Ruby regex matcher

gistfile1.rb

def match(regexp, text)
    if (regexp.nil? or regexp.empty?) or (regexp[0..0] == '$' and text.empty?) then return true end
    if regexp[0..0] == '^' then return match(regexp[1..regexp.size-1], text) end
    if regexp[0..0] == '*' then return match(regexp[2..regexp.size-1], text[star(regexp[1..1], text)..text.size-1]) end
    if text[0..0] == regexp[0..0] or regexp[0..0] == '.' then return match(regexp[1..regexp.size-1], text[1..text.size-1]) end 
    false
end

def star(char, text, count=0)
    if char == text[0..0]
        count += 1
        return matchstar(char, text[1..text.size-1], count)
    end
    count
end