From 4bf5065a9cdaf55a6915e647e9b5de5281d6622f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= Date: Wed, 8 Feb 2012 11:49:24 +0100 Subject: Cache textures by checksum --- src/filecache.h | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 src/filecache.h (limited to 'src/filecache.h') diff --git a/src/filecache.h b/src/filecache.h new file mode 100644 index 000000000..35ae9aa7d --- /dev/null +++ b/src/filecache.h @@ -0,0 +1,79 @@ +/* +Minetest-c55 +Copyright (C) 2010 celeron55, Perttu Ahola +Copyright (C) 2012 Jonathan Neuschäfer + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 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 General Public License for more details. + +You should have received a copy of the GNU 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. +*/ + +#ifndef FILECACHE_HEADER +#define FILECACHE_HEADER + +#include +#include + +class FileCache +{ +public: + /* + 'dir' is the file cache directory to use. + */ + FileCache(std::string dir): + m_dir(dir) + { + } + + /* + Searches the cache for a file with a given name. + If the file is found, lookup copies it into 'os' and + returns true. Otherwise false is returned. + */ + bool loadByName(const std::string &name, std::ostream &os); + + /* + Stores a file in the cache based on its name. + Returns true on success, false otherwise. + */ + bool updateByName(const std::string &name, const std::string &data); + + /* + Loads a file based on a check sum, which may be any kind of + rather unique byte sequence. Returns true, if the file could + be written into os, false otherwise. + A file name is required to give the disk file a name that + has the right file name extension (e.g. ".png"). + */ + bool loadByChecksum(const std::string &name, std::ostream &os, + const std::string &checksum); + + /* + Stores a file in the cache based on its checksum. + Returns true on success, false otherwise. + */ + bool updateByChecksum(const std::string &name, const std::string &data, + const std::string &checksum); + +private: + std::string m_dir; + + bool loadByPath(const std::string &name, std::ostream &os, + const std::string &path); + bool updateByPath(const std::string &name, const std::string &data, + const std::string &path); + std::string getPathFromChecksum(const std::string &name, + const std::string &checksum); +}; + +#endif -- cgit v1.2.3