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[elpa] externals/vlf 57eb4c2 099/310: Initial attempt at optimizing chun
From: |
Stefan Monnier |
Subject: |
[elpa] externals/vlf 57eb4c2 099/310: Initial attempt at optimizing chunk access. |
Date: |
Sat, 28 Nov 2020 00:32:55 -0500 (EST) |
branch: externals/vlf
commit 57eb4c270a2c9930bd656546ba05e329c58a8831
Author: Andrey Kotlarski <m00naticus@gmail.com>
Commit: Andrey Kotlarski <m00naticus@gmail.com>
Initial attempt at optimizing chunk access.
---
vlfi.el | 198 ++++++++++++++++++++++++++++++++++------------------------------
1 file changed, 106 insertions(+), 92 deletions(-)
diff --git a/vlfi.el b/vlfi.el
index b157ea3..b6f778d 100644
--- a/vlfi.el
+++ b/vlfi.el
@@ -47,7 +47,7 @@
;;; Keep track of file position.
(defvar vlfi-start-pos 0
"Absolute position of the visible chunk start.")
-(defvar vlfi-end-pos vlfi-batch-size
+(defvar vlfi-end-pos 0
"Absolute position of the visible chunk end.")
(defvar vlfi-file-size 0 "Total size of presented file.")
@@ -97,10 +97,10 @@ buffer. You can customize number of bytes displayed by
customizing
`vlfi-batch-size'."
(interactive "fFile to open: ")
(with-current-buffer (generate-new-buffer "*vlfi*")
+ (vlfi-mode)
(setq buffer-file-name file
vlfi-file-size (vlfi-get-file-size file))
(vlfi-insert-file)
- (vlfi-mode)
(switch-to-buffer (current-buffer))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -208,12 +208,13 @@ with the prefix argument DECREASE it is halved."
(defun vlfi-insert-file (&optional from-end)
"Insert first chunk of current file contents in current buffer.
With FROM-END prefix, start from the back."
- (if from-end
- (setq vlfi-start-pos (max 0 (- vlfi-file-size vlfi-batch-size))
- vlfi-end-pos vlfi-file-size)
- (setq vlfi-start-pos 0
- vlfi-end-pos (min vlfi-batch-size vlfi-file-size)))
- (vlfi-move-to-chunk vlfi-start-pos vlfi-end-pos))
+ (let ((start 0)
+ (end vlfi-batch-size))
+ (if from-end
+ (setq start (- vlfi-file-size vlfi-batch-size)
+ end vlfi-file-size)
+ (setq end (min vlfi-batch-size vlfi-file-size)))
+ (vlfi-move-to-chunk start end)))
(defun vlfi-beginning-of-file ()
"Jump to beginning of file content."
@@ -251,26 +252,13 @@ When prefix argument is negative
(interactive "p")
(or (verify-visited-file-modtime (current-buffer))
(setq vlfi-file-size (vlfi-get-file-size buffer-file-name)))
- (let ((end (min (+ vlfi-end-pos (* vlfi-batch-size
- (abs append)))
- vlfi-file-size)))
- (let ((inhibit-read-only t)
- (do-append (< append 0))
- (pos (position-bytes (point))))
- (if do-append
- (goto-char (point-max))
- (setq vlfi-start-pos (- end vlfi-batch-size))
- (erase-buffer))
- (insert-file-contents buffer-file-name nil (if do-append
- vlfi-end-pos
- vlfi-start-pos)
- end)
- (setq vlfi-end-pos end)
- (goto-char (or (byte-to-position (+ pos (vlfi-adjust-chunk)))
- (point-max)))))
- (set-visited-file-modtime)
- (set-buffer-modified-p nil)
- (vlfi-update-buffer-name))
+ (let* ((end (min (+ vlfi-end-pos (* vlfi-batch-size
+ (abs append)))
+ vlfi-file-size))
+ (start (if (< append 0)
+ vlfi-start-pos
+ (- end vlfi-batch-size))))
+ (vlfi-move-to-chunk start end)))
(defun vlfi-prev-batch (prepend)
"Display the previous batch of file data.
@@ -281,31 +269,12 @@ When prefix argument is negative
(interactive "p")
(if (zerop vlfi-start-pos)
(error "Already at BOF"))
- (or (verify-visited-file-modtime (current-buffer))
- (setq vlfi-file-size (vlfi-get-file-size buffer-file-name)))
- (let ((inhibit-read-only t)
- (start (max 0 (- vlfi-start-pos (* vlfi-batch-size
- (abs prepend)))))
- (do-prepend (< prepend 0))
- (pos (- (position-bytes (point-max))
- (position-bytes (point)))))
- (if do-prepend
- (goto-char (point-min))
- (setq vlfi-end-pos (min (+ start vlfi-batch-size)
- vlfi-file-size))
- (erase-buffer))
- (insert-file-contents buffer-file-name nil start
- (if do-prepend
- vlfi-start-pos
- vlfi-end-pos))
- (setq vlfi-start-pos start)
- (setq pos (+ pos (vlfi-adjust-chunk)))
- (goto-char (or (byte-to-position (- (position-bytes (point-max))
- pos))
- (point-max))))
- (set-visited-file-modtime)
- (set-buffer-modified-p nil)
- (vlfi-update-buffer-name))
+ (let* ((start (max 0 (- vlfi-start-pos (* vlfi-batch-size
+ (abs prepend)))))
+ (end (if (< prepend 0)
+ vlfi-end-pos
+ (+ start vlfi-batch-size))))
+ (vlfi-move-to-chunk start end)))
(defun vlfi-move-to-batch (start &optional minimal)
"Move to batch determined by START.
@@ -313,39 +282,92 @@ Adjust according to file start/end and show
`vlfi-batch-size' bytes.
When given MINIMAL flag, skip non important operations."
(or (verify-visited-file-modtime (current-buffer))
(setq vlfi-file-size (vlfi-get-file-size buffer-file-name)))
- (setq vlfi-start-pos (max 0 start)
- vlfi-end-pos (min (+ vlfi-start-pos vlfi-batch-size)
- vlfi-file-size))
- (if (= vlfi-file-size vlfi-end-pos) ; re-check file size
- (setq vlfi-start-pos (max 0 (- vlfi-end-pos vlfi-batch-size))))
- (let ((inhibit-read-only t)
- (pos (position-bytes (point))))
- (erase-buffer)
- (insert-file-contents buffer-file-name nil
- vlfi-start-pos vlfi-end-pos)
- (goto-char (or (byte-to-position (+ pos (vlfi-adjust-chunk)))
- (point-max))))
- (set-buffer-modified-p nil)
- (set-visited-file-modtime)
- (or minimal(vlfi-update-buffer-name)))
+ (let ((start (max 0 start))
+ (end (min (+ vlfi-start-pos vlfi-batch-size)
+ vlfi-file-size)))
+ (if (= vlfi-file-size end) ; re-adjust start
+ (setq start (max 0 (- end vlfi-batch-size))))
+ (vlfi-move-to-chunk start end)))
(defun vlfi-move-to-chunk (start end &optional minimal)
"Move to chunk determined by START END.
When given MINIMAL flag, skip non important operations."
- (or (verify-visited-file-modtime (current-buffer))
- (setq vlfi-file-size (vlfi-get-file-size buffer-file-name)))
- (setq vlfi-start-pos (max 0 start)
- vlfi-end-pos (min end vlfi-file-size))
- (let ((inhibit-read-only t)
- (pos (position-bytes (point))))
- (erase-buffer)
- (insert-file-contents buffer-file-name nil
- vlfi-start-pos vlfi-end-pos)
- (goto-char (or (byte-to-position (+ pos (vlfi-adjust-chunk)))
- (point-max))))
- (set-buffer-modified-p nil)
- (set-visited-file-modtime)
- (or minimal (vlfi-update-buffer-name)))
+ (catch 'abort
+ (let ((changed (not (verify-visited-file-modtime
+ (current-buffer))))
+ (modified (buffer-modified-p))
+ (start (max 0 start))
+ (end (min end vlfi-file-size)))
+ (if changed
+ (setq vlfi-file-size (vlfi-get-file-size buffer-file-name)))
+ (if (or changed
+ (<= vlfi-end-pos start)
+ (<= end vlfi-start-pos))
+ (progn ; full chunk renewal
+ (if (and modified
+ (not (y-or-n-p
+ "Buffer modified, are you sure? ")))
+ (throw 'abort nil))
+ (setq vlfi-start-pos start
+ vlfi-end-pos end)
+ (let ((inhibit-read-only t)
+ (pos (position-bytes (point))))
+ (erase-buffer)
+ (insert-file-contents buffer-file-name nil
+ vlfi-start-pos vlfi-end-pos)
+ (goto-char (or (byte-to-position
+ (+ pos (vlfi-adjust-chunk)))
+ (point-max))))
+ (set-buffer-modified-p nil))
+ (if (and modified
+ (or (< end vlfi-end-pos)
+ (< 3 (- start vlfi-start-pos)))
+ (not (y-or-n-p "Buffer modified, are you sure? ")))
+ (throw 'abort nil))
+ (let ((pos (+ (position-bytes (point))
+ vlfi-start-pos))
+ (adjust-encoding (or (< vlfi-end-pos end)
+ (< start vlfi-start-pos))))
+ (if adjust-encoding
+ (let ((inhibit-read-only t))
+ (encode-coding-region (point-min) (point-max)
+ buffer-file-coding-system)))
+ (cond ((< end vlfi-end-pos) ; adjust ends
+ (let ((inhibit-read-only t))
+ (delete-region (1+ (- end vlfi-start-pos))
+ (point-max))))
+ ((< vlfi-end-pos end)
+ (goto-char (point-max))
+ (let ((inhibit-read-only t))
+ (insert-file-contents-literally
+ buffer-file-name nil vlfi-end-pos end))))
+ (cond ((< start vlfi-start-pos) ; adjust start
+ (goto-char (point-min))
+ (let ((inhibit-read-only t))
+ (insert-file-contents-literally
+ buffer-file-name nil start (1- vlfi-start-pos)))
+ (setq vlfi-start-pos start))
+ ((< 3 (- start vlfi-start-pos))
+ (let ((inhibit-read-only t))
+ (delete-region (point-min)
+ (byte-to-position
+ (- start vlfi-start-pos 1))))
+ (setq vlfi-start-pos start)))
+ (if adjust-encoding
+ (let ((inhibit-read-only t))
+ (decode-coding-region (point-min) (point-max)
+ buffer-file-coding-system)))
+ (or modified
+ (set-buffer-modified-p nil))
+ (setq vlfi-end-pos end)
+ (goto-char
+ (cond ((< pos vlfi-start-pos) (point-min))
+ ((< vlfi-end-pos pos) (point-max))
+ (t (or (byte-to-position (- pos vlfi-start-pos))
+ (point-min)))))))
+ (if changed
+ (set-visited-file-modtime)))
+ (or minimal (vlfi-update-buffer-name))))
(defun vlfi-adjust-chunk ()
"Adjust chunk beginning until content can be properly decoded.
@@ -590,16 +612,8 @@ EVENT may hold details of the invocation."
(setq buffer (vlfi file))
(switch-to-buffer occur-buffer)))
(pop-to-buffer buffer)
- (if (buffer-modified-p)
- (cond ((and (= vlfi-start-pos chunk-start)
- (= vlfi-end-pos chunk-end))
- (goto-char match-pos))
- ((y-or-n-p "VLFI buffer has been modified. \
-Really jump to new chunk? ")
- (vlfi-move-to-chunk chunk-start chunk-end)
- (goto-char match-pos)))
- (vlfi-move-to-chunk chunk-start chunk-end)
- (goto-char match-pos))))))
+ (vlfi-move-to-chunk chunk-start chunk-end)
+ (goto-char match-pos)))))
(defun vlfi-occur (regexp)
"Make whole file occur style index for REGEXP.
- [elpa] externals/vlf b34bd2e 082/310: Don't use temporary buffer when adjusting expanded file content., (continued)
- [elpa] externals/vlf b34bd2e 082/310: Don't use temporary buffer when adjusting expanded file content., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 681d3d9 084/310: Add vlfi-occur-mode., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 641ff4b 085/310: First feature complete version of vlfi-occur., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 1dcd122 086/310: Use overlays for number indicators., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf f14ef6c 087/310: Usability improvements to vlfi-occur., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 54927af 088/310: Update README and bump version., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf b8cc344 091/310: Add more detailed usage details., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf eaf85e5 093/310: Add key-binding to vlfi-mode-map in vlfi-edit-mode-map., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf e4d886a 092/310: Add check if VLFI buffer has been modified before occur jumping to new, Stefan Monnier, 2020/11/28
- [elpa] externals/vlf a63ea7a 095/310: Grammar fixes., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 57eb4c2 099/310: Initial attempt at optimizing chunk access.,
Stefan Monnier <=
- [elpa] externals/vlf d2bd47c 100/310: More attempts to optimize decoding., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 7bfe665 102/310: More secure chunk decode adjustment and minor fixes., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf bbda9ab 105/310: Merge branch 'master' into chunk-opt2, Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 1ac1eec 106/310: Turn vlfi-get-file-size to function., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf de1948e 108/310: Merge branch 'master' into chunk-opt2, Stefan Monnier, 2020/11/28
- [elpa] externals/vlf c827c3e 110/310: Prevent standard save procedure invocation in case user postpones, Stefan Monnier, 2020/11/28
- [elpa] externals/vlf b943008 113/310: Bump version and update README., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf c1aedbc 116/310: Update README: VLFI is now development version of VLF., Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 616d676 114/310: Alters vlfi to respect the default-directory variable when opening, Stefan Monnier, 2020/11/28
- [elpa] externals/vlf 3d652fe 103/310: Minor documentation fixes., Stefan Monnier, 2020/11/28