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php-src/ext/standard/datetime.c

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2004 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 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: |
| http://www.php.net/license/3_0.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: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
| Rasmus Lerdorf <rasmus@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#if HAVE_STRPTIME
#define _XOPEN_SOURCE
#endif
#include "php.h"
#include "zend_operators.h"
#include "datetime.h"
#include "php_globals.h"
#include <time.h>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include <stdio.h>
char *mon_full_names[] = {
"January", "February", "March", "April",
"May", "June", "July", "August",
"September", "October", "November", "December"
};
char *mon_short_names[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
char *day_full_names[] = {
"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
};
char *day_short_names[] = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};
#if !defined(HAVE_TM_ZONE) && !defined(_TIMEZONE) && !defined(HAVE_DECLARED_TIMEZONE)
#ifdef NETWARE
#define timezone _timezone /* timezone is called '_timezone' in new version of LibC */
#endif
extern time_t timezone;
extern int daylight;
#endif
static int phpday_tab[2][12] = {
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
#define isleap(year) ((((year) % 4) == 0 && ((year) % 100) != 0) || ((year) % 400)==0)
#define YEAR_BASE 1900
/* {{{ php_idate
*/
PHPAPI int php_idate(char format, int timestamp, int gm)
{
time_t the_time;
struct tm *ta, tmbuf;
int h, beat, fd, wd, yd, wk;
#if !HAVE_TM_GMTOFF
long tzone;
char *tname[2]= {"GMT Standard Time", "BST"};
#endif
the_time = timestamp;
if (gm) {
ta = php_gmtime_r(&the_time, &tmbuf);
#if !HAVE_TM_GMTOFF
tzone = 0;
#endif
} else {
ta = php_localtime_r(&the_time, &tmbuf);
#if !HAVE_TM_GMTOFF
#ifdef __CYGWIN__
tzone = _timezone;
#else
tzone = timezone;
#endif
tname[0] = tzname[0];
#endif
}
switch (format) {
case 'U': /* seconds since the epoch */
return (long)the_time;
case 'Y': /* year, numeric, 4 digits */
return ta->tm_year + YEAR_BASE;
case 'z': /* day (of the year) */
return ta->tm_yday;
case 'y': /* year, numeric, 2 digits */
return (ta->tm_year) % 100;
case 'm': /* month, numeric */
case 'n':
return ta->tm_mon + 1;
case 'd': /* day of the month, numeric */
case 'j':
return ta->tm_mday;
case 'H': /* hour, numeric, 24 hour format */
case 'G':
return ta->tm_hour;
case 'h': /* hour, numeric, 12 hour format */
case 'g':
h = ta->tm_hour % 12;
if (h == 0) {
h = 12;
}
return h;
case 'i': /* minutes, numeric */
return ta->tm_min;
case 's': /* seconds, numeric */
return ta->tm_sec;
case 't': /* days in current month */
return phpday_tab[isleap((ta->tm_year + YEAR_BASE))][ta->tm_mon];
case 'w': /* day of the week, numeric EXTENSION */
return ta->tm_wday;
case 'Z': /* timezone offset in seconds */
#if HAVE_TM_GMTOFF
return ta->tm_gmtoff;
#else
return ta->tm_isdst ? -(tzone - 3600) : -tzone;
#endif
case 'L': /* boolean for leapyear */
return isleap(ta->tm_year + YEAR_BASE) ? 1 : 0;
case 'B': /* Swatch Beat a.k.a. Internet Time */
beat = (((((long)the_time) - (((long)the_time) - ((((long)the_time) % 86400) + 3600))) * 10) / 864);
while (beat < 0) {
beat += 1000;
}
beat = beat % 1000;
return beat;
case 'I':
return ta->tm_isdst;
case 'W': /* ISO-8601 week number of year, weeks starting on Monday */
wd = (ta->tm_wday == 0) ? 6 : ta->tm_wday - 1; /* weekday */
yd = ta->tm_yday + 1; /* days since January 1st */
fd = (7 + wd - yd % 7+ 1) % 7; /* weekday (1st January) */
if ((yd <= 7 - fd) && fd > 3) { /* week is a last year week (52 or 53) */
wk = (fd == 4 || (fd == 5 && isleap((ta->tm_year + YEAR_BASE - 1)))) ? 53 : 52;
}
/* week is a next year week (1) */
else if (isleap((ta->tm_year + YEAR_BASE)) + 365 - yd < 3 - wd) {
wk = 1;
}
/* normal week */
else {
wk = (yd + 6 - wd + fd) / 7 - (fd > 3);
}
return wk;
break;
default:
return 0;
}
}
/* }}} */
/* {{{ proto int idate(string format [, int timestamp])
Format a local time/date as integer */
PHP_FUNCTION(idate)
{
zval **format, **timestamp;
int t, ret;
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &format) == FAILURE) {
WRONG_PARAM_COUNT;
}
t = time(NULL);
break;
case 2:
if (zend_get_parameters_ex(2, &format, &timestamp) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(timestamp);
t = Z_LVAL_PP(timestamp);
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string_ex(format);
if (Z_STRLEN_PP(format) != 1) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "idate format is one char");
RETURN_FALSE;
}
ret = php_idate(Z_STRVAL_PP(format)[0], t, 0);
RETURN_LONG(ret);
}
/* }}} */
/* {{{ php_std_date
Return date string in standard format for http headers */
PHPAPI char *php_std_date(time_t t TSRMLS_DC)
{
struct tm *tm1, tmbuf;
char *str;
tm1 = php_gmtime_r(&t, &tmbuf);
str = emalloc(81);
if (PG(y2k_compliance)) {
snprintf(str, 80, "%s, %02d %s %04d %02d:%02d:%02d GMT",
day_short_names[tm1->tm_wday],
tm1->tm_mday,
mon_short_names[tm1->tm_mon],
tm1->tm_year + 1900,
tm1->tm_hour, tm1->tm_min, tm1->tm_sec);
} else {
snprintf(str, 80, "%s, %02d-%s-%02d %02d:%02d:%02d GMT",
day_full_names[tm1->tm_wday],
tm1->tm_mday,
mon_short_names[tm1->tm_mon],
((tm1->tm_year) % 100),
tm1->tm_hour, tm1->tm_min, tm1->tm_sec);
}
str[79] = 0;
return (str);
}
/* }}} */
#if HAVE_STRPTIME
/* {{{ proto string strptime(string timestamp, string format)
Parse a time/date generated with strftime() */
PHP_FUNCTION(strptime)
{
char *ts;
int ts_length;
char *format;
int format_length;
struct tm parsed_time;
char *unparsed_part;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss",
&ts, &ts_length, &format, &format_length) == FAILURE) {
return;
}
unparsed_part = strptime(ts, format, &parsed_time);
if (unparsed_part == NULL) {
RETURN_FALSE;
}
array_init(return_value);
add_assoc_long(return_value, "tm_sec", parsed_time.tm_sec);
add_assoc_long(return_value, "tm_min", parsed_time.tm_min);
add_assoc_long(return_value, "tm_hour", parsed_time.tm_hour);
add_assoc_long(return_value, "tm_mday", parsed_time.tm_mday);
add_assoc_long(return_value, "tm_mon", parsed_time.tm_mon);
add_assoc_long(return_value, "tm_year", parsed_time.tm_year);
add_assoc_long(return_value, "tm_wday", parsed_time.tm_wday);
add_assoc_long(return_value, "tm_yday", parsed_time.tm_yday);
add_assoc_string(return_value, "unparsed", unparsed_part, 1);
}
/* }}} */
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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