1// 2007-02-04 Edward Smith-Rowland <3dw4rd@verizon.net> 2// 3// Copyright (C) 2007-2015 Free Software Foundation, Inc. 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 8// Free Software Foundation; either version 3, or (at your option) 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 17// with this library; see the file COPYING3. If not see 18// <http://www.gnu.org/licenses/>. 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) \ 30if (!(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. 43testcase_expint<double> data001[] = { 44 { 1.8951178163559366, 1.0000000000000000 }, 45 { 4.9542343560018907, 2.0000000000000000 }, 46 { 9.9338325706254160, 3.0000000000000000 }, 47 { 19.630874470056217, 4.0000000000000000 }, 48 { 40.185275355803178, 5.0000000000000000 }, 49 { 85.989762142439204, 6.0000000000000000 }, 50 { 191.50474333550139, 7.0000000000000000 }, 51 { 440.37989953483827, 8.0000000000000000 }, 52 { 1037.8782907170896, 9.0000000000000000 }, 53 { 2492.2289762418782, 10.000000000000000 }, 54 { 6071.4063740986112, 11.000000000000000 }, 55 { 14959.532666397527, 12.000000000000000 }, 56 { 37197.688490689041, 13.000000000000000 }, 57 { 93192.513633965369, 14.000000000000000 }, 58 { 234955.85249076830, 15.000000000000000 }, 59 { 595560.99867083703, 16.000000000000000 }, 60 { 1516637.8940425171, 17.000000000000000 }, 61 { 3877904.3305974435, 18.000000000000000 }, 62 { 9950907.2510468438, 19.000000000000000 }, 63 { 25615652.664056588, 20.000000000000000 }, 64 { 66127186.355484918, 21.000000000000000 }, 65 { 171144671.30036369, 22.000000000000000 }, 66 { 443966369.83027118, 23.000000000000000 }, 67 { 1154115391.8491828, 24.000000000000000 }, 68 { 3005950906.5255489, 25.000000000000000 }, 69 { 7842940991.8981876, 26.000000000000000 }, 70 { 20496497119.880810, 27.000000000000000 }, 71 { 53645118592.314682, 28.000000000000000 }, 72 { 140599195758.40689, 29.000000000000000 }, 73 { 368973209407.27423, 30.000000000000000 }, 74 { 969455575968.39392, 31.000000000000000 }, 75 { 2550043566357.7866, 32.000000000000000 }, 76 { 6714640184076.4980, 33.000000000000000 }, 77 { 17698037244116.266, 34.000000000000000 }, 78 { 46690550144661.594, 35.000000000000000 }, 79 { 123285207991209.75, 36.000000000000000 }, 80 { 325798899867226.44, 37.000000000000000 }, 81 { 861638819996578.62, 38.000000000000000 }, 82 { 2280446200301902.5, 39.000000000000000 }, 83 { 6039718263611242.0, 40.000000000000000 }, 84 { 16006649143245042., 41.000000000000000 }, 85 { 42447960921368504., 42.000000000000000 }, 86 { 1.1263482901669667e+17, 43.000000000000000 }, 87 { 2.9904447186323366e+17, 44.000000000000000 }, 88 { 7.9439160357044531e+17, 45.000000000000000 }, 89 { 2.1113423886478239e+18, 46.000000000000000 }, 90 { 5.6143296808103434e+18, 47.000000000000000 }, 91 { 1.4936302131129930e+19, 48.000000000000000 }, 92 { 3.9754427479037444e+19, 49.000000000000000 }, 93 { 1.0585636897131690e+20, 50.000000000000000 }, 94}; 95 96// Test function. 97template <typename Tp> 98void 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 123int main(int, char**) 124{ 125 test001<double>(); 126 return 0; 127} 128