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;;;; (ice-9 debugging trc) -- tracing for Guile debugger code
;;; Copyright (C) 2002, 2004 Free Software Foundation, Inc.
;;;
;; This library is free software; you can redistribute it and/or
;; modify it under the terms of the GNU Lesser General Public
;; License as published by the Free Software Foundation; either
;; version 2.1 of the License, or (at your option) any later version.
;;
;; This library 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
;; Lesser General Public License for more details.
;;
;; You should have received a copy of the GNU Lesser General Public
;; License along with this library; if not, write to the Free Software
;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(define-module (ice-9 debugging trc)
#:export (trc trc-syms trc-all trc-none trc-add trc-remove trc-port))
(define *syms* #f)
(define (trc-set! syms)
(set! *syms* syms))
(define (trc-syms . syms)
(trc-set! syms))
(define (trc-all)
(trc-set! #f))
(define (trc-none)
(trc-set! '()))
(define (trc-add sym)
(trc-set! (cons sym *syms*)))
(define (trc-remove sym)
(trc-set! (delq1! sym *syms*)))
(define (trc sym . args)
(if (or (not *syms*)
(memq sym *syms*))
(let ((port (trc-port)))
(write sym port)
(display ":" port)
(for-each (lambda (arg)
(display " " port)
(write arg port))
args)
(newline port))))
(define trc-port
(let ((port (current-error-port)))
(make-procedure-with-setter
(lambda () port)
(lambda (p) (set! port p)))))
;; Default to no tracing.
(trc-none)
;;; (ice-9 debugging trc) ends here.
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