mirror of
https://github.com/wesnoth/wesnoth
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69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/*
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Copyright (C) 2008 - 2015 by David White <dave@whitevine.net>
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Part of the Battle for Wesnoth Project http://www.wesnoth.org/
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY.
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See the COPYING file for more details.
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*/
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#ifndef UNIT_ID_HPP_INCLUDED
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#define UNIT_ID_HPP_INCLUDED
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#include <ctime>
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#include <boost/noncopyable.hpp>
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namespace n_unit {
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struct unit_id
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{
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unit_id() : value(0) {}
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explicit unit_id(size_t val) : value(val) {}
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static const size_t highest_bit = static_cast<size_t>(1) << (sizeof(size_t) * 8 - 1);
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size_t value;
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bool is_fake() const { return (value & highest_bit) != 0; }
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bool is_empty() const { return !value; }
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static unit_id create_real(size_t val) { return unit_id(val); }
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static unit_id create_fake(size_t val) { return unit_id(val + highest_bit); }
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friend bool operator <(unit_id a, unit_id b) { return a < b; }
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friend bool operator <=(unit_id a, unit_id b) { return a <= b; }
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friend bool operator ==(unit_id a, unit_id b) { return a == b; }
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friend bool operator >=(unit_id a, unit_id b) { return a >= b; }
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friend bool operator >(unit_id a, unit_id b) { return a > b; }
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};
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class id_manager : private boost::noncopyable {
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private:
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size_t next_id_;
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size_t fake_id_;
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static id_manager manager_;
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id_manager();
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public:
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static id_manager& instance();
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/** returns id for unit that is created */
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unit_id next_id();
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unit_id next_fake_id();
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/** Used for saving id to savegame */
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size_t get_save_id();
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void set_save_id(size_t);
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/** Clears id counter after game */
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void clear();
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void reset_fake();
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};
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}
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#endif
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