components/bsa/bsa_file.hpp

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/*
  OpenMW - The completely unofficial reimplementation of Morrowind
  Copyright (C) 2008-2010  Nicolay Korslund
  Email: < korslund@gmail.com >
  WWW: http://openmw.sourceforge.net/

  This file (bsa_file.h) is part of the OpenMW package.

  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/ .

 */

#ifndef BSA_BSA_FILE_H
#define BSA_BSA_FILE_H

#include <libs/platform/stdint.h>
#include <libs/platform/strings.h>
#include <string>
#include <vector>
#include <map>

#include <OgreDataStream.h>


namespace Bsa
{

class BSAFile
{
public:
    struct FileStruct
    {
        // File size and offset in file. We store the offset from the
        // beginning of the file, not the offset into the data buffer
        // (which is what is stored in the archive.)
        uint32_t fileSize, offset;

        // Zero-terminated file name
        const char *name;
    };
    typedef std::vector<FileStruct> FileList;

private:
    FileList files;

    std::vector<char> stringBuf;

    bool isLoaded;

    std::string filename;

    struct iltstr
    {
        bool operator()(const char *s1, const char *s2) const
        { return strcasecmp(s1,s2) < 0; }
    };

    typedef std::map<const char*, int, iltstr> Lookup;
    Lookup lookup;

    void fail(const std::string &msg);

    void readHeader();

    int getIndex(const char *str) const;

public:
    /* -----------------------------------
     * BSA management methods
     * -----------------------------------
     */

    BSAFile()
      : isLoaded(false)
    { }

    void open(const std::string &file);

    /* -----------------------------------
     * Archive file routines
     * -----------------------------------
     */

    bool exists(const char *file) const
    { return getIndex(file) != -1; }

    Ogre::DataStreamPtr getFile(const char *file);

    const FileList &getList() const
    { return files; }
};

}

#endif