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 "the 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 "a superclass of all Gray input streams"))
  25
  26 (defclass fundamental-output-stream (fundamental-stream) nil
  27   #+sb-doc
  28   (:documentation "a superclass of all Gray output streams"))
  29
  30 (defclass fundamental-character-stream (fundamental-stream) nil
  31   #+sb-doc
  32   (:documentation "a superclass of all Gray streams whose element-type is a subtype of character"))
  33
  34 (defclass fundamental-binary-stream (fundamental-stream) nil
  35   #+sb-doc
  36   (:documentation "a superclass of all Gray streams whose element-type is a subtype of unsigned-byte or signed-byte"))
  37
  38 (defclass fundamental-character-input-stream
  39     (fundamental-input-stream fundamental-character-stream) nil
  40   #+sb-doc
  41   (:documentation "a superclass of all Gray input streams whose element-type is a subtype of character"))
  42
  43 (defclass fundamental-character-output-stream
  44     (fundamental-output-stream fundamental-character-stream) nil
  45   #+sb-doc
  46   (:documentation "a superclass of all Gray output streams whose element-type is a subtype of character"))
  47
  48 (defclass fundamental-binary-input-stream
  49     (fundamental-input-stream fundamental-binary-stream) nil
  50   #+sb-doc
  51   (:documentation "a superclass of all Gray input streams whose element-type is a subtype of unsigned-byte or signed-byte"))
  52
  53 (defclass fundamental-binary-output-stream
  54     (fundamental-output-stream fundamental-binary-stream) nil
  55     #+sb-doc
  56   (:documentation "a superclass of all Gray output streams whose element-type is a subtype of unsigned-byte or signed-byte"))
  57 \f
  58 ;;; This is not in the Gray stream proposal, so it is left here
  59 ;;; as example code.
  60 ;;;
  61 ;;; example character input and output streams
  62 #|
  63 (defclass character-output-stream (fundamental-character-output-stream)
  64   ((lisp-stream :initarg :lisp-stream
  65                 :accessor character-output-stream-lisp-stream)))
  66
  67 (defclass character-input-stream (fundamental-character-input-stream)
  68   ((lisp-stream :initarg :lisp-stream
  69                 :accessor character-input-stream-lisp-stream)))
  70 |#