
|
size_t fmtlen = strlen(tmp) + 1;
|
|
char *format = ast_calloc(1, fmtlen), *fptr = format, *newfmt;
|
|
int decimals = -1, i, res;
|
|
long fraction;
|
|
|
|
if (!format)
|
|
return -1;
|
|
for (; *tmp; tmp++) {
|
|
if (*tmp == '%') {
|
|
switch (tmp[1]) {
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
if (tmp[2] != 'q')
|
|
goto defcase;
|
|
decimals = tmp[1] - '0';
|
|
tmp++;
|
|
/* Fall through */
|
|
case 'q': /* Milliseconds */
|
|
if (decimals == -1)
|
|
decimals = 3;
|
|
|
|
/* Juggle some memory to fit the item */
|
|
newfmt = ast_realloc(format, fmtlen + decimals);
|
|
if (!newfmt) {
|
|
ast_free(format);
|
|
return -1;
|
|
}
|
|
fptr = fptr - format + newfmt;
|
|
format = newfmt;
|
|
fmtlen += decimals;
|
|
|
|
/* Reduce the fraction of time to the accuracy needed */
|
|
for (i = 6, fraction = tm->tm_usec; i > decimals; i--)
|
|
fraction /= 10;
|
|
fptr += sprintf(fptr, "%0*ld", decimals, fraction);
|
|
|
|
/* Reset, in case more than one 'q' specifier exists */
|
|
decimals = -1;
|
|
tmp++;
|
|
break;
|
|
default:
|
|
goto defcase;
|
|
}
|
|
} else
|
|
defcase: *fptr++ = *tmp;
|
|
}
|
|
*fptr = '\0';
|
|
#undef strftime
|
|
res = (int)strftime(buf, len, format, (struct tm *)tm);
|
|
ast_free(format);
|
|
return res;
|
|
}
|
|
|
|
char *ast_strptime(const char *s, const char *format, struct ast_tm *tm)
|
|
{
|
|
struct tm tm2 = { 0, };
|
|
char *res = strptime(s, format, &tm2);
|
|
memcpy(tm, &tm2, sizeof(*tm));
|
|
tm->tm_usec = 0;
|
|
/* strptime(3) doesn't set .tm_isdst correctly, so to force ast_mktime(3)
|
|
* to deal with it correctly, we set it to -1. */
|
|
tm->tm_isdst = -1;
|
|
return res;
|
|
}
|
|
|