mirror of
https://github.com/moparisthebest/minetest
synced 2024-11-11 20:05:05 -05:00
80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
/*
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Minetest-c55
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Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
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Copyright (C) 2012 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
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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; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef FILECACHE_HEADER
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#define FILECACHE_HEADER
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#include <string>
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#include <iostream>
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class FileCache
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{
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public:
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/*
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'dir' is the file cache directory to use.
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*/
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FileCache(std::string dir):
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m_dir(dir)
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{
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}
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/*
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Searches the cache for a file with a given name.
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If the file is found, lookup copies it into 'os' and
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returns true. Otherwise false is returned.
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*/
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bool loadByName(const std::string &name, std::ostream &os);
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/*
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Stores a file in the cache based on its name.
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Returns true on success, false otherwise.
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*/
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bool updateByName(const std::string &name, const std::string &data);
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/*
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Loads a file based on a check sum, which may be any kind of
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rather unique byte sequence. Returns true, if the file could
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be written into os, false otherwise.
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A file name is required to give the disk file a name that
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has the right file name extension (e.g. ".png").
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*/
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bool loadByChecksum(const std::string &name, std::ostream &os,
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const std::string &checksum);
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/*
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Stores a file in the cache based on its checksum.
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Returns true on success, false otherwise.
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*/
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bool updateByChecksum(const std::string &name, const std::string &data,
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const std::string &checksum);
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private:
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std::string m_dir;
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bool loadByPath(const std::string &name, std::ostream &os,
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const std::string &path);
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bool updateByPath(const std::string &name, const std::string &data,
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const std::string &path);
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std::string getPathFromChecksum(const std::string &name,
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const std::string &checksum);
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};
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#endif
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