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stackp.scm
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1999-01-02
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#| -*-Scheme-*-
$Id: stackp.scm,v 1.7 1999/01/02 06:06:43 cph Exp $
Copyright (c) 1987-8, 1991, 1999 Massachusetts Institute of Technology
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 2 of the License, 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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|#
;;;; Primitive Stack Parser
(declare (usual-integrations))
(define (rcd #!optional filename continuation)
(let ((do-it
(lambda ()
(write-continuation
(if (default-object? continuation)
(error-continuation)
continuation)))))
(if (or (default-object? filename) (not filename))
(do-it)
(with-output-to-file filename do-it))))
(define (rcr n #!optional continuation)
(continuation-ref (if (default-object? continuation)
(error-continuation)
continuation)
n))
(define (error-continuation)
(let ((condition (nearest-repl/condition)))
(if (not condition)
(error "no error continuation"))
(condition/continuation condition)))
(define (write-continuation continuation)
(let write-stack-stream
((stream (continuation->stream continuation)) (n 0))
(if (not (stream-null? stream))
(begin (if (let ((object (stream-car stream)))
(or (return-address? object)
(compiled-return-address? object)))
(newline))
(newline)
(write n)
(write-string "\t")
(let ((string (write-to-string (stream-car stream) 68)))
(write-string (cdr string))
(if (car string)
(write-string "...")))
(write-stack-stream (tail stream) (1+ n)))))
unspecific)
(define (continuation-ref continuation n)
(stream-ref (continuation->stream continuation) n))
(define (continuation->stream continuation)
(let stack-frame->stream ((frame (continuation->stack-frame continuation)))
(let ((length (stack-frame/length frame)))
(let loop ((n 0))
(if (< n length)
(cons-stream (stack-frame/ref frame n) (loop (1+ n)))
(let ((next (stack-frame/next frame)))
(if next
(stack-frame->stream next)
(stream))))))))