BSA enhancements.
* Implement hash based lookup for TES3 BSA files. * Added TES4/TES5 BSA support. * Implemented a hack (non-portable code) in an attempt to reduce startup time under Windows because Boost::filesystem seems to take forever on GetFileAttributeW. This implementation uses FindFirstFile/FindNextFile/FindClose instead.pull/541/head
cc9cii
6 years ago
parent
4cd4cf8479
commit
3982573035
@ -0,0 +1,339 @@
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/*
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OpenMW - The completely unofficial reimplementation of Morrowind
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Copyright (C) 2008-2010 Nicolay Korslund
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Email: < korslund@gmail.com >
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WWW: http://openmw.sourceforge.net/
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This file (bsa_file.cpp) is part of the OpenMW package.
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OpenMW is distributed as free software: you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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version 3, as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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version 3 along with this program. If not, see
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http://www.gnu.org/licenses/ .
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TES4 stuff added by cc9cii 2018
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*/
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#include "tes4bsa_file.hpp"
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#include <stdexcept>
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#include <cassert>
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#include <boost/scoped_array.hpp>
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#include <boost/algorithm/string.hpp>
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#include <boost/filesystem/path.hpp>
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#include <boost/filesystem/fstream.hpp>
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#include <zlib.h>
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#include <extern/BSAOpt/hash.hpp> // see: http://en.uesp.net/wiki/Tes4Mod:Hash_Calculation
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#undef TEST_UNIQUE_HASH
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namespace
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{
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void getBZString(std::string& str, boost::filesystem::ifstream& filestream)
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{
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char size = 0;
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filestream.read(&size, 1);
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boost::scoped_array<char> buf(new char[size]);
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filestream.read(buf.get(), size);
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if (buf[size - 1] != 0)
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str.assign(buf.get(), size);
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else
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str.assign(buf.get(), size - 1); // don't copy null terminator
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assert((size_t)size-1 == str.size() && "getBZString string size mismatch");
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return;
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}
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}
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using namespace Bsa;
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/// Error handling
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void TES4BSAFile::fail(const std::string& msg)
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{
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throw std::runtime_error("BSA Error: " + msg + "\nArchive: " + mFilename);
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}
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/// Read header information from the input source
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void TES4BSAFile::readHeader()
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{
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assert(!isLoaded);
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namespace bfs = boost::filesystem;
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bfs::ifstream input(bfs::path(mFilename), std::ios_base::binary);
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// Total archive size
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std::streamoff fsize = 0;
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if(input.seekg(0, std::ios_base::end))
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{
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fsize = input.tellg();
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input.seekg(0);
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}
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if(fsize < 36) // header is 36 bytes
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fail("File too small to be a valid BSA archive");
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// Get essential header numbers
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//size_t dirsize, filenum;
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std::uint32_t archiveFlags, folderCount, fileCount, totalFileNameLength;
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{
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// First 36 bytes
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std::uint32_t header[9];
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input.read(reinterpret_cast<char*>(header), 36);
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if(header[0] != 0x00415342 /*"BSA\x00"*/ || (header[1] != 0x67 /*TES4*/ && header[1] != 0x68 /*TES5*/))
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fail("Unrecognized TES4 BSA header");
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// header[2] is offset, should be 36 = 0x24 which is the size of the header
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// Oblivion - Meshes.bsa
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//
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// 0111 1000 0111 = 0x0787
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// ^^^ ^ ^^^
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// ||| | ||+-- has names for dirs (mandatory?)
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// ||| | |+--- has names for files (mandatory?)
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// ||| | +---- files are compressed by default
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// ||| |
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// ||| +---------- unknown (TES5: retain strings during startup)
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// ||+------------ unknown (TES5: embedded file names)
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// |+------------- unknown
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// +-------------- unknown
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//
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archiveFlags = header[3];
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folderCount = header[4];
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fileCount = header[5];
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//totalFolderNameLength = header[6];
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totalFileNameLength = header[7];
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//fileFlags = header[8]; // FIXME: an opportunity to optimize here
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mCompressedByDefault = (archiveFlags & 0x4) != 0;
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mEmbeddedFileNames = header[1] == 0x68 /*TES5*/ && (archiveFlags & 0x100) != 0;
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}
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// TODO: more checks for BSA file corruption
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// folder records
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std::uint64_t hash;
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FolderRecord fr;
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for (std::uint32_t i = 0; i < folderCount; ++i)
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{
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input.read(reinterpret_cast<char*>(&hash), 8);
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input.read(reinterpret_cast<char*>(&fr.count), 4); // not sure purpose of count
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input.read(reinterpret_cast<char*>(&fr.offset), 4); // not sure purpose of offset
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std::map<std::uint64_t, FolderRecord>::const_iterator lb = mFolders.lower_bound(hash);
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if (lb != mFolders.end() && !(mFolders.key_comp()(hash, lb->first)))
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fail("Archive found duplicate folder name hash");
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else
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mFolders.insert(lb, std::pair<std::uint64_t, FolderRecord>(hash, fr));
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}
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// file record blocks
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std::uint64_t fileHash;
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FileRecord file;
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std::string folder("");
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std::uint64_t folderHash;
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if ((archiveFlags & 0x1) == 0)
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folderCount = 1; // TODO: not tested
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for (std::uint32_t i = 0; i < folderCount; ++i)
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{
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if ((archiveFlags & 0x1) != 0)
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getBZString(folder, input);
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folderHash = GenOBHash(folder, std::string(""));
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std::map<std::uint64_t, FolderRecord>::iterator iter = mFolders.find(folderHash);
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if (iter == mFolders.end())
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fail("Archive folder name hash not found");
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for (std::uint32_t j = 0; j < iter->second.count; ++j)
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{
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input.read(reinterpret_cast<char*>(&fileHash), 8);
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input.read(reinterpret_cast<char*>(&file.size), 4);
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input.read(reinterpret_cast<char*>(&file.offset), 4);
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std::map<std::uint64_t, FileRecord>::const_iterator lb = iter->second.files.lower_bound(fileHash);
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if (lb != iter->second.files.end() && !(iter->second.files.key_comp()(fileHash, lb->first)))
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fail("Archive found duplicate file name hash");
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iter->second.files.insert(lb, std::pair<std::uint64_t, FileRecord>(fileHash, file));
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}
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}
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// file record blocks
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if ((archiveFlags & 0x2) != 0)
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{
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mStringBuf.resize(totalFileNameLength);
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input.read(&mStringBuf[0], mStringBuf.size()); // TODO: maybe useful in building a lookup map?
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}
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// TODO: more checks for BSA file corruption
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isLoaded = true;
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}
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TES4BSAFile::FileRecord TES4BSAFile::getFileRecord(const std::string& str) const
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{
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boost::filesystem::path p(str);
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std::string stem = p.stem().string();
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std::string ext = p.extension().string();
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std::string filename = p.filename().string();
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p.remove_filename();
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std::string folder = p.string();
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// GenOBHash already converts to lowercase and replaces file separators but not for path
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boost::algorithm::to_lower(folder);
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std::replace(folder.begin(), folder.end(), '/', '\\');
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std::uint64_t folderHash = GenOBHash(folder, std::string(""));
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std::map<std::uint64_t, FolderRecord>::const_iterator it = mFolders.find(folderHash);
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if (it == mFolders.end())
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return FileRecord(); // folder not found, return default which has offset of -1
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boost::algorithm::to_lower(stem);
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boost::algorithm::to_lower(ext);
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std::uint64_t fileHash = GenOBHashPair(stem, ext);
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std::map<std::uint64_t, FileRecord>::const_iterator iter = it->second.files.find(fileHash);
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if (iter == it->second.files.end())
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return FileRecord(); // file not found, return default which has offset of -1
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// cache for next time
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std::uint64_t hash = GenOBHash(folder, filename);
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#if defined (TEST_UNIQUE_HASH)
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FileList::const_iterator lb = mFiles.lower_bound(hash);
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if (lb != mFiles.end() && !(mFiles.key_comp()(hash, lb->first)))
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{
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// found, check if same filename
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if (lb->second.fileName == str)
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return iter->second; // same name, should not have got here!!
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else
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{
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// different filename, hash is not unique!
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std::cerr << "BSA hash collision: " << str << std::hex << "0x" << hash << std::endl;
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return iter->second; // return without cashing
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}
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}
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// not found, cache for later
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const_cast<FileList&>(mFiles).insert(lb, std::pair<std::uint64_t, FileRecord>(hash, iter->second));
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const_cast<FileList&>(mFiles)[hash].fileName = str;
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#else
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const_cast<FileList&>(mFiles)[hash] = iter->second; // NOTE: const hack
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#endif
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return iter->second;
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}
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bool TES4BSAFile::exists(const std::string& str) const
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{
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// check cache first
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boost::filesystem::path p(str);
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std::string filename = p.filename().string();
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p.remove_filename();
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std::string folder = p.string();
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// GenOBHash already converts to lowercase and replaces file separators but not for path
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boost::algorithm::to_lower(folder);
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std::replace(folder.begin(), folder.end(), '/', '\\');
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std::uint64_t hash = GenOBHash(folder, filename);
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std::map<std::uint64_t, FileRecord>::const_iterator it = mFiles.find(hash);
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#if defined (TEST_UNIQUE_HASH)
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if (it != mFiles.end() && it->second.fileName == str)
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#else
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if (it != mFiles.end())
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#endif
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return true;
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else
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return getFileRecord(str).offset != -1;
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}
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void TES4BSAFile::open(const std::string& file)
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{
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mFilename = file;
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readHeader();
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}
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Ogre::DataStreamPtr TES4BSAFile::getFile(const std::string& file)
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{
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assert(file);
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FileRecord fileRec = getFileRecord(file);
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if(fileRec.offset == -1)
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fail("File not found: " + std::string(file));
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boost::filesystem::ifstream input(boost::filesystem::path(mFilename), std::ios_base::binary);
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input.seekg(fileRec.offset);
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std::string fullPath;
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if (mEmbeddedFileNames)
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getBZString(fullPath, input); // TODO: maybe cache the hash and/or offset of frequently used ones?
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if (( mCompressedByDefault && (fileRec.size & (1<<30)) == 0)
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||
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(!mCompressedByDefault && (fileRec.size & (1<<30)) != 0))
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{
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std::uint32_t bufSize = 0;
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boost::scoped_array<unsigned char> inBuf;
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inBuf.reset(new unsigned char[fileRec.size-4]);
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input.read(reinterpret_cast<char*>(&bufSize), 4);
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input.read(reinterpret_cast<char*>(inBuf.get()), fileRec.size-4);
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Ogre::MemoryDataStream *outBuf = new Ogre::MemoryDataStream(bufSize);
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Ogre::SharedPtr<Ogre::DataStream> streamPtr(outBuf);
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int ret;
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z_stream strm;
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strm.zalloc = Z_NULL;
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strm.zfree = Z_NULL;
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strm.opaque = Z_NULL;
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strm.avail_in = bufSize;
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strm.next_in = inBuf.get();
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ret = inflateInit(&strm);
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if (ret != Z_OK)
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throw std::runtime_error("TES4BSAFile::getFile - inflateInit failed");
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strm.avail_out = bufSize;
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strm.next_out = outBuf->getPtr();
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ret = inflate(&strm, Z_NO_FLUSH);
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assert(ret != Z_STREAM_ERROR && "TES4BSAFile::getFile - inflate - state clobbered");
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switch (ret)
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{
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case Z_NEED_DICT:
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ret = Z_DATA_ERROR; /* and fall through */
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case Z_DATA_ERROR:
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case Z_MEM_ERROR:
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inflateEnd(&strm);
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throw std::runtime_error("TES4BSAFile::getFile - inflate failed");
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}
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assert(ret == Z_OK || ret == Z_STREAM_END);
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inflateEnd(&strm);
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return streamPtr;
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}
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else // not compressed TODO: not tested
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{
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Ogre::MemoryDataStream *outBuf = new Ogre::MemoryDataStream(fileRec.size);
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Ogre::SharedPtr<Ogre::DataStream> streamPtr(outBuf);
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input.read(reinterpret_cast<char*>(outBuf->getPtr()), fileRec.size);
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return streamPtr;
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}
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}
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@ -0,0 +1,103 @@
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/*
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OpenMW - The completely unofficial reimplementation of Morrowind
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Copyright (C) 2008-2010 Nicolay Korslund
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Email: < korslund@gmail.com >
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||||
WWW: http://openmw.sourceforge.net/
|
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|
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This file (bsa_file.h) is part of the OpenMW package.
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|
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OpenMW is distributed as free software: you can redistribute it
|
||||
and/or modify it under the terms of the GNU General Public License
|
||||
version 3, as published by the Free Software Foundation.
|
||||
|
||||
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
|
||||
version 3 along with this program. If not, see
|
||||
http://www.gnu.org/licenses/ .
|
||||
|
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TES4 stuff added by cc9cii 2018
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*/
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#ifndef BSA_TES4BSA_FILE_H
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#define BSA_TES4BSA_FILE_H
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include <map>
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#include <OgreDataStream.h>
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namespace Bsa
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{
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class TES4BSAFile
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{
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public:
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struct FileRecord
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{
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std::uint32_t size;
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std::uint32_t offset;
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std::string fileName; // NOTE: for testing hash collision only, see TEST_UNIQUE_HASH
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FileRecord() : size(0), offset(-1) {}
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};
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private:
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/// Filenames string buffer
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std::vector<char> mStringBuf;
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/// True when an archive has been loaded
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bool isLoaded;
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bool mCompressedByDefault;
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bool mEmbeddedFileNames;
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std::map<std::uint64_t, FileRecord> mFiles;
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typedef std::map<std::uint64_t, FileRecord> FileList;
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struct FolderRecord
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{
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std::uint32_t count;
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std::uint32_t offset;
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std::map<std::uint64_t, FileRecord> files;
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};
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std::map<std::uint64_t, FolderRecord> mFolders;
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FileRecord getFileRecord(const std::string& str) const;
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/// Used for error messages and getting files
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std::string mFilename;
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/// Error handling
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void fail(const std::string &msg);
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/// Read header information from the input source
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void readHeader();
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public:
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TES4BSAFile()
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: isLoaded(false), mCompressedByDefault(false), mEmbeddedFileNames(false)
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{ }
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/// Open an archive file.
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void open(const std::string &file);
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/// Check if a file exists
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bool exists(const std::string& file) const;
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Ogre::DataStreamPtr getFile(const std::string& file);
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/// Get a list of all files
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const FileList &getList() const // FIXME
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{ return mFiles; }
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};
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}
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#endif
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@ -0,0 +1,17 @@
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cmake_minimum_required(VERSION 2.8)
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# This is NOT intended as a stand-alone build system! Instead, you should include this from the main CMakeLists of your project.
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|
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set(BSAOPTHASH_LIBRARY "bsaopthash")
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# Sources
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set(SOURCE_FILES
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hash.cpp
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)
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add_library(${BSAOPTHASH_LIBRARY} STATIC ${SOURCE_FILES})
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|
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set(BSAOPTHASH_LIBRARIES ${BSAOPTHASH_LIBRARY})
|
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|
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link_directories(${CMAKE_CURRENT_BINARY_DIR})
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set(BSAOPTHASH_LIBRARIES ${BSAOPTHASH_LIBRARIES} PARENT_SCOPE)
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@ -0,0 +1,108 @@
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/* Version: MPL 1.1/LGPL 3.0
|
||||
*
|
||||
* "The contents of this file are subject to the Mozilla Public License
|
||||
* Version 1.1 (the "License"); you may not use this file except in
|
||||
* compliance with the License. You may obtain a copy of the License at
|
||||
* http://www.mozilla.org/MPL/
|
||||
*
|
||||
* Software distributed under the License is distributed on an "AS IS"
|
||||
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
|
||||
* License for the specific language governing rights and limitations
|
||||
* under the License.
|
||||
*
|
||||
* The Original Code is BSAopt.
|
||||
*
|
||||
* The Initial Developer of the Original Code is
|
||||
* Ethatron <niels@paradice-insight.us>. Portions created by The Initial
|
||||
* Developer are Copyright (C) 2011 The Initial Developer.
|
||||
* All Rights Reserved.
|
||||
*
|
||||
* Alternatively, the contents of this file may be used under the terms
|
||||
* of the GNU Library General Public License Version 3 license (the
|
||||
* "LGPL License"), in which case the provisions of LGPL License are
|
||||
* applicable instead of those above. If you wish to allow use of your
|
||||
* version of this file only under the terms of the LGPL License and not
|
||||
* to allow others to use your version of this file under the MPL,
|
||||
* indicate your decision by deleting the provisions above and replace
|
||||
* them with the notice and other provisions required by the LGPL License.
|
||||
* If you do not delete the provisions above, a recipient may use your
|
||||
* version of this file under either the MPL or the LGPL License."
|
||||
*/
|
||||
|
||||
#include <cstdint>
|
||||
#include <algorithm>
|
||||
|
||||
#include "hash.hpp"
|
||||
|
||||
std::uint32_t GenOBHashStr(const std::string& s) {
|
||||
std::uint32_t hash = 0;
|
||||
|
||||
for (std::size_t i = 0; i < s.length(); i++) {
|
||||
hash *= 0x1003F;
|
||||
hash += (unsigned char)s[i];
|
||||
}
|
||||
|
||||
return hash;
|
||||
}
|
||||
|
||||
std::uint64_t GenOBHashPair(const std::string& fle, const std::string& ext) {
|
||||
std::uint64_t hash = 0;
|
||||
|
||||
if (fle.length() > 0) {
|
||||
hash = (std::uint64_t)(
|
||||
(((unsigned char)fle[fle.length() - 1]) * 0x1) +
|
||||
((fle.length() > 2 ? (unsigned char)fle[fle.length() - 2] : (unsigned char)0) * 0x100) +
|
||||
(fle.length() * 0x10000) +
|
||||
(((unsigned char)fle[0]) * 0x1000000)
|
||||
);
|
||||
|
||||
if (fle.length() > 3) {
|
||||
hash += (std::uint64_t)(GenOBHashStr(fle.substr(1, fle.length() - 3)) * 0x100000000);
|
||||
}
|
||||
}
|
||||
|
||||
if (ext.length() > 0) {
|
||||
hash += (std::uint64_t)(GenOBHashStr(ext) * 0x100000000LL);
|
||||
|
||||
unsigned char i = 0;
|
||||
if (ext == ".nif") i = 1;
|
||||
if (ext == ".kf" ) i = 2;
|
||||
if (ext == ".dds") i = 3;
|
||||
if (ext == ".wav") i = 4;
|
||||
|
||||
if (i != 0) {
|
||||
unsigned char a = (unsigned char)(((i & 0xfc ) << 5) + (unsigned char)((hash & 0xff000000) >> 24));
|
||||
unsigned char b = (unsigned char)(((i & 0xfe ) << 6) + (unsigned char)( hash & 0x000000ff) );
|
||||
unsigned char c = (unsigned char)(( i << 7) + (unsigned char)((hash & 0x0000ff00) >> 8));
|
||||
|
||||
hash -= hash & 0xFF00FFFF;
|
||||
hash += (std::uint32_t)((a << 24) + b + (c << 8));
|
||||
}
|
||||
}
|
||||
|
||||
return hash;
|
||||
}
|
||||
|
||||
std::uint64_t GenOBHash(const std::string& path, std::string& file) {
|
||||
std::transform(file.begin(), file.end(), file.begin(), ::tolower);
|
||||
std::replace(file.begin(), file.end(), '/', '\\');
|
||||
|
||||
std::string fle;
|
||||
std::string ext;
|
||||
|
||||
const char *_fle = file.data();
|
||||
const char *_ext = strrchr(_fle, '.');
|
||||
if (_ext) {
|
||||
ext = file.substr((0 + _ext) - _fle);
|
||||
fle = file.substr(0, ( _ext) - _fle);
|
||||
}
|
||||
else {
|
||||
ext = "";
|
||||
fle = file;
|
||||
}
|
||||
|
||||
if (path.length() && fle.length())
|
||||
return GenOBHashPair(path + "\\" + fle, ext);
|
||||
else
|
||||
return GenOBHashPair(path + fle, ext);
|
||||
}
|
||||
@ -0,0 +1,42 @@
|
||||
/* Version: MPL 1.1/LGPL 3.0
|
||||
*
|
||||
* "The contents of this file are subject to the Mozilla Public License
|
||||
* Version 1.1 (the "License"); you may not use this file except in
|
||||
* compliance with the License. You may obtain a copy of the License at
|
||||
* http://www.mozilla.org/MPL/
|
||||
*
|
||||
* Software distributed under the License is distributed on an "AS IS"
|
||||
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
|
||||
* License for the specific language governing rights and limitations
|
||||
* under the License.
|
||||
*
|
||||
* The Original Code is BSAopt.
|
||||
*
|
||||
* The Initial Developer of the Original Code is
|
||||
* Ethatron <niels@paradice-insight.us>. Portions created by The Initial
|
||||
* Developer are Copyright (C) 2011 The Initial Developer.
|
||||
* All Rights Reserved.
|
||||
*
|
||||
* Alternatively, the contents of this file may be used under the terms
|
||||
* of the GNU Library General Public License Version 3 license (the
|
||||
* "LGPL License"), in which case the provisions of LGPL License are
|
||||
* applicable instead of those above. If you wish to allow use of your
|
||||
* version of this file only under the terms of the LGPL License and not
|
||||
* to allow others to use your version of this file under the MPL,
|
||||
* indicate your decision by deleting the provisions above and replace
|
||||
* them with the notice and other provisions required by the LGPL License.
|
||||
* If you do not delete the provisions above, a recipient may use your
|
||||
* version of this file under either the MPL or the LGPL License."
|
||||
*/
|
||||
#ifndef BSAOPT_HASH_H
|
||||
#define BSAOPT_HASH_H
|
||||
|
||||
#include <string>
|
||||
|
||||
std::uint32_t GenOBHashStr(const std::string& s);
|
||||
|
||||
std::uint64_t GenOBHashPair(const std::string& fle, const std::string& ext);
|
||||
|
||||
std::uint64_t GenOBHash(const std::string& path, std::string& file);
|
||||
|
||||
#endif // BSAOPT_HASH_H
|
||||
Loading…
Reference in New Issue