conditions.lisp - clic - Clic is an command line interactive client for gopher written in Common LISP
(HTM) git clone git://bitreich.org/clic/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/clic/
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---
conditions.lisp (4735B)
---
1 ;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: FLEXI-STREAMS; Base: 10 -*-
2 ;;; $Header: /usr/local/cvsrep/flexi-streams/conditions.lisp,v 1.9 2008/05/25 22:23:58 edi Exp $
3
4 ;;; Copyright (c) 2005-2008, Dr. Edmund Weitz. All rights reserved.
5
6 ;;; Redistribution and use in source and binary forms, with or without
7 ;;; modification, are permitted provided that the following conditions
8 ;;; are met:
9
10 ;;; * Redistributions of source code must retain the above copyright
11 ;;; notice, this list of conditions and the following disclaimer.
12
13 ;;; * Redistributions in binary form must reproduce the above
14 ;;; copyright notice, this list of conditions and the following
15 ;;; disclaimer in the documentation and/or other materials
16 ;;; provided with the distribution.
17
18 ;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
19 ;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 ;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 ;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 ;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 ;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
24 ;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 ;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 ;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 ;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 ;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30 (in-package :flexi-streams)
31
32 (define-condition flexi-stream-error (stream-error)
33 ()
34 (:documentation "Superclass for all errors related to flexi
35 streams."))
36
37 (define-condition flexi-stream-simple-error (flexi-stream-error simple-condition)
38 ()
39 (:documentation "Like FLEXI-STREAM-ERROR but with formatting
40 capabilities."))
41
42 (define-condition flexi-stream-element-type-error (flexi-stream-error)
43 ((element-type :initarg :element-type
44 :reader flexi-stream-element-type-error-element-type))
45 (:report (lambda (condition stream)
46 (format stream "Element type ~S not allowed."
47 (flexi-stream-element-type-error-element-type condition))))
48 (:documentation "Errors of this type are signalled if the flexi
49 stream has a wrong element type."))
50
51 (define-condition flexi-stream-out-of-sync-error (flexi-stream-error)
52 ()
53 (:report (lambda (condition stream)
54 (declare (ignore condition))
55 (format stream "Stream out of sync from previous
56 lookahead, couldn't rewind.")))
57 (:documentation "This can happen if you're trying to write to an IO
58 stream which had prior to that `looked ahead' while reading and now
59 can't `rewind' to the octet where you /should/ be."))
60
61 (define-condition in-memory-stream-error (stream-error)
62 ()
63 (:documentation "Superclass for all errors related to
64 IN-MEMORY streams."))
65
66 (define-condition in-memory-stream-simple-error (in-memory-stream-error simple-condition)
67 ()
68 (:documentation "Like IN-MEMORY-STREAM-ERROR but with formatting
69 capabilities."))
70
71 (define-condition in-memory-stream-closed-error (in-memory-stream-error)
72 ()
73 (:report (lambda (condition stream)
74 (format stream "~S is closed."
75 (stream-error-stream condition))))
76 (:documentation "An error that is signalled when someone is trying
77 to read from or write to a closed IN-MEMORY stream."))
78
79 (define-condition in-memory-stream-position-spec-error (in-memory-stream-simple-error)
80 ((position-spec :initarg :position-spec
81 :reader in-memory-stream-position-spec-error-position-spec))
82 (:documentation "Errors of this type are signalled if an erroneous
83 position spec is used in conjunction with FILE-POSITION."))
84
85 (define-condition external-format-condition (simple-condition)
86 ((external-format :initarg :external-format
87 :initform nil
88 :reader external-format-condition-external-format))
89 (:documentation "Superclass for all conditions related to external
90 formats."))
91
92 (define-condition external-format-error (external-format-condition error)
93 ()
94 (:documentation "Superclass for all errors related to external
95 formats."))
96
97 (define-condition external-format-encoding-error (external-format-error)
98 ()
99 (:documentation "Errors of this type are signalled if there is an
100 encoding problem."))
101
102 (defun signal-encoding-error (external-format format-control &rest format-args)
103 "Convenience function similar to ERROR to signal conditions of type
104 EXTERNAL-FORMAT-ENCODING-ERROR."
105 (error 'external-format-encoding-error
106 :format-control format-control
107 :format-arguments format-args
108 :external-format external-format))