当前位置: 首页>>代码示例>>C++>>正文

C++ NPT_InputStreamReference::Seek方法代码示例

本文整理汇总了C++中NPT_InputStreamReference::Seek方法的典型用法代码示例。如果您正苦于以下问题：C++ NPT_InputStreamReference::Seek方法的具体用法？C++ NPT_InputStreamReference::Seek怎么用？C++ NPT_InputStreamReference::Seek使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类NPT_InputStreamReference的用法示例。


在下文中一共展示了NPT_InputStreamReference::Seek方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: file_stream_ref

/*----------------------------------------------------------------------
|   NPT_ZipFile::GetInputStream
+---------------------------------------------------------------------*/
NPT_Result
NPT_ZipFile::GetInputStream(Entry& entry, NPT_InputStreamReference& zip_stream, NPT_InputStream*& file_stream)
{
    // default return value
    file_stream = NULL;

    // we don't support encrypted files
    if (entry.m_Flags & NPT_ZIP_FILE_FLAG_ENCRYPTED) {
        return NPT_ERROR_NOT_SUPPORTED;
    }

    // check that we support the compression method
#if NPT_CONFIG_ENABLE_ZIP
    if (entry.m_CompressionMethod != NPT_ZIP_FILE_COMPRESSION_METHOD_NONE &&
            entry.m_CompressionMethod != NPT_ZIP_FILE_COMPRESSION_METHOD_DEFLATE) {
        return NPT_ERROR_NOT_SUPPORTED;
    }
#else
    if (entry.m_CompressionMethod != NPT_ZIP_FILE_COMPRESSION_METHOD_NONE) {
        return NPT_ERROR_NOT_SUPPORTED;
    }
#endif

    // seek to the start of the file entry
    NPT_Result result = zip_stream->Seek(entry.m_RelativeOffset);
    if (NPT_FAILED(result)) {
        NPT_LOG_WARNING_1("seek failed (%d)", result);
        return result;
    }

    // read the fixed part of the header
    unsigned char header[30];
    result = zip_stream->ReadFully(header, 30);
    if (NPT_FAILED(result)) {
        NPT_LOG_WARNING_1("read failed (%d)", result);
        return result;
    }

    NPT_UInt16 file_name_length   = NPT_BytesToInt16Le(&header[26]);
    NPT_UInt16 extra_field_length = NPT_BytesToInt16Le(&header[28]);

    unsigned int header_size = 30+file_name_length+extra_field_length;
    NPT_LargeSize zip_stream_size = 0;
    zip_stream->GetSize(zip_stream_size);
    if (entry.m_RelativeOffset+header_size+entry.m_CompressedSize > zip_stream_size) {
        // something's wrong here
        return NPT_ERROR_INVALID_FORMAT;
    }

    file_stream = new NPT_SubInputStream(zip_stream, entry.m_RelativeOffset+header_size, entry.m_CompressedSize);

#if NPT_CONFIG_ENABLE_ZIP
    if (entry.m_CompressionMethod == NPT_ZIP_FILE_COMPRESSION_METHOD_DEFLATE) {
        NPT_InputStreamReference file_stream_ref(file_stream);
        file_stream = new NPT_ZipInflatingInputStream(file_stream_ref, true);
    }
#endif

    return NPT_SUCCESS;
}
开发者ID:sandalsoft，项目名称:mrmc，代码行数:63，代码来源:NptZip.cpp

示例2: 

/*----------------------------------------------------------------------
|   PLT_HttpHelper::IsBodyStreamSeekable
+---------------------------------------------------------------------*/
bool
PLT_HttpHelper::IsBodyStreamSeekable(NPT_HttpMessage* message)
{
    NPT_HttpEntity* entity = message->GetEntity();
    NPT_InputStreamReference stream;
    if (!entity || NPT_FAILED(entity->GetInputStream(stream))) return true;

    // try to get current position and seek there
    NPT_Position position;
    if (NPT_FAILED(stream->Tell(position)) || 
        NPT_FAILED(stream->Seek(position))) {
        return false;
    }

    return true;
}
开发者ID:Avoidnf8，项目名称:xbmc-fork，代码行数:19，代码来源:PltHttp.cpp

示例3: serveFile2

void serveFile2(AbortableTask *task, const NPT_String& filePath, const NPT_String& mimeType, const FrontEnd::RequestContext& reqCtx, const NPT_HttpRequest *req, NPT_HttpResponse& resp, HttpOutput *httpOutput)
{
#if 1
	NPT_File f(filePath);
	NPT_FileInfo fileInfo;
	if (NPT_FAILED(f.GetInfo(fileInfo)) || fileInfo.m_Type != NPT_FileInfo::FILE_TYPE_REGULAR || NPT_FAILED(f.Open(NPT_FILE_OPEN_MODE_READ))) {
		setStatusCode(resp, 404);
		httpOutput->writeResponseHeader(resp);
		return;
	}

	NPT_InputStreamReference fileInput;
	f.GetInputStream(fileInput);
	serveStream(task, fileInput.AsPointer(), fileInfo.m_ModificationTime, mimeType, reqCtx, req, resp, httpOutput);
#else
	bool isGetMethod = req->GetMethod().Compare("GET") == 0;
	bool isHeadMethod = req->GetMethod().Compare("HEAD") == 0;
	if (isGetMethod || isHeadMethod) {
		NPT_Result nr;
		NPT_File f(filePath);
		NPT_FileInfo fileInfo;
		if (NPT_FAILED(f.GetInfo(fileInfo)) || fileInfo.m_Type != NPT_FileInfo::FILE_TYPE_REGULAR || NPT_FAILED(f.Open(NPT_FILE_OPEN_MODE_READ))) {
			setStatusCode(resp, 404);
			httpOutput->writeResponseHeader(resp);
			return;
		}

		NPT_InputStreamReference fileInput;
		f.GetInputStream(fileInput);

		NPT_UInt64 offset, length;

		NPT_HttpHeader *hdrRange = req->GetHeaders().GetHeader("RANGE");
		if (hdrRange) {
			if (!parseRangeHeader(hdrRange->GetValue(), fileInfo.m_Size, offset, length)) {
				setStatusCode(resp, 416);
				httpOutput->writeResponseHeader(resp);
				return;
			}
			setStatusCode(resp, 206);
			resp.GetHeaders().SetHeader(NPT_HTTP_HEADER_CONTENT_RANGE, NPT_String::Format("bytes %s-%s/%s", NPT_String::FromIntegerU(offset).GetChars(), NPT_String::FromIntegerU(offset + length - 1).GetChars(), NPT_String::FromIntegerU(fileInfo.m_Size).GetChars()));
			fileInput->Seek(offset);
		} else {
			offset = 0;
			length = fileInfo.m_Size;
			setStatusCode(resp, 200);
		}

		resp.GetHeaders().SetHeader(NPT_HTTP_HEADER_CONTENT_TYPE, mimeType);
		resp.GetHeaders().SetHeader(NPT_HTTP_HEADER_CONTENT_LENGTH, NPT_String::FromIntegerU(length));
		resp.GetHeaders().SetHeader("Last-Modified", NPT_DateTime(fileInfo.m_ModificationTime).ToString(NPT_DateTime::FORMAT_RFC_1123));
		resp.GetHeaders().SetHeader("Accept-Ranges", "bytes");

		resp.GetHeaders().SetHeader("EXT", "");
		if (reqCtx.transferMode != FrontEnd::TM_None) {
			const char *transferMode = "Streaming";
			switch (reqCtx.transferMode) {
			case FrontEnd::TM_Background:
				transferMode = "Background";
				break;
			case FrontEnd::TM_Interactive:
				transferMode = "Interactive";
				break;
			}
			resp.GetHeaders().SetHeader("transferMode.dlna.org", transferMode);
		}

		if (reqCtx.getcontentFeaturesReq) {
			NPT_String contentFeatures("DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01700000000000000000000000000000");
			resp.GetHeaders().SetHeader("contentFeatures.dlna.org", contentFeatures);
		}

		httpOutput->writeResponseHeader(resp);

		if (isGetMethod) {

			bool abortFlag = false;
			ServeFileAbortCallback abortCallback(&abortFlag);

			if (task->registerAbortCallback(&abortCallback)) {
				NPT_DataBuffer buffer(4096);

				NPT_UInt64 cbRemain = length;

				for (;;) {
					if (abortFlag) {
						break;
					}

					if (cbRemain == 0) {
						break;
					}

					NPT_Size cbRead;
					NPT_UInt64 cbToRead = cbRemain;
					if (cbToRead > buffer.GetBufferSize()) {
						cbToRead = buffer.GetBufferSize();
					}
					nr = fileInput->Read(buffer.UseData(), buffer.GetBufferSize(), &cbRead);
					if (NPT_FAILED(nr)) {
//.........这里部分代码省略.........
开发者ID:bubbletreefrog，项目名称:DLNA，代码行数:101，代码来源:DJMediaStore.cpp

示例4: tmp_context

/*----------------------------------------------------------------------
|   PLT_HttpServer::ServeStream
+---------------------------------------------------------------------*/
NPT_Result 
PLT_HttpServer::ServeStream(const NPT_HttpRequest&        request, 
                            const NPT_HttpRequestContext& context,
                            NPT_HttpResponse&             response,
                            NPT_InputStreamReference&     body, 
                            const char*                   content_type) 
{    
    if (body.IsNull()) return NPT_FAILURE;
    
    // set date
    NPT_TimeStamp now;
    NPT_System::GetCurrentTimeStamp(now);
    response.GetHeaders().SetHeader("Date", NPT_DateTime(now).ToString(NPT_DateTime::FORMAT_RFC_1123), true);
    
    // get entity
    NPT_HttpEntity* entity = response.GetEntity();
    NPT_CHECK_POINTER_FATAL(entity);
    
    // set the content type
    entity->SetContentType(content_type);
    
    // check for range requests
    const NPT_String* range_spec = request.GetHeaders().GetHeaderValue(NPT_HTTP_HEADER_RANGE);
    
    // setup entity body
    NPT_CHECK(NPT_HttpFileRequestHandler::SetupResponseBody(response, body, range_spec));
              
    // set some default headers
    if (response.GetEntity()->GetTransferEncoding() != NPT_HTTP_TRANSFER_ENCODING_CHUNKED) {
        // set but don't replace Accept-Range header only if body is seekable
        NPT_Position offset;
        if (NPT_SUCCEEDED(body->Tell(offset)) && NPT_SUCCEEDED(body->Seek(offset))) {
            response.GetHeaders().SetHeader(NPT_HTTP_HEADER_ACCEPT_RANGES, "bytes", false); 
        }
    }
    
    // set getcontentFeatures.dlna.org
    const NPT_String* value = request.GetHeaders().GetHeaderValue("getcontentFeatures.dlna.org");
    if (value) {
        PLT_HttpRequestContext tmp_context(request, context);
        const char* dlna = PLT_ProtocolInfo::GetDlnaExtension(entity->GetContentType(),
                                                              &tmp_context);
        if (dlna) response.GetHeaders().SetHeader("ContentFeatures.DLNA.ORG", dlna, false);
    }
    
    // transferMode.dlna.org
    value = request.GetHeaders().GetHeaderValue("transferMode.dlna.org");
    if (value) {
        // Interactive mode not supported?
        /*if (value->Compare("Interactive", true) == 0) {
            response.SetStatus(406, "Not Acceptable");
            return NPT_SUCCESS;
        }*/
        
        response.GetHeaders().SetHeader("TransferMode.DLNA.ORG", value->GetChars(), false);
    } else {
        response.GetHeaders().SetHeader("TransferMode.DLNA.ORG", "Streaming", false);
    }
    
    if (request.GetHeaders().GetHeaderValue("TimeSeekRange.dlna.org")) {
        response.SetStatus(406, "Not Acceptable");
        return NPT_SUCCESS;
    }
    
    return NPT_SUCCESS;
}
开发者ID:1c0n，项目名称:xbmc，代码行数:69，代码来源:PltHttpServer.cpp

示例5: file


//.........这里部分代码省略.........
    result = NPT_File::ListDirectory("foobar.dir", entries);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    NPT_ASSERT(entries.GetItemCount() == 3);

    result = NPT_File::DeleteFile("foobar.dir");
    NPT_ASSERT(NPT_FAILED(result));
    result = NPT_File::DeleteDirectory("foobar.dir");
    NPT_ASSERT(result == NPT_ERROR_DIRECTORY_NOT_EMPTY);

    result = NPT_File::Rename("foobar.dir", "foobar.dir-r");
    NPT_ASSERT(NPT_SUCCEEDED(result));

    dirname = "foobar.dir-r";
    fname = dirname;
    fname += NPT_FilePath::Separator;
    fname += "file1";
    result = NPT_File::DeleteFile(fname);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    fname = dirname;
    fname += NPT_FilePath::Separator;
    fname += "file2";
    result = NPT_File::DeleteFile(fname);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    fname = dirname;
    fname += NPT_FilePath::Separator;
    fname += "file3";
    result = NPT_File::DeleteFile(fname);
    NPT_ASSERT(NPT_SUCCEEDED(result));

    result = NPT_File::DeleteDirectory("foobar.dir-r");
    NPT_ASSERT(NPT_SUCCEEDED(result));
    NPT_ASSERT(!NPT_File::Exists("foobar.dir-r"));

    // paths
    NPT_String test;
    test = NPT_FilePath::BaseName("");
    NPT_ASSERT(test == "");
    test = NPT_FilePath::BaseName("a");
    NPT_ASSERT(test == "a");
    test = NPT_FilePath::BaseName("a"+NPT_FilePath::Separator+"b");
    NPT_ASSERT(test == "b");
    test = NPT_FilePath::BaseName("a"+NPT_FilePath::Separator+"b"+NPT_FilePath::Separator);
    NPT_ASSERT(test == "");
    test = NPT_FilePath::BaseName(NPT_FilePath::Separator+"a");
    NPT_ASSERT(test == "a");
    test = NPT_FilePath::BaseName(NPT_FilePath::Separator);
    NPT_ASSERT(test == "");

    test = NPT_FilePath::DirectoryName("");
    NPT_ASSERT(test == "");
    test = NPT_FilePath::DirectoryName("a");
    NPT_ASSERT(test == "");
    test = NPT_FilePath::DirectoryName("a"+NPT_FilePath::Separator+"b");
    NPT_ASSERT(test == "a");
    test = NPT_FilePath::DirectoryName("a"+NPT_FilePath::Separator+"b"+NPT_FilePath::Separator);
    NPT_ASSERT(test == "a"+NPT_FilePath::Separator+"b");
    test = NPT_FilePath::DirectoryName(NPT_FilePath::Separator+"a");
    NPT_ASSERT(test == NPT_FilePath::Separator);
    test = NPT_FilePath::DirectoryName(NPT_FilePath::Separator);
    NPT_ASSERT(test == NPT_FilePath::Separator);

    // large files
    if (argc == 2) {
        result = CreateNewFile(argv[1], 0x10000, 0x10007);
        NPT_ASSERT(NPT_SUCCEEDED(result));

        NPT_String new_name = argv[1];
        new_name += ".renamed";
        result = NPT_File::Rename(argv[1], new_name);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        file = NPT_File(new_name);
        result = file.Open(NPT_FILE_OPEN_MODE_READ);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        NPT_InputStreamReference input;
        file.GetInputStream(input);
        NPT_Position position;
        result = input->Tell(position);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        NPT_ASSERT(position == 0);
        NPT_LargeSize large_size = (NPT_LargeSize)0x10007 * (NPT_LargeSize)0x10000;
        result = input->Seek(large_size-0x10007);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        result = input->Tell(position);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        NPT_ASSERT(position == large_size-0x10007);
        unsigned char* buffer = new unsigned char[0x10007];
        result = input->ReadFully(buffer, 0x10007);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        result = input->Tell(position);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        NPT_ASSERT(position == large_size);
        for (unsigned int i=0; i<0x10007; i++) {
            NPT_ASSERT(buffer[i] == (unsigned char)i);
        }
        file.Close();
        NPT_File::DeleteFile(new_name);
    }

    return 0;
}
开发者ID:，项目名称:，代码行数:101，代码来源:

示例6: file


//.........这里部分代码省略.........
    NPT_ASSERT(test == "");
    test = NPT_FilePath::BaseName(NPT_FilePath::Separator+"a");
    NPT_ASSERT(test == "a");
    test = NPT_FilePath::BaseName(NPT_FilePath::Separator);
    NPT_ASSERT(test == "");

    test = NPT_FilePath::DirName("");
    NPT_ASSERT(test == "");
    test = NPT_FilePath::DirName("a");
    NPT_ASSERT(test == "");
    test = NPT_FilePath::DirName("a"+NPT_FilePath::Separator+"b");
    NPT_ASSERT(test == "a");
    test = NPT_FilePath::DirName("a"+NPT_FilePath::Separator+"b"+NPT_FilePath::Separator);
    NPT_ASSERT(test == "a"+NPT_FilePath::Separator+"b");
    test = NPT_FilePath::DirName(NPT_FilePath::Separator+"a");
    NPT_ASSERT(test == NPT_FilePath::Separator);
    test = NPT_FilePath::DirName(NPT_FilePath::Separator);
    NPT_ASSERT(test == NPT_FilePath::Separator);
    
    // small files
    result = CreateNewFile("small.bin", 0x100, 0x107);
    NPT_ASSERT(NPT_SUCCEEDED(result));

    file = NPT_File("small.bin");
    result = file.Open(NPT_FILE_OPEN_MODE_READ);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    NPT_InputStreamReference input;
    file.GetInputStream(input);
    NPT_Position position;
    result = input->Tell(position);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    NPT_ASSERT(position == 0);
    NPT_LargeSize large_size = (NPT_LargeSize)0x107 * (NPT_LargeSize)0x100;
    result = input->Seek(large_size-0x107);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    result = input->Tell(position);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    NPT_ASSERT(position == large_size-0x107);        
    unsigned char* buffer = new unsigned char[0x107];
    result = input->ReadFully(buffer, 0x107);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    result = input->Tell(position);
    NPT_ASSERT(NPT_SUCCEEDED(result));
    NPT_ASSERT(position == large_size);
    for (unsigned int i=0; i<0x107; i++) {
        NPT_ASSERT(buffer[i] == (unsigned char)i);
    }        
    file.Close();
    NPT_File::RemoveFile(file.GetPath());

    // large files
    if (argc == 2) {
        result = CreateNewFile(argv[1], 0x10000, 0x10007);
        NPT_ASSERT(NPT_SUCCEEDED(result));

        NPT_String new_name = argv[1];
        new_name += ".renamed";
        result = NPT_File::Rename(argv[1], new_name);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        file = NPT_File(new_name);
        result = file.Open(NPT_FILE_OPEN_MODE_READ);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        file.GetInputStream(input);
        result = input->Tell(position);
        NPT_ASSERT(NPT_SUCCEEDED(result));
        NPT_ASSERT(position == 0);
开发者ID:AWilco，项目名称:xbmc，代码行数:67，代码来源:FileTest1.cpp


注：本文中的NPT_InputStreamReference::Seek方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。