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72 lines
3 KiB
Scheme
72 lines
3 KiB
Scheme
;;;; (ice-9 debugger state) -- debugger state representation
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;;; Copyright (C) 2002 Free Software Foundation, Inc.
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;;;
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;;; This program is free software; you can redistribute it and/or
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;;; modify it under the terms of the GNU General Public License as
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;;; published by the Free Software Foundation; either version 2, or
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;;; (at your option) any later version.
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;;;
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;;; This program is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;; General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with this software; see the file COPYING. If not, write to
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;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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;;; Boston, MA 02111-1307 USA
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;;;
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;;; As a special exception, the Free Software Foundation gives permission
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;;; for additional uses of the text contained in its release of GUILE.
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;;;
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;;; The exception is that, if you link the GUILE library with other files
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;;; to produce an executable, this does not by itself cause the
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;;; resulting executable to be covered by the GNU General Public License.
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;;; Your use of that executable is in no way restricted on account of
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;;; linking the GUILE library code into it.
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;;;
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;;; This exception does not however invalidate any other reasons why
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;;; the executable file might be covered by the GNU General Public License.
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;;;
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;;; This exception applies only to the code released by the
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;;; Free Software Foundation under the name GUILE. If you copy
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;;; code from other Free Software Foundation releases into a copy of
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;;; GUILE, as the General Public License permits, the exception does
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;;; not apply to the code that you add in this way. To avoid misleading
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;;; anyone as to the status of such modified files, you must delete
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;;; this exception notice from them.
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;;;
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;;; If you write modifications of your own for GUILE, it is your choice
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;;; whether to permit this exception to apply to your modifications.
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;;; If you do not wish that, delete this exception notice.
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(define-module (ice-9 debugger state)
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#:export (make-state
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state-stack
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state-index
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state-flags
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set-stack-index!))
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(define state-rtd (make-record-type "debugger-state" '(stack index flags)))
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(define state? (record-predicate state-rtd))
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(define make-state
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(let ((make-state-internal (record-constructor state-rtd
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'(stack index flags))))
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(lambda (stack index . flags)
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(make-state-internal stack index flags))))
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(define state-stack (record-accessor state-rtd 'stack))
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(define state-index (record-accessor state-rtd 'index))
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(define state-flags (record-accessor state-rtd 'flags))
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(define set-state-index! (record-modifier state-rtd 'index))
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(define (set-stack-index! state index)
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(let* ((stack (state-stack state))
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(ssize (stack-length stack)))
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(set-state-index! state
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(cond ((< index 0) 0)
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((>= index ssize) (- ssize 1))
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(else index)))))
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;;; (ice-9 debugger state) ends here.
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