second argument of the command line arguments in a format other than char** argv or char* argv[] [closed]

Answer 1

It doesn't look like it needs to be main after all, so you could do like this:

#include 
#include 
#include 

int cppmain(std::string program, std::vector args) {
    std::cout << program << " got arguments:\n";
    for(auto& arg : args) {
        std::cout << " " << arg << "\n";
    }
    return 0;
}

int main(int argc, char* argv[]) {
    // create a string from the program name and a vector of strings from the arguments
    return cppmain(argv[0], {argv + 1, argv + argc});
}

---

In case you need to call a closed source main-like function (that you can not change), create a wrapper function that you can pybind to and let that function call the closed source function.

#include 
#include 
#include 
#include 

int closed_source_function(int argc, char* argv[]) {
    for(int i = 0; i < argc; ++i) {
        std::cout << argv[i] << '\n';
    }
    return 0;
}

int pybind_to_this(std::vector args) {
    // create a char*[]
    std::vector argv(args.size() + 1);

    // make the pointers point to the C strings in the std::strings in the
    // std::vector
    for(size_t i = 0; i < args.size(); ++i) {
        argv[i] = args[i].data();
    }

    // add a terminating nullptr (main wants that, so perhaps the closed source
    // function wants it too)
    argv[args.size()] = nullptr;

    // call the closed source function
    return closed_source_function(static_cast(args.size()), argv.data());
}