File Coverage

erfasrc/src/c2s.c
Criterion Covered Total %
statement 8 8 100.0
branch 2 4 50.0
condition n/a
subroutine n/a
pod n/a
total 10 12 83.3


line stmt bran cond sub pod time code
1             #include "erfa.h"
2              
3 393           void eraC2s(double p[3], double *theta, double *phi)
4             /*
5             ** - - - - - - -
6             ** e r a C 2 s
7             ** - - - - - - -
8             **
9             ** P-vector to spherical coordinates.
10             **
11             ** Given:
12             ** p double[3] p-vector
13             **
14             ** Returned:
15             ** theta double longitude angle (radians)
16             ** phi double latitude angle (radians)
17             **
18             ** Notes:
19             **
20             ** 1) The vector p can have any magnitude; only its direction is used.
21             **
22             ** 2) If p is null, zero theta and phi are returned.
23             **
24             ** 3) At either pole, zero theta is returned.
25             **
26             ** Copyright (C) 2013-2020, NumFOCUS Foundation.
27             ** Derived, with permission, from the SOFA library. See notes at end of file.
28             */
29             {
30             double x, y, z, d2;
31              
32              
33 393           x = p[0];
34 393           y = p[1];
35 393           z = p[2];
36 393           d2 = x*x + y*y;
37              
38 393 50         *theta = (d2 == 0.0) ? 0.0 : atan2(y, x);
39 393 50         *phi = (z == 0.0) ? 0.0 : atan2(z, sqrt(d2));
40              
41 393           return;
42              
43             }
44             /*----------------------------------------------------------------------
45             **
46             **
47             ** Copyright (C) 2013-2020, NumFOCUS Foundation.
48             ** All rights reserved.
49             **
50             ** This library is derived, with permission, from the International
51             ** Astronomical Union's "Standards of Fundamental Astronomy" library,
52             ** available from http://www.iausofa.org.
53             **
54             ** The ERFA version is intended to retain identical functionality to
55             ** the SOFA library, but made distinct through different function and
56             ** file names, as set out in the SOFA license conditions. The SOFA
57             ** original has a role as a reference standard for the IAU and IERS,
58             ** and consequently redistribution is permitted only in its unaltered
59             ** state. The ERFA version is not subject to this restriction and
60             ** therefore can be included in distributions which do not support the
61             ** concept of "read only" software.
62             **
63             ** Although the intent is to replicate the SOFA API (other than
64             ** replacement of prefix names) and results (with the exception of
65             ** bugs; any that are discovered will be fixed), SOFA is not
66             ** responsible for any errors found in this version of the library.
67             **
68             ** If you wish to acknowledge the SOFA heritage, please acknowledge
69             ** that you are using a library derived from SOFA, rather than SOFA
70             ** itself.
71             **
72             **
73             ** TERMS AND CONDITIONS
74             **
75             ** Redistribution and use in source and binary forms, with or without
76             ** modification, are permitted provided that the following conditions
77             ** are met:
78             **
79             ** 1 Redistributions of source code must retain the above copyright
80             ** notice, this list of conditions and the following disclaimer.
81             **
82             ** 2 Redistributions in binary form must reproduce the above copyright
83             ** notice, this list of conditions and the following disclaimer in
84             ** the documentation and/or other materials provided with the
85             ** distribution.
86             **
87             ** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
88             ** the International Astronomical Union nor the names of its
89             ** contributors may be used to endorse or promote products derived
90             ** from this software without specific prior written permission.
91             **
92             ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
93             ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
94             ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
95             ** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
96             ** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
97             ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
98             ** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99             ** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
100             ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
101             ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
102             ** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
103             ** POSSIBILITY OF SUCH DAMAGE.
104             **
105             */