Even more so, over the years I've seen in the wild and had cause to roll similar multiple entry points to functions, so standard practice predates both those dates by a decade or two. It is always good to see it written down to share the idea to the next generation.

CPC is something I've longed for in the past. I've always thought C could do with just a couple more features related to function call and frame management to make it the ideal portable low level language.