Function transfer_progress_cb

core/os/os-emscripten.c:27–33

static char file_buf[500] = {0};

static bool transfer_progress_cb(void *context, int value, int total) {
    (void)context;
    EM_ASM({
        if (window.transferProgressCallback) { transferProgressCallback($0, $1); }
    }, value, total);
    return false;
}

static int emu_send_variable_with_cb(const char *file, int location, usb_progress_handler_t *progress_handler) {
    return emu_send_variables(&file, 1, location, progress_handler, NULL);