1c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 2c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 3c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// The LLVM Compiler Infrastructure 4c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 8c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 9c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 10c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// test unsigned long to_ulong() const; 11c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 12c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <bitset> 13c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <algorithm> 149d00ed5d8749f472e63ca7e5a510da2ee58f9dbdHoward Hinnant#include <limits> 15c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <climits> 16c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <cassert> 17c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 18c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnanttemplate <std::size_t N> 19c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantvoid test_to_ulong() 20c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 21c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant const std::size_t M = sizeof(unsigned long) * CHAR_BIT < N ? sizeof(unsigned long) * CHAR_BIT : N; 22c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant const std::size_t X = M == 0 ? sizeof(unsigned long) * CHAR_BIT - 1 : sizeof(unsigned long) * CHAR_BIT - M; 239d00ed5d8749f472e63ca7e5a510da2ee58f9dbdHoward Hinnant const std::size_t max = M == 0 ? 0 : std::size_t(std::numeric_limits<unsigned long>::max()) >> X; 24c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::size_t tests[] = {0, 25c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::min<std::size_t>(1, max), 26c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::min<std::size_t>(2, max), 27c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::min<std::size_t>(3, max), 28c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::min(max, max-3), 29c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::min(max, max-2), 30c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::min(max, max-1), 31c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant max}; 32c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant for (std::size_t i = 0; i < sizeof(tests)/sizeof(tests[0]); ++i) 33c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 34c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::size_t j = tests[i]; 35c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::bitset<N> v(j); 36c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(j == v.to_ulong()); 37c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 38c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 39c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 40c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint main() 41c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 42c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<0>(); 43c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<1>(); 44c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<31>(); 45c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<32>(); 46c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<33>(); 47c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<63>(); 48c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<64>(); 49c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<65>(); 50c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant test_to_ulong<1000>(); 51c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 52