mirror of
https://github.com/minetest/minetest.git
synced 2024-11-27 10:03:45 +01:00
118 lines
3.5 KiB
C++
118 lines
3.5 KiB
C++
/*
|
|
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 "irr_v3d.h"
|
|
#include <iostream>
|
|
#include <vector>
|
|
#include "util/string.h"
|
|
|
|
// Basic metadata interface
|
|
class IMetadata
|
|
{
|
|
public:
|
|
virtual ~IMetadata() = default;
|
|
|
|
virtual void clear() = 0;
|
|
|
|
bool operator==(const IMetadata &other) const;
|
|
inline bool operator!=(const IMetadata &other) const
|
|
{
|
|
return !(*this == other);
|
|
}
|
|
|
|
//
|
|
// Key-value related
|
|
//
|
|
|
|
virtual bool contains(const std::string &name) const = 0;
|
|
|
|
// May (not must!) put a string in `place` and return a reference to that string.
|
|
const std::string &getString(const std::string &name, std::string *place,
|
|
u16 recursion = 0) const;
|
|
|
|
// If the entry is present, puts the value in str and returns true;
|
|
// otherwise just returns false.
|
|
bool getStringToRef(const std::string &name, std::string &str, u16 recursion = 0) const;
|
|
|
|
// Returns whether the metadata was (potentially) changed.
|
|
virtual bool setString(const std::string &name, const std::string &var) = 0;
|
|
|
|
inline bool removeString(const std::string &name) { return setString(name, ""); }
|
|
|
|
// May (not must!) put strings in `place` and return a reference to these strings.
|
|
virtual const StringMap &getStrings(StringMap *place) const = 0;
|
|
|
|
// Add support for variable names in values. Uses place like getString.
|
|
const std::string &resolveString(const std::string &str, std::string *place,
|
|
u16 recursion = 0) const;
|
|
|
|
protected:
|
|
// Returns nullptr to indicate absence of value. Uses place like getString.
|
|
virtual const std::string *getStringRaw(const std::string &name,
|
|
std::string *place) const = 0;
|
|
};
|
|
|
|
// Simple metadata parent class (in-memory storage)
|
|
class SimpleMetadata: public virtual IMetadata
|
|
{
|
|
bool m_modified = false;
|
|
public:
|
|
virtual ~SimpleMetadata() = default;
|
|
|
|
virtual void clear() override;
|
|
virtual bool empty() const;
|
|
|
|
//
|
|
// Key-value related
|
|
//
|
|
|
|
size_t size() const;
|
|
bool contains(const std::string &name) const override;
|
|
virtual bool setString(const std::string &name, const std::string &var) override;
|
|
const StringMap &getStrings(StringMap *) const override final;
|
|
|
|
// Simple version of getters, possible due to in-memory storage:
|
|
|
|
inline const std::string &getString(const std::string &name, u16 recursion = 0) const
|
|
{
|
|
return IMetadata::getString(name, nullptr, recursion);
|
|
}
|
|
|
|
inline const std::string &resolveString(const std::string &str, u16 recursion = 0) const
|
|
{
|
|
return IMetadata::resolveString(str, nullptr, recursion);
|
|
}
|
|
|
|
inline const StringMap &getStrings() const
|
|
{
|
|
return SimpleMetadata::getStrings(nullptr);
|
|
}
|
|
|
|
inline bool isModified() const { return m_modified; }
|
|
inline void setModified(bool v) { m_modified = v; }
|
|
|
|
protected:
|
|
StringMap m_stringvars;
|
|
|
|
const std::string *getStringRaw(const std::string &name,
|
|
std::string *) const override final;
|
|
};
|