Implement Version class

include/duckhandy/version_bt.hpp

@@ -0,0 +1,101 @@
+/* Copyright 2016-2021 Michele Santullo
+ * This file is part of "duckhandy".
+ *
+ * "duckhandy" 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.
+ *
+ * "duckhandy" 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 "duckhandy".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef id5594416333AA4792BFEC94E863E03B08
+#define id5594416333AA4792BFEC94E863E03B08
+
+#include "int_conv.hpp"
+#include <cstddef>
+#include <stdexcept>
+
+namespace dhandy {
+
+template <std::size_t N>
+class Version {
+public:
+	constexpr static std::size_t Count = N;
+
+	constexpr Version (const char* const ver, bool accept_less=false);
+
+	constexpr unsigned int operator[] (std::size_t idx) const;
+	constexpr unsigned int major() const;
+	constexpr unsigned int minor() const;
+	constexpr unsigned int revision() const;
+
+private:
+	unsigned int m_versions[N];
+};
+
+template <std::size_t N>
+inline constexpr Version<N>::Version (const char* const ver, bool accept_less) :
+	m_versions{0}
+{
+	std::size_t z = 0;
+	std::size_t s = 0;
+	std::size_t idx = 0;
+	bool commit = false;
+
+	do {
+		if (ver[z] >= '0' and ver[z] <= '9') {
+			commit = true;
+		}
+		else if (commit) {
+			commit = false;
+			m_versions[idx++] = dhandy::ary_to_int<unsigned int>(ver + s, ver + z);
+			s = z + 1;
+		}
+		else {
+			s = z + 1;
+		}
+	} while(ver[z++] and idx < N);
+
+	if (not accept_less and idx < N)
+		throw std::invalid_argument("Input version doesn't contain enough version numbers");
+}
+
+template <std::size_t N>
+inline constexpr unsigned int Version<N>::operator[] (std::size_t idx) const {
+	if (idx < N)
+		return m_versions[idx];
+	else
+		throw std::out_of_range("Index is out of range");
+}
+
+template <std::size_t N>
+inline constexpr unsigned int Version<N>::major() const {
+	return m_versions[0];
+}
+
+template <std::size_t N>
+inline constexpr unsigned int Version<N>::minor() const {
+	if constexpr (N > 1)
+		return m_versions[1];
+	else
+		throw std::out_of_range("Not enough version entries, there is no minor number");
+}
+
+template <std::size_t N>
+inline constexpr unsigned int Version<N>::revision() const {
+	if constexpr (N > 2)
+		return m_versions[2];
+	else
+		throw std::out_of_range("Not enough version entries, there is no revision number");
+}
+
+} //namespace dhandy
+
+#endif

test/unit/CMakeLists.txt

@@ -7,6 +7,7 @@ add_executable(${PROJECT_NAME}
 	reversed_sized_array_test.cpp
 	bitfield_pack_test.cpp
 	resource_pool_test.cpp
+	version_test.cpp
 )
 set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD 17)
 set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)

test/unit/version_test.cpp

@@ -0,0 +1,94 @@
+/* Copyright 2016-2021 Michele Santullo
+ * This file is part of "duckhandy".
+ *
+ * "duckhandy" 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.
+ *
+ * "duckhandy" 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 "duckhandy".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "catch2/catch.hpp"
+#include "duckhandy/version_bt.hpp"
+
+TEST_CASE ("Version class tests", "[version][bt]") {
+	using dhandy::Version;
+
+	{
+		constexpr Version<1> ver{"102"};
+		static_assert(ver.major() == 102, "Version error");
+		static_assert(ver.Count == 1, "Version error");
+		CHECK(ver[0] == 102);
+		CHECK_THROWS(ver[1]);
+		CHECK_THROWS(ver[2]);
+		CHECK_THROWS(ver[3]);
+		CHECK_THROWS(ver[4]);
+	}
+
+	{
+		constexpr Version<3> ver{".aheud15,a.ud22,cu.sh81,.nuad.h44"};
+		static_assert(ver.Count == 3, "Version error");
+		static_assert(ver.major() == 15, "Version error");
+		static_assert(ver.minor() == 22, "Version error");
+		static_assert(ver.revision() == 81, "Version error");
+		CHECK(ver[0] == 15);
+		CHECK(ver[1] == 22);
+		CHECK(ver[2] == 81);
+		CHECK_THROWS(ver[3]);
+		CHECK_THROWS(ver[4]);
+	}
+
+	{
+		constexpr Version<10> ver{"1.2.3.44.55.66.777.888.999.101010"};
+		static_assert(ver.Count == 10, "Version error");
+		static_assert(ver.major() == 1, "Version error");
+		static_assert(ver.minor() == 2, "Version error");
+		static_assert(ver.revision() == 3, "Version error");
+		CHECK(ver[0] == 1);
+		CHECK(ver[1] == 2);
+		CHECK(ver[2] == 3);
+		CHECK(ver[3] == 44);
+		CHECK(ver[4] == 55);
+		CHECK(ver[5] == 66);
+		CHECK(ver[6] == 777);
+		CHECK(ver[7] == 888);
+		CHECK(ver[8] == 999);
+		CHECK(ver[9] == 101010);
+		CHECK_THROWS(ver[10]);
+	}
+
+	{
+		constexpr Version<4> ver{"1.2.3.", true};
+		static_assert(ver.Count == 4, "Version error");
+		static_assert(ver.major() == 1, "Version error");
+		static_assert(ver.minor() == 2, "Version error");
+		static_assert(ver.revision() == 3, "Version error");
+		CHECK(ver[0] == 1);
+		CHECK(ver[1] == 2);
+		CHECK(ver[2] == 3);
+		CHECK(ver[3] == 0);
+		CHECK_THROWS(ver[10]);
+	}
+
+	{
+		constexpr Version<4> ver{"6.7.2-r1"};
+		static_assert(ver.Count == 4, "Version error");
+		static_assert(ver.major() == 6, "Version error");
+		static_assert(ver.minor() == 7, "Version error");
+		static_assert(ver.revision() == 2, "Version error");
+		CHECK(ver[0] == 6);
+		CHECK(ver[1] == 7);
+		CHECK(ver[2] == 2);
+		CHECK(ver[3] == 1);
+		CHECK_THROWS(ver[10]);
+	}
+
+	CHECK_THROWS(Version<4>{"4.5"});
+}