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SCL support (thanks to Douglas Crosher). Includes support for

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implementations where URIs are valid namestrings, and a mode
        where normal streams are used instead of xstreams and ystreams
        (albeit both SCL-specific at this point).
This commit is contained in:
dlichteblau
2007-06-16 11:27:19 +00:00
parent b07409f2c2
commit 4a6ce6fc01
3 changed files with 305 additions and 1 deletions
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6
package.lisp
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@ -79,7 +79,11 @@
#:make-string-ystream/utf8
;; #+rune-is-integer
#:make-character-stream-ystream/utf8
#:runes-to-utf8/adjustable-string))
#:runes-to-utf8/adjustable-string
#:rod-to-utf8-string
#:utf8-string-to-rod
#:make-octet-input-stream))
(defpackage :utf8-runes
(:use :cl)

253
stream-scl.lisp Normal file
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@ -0,0 +1,253 @@
;;; -*- Mode: Lisp; Syntax: Common-Lisp; readtable: runes; Encoding: utf-8; -*-
;;; ---------------------------------------------------------------------------
;;; Title: Fast streams
;;; Created: 1999-07-17
;;; Author: Douglas Crosher
;;; License: Lisp-LGPL (See file COPYING for details).
;;; ---------------------------------------------------------------------------
;;; (c) copyright 2007 by Douglas Crosher
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
(in-package :runes)
(eval-when (:compile-toplevel :load-toplevel :execute)
(defparameter *fast* '(optimize (speed 3) (safety 3))))
(deftype runes-encoding:encoding-error ()
'ext:character-conversion-error)
;;; xstream
(eval-when (:compile-toplevel :load-toplevel :execute)
(defclass xstream (ext:character-stream)
((name :initarg :name :initform nil
:accessor xstream-name)
(column :initarg :column :initform 0)
(line :initarg :line :initform 1)
(unread-column :initarg :unread-column :initform 0)))
(defclass eol-conversion-xstream (lisp::eol-conversion-input-stream xstream)
())
) ; eval-when
(defun make-eol-conversion-xstream (source-stream)
"Returns a character stream that conversion CR-LF pairs and lone CR
characters into single linefeed character."
(declare (type stream source-stream))
(let ((stream (ext:make-eol-conversion-stream source-stream
:input t
:close-stream-p t)))
(change-class stream 'eol-conversion-xstream)))
(definline xstream-p (stream)
(typep stream 'xstream))
(defun close-xstream (input)
(close input))
(definline read-rune (input)
(declare (type stream input)
(inline read-char)
#.*fast*)
(let ((char (read-char input nil :eof)))
(cond ((member char '(#\UFFFE #\UFFFF))
;; These characters are illegal within XML documents.
(simple-error 'ext:character-conversion-error
"~@<Illegal XML document character: ~S~:@>" char))
((eql char #\linefeed)
(setf (slot-value input 'unread-column) (slot-value input 'column))
(setf (slot-value input 'column) 0)
(incf (the kernel:index (slot-value input 'line))))
(t
(incf (the kernel:index (slot-value input 'column)))))
char))
(definline peek-rune (input)
(declare (type stream input)
(inline peek-char)
#.*fast*)
(peek-char nil input nil :eof))
(definline consume-rune (input)
(declare (type stream input)
(inline read-rune)
#.*fast*)
(read-rune input)
nil)
(definline unread-rune (rune input)
(declare (type stream input)
(inline unread-char)
#.*fast*)
(unread-char rune input)
(cond ((eql rune #\linefeed)
(setf (slot-value input 'column) (slot-value input 'unread-column))
(setf (slot-value input 'unread-column) 0)
(decf (the kernel:index (slot-value input 'line))))
(t
(decf (the kernel:index (slot-value input 'column)))))
nil)
(defun fread-rune (input)
(read-rune input))
(defun fpeek-rune (input)
(peek-rune input))
(defun xstream-position (input)
(file-position input))
(defun runes-encoding:find-encoding (encoding)
encoding)
(defun make-xstream (os-stream &key name
(speed 8192)
(initial-speed 1)
(initial-encoding :guess))
(declare (ignore speed))
(assert (eql initial-speed 1))
(assert (eq initial-encoding :guess))
(let* ((stream (ext:make-xml-character-conversion-stream os-stream
:input t
:close-stream-p t))
(xstream (make-eol-conversion-xstream stream)))
(setf (xstream-name xstream) name)
xstream))
(defclass xstream-string-input-stream (lisp::string-input-stream xstream)
())
(defun make-rod-xstream (string &key name)
(declare (type string string))
(let ((stream (make-string-input-stream string)))
(change-class stream 'xstream-string-input-stream :name name)))
;;; already at 'full speed' so just return the buffer size.
(defun set-to-full-speed (stream)
(length (ext:stream-in-buffer stream)))
(defun xstream-speed (stream)
(length (ext:stream-in-buffer stream)))
(defun xstream-line-number (stream)
(slot-value stream 'line))
(defun xstream-column-number (stream)
(slot-value stream 'column))
(defun xstream-encoding (stream)
(stream-external-format stream))
;;; the encoding will have already been detected, but it is checked against the
;;; declared encoding here.
(defun (setf xstream-encoding) (declared-encoding stream)
(let* ((initial-encoding (xstream-encoding stream))
(canonical-encoding
(cond ((and (eq initial-encoding :utf-16le)
(member declared-encoding '(:utf-16 :utf16 :utf-16le :utf16le)
:test 'string-equal))
:utf-16le)
((and (eq initial-encoding :utf-16be)
(member declared-encoding '(:utf-16 :utf16 :utf-16be :utf16be)
:test 'string-equal))
:utf-16be)
((and (eq initial-encoding :ucs-4be)
(member declared-encoding '(:ucs-4 :ucs4 :ucs-4be :ucs4be)
:test 'string-equal))
:ucs4-be)
((and (eq initial-encoding :ucs-4le)
(member declared-encoding '(:ucs-4 :ucs4 :ucs-4le :ucs4le)
:test 'string-equal))
:ucs4-le)
(t
declared-encoding))))
(unless (string-equal initial-encoding canonical-encoding)
(warn "Unable to change xstream encoding from ~S to ~S (~S)~%"
initial-encoding declared-encoding canonical-encoding))
declared-encoding))
;;; ystream - a run output stream.
(deftype ystream () 'stream)
(defun ystream-column (stream)
(ext:line-column stream))
(definline write-rune (rune stream)
(declare (inline write-char))
(write-char rune stream))
(defun write-rod (rod stream)
(declare (type rod rod)
(type stream stream))
(write-string rod stream))
(defun make-rod-ystream ()
(make-string-output-stream))
(defun close-ystream (stream)
(etypecase stream
(ext:string-output-stream
(get-output-stream-string stream))
(ext:character-conversion-output-stream
(let ((target (slot-value stream 'stream)))
(close stream)
(if (typep target 'ext:byte-output-stream)
(ext:get-output-stream-bytes target)
stream)))))
;;;; CHARACTER-STREAM-YSTREAM
(defun make-character-stream-ystream (target-stream)
target-stream)
;;;; OCTET-VECTOR-YSTREAM
(defun make-octet-vector-ystream ()
(let ((target (ext:make-byte-output-stream)))
(ext:make-character-conversion-stream target :output t
:external-format :utf-8
:close-stream-p t)))
;;;; OCTET-STREAM-YSTREAM
(defun make-octet-stream-ystream (os-stream)
(ext:make-character-conversion-stream os-stream :output t
:external-format :utf-8
:close-stream-p t))
;;;; helper functions
(defun rod-to-utf8-string (rod)
(ext:make-string-from-bytes (ext:make-bytes-from-string rod :utf8)
:iso-8859-1))
(defun utf8-string-to-rod (str)
(let ((bytes (map '(vector (unsigned-byte 8)) #'char-code str)))
(ext:make-string-from-bytes bytes :utf-8)))
(defun make-octet-input-stream (octets)
(ext:make-byte-input-stream octets))

47
ystream.lisp
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@ -248,3 +248,50 @@
(defmethod close-ystream ((ystream string-ystream/utf8))
(get-output-stream-string (ystream-os-stream ystream))))
;;;; helper functions
(defun rod-to-utf8-string (rod)
(let ((out (make-buffer :element-type 'character)))
(runes-to-utf8/adjustable-string out rod (length rod))
out))
(defun utf8-string-to-rod (str)
(let* ((bytes (map '(vector (unsigned-byte 8)) #'char-code str))
(buffer (make-array (length bytes) :element-type '(unsigned-byte 16)))
(n (runes-encoding:decode-sequence
:utf-8 bytes 0 (length bytes) buffer 0 0 nil))
(result (make-array n :element-type 'rune)))
(map-into result #'code-rune buffer)
result))
(defclass octet-input-stream
(trivial-gray-stream-mixin fundamental-binary-input-stream)
((octets :initarg :octets)
(pos :initform 0)))
(defmethod close ((stream octet-input-stream) &key abort)
(declare (ignore abort))
(open-stream-p stream))
(defmethod stream-read-byte ((stream octet-input-stream))
(with-slots (octets pos) stream
(if (>= pos (length octets))
:eof
(prog1
(elt octets pos)
(incf pos)))))
(defmethod stream-read-sequence
((stream octet-input-stream) sequence start end &key &allow-other-keys)
(with-slots (octets pos) stream
(let* ((length (min (- end start) (- (length octets) pos)))
(end1 (+ start length))
(end2 (+ pos length)))
(replace sequence octets :start1 start :end1 end1 :start2 pos :end2 end2)
(setf pos end2)
end1)))
(defun make-octet-input-stream (octets)
(make-instance 'octet-input-stream :octets octets))