;;; nnheader.el --- header access macros for Gnus and its backends
;; Copyright (C) 1987, 1988, 1989, 1990, 1993, 1994, 1995, 1996,
-;; 1997, 1998, 2000, 2001
+;; 1997, 1998, 2000, 2001, 2002
;; Free Software Foundation, Inc.
;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
-;; Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news
;; This file is part of GNU Emacs.
(eval-and-compile
(autoload 'gnus-sorted-intersection "gnus-range")
(autoload 'gnus-intersection "gnus-range")
- (autoload 'gnus-sorted-complement "gnus-range"))
+ (autoload 'gnus-sorted-complement "gnus-range")
+ (autoload 'gnus-sorted-difference "gnus-range"))
(defcustom gnus-verbose-backends 7
"Integer that says how verbose the Gnus backends should be.
(delete-char 1))
(forward-line 1)))
+(defun nnheader-parse-overview-file (file)
+ "Parse FILE and return a list of headers."
+ (mm-with-unibyte-buffer
+ (nnheader-insert-file-contents file)
+ (goto-char (point-min))
+ (let (headers)
+ (while (not (eobp))
+ (push (nnheader-parse-nov) headers)
+ (forward-line 1))
+ (nreverse headers))))
+
+(defun nnheader-write-overview-file (file headers)
+ "Write HEADERS to FILE."
+ (with-temp-file file
+ (mapcar 'nnheader-insert-nov headers)))
+
(defun nnheader-insert-header (header)
(insert
"Subject: " (or (mail-header-subject header) "(none)") "\n"
(let ((coding-system-for-read nnheader-file-coding-system))
(mm-insert-file-contents filename visit beg end replace)))
+(defun nnheader-insert-nov-file (file first)
+ (let ((size (nth 7 (file-attributes file)))
+ (cutoff (* 32 1024)))
+ (if (< size cutoff)
+ ;; If the file is small, we just load it.
+ (nnheader-insert-file-contents file)
+ ;; We start on the assumption that FIRST is pretty recent. If
+ ;; not, we just insert the rest of the file as well.
+ (let (current)
+ (nnheader-insert-file-contents file nil (- size cutoff) size)
+ (goto-char (point-min))
+ (delete-region (point) (or (search-forward "\n" nil 'move) (point)))
+ (setq current (ignore-errors (read (current-buffer))))
+ (if (and (numberp current)
+ (< current first))
+ t
+ (delete-region (point-min) (point-max))
+ (nnheader-insert-file-contents file))))))
+
(defun nnheader-find-file-noselect (&rest args)
(let ((format-alist nil)
(auto-mode-alist (mm-auto-mode-alist))