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It's very annoying that #ISO #C has fixed-width integer types in stdint.h, but doesn't provide #libc functions for working with them, like for instance, strtoi32(). Heck, standard C doesn't even have strtoint() for regular ints!
the closest I've come is strtoi() which lets you specify bounds, so you could use E.G. INT32_MIN & INT32_MAX, but that's a nonstandard #BSD extension.
So you have to use a bunch of macro soup to fix this problem yourself and use strtoimax(), which defeats the entire point of the stdint types. 
And yes, atoi() is a thing for normal ints, but it's not useful if you need both for 0 to be a useful value and to detect parse errors, which is very common!
Get on it, @thephd. Love your blog by the way!