sbbs.el

(defun sbbs--parse-number-range (desc limit)
  "Generate list of numbers, as specified by DESC.

To avoid memory overflows, limit number of entries to LIMIT."
  (save-match-data
    (apply #'nconc
           (mapcar
            (lambda (range)
              (cond ((string-match "\\`\\([[:digit:]]+\\)-\\([[:digit:]]+\\)\\'" range)
                     (number-sequence (string-to-number (match-string 1 range))
                                      (min limit (string-to-number (match-string 2 range)))))
                    ((string-match "\\`\\([[:digit:]]+\\)\\'" range)
                     (list (string-to-number (match-string 1 range))))
                    (t (error "Invalid range"))))
            (split-string desc ",")))))

(defun sbbs--read-jump-to (nr)
  "Set point to first character of post with number NR."
  (let ((up (point-min)) (down (point-max)) current)
    (while (progn
             (goto-char (+ up (/ (- down up) 2)))
             (setq current (get-text-property (point) 'sbbs-thread-nr))