Function: nnvirtual-partition-sequence

nnvirtual-partition-sequence is a byte-compiled function defined in nnvirtual.el.gz.

Signature

(nnvirtual-partition-sequence ARTICLES)

Documentation

Return an association list of component article numbers.

These are indexed by elements of nnvirtual-component-groups, based on the sequence ARTICLES of virtual article numbers. ARTICLES should be sorted, and can be a compressed sequence. If any of the article numbers has no corresponding component article, then it is left out of the result.

Source Code

;; Defined in /usr/src/emacs/lisp/gnus/nnvirtual.el.gz
(defun nnvirtual-partition-sequence (articles)
  "Return an association list of component article numbers.
These are indexed by elements of `nnvirtual-component-groups', based on
the sequence ARTICLES of virtual article numbers.  ARTICLES should be
sorted, and can be a compressed sequence.  If any of the article
numbers has no corresponding component article, then it is left out of
the result."
  (when (numberp (cdr-safe articles))
    (setq articles (list articles)))
  (let ((carticles (mapcar #'list nnvirtual-component-groups))
	a i j article entry)
    (while (setq a (pop articles))
      (if (atom a)
	  (setq i a
		j a)
	(setq i (car a)
	      j (cdr a)))
      (while (<= i j)
	(when (setq article (nnvirtual-map-article i))
	  (setq entry (assoc (car article) carticles))
	  (setcdr entry (cons (cdr article) (cdr entry))))
	(setq i (1+ i))))
    (mapc (lambda (x) (setcdr x (nreverse (cdr x))))
	  carticles)
    carticles))