/* * Copyright (C) 2003-2014 The Music Player Daemon Project * http://www.musicpd.org * * This program 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 2 of the License, or * (at your option) any later version. * * This program 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 program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "util/ConstBuffer.hxx" #include <array> #include <random> #include <stddef.h> #include <stdint.h> template<typename T> struct RandomInt { typedef std::minstd_rand Engine; Engine engine; static_assert(sizeof(T) <= sizeof(Engine::result_type), "RNG result type too small"); T operator()() { return T(random()); } }; struct RandomInt24 : RandomInt<int32_t> { int32_t operator()() { auto t = RandomInt::operator()(); t &= 0xffffff; if (t & 0x800000) t |= 0xff000000; return t; } }; struct RandomFloat { std::mt19937 gen; std::uniform_real_distribution<float> dis; RandomFloat():gen(std::random_device()()), dis(-1.0, 1.0) {} float operator()() { return dis(gen); } }; template<typename T, size_t N> class TestDataBuffer : std::array<T, N> { public: using typename std::array<T, N>::const_pointer; using std::array<T, N>::size; using std::array<T, N>::begin; using std::array<T, N>::end; using std::array<T, N>::operator[]; template<typename G=RandomInt<T>> TestDataBuffer(G g=G()):std::array<T, N>() { for (auto &i : *this) i = g(); } operator typename std::array<T, N>::const_pointer() const { return begin(); } operator ConstBuffer<T>() const { return { begin(), size() }; } operator ConstBuffer<void>() const { return { begin(), size() * sizeof(T) }; } }; template<typename T> bool AssertEqualWithTolerance(const T &a, const T &b, unsigned tolerance) { CPPUNIT_ASSERT_EQUAL(a.size(), b.size()); for (unsigned i = 0; i < a.size(); ++i) { int64_t x = a[i], y = b[i]; CPPUNIT_ASSERT(x >= y - int64_t(tolerance)); CPPUNIT_ASSERT(x <= y + int64_t(tolerance)); } return true; }