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Optimize search a bit.

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This commit is contained in:
Andrey Kotlarski 2013-04-01 12:06:48 +03:00
parent 88cf03caba
commit 670561e811
1 changed files with 21 additions and 18 deletions
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39
vlfi.el
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@ -277,17 +277,18 @@ OP-TYPE specifies the file operation being performed over FILENAME."
(if backward
(while (not (zerop to-find))
(cond ((re-search-backward regexp nil t)
(setq match-start-pos (+ vlfi-start-pos
(match-beginning 0)))
(let ((new-match-end (+ vlfi-start-pos
(match-end 0))))
(if (< new-match-end match-end-pos)
(setq to-find (1- to-find)
match-end-pos new-match-end))))
(setq to-find (1- to-find)
match-start-pos (+ vlfi-start-pos
(match-beginning 0))
match-end-pos (+ vlfi-start-pos
(match-end 0))))
((zerop vlfi-start-pos)
(throw 'end-of-file nil))
(t (vlfi-move-to-batch (- vlfi-start-pos
half-batch))
(t (let ((half-move (- vlfi-start-pos half-batch)))
(vlfi-move-to-batch
(if (< match-start-pos half-move)
(- match-start-pos vlfi-batch-size)
half-move)))
(goto-char (if (< match-start-pos
vlfi-end-pos)
(- match-start-pos
@ -297,16 +298,18 @@ OP-TYPE specifies the file operation being performed over FILENAME."
vlfi-start-pos))))
(while (not (zerop to-find))
(cond ((re-search-forward regexp nil t)
(setq match-end-pos (+ vlfi-start-pos
(match-end 0)))
(let ((new-match-start (+ vlfi-start-pos
(match-beginning 0))))
(if (< match-start-pos new-match-start)
(setq to-find (1- to-find)
match-start-pos new-match-start))))
(setq to-find (1- to-find)
match-start-pos (+ vlfi-start-pos
(match-beginning 0))
match-end-pos (+ vlfi-start-pos
(match-end 0))))
((= vlfi-end-pos vlfi-file-size)
(throw 'end-of-file nil))
(t (vlfi-move-to-batch (- vlfi-end-pos half-batch))
(t (let ((half-move (- vlfi-end-pos half-batch)))
(vlfi-move-to-batch
(if (< half-move match-end-pos)
match-end-pos
half-move)))
(goto-char (if (< vlfi-start-pos match-end-pos)
(- match-end-pos vlfi-start-pos)
(point-min)))
@ -341,7 +344,7 @@ successful. Return nil if nothing found."
(defun vlfi-re-search-backward (regexp count)
"Search backward for REGEXP prefix COUNT number of times."
(interactive (list (read-regexp "Search whole file"
(interactive (list (read-regexp "Search whole file backward"
(if regexp-history
(car regexp-history))
'regexp-history)