File Coverage

erfasrc/src/a2af.c

Criterion	Covered	Total	%
statement	3	3	100.0
branch			n/a
condition			n/a
subroutine			n/a
pod			n/a
total	3	3	100.0

line	stmt	code
1		#include "erfa.h"
2
3	31	void eraA2af(int ndp, double angle, char *sign, int idmsf[4])
4		/*
5		** - - - - - - - -
6		** e r a A 2 a f
7		** - - - - - - - -
8		**
9		** Decompose radians into degrees, arcminutes, arcseconds, fraction.
10		**
11		** Given:
12		** ndp int resolution (Note 1)
13		** angle double angle in radians
14		**
15		** Returned:
16		** sign char* '+' or '-'
17		** idmsf int[4] degrees, arcminutes, arcseconds, fraction
18		**
19		** Notes:
20		**
21		** 1) The argument ndp is interpreted as follows:
22		**
23		** ndp resolution
24		** : ...0000 00 00
25		** -7 1000 00 00
26		** -6 100 00 00
27		** -5 10 00 00
28		** -4 1 00 00
29		** -3 0 10 00
30		** -2 0 01 00
31		** -1 0 00 10
32		** 0 0 00 01
33		** 1 0 00 00.1
34		** 2 0 00 00.01
35		** 3 0 00 00.001
36		** : 0 00 00.000...
37		**
38		** 2) The largest positive useful value for ndp is determined by the
39		** size of angle, the format of doubles on the target platform, and
40		** the risk of overflowing idmsf[3]. On a typical platform, for
41		** angle up to 2pi, the available floating-point precision might
42		** correspond to ndp=12. However, the practical limit is typically
43		** ndp=9, set by the capacity of a 32-bit int, or ndp=4 if int is
44		** only 16 bits.
45		**
46		** 3) The absolute value of angle may exceed 2pi. In cases where it
47		** does not, it is up to the caller to test for and handle the
48		** case where angle is very nearly 2pi and rounds up to 360 degrees,
49		** by testing for idmsf[0]=360 and setting idmsf[0-3] to zero.
50		**
51		** Called:
52		** eraD2tf decompose days to hms
53		**
54		** Copyright (C) 2013-2020, NumFOCUS Foundation.
55		** Derived, with permission, from the SOFA library. See notes at end of file.
56		*/
57		{
58		/* Hours to degrees * radians to turns */
59		const double F = 15.0 / ERFA_D2PI;
60
61
62		/* Scale then use days to h,m,s function. */
63	31	eraD2tf(ndp, angle*F, sign, idmsf);
64
65	31	return;
66
67		}
68		/*----------------------------------------------------------------------
69		**
70		**
71		** Copyright (C) 2013-2020, NumFOCUS Foundation.
72		** All rights reserved.
73		**
74		** This library is derived, with permission, from the International
75		** Astronomical Union's "Standards of Fundamental Astronomy" library,
76		** available from http://www.iausofa.org.
77		**
78		** The ERFA version is intended to retain identical functionality to
79		** the SOFA library, but made distinct through different function and
80		** file names, as set out in the SOFA license conditions. The SOFA
81		** original has a role as a reference standard for the IAU and IERS,
82		** and consequently redistribution is permitted only in its unaltered
83		** state. The ERFA version is not subject to this restriction and
84		** therefore can be included in distributions which do not support the
85		** concept of "read only" software.
86		**
87		** Although the intent is to replicate the SOFA API (other than
88		** replacement of prefix names) and results (with the exception of
89		** bugs; any that are discovered will be fixed), SOFA is not
90		** responsible for any errors found in this version of the library.
91		**
92		** If you wish to acknowledge the SOFA heritage, please acknowledge
93		** that you are using a library derived from SOFA, rather than SOFA
94		** itself.
95		**
96		**
97		** TERMS AND CONDITIONS
98		**
99		** Redistribution and use in source and binary forms, with or without
100		** modification, are permitted provided that the following conditions
101		** are met:
102		**
103		** 1 Redistributions of source code must retain the above copyright
104		** notice, this list of conditions and the following disclaimer.
105		**
106		** 2 Redistributions in binary form must reproduce the above copyright
107		** notice, this list of conditions and the following disclaimer in
108		** the documentation and/or other materials provided with the
109		** distribution.
110		**
111		** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
112		** the International Astronomical Union nor the names of its
113		** contributors may be used to endorse or promote products derived
114		** from this software without specific prior written permission.
115		**
116		** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
117		** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
118		** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
119		** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
120		** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
121		** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
122		** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
123		** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
124		** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
125		** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
126		** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
127		** POSSIBILITY OF SUCH DAMAGE.
128		**
129		*/