rawdatadat2.cpp

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/***************************************************************************
 *   Copyright (C) 2005-2019 by the FIFE team                              *
 *   http://www.fifengine.net                                              *
 *   This file is part of FIFE.                                            *
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 *   FIFE is free software; you can redistribute it and/or                 *
 *   modify it under the terms of the GNU Lesser General Public            *
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 *   Lesser General Public License for more details.                       *
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// Standard C++ library includes
#include <algorithm>
#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/vfs.h"
#include "util/base/exception.h"

#include "rawdatadat2.h"

namespace FIFE {

    RawDataDAT2::RawDataDAT2(VFS* vfs, const std::string& datfile, const s_info& info) :
        RawDataMemSource(info.unpackedLength) {

        std::unique_ptr<RawData> input (vfs->open(datfile));
        input->setIndex(info.offset);

        if (info.type == 1) { // compressed
            std::unique_ptr<uint8_t[]> compressed(new uint8_t[info.packedLength]);
            input->readInto(compressed.get(), info.packedLength);

            uLongf dstlen = info.unpackedLength;
            if (uncompress(getRawData(), &dstlen, compressed.get(), info.packedLength) != Z_OK || dstlen != info.unpackedLength) {
                throw InvalidFormat("failed to decompress " + info.name + " (inside: " + datfile + ")");
            }
        } else {
            input->readInto(getRawData(), info.unpackedLength);
        }
    }

}