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Diffstat (limited to 'ast/erfa/jdcalf.c')
| -rw-r--r-- | ast/erfa/jdcalf.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/ast/erfa/jdcalf.c b/ast/erfa/jdcalf.c deleted file mode 100644 index 85efb68..0000000 --- a/ast/erfa/jdcalf.c +++ /dev/null @@ -1,170 +0,0 @@ -#include "erfa.h" - -int eraJdcalf(int ndp, double dj1, double dj2, int iymdf[4]) -/* -** - - - - - - - - - - -** e r a J d c a l f -** - - - - - - - - - - -** -** Julian Date to Gregorian Calendar, expressed in a form convenient -** for formatting messages: rounded to a specified precision. -** -** Given: -** ndp int number of decimal places of days in fraction -** dj1,dj2 double dj1+dj2 = Julian Date (Note 1) -** -** Returned: -** iymdf int[4] year, month, day, fraction in Gregorian -** calendar -** -** Returned (function value): -** int status: -** -1 = date out of range -** 0 = OK -** +1 = NDP not 0-9 (interpreted as 0) -** -** Notes: -** -** 1) The Julian Date is apportioned in any convenient way between -** the arguments dj1 and dj2. For example, JD=2450123.7 could -** be expressed in any of these ways, among others: -** -** dj1 dj2 -** -** 2450123.7 0.0 (JD method) -** 2451545.0 -1421.3 (J2000 method) -** 2400000.5 50123.2 (MJD method) -** 2450123.5 0.2 (date & time method) -** -** 2) In early eras the conversion is from the "Proleptic Gregorian -** Calendar"; no account is taken of the date(s) of adoption of -** the Gregorian Calendar, nor is the AD/BC numbering convention -** observed. -** -** 3) Refer to the function eraJd2cal. -** -** 4) NDP should be 4 or less if internal overflows are to be -** avoided on machines which use 16-bit integers. -** -** Called: -** eraJd2cal JD to Gregorian calendar -** -** Reference: -** -** Explanatory Supplement to the Astronomical Almanac, -** P. Kenneth Seidelmann (ed), University Science Books (1992), -** Section 12.92 (p604). -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - int j, js; - double denom, d1, d2, f1, f2, f; - - -/* Denominator of fraction (e.g. 100 for 2 decimal places). */ - if ((ndp >= 0) && (ndp <= 9)) { - j = 0; - denom = pow(10.0, ndp); - } else { - j = 1; - denom = 1.0; - } - -/* Copy the date, big then small, and realign to midnight. */ - if (dj1 >= dj2) { - d1 = dj1; - d2 = dj2; - } else { - d1 = dj2; - d2 = dj1; - } - d2 -= 0.5; - -/* Separate days and fractions. */ - f1 = fmod(d1, 1.0); - f2 = fmod(d2, 1.0); - d1 = floor(d1 - f1); - d2 = floor(d2 - f2); - -/* Round the total fraction to the specified number of places. */ - f = floor((f1+f2)*denom + 0.5) / denom; - -/* Re-assemble the rounded date and re-align to noon. */ - d2 += f + 0.5; - -/* Convert to Gregorian calendar. */ - js = eraJd2cal(d1, d2, &iymdf[0], &iymdf[1], &iymdf[2], &f); - if (js == 0) { - iymdf[3] = (int) (f * denom); - } else { - j = js; - } - -/* Return the status. */ - return j; - -} -/*---------------------------------------------------------------------- -** -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** All rights reserved. -** -** This library is derived, with permission, from the International -** Astronomical Union's "Standards of Fundamental Astronomy" library, -** available from http://www.iausofa.org. -** -** The ERFA version is intended to retain identical functionality to -** the SOFA library, but made distinct through different function and -** file names, as set out in the SOFA license conditions. The SOFA -** original has a role as a reference standard for the IAU and IERS, -** and consequently redistribution is permitted only in its unaltered -** state. The ERFA version is not subject to this restriction and -** therefore can be included in distributions which do not support the -** concept of "read only" software. -** -** Although the intent is to replicate the SOFA API (other than -** replacement of prefix names) and results (with the exception of -** bugs; any that are discovered will be fixed), SOFA is not -** responsible for any errors found in this version of the library. -** -** If you wish to acknowledge the SOFA heritage, please acknowledge -** that you are using a library derived from SOFA, rather than SOFA -** itself. -** -** -** TERMS AND CONDITIONS -** -** Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions -** are met: -** -** 1 Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** -** 2 Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** -** 3 Neither the name of the Standards Of Fundamental Astronomy Board, -** the International Astronomical Union nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -** POSSIBILITY OF SUCH DAMAGE. -** -*/ |