Enhanced config serializer.

[stg.git] / projects / sgconf / options.cpp

diff --git a/projects/sgconf/options.cpp b/projects/sgconf/options.cpp
index 71f9687ce73ff9117e1f8463ae5f93997eaef509..6a4eef1b6952cb9849945afffc857d59b36ff90d 100644 (file)
--- a/projects/sgconf/options.cpp
+++ b/projects/sgconf/options.cpp
@@ -23,12 +23,50 @@
 #include "action.h"
 #include "parser_state.h"
 
+#include "stg/common.h"
+
+#include <fstream>
+#include <sstream>
 #include <iostream>
 #include <functional>
 #include <algorithm>
 
+#include <unistd.h>
+
+namespace
+{
+
+template <class C>
+void ReadConfigFile(const std::string & filePath, void (C::* callback)(const std::string&, const std::string&), C * obj)
+{
+std::ifstream stream(filePath.c_str());
+std::string line;
+size_t num = 0;
+while (std::getline(stream, line))
+    {
+    ++num;
+    line = Trim(line);
+    std::string::size_type pos = line.find_first_of('#');
+    if (pos != std::string::npos)
+        line = line.substr(0, pos);
+    if (line.empty())
+        continue;
+    pos = line.find_first_of('=');
+    if (pos == std::string::npos)
+        {
+        std::ostringstream error;
+        error << "Bad file format, missing '=' in '" << filePath << ":" << num << "'.";
+        throw std::runtime_error(error.str().c_str());
+        }
+    (obj->*callback)(Trim(line.substr(0, pos)), Trim(line.substr(pos + 1, line.length() - pos - 1)));
+    }
+}
+
+} // namespace anonymous
+
 using SGCONF::OPTION;
 using SGCONF::OPTION_BLOCK;
+using SGCONF::OPTION_BLOCKS;
 using SGCONF::ACTION;
 using SGCONF::PARSER_STATE;
 
@@ -55,7 +93,7 @@ OPTION::OPTION(const std::string & longName,
 OPTION::OPTION(const OPTION & rhs)
     : m_shortName(rhs.m_shortName),
       m_longName(rhs.m_longName),
-      m_action(rhs.m_action),
+      m_action(rhs.m_action->Clone()),
       m_description(rhs.m_description)
 {
 }
@@ -65,6 +103,15 @@ OPTION::~OPTION()
 delete m_action;
 }
 
+OPTION & OPTION::operator=(const OPTION & rhs)
+{
+m_shortName = rhs.m_shortName;
+m_longName = rhs.m_longName;
+m_action = rhs.m_action->Clone();
+m_description = rhs.m_description;
+return *this;
+}
+
 void OPTION::Help(size_t level) const
 {
 if (!m_action)
@@ -100,32 +147,54 @@ try
     {
     return m_action->Parse(argc, argv);
     }
+catch (const ACTION::ERROR & ex)
+    {
+    if (m_longName.empty())
+        throw ERROR("-" + m_shortName + ": " + ex.what());
+    else
+        throw ERROR("--" + m_longName + ", -" + m_shortName + ": " + ex.what());
+    }
+}
+
+void OPTION::ParseValue(const std::string & value)
+{
+if (!m_action)
+    throw ERROR("Option is not defined.");
+try
+    {
+    return m_action->ParseValue(value);
+    }
 catch (const ACTION::ERROR & ex)
     {
     throw ERROR(m_longName + ": " + ex.what());
     }
 }
 
-void OPTION_BLOCK::Add(const std::string & shortName,
-                       const std::string & longName,
-                       ACTION * action,
-                       const std::string & description)
+OPTION_BLOCK & OPTION_BLOCK::Add(const std::string & shortName,
+                                 const std::string & longName,
+                                 ACTION * action,
+                                 const std::string & description)
 {
 m_options.push_back(OPTION(shortName, longName, action, description));
+return *this;
 }
 
-void OPTION_BLOCK::Add(const std::string & longName,
-                       ACTION * action,
-                       const std::string & description)
+OPTION_BLOCK & OPTION_BLOCK::Add(const std::string & longName,
+                                 ACTION * action,
+                                 const std::string & description)
 {
 m_options.push_back(OPTION(longName, action, description));
+return *this;
 }
 
 void OPTION_BLOCK::Help(size_t level) const
 {
+if (m_options.empty())
+    return;
+std::cout << m_description << ":\n";
 std::for_each(m_options.begin(),
               m_options.end(),
-              std::bind2nd(std::mem_fun_ref(&OPTION::Help), level));
+              std::bind2nd(std::mem_fun_ref(&OPTION::Help), level + 1));
 }
 
 PARSER_STATE OPTION_BLOCK::Parse(int argc, char ** argv)
@@ -138,6 +207,44 @@ while (state.argc > 0 && !state.stop)
         state = it->Parse(--state.argc, ++state.argv);
     else
         break;
+    ++it;
+    }
+return state;
+}
+
+void OPTION_BLOCK::ParseFile(const std::string & filePath)
+{
+if (access(filePath.c_str(), R_OK))
+    throw ERROR("File '" + filePath + "' does not exists.");
+ReadConfigFile(filePath, &OPTION_BLOCK::OptionCallback, this);
+}
+
+void OPTION_BLOCK::OptionCallback(const std::string & key, const std::string & value)
+{
+for (std::vector<OPTION>::iterator it = m_options.begin(); it != m_options.end(); ++it)
+    if (it->Name() == key)
+        it->ParseValue(value);
+}
+
+void OPTION_BLOCKS::Help(size_t level) const
+{
+std::list<OPTION_BLOCK>::const_iterator it(m_blocks.begin());
+while (it != m_blocks.end())
+    {
+    it->Help(level);
+    std::cout << "\n";
+    ++it;
+    }
+}
+
+PARSER_STATE OPTION_BLOCKS::Parse(int argc, char ** argv)
+{
+PARSER_STATE state(false, argc, argv);
+std::list<OPTION_BLOCK>::iterator it(m_blocks.begin());
+while (!state.stop && it != m_blocks.end())
+    {
+    state = it->Parse(state.argc, state.argv);
+    ++it;
     }
 return state;
 }