-(defun edmacro-mismatch (cl-seq1 cl-seq2 cl-start1 cl-end1 cl-start2 cl-end2)
- "Compare SEQ1 with SEQ2, return index of first mismatching element.
-Return nil if the sequences match. If one sequence is a prefix of the
-other, the return value indicates the end of the shorted sequence.
-\n(fn SEQ1 SEQ2 START1 END1 START2 END2)"
- (or cl-end1 (setq cl-end1 (length cl-seq1)))
- (or cl-end2 (setq cl-end2 (length cl-seq2)))
- (let ((cl-p1 (and (listp cl-seq1) (nthcdr cl-start1 cl-seq1)))
- (cl-p2 (and (listp cl-seq2) (nthcdr cl-start2 cl-seq2))))
- (while (and (< cl-start1 cl-end1) (< cl-start2 cl-end2)
- (eql (if cl-p1 (car cl-p1)
- (aref cl-seq1 cl-start1))
- (if cl-p2 (car cl-p2)
- (aref cl-seq2 cl-start2))))
- (setq cl-p1 (cdr cl-p1) cl-p2 (cdr cl-p2)
- cl-start1 (1+ cl-start1) cl-start2 (1+ cl-start2)))
- (and (or (< cl-start1 cl-end1) (< cl-start2 cl-end2))
- cl-start1)))
-
-(defun edmacro-subseq (seq start &optional end)
- "Return the subsequence of SEQ from START to END.
-If END is omitted, it defaults to the length of the sequence.
-If START or END is negative, it counts from the end."
- (if (stringp seq) (substring seq start end)
- (let (len)
- (and end (< end 0) (setq end (+ end (setq len (length seq)))))
- (if (< start 0) (setq start (+ start (or len (setq len (length seq))))))
- (cond ((listp seq)
- (if (> start 0) (setq seq (nthcdr start seq)))
- (if end
- (let ((res nil))
- (while (>= (setq end (1- end)) start)
- (push (pop seq) res))
- (nreverse res))
- (copy-sequence seq)))
- (t
- (or end (setq end (or len (length seq))))
- (let ((res (make-vector (max (- end start) 0) nil))
- (i 0))
- (while (< start end)
- (aset res i (aref seq start))
- (setq i (1+ i) start (1+ start)))
- res))))))
-