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;; Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
;; All rights reserved.
;; Copyright (C) 2007-2011, Gabriel Dos Reis.
;; All rights reserved.
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions are
;; met:
;;
;; - Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;;
;; - Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in
;; the documentation and/or other materials provided with the
;; distribution.
;;
;; - Neither the name of The Numerical ALgorithms Group Ltd. nor the
;; names of its contributors may be used to endorse or promote products
;; derived from this software without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
;; IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
;; TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
;; PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
;; OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
;; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
;; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;; this files contains basic routines for error handling
(import-module "macros")
(in-package "BOOT")
(defun error-format (message args)
(let ((|$BreakMode| '|break|))
(declare (special |$BreakMode|))
(if (stringp message) (apply #'format nil message args) nil)))
;;(defmacro |trappedSpadEval| (form) form) ;;nop for now
#+:gcl
(defun |resetStackLimits| () (system:reset-stack-limits))
#-:gcl
(defun |resetStackLimits| () nil)
(defvar |$oldBreakMode|)
;; following macro evaluates form returning Maybe type-of form
#+:gcl
(defmacro |trapNumericErrors| (form)
`(let ((|$oldBreakMode| |$BreakMode|)
(|$BreakMode| '|trapNumerics|))
(val))
(catch '|trapNumerics| ,form))
#-:gcl
(defmacro |trapNumericErrors| (form)
`(handler-bind ((division-by-zero
#'(lambda (c) (declare (ignore c)) |%nothing|)))
,form))
;; the following form embeds around the akcl error handler
#+:gcl
(eval-when
(load eval)
(unembed 'system:universal-error-handler)
(embed 'system:universal-error-handler
'(lambda (type correctable? op
continue-string error-string &rest args)
(block
nil
(setq |$NeedToSignalSessionManager| T)
(if (and (boundp '|$inLispVM|) (boundp '|$BreakMode|))
(cond ((eq |$BreakMode| '|validate|)
(|systemError| (error-format error-string args)))
((and (eq |$BreakMode| '|trapNumerics|)
(eq type :ERROR))
(setq |$BreakMode| nil)
(throw '|trapNumerics| |%nothing|))
((and (eq |$BreakMode| '|trapNumerics|)
(boundp '|$oldBreakMode|)
(setq |$BreakMode| |$oldBreakMode|)
nil)) ;; resets error handler
((and (null |$inLispVM|)
(memq |$BreakMode| '(|nobreak| |query| |resume|)))
(let ((|$inLispVM| T)) ;; turn off handler
(return
(|systemError| (error-format error-string args)))))
((eq |$BreakMode| '|letPrint2|)
(setq |$BreakMode| nil)
(throw '|letPrint2| nil))))
(apply system:universal-error-handler type correctable? op
continue-string error-string args )))))
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