php_date.c

/*
   +----------------------------------------------------------------------+
   | Copyright (c) The PHP Group                                          |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | https://www.php.net/license/3_01.txt                                 |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Derick Rethans <derick@derickrethans.nl>                    |
   +----------------------------------------------------------------------+
 */

#include "php.h"
#include "php_streams.h"
#include "php_main.h"
#include "php_globals.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "ext/standard/php_versioning.h"
#include "ext/standard/php_math.h"
#include "php_date.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
#include "lib/timelib.h"
#include "lib/timelib_private.h"
#ifndef PHP_WIN32
#include <time.h>
#else
#include "win32/time.h"
#endif

#ifdef PHP_WIN32
static __inline __int64 php_date_llabs( __int64 i ) { return i >= 0? i: -i; }
#elif defined(__GNUC__) && __GNUC__ < 3
static __inline __int64_t php_date_llabs( __int64_t i ) { return i >= 0 ? i : -i; }
#else
static inline long long php_date_llabs( long long i ) { return i >= 0 ? i : -i; }
#endif

#ifdef PHP_WIN32
#define DATE_I64_BUF_LEN 65
# define DATE_I64A(i, s, len) _i64toa_s(i, s, len, 10)
# define DATE_A64I(i, s) i = _atoi64(s)
#else
#define DATE_I64_BUF_LEN 65
# define DATE_I64A(i, s, len) \
	do { \
		int st = snprintf(s, len, "%lld", i); \
		s[st] = '\0'; \
	} while (0);
#define DATE_A64I(i, s) i = strtoll(s, NULL, 10)
#endif

PHPAPI time_t php_time(void)
{
#ifdef HAVE_GETTIMEOFDAY
	struct timeval tm;

	if (UNEXPECTED(gettimeofday(&tm, NULL) != SUCCESS)) {
		/* fallback, can't reasonably happen */
		return time(NULL);
	}

	return tm.tv_sec;
#else
	return time(NULL);
#endif
}

#include "php_date_arginfo.h"

static char* guess_timezone(const timelib_tzdb *tzdb);
static void date_register_classes(void);
/* }}} */

ZEND_DECLARE_MODULE_GLOBALS(date)
static PHP_GINIT_FUNCTION(date);

/* True global */
timelib_tzdb *php_date_global_timezone_db;
int php_date_global_timezone_db_enabled;

#define DATE_DEFAULT_LATITUDE "31.7667"
#define DATE_DEFAULT_LONGITUDE "35.2333"

/* on 90'50; common sunset declaration (start of sun body appear) */
#define DATE_SUNSET_ZENITH "90.833333"

/* on 90'50; common sunrise declaration (sun body disappeared) */
#define DATE_SUNRISE_ZENITH "90.833333"

static PHP_INI_MH(OnUpdate_date_timezone);

/* {{{ INI Settings */
PHP_INI_BEGIN()
	STD_PHP_INI_ENTRY("date.timezone", "", PHP_INI_ALL, OnUpdate_date_timezone, default_timezone, zend_date_globals, date_globals)
	PHP_INI_ENTRY("date.default_latitude",           DATE_DEFAULT_LATITUDE,        PHP_INI_ALL, NULL)
	PHP_INI_ENTRY("date.default_longitude",          DATE_DEFAULT_LONGITUDE,       PHP_INI_ALL, NULL)
	PHP_INI_ENTRY("date.sunset_zenith",              DATE_SUNSET_ZENITH,           PHP_INI_ALL, NULL)
	PHP_INI_ENTRY("date.sunrise_zenith",             DATE_SUNRISE_ZENITH,          PHP_INI_ALL, NULL)
PHP_INI_END()
/* }}} */

zend_class_entry *date_ce_date, *date_ce_timezone, *date_ce_interval, *date_ce_period;
zend_class_entry *date_ce_immutable, *date_ce_interface;


PHPAPI zend_class_entry *php_date_get_date_ce(void)
{
	return date_ce_date;
}

PHPAPI zend_class_entry *php_date_get_immutable_ce(void)
{
	return date_ce_immutable;
}

PHPAPI zend_class_entry *php_date_get_interface_ce(void)
{
	return date_ce_interface;
}

PHPAPI zend_class_entry *php_date_get_timezone_ce(void)
{
	return date_ce_timezone;
}

PHPAPI zend_class_entry *php_date_get_interval_ce(void)
{
	return date_ce_interval;
}

PHPAPI zend_class_entry *php_date_get_period_ce(void)
{
	return date_ce_period;
}

static zend_object_handlers date_object_handlers_date;
static zend_object_handlers date_object_handlers_immutable;
static zend_object_handlers date_object_handlers_timezone;
static zend_object_handlers date_object_handlers_interval;
static zend_object_handlers date_object_handlers_period;

#define DATE_CHECK_INITIALIZED(member, class_name) \
	if (!(member)) { \
		zend_throw_error(NULL, "The " #class_name " object has not been correctly initialized by its constructor"); \
		RETURN_THROWS(); \
	}

static void date_object_free_storage_date(zend_object *object);
static void date_object_free_storage_timezone(zend_object *object);
static void date_object_free_storage_interval(zend_object *object);
static void date_object_free_storage_period(zend_object *object);

static zend_object *date_object_new_date(zend_class_entry *class_type);
static zend_object *date_object_new_timezone(zend_class_entry *class_type);
static zend_object *date_object_new_interval(zend_class_entry *class_type);
static zend_object *date_object_new_period(zend_class_entry *class_type);

static zend_object *date_object_clone_date(zend_object *this_ptr);
static zend_object *date_object_clone_timezone(zend_object *this_ptr);
static zend_object *date_object_clone_interval(zend_object *this_ptr);
static zend_object *date_object_clone_period(zend_object *this_ptr);

static int date_object_compare_date(zval *d1, zval *d2);
static HashTable *date_object_get_gc(zend_object *object, zval **table, int *n);
static HashTable *date_object_get_properties_for(zend_object *object, zend_prop_purpose purpose);
static HashTable *date_object_get_gc_interval(zend_object *object, zval **table, int *n);
static HashTable *date_object_get_properties_interval(zend_object *object);
static HashTable *date_object_get_gc_period(zend_object *object, zval **table, int *n);
static HashTable *date_object_get_properties_period(zend_object *object);
static HashTable *date_object_get_properties_for_timezone(zend_object *object, zend_prop_purpose purpose);
static HashTable *date_object_get_gc_timezone(zend_object *object, zval **table, int *n);
static HashTable *date_object_get_debug_info_timezone(zend_object *object, int *is_temp);
static void php_timezone_to_string(php_timezone_obj *tzobj, zval *zv);

static int date_interval_compare_objects(zval *o1, zval *o2);
static zval *date_interval_read_property(zend_object *object, zend_string *member, int type, void **cache_slot, zval *rv);
static zval *date_interval_write_property(zend_object *object, zend_string *member, zval *value, void **cache_slot);
static zval *date_interval_get_property_ptr_ptr(zend_object *object, zend_string *member, int type, void **cache_slot);
static zval *date_period_read_property(zend_object *object, zend_string *name, int type, void **cache_slot, zval *rv);
static zval *date_period_write_property(zend_object *object, zend_string *name, zval *value, void **cache_slot);
static zval *date_period_get_property_ptr_ptr(zend_object *object, zend_string *name, int type, void **cache_slot);

static int date_object_compare_timezone(zval *tz1, zval *tz2);

/* {{{ Module struct */
zend_module_entry date_module_entry = {
	STANDARD_MODULE_HEADER_EX,
	NULL,
	NULL,
	"date",                     /* extension name */
	ext_functions,              /* function list */
	PHP_MINIT(date),            /* process startup */
	PHP_MSHUTDOWN(date),        /* process shutdown */
	PHP_RINIT(date),            /* request startup */
	PHP_RSHUTDOWN(date),        /* request shutdown */
	PHP_MINFO(date),            /* extension info */
	PHP_DATE_VERSION,                /* extension version */
	PHP_MODULE_GLOBALS(date),   /* globals descriptor */
	PHP_GINIT(date),            /* globals ctor */
	NULL,                       /* globals dtor */
	ZEND_MODULE_POST_ZEND_DEACTIVATE_N(date), /* post deactivate */
	STANDARD_MODULE_PROPERTIES_EX
};
/* }}} */


/* {{{ PHP_GINIT_FUNCTION */
static PHP_GINIT_FUNCTION(date)
{
	date_globals->default_timezone = NULL;
	date_globals->timezone = NULL;
	date_globals->tzcache = NULL;
	date_globals->timezone_valid = 0;
}
/* }}} */


static void _php_date_tzinfo_dtor(zval *zv) /* {{{ */
{
	timelib_tzinfo *tzi = (timelib_tzinfo*)Z_PTR_P(zv);

	timelib_tzinfo_dtor(tzi);
} /* }}} */

/* {{{ PHP_RINIT_FUNCTION */
PHP_RINIT_FUNCTION(date)
{
	if (DATEG(timezone)) {
		efree(DATEG(timezone));
	}
	DATEG(timezone) = NULL;
	DATEG(tzcache) = NULL;
	DATEG(last_errors) = NULL;

	return SUCCESS;
}
/* }}} */

/* {{{ PHP_RSHUTDOWN_FUNCTION */
PHP_RSHUTDOWN_FUNCTION(date)
{
	if (DATEG(timezone)) {
		efree(DATEG(timezone));
	}
	DATEG(timezone) = NULL;

	return SUCCESS;
}
/* }}} */

ZEND_MODULE_POST_ZEND_DEACTIVATE_D(date)
{
	if (DATEG(tzcache)) {
		zend_hash_destroy(DATEG(tzcache));
		FREE_HASHTABLE(DATEG(tzcache));
		DATEG(tzcache) = NULL;
	}

	if (DATEG(last_errors)) {
		timelib_error_container_dtor(DATEG(last_errors));
		DATEG(last_errors) = NULL;
	}

	return SUCCESS;
}

#define DATE_TIMEZONEDB      php_date_global_timezone_db ? php_date_global_timezone_db : timelib_builtin_db()

/*
 * RFC822, Section 5.1: http://www.ietf.org/rfc/rfc822.txt
 *  date-time   =  [ day "," ] date time        ; dd mm yy hh:mm:ss zzz
 *  day         =  "Mon"  / "Tue" /  "Wed"  / "Thu"  /  "Fri"  / "Sat" /  "Sun"
 *  date        =  1*2DIGIT month 2DIGIT        ; day month year e.g. 20 Jun 82
 *  month       =  "Jan"  /  "Feb" /  "Mar"  /  "Apr"  /  "May"  /  "Jun" /  "Jul"  /  "Aug"  /  "Sep"  /  "Oct" /  "Nov"  /  "Dec"
 *  time        =  hour zone                    ; ANSI and Military
 *  hour        =  2DIGIT ":" 2DIGIT [":" 2DIGIT] ; 00:00:00 - 23:59:59
 *  zone        =  "UT"  / "GMT"  /  "EST" / "EDT"  /  "CST" / "CDT"  /  "MST" / "MDT"  /  "PST" / "PDT"  /  1ALPHA  / ( ("+" / "-") 4DIGIT )
 */
#define DATE_FORMAT_RFC822   "D, d M y H:i:s O"

/*
 * RFC850, Section 2.1.4: http://www.ietf.org/rfc/rfc850.txt
 *  Format must be acceptable both to the ARPANET and to the getdate routine.
 *  One format that is acceptable to both is Weekday, DD-Mon-YY HH:MM:SS TIMEZONE
 *  TIMEZONE can be any timezone name (3 or more letters)
 */
#define DATE_FORMAT_RFC850   "l, d-M-y H:i:s T"

/*
 * RFC1036, Section 2.1.2: http://www.ietf.org/rfc/rfc1036.txt
 *  Its format must be acceptable both in RFC-822 and to the getdate(3)
 *  Wdy, DD Mon YY HH:MM:SS TIMEZONE
 *  There is no hope of having a complete list of timezones.  Universal
 *  Time (GMT), the North American timezones (PST, PDT, MST, MDT, CST,
 *  CDT, EST, EDT) and the +/-hhmm offset specified in RFC-822 should be supported.
 */
#define DATE_FORMAT_RFC1036  "D, d M y H:i:s O"

/*
 * RFC1123, Section 5.2.14: http://www.ietf.org/rfc/rfc1123.txt
 *  RFC-822 Date and Time Specification: RFC-822 Section 5
 *  The syntax for the date is hereby changed to: date = 1*2DIGIT month 2*4DIGIT
 */
#define DATE_FORMAT_RFC1123  "D, d M Y H:i:s O"

/*
 * RFC7231, Section 7.1.1: http://tools.ietf.org/html/rfc7231
 */
#define DATE_FORMAT_RFC7231  "D, d M Y H:i:s \\G\\M\\T"

/*
 * RFC2822, Section 3.3: http://www.ietf.org/rfc/rfc2822.txt
 *  FWS             =       ([*WSP CRLF] 1*WSP) /   ; Folding white space
 *  CFWS            =       *([FWS] comment) (([FWS] comment) / FWS)
 *
 *  date-time       =       [ day-of-week "," ] date FWS time [CFWS]
 *  day-of-week     =       ([FWS] day-name)
 *  day-name        =       "Mon" / "Tue" / "Wed" / "Thu" / "Fri" / "Sat" / "Sun"
 *  date            =       day month year
 *  year            =       4*DIGIT
 *  month           =       (FWS month-name FWS)
 *  month-name      =       "Jan" / "Feb" / "Mar" / "Apr" / "May" / "Jun" / "Jul" / "Aug" / "Sep" / "Oct" / "Nov" / "Dec"
 *  day             =       ([FWS] 1*2DIGIT)
 *  time            =       time-of-day FWS zone
 *  time-of-day     =       hour ":" minute [ ":" second ]
 *  hour            =       2DIGIT
 *  minute          =       2DIGIT
 *  second          =       2DIGIT
 *  zone            =       (( "+" / "-" ) 4DIGIT)
 */
#define DATE_FORMAT_RFC2822  "D, d M Y H:i:s O"
/*
 * RFC3339, Section 5.6: http://www.ietf.org/rfc/rfc3339.txt
 *  date-fullyear   = 4DIGIT
 *  date-month      = 2DIGIT  ; 01-12
 *  date-mday       = 2DIGIT  ; 01-28, 01-29, 01-30, 01-31 based on month/year
 *
 *  time-hour       = 2DIGIT  ; 00-23
 *  time-minute     = 2DIGIT  ; 00-59
 *  time-second     = 2DIGIT  ; 00-58, 00-59, 00-60 based on leap second rules
 *
 *  time-secfrac    = "." 1*DIGIT
 *  time-numoffset  = ("+" / "-") time-hour ":" time-minute
 *  time-offset     = "Z" / time-numoffset
 *
 *  partial-time    = time-hour ":" time-minute ":" time-second [time-secfrac]
 *  full-date       = date-fullyear "-" date-month "-" date-mday
 *  full-time       = partial-time time-offset
 *
 *  date-time       = full-date "T" full-time
 */
#define DATE_FORMAT_RFC3339  "Y-m-d\\TH:i:sP"

#define DATE_FORMAT_ISO8601  "Y-m-d\\TH:i:sO"

/*
 * RFC3339, Appendix A: http://www.ietf.org/rfc/rfc3339.txt
 *  ISO 8601 also requires (in section 5.3.1.3) that a decimal fraction
 *  be proceeded by a "0" if less than unity.  Annex B.2 of ISO 8601
 *  gives examples where the decimal fractions are not preceded by a "0".
 *  This grammar assumes section 5.3.1.3 is correct and that Annex B.2 is
 *  in error.
 */
#define DATE_FORMAT_RFC3339_EXTENDED  "Y-m-d\\TH:i:s.vP"

/*
 * This comes from various sources that like to contradict. I'm going with the
 * format here because of:
 * http://msdn.microsoft.com/en-us/library/windows/desktop/aa384321%28v=vs.85%29.aspx
 * and http://curl.haxx.se/rfc/cookie_spec.html
 */
#define DATE_FORMAT_COOKIE   "l, d-M-Y H:i:s T"

#define SUNFUNCS_RET_TIMESTAMP 0
#define SUNFUNCS_RET_STRING    1
#define SUNFUNCS_RET_DOUBLE    2

/* {{{ PHP_MINIT_FUNCTION */
PHP_MINIT_FUNCTION(date)
{
	REGISTER_INI_ENTRIES();
	date_register_classes();
/*
 * RFC4287, Section 3.3: http://www.ietf.org/rfc/rfc4287.txt
 *   A Date construct is an element whose content MUST conform to the
 *   "date-time" production in [RFC3339].  In addition, an uppercase "T"
 *   character MUST be used to separate date and time, and an uppercase
 *   "Z" character MUST be present in the absence of a numeric time zone offset.
 */
	REGISTER_STRING_CONSTANT("DATE_ATOM",    DATE_FORMAT_RFC3339, CONST_CS | CONST_PERSISTENT);
/*
 * Preliminary specification: http://wp.netscape.com/newsref/std/cookie_spec.html
 *   "This is based on RFC 822, RFC 850,  RFC 1036, and  RFC 1123,
 *   with the variations that the only legal time zone is GMT
 *   and the separators between the elements of the date must be dashes."
 */
	REGISTER_STRING_CONSTANT("DATE_COOKIE",  DATE_FORMAT_COOKIE,  CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_ISO8601", DATE_FORMAT_ISO8601, CONST_CS | CONST_PERSISTENT);

	REGISTER_STRING_CONSTANT("DATE_RFC822",  DATE_FORMAT_RFC822,  CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_RFC850",  DATE_FORMAT_RFC850,  CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_RFC1036", DATE_FORMAT_RFC1036, CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_RFC1123", DATE_FORMAT_RFC1123, CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_RFC7231", DATE_FORMAT_RFC7231, CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_RFC2822", DATE_FORMAT_RFC2822, CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_RFC3339", DATE_FORMAT_RFC3339, CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_RFC3339_EXTENDED", DATE_FORMAT_RFC3339_EXTENDED, CONST_CS | CONST_PERSISTENT);

/*
 * RSS 2.0 Specification: http://blogs.law.harvard.edu/tech/rss
 *   "All date-times in RSS conform to the Date and Time Specification of RFC 822,
 *   with the exception that the year may be expressed with two characters or four characters (four preferred)"
 */
	REGISTER_STRING_CONSTANT("DATE_RSS",     DATE_FORMAT_RFC1123, CONST_CS | CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("DATE_W3C",     DATE_FORMAT_RFC3339, CONST_CS | CONST_PERSISTENT);

	REGISTER_LONG_CONSTANT("SUNFUNCS_RET_TIMESTAMP", SUNFUNCS_RET_TIMESTAMP, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("SUNFUNCS_RET_STRING", SUNFUNCS_RET_STRING, CONST_CS | CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("SUNFUNCS_RET_DOUBLE", SUNFUNCS_RET_DOUBLE, CONST_CS | CONST_PERSISTENT);

	php_date_global_timezone_db = NULL;
	php_date_global_timezone_db_enabled = 0;
	DATEG(last_errors) = NULL;
	return SUCCESS;
}
/* }}} */

/* {{{ PHP_MSHUTDOWN_FUNCTION */
PHP_MSHUTDOWN_FUNCTION(date)
{
	UNREGISTER_INI_ENTRIES();

	if (DATEG(last_errors)) {
		timelib_error_container_dtor(DATEG(last_errors));
	}

#ifndef ZTS
	DATEG(default_timezone) = NULL;
#endif

	return SUCCESS;
}
/* }}} */

/* {{{ PHP_MINFO_FUNCTION */
PHP_MINFO_FUNCTION(date)
{
	const timelib_tzdb *tzdb = DATE_TIMEZONEDB;

	php_info_print_table_start();
	php_info_print_table_row(2, "date/time support", "enabled");
	php_info_print_table_row(2, "timelib version", TIMELIB_ASCII_VERSION);
	php_info_print_table_row(2, "\"Olson\" Timezone Database Version", tzdb->version);
	php_info_print_table_row(2, "Timezone Database", php_date_global_timezone_db_enabled ? "external" : "internal");
	php_info_print_table_row(2, "Default timezone", guess_timezone(tzdb));
	php_info_print_table_end();

	DISPLAY_INI_ENTRIES();
}
/* }}} */

/* {{{ Timezone Cache functions */
static timelib_tzinfo *php_date_parse_tzfile(const char *formal_tzname, const timelib_tzdb *tzdb)
{
	timelib_tzinfo *tzi;
	int dummy_error_code;

	if(!DATEG(tzcache)) {
		ALLOC_HASHTABLE(DATEG(tzcache));
		zend_hash_init(DATEG(tzcache), 4, NULL, _php_date_tzinfo_dtor, 0);
	}

	if ((tzi = zend_hash_str_find_ptr(DATEG(tzcache), formal_tzname, strlen(formal_tzname))) != NULL) {
		return tzi;
	}

	tzi = timelib_parse_tzfile(formal_tzname, tzdb, &dummy_error_code);
	if (tzi) {
		zend_hash_str_add_ptr(DATEG(tzcache), formal_tzname, strlen(formal_tzname), tzi);
	}
	return tzi;
}

timelib_tzinfo *php_date_parse_tzfile_wrapper(const char *formal_tzname, const timelib_tzdb *tzdb, int *dummy_error_code)
{
	return php_date_parse_tzfile(formal_tzname, tzdb);
}
/* }}} */

/* Callback to check the date.timezone only when changed increases performance */
/* {{{ static PHP_INI_MH(OnUpdate_date_timezone) */
static PHP_INI_MH(OnUpdate_date_timezone)
{
	if (OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage) == FAILURE) {
		return FAILURE;
	}

	DATEG(timezone_valid) = 0;
	if (stage == PHP_INI_STAGE_RUNTIME) {
		if (!timelib_timezone_id_is_valid(DATEG(default_timezone), DATE_TIMEZONEDB)) {
			if (DATEG(default_timezone) && *DATEG(default_timezone)) {
				php_error_docref(NULL, E_WARNING, "Invalid date.timezone value '%s', we selected the timezone 'UTC' for now.", DATEG(default_timezone));
			}
		} else {
			DATEG(timezone_valid) = 1;
		}
	}

	return SUCCESS;
}
/* }}} */

/* {{{ Helper functions */
static char* guess_timezone(const timelib_tzdb *tzdb)
{
	/* Checking configure timezone */
	if (DATEG(timezone) && (strlen(DATEG(timezone))) > 0) {
		return DATEG(timezone);
	}
	/* Check config setting for default timezone */
	if (!DATEG(default_timezone)) {
		/* Special case: ext/date wasn't initialized yet */
		zval *ztz;

		if (NULL != (ztz = cfg_get_entry("date.timezone", sizeof("date.timezone")))
			&& Z_TYPE_P(ztz) == IS_STRING && Z_STRLEN_P(ztz) > 0 && timelib_timezone_id_is_valid(Z_STRVAL_P(ztz), tzdb)) {
			return Z_STRVAL_P(ztz);
		}
	} else if (*DATEG(default_timezone)) {
		if (DATEG(timezone_valid) == 1) {
			return DATEG(default_timezone);
		}

		if (!timelib_timezone_id_is_valid(DATEG(default_timezone), tzdb)) {
			php_error_docref(NULL, E_WARNING, "Invalid date.timezone value '%s', we selected the timezone 'UTC' for now.", DATEG(default_timezone));
			return "UTC";
		}

		DATEG(timezone_valid) = 1;
		return DATEG(default_timezone);
	}
	/* Fallback to UTC */
	return "UTC";
}

PHPAPI timelib_tzinfo *get_timezone_info(void)
{
	char *tz;
	timelib_tzinfo *tzi;

	tz = guess_timezone(DATE_TIMEZONEDB);
	tzi = php_date_parse_tzfile(tz, DATE_TIMEZONEDB);
	if (! tzi) {
		zend_throw_error(NULL, "Timezone database is corrupt. Please file a bug report as this should never happen");
	}
	return tzi;
}
/* }}} */


/* {{{ date() and gmdate() data */
#include "zend_smart_str.h"

static const char * const mon_full_names[] = {
	"January", "February", "March", "April",
	"May", "June", "July", "August",
	"September", "October", "November", "December"
};

static const char * const mon_short_names[] = {
	"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

static const char * const day_full_names[] = {
	"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
};

static const char * const day_short_names[] = {
	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};

static char *english_suffix(timelib_sll number)
{
	if (number >= 10 && number <= 19) {
		return "th";
	} else {
		switch (number % 10) {
			case 1: return "st";
			case 2: return "nd";
			case 3: return "rd";
		}
	}
	return "th";
}
/* }}} */

/* {{{ day of week helpers */
static const char *php_date_full_day_name(timelib_sll y, timelib_sll m, timelib_sll d)
{
	timelib_sll day_of_week = timelib_day_of_week(y, m, d);
	if (day_of_week < 0) {
		return "Unknown";
	}
	return day_full_names[day_of_week];
}

static const char *php_date_short_day_name(timelib_sll y, timelib_sll m, timelib_sll d)
{
	timelib_sll day_of_week = timelib_day_of_week(y, m, d);
	if (day_of_week < 0) {
		return "Unknown";
	}
	return day_short_names[day_of_week];
}
/* }}} */

/* {{{ date_format - (gm)date helper */
static zend_string *date_format(const char *format, size_t format_len, timelib_time *t, int localtime)
{
	smart_str            string = {0};
	size_t               i;
	int                  length = 0;
	char                 buffer[97];
	timelib_time_offset *offset = NULL;
	timelib_sll          isoweek, isoyear;
	int                  rfc_colon;
	int                  weekYearSet = 0;

	if (!format_len) {
		return ZSTR_EMPTY_ALLOC();
	}

	if (localtime) {
		if (t->zone_type == TIMELIB_ZONETYPE_ABBR) {
			offset = timelib_time_offset_ctor();
			offset->offset = (t->z + (t->dst * 3600));
			offset->leap_secs = 0;
			offset->is_dst = t->dst;
			offset->abbr = timelib_strdup(t->tz_abbr);
		} else if (t->zone_type == TIMELIB_ZONETYPE_OFFSET) {
			offset = timelib_time_offset_ctor();
			offset->offset = (t->z);
			offset->leap_secs = 0;
			offset->is_dst = 0;
			offset->abbr = timelib_malloc(9); /* GMT±xxxx\0 */
			snprintf(offset->abbr, 9, "GMT%c%02d%02d",
			                          (offset->offset < 0) ? '-' : '+',
			                          abs(offset->offset / 3600),
			                          abs((offset->offset % 3600) / 60));
		} else {
			offset = timelib_get_time_zone_info(t->sse, t->tz_info);
		}
	}

	for (i = 0; i < format_len; i++) {
		rfc_colon = 0;
		switch (format[i]) {
			/* day */
			case 'd': length = slprintf(buffer, sizeof(buffer), "%02d", (int) t->d); break;
			case 'D': length = slprintf(buffer, sizeof(buffer), "%s", php_date_short_day_name(t->y, t->m, t->d)); break;
			case 'j': length = slprintf(buffer, sizeof(buffer), "%d", (int) t->d); break;
			case 'l': length = slprintf(buffer, sizeof(buffer), "%s", php_date_full_day_name(t->y, t->m, t->d)); break;
			case 'S': length = slprintf(buffer, sizeof(buffer), "%s", english_suffix(t->d)); break;
			case 'w': length = slprintf(buffer, sizeof(buffer), "%d", (int) timelib_day_of_week(t->y, t->m, t->d)); break;
			case 'N': length = slprintf(buffer, sizeof(buffer), "%d", (int) timelib_iso_day_of_week(t->y, t->m, t->d)); break;
			case 'z': length = slprintf(buffer, sizeof(buffer), "%d", (int) timelib_day_of_year(t->y, t->m, t->d)); break;

			/* week */
			case 'W':
				if(!weekYearSet) { timelib_isoweek_from_date(t->y, t->m, t->d, &isoweek, &isoyear); weekYearSet = 1; }
				length = slprintf(buffer, sizeof(buffer), "%02d", (int) isoweek); break; /* iso weeknr */
			case 'o':
				if(!weekYearSet) { timelib_isoweek_from_date(t->y, t->m, t->d, &isoweek, &isoyear); weekYearSet = 1; }
				length = slprintf(buffer, sizeof(buffer), ZEND_LONG_FMT, (zend_long) isoyear); break; /* iso year */

			/* month */
			case 'F': length = slprintf(buffer, sizeof(buffer), "%s", mon_full_names[t->m - 1]); break;
			case 'm': length = slprintf(buffer, sizeof(buffer), "%02d", (int) t->m); break;
			case 'M': length = slprintf(buffer, sizeof(buffer), "%s", mon_short_names[t->m - 1]); break;
			case 'n': length = slprintf(buffer, sizeof(buffer), "%d", (int) t->m); break;
			case 't': length = slprintf(buffer, sizeof(buffer), "%d", (int) timelib_days_in_month(t->y, t->m)); break;

			/* year */
			case 'L': length = slprintf(buffer, sizeof(buffer), "%d", timelib_is_leap((int) t->y)); break;
			case 'y': length = slprintf(buffer, sizeof(buffer), "%02d", (int) (t->y % 100)); break;
			case 'Y': length = slprintf(buffer, sizeof(buffer), "%s%04lld", t->y < 0 ? "-" : "", php_date_llabs((timelib_sll) t->y)); break;

			/* time */
			case 'a': length = slprintf(buffer, sizeof(buffer), "%s", t->h >= 12 ? "pm" : "am"); break;
			case 'A': length = slprintf(buffer, sizeof(buffer), "%s", t->h >= 12 ? "PM" : "AM"); break;
			case 'B': {
				int retval = ((((long)t->sse)-(((long)t->sse) - ((((long)t->sse) % 86400) + 3600))) * 10);
				if (retval < 0) {
					retval += 864000;
				}
				/* Make sure to do this on a positive int to avoid rounding errors */
				retval = (retval / 864)  % 1000;
				length = slprintf(buffer, sizeof(buffer), "%03d", retval);
				break;
			}
			case 'g': length = slprintf(buffer, sizeof(buffer), "%d", (t->h % 12) ? (int) t->h % 12 : 12); break;
			case 'G': length = slprintf(buffer, sizeof(buffer), "%d", (int) t->h); break;
			case 'h': length = slprintf(buffer, sizeof(buffer), "%02d", (t->h % 12) ? (int) t->h % 12 : 12); break;
			case 'H': length = slprintf(buffer, sizeof(buffer), "%02d", (int) t->h); break;
			case 'i': length = slprintf(buffer, sizeof(buffer), "%02d", (int) t->i); break;
			case 's': length = slprintf(buffer, sizeof(buffer), "%02d", (int) t->s); break;
			case 'u': length = slprintf(buffer, sizeof(buffer), "%06d", (int) floor(t->us)); break;
			case 'v': length = slprintf(buffer, sizeof(buffer), "%03d", (int) floor(t->us / 1000)); break;

			/* timezone */
			case 'I': length = slprintf(buffer, sizeof(buffer), "%d", localtime ? offset->is_dst : 0); break;
			case 'p':
				if (!localtime || strcmp(offset->abbr, "UTC") == 0 || strcmp(offset->abbr, "Z") == 0 || strcmp(offset->abbr, "GMT+0000") == 0) {
					length = slprintf(buffer, sizeof(buffer), "%s", "Z");
					break;
				}
				ZEND_FALLTHROUGH;
			case 'P': rfc_colon = 1; ZEND_FALLTHROUGH;
			case 'O': length = slprintf(buffer, sizeof(buffer), "%c%02d%s%02d",
											localtime ? ((offset->offset < 0) ? '-' : '+') : '+',
											localtime ? abs(offset->offset / 3600) : 0,
											rfc_colon ? ":" : "",
											localtime ? abs((offset->offset % 3600) / 60) : 0
							  );
					  break;
			case 'T': length = slprintf(buffer, sizeof(buffer), "%s", localtime ? offset->abbr : "GMT"); break;
			case 'e': if (!localtime) {
					      length = slprintf(buffer, sizeof(buffer), "%s", "UTC");
					  } else {
						  switch (t->zone_type) {
							  case TIMELIB_ZONETYPE_ID:
								  length = slprintf(buffer, sizeof(buffer), "%s", t->tz_info->name);
								  break;
							  case TIMELIB_ZONETYPE_ABBR:
								  length = slprintf(buffer, sizeof(buffer), "%s", offset->abbr);
								  break;
							  case TIMELIB_ZONETYPE_OFFSET:
								  length = slprintf(buffer, sizeof(buffer), "%c%02d:%02d",
												((offset->offset < 0) ? '-' : '+'),
												abs(offset->offset / 3600),
												abs((offset->offset % 3600) / 60)
										   );
								  break;
						  }
					  }
					  break;
			case 'Z': length = slprintf(buffer, sizeof(buffer), "%d", localtime ? offset->offset : 0); break;

			/* full date/time */
			case 'c': length = slprintf(buffer, sizeof(buffer), "%04" ZEND_LONG_FMT_SPEC "-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
							                (zend_long) t->y, (int) t->m, (int) t->d,
											(int) t->h, (int) t->i, (int) t->s,
											localtime ? ((offset->offset < 0) ? '-' : '+') : '+',
											localtime ? abs(offset->offset / 3600) : 0,
											localtime ? abs((offset->offset % 3600) / 60) : 0
							  );
					  break;
			case 'r': length = slprintf(buffer, sizeof(buffer), "%3s, %02d %3s %04" ZEND_LONG_FMT_SPEC " %02d:%02d:%02d %c%02d%02d",
							                php_date_short_day_name(t->y, t->m, t->d),
											(int) t->d, mon_short_names[t->m - 1],
											(zend_long) t->y, (int) t->h, (int) t->i, (int) t->s,
											localtime ? ((offset->offset < 0) ? '-' : '+') : '+',
											localtime ? abs(offset->offset / 3600) : 0,
											localtime ? abs((offset->offset % 3600) / 60) : 0
							  );
					  break;
			case 'U': length = slprintf(buffer, sizeof(buffer), "%lld", (timelib_sll) t->sse); break;

			case '\\': if (i < format_len) i++; ZEND_FALLTHROUGH;

			default: buffer[0] = format[i]; buffer[1] = '\0'; length = 1; break;
		}
		smart_str_appendl(&string, buffer, length);
	}

	smart_str_0(&string);

	if (localtime) {
		timelib_time_offset_dtor(offset);
	}

	return string.s;
}

static void php_date(INTERNAL_FUNCTION_PARAMETERS, int localtime)
{
	zend_string *format;
	zend_long    ts;
	bool    ts_is_null = 1;

	ZEND_PARSE_PARAMETERS_START(1, 2)
		Z_PARAM_STR(format)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(ts, ts_is_null)
	ZEND_PARSE_PARAMETERS_END();

	if (ts_is_null) {
		ts = php_time();
	}

	RETURN_STR(php_format_date(ZSTR_VAL(format), ZSTR_LEN(format), ts, localtime));
}
/* }}} */

PHPAPI zend_string *php_format_date(const char *format, size_t format_len, time_t ts, int localtime) /* {{{ */
{
	timelib_time   *t;
	timelib_tzinfo *tzi;
	zend_string *string;

	t = timelib_time_ctor();

	if (localtime) {
		tzi = get_timezone_info();
		t->tz_info = tzi;
		t->zone_type = TIMELIB_ZONETYPE_ID;
		timelib_unixtime2local(t, ts);
	} else {
		tzi = NULL;
		timelib_unixtime2gmt(t, ts);
	}

	string = date_format(format, format_len, t, localtime);

	timelib_time_dtor(t);
	return string;
}
/* }}} */

/* {{{ php_idate */
PHPAPI int php_idate(char format, time_t ts, int localtime)
{
	timelib_time   *t;
	timelib_tzinfo *tzi;
	int retval = -1;
	timelib_time_offset *offset = NULL;
	timelib_sll isoweek, isoyear;

	t = timelib_time_ctor();

	if (!localtime) {
		tzi = get_timezone_info();
		t->tz_info = tzi;
		t->zone_type = TIMELIB_ZONETYPE_ID;
		timelib_unixtime2local(t, ts);
	} else {
		tzi = NULL;
		timelib_unixtime2gmt(t, ts);
	}

	if (!localtime) {
		if (t->zone_type == TIMELIB_ZONETYPE_ABBR) {
			offset = timelib_time_offset_ctor();
			offset->offset = (t->z + (t->dst * 3600));
			offset->leap_secs = 0;
			offset->is_dst = t->dst;
			offset->abbr = timelib_strdup(t->tz_abbr);
		} else if (t->zone_type == TIMELIB_ZONETYPE_OFFSET) {
			offset = timelib_time_offset_ctor();
			offset->offset = (t->z + (t->dst * 3600));
			offset->leap_secs = 0;
			offset->is_dst = t->dst;
			offset->abbr = timelib_malloc(9); /* GMT±xxxx\0 */
			snprintf(offset->abbr, 9, "GMT%c%02d%02d",
			                          (offset->offset < 0) ? '-' : '+',
			                          abs(offset->offset / 3600),
			                          abs((offset->offset % 3600) / 60));
		} else {
			offset = timelib_get_time_zone_info(t->sse, t->tz_info);
		}
	}

	timelib_isoweek_from_date(t->y, t->m, t->d, &isoweek, &isoyear);

	switch (format) {
		/* day */
		case 'd': case 'j': retval = (int) t->d; break;

		case 'w': retval = (int) timelib_day_of_week(t->y, t->m, t->d); break;
		case 'z': retval = (int) timelib_day_of_year(t->y, t->m, t->d); break;

		/* week */
		case 'W': retval = (int) isoweek; break; /* iso weeknr */

		/* month */
		case 'm': case 'n': retval = (int) t->m; break;
		case 't': retval = (int) timelib_days_in_month(t->y, t->m); break;

		/* year */
		case 'L': retval = (int) timelib_is_leap((int) t->y); break;
		case 'y': retval = (int) (t->y % 100); break;
		case 'Y': retval = (int) t->y; break;

		/* Swatch Beat a.k.a. Internet Time */
		case 'B':
			retval = ((((long)t->sse)-(((long)t->sse) - ((((long)t->sse) % 86400) + 3600))) * 10);
			if (retval < 0) {
				retval += 864000;
			}
			/* Make sure to do this on a positive int to avoid rounding errors */
			retval = (retval / 864) % 1000;
			break;

		/* time */
		case 'g': case 'h': retval = (int) ((t->h % 12) ? (int) t->h % 12 : 12); break;
		case 'H': case 'G': retval = (int) t->h; break;
		case 'i': retval = (int) t->i; break;
		case 's': retval = (int) t->s; break;

		/* timezone */
		case 'I': retval = (int) (!localtime ? offset->is_dst : 0); break;
		case 'Z': retval = (int) (!localtime ? offset->offset : 0); break;

		case 'U': retval = (int) t->sse; break;
	}

	if (!localtime) {
		timelib_time_offset_dtor(offset);
	}
	timelib_time_dtor(t);

	return retval;
}
/* }}} */

/* {{{ Format a local date/time */
PHP_FUNCTION(date)
{
	php_date(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */

/* {{{ Format a GMT date/time */
PHP_FUNCTION(gmdate)
{
	php_date(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */

/* {{{ Format a local time/date as integer */
PHP_FUNCTION(idate)
{
	zend_string *format;
	zend_long    ts;
	bool    ts_is_null = 1;
	int ret;

	ZEND_PARSE_PARAMETERS_START(1, 2)
		Z_PARAM_STR(format)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(ts, ts_is_null)
	ZEND_PARSE_PARAMETERS_END();

	if (ZSTR_LEN(format) != 1) {
		php_error_docref(NULL, E_WARNING, "idate format is one char");
		RETURN_FALSE;
	}

	if (ts_is_null) {
		ts = php_time();
	}

	ret = php_idate(ZSTR_VAL(format)[0], ts, 0);
	if (ret == -1) {
		php_error_docref(NULL, E_WARNING, "Unrecognized date format token");
		RETURN_FALSE;
	}
	RETURN_LONG(ret);
}
/* }}} */

/* {{{ php_date_set_tzdb - NOT THREADSAFE */
PHPAPI void php_date_set_tzdb(timelib_tzdb *tzdb)
{
	const timelib_tzdb *builtin = timelib_builtin_db();

	if (php_version_compare(tzdb->version, builtin->version) > 0) {
		php_date_global_timezone_db = tzdb;
		php_date_global_timezone_db_enabled = 1;
	}
}
/* }}} */

/* {{{ php_parse_date: Backwards compatibility function */
PHPAPI zend_long php_parse_date(const char *string, zend_long *now)
{
	timelib_time *parsed_time;
	timelib_error_container *error = NULL;
	int           error2;
	zend_long   retval;

	parsed_time = timelib_strtotime(string, strlen(string), &error, DATE_TIMEZONEDB, php_date_parse_tzfile_wrapper);
	if (error->error_count) {
		timelib_time_dtor(parsed_time);