This is a good question! I think the confusion that it’s causing is due to Intel’s strange naming schemes which often overload terms standard in academia. I will try to both answer your question and also clear up the confusion I see in the comments. First of all. I agree that in standard computer science … Read more
According to the C spec: An integer constant expression with the value 0, or such an expression cast to type void *, is called a null pointer constant. 55) If a null pointer constant is converted to a pointer type, the resulting pointer, called a null pointer, is guaranteed to compare unequal to a pointer … Read more
Firmware developer here. This is a standard problem in embedded programming, and one that trips up many (even very experienced) developers. My assumption is that you are attempting to access a hardware register, and that register value can change over time (be it interrupt status, timer, GPIO indications, etc.). The volatile keyword is only part … Read more
On older machines, codes smaller than 8 bits were fairly common, but most of those have been dead and gone for years now. C and C++ have mandated a minimum of 8 bits for char, at least as far back as the C89 standard. [Edit: For example, C90, ยง5.2.4.2.1 requires CHAR_BIT >= 8 and UCHAR_MAX … Read more