File Coverage

erfasrc/src/epj.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 bran cond sub pod time code
1             #include "erfa.h"
2              
3 197           double eraEpj(double dj1, double dj2)
4             /*
5             ** - - - - - - -
6             ** e r a E p j
7             ** - - - - - - -
8             **
9             ** Julian Date to Julian Epoch.
10             **
11             ** Given:
12             ** dj1,dj2 double Julian Date (see note)
13             **
14             ** Returned (function value):
15             ** double Julian Epoch
16             **
17             ** Note:
18             **
19             ** The Julian Date is supplied in two pieces, in the usual ERFA
20             ** manner, which is designed to preserve time resolution. The
21             ** Julian Date is available as a single number by adding dj1 and
22             ** dj2. The maximum resolution is achieved if dj1 is 2451545.0
23             ** (J2000.0).
24             **
25             ** Reference:
26             **
27             ** Lieske, J.H., 1979, Astron.Astrophys. 73, 282.
28             **
29             ** Copyright (C) 2013-2020, NumFOCUS Foundation.
30             ** Derived, with permission, from the SOFA library. See notes at end of file.
31             */
32             {
33             double epj;
34              
35              
36 197           epj = 2000.0 + ((dj1 - ERFA_DJ00) + dj2) / ERFA_DJY;
37              
38 197           return epj;
39              
40             }
41             /*----------------------------------------------------------------------
42             **
43             **
44             ** Copyright (C) 2013-2020, NumFOCUS Foundation.
45             ** All rights reserved.
46             **
47             ** This library is derived, with permission, from the International
48             ** Astronomical Union's "Standards of Fundamental Astronomy" library,
49             ** available from http://www.iausofa.org.
50             **
51             ** The ERFA version is intended to retain identical functionality to
52             ** the SOFA library, but made distinct through different function and
53             ** file names, as set out in the SOFA license conditions. The SOFA
54             ** original has a role as a reference standard for the IAU and IERS,
55             ** and consequently redistribution is permitted only in its unaltered
56             ** state. The ERFA version is not subject to this restriction and
57             ** therefore can be included in distributions which do not support the
58             ** concept of "read only" software.
59             **
60             ** Although the intent is to replicate the SOFA API (other than
61             ** replacement of prefix names) and results (with the exception of
62             ** bugs; any that are discovered will be fixed), SOFA is not
63             ** responsible for any errors found in this version of the library.
64             **
65             ** If you wish to acknowledge the SOFA heritage, please acknowledge
66             ** that you are using a library derived from SOFA, rather than SOFA
67             ** itself.
68             **
69             **
70             ** TERMS AND CONDITIONS
71             **
72             ** Redistribution and use in source and binary forms, with or without
73             ** modification, are permitted provided that the following conditions
74             ** are met:
75             **
76             ** 1 Redistributions of source code must retain the above copyright
77             ** notice, this list of conditions and the following disclaimer.
78             **
79             ** 2 Redistributions in binary form must reproduce the above copyright
80             ** notice, this list of conditions and the following disclaimer in
81             ** the documentation and/or other materials provided with the
82             ** distribution.
83             **
84             ** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
85             ** the International Astronomical Union nor the names of its
86             ** contributors may be used to endorse or promote products derived
87             ** from this software without specific prior written permission.
88             **
89             ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
90             ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
91             ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
92             ** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
93             ** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
94             ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
95             ** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
96             ** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
97             ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
98             ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
99             ** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
100             ** POSSIBILITY OF SUCH DAMAGE.
101             **
102             */