Added command line parser prototype.

[stg.git] / projects / sgconf / composer.h

diff --git a/projects/sgconf/composer.h b/projects/sgconf/composer.h
new file mode 100644 (file)
index 0000000..a68bce9
--- /dev/null
+++ b/projects/sgconf/composer.h
@@ -0,0 +1,79 @@
+/*
+ *    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 2 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ *    Author : Maxim Mamontov <faust@stargazer.dp.ua>
+ */
+
+#ifndef __STG_SGCONF_COMPOSER_H__
+#define __STG_SGCONF_COMPOSER_H__
+
+#include "parser_state.h"
+
+namespace SGCONF
+{
+
+class COMPOSER
+{
+    public:
+        typedef PARSER_STATE (* FUNC)(int, char **, CONFIG&);
+        COMPOSER(int argc, char ** argv)
+            : m_done(false), m_result(0)
+        { mstate.argc = argc; m_state.argv = argv; }
+        COMPOSER compose(FUNC func)
+        {
+        if (m_done)
+            return COMPOSER(m_result);
+        try
+            {
+            PARSER_STATE state(func(m_state.argc, m_state.argv, m_state.config));
+            if (state.result)
+                return COMPOSER(0);
+            else
+                return COMPOSER(state);
+            }
+        catch (const PARSER_ERROR& ex)
+            {
+            std::cerr << ex.what() << "\n";
+            return COMPOSER(-1);
+            }
+        }
+        int exec()
+        {
+        if (m_done)
+            return m_result;
+        Usage();
+        return -1;
+        }
+
+    private:
+        bool m_done;
+        int m_result;
+        PARSER_STATE m_state;
+
+        COMPOSER(int result)
+            : m_done(true),
+              m_result(result)
+        {
+        }
+
+        COMPOSER(const PARSER_STATE& state)
+            : m_done(false),
+              m_result(0),
+              m_state(state)
+};
+
+}