Dear Hans,

I saw the C code of LuaMetaTeX and I saw a lot of gotos which is not good
coding practice. These potions of code which have goto should be refactored.

I am a C programmer, but I know very little of TeX. If you can point me
towards where should I start for TeX(perhaps TeX Book or TeX for the
Impatient), I can help with refactoring of code to make is more
efficient/easier.

-- 
Respect,
Shiv Shankar Dayal