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/***************************************************************************
* Copyright (C) 2005-2019 by the FIFE team *
* http://www.fifengine.net *
* This file is part of FIFE. *
* *
* FIFE is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
// Standard C++ library includes
#include <algorithm>
#include <list>
#include <memory>
// 3rd party library includes
#include "zlib.h"
// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "vfs/raw/rawdata.h"
#include "vfs/fife_boost_filesystem.h"
#include "util/base/exception.h"
#include "util/log/logger.h"
#include "zipsource.h"
#include "zipfilesource.h"
#include "zipnode.h"
namespace FIFE {
static const uint32_t LF_HEADER = 0x04034b50;
static const uint32_t DE_HEADER = 0x08064b50;
static const uint32_t CF_HEADER = 0x02014b50;
static Logger _log(LM_LOADERS);
ZipSource::ZipSource(VFS* vfs, const std::string& zip_file) : VFSSource(vfs), m_zipfile(vfs->open(zip_file)) {
readIndex();
}
ZipSource::~ZipSource() {
delete m_zipfile;
}
bool ZipSource::fileExists(const std::string& file) const {
bfs::path path(file);
return (m_zipTree.getNode(path.string()) != 0);
}
RawData* ZipSource::open(const std::string& path) const {
bfs::path filePath(path);
ZipNode* node = m_zipTree.getNode(filePath.string());
assert(node != 0);
if (node) {
const ZipEntryData& entryData = node->getZipEntryData();
m_zipfile->setIndex(entryData.offset);
uint8_t* data = new uint8_t[entryData.size_real]; // beware of me - one day i WILL cause memory leaks
if (entryData.comp == 8) { // compressed using deflate
FL_DBG(_log, LMsg("trying to uncompress file ") << path << " (compressed with method " << entryData.comp << ")");
std::unique_ptr<uint8_t[]> compdata(new uint8_t[entryData.size_comp]);
m_zipfile->readInto(compdata.get(), entryData.size_comp);
z_stream zstream;
zstream.next_in = compdata.get();
zstream.avail_in = entryData.size_comp;
zstream.zalloc = Z_NULL;
zstream.zfree = Z_NULL;
zstream.opaque = Z_NULL;
zstream.next_out = data;
zstream.avail_out = entryData.size_real;
if (inflateInit2(&zstream, -15) != Z_OK) {
FL_ERR(_log, LMsg("inflateInit2 failed"));
delete[] data;
return 0;
}
int32_t err = inflate(&zstream, Z_FINISH);
if (err != Z_STREAM_END) {
if (zstream.msg) {
FL_ERR(_log, LMsg("inflate failed: ") << zstream.msg);
} else {
FL_ERR(_log, LMsg("inflate failed without msg, err: ") << err);
}
inflateEnd(&zstream);
delete[] data;
return 0;
}
inflateEnd(&zstream);
} else if (entryData.comp == 0) { // uncompressed
m_zipfile->readInto(data, entryData.size_real);
} else {
FL_ERR(_log, LMsg("unsupported compression"));
delete[] data;
return 0;
}
return new RawData(new ZipFileSource(data, entryData.size_real));
}
return 0;
}
void ZipSource::readIndex() {
m_zipfile->setIndex(0);
while (!readFileToIndex()) {}
}
bool ZipSource::readFileToIndex() {
uint32_t header = m_zipfile->read32Little();
if (header == DE_HEADER || header == CF_HEADER) { // decryption header or central directory header - we are finished
return true;
}
uint16_t vneeded = m_zipfile->read16Little();
uint16_t gflags = m_zipfile->read16Little();
uint16_t comp = m_zipfile->read16Little();
uint16_t lmodtime = m_zipfile->read16Little();
uint16_t lmoddate = m_zipfile->read16Little();
uint32_t crc = m_zipfile->read32Little();
uint32_t compsize = m_zipfile->read32Little();
uint32_t realsize = m_zipfile->read32Little();
uint16_t fnamelen = m_zipfile->read16Little();
uint16_t extralen = m_zipfile->read16Little();
if (header != LF_HEADER) {
FL_ERR(_log, LMsg("invalid local file header: ") << header);
return true;
}
if (vneeded > 20) {
FL_ERR(_log, LMsg("only zip version 2 is supported, required: ") << vneeded);
return true;
}
bfs::path filePath = bfs::path(m_zipfile->readString(fnamelen));
m_zipfile->moveIndex(extralen);
uint32_t offset = m_zipfile->getCurrentIndex();
FL_DBG(_log, LMsg("found file: ") << filePath.string() << " (" << compsize << "/" << realsize << ") on offset " << offset);
m_zipfile->moveIndex(compsize);
if (gflags & (0x01 << 3)) {
crc = m_zipfile->read32Little();
compsize = m_zipfile->read32Little();
realsize = m_zipfile->read32Little();
}
if (lmodtime || lmoddate) {} // shut up the compiler (warnings of unused variables)
ZipEntryData data;
data.comp = comp;
data.size_real = realsize;
data.size_comp = compsize;
data.offset = offset;
data.crc32 = crc;
std::string filename = filePath.string();
ZipNode* node = m_zipTree.addNode(filename);
if (node) {
// store the zip entry information in the node
node->setZipEntryData(data);
}
return false;
}
std::set<std::string> ZipSource::listFiles(const std::string& path) const {
std::set<std::string> result;
bfs::path fixedPath(path);
ZipNode* node = m_zipTree.getNode(fixedPath.string());
if (node) {
ZipNodeContainer files = node->getChildren(ZipContentType::File);
ZipNodeContainer::iterator iter;
for (iter = files.begin(); iter != files.end(); ++iter) {
result.insert((*iter)->getFullName());
}
}
return result;
}
// FIXME: quick&very dirty..
std::set<std::string> ZipSource::listDirectories(const std::string& path) const {
std::set<std::string> result;
bfs::path fixedPath(path);
ZipNode* node = m_zipTree.getNode(fixedPath.string());
if (node) {
ZipNodeContainer files = node->getChildren(ZipContentType::Directory);
ZipNodeContainer::iterator iter;
for (iter = files.begin(); iter != files.end(); ++iter) {
result.insert((*iter)->getFullName());
}
}
return result;
}
}
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