ice-9/debugging/trc.scm

   1 ;;;; (ice-9 debugging trc) -- tracing for Guile debugger code
   2
   3 ;;; Copyright (C) 2002, 2004 Free Software Foundation, Inc.
   4 ;;;
   5 ;; This library is free software; you can redistribute it and/or
   6 ;; modify it under the terms of the GNU Lesser General Public
   7 ;; License as published by the Free Software Foundation; either
   8 ;; version 2.1 of the License, or (at your option) any later version.
   9 ;;
  10 ;; This library is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 ;; Lesser General Public License for more details.
  14 ;;
  15 ;; You should have received a copy of the GNU Lesser General Public
  16 ;; License along with this library; if not, write to the Free Software
  17 ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18
  19 (define-module (ice-9 debugging trc)
  20   #:export (trc trc-syms trc-all trc-none trc-add trc-remove trc-port))
  21
  22 (define *syms* #f)
  23
  24 (define (trc-set! syms)
  25   (set! *syms* syms))
  26
  27 (define (trc-syms . syms)
  28   (trc-set! syms))
  29
  30 (define (trc-all)
  31   (trc-set! #f))
  32
  33 (define (trc-none)
  34   (trc-set! '()))
  35
  36 (define (trc-add sym)
  37   (trc-set! (cons sym *syms*)))
  38
  39 (define (trc-remove sym)
  40   (trc-set! (delq1! sym *syms*)))
  41
  42 (define (trc sym . args)
  43   (if (or (not *syms*)
  44           (memq sym *syms*))
  45       (let ((port (trc-port)))
  46         (write sym port)
  47         (display ":" port)
  48         (for-each (lambda (arg)
  49                     (display " " port)
  50                     (write arg port))
  51                   args)
  52         (newline port))))
  53
  54 (define trc-port
  55   (let ((port (current-error-port)))
  56     (make-procedure-with-setter
  57      (lambda () port)
  58      (lambda (p) (set! port p)))))
  59
  60 ;; Default to no tracing.
  61 (trc-none)
  62
  63 ;;; (ice-9 debugging trc) ends here.