C++ FileSystem::GetLastModifiedTime方法代码示例

void Asset::UpdateFileTimestamp()
{
    FileSystem* fs = GetSubsystem<FileSystem>();

    if (fs->FileExists(path_))
    {
        fileTimestamp_ = fs->GetLastModifiedTime(path_);
    }
}

bool Shader::ProcessSource(String& code, Deserializer& source)
{
    ResourceCache* cache = GetSubsystem<ResourceCache>();
    
    // If the source if a non-packaged file, store the timestamp
    File* file = dynamic_cast<File*>(&source);
    if (file && !file->IsPackaged())
    {
        FileSystem* fileSystem = GetSubsystem<FileSystem>();
        String fullName = cache->GetResourceFileName(file->GetName());
        unsigned fileTimeStamp = fileSystem->GetLastModifiedTime(fullName);
        if (fileTimeStamp > timeStamp_)
            timeStamp_ = fileTimeStamp;
    }
    
    // Store resource dependencies for includes so that we know to reload if any of them changes
    if (source.GetName() != GetName())
        cache->StoreResourceDependency(this, source.GetName());
    
    while (!source.IsEof())
    {
        String line = source.ReadLine();
        
        if (line.StartsWith("#include"))
        {
            String includeFileName = GetPath(source.GetName()) + line.Substring(9).Replaced("\"", "").Trimmed();
            
            SharedPtr<File> includeFile = cache->GetFile(includeFileName);
            if (!includeFile)
                return false;
            
            // Add the include file into the current code recursively
            if (!ProcessSource(code, *includeFile))
                return false;
        }
        else
        {
            code += line;
            code += "\n";
        }
    }

    // Finally insert an empty line to mark the space between files
    code += "\n";
    
    return true;
}

void AssetDatabase::HandleFileChanged(StringHash eventType, VariantMap& eventData)
{
    using namespace FileChanged;
    const String& fullPath = eventData[P_FILENAME].GetString();

    FileSystem* fs = GetSubsystem<FileSystem>();

    String pathName, fileName, ext;

    SplitPath(fullPath, pathName, fileName, ext);

    // ignore changes in the Cache resource dir
    if (fullPath == GetCachePath() || pathName.StartsWith(GetCachePath()))
        return;

    // don't care about directories and asset file changes
    if (fs->DirExists(fullPath) || ext == ".asset")
        return;

    Asset* asset = GetAssetByPath(fullPath);

    if (!asset && fs->FileExists(fullPath))
    {
        Scan();
        return;
    }

    if (asset)
    {
        if(!fs->Exists(fullPath))
        {
            DeleteAsset(asset);
        }
        else
        {
            if (asset->GetFileTimestamp() != fs->GetLastModifiedTime(asset->GetPath()))
            {
                asset->SetDirty(true);
                Scan();
            }
        }
    }
}

void LicenseSystem::RequestServerVerification(const String& key)
{
    if (serverVerification_.NotNull())
    {
        ATOMIC_LOGERROR("LicenseSystem::RequestServerLicense - request already exists");
        return;
    }

    FileSystem* fileSystem = GetSubsystem<FileSystem>();

    if (fileSystem->FileExists(licenseCachePath_))
    {
        Time* time = GetSubsystem<Time>();
        unsigned currentTime = time->GetTimeSinceEpoch();
        unsigned fileTime = fileSystem->GetLastModifiedTime(licenseCachePath_);
        unsigned deltaMinutes = (currentTime - fileTime)/60;
        if (deltaMinutes < 1)
        {
            ATOMIC_LOGINFOF("%u minutes, using cached license", deltaMinutes);
            SendEvent(E_LICENSE_SUCCESS);
            return;
        }
    }

    ATOMIC_LOGINFO("LicenseSystem::RequestServerLicense - requesting verification");

    key_ = key;
    CurlManager* cm = GetSubsystem<CurlManager>();
    String post;
    String id = GenerateMachineID();
    post.AppendWithFormat("key=%s&id=%s", key.CString(), id.CString());

    serverVerification_ = cm->MakeRequest("https://store.atomicgameengine.com/licenses/license_verify.php", post);

    SubscribeToEvent(serverVerification_, E_CURLCOMPLETE, ATOMIC_HANDLER(LicenseSystem, HandleVerification));
}

bool ShaderVariation::LoadByteCode(const String& binaryShaderName)
{
    ResourceCache* cache = owner_->GetSubsystem<ResourceCache>();
    if (!cache->Exists(binaryShaderName))
        return false;

    FileSystem* fileSystem = owner_->GetSubsystem<FileSystem>();
    unsigned sourceTimeStamp = owner_->GetTimeStamp();
    // If source code is loaded from a package, its timestamp will be zero. Else check that binary is not older
    // than source
    if (sourceTimeStamp && fileSystem->GetLastModifiedTime(cache->GetResourceFileName(binaryShaderName)) < sourceTimeStamp)
        return false;

    SharedPtr<File> file = cache->GetFile(binaryShaderName);
    if (!file || file->ReadFileID() != "USHD")
    {
        ATOMIC_LOGERROR(binaryShaderName + " is not a valid shader bytecode file");
        return false;
    }

    /// \todo Check that shader type and model match
    /*unsigned short shaderType = */file->ReadUShort();
    /*unsigned short shaderModel = */file->ReadUShort();

    unsigned numParameters = file->ReadUInt();
    for (unsigned i = 0; i < numParameters; ++i)
    {
        String name = file->ReadString();
        unsigned reg = file->ReadUByte();
        unsigned regCount = file->ReadUByte();

        ShaderParameter parameter;
        parameter.type_ = type_;
        parameter.name_ = name;
        parameter.register_ = reg;
        parameter.regCount_ = regCount;
        parameters_[StringHash(name)] = parameter;
    }

    unsigned numTextureUnits = file->ReadUInt();
    for (unsigned i = 0; i < numTextureUnits; ++i)
    {
        /*String unitName = */file->ReadString();
        unsigned reg = file->ReadUByte();

        if (reg < MAX_TEXTURE_UNITS)
            useTextureUnit_[reg] = true;
    }

    unsigned byteCodeSize = file->ReadUInt();
    if (byteCodeSize)
    {
        byteCode_.Resize(byteCodeSize);
        file->Read(&byteCode_[0], byteCodeSize);

        if (type_ == VS)
            ATOMIC_LOGDEBUG("Loaded cached vertex shader " + GetFullName());
        else
            ATOMIC_LOGDEBUG("Loaded cached pixel shader " + GetFullName());

        return true;
    }
    else
    {
        ATOMIC_LOGERROR(binaryShaderName + " has zero length bytecode");
        return false;
    }
}