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emacs
emacs
Commits
5cce080e
Commit
5cce080e
authored
Feb 04, 2006
by
Kim F. Storm
Browse files
(magic-mode-regexp-match-limit): New defvar.
(set-auto-mode): Use it to limit magic-mode-alist matching.
parent
53391989
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lisp/files.el
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5cce080e
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@@ -2047,6 +2047,9 @@ to decide the buffer's major mode.
If FUNCTION is nil, then it is not called. (That is a way of saying
\"allow `auto-mode-alist' to decide for these files.\")")
(defvar magic-mode-regexp-match-limit 4000
"Upper limit on `magic-mode-alist' regexp matches.")
(defun set-auto-mode (&optional keep-mode-if-same)
"Select major mode appropriate for current buffer.
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@@ -2120,9 +2123,13 @@ only set the major mode, if that would change it."
(unless done
(if (setq done (save-excursion
(goto-char (point-min))
(assoc-default nil magic-mode-alist
(lambda (re dummy)
(looking-at re)))))
(save-restriction
(narrow-to-region (point-min)
(min (point-max)
(+ (point-min) magic-mode-regexp-match-limit)))
(assoc-default nil magic-mode-alist
(lambda (re dummy)
(looking-at re))))))
(set-auto-mode-0 done keep-mode-if-same)
;; Compare the filename against the entries in auto-mode-alist.
(if buffer-file-name
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