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|
;;; CFLOW.EL --- C flow graph
;; Copyright (C) 1997 Paul Barham
;; Author: Paul Barham Paul.Barham@cl.cam.ac.uk
;; Maintainer: Paul Barham Paul.Barham@cl.cam.ac.uk
;; Created: 19 Mar 1997
;; Version: 1.0
;; Keywords: C language cxref flow static call graph browser
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 1, or (at your option)
;; any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; A copy of the GNU General Public License can be obtained from this
;; program's author (send electronic mail to Paul.Barham@cl.cam.ac.uk)
;; or from the Free Software Foundation, Inc., 675 Mass Ave,
;; Cambridge, MA 02139, USA.
;; LCD Archive Entry:
;; cflow|Paul Barham|Paul.Barham@cl.cam.ac.uk
;; |C flow graph
;; |$Date$|$Revision$|~/packages/cflow.el
;;; Commentary:
;; This package is intended to be used in conjunction with cxref
;; packeage (http://www.gedanken.demon.co.uk/cxref/index.html)
;; It parses the cxref.function file generated by cxref and fires up
;; a sort of folding mode which allows the hierarchical flow graph
;; to be recursively expanded.
;;
;; Simply find the file cxref.function in a buffer and type M-x cflow
;;
;; Then you can use:
;;
;; SPC or RETURN Expand the current line
;; x Close up the flow graph under the current node
;; . Find the function on the current line in another window
;; q Quit
;;
;;; Change log:
;; $Log$
;;; Variables:
(defvar cflow-filenames t
"Show filenames where each function is declared")
(defvar cflow-main "main"
"The name of the function at the root of the flowgraph")
(defvar cflow-indent "| "
"The indentation string added per-level of the flowgraph")
;;; Code:
;;;
;;; This reads in the output of cxref
;;;
(defun cxref-readline ()
(interactive)
(let (file fn scope refs
(eol (progn (end-of-line) (point))))
(beginning-of-line)
(re-search-forward "\\([^ \t]+\\)[ \t]*" eol t)
(setq file (buffer-substring-no-properties
(match-beginning 1) (match-end 1)))
(re-search-forward "\\([^ \t]+\\)[ \t]*" eol t)
(setq fn (buffer-substring-no-properties
(match-beginning 1) (match-end 1)))
(re-search-forward "\\([0-9]+\\)[ \t]*" eol t)
(setq scope (car (read-from-string
(buffer-substring-no-properties
(match-beginning 1) (match-end 1)))))
(setq refs nil)
(while (re-search-forward "\\([^ \t]+\\)[ \t]*" eol t)
(setq refs (cons (buffer-substring-no-properties
(match-beginning 1) (match-end 1)) refs)))
(list fn file scope (nreverse refs))
))
(defun cxref-parse ()
(interactive)
(let (fns)
(save-excursion
(beginning-of-buffer)
(while (< (point) (point-max))
(setq fns (cons (cxref-readline) fns))
(forward-line 1))
)
fns)
)
(defun cflow-insert (indent fname)
(string-match "[&%]*\\(.*\\)" fname)
(let* ((basename (substring fname (match-beginning 1)))
(fun (assoc basename cflow-fns)))
(if fun
(insert (concat indent
fname
(if cflow-filenames
(concat " (" (nth 1 fun) ")")
"")
"\n"))
(insert (concat indent fname "\n")))
))
(defun cflow-expand ()
"Expand this node in the flow graph"
(interactive)
(let (name indent fun)
(save-excursion
(beginning-of-line)
(re-search-forward "\\(^[| ]*\\)[&%]*\\([*a-zA-Z0-9_$]+\\)")
(setq indent (concat (buffer-substring-no-properties
(match-beginning 1)
(match-end 1)) cflow-indent))
(setq name (buffer-substring-no-properties
(match-beginning 2)
(match-end 2)))
(setq fun (assoc name cflow-fns))
(forward-line 1)
(beginning-of-line)
(or (looking-at indent)
(mapcar (lambda (fname)
(cflow-insert indent fname))
(nth 3 fun)))
))
)
(defun cflow-contract ()
"Close up this section of the flow graph"
(interactive)
(let (name indent fun)
(save-excursion
(beginning-of-line)
(re-search-forward "\\(^[| ]*\\)")
(setq indent (concat (buffer-substring-no-properties
(match-beginning 1)
(match-end 1)) cflow-indent))
(forward-line 1)
(beginning-of-line)
(while (looking-at indent)
(kill-line 1))
))
)
(defun cflow-tag ()
"Find the function on the current line using TAGS"
(interactive)
(let (name indent fun)
(save-excursion
(beginning-of-line)
(re-search-forward "\\(^[| ]*\\)[&%]*\\([*a-zA-Z0-9_$]+\\)")
(setq indent (concat (buffer-substring-no-properties
(match-beginning 1)
(match-end 1)) cflow-indent))
(setq name (buffer-substring-no-properties
(match-beginning 2)
(match-end 2)))
(message "Finding %s" name)
(find-tag-other-window name)))
)
(define-derived-mode cflow-mode fundamental-mode "CFlow"
(setq cflow-mode t)
;; Linemenu simply highlights the current line
; (linemenu-initialize)
)
(define-key cflow-mode-map " " 'cflow-expand)
(define-key cflow-mode-map "" 'cflow-expand)
(define-key cflow-mode-map "x" 'cflow-contract)
(define-key cflow-mode-map "." 'cflow-tag)
(define-key cflow-mode-map "q" 'bury-buffer)
(defun cflow ()
(interactive)
(let ((buf (get-buffer-create "*cflow*")))
(setq cflow-fns (cxref-parse))
(switch-to-buffer buf)
(cflow-mode)
(erase-buffer)
;; Don't understand this :-)
; (make-local-variable 'cflow-fns)
(cflow-insert "" "$")
(cflow-insert "" cflow-main))
)
;;; CFLOW.EL ends here
|
