Merge pull request #244 from MaSzyna-EU07/split/1-small-fixes

Split/1 small fixes

utilities/utilities.cpp

@@ -474,6 +474,26 @@ bool FileExists(std::string const &Filename)
 	return std::filesystem::exists(Filename);
 }
 
+std::string FileCased(std::filesystem::path const &Filename)
+{
+	std::error_code error;
+	if (std::filesystem::exists(Filename, error))
+		return Filename.string();
+#ifdef _WIN32
+	// the names there are found in any case already: no folder to go through for every file missing, nor names outside of the
+	// code page to throw on
+	return {};
+#else
+	// only the name of the file itself, a folder named in another case isn't found
+	auto const directory{Filename.has_parent_path() ? Filename.parent_path() : std::filesystem::path{"."}};
+	auto const wanted{ToLower(Filename.filename().string())};
+	for (std::filesystem::directory_iterator entry{directory, error}, end; entry != end; entry.increment(error))
+		if (ToLower(entry->path().filename().string()) == wanted)
+			return Filename.has_parent_path() ? (directory / entry->path().filename()).string() : entry->path().filename().string();
+	return {};
+#endif
+}
+
 std::pair<std::string, std::string> FileExists(std::vector<std::string> const &Names, std::vector<std::string> const &Extensions)
 {