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1 | // 2007-02-04 Edward Smith-Rowland <3dw4rd@verizon.net> |
2 | // | |
cbe34bb5 | 3 | // Copyright (C) 2007-2017 Free Software Foundation, Inc. |
7c62b943 BK |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
7c62b943 BK |
9 | // any later version. |
10 | // | |
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | // | |
16 | // You should have received a copy of the GNU General Public License along | |
748086b7 JJ |
17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
7c62b943 BK |
19 | |
20 | // expint | |
21 | ||
22 | ||
23 | // Compare against values generated by the GNU Scientific Library. | |
24 | // The GSL can be found on the web: http://www.gnu.org/software/gsl/ | |
25 | ||
26 | #include <tr1/cmath> | |
27 | #if defined(__TEST_DEBUG) | |
28 | #include <iostream> | |
29 | #define VERIFY(A) \ | |
30 | if (!(A)) \ | |
31 | { \ | |
32 | std::cout << "line " << __LINE__ \ | |
33 | << " max_abs_frac = " << max_abs_frac \ | |
34 | << std::endl; \ | |
35 | } | |
36 | #else | |
37 | #include <testsuite_hooks.h> | |
38 | #endif | |
39 | #include "../testcase.h" | |
40 | ||
41 | ||
42 | // Test data. | |
43 | testcase_expint<double> data001[] = { | |
44 | { -3.7832640295504591e-24, -50.000000000000000 }, | |
45 | { -1.0489811642368024e-23, -49.000000000000000 }, | |
46 | { -2.9096641904058423e-23, -48.000000000000000 }, | |
47 | { -8.0741978427258127e-23, -47.000000000000000 }, | |
48 | { -2.2415317597442998e-22, -46.000000000000000 }, | |
49 | { -6.2256908094623838e-22, -45.000000000000000 }, | |
50 | { -1.7299598742816476e-21, -44.000000000000000 }, | |
51 | { -4.8094965569500181e-21, -43.000000000000000 }, | |
52 | { -1.3377908810011775e-20, -42.000000000000000 }, | |
53 | { -3.7231667764599780e-20, -41.000000000000000 }, | |
54 | { -1.0367732614516570e-19, -40.000000000000000 }, | |
55 | { -2.8887793015227007e-19, -39.000000000000000 }, | |
56 | { -8.0541069142907499e-19, -38.000000000000000 }, | |
57 | { -2.2470206975885714e-18, -37.000000000000000 }, | |
58 | { -6.2733390097622421e-18, -36.000000000000000 }, | |
59 | { -1.7527059389947371e-17, -35.000000000000000 }, | |
60 | { -4.9006761183927874e-17, -34.000000000000000 }, | |
61 | { -1.3713843484487468e-16, -33.000000000000000 }, | |
62 | { -3.8409618012250666e-16, -32.000000000000000 }, | |
63 | { -1.0767670386162383e-15, -31.000000000000000 }, | |
64 | { -3.0215520106888128e-15, -30.000000000000000 }, | |
65 | { -8.4877597783535618e-15, -29.000000000000000 }, | |
66 | { -2.3869415119337330e-14, -28.000000000000000 }, | |
67 | { -6.7206374352620390e-14, -27.000000000000000 }, | |
68 | { -1.8946858856749785e-13, -26.000000000000000 }, | |
69 | { -5.3488997553402167e-13, -25.000000000000000 }, | |
70 | { -1.5123058939997059e-12, -24.000000000000000 }, | |
71 | { -4.2826847956656722e-12, -23.000000000000000 }, | |
72 | { -1.2149378956204371e-11, -22.000000000000000 }, | |
73 | { -3.4532012671467559e-11, -21.000000000000000 }, | |
74 | { -9.8355252906498815e-11, -20.000000000000000 }, | |
75 | { -2.8078290970607954e-10, -19.000000000000000 }, | |
76 | { -8.0360903448286769e-10, -18.000000000000000 }, | |
77 | { -2.3064319898216547e-09, -17.000000000000000 }, | |
78 | { -6.6404872494410427e-09, -16.000000000000000 }, | |
79 | { -1.9186278921478670e-08, -15.000000000000000 }, | |
80 | { -5.5656311111451816e-08, -14.000000000000000 }, | |
81 | { -1.6218662188014328e-07, -13.000000000000000 }, | |
82 | { -4.7510818246724931e-07, -12.000000000000000 }, | |
83 | { -1.4003003042474418e-06, -11.000000000000000 }, | |
84 | { -4.1569689296853246e-06, -10.000000000000000 }, | |
85 | { -1.2447354178006272e-05, -9.0000000000000000 }, | |
86 | { -3.7665622843924906e-05, -8.0000000000000000 }, | |
87 | { -0.00011548173161033820, -7.0000000000000000 }, | |
88 | { -0.00036008245216265867, -6.0000000000000000 }, | |
89 | { -0.0011482955912753257, -5.0000000000000000 }, | |
90 | { -0.0037793524098489058, -4.0000000000000000 }, | |
91 | { -0.013048381094197037, -3.0000000000000000 }, | |
92 | { -0.048900510708061125, -2.0000000000000000 }, | |
93 | { -0.21938393439552029, -1.0000000000000000 }, | |
94 | }; | |
95 | ||
96 | // Test function. | |
97 | template <typename Tp> | |
98 | void test001() | |
99 | { | |
100 | const Tp eps = std::numeric_limits<Tp>::epsilon(); | |
101 | Tp max_abs_diff = -Tp(1); | |
102 | Tp max_abs_frac = -Tp(1); | |
103 | unsigned int num_datum = sizeof(data001) | |
104 | / sizeof(testcase_expint<double>); | |
105 | for (unsigned int i = 0; i < num_datum; ++i) | |
106 | { | |
107 | const Tp f = std::tr1::expint(Tp(data001[i].x)); | |
108 | const Tp f0 = data001[i].f0; | |
109 | const Tp diff = f - f0; | |
110 | if (std::abs(diff) > max_abs_diff) | |
111 | max_abs_diff = std::abs(diff); | |
112 | if (std::abs(f0) > Tp(10) * eps | |
113 | && std::abs(f) > Tp(10) * eps) | |
114 | { | |
115 | const Tp frac = diff / f0; | |
116 | if (std::abs(frac) > max_abs_frac) | |
117 | max_abs_frac = std::abs(frac); | |
118 | } | |
119 | } | |
120 | VERIFY(max_abs_frac < Tp(2.5000000000000020e-13)); | |
121 | } | |
122 | ||
123 | int main(int, char**) | |
124 | { | |
125 | test001<double>(); | |
126 | return 0; | |
127 | } |