SQL & PL/SQL

I want to create a view based on a CSV clob. i have amended the csv to XML by using a new line character to split the row and use all commas as column seperators . this is fine apart from when there is a comma contained with a quoted string. what i want to know is how would i identify whether the comma was contained within quotes or not? below is a sample of the data i am using. as you can see not all strings are quoted, only those that contain commas.

aaa,bbb,"ccc,ccc"
ddd,"eee,eee",fff
ggg,"hh,hhh","iii,i"

any help would be appreciated