src/metadata.h

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #pragma once
  21
  22 #include "irr_v3d.h"
  23 #include <iostream>
  24 #include <vector>
  25 #include "util/string.h"
  26
  27 class Metadata
  28 {
  29         bool m_modified = false;
  30 public:
  31         virtual ~Metadata() = default;
  32
  33         virtual void clear();
  34         virtual bool empty() const;
  35
  36         bool operator==(const Metadata &other) const;
  37         inline bool operator!=(const Metadata &other) const
  38         {
  39                 return !(*this == other);
  40         }
  41
  42         //
  43         // Key-value related
  44         //
  45
  46         size_t size() const;
  47         bool contains(const std::string &name) const;
  48         const std::string &getString(const std::string &name, u16 recursion = 0) const;
  49         bool getStringToRef(const std::string &name, std::string &str, u16 recursion = 0) const;
  50         virtual bool setString(const std::string &name, const std::string &var);
  51         inline bool removeString(const std::string &name) { return setString(name, ""); }
  52         const StringMap &getStrings() const
  53         {
  54                 return m_stringvars;
  55         }
  56         // Add support for variable names in values
  57         const std::string &resolveString(const std::string &str, u16 recursion = 0) const;
  58
  59         inline bool isModified() const  { return m_modified; }
  60         inline void setModified(bool v) { m_modified = v; }
  61 protected:
  62         StringMap m_stringvars;
  63 };