Esempi in C++ (Cpp) per NewIStream

Esempio n. 1

File: textstream.cpp Progetto: arichnad/povray

ITextStream::ITextStream(const UCS2 *sname, unsigned int stype)
{
	if(sname == NULL)
		throw POV_EXCEPTION_CODE(kParamErr);

	stream = NewIStream(sname, stype);
	if(stream == NULL)
		throw POV_EXCEPTION(kCannotOpenFileErr, string("Cannot open file '") + UCS2toASCIIString(sname) + "' for input.");

	filename = UCS2String(sname);
	lineno = 1;
	bufferoffset = 0;
	maxbufferoffset = 0;
	filelength = 0;
	ungetbuffer = EOF;
	curpos = 0 ;

	stream->seekg(0, IOBase::seek_end);
	filelength = stream->tellg();
	stream->seekg(0, IOBase::seek_set);

	RefillBuffer();
}

Esempio n. 2

File: backendscenedata.cpp Progetto: Clodo76/povray

IStream *BackendSceneData::ReadFile(POVMSContext ctx, const UCS2String& origname, const UCS2String& filename, unsigned int stype)
{
    UCS2String scenefile(filename);
    UCS2String localfile;
    UCS2String fileurl;

#ifdef USE_SCENE_FILE_MAPPING
    // see if the file is available locally
    FilenameToFilenameMap::iterator ilocalfile(scene2LocalFiles.find(scenefile));

    // if available locally, open it end return
    if(ilocalfile != scene2LocalFiles.end())
        return NewIStream(ilocalfile->second.c_str(), stype);

    // now try the original name as given in the scene
    if((ilocalfile = scene2LocalFiles.find(origname)) != scene2LocalFiles.end())
        return NewIStream(ilocalfile->second.c_str(), stype);

    // see if the file is available as temporary file
    FilenameToFilenameMap::iterator itempfile(scene2TempFiles.find(scenefile));

    // if available as temporary file, open it end return
    if(itempfile != scene2TempFiles.end())
        return NewIStream(itempfile->second.c_str(), stype);

    // otherwise, request the file
    RenderBackend::SendReadFile(ctx, sceneId, frontendAddress, scenefile, localfile, fileurl);

    // if it is available locally, add it to the map and then open it
    if(localfile.length() > 0)
    {
        scene2LocalFiles[scenefile] = localfile;
        local2SceneFiles[localfile] = scenefile;

        // yes this is a hack
        scene2LocalFiles[origname] = localfile;

        return NewIStream(localfile.c_str(), stype);
    }

    // if it is available remotely ...
    if(fileurl.length() > 0)
    {
        // create a temporary file
        UCS2String tempname = POV_PLATFORM_BASE.CreateTemporaryFile();
        OStream *tempfile = NewOStream(tempname.c_str(), stype, false);

        if(tempfile == NULL)
        {
            POV_PLATFORM_BASE.DeleteTemporaryFile(tempname);
            throw POV_EXCEPTION_CODE(kCannotOpenFileErr);
        }

        // download the file from the URL
        // TODO - handle referrer
        if(POV_PLATFORM_BASE.ReadFileFromURL(tempfile, fileurl) == false)
        {
            delete tempfile;
            POV_PLATFORM_BASE.DeleteTemporaryFile(tempname);
            throw POV_EXCEPTION_CODE(kNetworkConnectionErr);
        }

        delete tempfile;

        // add the temporary file to the map
        scene2TempFiles[scenefile] = tempname;
        temp2SceneFiles[tempname] = scenefile;

        return NewIStream(tempname.c_str(), stype);
    }

    // file not found
    return NULL;
#else
    return NewIStream(filename.c_str(), stype);
#endif
}