question about `(uint64_t) strtoll`

[eriksjolund]

When reading the source code file src/libcrun/cgroup-systemd.c I noticed the use of (uint64_t) strtoll

$  git grep "(uint64_t) strtoll " remotes/origin/main
remotes/origin/main:src/libcrun/cgroup-systemd.c:        *value = (uint64_t) strtoll (resources->unified->values[i], &endptr, 10);
remotes/origin/main:src/libcrun/cgroup-systemd.c:  *value = (uint64_t) strtoll (str, &endptr, 10);

crun/src/libcrun/cgroup-systemd.c

Line 822 in 46cedc0

*value = (uint64_t) strtoll (resources->unified->values[i], &endptr, 10);

crun/src/libcrun/cgroup-systemd.c

Line 932 in 46cedc0

*value = (uint64_t) strtoll (str, &endptr, 10);

I'm a bit lost here. There is also another function strtoull() that could be used without needing to cast.

Why is not strtoull() used instead?

I see that strtoull() is used in a few places already

$ git grep strtoull remotes/origin/main | wc -l
       4

I'll plan to also ask an AI, to see if I can figure this mystery out by myself. If so, I'll close this issue.

[giuseppe]

I don't think there is a particular reason beside it being a mistake :-)

[eriksjolund]

I created a PR #2162