source: src/Helpers/fast_functions.hpp@ 67c92b

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Last change on this file since 67c92b was 56f73b, checked in by Frederik Heber <heber@…>, 15 years ago

Added config.h also to all header files, code check test ascertain this in the future.

  • as we want to use config.h to pass stuff such as MEMDEBUG, NDEBUG, LOG_OBSERVER, we have to make sure that it is present in each and every file.
  • split up CodeChecks/testsuite.at: each test has its own .at file.
  • Property mode set to 100644
File size: 1.4 KB
RevLine 
[0a4f7f]1/*
2 * fast_functions.hpp
3 *
4 * Created on: Apr 1, 2010
5 * Author: crueger
6 */
7
8#ifndef FAST_FUNCTIONS_HPP_
9#define FAST_FUNCTIONS_HPP_
10
[56f73b]11// include config.h
12#ifdef HAVE_CONFIG_H
13#include <config.h>
14#endif
15
16
[e4fe8d]17#include "Helpers/defs.hpp"
[753f02]18
[0a4f7f]19/**
20 * !@file
21 * This file contains several functions that need to be very fast and which are inlined for this
22 * reason.
23 *
24 * Warning: do not forget inline keyword for functions in this file to avoid multiple definitions!
25 */
26
27/********************************* Functions ************************************************/
28
29/** hard-coded determinant of a 3x3 matrix.
30 * \param a[9] matrix
31 * \return \f$det(a)\f$
32 */
33inline double RDET3(const double a[NDIM*NDIM])
34{
35 return ((a)[0]*(a)[4]*(a)[8] + (a)[3]*(a)[7]*(a)[2] + (a)[6]*(a)[1]*(a)[5] - (a)[2]*(a)[4]*(a)[6] - (a)[5]*(a)[7]*(a)[0] - (a)[8]*(a)[1]*(a)[3]);
36};
37
38/** hard-coded determinant of a 2x2 matrix.
39 * \param a[4] matrix
40 * \return \f$det(a)\f$
41 */
42inline double RDET2(const double a[4])
43{
44 return ((a[0])*(a[3])-(a[1])*(a[2]));
45};
46
47/** hard-coded determinant of a 2x2 matrix.
48 * \param a0 (0,0) entry of matrix
49 * \param a1 (0,1) entry of matrix
50 * \param a2 (1,0) entry of matrix
51 * \param a3 (1,1) entry of matrix
52 * \return \f$det(a)\f$
53 */
54inline double RDET2(const double a0, const double a1, const double a2, const double a3)
55{
56 return ((a0)*(a3)-(a1)*(a2));
57};
58
59
60#endif /* FAST_FUNCTIONS_HPP_ */
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