X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/df2bb45e41303b5132feb6b264caaa01c31b8bb5..59fa9c93d72d1e065274dadc44a53595fd54648a:/projects/sgconf/options.cpp?ds=inline

diff --git a/projects/sgconf/options.cpp b/projects/sgconf/options.cpp
index 71f9687c..06378d1c 100644
--- a/projects/sgconf/options.cpp
+++ b/projects/sgconf/options.cpp
@@ -23,121 +23,206 @@
 #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;
 
 OPTION::OPTION(const std::string & shortName,
                const std::string & longName,
-               ACTION * action,
+               std::unique_ptr<ACTION> action,
                const std::string & description)
     : m_shortName(shortName),
       m_longName(longName),
-      m_action(action),
+      m_action(std::move(action)),
       m_description(description)
 {
 }
 
 OPTION::OPTION(const std::string & longName,
-               ACTION * action,
+               std::unique_ptr<ACTION> action,
                const std::string & description)
     : m_longName(longName),
-      m_action(action),
+      m_action(std::move(action)),
       m_description(description)
 {
 }
 
-OPTION::OPTION(const OPTION & rhs)
-    : m_shortName(rhs.m_shortName),
-      m_longName(rhs.m_longName),
-      m_action(rhs.m_action),
-      m_description(rhs.m_description)
+void OPTION::Help(size_t level) const
 {
+    if (!m_action)
+        throw ERROR("Option is not defined.");
+    std::string indent(level, '\t');
+    std::cout << indent;
+    if (!m_shortName.empty())
+        std::cout << "-" << m_shortName << ", ";
+    std::cout << "--" << m_longName << " " << m_action->ParamDescription()
+              << "\t" << m_description << m_action->DefaultDescription() << "\n";
+    m_action->Suboptions().Help(level);
 }
 
-OPTION::~OPTION()
+bool OPTION::Check(const char * arg) const
 {
-delete m_action;
+    if (arg == NULL)
+        return false;
+
+    if (*arg++ != '-')
+        return false;
+
+    if (*arg == '-')
+        return m_longName == arg + 1;
+
+    return m_shortName == arg;
 }
 
-void OPTION::Help(size_t level) const
+PARSER_STATE OPTION::Parse(int argc, char ** argv, void * data)
 {
-if (!m_action)
-    throw ERROR("Option is not defined.");
-std::string indent(level, '\t');
-std::cout << indent << "\t";
-if (!m_shortName.empty())
-    std::cout << "-" << m_shortName << ", ";
-std::cout << "--" << m_longName << " " << m_action->ParamDescription()
-          << "\t" << m_description << m_action->DefaultDescription() << "\n";
-m_action->Suboptions().Help(level + 1);
+    if (!m_action)
+        throw ERROR("Option is not defined.");
+    try
+    {
+        return m_action->Parse(argc, argv, data);
+    }
+    catch (const ACTION::ERROR & ex)
+    {
+        if (m_longName.empty())
+            throw ERROR("-" + m_shortName + ": " + ex.what());
+        else
+            throw m_shortName.empty() ? ERROR("--" + m_longName + ": " + ex.what())
+                                      : ERROR("--" + m_longName + ", -" + m_shortName + ": " + ex.what());
+    }
 }
 
-bool OPTION::Check(const char * arg) const
+void OPTION::ParseValue(const std::string & value)
 {
-if (arg == NULL)
-    return false;
+    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());
+    }
+}
 
-if (*arg++ != '-')
-    return false;
+OPTION_BLOCK & OPTION_BLOCK::Add(const std::string & shortName,
+                                 const std::string & longName,
+                                 std::unique_ptr<ACTION> action,
+                                 const std::string & description)
+{
+    m_options.emplace_back(shortName, longName, std::move(action), description);
+    return *this;
+}
 
-if (*arg == '-')
-    return m_longName == arg + 1;
+OPTION_BLOCK & OPTION_BLOCK::Add(const std::string & longName,
+                                 std::unique_ptr<ACTION> action,
+                                 const std::string & description)
+{
+    m_options.emplace_back(longName, std::move(action), description);
+    return *this;
+}
 
-return m_shortName == arg;
+void OPTION_BLOCK::Help(size_t level) const
+{
+    if (m_options.empty())
+        return;
+    if (!m_description.empty())
+        std::cout << m_description << ":\n";
+    for (const auto& option : m_options)
+        option.Help(level + 1);
 }
 
-PARSER_STATE OPTION::Parse(int argc, char ** argv)
+PARSER_STATE OPTION_BLOCK::Parse(int argc, char ** argv, void * data)
 {
-if (!m_action)
-    throw ERROR("Option is not defined.");
-try
+    PARSER_STATE state(false, argc, argv);
+    if (state.argc == 0)
+        return state;
+    while (state.argc > 0 && !state.stop)
     {
-    return m_action->Parse(argc, argv);
-    }
-catch (const ACTION::ERROR & ex)
-    {
-    throw ERROR(m_longName + ": " + ex.what());
+        const auto it = std::find_if(m_options.begin(), m_options.end(), [&state](const auto& opt){ return opt.Check(*state.argv); });
+        if (it != m_options.end())
+            state = it->Parse(--state.argc, ++state.argv, data);
+        else
+            break;
     }
+    return state;
 }
 
-void OPTION_BLOCK::Add(const std::string & shortName,
-                       const std::string & longName,
-                       ACTION * action,
-                       const std::string & description)
+void OPTION_BLOCK::ParseFile(const std::string & filePath)
 {
-m_options.push_back(OPTION(shortName, longName, action, description));
+    if (access(filePath.c_str(), R_OK))
+        throw ERROR("File '" + filePath + "' does not exists.");
+    ReadConfigFile(filePath, &OPTION_BLOCK::OptionCallback, this);
 }
 
-void OPTION_BLOCK::Add(const std::string & longName,
-                       ACTION * action,
-                       const std::string & description)
+void OPTION_BLOCK::OptionCallback(const std::string & key, const std::string & value)
 {
-m_options.push_back(OPTION(longName, action, description));
+    for (auto& option : m_options)
+        if (option.Name() == key)
+            option.ParseValue(value);
 }
 
-void OPTION_BLOCK::Help(size_t level) const
+void OPTION_BLOCKS::Help(size_t level) const
 {
-std::for_each(m_options.begin(),
-              m_options.end(),
-              std::bind2nd(std::mem_fun_ref(&OPTION::Help), level));
+    for (const auto& block : m_blocks)
+    {
+        block.Help(level);
+        std::cout << "\n";
+    }
 }
 
-PARSER_STATE OPTION_BLOCK::Parse(int argc, char ** argv)
+PARSER_STATE OPTION_BLOCKS::Parse(int argc, char ** argv)
 {
-PARSER_STATE state(false, argc, argv);
-while (state.argc > 0 && !state.stop)
+    PARSER_STATE state(false, argc, argv);
+    auto it = m_blocks.begin();
+    while (state.argc > 0 && !state.stop && it != m_blocks.end())
     {
-    std::vector<OPTION>::iterator it = std::find_if(m_options.begin(), m_options.end(), std::bind2nd(std::mem_fun_ref(&OPTION::Check), *state.argv));
-    if (it != m_options.end())
-        state = it->Parse(--state.argc, ++state.argv);
-    else
-        break;
+        state = it->Parse(state.argc, state.argv);
+        ++it;
     }
-return state;
+    return state;
 }