[NTG-context] LuaMetaTeX code

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