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author | Joel Rosdahl <joel@rosdahl.net> | 2023-03-05 12:17:31 +0100 |
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committer | Joel Rosdahl <joel@rosdahl.net> | 2023-03-05 21:42:12 +0100 |
commit | aff0f0f4ce70394d8aa3e3ce0b6521e41a4befcc (patch) | |
tree | 7afc07b2de0fe1c31c3f1fc420539a260323132f | |
parent | f7630ae3001a5d97c7ee5f65776caed44b38b863 (diff) | |
download | ccache-aff0f0f4ce70394d8aa3e3ce0b6521e41a4befcc.tar.gz |
enhance: Add util::BitSet
-rw-r--r-- | src/util/BitSet.hpp | 121 | ||||
-rw-r--r-- | unittest/CMakeLists.txt | 1 | ||||
-rw-r--r-- | unittest/test_util_BitSet.cpp | 76 |
3 files changed, 198 insertions, 0 deletions
diff --git a/src/util/BitSet.hpp b/src/util/BitSet.hpp new file mode 100644 index 00000000..9cf146dc --- /dev/null +++ b/src/util/BitSet.hpp @@ -0,0 +1,121 @@ +// Copyright (C) 2023 Joel Rosdahl and other contributors +// +// See doc/AUTHORS.adoc for a complete list of contributors. +// +// 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 3 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 + +#pragma once + +#include <type_traits> + +namespace util { + +template<typename T> class BitSet +{ +public: + explicit BitSet(T value = {}); + BitSet(const BitSet& set); + + BitSet& operator=(const BitSet& set); + + bool contains(T value) const; + bool empty() const; + + void clear(); + void insert(T value); + void insert(const BitSet& set); + void erase(T value); + + template<typename U> static BitSet<T> from_bitmask(U mask); + typename std::underlying_type<T>::type to_bitmask() const; + +private: + typename std::underlying_type<T>::type m_value; +}; + +// --- Inline implementations --- + +template<typename T> +inline BitSet<T>::BitSet(T value) + : m_value(static_cast<typename std::underlying_type<T>::type>(value)) +{ +} + +template<typename T> +inline BitSet<T>::BitSet(const BitSet& set) : m_value(set.m_value) +{ +} + +template<typename T> +inline BitSet<T>& +BitSet<T>::operator=(const BitSet& set) +{ + m_value = set.m_value; + return *this; +} + +template<typename T> +inline bool +BitSet<T>::contains(T value) const +{ + return m_value & static_cast<typename std::underlying_type<T>::type>(value); +} + +template<typename T> +inline bool +BitSet<T>::empty() const +{ + return to_bitmask() == 0; +} + +template<typename T> +inline void +BitSet<T>::insert(T value) +{ + m_value |= static_cast<typename std::underlying_type<T>::type>(value); +} + +template<typename T> +inline void +BitSet<T>::insert(const BitSet& set) +{ + m_value |= static_cast<typename std::underlying_type<T>::type>(set.m_value); +} + +template<typename T> +inline void +BitSet<T>::erase(T value) +{ + m_value &= ~static_cast<typename std::underlying_type<T>::type>(value); +} + +template<typename T> +template<typename U> +inline BitSet<T> +BitSet<T>::from_bitmask(U mask) +{ + BitSet result; + result.m_value = mask; + return result; +} + +template<typename T> +inline typename std::underlying_type<T>::type +BitSet<T>::to_bitmask() const +{ + return m_value; +} + +} // namespace util diff --git a/unittest/CMakeLists.txt b/unittest/CMakeLists.txt index b129d59b..2a3edf0d 100644 --- a/unittest/CMakeLists.txt +++ b/unittest/CMakeLists.txt @@ -20,6 +20,7 @@ set( test_hashutil.cpp test_storage_local_StatsFile.cpp test_storage_local_util.cpp + test_util_BitSet.cpp test_util_Bytes.cpp test_util_Duration.cpp test_util_LockFile.cpp diff --git a/unittest/test_util_BitSet.cpp b/unittest/test_util_BitSet.cpp new file mode 100644 index 00000000..3130794a --- /dev/null +++ b/unittest/test_util_BitSet.cpp @@ -0,0 +1,76 @@ +// Copyright (C) 2023 Joel Rosdahl and other contributors +// +// See doc/AUTHORS.adoc for a complete list of contributors. +// +// 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 3 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 "../src/util/BitSet.hpp" +#include "TestUtil.hpp" + +#include <third_party/doctest.h> + +TEST_SUITE_BEGIN("BitSet"); + +TEST_CASE("Operations") +{ + enum class Test { A = 1U << 0, B = 1U << 1, C = 1U << 2 }; + + util::BitSet<Test> es; + CHECK(es.empty()); + CHECK(!es.contains(Test::A)); + CHECK(!es.contains(Test::B)); + CHECK(es.to_bitmask() == 0); + + es.insert(Test::A); + CHECK(!es.empty()); + CHECK(es.contains(Test::A)); + CHECK(!es.contains(Test::B)); + CHECK(es.to_bitmask() == 1); + + es.insert(Test::B); + CHECK(!es.empty()); + CHECK(es.contains(Test::A)); + CHECK(es.contains(Test::B)); + CHECK(es.to_bitmask() == 3); + + util::BitSet<Test> es2(es); + CHECK(!es2.empty()); + CHECK(es2.contains(Test::A)); + CHECK(es2.contains(Test::B)); + CHECK(es2.to_bitmask() == 3); + + es.erase(Test::A); + CHECK(!es.empty()); + CHECK(!es.contains(Test::A)); + CHECK(es.contains(Test::B)); + CHECK(es.to_bitmask() == 2); + + util::BitSet<Test> es3(Test::C); + es3.insert(es2); + CHECK(!es3.empty()); + CHECK(es3.contains(Test::A)); + CHECK(es3.contains(Test::B)); + CHECK(es3.contains(Test::C)); + CHECK(es3.to_bitmask() == 7); + + es3.erase(Test::B); + CHECK(!es3.empty()); + CHECK(es3.contains(Test::A)); + CHECK(!es3.contains(Test::B)); + CHECK(es3.contains(Test::C)); + CHECK(es3.to_bitmask() == 5); +} + +TEST_SUITE_END(); |