Get a better editor. I can mouse over FILE_HEADER_OFFSET anywhere it's used and get the value. But still your describing a bit of a wild setup. If the value

Get a better editor. I can mouse over FILE_HEADER_OFFSET anywhere it's used and get the value. But still your describing a bit of a wild setup. If the value of FILE_HEADER_OFFSET is 42, how did you come to calculating the value? What if MEMORY_BLOB_OFFSET is also coincidentally 42? If you have dozens of source files filled with literal magic values that's completely unmaintainable and inscrutable. A constant doesn't have to be in a separate file if it's only used in one place.