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authorMarkus Koschany <apo@gambaru.de>2015-01-20 10:50:00 +0100
committerCraig Robbins <kde.psych@gmail.com>2015-01-20 22:47:45 +1000
commit60d745126f8cdb2463fa36de7e3a50e8226cbc27 (patch)
tree25f3ccc7c0800f8ac69c959780b0da918a641499 /src/database-dummy.h
parentd4786d8d5deae316b67159e63aa36821199878af (diff)
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Fix hyphen used as minus sign
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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#pragma once

#include "irrlichttypes_bloated.h"
#include "util/string.h"
#include "util/basic_macros.h"
#include <string>
#include <list>
#include <set>
#include <mutex>

class Settings;
struct NoiseParams;

// Global objects
extern Settings *g_settings; // Same as Settings::getLayer(SL_GLOBAL);
extern std::string g_settings_path;

// Type for a settings changed callback function
typedef void (*SettingsChangedCallback)(const std::string &name, void *data);

typedef std::vector<
	std::pair<
		SettingsChangedCallback,
		void *
	>
> SettingsCallbackList;

typedef std::unordered_map<std::string, SettingsCallbackList> SettingsCallbackMap;

enum ValueType {
	VALUETYPE_STRING,
	VALUETYPE_FLAG // Doesn't take any arguments
};

enum SettingsParseEvent {
	SPE_NONE,
	SPE_INVALID,
	SPE_COMMENT,
	SPE_KVPAIR,
	SPE_END,
	SPE_GROUP,
	SPE_MULTILINE,
};

// Describes the global setting layers, SL_GLOBAL is where settings are read from
enum SettingsLayer {
	SL_DEFAULTS,
	SL_GAME,
	SL_GLOBAL,
	SL_TOTAL_COUNT
};

// Implements the hierarchy a settings object may be part of
class SettingsHierarchy {
public:
	/*
	 * A settings object that may be part of another hierarchy can
	 * occupy the index 0 as a fallback. If not set you can use 0 on your own.
	 */
	SettingsHierarchy(Settings *fallback = nullptr);

	DISABLE_CLASS_COPY(SettingsHierarchy)

	Settings *getLayer(int layer) const;

private:
	friend class Settings;
	Settings *getParent(int layer) const;
	void onLayerCreated(int layer, Settings *obj);
	void onLayerRemoved(int layer);

	std::vector<Settings*> layers;
};

struct ValueSpec {
	ValueSpec(ValueType a_type, const char *a_help=NULL)
	{
		type = a_type;
		help = a_help;
	}

	ValueType type;
	const char *help;
};

struct SettingsEntry {
	SettingsEntry() = default;

	SettingsEntry(const std::string &value_) :
		value(value_)
	{}

	SettingsEntry(Settings *group_) :
		group(group_),
		is_group(true)
	{}

	std::string value = "";
	Settings *group = nullptr;
	bool is_group = false;
};

typedef std::unordered_map<std::string, SettingsEntry> SettingEntries;

class Settings {
public:
	/* These functions operate on the global hierarchy! */
	static Settings *createLayer(SettingsLayer sl, const std::string &end_tag = "");
	static Settings *getLayer(SettingsLayer sl);
	/**/

	Settings(const std::string &end_tag = "") :
		m_end_tag(end_tag)
	{}
	Settings(const std::string &end_tag, SettingsHierarchy *h, int settings_layer);
	~Settings();

	Settings & operator += (const Settings &other);
	Settings & operator = (const Settings &other);

	/***********************
	 * Reading and writing *