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;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: CL-UNICODE; Base: 10 -*-
;;; $Header: /usr/local/cvsrep/cl-unicode/conditions.lisp,v 1.4 2012-05-04 21:17:44 edi Exp $

;;; Copyright (c) 2008-2012, 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 :cl-unicode)

(define-condition unicode-error (error)
  ()
  (:documentation "All errors signalled by CL-UNICODE are of this type."))

(define-condition simple-unicode-error (unicode-error simple-condition)
  ()
  (:documentation "A subclass of UNICODE-ERROR where the caller can
supply a format control and format arguments."))

(defun signal-unicode-error (format-control &rest format-arguments)
  "Utility function to signal conditions of type SIMPLE-UNICODE-ERROR."
  (error 'simple-unicode-error
          :format-control format-control
          :format-arguments format-arguments))

(define-condition character-not-found (unicode-error reader-error)
  ((name :initarg :name))
  (:report (lambda (condition stream)
             (with-slots (name)
                 condition
               (format stream "There is no character named ~S." name))))
  (:documentation "Error signalled by UNICODE-NAME-READER if a
character wasn't found."))