[tsuyoshi]

I wrote this for parsing CSV in Awk: http://yumegakanau.org/code/awk-csv/ It maybe doesn't handle all the CSV out there, but the cases you mention (quoting and commas) it does handle.

I usually load CSV data into PostgreSQL to do anything with it; mostly wrote this Awk library for fun. So I'm not going to argue that Awk is the best language for doing this kind of thing, but it is possible.