gstlearn documentation and a problem in MSVC 2022 (windows 11)

[jbensabat]

Hello I have built the lib and I am now trying to run the examples. Some of them are obvious but others are more complex. Is there documentation available on gstlearn ? about what it does and how it is organized, ?

also, running the examples can lead to exceptions which occur in the following function

/**

• Restore original stdout */ void StdoutRedirect::stop() {

  if defined(_WIN32) || defined(_WIN64)

  // https://stackoverflow.com/questions/32185512/output-to-console-from-a-win32-gui-application-on-windows-10 if (_old_stdout) { SetStdHandle(STD_OUTPUT_HANDLE, _old_stdout); int fd = _open_osfhandle((intptr_t)_old_stdout, _O_WRONLY | _O_TEXT); if (fd >= 0) { FILE* fp = _fdopen(fd, "w"); freopen_s(&fp, "CONOUT$", "w", stdout); } }

  else

  std::cout.rdbuf(_coutbuf); _out.close();

  endif

  }

under windows _open_osfhandle returns a negative value thus creating an exception in _fdopen I just placed a condition on the value of fd

best jac

[fabien-ors]

Thank you for reporting. Documentation is still (always ^^) under development. But you can find tutorials, courses and API description on the official website: https://gstlearn.org

To have a first overview of what gstlearn provides, I suggest you to read our courses: https://gstlearn.org/?page_id=193

All what is available in python or R is available in C++. The API available is described through doxygen HTML files: https://gstlearn.org/?page_id=91

[jbensabat]

hi thanks a lot jac

[fabien-ors]

@jbensabat : Please, could you provide me a reproducible example that leads to the exception you are talking about ? I never experienced this exception with my windows (Visual or MinGW). I have done a small fix in 49298c9 to prevent calling "stop" method when the redirection is not active, but all of our tests use an active redirection. Thank you for your help.

[jbensabat]

Good morning I compiled the lib and examples with MSVC2022/64bit we got the same exception for every example we ran (we did not run all the examples though) I solved the problem transforming the stop() method namely, you call int fd = _open_osfhandle((intptr_t)_old_stdout, _O_WRONLY | _O_TEXT); what I have seen is that I got fd=-1, which caused the exception when calling _fdopen(fd,.. best jac

void StdoutRedirect::stop() {

if defined(_WIN32) || defined(_WIN64)

// https://stackoverflow.com/questions/32185512/output-to-console-from-a-win32-gui-application-on-windows-10 if (_old_stdout) { SetStdHandle(STD_OUTPUT_HANDLE, _old_stdout); int fd = _open_osfhandle((intptr_t)_old_stdout, _O_WRONLY | _O_TEXT); **if (fd >= 0) { FILE fp = _fdopen(fd, "w"); freopen_s(&fp, "CONOUT$", "w", stdout); } }

else

std::cout.rdbuf(_coutbuf);** _out.close();

endif

}

[fabien-ors]

Fixed in v1.1.0