For example functions that I guess are meant to be generic arrays that take int*. You could write volumes on how to approach generic arrays in C but this is certainly not one of them.
Also the use of "c standard library" is weird here. Any C programmer reading this phrase assumes a reasonably standard conformant libc. This is a bunch of interfaces the author made up.
Sorry for being negative but this doesn't pass a "production quality c code" at-a-distance sniff test.