add version API

src/pmp/Version.cpp

@@ -0,0 +1,84 @@
+//=============================================================================
+// Copyright (C) 2019 The pmp-library developers
+// Copyright (c) 2010 Martin Reddy. All rights reserved.
+//
+// This file is part of the Polygon Mesh Processing Library.
+// Distributed under the terms of the MIT license, see LICENSE.txt for details.
+//
+// SPDX-License-Identifier: MIT
+//=============================================================================
+
+#include <pmp/Version.h>
+
+#include <sstream>
+#include <string>
+#include <set>
+
+//=============================================================================
+
+namespace pmp {
+
+//=============================================================================
+
+int Version::get_major()
+{
+    return int(PMP_MAJOR_VERSION);
+}
+
+int Version::get_minor()
+{
+    return int(PMP_MINOR_VERSION);
+}
+
+int Version::get_patch()
+{
+    return int(PMP_PATCH_VERSION);
+}
+
+std::string Version::get_version()
+{
+    static std::string version("");
+
+    if (version.empty())
+    {
+        // cache the version string
+        std::ostringstream stream;
+        stream << PMP_MAJOR_VERSION << "." << PMP_MINOR_VERSION << "."
+               << PMP_PATCH_VERSION;
+        version = stream.str();
+    }
+
+    return version;
+}
+
+bool Version::is_at_least(int major, int minor, int patch)
+{
+    if (PMP_MAJOR_VERSION < major)
+        return false;
+    if (PMP_MAJOR_VERSION > major)
+        return true;
+    if (PMP_MINOR_VERSION < minor)
+        return false;
+    if (PMP_MINOR_VERSION > minor)
+        return true;
+    if (PMP_PATCH_VERSION < patch)
+        return false;
+    return true;
+}
+
+bool Version::has_feature(const std::string& name)
+{
+    static std::set<std::string> features;
+
+    if (features.empty())
+    {
+        // cache the feature list
+        // features.insert("XXX");
+    }
+
+    return features.find(name) != features.end();
+}
+
+//=============================================================================
+} // namespace pmp
+//=============================================================================

src/pmp/Version.h

@@ -0,0 +1,55 @@
+//=============================================================================
+// Copyright (C) 2019 The pmp-library developers
+// Copyright (c) 2010 Martin Reddy. All rights reserved.
+//
+// This file is part of the Polygon Mesh Processing Library.
+// Distributed under the terms of the MIT license, see LICENSE.txt for details.
+//
+// SPDX-License-Identifier: MIT
+//=============================================================================
+#pragma once
+//=============================================================================
+
+#include <string>
+
+#define PMP_MAJOR_VERSION 0
+#define PMP_MINOR_VERSION 1
+#define PMP_PATCH_VERSION 0
+
+//=============================================================================
+
+namespace pmp {
+
+//=============================================================================
+
+//! \addtogroup core core
+//!@{
+
+//! API version information
+class Version
+{
+public:
+    //! return the major version number
+    static int get_major();
+
+    //! return the minor version number
+    static int get_minor();
+
+    //! return the patch version number
+    static int get_patch();
+
+    //! return the current API version number as a string
+    static std::string get_version();
+
+    //! return true if the current version >= (major, minor, patch)
+    static bool is_at_least(int major, int minor, int patch);
+
+    //! return true if the named feature is available in this version
+    static bool has_feature(const std::string &name);
+};
+
+//=============================================================================
+//!@}
+//=============================================================================
+} // namespace pmp
+//=============================================================================