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-rw-r--r--break.scm24
1 files changed, 11 insertions, 13 deletions
diff --git a/break.scm b/break.scm
index e6ba634..4d18efc 100644
--- a/break.scm
+++ b/break.scm
@@ -1,9 +1,9 @@
;;;; "break.scm" Breakpoints for debugging in Scheme.
-;;; Copyright (C) 1991, 1992, 1993, 1995 Aubrey Jaffer.
+;;; Copyright (C) 1991, 1992, 1993, 1995 Aubrey Jaffer
;
-;Permission to copy this software, to redistribute it, and to use it
-;for any purpose is granted, subject to the following restrictions and
-;understandings.
+;Permission to copy this software, to modify it, to redistribute it,
+;to distribute modified versions, and to use it for any purpose is
+;granted, subject to the following restrictions and understandings.
;
;1. Any copy made of this software must include this copyright notice
;in full.
@@ -35,6 +35,7 @@
(apply apply) (qpn qpn)
(cons cons) (length length))
(lambda args
+ (if (provided? 'trace) (print-call-stack (current-error-port)))
(apply qpn "BREAKPOINT:" args)
(let ((ans
(call-with-current-continuation
@@ -71,14 +72,14 @@
(define bkpt debug:breakpoint)
(define continue debug:continue)
-(define debug:breakf
+(define breakf
(let ((null? null?) ;These bindings are so that
(not not) ;breakf will not break on parts
(car car) (cdr cdr) ;of itself.
(eq? eq?) (+ +) (zero? zero?) (modulo modulo)
(apply apply) (display display) (breakpoint debug:breakpoint))
(lambda (function . optname)
-;;; (set! debug:indent 0)
+ ;; (set! trace:indent 0)
(let ((name (if (null? optname) function (car optname))))
(lambda args
(cond ((and (not (null? args))
@@ -92,8 +93,8 @@
;;; the reason I use a symbol for debug:unbreak-object is so
;;; that functions can still be unbreaked if this file is read in twice.
-(define (debug:unbreakf function)
-;;; (set! debug:indent 0)
+(define (unbreakf function)
+ ;; (set! trace:indent 0)
(function 'debug:unbreak-object))
;;;;The break: functions wrap around the debug: functions to provide
@@ -117,7 +118,7 @@
(cond ((and p (eq? (cdr p) fun))
fun)
(else
- (let ((tfun (debug:breakf fun sym)))
+ (let ((tfun (breakf fun sym)))
(set! *breakd-procedures*
(break:adder *breakd-procedures* sym tfun))
tfun)))))))
@@ -128,12 +129,9 @@
(cond ((not (procedure? fun)) fun)
((not p) fun)
((eq? (cdr p) fun)
- (debug:unbreakf fun))
+ (unbreakf fun))
(else fun))))
-(define breakf debug:breakf)
-(define unbreakf debug:unbreakf)
-
;;;; Finally, the macros break and unbreak
(defmacro break xs