For example, in the reference:
type va_arg (va_list ap, type)
Does ap
stand for argument pointer? Something else?
That's actually an easy question to answer.
ap
stands for argument pointer.
From The C Programming Language, Second Edition, Brian W. Kernighan and Dennis M. Ritchie:
7.3 Variable-length Argument Lists
[...] The type va_list is used to declare a variable that will refer to each argument in turn; in minprintf, this variable is called ap, for "argument pointer"
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