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Diffstat (limited to 'Sacla/stream.lisp')
-rw-r--r-- | Sacla/stream.lisp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/Sacla/stream.lisp b/Sacla/stream.lisp new file mode 100644 index 0000000..3d78263 --- /dev/null +++ b/Sacla/stream.lisp @@ -0,0 +1,106 @@ +;; Copyright (C) 2002-2004, Yuji Minejima <ggb01164@nifty.ne.jp> +;; ALL RIGHTS RESERVED. +;; +;; $Id: stream.lisp,v 1.7 2004/05/26 07:57:52 yuji Exp $ +;; +;; 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 COPYRIGHT HOLDERS AND CONTRIBUTORS +;; "AS IS" AND ANY EXPRESS 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 COPYRIGHT +;; OWNER OR CONTRIBUTORS 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. + +(defun terpri (&optional output-stream) + (write-char #\Newline output-stream) + nil) + +(defun read-line (&optional input-stream eof-error-p eof-value recursive-p) + (let ((str (make-array 160 + :element-type 'character + :fill-pointer 0 + :adjustable t)) + char) + (loop + (setq char (read-char input-stream eof-error-p eof-value recursive-p)) + (when (eql char eof-value) + (return (values str t))) + (vector-push-extend char str) + (when (char= char #\Newline) + (return (values str nil)))))) + + +(defun write-string (string &optional output-stream &key (start 0) end) + (unless end (setq end (length string))) + (do ((i start (1+ i))) + ((= i end) string) + (write-char (char string i) output-stream))) + +(defun write-line (string &optional output-stream &key (start 0) end) + (write-string string output-stream :start start :end end) + (write-char #\Newline output-stream) + string) + +(defun read-sequence (sequence stream &key (start 0) end) + (let ((pos start) + (read-element (if (subtypep (stream-element-type stream) 'character) + #'read-char + #'read-byte)) + new) + (do-subsequence (element sequence start end nil pos) + (unless (setq new (funcall read-element stream)) + (return pos)) + (setf element new) + (incf pos)))) + + +(defun write-sequence (sequence stream &key (start 0) end) + (let ((write-element (if (subtypep (stream-element-type stream) 'character) + #'write-char + #'write-byte))) + (do-subsequence (element sequence start end) + (funcall write-element element stream)) + sequence)) + + +(defmacro with-open-file ((stream filespec &rest options) &body body) + (let ((abortp (gensym))) + (multiple-value-bind (decls forms) (declarations-and-forms body) + `(let ((,var (open filespec ,@options)) + (,abortp t)) + ,@decls + (unwind-protect + (multiple-value-prog1 + (progn ,@forms) + (setq ,abortp nil)) + (when ,var + (close ,var :abort ,abortp))))))) + +(defmacro with-open-stream ((var stream) &body body) + (let ((abortp (gensym))) + (multiple-value-bind (decls forms) (declarations-and-forms body) + `(let ((,var ,stream) + (,abortp t)) + ,@decls + (unwind-protect + (multiple-value-prog1 + (progn ,@forms) + (setq ,abortp nil)) + (when ,var + (close ,var :abort ,abortp))))))) + |