refactor: extract common logic
-rwxr-xr-x 751 CMakeLists.txt
-rw-r--r-- 10251 LICENSE
-rw-r--r-- 31527 README
drwxr-xr-x - packaging
-rwxr-xr-x 87 test.sh
drwxr-xr-x - test
drwxr-xr-x - tzdata-parser