From 8ffbc2df0fde83082610149d24e594c1cd879f4a Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Mon, 20 Feb 2017 00:05:25 -0800
Subject: Import Upstream version 2a6

---
 debug.scm | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 debug.scm

(limited to 'debug.scm')

diff --git a/debug.scm b/debug.scm
new file mode 100644
index 0000000..08406a9
--- /dev/null
+++ b/debug.scm
@@ -0,0 +1,78 @@
+;;;; "debug.scm" Utility functions for debugging in Scheme.
+;;; 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.
+;
+;1.  Any copy made of this software must include this copyright notice
+;in full.
+;
+;2.  I have made no warrantee or representation that the operation of
+;this software will be error-free, and I am under no obligation to
+;provide any services, by way of maintenance, update, or otherwise.
+;
+;3.  In conjunction with products arising from the use of this
+;material, there shall be no use of my name in any advertising,
+;promotional, or sales literature without prior written consent in
+;each case.
+
+(require 'trace)
+(require 'break)
+
+(define (for-each-top-level-definition-in-file file proc)
+  (call-with-input-file
+      file
+    (lambda
+	(port)
+      (letrec
+	  ((walk
+	    (lambda (exp)
+	      (cond
+	       ((not (and (pair? exp) (list? exp))))
+	       ((not (symbol? (car exp))))
+	       (else
+		(case (car exp)
+		  ((begin) (for-each walk (cdr exp)))
+		  ((cond)  (for-each
+			    (lambda (exp)
+			      (for-each walk
+					(if (list? (car exp)) exp (cdr exp))))
+			    (cdr exp)))
+		  ((if)    (for-each
+			    walk
+			    (if (list? (cadr exp)) (cdr exp) (cddr exp))))
+		  ((defmacro define-syntax) "should do something clever here")
+		  ((define)
+		   (proc exp))))))))
+	(do ((form (read port) (read port)))
+	    ((eof-object? form))
+	  (walk form))))))
+
+(define (for-each-top-level-defined-procedure-symbol-in-file file proc)
+  (letrec ((get-defined-symbol
+	    (lambda (form)
+	      (if (pair? form)
+		  (get-defined-symbol (car form))
+		  form))))
+    (for-each-top-level-definition-in-file
+     file
+     (lambda (form) (let ((sym (get-defined-symbol (cadr form))))
+		      (cond ((procedure? (slib:eval sym))
+			     (proc sym))))))))
+
+(define (debug:trace-all file)
+  (for-each-top-level-defined-procedure-symbol-in-file
+   file
+   (lambda (sym)
+     (slib:eval `(set! ,sym (trace:tracef ,sym ',sym))))))
+
+(define trace-all debug:trace-all)
+
+(define (debug:break-all file)
+  (for-each-top-level-defined-procedure-symbol-in-file
+   file
+   (lambda (sym)
+     (slib:eval `(set! ,sym (break:breakf ,sym ',sym))))))
+
+(define break-all debug:break-all)
-- 
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