icinga2/lib/config/configcompiler.h

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/******************************************************************************
* Icinga 2 *
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* Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/) *
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* *
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#ifndef CONFIGCOMPILER_H
#define CONFIGCOMPILER_H
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#include "config/i2-config.h"
#include "config/debuginfo.h"
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#include "base/registry.h"
#include <iostream>
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#include <boost/function.hpp>
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namespace icinga
{
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/**
* The configuration compiler can be used to compile a configuration file
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* into a number of configuration items.
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*
* @ingroup config
*/
class I2_CONFIG_API ConfigCompiler
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{
public:
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typedef boost::function<void (const String&, bool, const DebugInfo&)> HandleIncludeFunc;
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explicit ConfigCompiler(const String& path, std::istream *input,
HandleIncludeFunc includeHandler = &ConfigCompiler::HandleFileInclude);
virtual ~ConfigCompiler(void);
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void Compile(void);
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static void CompileStream(const String& path, std::istream *stream);
static void CompileFile(const String& path);
static void CompileText(const String& path, const String& text);
static void AddIncludeSearchDir(const String& dir);
String GetPath(void) const;
static void HandleFileInclude(const String& include, bool search,
const DebugInfo& debuginfo);
/* internally used methods */
void HandleInclude(const String& include, bool search, const DebugInfo& debuginfo);
void HandleLibrary(const String& library);
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size_t ReadInput(char *buffer, size_t max_bytes);
void *GetScanner(void) const;
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private:
String m_Path;
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std::istream *m_Input;
HandleIncludeFunc m_HandleInclude;
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void *m_Scanner;
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static std::vector<String> m_IncludeSearchDirs;
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void InitializeScanner(void);
void DestroyScanner(void);
};
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class I2_CONFIG_API ConfigFragmentRegistry : public Registry<String>
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{ };
/**
* Helper class for registering config fragments.
*
* @ingroup base
*/
class RegisterConfigFragmentHelper
{
public:
RegisterConfigFragmentHelper(const String& name, const String& fragment)
{
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ConfigFragmentRegistry::GetInstance()->Register(name, fragment);
}
};
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#define REGISTER_CONFIG_FRAGMENT(id, name, fragment) \
I2_EXPORT icinga::RegisterConfigFragmentHelper g_RegisterCF_ ## id(name, fragment)
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}
#endif /* CONFIGCOMPILER_H */