#include "sofam.h" void iauA2af(int ndp, double angle, char *sign, int idmsf[4]) /* ** - - - - - - - - ** i a u A 2 a f ** - - - - - - - - ** ** Decompose radians into degrees, arcminutes, arcseconds, fraction. ** ** This function is part of the International Astronomical Union's ** SOFA (Standards Of Fundamental Astronomy) software collection. ** ** Status: vector/matrix support function. ** ** Given: ** ndp int resolution (Note 1) ** angle double angle in radians ** ** Returned: ** sign char '+' or '-' ** idmsf int[4] degrees, arcminutes, arcseconds, fraction ** ** Called: ** iauD2tf 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. ** ** This revision: 2008 May 27 ** ** Copyright (C) 2008 IAU SOFA Review Board. See notes at end. */ { /* Hours to degrees * radians to turns */ const double F = 15.0 / D2PI; /* Scale then use days to h,m,s function. */ iauD2tf(ndp, angle*F, sign, idmsf); return; /*----------------------------------------------------------------------- ** ** Copyright (C) 2008 ** Standards Of Fundamental Astronomy Review Board ** of the International Astronomical Union. ** ** ===================== ** SOFA Software License ** ===================== ** ** NOTICE TO USER: ** ** BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING TERMS AND CONDITIONS ** WHICH APPLY TO ITS USE. ** ** 1. The Software is owned by the IAU SOFA Review Board ("the Board"). ** ** 2. Permission is granted to anyone to use the SOFA software for any ** purpose, including commercial applications, free of charge and ** without payment of royalties, subject to the conditions and ** restrictions listed below. ** ** 3. You (the user) may copy and adapt the SOFA software and its ** algorithms for your own purposes and you may copy and distribute ** a resulting "derived work" to others on a world-wide, royalty-free ** basis, provided that the derived work complies with the following ** requirements: ** ** a) Your work shall be marked or carry a statement that it (i) uses ** routines and computations derived by you from software provided ** by SOFA under license to you; and (ii) does not contain ** software provided by SOFA or software that has been distributed ** by or endorsed by SOFA. ** ** b) The source code of your derived work must contain descriptions ** of how the derived work is based upon and/or differs from the ** original SOFA software. ** ** c) The name(s) of all routine(s) that you distribute shall differ ** from the SOFA names, even when the SOFA content has not been ** otherwise changed. ** ** d) The routine-naming prefix "iau" shall not be used. ** ** e) The origin of the SOFA components of your derived work must not ** be misrepresented; you must not claim that you wrote the ** original software, nor file a patent application for SOFA ** software or algorithms embedded in the SOFA software. ** ** f) These requirements must be reproduced intact in any source ** distribution and shall apply to anyone to whom you have granted ** a further right to modify the source code of your derived work. ** ** 4. In any published work or commercial products which includes ** results achieved by using the SOFA software, you shall acknowledge ** that the SOFA software was used in obtaining those results. ** ** 5. You shall not cause the SOFA software to be brought into ** disrepute, either by misuse, or use for inappropriate tasks, or by ** inappropriate modification. ** ** 6. The SOFA software is provided "as is" and the Board makes no ** warranty as to its use or performance. The Board does not and ** cannot warrant the performance or results which the user may obtain ** by using the SOFA software. The Board makes no warranties, express ** or implied, as to non-infringement of third party rights, ** merchantability, or fitness for any particular purpose. In no ** event will the Board be liable to the user for any consequential, ** incidental, or special damages, including any lost profits or lost ** savings, even if a Board representative has been advised of such ** damages, or for any claim by any third party. ** ** 7. The provision of any version of the SOFA software under the terms ** and conditions specified herein does not imply that future ** versions will also be made available under the same terms and ** conditions. ** ** Correspondence concerning SOFA software should be addressed as ** follows: ** ** Internet email: sofa@rl.ac.uk ** Postal address: IAU SOFA Center ** Rutherford Appleton Laboratory ** Chilton, Didcot, Oxon OX11 0QX ** United Kingdom ** **---------------------------------------------------------------------*/ }