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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef CONFIG_SOURCE_H
#define CONFIG_SOURCE_H
#include <functional>
#include <map>
#include <string>
#include <stdio.h>
/**
* @brief Abstraction of a read-only configuration source
*/
class ReadOnlyConfigSource
{
public:
virtual ~ReadOnlyConfigSource() {}
virtual bool IsSet(const std::string& key) const;
virtual std::string GetString(const std::string& key) const;
const std::map<std::string, std::string>& GetData() const { return data; }
protected:
std::map<std::string, std::string> data;
};
/**
* @brief Abstraction of a writable configuration source
*/
class ReadWriteConfigSource : public ReadOnlyConfigSource
{
public:
virtual void SetString(const std::string& key, const std::string& value);
virtual void Delete(const std::string& key);
};
/**
* @brief Overlay configuration source
*
* Overlay settings get lost after the game ends. Values in the OPTIONS section
* of the start script will be put into the overlay and Lua scripts can choose
* to put certain values into the overlay.
*/
class OverlayConfigSource : public ReadWriteConfigSource
{
};
/**
* @brief File-backed configuration source
*/
class FileConfigSource : public ReadWriteConfigSource
{
public:
FileConfigSource(const std::string& filename);
void SetString(const std::string& key, const std::string& value) override;
void Delete(const std::string& key) override;
std::string GetFilename() const { return filename; }
private:
void SetStringInternal(const std::string& key, const std::string& value);
void DeleteInternal(const std::string& key);
void ReadModifyWrite(std::function<void ()> modify);
std::string filename;
std::map<std::string, std::string> comments;
// helper functions
void Read(FILE* file);
void Write(FILE* file);
char* Strip(char* begin, char* end);
};
/**
* @brief Configuration source that holds static defaults
*
* Keys and default values for each engine configuration variable
* are exposed by this class.
*/
class DefaultConfigSource : public ReadOnlyConfigSource
{
public:
DefaultConfigSource();
};
/**
* @brief Configuration source that holds safemode values
*
* Used when spring was started with "--safemode" param
*/
class SafemodeConfigSource : public ReadOnlyConfigSource
{
public:
SafemodeConfigSource();
};
/**
* @brief Configuration source that holds safemode values
*
* Used when spring was started with "--safemode" param
*/
class HeadlessConfigSource : public ReadOnlyConfigSource
{
public:
HeadlessConfigSource();
};
/**
* @brief Configuration source that holds safemode values
*
* Used when spring was started with "--safemode" param
*/
class DedicatedConfigSource : public ReadOnlyConfigSource
{
public:
DedicatedConfigSource();
};
#endif // CONFIG_SOURCE_H
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