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Diffstat (limited to 'ext/standard/sunfuncs.c')
-rw-r--r-- | ext/standard/sunfuncs.c | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/ext/standard/sunfuncs.c b/ext/standard/sunfuncs.c deleted file mode 100644 index 58bab3258e..0000000000 --- a/ext/standard/sunfuncs.c +++ /dev/null @@ -1,242 +0,0 @@ -/* - +----------------------------------------------------------------------+ - | PHP Version 4 | - +----------------------------------------------------------------------+ - | Copyright (c) 1997-2003 The PHP Group | - +----------------------------------------------------------------------+ - | This source file is subject to version 2.02 of the PHP license, | - | that is bundled with this package in the file LICENSE, and is | - | available at through the world-wide-web at | - | http://www.php.net/license/2_02.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. | - +----------------------------------------------------------------------+ - | Author: Moshe Doron <mosdoron@netvision.net.il> | - +----------------------------------------------------------------------+ -*/ - -/* $Id$ */ - -/* - The sun position algorithm taken from the 'US Naval Observatory's - Almanac for Computers', implemented by Ken Bloom <kekabloom@ucdavis.edu> - for the zmanim project <http://sourceforge.net/projects/zmanim/> - and finally converted to C by Moshe Doron <mosdoron@netvision.net.il>. -*/ - -#include "php.h" -#include "php_sunfuncs.h" -#include "datetime.h" -#include "php_ini.h" - -#include <assert.h> -#include <math.h> -#include <stdlib.h> - -/* {{{ macros and constants - */ -#ifndef M_PI -#define M_PI 3.14159265358979323846 -#endif - -#define to_rad(degrees) (degrees * M_PI / 180) -#define to_rad_with_min(degrees) (degrees + minutes / 60) -#define to_deg(rad) (rad * 180 / M_PI) -/* }}} */ - -/* {{{ php_sunrise_sunset - returns time in UTC */ -static double php_sunrise_sunset(long N, double latitude, double longitude, double zenith, int calc_sunset) -{ - double lngHour, t, M, L, Lx, RA, RAx, Lquadrant, RAquadrant, sinDec, cosDec, cosH, H, T, UT, UTx; - - /* step 1: First calculate the day of the year - int N = theday - date(1, 1, theday.year()) + 1; - */ - - /* step 2: convert the longitude to hour value and calculate an approximate time */ - lngHour = longitude / 15; - - /* use 18 for sunset instead of 6 */ - if (calc_sunset) { - t = (double) N + ((18 - lngHour) / 24); /* Sunset */ - } else { - t = (double) N + ((6 - lngHour) / 24); /* Sunrise */ - } - - /* step 3: calculate the sun's mean anomaly */ - M = (0.9856 * t) - 3.289; - - /* step 4: calculate the sun's true longitude */ - L = M + (1.916 * sin(to_rad(M))) + (0.020 * sin (to_rad(2 * M))) + 282.634; - - while (L < 0) { - Lx = L + 360; - assert (Lx != L); /* askingtheguru: realy needed? */ - L = Lx; - } - - while (L >= 360) { - Lx = L - 360; - assert (Lx != L); /* askingtheguru: realy needed? */ - L = Lx; - } - - /* step 5a: calculate the sun's right ascension */ - RA = to_deg(atan(0.91764 * tan(to_rad(L)))); - - while (RA < 0) { - RAx = RA + 360; - assert (RAx != RA); /* askingtheguru: realy needed? */ - RA = RAx; - } - - while (RA >= 360) { - RAx = RA - 360; - assert (RAx != RA); /* askingtheguru: realy needed? */ - RA = RAx; - } - - /* step 5b: right ascension value needs to be in the same quadrant as L */ - Lquadrant = floor(L / 90) * 90; - RAquadrant = floor(RA / 90) * 90; - RA = RA + (Lquadrant - RAquadrant); - - /* step 5c: right ascension value needs to be converted into hours */ - RA /= 15; - - /* step 6: calculate the sun's declination */ - sinDec = 0.39782 * sin(to_rad(L)); - cosDec = cos(asin(sinDec)); - - /* step 7a: calculate the sun's local hour angle */ - cosH = (cos(to_rad(zenith)) - (sinDec * sin(to_rad(latitude)))) / (cosDec * cos(to_rad(latitude))); - - /* XXX: What's the use of this block.. ? - * if (!calc_sunset && cosH > 1 || calc_sunset && cosH < -1) { - * throw doesnthappen(); - * } - */ - - /* step 7b: finish calculating H and convert into hours */ - if (calc_sunset) { - H = to_deg(acos(cosH)); /* Sunset */ - } else { - H = 360 - to_deg(acos(cosH)); /* Sunrise */ - } - H = H / 15; - - /* step 8: calculate local mean time */ - T = H + RA - (0.06571 * t) - 6.622; - - /* step 9: convert to UTC */ - UT = T - lngHour; - - while (UT < 0) { - UTx = UT + 24; - assert (UTx != UT); /* askingtheguru: realy needed? */ - UT = UTx; - } - - while (UT >= 24) { - UTx = UT - 24; - assert (UTx != UT); /* askingtheguru: realy needed? */ - UT = UTx; - } - - return UT; -} -/* }}} */ - -/* {{{ php_do_date_sunrise_sunset - * Common for date_sunrise() and date_sunset() functions - */ -static void php_do_date_sunrise_sunset(INTERNAL_FUNCTION_PARAMETERS, int calc_sunset) -{ - zval *date; - double latitude, longitude, zenith, gmt_offset, ret; - int time, N, retformat; - char retstr[6]; - - if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z|ldddd", &date, &retformat, &latitude, &longitude, &zenith, &gmt_offset) == FAILURE) { - RETURN_FALSE; - } - - switch (Z_TYPE_P(date)) { - case IS_LONG: - time = Z_LVAL_P(date); - break; - case IS_STRING: - /* todo: more user friendly format */ - default: - php_error_docref(NULL TSRMLS_CC, E_WARNING, "date must be timestamp for now"); - RETURN_FALSE; - } - - N = php_idate('z', time, 0) + 1; - - switch (ZEND_NUM_ARGS()) { - case 1: - retformat = SUNFUNCS_RET_STRING; - case 2: - latitude = INI_FLT("date.default_latitude"); - case 3: - longitude = INI_FLT("date.default_longitude"); - case 4: - if (calc_sunset) { - zenith = INI_FLT("date.sunset_zenith"); - } else { - zenith = INI_FLT("date.sunrise_zenith"); - } - case 5: - gmt_offset = php_idate('Z', time, 0) / 3600; - default: - break; - } - - ret = php_sunrise_sunset(N, latitude, longitude, zenith, calc_sunset) + gmt_offset; - - switch (retformat) { - case SUNFUNCS_RET_TIMESTAMP: - RETURN_LONG((int) (time - (time % (24 * 3600))) + (int) (60 * ret)); - break; - case SUNFUNCS_RET_STRING: - N = (int) ret; - sprintf(retstr, "%02d:%02d", N, (int) (60 * (ret - (double) N))); - RETVAL_STRINGL(retstr, 5, 1); - break; - case SUNFUNCS_RET_DOUBLE: - RETURN_DOUBLE(ret); - break; - default: - php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid format"); - RETURN_FALSE; - } -} -/* }}} */ - -/* {{{ proto mixed date_sunrise(mixed time [, int format [, float latitude [, float longitude [, float zenith [, float gmt_offset]]]]]) - Returns time of sunrise for a given day & location */ -PHP_FUNCTION(date_sunrise) -{ - php_do_date_sunrise_sunset(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0); -} -/* }}} */ - -/* {{{ proto mixed date_sunset(mixed time [, int format [, float latitude [, float longitude [, float zenith [, float gmt_offset]]]]]) - Returns time of sunset for a given day & location */ -PHP_FUNCTION(date_sunset) -{ - php_do_date_sunrise_sunset(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1); -} -/* }}} */ - -/* - * Local variables: - * tab-width: 4 - * c-basic-offset: 4 - * End: - * vim600: sw=4 ts=4 fdm=marker - * vim<600: sw=4 ts=4 - */ |