1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // test unsigned long long to_ullong() const; 11 12 #include <bitset> 13 #include <algorithm> 14 #include <climits> 15 #include <cassert> 16 17 template <std::size_t N> 18 void test_to_ullong() 19 { 20 const std::size_t M = sizeof(unsigned long long) * CHAR_BIT < N ? sizeof(unsigned long long) * CHAR_BIT : N; 21 const std::size_t X = M == 0 ? sizeof(unsigned long long) * CHAR_BIT - 1 : sizeof(unsigned long long) * CHAR_BIT - M; 22 const unsigned long long max = M == 0 ? 0 : (unsigned long long)(-1) >> X; 23 unsigned long long tests[] = {0, 24 std::min<unsigned long long>(1, max), 25 std::min<unsigned long long>(2, max), 26 std::min<unsigned long long>(3, max), 27 std::min(max, max-3), 28 std::min(max, max-2), 29 std::min(max, max-1), 30 max}; 31 for (std::size_t i = 0; i < sizeof(tests)/sizeof(tests[0]); ++i) 32 { 33 unsigned long long j = tests[i]; 34 std::bitset<N> v(j); 35 assert(j == v.to_ullong()); 36 } 37 } 38 39 int main() 40 { 41 test_to_ullong<0>(); 42 test_to_ullong<1>(); 43 test_to_ullong<31>(); 44 test_to_ullong<32>(); 45 test_to_ullong<33>(); 46 test_to_ullong<63>(); 47 test_to_ullong<64>(); 48 test_to_ullong<65>(); 49 test_to_ullong<1000>(); 50 } 51
