forked from Mirrorlandia_minetest/minetest
118 lines
3.0 KiB
C++
118 lines
3.0 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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#include "filecache.h"
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#include "clientserver.h"
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#include "log.h"
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#include "filesys.h"
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#include "utility.h"
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#include "hex.h"
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#include <string>
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#include <iostream>
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bool FileCache::loadByPath(const std::string &name, std::ostream &os,
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const std::string &path)
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{
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std::ifstream fis(path.c_str(), std::ios_base::binary);
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if(!fis.good()){
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infostream<<"FileCache: File not found in cache: "
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<<name << " expected it at: "<<path<<std::endl;
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return false;
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}
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bool bad = false;
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for(;;){
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char buf[1024];
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fis.read(buf, 1024);
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std::streamsize len = fis.gcount();
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os.write(buf, len);
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if(fis.eof())
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break;
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if(!fis.good()){
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bad = true;
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break;
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}
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}
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if(bad){
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infostream<<"FileCache: Failed to read file from cache: \""
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<<path<<"\""<<std::endl;
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}
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return !bad;
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}
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bool FileCache::updateByPath(const std::string &name, const std::string &data,
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const std::string &path)
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{
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std::ofstream file(path.c_str(), std::ios_base::binary |
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std::ios_base::trunc);
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if(!file.good())
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{
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errorstream<<"FileCache: Can't write to file at "
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<<path<<std::endl;
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return false;
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}
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file.write(data.c_str(), data.length());
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file.close();
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return !file.fail();
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}
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bool FileCache::loadByName(const std::string &name, std::ostream &os)
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{
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std::string path = m_dir + DIR_DELIM + name;
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return loadByPath(name, os, path);
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}
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bool FileCache::updateByName(const std::string &name, const std::string &data)
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{
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std::string path = m_dir + DIR_DELIM + name;
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return updateByPath(name, data, path);
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}
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std::string FileCache::getPathFromChecksum(const std::string &name,
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const std::string &checksum)
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{
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std::string checksum_hex = hex_encode(checksum.c_str(), checksum.length());
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size_t dot = name.find_last_of('.');;
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std::string ext = (dot == std::string::npos)? "" :
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name.substr(dot, std::string::npos);
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return m_dir + DIR_DELIM + checksum_hex + ext;
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}
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bool FileCache::loadByChecksum(const std::string &name, std::ostream &os,
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const std::string &checksum)
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{
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std::string path = getPathFromChecksum(name, checksum);
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return loadByPath(name, os, path);
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}
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bool FileCache::updateByChecksum(const std::string &name,
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const std::string &data, const std::string &checksum)
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{
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std::string path = getPathFromChecksum(name, checksum);
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return updateByPath(name, data, path);
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}
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