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;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: FLEXI-STREAMS; Base: 10 -*-
;;; $Header: /usr/local/cvsrep/flexi-streams/conditions.lisp,v 1.9 2008/05/25 22:23:58 edi Exp $
;;; Copyright (c) 2005-2008, Dr. Edmund Weitz. 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.
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
;;; 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 AUTHOR 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.
(in-package :flexi-streams)
(define-condition flexi-stream-error (stream-error)
()
(:documentation "Superclass for all errors related to flexi
streams."))
(define-condition flexi-stream-simple-error (flexi-stream-error simple-condition)
()
(:documentation "Like FLEXI-STREAM-ERROR but with formatting
capabilities."))
(define-condition flexi-stream-element-type-error (flexi-stream-error)
((element-type :initarg :element-type
:reader flexi-stream-element-type-error-element-type))
(:report (lambda (condition stream)
(format stream "Element type ~S not allowed."
(flexi-stream-element-type-error-element-type condition))))
(:documentation "Errors of this type are signalled if the flexi
stream has a wrong element type."))
(define-condition flexi-stream-out-of-sync-error (flexi-stream-error)
()
(:report (lambda (condition stream)
(declare (ignore condition))
(format stream "Stream out of sync from previous
lookahead, couldn't rewind.")))
(:documentation "This can happen if you're trying to write to an IO
stream which had prior to that `looked ahead' while reading and now
can't `rewind' to the octet where you /should/ be."))
(define-condition in-memory-stream-error (stream-error)
()
(:documentation "Superclass for all errors related to
IN-MEMORY streams."))
(define-condition in-memory-stream-simple-error (in-memory-stream-error simple-condition)
()
(:documentation "Like IN-MEMORY-STREAM-ERROR but with formatting
capabilities."))
(define-condition in-memory-stream-closed-error (in-memory-stream-error)
()
(:report (lambda (condition stream)
(format stream "~S is closed."
(stream-error-stream condition))))
(:documentation "An error that is signalled when someone is trying
to read from or write to a closed IN-MEMORY stream."))
(define-condition in-memory-stream-position-spec-error (in-memory-stream-simple-error)
((position-spec :initarg :position-spec
:reader in-memory-stream-position-spec-error-position-spec))
(:documentation "Errors of this type are signalled if an erroneous
position spec is used in conjunction with FILE-POSITION."))
(define-condition external-format-condition (simple-condition)
((external-format :initarg :external-format
:initform nil
:reader external-format-condition-external-format))
(:documentation "Superclass for all conditions related to external
formats."))
(define-condition external-format-error (external-format-condition error)
()
(:documentation "Superclass for all errors related to external
formats."))
(define-condition external-format-encoding-error (external-format-error)
()
(:documentation "Errors of this type are signalled if there is an
encoding problem."))
(defun signal-encoding-error (external-format format-control &rest format-args)
"Convenience function similar to ERROR to signal conditions of type
EXTERNAL-FORMAT-ENCODING-ERROR."
(error 'external-format-encoding-error
:format-control format-control
:format-arguments format-args
:external-format external-format))
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