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authorWilliam Joye <wjoye@cfa.harvard.edu>2017-12-08 18:57:06 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2017-12-08 18:57:06 (GMT)
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-#include "erfa.h"
-
-void eraA2af(int ndp, double angle, char *sign, int idmsf[4])
-/*
-** - - - - - - - -
-** e r a A 2 a f
-** - - - - - - - -
-**
-** Decompose radians into degrees, arcminutes, arcseconds, fraction.
-**
-** Given:
-** ndp int resolution (Note 1)
-** angle double angle in radians
-**
-** Returned:
-** sign char '+' or '-'
-** idmsf int[4] degrees, arcminutes, arcseconds, fraction
-**
-** Called:
-** eraD2tf decompose days to hms
-**
-** Notes:
-**
-** 1) The argument ndp is interpreted as follows:
-**
-** ndp resolution
-** : ...0000 00 00
-** -7 1000 00 00
-** -6 100 00 00
-** -5 10 00 00
-** -4 1 00 00
-** -3 0 10 00
-** -2 0 01 00
-** -1 0 00 10
-** 0 0 00 01
-** 1 0 00 00.1
-** 2 0 00 00.01
-** 3 0 00 00.001
-** : 0 00 00.000...
-**
-** 2) The largest positive useful value for ndp is determined by the
-** size of angle, the format of doubles on the target platform, and
-** the risk of overflowing idmsf[3]. On a typical platform, for
-** angle up to 2pi, the available floating-point precision might
-** correspond to ndp=12. However, the practical limit is typically
-** ndp=9, set by the capacity of a 32-bit int, or ndp=4 if int is
-** only 16 bits.
-**
-** 3) The absolute value of angle may exceed 2pi. In cases where it
-** does not, it is up to the caller to test for and handle the
-** case where angle is very nearly 2pi and rounds up to 360 degrees,
-** by testing for idmsf[0]=360 and setting idmsf[0-3] to zero.
-**
-** Copyright (C) 2013-2016, NumFOCUS Foundation.
-** Derived, with permission, from the SOFA library. See notes at end of file.
-*/
-{
-/* Hours to degrees * radians to turns */
- const double F = 15.0 / ERFA_D2PI;
-
-
-/* Scale then use days to h,m,s function. */
- eraD2tf(ndp, angle*F, sign, idmsf);
-
- return;
-
-}
-/*----------------------------------------------------------------------
-**
-**
-** 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.
-**
-*/