enhance: Add util::PathString

diff --git a/src/util/PathString.hpp b/src/util/PathString.hpp
new file mode 100644 (file)
index 0000000..a215566
--- /dev/null
+++ b/src/util/PathString.hpp
@@ -0,0 +1,83 @@
+// Copyright (C) 2024 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 <filesystem>
+#include <string>
+
+namespace util {
+
+// std::filesystem::path wrapper for accessing the underlying path string
+// without having to copy it if std::filesystem::path::value_type is char (that
+// is, not wchar_t).
+class PathString
+{
+public:
+  PathString(const std::filesystem::path& path);
+
+  operator const std::string&() const;
+  operator const char*() const;
+
+  const std::string& str() const;
+  const char* c_str() const;
+
+private:
+#ifdef _WIN32
+  std::string m_path;
+#else
+  const std::filesystem::path& m_path;
+#endif
+};
+
+inline PathString::PathString(const std::filesystem::path& path)
+#ifdef _WIN32
+  : m_path(path.string())
+#else
+  : m_path(path)
+#endif
+{
+}
+
+inline PathString::operator const std::string&() const
+{
+  return str();
+}
+
+inline PathString::operator const char*() const
+{
+  return c_str();
+}
+
+inline const std::string&
+PathString::str() const
+{
+#ifdef _WIN32
+  return m_path;
+#else
+  return m_path.native();
+#endif
+}
+
+inline const char*
+PathString::c_str() const
+{
+  return str().c_str();
+}
+
+} // namespace util