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134 lines
3.4 KiB
C++
134 lines
3.4 KiB
C++
/*
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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.h) 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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*/
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#ifndef _BSA_FILE_H_
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#define _BSA_FILE_H_
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#include <libs/mangle/stream/stream.hpp>
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#include <libs/platform/stdint.h>
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#include <libs/platform/strings.h>
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#include <string>
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#include <vector>
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#include <map>
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/**
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This class is used to read "Bethesda Archive Files", or BSAs.
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*/
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class BSAFile
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{
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public:
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/// Represents one file entry in the archive
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struct FileStruct
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{
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// File size and offset in file. We store the offset from the
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// beginning of the file, not the offset into the data buffer
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// (which is what is stored in the archive.)
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uint32_t fileSize, offset;
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// Zero-terminated file name
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char* name;
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};
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typedef std::vector<FileStruct> FileList;
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private:
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/// The archive source
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Mangle::Stream::StreamPtr input;
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/// Table of files in this archive
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FileList files;
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/// Filename string buffer
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std::vector<char> stringBuf;
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/// True when an archive has been loaded
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bool isLoaded;
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/// Used for error messages
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std::string filename;
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/// Case insensitive string comparison
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struct iltstr
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{
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bool operator()(const char *s1, const char *s2) const
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{ return strcasecmp(s1,s2) < 0; }
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};
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/** A map used for fast file name lookup. The value is the index into
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the files[] vector above. The iltstr ensures that file name
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checks are case insensitive.
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*/
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typedef std::map<const char*, int, iltstr> Lookup;
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Lookup lookup;
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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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/// Get the index of a given file name, or -1 if not found
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int getIndex(const char *str);
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public:
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/* -----------------------------------
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* BSA management methods
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* -----------------------------------
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*/
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BSAFile()
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: input(), isLoaded(false) {}
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/// Open an archive file.
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void open(const std::string &file);
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/** Open an archive from a generic stream. The 'name' parameter is
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used for error messages.
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*/
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void open(Mangle::Stream::StreamPtr inp, const std::string &name);
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/* -----------------------------------
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* Archive file routines
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* -----------------------------------
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*/
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/// Check if a file exists
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bool exists(const char *file) { return getIndex(file) != -1; }
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/** Open a file contained in the archive. Throws an exception if the
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file doesn't exist.
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NOTE: All files opened from one archive will share a common file
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handle. This is NOT thread safe.
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*/
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Mangle::Stream::StreamPtr getFile(const char *file);
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/// Get a list of all files
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const FileList &getList() const
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{ return files; }
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};
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#endif
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