C++ FileStreamPtr::cache方法代码示例

void ThingTypeManager::saveDat(std::string fileName)
{
    if(!m_datLoaded)
        stdext::throw_exception("failed to save, dat is not loaded");

    try {
        FileStreamPtr fin = g_resources.createFile(fileName);
        if(!fin)
            stdext::throw_exception(stdext::format("failed to open file '%s' for write", fileName));

        fin->cache();

        fin->addU32(m_datSignature);

        for(int category = 0; category < ThingLastCategory; ++category)
            fin->addU16(m_thingTypes[category].size() - 1);

        for(int category = 0; category < ThingLastCategory; ++category) {
            uint16 firstId = 1;
            if(category == ThingCategoryItem)
                firstId = 100;

            for(uint16 id = firstId; id < m_thingTypes[category].size(); ++id)
                m_thingTypes[category][id]->serialize(fin);
        }


        fin->flush();
        fin->close();
    } catch(std::exception& e) {
        g_logger.error(stdext::format("Failed to save '%s': %s", fileName, e.what()));
    }
}

SoundFilePtr SoundFile::loadSoundFile(const std::string& filename)
{
    FileStreamPtr file = g_resources.openFile(filename);
    if(!file) {
        logTraceError("unable to open ", filename);
        return nullptr;
    }

    // cache file buffer to avoid lags from hard drive
    file->cache();

    char magic[4];
    file->read(magic, 4);
    file->seek(0);

    SoundFilePtr soundFile;
    if(strncmp(magic, "OggS", 4) == 0) {
        OggSoundFilePtr oggSoundFile = OggSoundFilePtr(new OggSoundFile(file));
        if(oggSoundFile->prepareOgg())
            soundFile = oggSoundFile;
    } else
        logError("unknown sound file format ", filename);

    return soundFile;
}

void SpriteManager::saveSpr(std::string fileName)
{
    if(!m_loaded)
        stdext::throw_exception("failed to save, spr is not loaded");

    try {
        FileStreamPtr fin = g_resources.createFile(fileName);
        if(!fin)
            stdext::throw_exception(stdext::format("failed to open file '%s' for write", fileName));

        fin->cache();

        fin->addU32(m_signature);
        if(g_game.getFeature(Otc::GameSpritesU32))
            fin->addU32(m_spritesCount);
        else
            fin->addU16(m_spritesCount);

        uint32 offset = fin->tell();
        uint32 spriteAddress = offset + 4 * m_spritesCount;
        for(int i = 1; i <= m_spritesCount; i++)
            fin->addU32(0);

        for(int i = 1; i <= m_spritesCount; i++) {
            m_spritesFile->seek((i - 1) * 4 + m_spritesOffset);
            uint32 fromAdress = m_spritesFile->getU32();
            if(fromAdress != 0) {
                fin->seek(offset + (i - 1) * 4);
                fin->addU32(spriteAddress);
                fin->seek(spriteAddress);

                m_spritesFile->seek(fromAdress);
                fin->addU8(m_spritesFile->getU8());
                fin->addU8(m_spritesFile->getU8());
                fin->addU8(m_spritesFile->getU8());

                uint16 dataSize = m_spritesFile->getU16();
                fin->addU16(dataSize);
                char spriteData[SPRITE_DATA_SIZE];
                m_spritesFile->read(spriteData, dataSize);
                fin->write(spriteData, dataSize);

                spriteAddress = fin->tell();
            }
            //TODO: Check for overwritten sprites.
        }

        fin->flush();
        fin->close();
    } catch(std::exception& e) {
        g_logger.error(stdext::format("Failed to save '%s': %s", fileName, e.what()));
    }
}

void Image::savePNG(const std::string& fileName)
{
    FileStreamPtr fin = g_resources.createFile(fileName);
    if(!fin)
        stdext::throw_exception(stdext::format("failed to open file '%s' for write", fileName));

    fin->cache();
    std::stringstream data;
    save_png(data, m_size.width(), m_size.height(), 4, (unsigned char*)getPixelData());
    fin->write(data.str().c_str(), data.str().length());
    fin->flush();
    fin->close();
}

void Map::saveOtcm(const std::string& fileName)
{
#if 0
    try {
        g_clock.update();

        FileStreamPtr fin = g_resources.createFile(fileName);
        fin->cache();

        //TODO: compression flag with zlib
        uint32 flags = 0;

        // header
        fin->addU32(OTCM_SIGNATURE);
        fin->addU16(0); // data start, will be overwritten later
        fin->addU16(OTCM_VERSION);
        fin->addU32(flags);

        // version 1 header
        fin->addString("OTCM 1.0"); // map description
        fin->addU32(g_things.getDatSignature());
        fin->addU16(g_game.getClientVersion());
        fin->addString(g_game.getWorldName());

        // go back and rewrite where the map data starts
        uint32 start = fin->tell();
        fin->seek(4);
        fin->addU16(start);
        fin->seek(start);

        for(auto& pair : m_tiles) {
            const TilePtr& tile = pair.second;
            if(!tile || tile->isEmpty())
                continue;

            Position pos = pair.first;
            fin->addU16(pos.x);
            fin->addU16(pos.y);
            fin->addU8(pos.z);

            const auto& list = tile->getThings();
            auto first = std::find_if(list.begin(), list.end(), [](const ThingPtr& thing) { return thing->isItem(); });
            for(auto it = first, end = list.end(); it != end; ++it) {
                const ThingPtr& thing = *it;
                if(thing->isItem()) {
                    ItemPtr item = thing->static_self_cast<Item>();
                    fin->addU16(item->getId());
                    fin->addU8(item->getCountOrSubType());
                }
            }

            // end of tile
            fin->addU16(0xFFFF);
        }

        // end of file
        Position invalidPos;
        fin->addU16(invalidPos.x);
        fin->addU16(invalidPos.y);
        fin->addU8(invalidPos.z);

        fin->flush();
        fin->close();
    } catch(stdext::exception& e) {
        g_logger.error(stdext::format("failed to save OTCM map: %s", e.what()));
    }
#endif
}

bool Map::loadOtcm(const std::string& fileName)
{
    try {
        FileStreamPtr fin = g_resources.openFile(fileName);
        if(!fin)
            stdext::throw_exception("unable to open file");

        stdext::timer loadTimer;
        fin->cache();

        uint32 signature = fin->getU32();
        if(signature != OTCM_SIGNATURE)
            stdext::throw_exception("invalid otcm file");

        uint16 start = fin->getU16();
        uint16 version = fin->getU16();
        fin->getU32(); // flags

        switch(version) {
            case 1: {
                fin->getString(); // description
                uint32 datSignature = fin->getU32();
                fin->getU16(); // protocol version
                fin->getString(); // world name

                if(datSignature != g_things.getDatSignature())
                    g_logger.warning("otcm map loaded was created with a different dat signature");

                break;
            }
            default:
                stdext::throw_exception("otcm version not supported");
        }

        fin->seek(start);

        while(true) {
            Position pos;

            pos.x = fin->getU16();
            pos.y = fin->getU16();
            pos.z = fin->getU8();

            // end of file
            if(!pos.isValid())
                break;

            const TilePtr& tile = g_map.createTile(pos);

            int stackPos = 0;
            while(true) {
                int id = fin->getU16();

                // end of tile
                if(id == 0xFFFF)
                    break;

                int countOrSubType = fin->getU8();

                ItemPtr item = Item::create(id);
                item->setCountOrSubType(countOrSubType);

                if(item->isValid())
                    tile->addThing(item, stackPos++);
            }
        }

        fin->close();

        g_logger.debug(stdext::format("Otcm load time: %.2f seconds", loadTimer.elapsed_seconds()));
        return true;
    } catch(stdext::exception& e) {
        g_logger.error(stdext::format("failed to load OTCM map: %s", e.what()));
        return false;
    }
}

void Map::loadOtbm(const std::string& fileName)
{
    FileStreamPtr fin = g_resources.openFile(fileName);
    if(!fin)
        stdext::throw_exception(stdext::format("Unable to load map '%s'", fileName));

    fin->cache();
    if(!g_things.isOtbLoaded())
        stdext::throw_exception("OTB isn't loaded yet to load a map.");

    if(fin->getU32())
        stdext::throw_exception("Unknown file version detected");

    BinaryTreePtr root = fin->getBinaryTree();
    if(root->getU8())
        stdext::throw_exception("could not read root property!");

    uint32 headerVersion = root->getU32();
    if(!headerVersion || headerVersion > 3)
        stdext::throw_exception(stdext::format("Unknown OTBM version detected: %u.", headerVersion));

    setWidth(root->getU16());
    setHeight(root->getU16());

    uint32 headerMajorItems = root->getU8();
    if(headerMajorItems < 3) {
        stdext::throw_exception(stdext::format("This map needs to be upgraded. read %d what it's supposed to be: %u",
                                               headerMajorItems, g_things.getOtbMajorVersion()));
    }

    if(headerMajorItems > g_things.getOtbMajorVersion()) {
        stdext::throw_exception(stdext::format("This map was saved with different OTB version. read %d what it's supposed to be: %d",
                                               headerMajorItems, g_things.getOtbMajorVersion()));
    }

    root->skip(3);
    uint32 headerMinorItems =  root->getU32();
    if(headerMinorItems > g_things.getOtbMinorVersion()) {
        g_logger.warning(stdext::format("This map needs an updated OTB. read %d what it's supposed to be: %d or less",
                                        headerMinorItems, g_things.getOtbMinorVersion()));
    }

    BinaryTreePtr node = root->getChildren()[0];
    if(node->getU8() != OTBM_MAP_DATA)
        stdext::throw_exception("Could not read root data node");

    while (node->canRead()) {
        uint8 attribute = node->getU8();
        std::string tmp = node->getString();
        switch (attribute) {
        case OTBM_ATTR_DESCRIPTION:
            setDescription(tmp);
            break;
        case OTBM_ATTR_SPAWN_FILE:
            setSpawnFile(fileName.substr(0, fileName.rfind('/') + 1) + tmp);
            break;
        case OTBM_ATTR_HOUSE_FILE:
            setHouseFile(fileName.substr(0, fileName.rfind('/') + 1) + tmp);
            break;
        default:
            stdext::throw_exception(stdext::format("Invalid attribute '%d'", (int)attribute));
        }
    }

    for(const BinaryTreePtr &nodeMapData : node->getChildren()) {
        uint8 mapDataType = nodeMapData->getU8();
        if(mapDataType == OTBM_TILE_AREA) {
            Position basePos = nodeMapData->getPosition();

            for(const BinaryTreePtr &nodeTile : nodeMapData->getChildren()) {
                uint8 type = nodeTile->getU8();
                if(type != OTBM_TILE && type != OTBM_HOUSETILE)
                    stdext::throw_exception(stdext::format("invalid node tile type %d", (int)type));

                HousePtr house = nullptr;
                uint32 flags = TILESTATE_NONE;
                Position pos = basePos + nodeTile->getPoint();

                if(type ==  OTBM_HOUSETILE) {
                    uint32 hId = nodeTile->getU32();
                    TilePtr tile = getOrCreateTile(pos);
                    if(!(house = m_houses.getHouse(hId))) {
                        house = HousePtr(new House(hId));
                        m_houses.addHouse(house);
                    }
                    house->setTile(tile);
                }

                while(nodeTile->canRead()) {
                    uint8 tileAttr = nodeTile->getU8();
                    switch (tileAttr) {
                        case OTBM_ATTR_TILE_FLAGS: {
                            uint32 _flags = nodeTile->getU32();
                            if((_flags & TILESTATE_PROTECTIONZONE) == TILESTATE_PROTECTIONZONE)
                                flags |= TILESTATE_PROTECTIONZONE;
                            else if((_flags & TILESTATE_OPTIONALZONE) == TILESTATE_OPTIONALZONE)
                                flags |= TILESTATE_OPTIONALZONE;
                            else if((_flags & TILESTATE_HARDCOREZONE) == TILESTATE_HARDCOREZONE)
                                flags |= TILESTATE_HARDCOREZONE;

//.........这里部分代码省略.........

void Map::saveOtcm(const std::string& fileName)
{
    try {
        stdext::timer saveTimer;

        FileStreamPtr fin = g_resources.createFile(fileName);
        fin->cache();

        //TODO: compression flag with zlib
        uint32 flags = 0;

        // header
        fin->addU32(OTCM_SIGNATURE);
        fin->addU16(0); // data start, will be overwritten later
        fin->addU16(OTCM_VERSION);
        fin->addU32(flags);

        // version 1 header
        fin->addString("OTCM 1.0"); // map description
        fin->addU32(g_things.getDatSignature());
        fin->addU16(g_game.getProtocolVersion());
        fin->addString(g_game.getWorldName());

        // go back and rewrite where the map data starts
        uint32 start = fin->tell();
        fin->seek(4);
        fin->addU16(start);
        fin->seek(start);

        for(uint8_t z = 0; z <= Otc::MAX_Z; ++z) {
            for(const auto& it : m_tileBlocks[z]) {
                const TileBlock& block = it.second;
                for(const TilePtr& tile : block.getTiles()) {
                    if(!tile || tile->isEmpty())
                        continue;

                    Position pos = tile->getPosition();
                    fin->addU16(pos.x);
                    fin->addU16(pos.y);
                    fin->addU8(pos.z);

                    for(const ThingPtr& thing : tile->getThings()) {
                        if(thing->isItem()) {
                            ItemPtr item = thing->static_self_cast<Item>();
                            fin->addU16(item->getId());
                            fin->addU8(item->getCountOrSubType());
                        }
                    }

                    // end of tile
                    fin->addU16(0xFFFF);
                }
            }
        }

        // end of file
        Position invalidPos;
        fin->addU16(invalidPos.x);
        fin->addU16(invalidPos.y);
        fin->addU8(invalidPos.z);

        fin->flush();

        fin->close();
    } catch(stdext::exception& e) {
        g_logger.error(stdext::format("failed to save OTCM map: %s", e.what()));
    }
}

void Map::saveOtbm(const std::string& fileName)
{
    try {
        FileStreamPtr fin = g_resources.createFile(fileName);
        if(!fin)
            stdext::throw_exception(stdext::format("failed to open file '%s' for write", fileName));

        fin->cache();
        std::string dir;
        if(fileName.find_last_of('/') == std::string::npos)
            dir = g_resources.getWorkDir();
        else
            dir = fileName.substr(0, fileName.find_last_of('/'));

        uint32 version = 0;
        if(g_things.getOtbMajorVersion() < ClientVersion820)
            version = 1;
        else
            version = 2;

        /// Usually when a map has empty house/spawn file it means the map is new.
        /// TODO: Ask the user for a map name instead of those ugly uses of substr
        std::string::size_type sep_pos;
        std::string houseFile = getHouseFile();
        std::string spawnFile = getSpawnFile();
        std::string cpyf;

        if((sep_pos = fileName.rfind('.')) != std::string::npos && stdext::ends_with(fileName, ".otbm"))
            cpyf = fileName.substr(0, sep_pos);

        if(houseFile.empty())
            houseFile = cpyf + "-houses.xml";

        if(spawnFile.empty())
            spawnFile = cpyf + "-spawns.xml";

        /// we only need the filename to save to, the directory should be resolved by the OTBM loader not here
        if((sep_pos = spawnFile.rfind('/')) != std::string::npos)
            spawnFile = spawnFile.substr(sep_pos + 1);

        if((sep_pos = houseFile.rfind('/')) != std::string::npos)
            houseFile = houseFile.substr(sep_pos + 1);

        fin->addU32(0); // file version
        OutputBinaryTreePtr root(new OutputBinaryTree(fin));
        {
            root->addU32(version);

            Size mapSize = getSize();
            root->addU16(mapSize.width());
            root->addU16(mapSize.height());

            root->addU32(g_things.getOtbMajorVersion());
            root->addU32(g_things.getOtbMinorVersion());

            root->startNode(OTBM_MAP_DATA);
            {
                root->addU8(OTBM_ATTR_DESCRIPTION);
                root->addString(m_attribs.get<std::string>(OTBM_ATTR_DESCRIPTION));

                root->addU8(OTBM_ATTR_SPAWN_FILE);
                root->addString(spawnFile);

                root->addU8(OTBM_ATTR_HOUSE_FILE);
                root->addString(houseFile);

                int px = -1, py = -1, pz =-1;
                bool firstNode = true;

                for(uint8_t z = 0; z <= Otc::MAX_Z; ++z) {
                    for(const auto& it : m_tileBlocks[z]) {
                        const TileBlock& block = it.second;
                        for(const TilePtr& tile : block.getTiles()) {
                            if(unlikely(!tile || tile->isEmpty()))
                                continue;

                            const Position& pos = tile->getPosition();
                            if(unlikely(!pos.isValid()))
                                continue;

                            if(pos.x < px || pos.x >= px + 256
                                    || pos.y < py || pos.y >= py + 256
                                    || pos.z != pz) {
                                if(!firstNode)
                                    root->endNode(); /// OTBM_TILE_AREA

                                firstNode = false;
                                root->startNode(OTBM_TILE_AREA);

                                px = pos.x & 0xFF00;
                                py = pos.y & 0xFF00;
                                pz = pos.z;
                                root->addPos(px, py, pz);
                            }

                            root->startNode(tile->isHouseTile() ? OTBM_HOUSETILE : OTBM_TILE);
                            root->addPoint(Point(pos.x, pos.y) & 0xFF);
                            if(tile->isHouseTile())
                                root->addU32(tile->getHouseId());

//.........这里部分代码省略.........