codecalc-exec-0.6.0 is not a library.
codecalc-exec — sandboxed multi-language executor.
Reads source code on stdin, executes it in the requested language inside a fresh temp dir (or a caller-supplied --workdir) with rlimits + wall-clock timeout + process-group kill, prints a JSON result on stdout.
Usage: codecalc-exec --lang [--timeout ] [--stdin ] [--stdin-file ] [--workdir ] [--max-memory-mb ] [--max-output-kb ] [--max-cpu ] [--no-net] < code
This is the security-sensitive core: written in Rust so no user input is ever evaluated/interpreted by the host process — it only spawns children with OS-enforced resource limits.