Function to import comma delimited rows

I need the following:

1. A simple form in which user selects a text file (spreadsheet nice to have)
2. The file will have rows. Each row would be comma delimited field
eg: 100,Dave,dave@dave.com
3. On submit, submit function will be called, submit function should do the following:
--> read each row from file
-----> for each row, split row into fields and insert to a table (You dont need to code this part, just dump it)

So I need 2 functions:

function bulk_import_form (&$form_state,$node,$content_node){
//form to select flat file, will have comma delimited strings
}

function bulk_import_form_submit (&$form_state,$node,$content_node){
//read the file
//loop thru each row
//split the fields of each row, and insert to db table
}

Please let me know your quote