> You really need to check the specification on each function. Sure, but I need to do that anyway and constantly, since I use far too many API's to memorize. I

> You really need to check the specification on each function. Sure, but I need to do that anyway and constantly, since I use far too many API's to memorize. It's also convenient to make cleanup(NULL) a no-op for the API's you create. NULL is zero. Even if the standard would allow it to be something else, it's not relevant with the compilers and platforms I use. There's no point in being a language lawyer just to achieve "portability" to some imaginary platform where a byte is 7 bits and NULL == 0xdeadbeef. Make a list of compilers and platforms you support and forget the rest if you want to get stuff done.