Function initialize_interpreter_pre_pyconfig

include/pybind11/embed.h:108–133

#if PY_VERSION_HEX < PYBIND11_PYCONFIG_SUPPORT_PY_VERSION_HEX
inline void initialize_interpreter_pre_pyconfig(bool init_signal_handlers,
                                                int argc,
                                                const char *const *argv,
                                                bool add_program_dir_to_path) {
    detail::precheck_interpreter();
    Py_InitializeEx(init_signal_handlers ? 1 : 0);

    auto argv_size = static_cast<size_t>(argc);
    // SetArgv* on python 3 takes wchar_t, so we have to convert.
    std::unique_ptr<wchar_t *[]> widened_argv(new wchar_t *[argv_size]);
    std::vector<std::unique_ptr<wchar_t[], detail::wide_char_arg_deleter>> widened_argv_entries;
    widened_argv_entries.reserve(argv_size);
    for (size_t ii = 0; ii < argv_size; ++ii) {
        widened_argv_entries.emplace_back(detail::widen_chars(argv[ii]));
        if (!widened_argv_entries.back()) {
            // A null here indicates a character-encoding failure or the python
            // interpreter out of memory. Give up.
            return;
        }
        widened_argv[ii] = widened_argv_entries.back().get();
    }

    auto *pysys_argv = widened_argv.get();

    PySys_SetArgvEx(argc, pysys_argv, static_cast<int>(add_program_dir_to_path));
}
#endif

PYBIND11_NAMESPACE_END(detail)