| // { dg-options "-std=gnu++0x" } |
| // Use smaller statistics when running on simulators, so it takes less time. |
| // For e.g. cris-elf, mipsisa32r2el-elf, powerpc-eabi and i386-linux-gnu, |
| // this test fails for SAMPLES=30000. |
| // { dg-options "-std=gnu++0x -DSAMPLES=35000" { target simulator } } |
| |
| // Copyright (C) 2010-2014 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| // |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| // |
| // You should have received a copy of the GNU General Public License |
| // along with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| #include "chi2_quality.h" |
| |
| // Tests chi^2 for a set of strings that all consist of '1' and '0'. |
| void |
| test_bit_string_set() |
| { |
| bool test __attribute__((unused)) = true; |
| const unsigned long N = SAMPLES; |
| const unsigned long k = N/100; |
| std::vector<std::string> set; |
| std::string s; |
| for (unsigned long i = 0; i < N; ++i) |
| { |
| s.clear(); |
| for (unsigned int j = 0; j < sizeof(unsigned long) * 8; ++j) |
| { |
| const bool bit = (1UL << j) & i; |
| s.push_back(bit ? '1' : '0'); |
| } |
| set.push_back(s); |
| } |
| |
| double chi2 = chi2_hash(set, k); |
| VERIFY( chi2 < k*1.1 ); |
| } |
| |
| int |
| main() |
| { |
| test_bit_string_set(); |
| return 0; |
| } |