utils: bugfix & refactoring

1 files changed, 84 insertions, 0 deletions

diff --git a/utils/file_cmd_parser.hpp b/utils/file_cmd_parser.hpp
new file mode 100644
index 0000000..f20d80f
--- /dev/null
+++ b/utils/file_cmd_parser.hpp
@@ -0,0 +1,84 @@
+/**
+ * \file
+ * \author Egor Tensin <Egor.Tensin@gmail.com>
+ * \date 2015
+ * \copyright This file is licensed under the terms of the MIT License.
+ *            See LICENSE.txt for details.
+ */
+
+#pragma once
+
+#include "data_parsers.hpp"
+
+#include <aesnixx/all.hpp>
+
+#include <boost/program_options.hpp>
+
+#include <ostream>
+#include <string>
+#include <vector>
+
+namespace
+{
+    class CommandLineParser
+    {
+    public:
+        CommandLineParser(const char* prog_name)
+            : prog_name(prog_name)
+            , options("Options")
+        {
+            namespace po = boost::program_options;
+
+            options.add_options()
+                ("help,h", "show this message and exit")
+                ("mode,m", po::value<aesni::Mode>(&mode)->required(), "set mode of operation")
+                ("algorithm,a", po::value<aesni::Algorithm>(&algorithm)->required(), "set algorithm");
+        }
+
+        void parse(int argc, char** argv)
+        {
+            namespace po = boost::program_options;
+
+            po::options_description hidden_options;
+            hidden_options.add_options()
+                ("positional", po::value<std::vector<std::string>>(&args));
+
+            po::options_description all_options;
+            all_options.add(options).add(hidden_options);
+
+            po::positional_options_description positional_options;
+            positional_options.add("positional", -1);
+
+            po::variables_map vm;
+            po::store(po::command_line_parser(argc, argv).options(all_options).positional(positional_options).run(), vm);
+
+            if (vm.count("help"))
+            {
+                help_flag = true;
+                return;
+            }
+
+            po::notify(vm);
+        }
+
+        bool requested_help() const { return help_flag; }
+
+        aesni::Mode mode;
+        aesni::Algorithm algorithm;
+        std::vector<std::string> args;
+
+    private:
+        const std::string prog_name;
+        boost::program_options::options_description options;
+
+        bool help_flag = false;
+
+        friend std::ostream& operator<<(std::ostream&, const CommandLineParser&);
+    };
+
+    std::ostream& operator<<(std::ostream& os, const CommandLineParser& cmd_parser)
+    {
+        return os << "Usage: " << cmd_parser.prog_name << " [OPTIONS...] KEY [IV] SRC_PATH DEST_PATH\n"
+                  << cmd_parser.options << "\n";
+    }
+}