Optimizing Csv to Field Table

[Billy <spooky_loco_pv@...>]

Anyone know how i can optimize this? Or if i even wrote this correctly. I wanted
to create a function that would return the table corresponding with the fields
that the csv was created

fromCSV function can be found at http://lua-users.org/wiki/CsvUtils

-- Converts CSV file to a Field Table
-- example
-- Name,Class,FormID
-- Warrior,CombatWarrior1H,0005003
-- Archer,CombatArcher,0005002
-- returns {
-- [1] = { Name = Warrior, Class = CombatWarrior1H, FormID = 0005003 },
-- [2] = { Name = Archer, Class = CombatArcher, FormID = 0005002}
-- }
function CSVToTable(file_in)
        local t = {}
        local lineCount = 1
        local count = 1

        local fieldCount = 0
        local fields = {}
        for line in io.lines(file_in) do
                local csv = fromCSV(line)
                if lineCount == 1 then
                        fieldCount = #csv
                        if fieldCount == 0 then -- incase table size is nil,
lets recount
                                for k,v in pairs(csv) do
                                        fieldCount = fieldCount + 1
                                end
                        else
                                for k,v in pairs(csv) do
                                        fields[k] = Trim(v)
                                end
                        end
                else
                        if not t[count] then
                                t[count] = {}
                        end
                        for k,v in pairs(csv) do
                                t[count][fields[k]] = csv[k]
                        end
                        count = count + 1
                end


                lineCount = lineCount + 1
        end
		return t
end