boost

问题 I'm using boost 1.74. So, without exception catches and rest stuff my actual code looks like: typedef std::vector<int32_t> FlatINT32TArr; using PreviewImageT = bg::rgba8_image_t; using PreviewViewT = bg::rgba8_view_t; using PreviewPixelT = bg::rgba8_pixel_t; void read_pixel_arr(FlatINT32TArr r_preview_flat_arr, const std::wstring& filepath) { std::ifstream byte_stream(filepath, std::ios::binary); PreviewImageT image; bg::read_and_convert_image( byte_stream, image, bg::image_read_settings<bg:

问题 I used the async tcp server example from boost which is near to what my application is doing. The code example below is a fully working example. At first I start an async read operation until the delimiter char. In this case it is the http header complete sequence. The request contains some payload which is "hello world" (11 bytes). For a simplified example I use lambda handlers here. The first handler is called wit a length of 148 which is the header including four bytes for the delimiter

问题 I used the async tcp server example from boost which is near to what my application is doing. The code example below is a fully working example. At first I start an async read operation until the delimiter char. In this case it is the http header complete sequence. The request contains some payload which is "hello world" (11 bytes). For a simplified example I use lambda handlers here. The first handler is called wit a length of 148 which is the header including four bytes for the delimiter

问题 project(learn) cmake_minimum_required(VERSION 3.11) set(CMAKE_CXX_STANDARD 17) if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux") message("Current OS is Linux") include_directories("/mnt/e/c++/boost_1_72_0") link_directories("/mnt/e/c++/boost_1_72_0/stage/lib") link_libraries(pthread boost_thread boost_fiber boost_context) elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") message("Current OS is Windows") include_directories("E:/c++/boost_1_72_0") link_directories("E:/c++/boost_1_72_0/stage/lib") endif($

问题 project(learn) cmake_minimum_required(VERSION 3.11) set(CMAKE_CXX_STANDARD 17) if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux") message("Current OS is Linux") include_directories("/mnt/e/c++/boost_1_72_0") link_directories("/mnt/e/c++/boost_1_72_0/stage/lib") link_libraries(pthread boost_thread boost_fiber boost_context) elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") message("Current OS is Windows") include_directories("E:/c++/boost_1_72_0") link_directories("E:/c++/boost_1_72_0/stage/lib") endif($

问题 In the example of Boost code of serialization bus schedule in its output file "demofile.txt" the first line is: "22 serialization::archive 16 0 0 6 0 0 0 0 0 6 24 4" what is this? Dll version number? Can we suppress this and store only the data itsself? 回答1: That's not a Dll version. It's the archive header. Suppress it by using archive flags it: void save_schedule(const bus_schedule &s, const char * filename){ // make an archive std::ofstream ofs(filename); boost::archive::text_oarchive oa

问题 I want to expand/shrink a polygon with holes using boost::polygon. So to clarify that a bit, I have a single data structure boost::polygon::polygon_with_holes_data<int> inPoly where inPoly contains data that describe a rectangular outline and a triangle which forms the hole within this rectangle (in picture below this is the left, black drawing). Now I want to a) expand the whole stuff so that the rectangle becomes bigger and the hole becomes smaller (resulting in the red polygon in image

问题 I am currently trying to rework some code that was handed down to me. The original point of the code is to read a configuration file, and to set up the different options in the file in a boost::program_options::variable_map, which is then read throughout other parts of the code which is already working fine. Here is the code I am trying to replace: // Some helpful definitions boost::program_options::variables_map vm; std::string filecfg = "File_name"; std::ifstream ifs(filecfg.c_str()); //

问题 I am using boost's message queue to write a basic class with just two char arrays, but the data is not being received in the second process is empty, even though get_num_msg() returns 1 before the read and returns 0 after reading. For debugging purposes I also tried writing and reading from the same process, and that worked fine. I am using the shared pointer because earlier while just reading and writing integers, it would not read the integer at the receiver unless it was declared as shared

问题 I am using boost's message queue to write a basic class with just two char arrays, but the data is not being received in the second process is empty, even though get_num_msg() returns 1 before the read and returns 0 after reading. For debugging purposes I also tried writing and reading from the same process, and that worked fine. I am using the shared pointer because earlier while just reading and writing integers, it would not read the integer at the receiver unless it was declared as shared