src/pcl/gray-streams-class.lisp

   1 ;;;; class definitions for the SBCL Gray streams implementation, based on the
   2 ;;;; CMU CL Gray streams implementation, based on the stream-definition-by-user
   3 ;;;; proposal by David N. Gray
   4
   5 ;;;; This software is part of the SBCL system. See the README file for
   6 ;;;; more information.
   7
   8 ;;;; This software is in the public domain and is provided with absolutely no
   9 ;;;; warranty. See the COPYING and CREDITS files for more information.
  10
  11 (in-package "SB-GRAY")
  12 \f
  13 ;;; Bootstrap the FUNDAMENTAL-STREAM class.
  14 (let ((sb-pcl::*pcl-class-boot* 'fundamental-stream))
  15   (defclass fundamental-stream (standard-object stream)
  16     ((open-p :initform t
  17              :accessor stream-open-p))
  18     #+sb-doc
  19     (:documentation "Base class for all Gray streams.")))
  20
  21 ;;; Define the stream classes.
  22 (defclass fundamental-input-stream (fundamental-stream) nil
  23   #+sb-doc
  24   (:documentation "Superclass of all Gray input streams."))
  25
  26 (defclass fundamental-output-stream (fundamental-stream) nil
  27   #+sb-doc
  28   (:documentation "Superclass of all Gray output streams."))
  29
  30 (defclass fundamental-character-stream (fundamental-stream) nil
  31   #+sb-doc
  32   (:documentation
  33    "Superclass of all Gray streams whose element-type is a subtype of character."))
  34
  35 (defclass fundamental-binary-stream (fundamental-stream) nil
  36   #+sb-doc
  37   (:documentation "Superclass of all Gray streams whose element-type
  38 is a subtype of unsigned-byte or signed-byte."))
  39
  40 (defclass fundamental-character-input-stream
  41     (fundamental-input-stream fundamental-character-stream) nil
  42   #+sb-doc
  43   (:documentation "Superclass of all Gray input streams whose element-type
  44 is a subtype of character."))
  45
  46 (defclass fundamental-character-output-stream
  47     (fundamental-output-stream fundamental-character-stream) nil
  48   #+sb-doc
  49   (:documentation "Superclass of all Gray output streams whose element-type
  50 is a subtype of character."))
  51
  52 (defclass fundamental-binary-input-stream
  53     (fundamental-input-stream fundamental-binary-stream) nil
  54   #+sb-doc
  55   (:documentation "Superclass of all Gray input streams whose element-type
  56 is a subtype of unsigned-byte or signed-byte."))
  57
  58 (defclass fundamental-binary-output-stream
  59     (fundamental-output-stream fundamental-binary-stream) nil
  60   #+sb-doc
  61   (:documentation "Superclass of all Gray output streams whose element-type
  62 is a subtype of unsigned-byte or signed-byte."))
  63 \f
  64 ;;; This is not in the Gray stream proposal, so it is left here
  65 ;;; as example code.
  66 ;;;
  67 ;;; example character input and output streams
  68 #|
  69 (defclass character-output-stream (fundamental-character-output-stream)
  70   ((lisp-stream :initarg :lisp-stream
  71                 :accessor character-output-stream-lisp-stream)))
  72
  73 (defclass character-input-stream (fundamental-character-input-stream)
  74   ((lisp-stream :initarg :lisp-stream
  75                 :accessor character-input-stream-lisp-stream)))
  76 |#