155 lines
3.3 KiB
C++
155 lines
3.3 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <random>
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// template <class UIntType, UIntType a, UIntType c, UIntType m>
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// class linear_congruential_engine;
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// explicit linear_congruential_engine(result_type s = default_seed);
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#include <random>
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#include <sstream>
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#include <cassert>
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template <class T>
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void
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test1()
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{
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// c % m != 0 && s % m != 0
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{
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typedef std::linear_congruential_engine<T, 2, 3, 7> E;
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E e(5);
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std::ostringstream os;
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os << e;
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assert(os.str() == "5");
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}
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{
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typedef std::linear_congruential_engine<T, 2, 3, 0> E;
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E e(5);
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std::ostringstream os;
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os << e;
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assert(os.str() == "5");
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}
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{
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typedef std::linear_congruential_engine<T, 2, 3, 4> E;
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E e(5);
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std::ostringstream os;
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os << e;
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assert(os.str() == "1");
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}
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}
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template <class T>
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void
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test2()
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{
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// c % m != 0 && s % m == 0
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{
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typedef std::linear_congruential_engine<T, 2, 3, 7> E;
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E e(7);
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std::ostringstream os;
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os << e;
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assert(os.str() == "0");
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}
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{
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typedef std::linear_congruential_engine<T, 2, 3, 0> E;
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E e(0);
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std::ostringstream os;
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os << e;
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assert(os.str() == "0");
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}
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{
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typedef std::linear_congruential_engine<T, 2, 3, 4> E;
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E e(4);
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std::ostringstream os;
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os << e;
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assert(os.str() == "0");
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}
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}
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template <class T>
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void
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test3()
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{
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// c % m == 0 && s % m != 0
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{
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typedef std::linear_congruential_engine<T, 2, 0, 7> E;
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E e(3);
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std::ostringstream os;
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os << e;
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assert(os.str() == "3");
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}
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{
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typedef std::linear_congruential_engine<T, 2, 0, 0> E;
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E e(5);
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std::ostringstream os;
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os << e;
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assert(os.str() == "5");
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}
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{
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typedef std::linear_congruential_engine<T, 2, 0, 4> E;
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E e(7);
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std::ostringstream os;
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os << e;
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assert(os.str() == "3");
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}
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}
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template <class T>
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void
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test4()
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{
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// c % m == 0 && s % m == 0
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{
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typedef std::linear_congruential_engine<T, 2, 0, 7> E;
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E e(7);
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std::ostringstream os;
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os << e;
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assert(os.str() == "1");
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}
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{
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typedef std::linear_congruential_engine<T, 2, 0, 0> E;
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E e(0);
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std::ostringstream os;
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os << e;
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assert(os.str() == "1");
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}
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{
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typedef std::linear_congruential_engine<T, 2, 0, 4> E;
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E e(8);
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std::ostringstream os;
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os << e;
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assert(os.str() == "1");
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}
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}
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int main()
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{
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test1<unsigned short>();
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test1<unsigned int>();
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test1<unsigned long>();
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test1<unsigned long long>();
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test2<unsigned short>();
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test2<unsigned int>();
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test2<unsigned long>();
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test2<unsigned long long>();
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test3<unsigned short>();
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test3<unsigned int>();
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test3<unsigned long>();
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test3<unsigned long long>();
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test4<unsigned short>();
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test4<unsigned int>();
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test4<unsigned long>();
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test4<unsigned long long>();
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}
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