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Diffstat (limited to 'ast/erfa/af2a.c')
| -rw-r--r-- | ast/erfa/af2a.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/ast/erfa/af2a.c b/ast/erfa/af2a.c new file mode 100644 index 0000000..b74dd75 --- /dev/null +++ b/ast/erfa/af2a.c @@ -0,0 +1,116 @@ +#include "erfa.h" +#include <stdlib.h> + +int eraAf2a(char s, int ideg, int iamin, double asec, double *rad) +/* +** - - - - - - - - +** e r a A f 2 a +** - - - - - - - - +** +** Convert degrees, arcminutes, arcseconds to radians. +** +** Given: +** s char sign: '-' = negative, otherwise positive +** ideg int degrees +** iamin int arcminutes +** asec double arcseconds +** +** Returned: +** rad double angle in radians +** +** Returned (function value): +** int status: 0 = OK +** 1 = ideg outside range 0-359 +** 2 = iamin outside range 0-59 +** 3 = asec outside range 0-59.999... +** +** Notes: +** +** 1) The result is computed even if any of the range checks fail. +** +** 2) Negative ideg, iamin and/or asec produce a warning status, but +** the absolute value is used in the conversion. +** +** 3) If there are multiple errors, the status value reflects only the +** first, the smallest taking precedence. +** +** Copyright (C) 2013-2016, NumFOCUS Foundation. +** Derived, with permission, from the SOFA library. See notes at end of file. +*/ +{ + +/* Compute the interval. */ + *rad = ( s == '-' ? -1.0 : 1.0 ) * + ( 60.0 * ( 60.0 * ( (double) abs(ideg) ) + + ( (double) abs(iamin) ) ) + + fabs(asec) ) * ERFA_DAS2R; + +/* Validate arguments and return status. */ + if ( ideg < 0 || ideg > 359 ) return 1; + if ( iamin < 0 || iamin > 59 ) return 2; + if ( asec < 0.0 || asec >= 60.0 ) return 3; + return 0; + +} +/*---------------------------------------------------------------------- +** +** +** 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. +** +*/ |