MATLAB: How to prevent the MATLAB Compiler-generated shared library functions from displaying printed text to the screen

boxcompilererrorhandlerlibraryMATLAB Compilermessagemsgboxoverrideprintsharedstderrstdout

I would like to obtain a string containing the text that is normally output to the screen from my MATLAB Compiler-generated shared libraries. Instead of automatically printing these messages, I would like to display them in a dialog box, or otherwise alter how my application displays the text of the message. MATLAB Compiler 3.0 (R13) provided the "mlfSetPrintHandler" function for this purpose, but this function seems to no longer exist in MATLAB Compiler 4.0 (R14).

Best Answer

To achieve the same functionality as the "mlfSetPrintHandler" function, you can create your own version of the "mclDefaultPrintHandler" function in the code that uses your library. For more information you can refer to the following location:

https://www.mathworks.com/help/compiler_sdk/cxx/matlab-compiler-generated-interface-functions.html#f2-1008529

To use your version of the "mclDefaultPrintHandler" function, you will need to pass a pointer to the function when you initialize your library using the "[libname]InitializeWithHandlers" form of the initialization function, where <libname> is the name of your shared library. For more information, you can refer to the following location:

https://www.mathworks.com/help/compiler_sdk/cxx/matlab-compiler-generated-interface-functions.html#f2-1008496

Related Solutions

MATLAB: How to prevent the error dialog from blocking a compiled standalone application from exiting

There are two solutions for this: Either enable displaying to the shell or catch the exception and terminate the program.

When the "Do not display the Windows Command Shell (console) for execution" check box under "Additional runtime settings" in the Application Compiler GUI is checked, or if you compile with "mcc" using "-e" (or "-W WinMain -T link:exe"), then error messages will be rerouted to a dialog box. Enabling displaying to shell will display the error in the shell from which the program is run.

See the following documentation page for more information:

https://www.mathworks.com/help/compiler/customizing-the-installer.html#mw_57c9a012-9db5-4e21-b82b-441b4711f612

Alternatively, if you would like to terminate the application when there is an uncaught error only in the deployed application, then you can wrap your code in a try-catch block, and in the catch block, do any necessary logging and call quit/exit with the appropriate exit code after checking if the script is deployed:

try
    myProgramScript;
catch E
    % do something with caught exception
    if isdeployed 
        quit(-1)
    end
end

MATLAB: How to pass arguments to mclRunMain (argc and argv) while using a MATLAB generated C++ shared library

It is possible to pass command line arguments to "mclRunMain" while integrating a MATLAB generated C++ shared library. Please find an attached example which includes an implemented simple string concatenation function which accept 2 strings from the command line and prints the concatenated string. I have used the following MATLAB code to create shared library:

function out = concatString(input1,input2)
  out =  strcat(input1,input2);
end

Refer to the attached C++ code to see how to integrate this shared library.

Also, refer to the following link to see how to integrate the C++ shared library in your code: <https://www.mathworks.com/help/compiler_sdk/cxx/integrate-a-cc-shared-library-into-an-application.html>

Best Answer

Related Solutions

MATLAB: How to prevent the error dialog from blocking a compiled standalone application from exiting

MATLAB: How to pass arguments to mclRunMain (argc and argv) while using a MATLAB generated C++ shared library

Related Question