Scieneer Common Lisp 1.3.9 online documentation

read-sequence seq stream &key start end[Function]

Destructively modify seq by reading elements from stream. The seq is bounded by start and end, and is destructively modified by copying successive elements into it from stream. If the end of file is reached before copying all elements of the subsequence, then the extra elements near the end of sequence are not updated, and the index of the next element is returned.