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src/Core/Options.h

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+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+
+
+#ifndef U_CORE_OPTIONS_H
+#define U_CORE_OPTIONS_H
+
+#include <boost/program_options.hpp>
+
+namespace uLib {
+
+namespace detail {
+
+struct Options {
+
+    /**
+     * Wrapper for boost program_options easy init syntax
+     */
+    class options_description_easy_init  {
+        typedef boost::program_options::options_description_easy_init InitClass;
+        InitClass m_init;
+    public:
+        options_description_easy_init(InitClass init) :
+            m_init(init) {}
+
+
+        options_description_easy_init&
+        operator()(const char* name,
+                   const char* description)
+        {
+            m_init(name,description);
+            return *this;
+        }
+
+        options_description_easy_init&
+        operator()(const char* name,
+                   const boost::program_options::value_semantic* s)
+        {
+            m_init(name,s);
+            return *this;
+        }
+
+
+        options_description_easy_init&
+        operator()(const char* name,
+                   const boost::program_options::value_semantic* s,
+                   const char* description)
+        {
+            m_init(name,s,description);
+            return *this;
+        }
+
+
+        template <typename T>
+        options_description_easy_init&
+        operator()(const char* name,
+                   T * value,
+                   const T default_value,
+                   const char* description)
+        {
+            m_init(name,
+                   boost::program_options::value<T>(value)->default_value(default_value),
+                   description);
+            return *this;
+        }
+
+        template <typename T>
+        options_description_easy_init&
+        operator()(const char* name,
+                   T * value,
+                   const char* description)
+        {
+            assert(value);
+            m_init(name,
+                   boost::program_options::value<T>(value)->default_value(*value),
+                   description);
+            return *this;
+        }
+
+        template <typename T>
+        options_description_easy_init&
+        operator()(const char* name,
+                   T * value,
+                   const T default_value)
+        {
+            m_init(name,
+                   boost::program_options::value<T>(value)->default_value(default_value));
+            return *this;
+        }
+
+        template <typename T>
+        options_description_easy_init&
+        operator()(const char* name,
+                   T * value)
+        {
+            assert(value);
+            m_init(name,
+                   boost::program_options::value<T>(value)->default_value(*value));
+            return *this;
+        }
+
+    };
+
+}; // Options
+
+} // detail
+
+
+
+class Options {
+    boost::program_options::options_description m_global;
+    boost::program_options::options_description m_configuration;
+    boost::program_options::positional_options_description m_posdesc;
+    boost::program_options::variables_map m_vm;
+
+public:
+    typedef detail::Options::options_description_easy_init initType;
+
+    Options(const char *str = "Program options");
+
+    initType add_options() {        
+        return initType(m_global.add_options());
+    }
+
+    initType add_config_options() {
+        return initType(m_configuration.add_options());
+    }
+
+    void add_positional_option(const char *name, int max_count) {
+        // TODO:
+        //        m_posdesc(name,max_count);
+    }
+
+    void parse_command_line(int argc, char *argv[]);
+
+    void parse_config_file(std::string &str);
+
+    void parse_config_file(const char *fname);
+
+    template <typename T>
+    static inline boost::program_options::typed_value<T>* value(T *v, T dvalue) {
+        boost::program_options::typed_value<T> *r = boost::program_options::value<T>(v);
+        r->default_value(dvalue);
+        return r;
+    }
+
+    bool count(const char *str) const;
+
+};
+
+
+} // uLib
+
+
+
+#endif // U_CORE_OPTIONS_H