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df359f6c5b
* nnheader.el (nnheader-parse-head): Try both "from:" and "from: ". 2000-10-03 Bjorn Torkelsson <torkel@hpc2n.umu.se> * uudecode.el: xemacs cleanup (use featurep ' xemacs) * nnheader.el: ditto
910 lines
28 KiB
EmacsLisp
910 lines
28 KiB
EmacsLisp
;;; nnheader.el --- header access macros for Gnus and its backends
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;; Copyright (C) 1987, 1988, 1989, 1990, 1993, 1994, 1995, 1996,
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;; 1997, 1998, 2000
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;; Free Software Foundation, Inc.
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;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
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;; Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; Maintainer: bugs@gnus.org
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;; Keywords: news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'mail-utils)
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(require 'mm-util)
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(defvar nnheader-max-head-length 4096
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"*Max length of the head of articles.")
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(defvar nnheader-head-chop-length 2048
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"*Length of each read operation when trying to fetch HEAD headers.")
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(defvar nnheader-file-name-translation-alist nil
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"*Alist that says how to translate characters in file names.
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For instance, if \":\" is invalid as a file character in file names
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on your system, you could say something like:
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\(setq nnheader-file-name-translation-alist '((?: . ?_)))")
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(eval-and-compile
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(autoload 'nnmail-message-id "nnmail")
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(autoload 'mail-position-on-field "sendmail")
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(autoload 'message-remove-header "message")
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(autoload 'gnus-point-at-eol "gnus-util")
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(autoload 'gnus-delete-line "gnus-util")
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(autoload 'gnus-buffer-live-p "gnus-util"))
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;;; Header access macros.
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;; These macros may look very much like the ones in GNUS 4.1. They
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;; are, in a way, but you should note that the indices they use have
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;; been changed from the internal GNUS format to the NOV format. The
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;; makes it possible to read headers from XOVER much faster.
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;;
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;; The format of a header is now:
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;; [number subject from date id references chars lines xref extra]
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;;
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;; (That next-to-last entry is defined as "misc" in the NOV format,
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;; but Gnus uses it for xrefs.)
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(defmacro mail-header-number (header)
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"Return article number in HEADER."
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`(aref ,header 0))
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(defmacro mail-header-set-number (header number)
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"Set article number of HEADER to NUMBER."
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`(aset ,header 0 ,number))
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(defmacro mail-header-subject (header)
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"Return subject string in HEADER."
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`(aref ,header 1))
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(defmacro mail-header-set-subject (header subject)
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"Set article subject of HEADER to SUBJECT."
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`(aset ,header 1 ,subject))
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(defmacro mail-header-from (header)
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"Return author string in HEADER."
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`(aref ,header 2))
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(defmacro mail-header-set-from (header from)
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"Set article author of HEADER to FROM."
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`(aset ,header 2 ,from))
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(defmacro mail-header-date (header)
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"Return date in HEADER."
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`(aref ,header 3))
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(defmacro mail-header-set-date (header date)
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"Set article date of HEADER to DATE."
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`(aset ,header 3 ,date))
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(defalias 'mail-header-message-id 'mail-header-id)
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(defmacro mail-header-id (header)
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"Return Id in HEADER."
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`(aref ,header 4))
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(defalias 'mail-header-set-message-id 'mail-header-set-id)
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(defmacro mail-header-set-id (header id)
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"Set article Id of HEADER to ID."
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`(aset ,header 4 ,id))
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(defmacro mail-header-references (header)
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"Return references in HEADER."
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`(aref ,header 5))
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(defmacro mail-header-set-references (header ref)
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"Set article references of HEADER to REF."
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`(aset ,header 5 ,ref))
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(defmacro mail-header-chars (header)
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"Return number of chars of article in HEADER."
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`(aref ,header 6))
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(defmacro mail-header-set-chars (header chars)
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"Set number of chars in article of HEADER to CHARS."
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`(aset ,header 6 ,chars))
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(defmacro mail-header-lines (header)
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"Return lines in HEADER."
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`(aref ,header 7))
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(defmacro mail-header-set-lines (header lines)
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"Set article lines of HEADER to LINES."
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`(aset ,header 7 ,lines))
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(defmacro mail-header-xref (header)
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"Return xref string in HEADER."
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`(aref ,header 8))
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(defmacro mail-header-set-xref (header xref)
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"Set article XREF of HEADER to xref."
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`(aset ,header 8 ,xref))
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(defmacro mail-header-extra (header)
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"Return the extra headers in HEADER."
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`(aref ,header 9))
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(defmacro mail-header-set-extra (header extra)
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"Set the extra headers in HEADER to EXTRA."
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`(aset ,header 9 ',extra))
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(defsubst make-mail-header (&optional init)
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"Create a new mail header structure initialized with INIT."
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(make-vector 10 init))
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(defsubst make-full-mail-header (&optional number subject from date id
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references chars lines xref
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extra)
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"Create a new mail header structure initialized with the parameters given."
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(vector number subject from date id references chars lines xref extra))
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;; fake message-ids: generation and detection
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(defvar nnheader-fake-message-id 1)
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(defsubst nnheader-generate-fake-message-id ()
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(concat "fake+none+" (int-to-string (incf nnheader-fake-message-id))))
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(defsubst nnheader-fake-message-id-p (id)
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(save-match-data ; regular message-id's are <.*>
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(string-match "\\`fake\\+none\\+[0-9]+\\'" id)))
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;; Parsing headers and NOV lines.
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(defsubst nnheader-header-value ()
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(buffer-substring (match-end 0) (gnus-point-at-eol)))
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(defun nnheader-parse-head (&optional naked)
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(let ((case-fold-search t)
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(cur (current-buffer))
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(buffer-read-only nil)
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in-reply-to lines p ref)
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(goto-char (point-min))
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(when naked
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(insert "\n"))
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;; Search to the beginning of the next header. Error messages
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;; do not begin with 2 or 3.
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(prog1
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(when (or naked (re-search-forward "^[23][0-9]+ " nil t))
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;; This implementation of this function, with nine
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;; search-forwards instead of the one re-search-forward and
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;; a case (which basically was the old function) is actually
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;; about twice as fast, even though it looks messier. You
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;; can't have everything, I guess. Speed and elegance
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;; don't always go hand in hand.
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(vector
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;; Number.
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(if naked
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(progn
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(setq p (point-min))
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0)
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(prog1
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(read cur)
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(end-of-line)
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(setq p (point))
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(narrow-to-region (point)
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(or (and (search-forward "\n.\n" nil t)
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(- (point) 2))
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(point)))))
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;; Subject.
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(progn
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(goto-char p)
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(if (search-forward "\nsubject: " nil t)
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(nnheader-header-value) "(none)"))
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;; From.
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(progn
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(goto-char p)
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(if (or (search-forward "\nfrom: " nil t)
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(search-forward "\nfrom:" nil t))
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(nnheader-header-value) "(nobody)"))
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;; Date.
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(progn
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(goto-char p)
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(if (search-forward "\ndate: " nil t)
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(nnheader-header-value) ""))
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;; Message-ID.
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(progn
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(goto-char p)
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(if (search-forward "\nmessage-id:" nil t)
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(buffer-substring
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(1- (or (search-forward "<" (gnus-point-at-eol) t)
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(point)))
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(or (search-forward ">" (gnus-point-at-eol) t) (point)))
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;; If there was no message-id, we just fake one to make
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;; subsequent routines simpler.
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(nnheader-generate-fake-message-id)))
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;; References.
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(progn
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(goto-char p)
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(if (search-forward "\nreferences: " nil t)
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(nnheader-header-value)
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;; Get the references from the in-reply-to header if there
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;; were no references and the in-reply-to header looks
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;; promising.
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(if (and (search-forward "\nin-reply-to: " nil t)
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(setq in-reply-to (nnheader-header-value))
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(string-match "<[^\n>]+>" in-reply-to))
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(let (ref2)
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(setq ref (substring in-reply-to (match-beginning 0)
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(match-end 0)))
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(while (string-match "<[^\n>]+>"
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in-reply-to (match-end 0))
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(setq ref2 (substring in-reply-to (match-beginning 0)
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(match-end 0)))
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(when (> (length ref2) (length ref))
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(setq ref ref2)))
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ref)
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nil)))
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;; Chars.
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0
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;; Lines.
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(progn
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(goto-char p)
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(if (search-forward "\nlines: " nil t)
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(if (numberp (setq lines (read cur)))
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lines 0)
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0))
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;; Xref.
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(progn
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(goto-char p)
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(and (search-forward "\nxref: " nil t)
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(nnheader-header-value)))
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;; Extra.
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(when nnmail-extra-headers
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(let ((extra nnmail-extra-headers)
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out)
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(while extra
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(goto-char p)
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(when (search-forward
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(concat "\n" (symbol-name (car extra)) ": ") nil t)
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(push (cons (car extra) (nnheader-header-value))
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out))
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(pop extra))
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out))))
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(when naked
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(goto-char (point-min))
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(delete-char 1)))))
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(defmacro nnheader-nov-skip-field ()
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'(search-forward "\t" eol 'move))
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(defmacro nnheader-nov-field ()
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'(buffer-substring (point) (if (nnheader-nov-skip-field) (1- (point)) eol)))
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(defmacro nnheader-nov-read-integer ()
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'(prog1
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(if (eq (char-after) ?\t)
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0
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(let ((num (condition-case nil
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(read (current-buffer))
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(error nil))))
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(if (numberp num) num 0)))
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(or (eobp) (forward-char 1))))
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(defmacro nnheader-nov-parse-extra ()
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'(let (out string)
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(while (not (memq (char-after) '(?\n nil)))
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(setq string (nnheader-nov-field))
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(when (string-match "^\\([^ :]+\\): " string)
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(push (cons (intern (match-string 1 string))
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(substring string (match-end 0)))
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out)))
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out))
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(defmacro nnheader-nov-read-message-id ()
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'(let ((id (nnheader-nov-field)))
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(if (string-match "^<[^>]+>$" id)
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id
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(nnheader-generate-fake-message-id))))
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(defun nnheader-parse-nov ()
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(let ((eol (gnus-point-at-eol)))
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(vector
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(nnheader-nov-read-integer) ; number
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(nnheader-nov-field) ; subject
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(nnheader-nov-field) ; from
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(nnheader-nov-field) ; date
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(nnheader-nov-read-message-id) ; id
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(nnheader-nov-field) ; refs
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(nnheader-nov-read-integer) ; chars
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(nnheader-nov-read-integer) ; lines
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(if (eq (char-after) ?\n)
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nil
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(if (looking-at "Xref: ")
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(goto-char (match-end 0)))
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(nnheader-nov-field)) ; Xref
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(nnheader-nov-parse-extra)))) ; extra
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(defun nnheader-insert-nov (header)
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(princ (mail-header-number header) (current-buffer))
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(let ((p (point)))
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(insert
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"\t"
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(or (mail-header-subject header) "(none)") "\t"
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(or (mail-header-from header) "(nobody)") "\t"
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(or (mail-header-date header) "") "\t"
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(or (mail-header-id header)
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(nnmail-message-id))
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"\t"
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(or (mail-header-references header) "") "\t")
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(princ (or (mail-header-chars header) 0) (current-buffer))
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(insert "\t")
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(princ (or (mail-header-lines header) 0) (current-buffer))
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(insert "\t")
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(when (mail-header-xref header)
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(insert "Xref: " (mail-header-xref header)))
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(when (or (mail-header-xref header)
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(mail-header-extra header))
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(insert "\t"))
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(when (mail-header-extra header)
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(let ((extra (mail-header-extra header)))
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(while extra
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(insert (symbol-name (caar extra))
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": " (cdar extra) "\t")
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(pop extra))))
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(insert "\n")
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(backward-char 1)
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(while (search-backward "\n" p t)
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(delete-char 1))
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(forward-line 1)))
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(defun nnheader-insert-header (header)
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(insert
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"Subject: " (or (mail-header-subject header) "(none)") "\n"
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"From: " (or (mail-header-from header) "(nobody)") "\n"
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"Date: " (or (mail-header-date header) "") "\n"
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"Message-ID: " (or (mail-header-id header) (nnmail-message-id)) "\n"
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"References: " (or (mail-header-references header) "") "\n"
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"Lines: ")
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(princ (or (mail-header-lines header) 0) (current-buffer))
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(insert "\n\n"))
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(defun nnheader-insert-article-line (article)
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(goto-char (point-min))
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(insert "220 ")
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(princ article (current-buffer))
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(insert " Article retrieved.\n")
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(search-forward "\n\n" nil 'move)
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(delete-region (point) (point-max))
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(forward-char -1)
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(insert "."))
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(defun nnheader-nov-delete-outside-range (beg end)
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"Delete all NOV lines that lie outside the BEG to END range."
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;; First we find the first wanted line.
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(nnheader-find-nov-line beg)
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(delete-region (point-min) (point))
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;; Then we find the last wanted line.
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(when (nnheader-find-nov-line end)
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(forward-line 1))
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(delete-region (point) (point-max)))
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(defun nnheader-find-nov-line (article)
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"Put point at the NOV line that start with ARTICLE.
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If ARTICLE doesn't exist, put point where that line
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would have been. The function will return non-nil if
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the line could be found."
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;; This function basically does a binary search.
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(let ((max (point-max))
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(min (goto-char (point-min)))
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(cur (current-buffer))
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(prev (point-min))
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num found)
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(while (not found)
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(goto-char (/ (+ max min) 2))
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(beginning-of-line)
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(if (or (= (point) prev)
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(eobp))
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(setq found t)
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(setq prev (point))
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(while (and (not (numberp (setq num (read cur))))
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(not (eobp)))
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(gnus-delete-line))
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(cond ((> num article)
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(setq max (point)))
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((< num article)
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(setq min (point)))
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(t
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(setq found 'yes)))))
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;; We may be at the first line.
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(when (and (not num)
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(not (eobp)))
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(setq num (read cur)))
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;; Now we may have found the article we're looking for, or we
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;; may be somewhere near it.
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(when (and (not (eq found 'yes))
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(not (eq num article)))
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(setq found (point))
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(while (and (< (point) max)
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(or (not (numberp num))
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(< num article)))
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(forward-line 1)
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(setq found (point))
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(or (eobp)
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(= (setq num (read cur)) article)))
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(unless (eq num article)
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(goto-char found)))
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(beginning-of-line)
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(eq num article)))
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;; Various cruft the backends and Gnus need to communicate.
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(defvar nntp-server-buffer nil)
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(defvar gnus-verbose-backends 7
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"*A number that says how talkative the Gnus backends should be.")
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(defvar gnus-nov-is-evil nil
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"If non-nil, Gnus backends will never output headers in the NOV format.")
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(defvar news-reply-yank-from nil)
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(defvar news-reply-yank-message-id nil)
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(defvar nnheader-callback-function nil)
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(defun nnheader-init-server-buffer ()
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"Initialize the Gnus-backend communication buffer."
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(save-excursion
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(unless (gnus-buffer-live-p nntp-server-buffer)
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(setq nntp-server-buffer (get-buffer-create " *nntpd*")))
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(mm-enable-multibyte)
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(set-buffer nntp-server-buffer)
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(erase-buffer)
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(kill-all-local-variables)
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(setq case-fold-search t) ;Should ignore case.
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t))
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;;; Various functions the backends use.
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(defun nnheader-file-error (file)
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"Return a string that says what is wrong with FILE."
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(format
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(cond
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((not (file-exists-p file))
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"%s does not exist")
|
|
((file-directory-p file)
|
|
"%s is a directory")
|
|
((not (file-readable-p file))
|
|
"%s is not readable"))
|
|
file))
|
|
|
|
(defun nnheader-insert-head (file)
|
|
"Insert the head of the article."
|
|
(when (file-exists-p file)
|
|
(if (eq nnheader-max-head-length t)
|
|
;; Just read the entire file.
|
|
(nnheader-insert-file-contents file)
|
|
;; Read 1K blocks until we find a separator.
|
|
(let ((beg 0)
|
|
format-alist)
|
|
(while (and (eq nnheader-head-chop-length
|
|
(nth 1 (nnheader-insert-file-contents
|
|
file nil beg
|
|
(incf beg nnheader-head-chop-length))))
|
|
(prog1 (not (search-forward "\n\n" nil t))
|
|
(goto-char (point-max)))
|
|
(or (null nnheader-max-head-length)
|
|
(< beg nnheader-max-head-length))))))
|
|
t))
|
|
|
|
(defun nnheader-article-p ()
|
|
"Say whether the current buffer looks like an article."
|
|
(goto-char (point-min))
|
|
(if (not (search-forward "\n\n" nil t))
|
|
nil
|
|
(narrow-to-region (point-min) (1- (point)))
|
|
(goto-char (point-min))
|
|
(while (looking-at "[a-zA-Z][^ \t]+:.*\n\\([ \t].*\n\\)*\\|From .*\n")
|
|
(goto-char (match-end 0)))
|
|
(prog1
|
|
(eobp)
|
|
(widen))))
|
|
|
|
(defun nnheader-insert-references (references message-id)
|
|
"Insert a References header based on REFERENCES and MESSAGE-ID."
|
|
(if (and (not references) (not message-id))
|
|
;; This is invalid, but not all articles have Message-IDs.
|
|
()
|
|
(mail-position-on-field "References")
|
|
(let ((begin (save-excursion (beginning-of-line) (point)))
|
|
(fill-column 78)
|
|
(fill-prefix "\t"))
|
|
(when references
|
|
(insert references))
|
|
(when (and references message-id)
|
|
(insert " "))
|
|
(when message-id
|
|
(insert message-id))
|
|
;; Fold long References lines to conform to RFC1036 (sort of).
|
|
;; The region must end with a newline to fill the region
|
|
;; without inserting extra newline.
|
|
(fill-region-as-paragraph begin (1+ (point))))))
|
|
|
|
(defun nnheader-replace-header (header new-value)
|
|
"Remove HEADER and insert the NEW-VALUE."
|
|
(save-excursion
|
|
(save-restriction
|
|
(nnheader-narrow-to-headers)
|
|
(prog1
|
|
(message-remove-header header)
|
|
(goto-char (point-max))
|
|
(insert header ": " new-value "\n")))))
|
|
|
|
(defun nnheader-narrow-to-headers ()
|
|
"Narrow to the head of an article."
|
|
(widen)
|
|
(narrow-to-region
|
|
(goto-char (point-min))
|
|
(if (search-forward "\n\n" nil t)
|
|
(1- (point))
|
|
(point-max)))
|
|
(goto-char (point-min)))
|
|
|
|
(defun nnheader-set-temp-buffer (name &optional noerase)
|
|
"Set-buffer to an empty (possibly new) buffer called NAME with undo disabled."
|
|
(set-buffer (get-buffer-create name))
|
|
(buffer-disable-undo)
|
|
(unless noerase
|
|
(erase-buffer))
|
|
(current-buffer))
|
|
|
|
(eval-when-compile (defvar jka-compr-compression-info-list))
|
|
(defvar nnheader-numerical-files
|
|
(if (boundp 'jka-compr-compression-info-list)
|
|
(concat "\\([0-9]+\\)\\("
|
|
(mapconcat (lambda (i) (aref i 0))
|
|
jka-compr-compression-info-list "\\|")
|
|
"\\)?")
|
|
"[0-9]+$")
|
|
"Regexp that match numerical files.")
|
|
|
|
(defvar nnheader-numerical-short-files (concat "^" nnheader-numerical-files)
|
|
"Regexp that matches numerical file names.")
|
|
|
|
(defvar nnheader-numerical-full-files (concat "/" nnheader-numerical-files)
|
|
"Regexp that matches numerical full file paths.")
|
|
|
|
(defsubst nnheader-file-to-number (file)
|
|
"Take a FILE name and return the article number."
|
|
(if (string= nnheader-numerical-short-files "^[0-9]+$")
|
|
(string-to-int file)
|
|
(string-match nnheader-numerical-short-files file)
|
|
(string-to-int (match-string 0 file))))
|
|
|
|
(defun nnheader-directory-files-safe (&rest args)
|
|
;; It has been reported numerous times that `directory-files'
|
|
;; fails with an alarming frequency on NFS mounted file systems.
|
|
;; This function executes that function twice and returns
|
|
;; the longest result.
|
|
(let ((first (apply 'directory-files args))
|
|
(second (apply 'directory-files args)))
|
|
(if (> (length first) (length second))
|
|
first
|
|
second)))
|
|
|
|
(defun nnheader-directory-articles (dir)
|
|
"Return a list of all article files in directory DIR."
|
|
(mapcar 'nnheader-file-to-number
|
|
(nnheader-directory-files-safe
|
|
dir nil nnheader-numerical-short-files t)))
|
|
|
|
(defun nnheader-article-to-file-alist (dir)
|
|
"Return an alist of article/file pairs in DIR."
|
|
(mapcar (lambda (file) (cons (nnheader-file-to-number file) file))
|
|
(nnheader-directory-files-safe
|
|
dir nil nnheader-numerical-short-files t)))
|
|
|
|
(defun nnheader-fold-continuation-lines ()
|
|
"Fold continuation lines in the current buffer."
|
|
(nnheader-replace-regexp "\\(\r?\n[ \t]+\\)+" " "))
|
|
|
|
(defun nnheader-translate-file-chars (file &optional full)
|
|
"Translate FILE into something that can be a file name.
|
|
If FULL, translate everything."
|
|
(if (null nnheader-file-name-translation-alist)
|
|
;; No translation is necessary.
|
|
file
|
|
(let* ((i 0)
|
|
trans leaf path len)
|
|
(if full
|
|
;; Do complete translation.
|
|
(setq leaf (copy-sequence file)
|
|
path ""
|
|
i (if (and (< 1 (length leaf)) (eq ?: (aref leaf 1)))
|
|
2 0))
|
|
;; We translate -- but only the file name. We leave the directory
|
|
;; alone.
|
|
(if (and (featurep 'xemacs)
|
|
(memq system-type '(win32 w32 mswindows windows-nt)))
|
|
;; This is needed on NT and stuff, because
|
|
;; file-name-nondirectory is not enough to split
|
|
;; file names, containing ':', e.g.
|
|
;; "d:\\Work\\News\\nntp+news.fido7.ru:fido7.ru.gnu.SCORE"
|
|
;;
|
|
;; we are trying to correctly split such names:
|
|
;; "d:file.name" -> "a:" "file.name"
|
|
;; "aaa:bbb.ccc" -> "" "aaa:bbb.ccc"
|
|
;; "d:aaa\\bbb:ccc" -> "d:aaa\\" "bbb:ccc"
|
|
;; etc.
|
|
;; to translate then only the file name part.
|
|
(progn
|
|
(setq leaf file
|
|
path "")
|
|
(if (string-match "\\(^\\w:\\|[/\\]\\)\\([^/\\]+\\)$" file)
|
|
(setq leaf (substring file (match-beginning 2))
|
|
path (substring file 0 (match-beginning 2)))))
|
|
;; Emacs DTRT, says andrewi.
|
|
(setq leaf (file-name-nondirectory file)
|
|
path (file-name-directory file))))
|
|
(setq len (length leaf))
|
|
(while (< i len)
|
|
(when (setq trans (cdr (assq (aref leaf i)
|
|
nnheader-file-name-translation-alist)))
|
|
(aset leaf i trans))
|
|
(incf i))
|
|
(concat path leaf))))
|
|
|
|
(defun nnheader-report (backend &rest args)
|
|
"Report an error from the BACKEND.
|
|
The first string in ARGS can be a format string."
|
|
(set (intern (format "%s-status-string" backend))
|
|
(if (< (length args) 2)
|
|
(car args)
|
|
(apply 'format args)))
|
|
nil)
|
|
|
|
(defun nnheader-get-report (backend)
|
|
"Get the most recent report from BACKEND."
|
|
(condition-case ()
|
|
(nnheader-message 5 "%s" (symbol-value (intern (format "%s-status-string"
|
|
backend))))
|
|
(error (nnheader-message 5 ""))))
|
|
|
|
(defun nnheader-insert (format &rest args)
|
|
"Clear the communication buffer and insert FORMAT and ARGS into the buffer.
|
|
If FORMAT isn't a format string, it and all ARGS will be inserted
|
|
without formatting."
|
|
(save-excursion
|
|
(set-buffer nntp-server-buffer)
|
|
(erase-buffer)
|
|
(if (string-match "%" format)
|
|
(insert (apply 'format format args))
|
|
(apply 'insert format args))
|
|
t))
|
|
|
|
(if (fboundp 'subst-char-in-string)
|
|
(defsubst nnheader-replace-chars-in-string (string from to)
|
|
(subst-char-in-string from to string))
|
|
(defun nnheader-replace-chars-in-string (string from to)
|
|
"Replace characters in STRING from FROM to TO."
|
|
(let ((string (substring string 0)) ;Copy string.
|
|
(len (length string))
|
|
(idx 0))
|
|
;; Replace all occurrences of FROM with TO.
|
|
(while (< idx len)
|
|
(when (= (aref string idx) from)
|
|
(aset string idx to))
|
|
(setq idx (1+ idx)))
|
|
string)))
|
|
|
|
(defun nnheader-replace-duplicate-chars-in-string (string from to)
|
|
"Replace characters in STRING from FROM to TO."
|
|
(let ((string (substring string 0)) ;Copy string.
|
|
(len (length string))
|
|
(idx 0) prev i)
|
|
;; Replace all occurrences of FROM with TO.
|
|
(while (< idx len)
|
|
(setq i (aref string idx))
|
|
(when (and (eq prev from) (= i from))
|
|
(aset string (1- idx) to)
|
|
(aset string idx to))
|
|
(setq prev i)
|
|
(setq idx (1+ idx)))
|
|
string))
|
|
|
|
(defun nnheader-file-to-group (file &optional top)
|
|
"Return a group name based on FILE and TOP."
|
|
(nnheader-replace-chars-in-string
|
|
(if (not top)
|
|
file
|
|
(condition-case ()
|
|
(substring (expand-file-name file)
|
|
(length
|
|
(expand-file-name
|
|
(file-name-as-directory top))))
|
|
(error "")))
|
|
?/ ?.))
|
|
|
|
(defun nnheader-message (level &rest args)
|
|
"Message if the Gnus backends are talkative."
|
|
(if (or (not (numberp gnus-verbose-backends))
|
|
(<= level gnus-verbose-backends))
|
|
(apply 'message args)
|
|
(apply 'format args)))
|
|
|
|
(defun nnheader-be-verbose (level)
|
|
"Return whether the backends should be verbose on LEVEL."
|
|
(or (not (numberp gnus-verbose-backends))
|
|
(<= level gnus-verbose-backends)))
|
|
|
|
(defvar nnheader-pathname-coding-system 'binary
|
|
"*Coding system for pathname.")
|
|
|
|
(defun nnheader-group-pathname (group dir &optional file)
|
|
"Make pathname for GROUP."
|
|
(concat
|
|
(let ((dir (file-name-as-directory (expand-file-name dir))))
|
|
;; If this directory exists, we use it directly.
|
|
(file-name-as-directory
|
|
(if (file-directory-p (concat dir group))
|
|
(expand-file-name group dir)
|
|
;; If not, we translate dots into slashes.
|
|
(expand-file-name (mm-encode-coding-string
|
|
(nnheader-replace-chars-in-string group ?. ?/)
|
|
nnheader-pathname-coding-system)
|
|
dir))))
|
|
(cond ((null file) "")
|
|
((numberp file) (int-to-string file))
|
|
(t file))))
|
|
|
|
(defun nnheader-functionp (form)
|
|
"Return non-nil if FORM is funcallable."
|
|
(or (and (symbolp form) (fboundp form))
|
|
(and (listp form) (eq (car form) 'lambda))))
|
|
|
|
(defun nnheader-concat (dir &rest files)
|
|
"Concat DIR as directory to FILES."
|
|
(apply 'concat (file-name-as-directory dir) files))
|
|
|
|
(defun nnheader-ms-strip-cr ()
|
|
"Strip ^M from the end of all lines."
|
|
(save-excursion
|
|
(goto-char (point-min))
|
|
(while (re-search-forward "\r$" nil t)
|
|
(delete-backward-char 1))))
|
|
|
|
(defun nnheader-file-size (file)
|
|
"Return the file size of FILE or 0."
|
|
(or (nth 7 (file-attributes file)) 0))
|
|
|
|
(defun nnheader-find-etc-directory (package &optional file)
|
|
"Go through the path and find the \".../etc/PACKAGE\" directory.
|
|
If FILE, find the \".../etc/PACKAGE\" file instead."
|
|
(let ((path load-path)
|
|
dir result)
|
|
;; We try to find the dir by looking at the load path,
|
|
;; stripping away the last component and adding "etc/".
|
|
(while path
|
|
(if (and (car path)
|
|
(file-exists-p
|
|
(setq dir (concat
|
|
(file-name-directory
|
|
(directory-file-name (car path)))
|
|
"etc/" package
|
|
(if file "" "/"))))
|
|
(or file (file-directory-p dir)))
|
|
(setq result dir
|
|
path nil)
|
|
(setq path (cdr path))))
|
|
result))
|
|
|
|
(defvar ange-ftp-path-format)
|
|
(defvar efs-path-regexp)
|
|
(defun nnheader-re-read-dir (path)
|
|
"Re-read directory PATH if PATH is on a remote system."
|
|
(if (and (fboundp 'efs-re-read-dir) (boundp 'efs-path-regexp))
|
|
(when (string-match efs-path-regexp path)
|
|
(efs-re-read-dir path))
|
|
(when (and (fboundp 'ange-ftp-re-read-dir) (boundp 'ange-ftp-path-format))
|
|
(when (string-match (car ange-ftp-path-format) path)
|
|
(ange-ftp-re-read-dir path)))))
|
|
|
|
(defvar nnheader-file-coding-system 'raw-text
|
|
"Coding system used in file backends of Gnus.")
|
|
|
|
(defun nnheader-insert-file-contents (filename &optional visit beg end replace)
|
|
"Like `insert-file-contents', q.v., but only reads in the file.
|
|
A buffer may be modified in several ways after reading into the buffer due
|
|
to advanced Emacs features, such as file-name-handlers, format decoding,
|
|
find-file-hooks, etc.
|
|
This function ensures that none of these modifications will take place."
|
|
(let ((coding-system-for-read nnheader-file-coding-system))
|
|
(mm-insert-file-contents filename visit beg end replace)))
|
|
|
|
(defun nnheader-find-file-noselect (&rest args)
|
|
(let ((format-alist nil)
|
|
(auto-mode-alist (mm-auto-mode-alist))
|
|
(default-major-mode 'fundamental-mode)
|
|
(enable-local-variables nil)
|
|
(after-insert-file-functions nil)
|
|
(enable-local-eval nil)
|
|
(find-file-hooks nil)
|
|
(coding-system-for-read nnheader-file-coding-system))
|
|
(apply 'find-file-noselect args)))
|
|
|
|
(defun nnheader-directory-regular-files (dir)
|
|
"Return a list of all regular files in DIR."
|
|
(let ((files (directory-files dir t))
|
|
out)
|
|
(while files
|
|
(when (file-regular-p (car files))
|
|
(push (car files) out))
|
|
(pop files))
|
|
(nreverse out)))
|
|
|
|
(defun nnheader-directory-files (&rest args)
|
|
"Same as `directory-files', but prune \".\" and \"..\"."
|
|
(let ((files (apply 'directory-files args))
|
|
out)
|
|
(while files
|
|
(unless (member (file-name-nondirectory (car files)) '("." ".."))
|
|
(push (car files) out))
|
|
(pop files))
|
|
(nreverse out)))
|
|
|
|
(defmacro nnheader-skeleton-replace (from &optional to regexp)
|
|
`(let ((new (generate-new-buffer " *nnheader replace*"))
|
|
(cur (current-buffer))
|
|
(start (point-min)))
|
|
(set-buffer cur)
|
|
(goto-char (point-min))
|
|
(while (,(if regexp 're-search-forward 'search-forward)
|
|
,from nil t)
|
|
(insert-buffer-substring
|
|
cur start (prog1 (match-beginning 0) (set-buffer new)))
|
|
(goto-char (point-max))
|
|
,(when to `(insert ,to))
|
|
(set-buffer cur)
|
|
(setq start (point)))
|
|
(insert-buffer-substring
|
|
cur start (prog1 (point-max) (set-buffer new)))
|
|
(copy-to-buffer cur (point-min) (point-max))
|
|
(kill-buffer (current-buffer))
|
|
(set-buffer cur)))
|
|
|
|
(defun nnheader-replace-string (from to)
|
|
"Do a fast replacement of FROM to TO from point to `point-max'."
|
|
(nnheader-skeleton-replace from to))
|
|
|
|
(defun nnheader-replace-regexp (from to)
|
|
"Do a fast regexp replacement of FROM to TO from point to `point-max'."
|
|
(nnheader-skeleton-replace from to t))
|
|
|
|
(defun nnheader-strip-cr ()
|
|
"Strip all \r's from the current buffer."
|
|
(nnheader-skeleton-replace "\r"))
|
|
|
|
(defalias 'nnheader-run-at-time 'run-at-time)
|
|
(defalias 'nnheader-cancel-timer 'cancel-timer)
|
|
(defalias 'nnheader-cancel-function-timers 'cancel-function-timers)
|
|
|
|
(when (featurep 'xemacs)
|
|
(require 'nnheaderxm))
|
|
|
|
(run-hooks 'nnheader-load-hook)
|
|
|
|
(provide 'nnheader)
|
|
|
|
;;; nnheader.el ends here
|