how to set/retrieve data directory and index directory of a table of mysql database

[Frank Liu]

hi, everyone
i have a program needs to build and read schema information of mysql. there are several problems i still can not figure out. I hope I can get help here. My question are:

1.what kind engines support data directory when create a table of mysql?
2.what kind engines support index directory when create a table of mysql?
3.So far i only can retrieve data directory, how to retrieve index directory?

Thanks a lot