home *** CD-ROM | disk | FTP | other *** search
- ;; Filename : sigscheme-init.scm
- ;; About : Initialization file for SigScheme
- ;;
- ;; Copyright (c) 2007-2008 SigScheme Project <uim-en AT googlegroups.com>
- ;;
- ;; All rights reserved.
- ;;
- ;; Redistribution and use in source and binary forms, with or without
- ;; modification, are permitted provided that the following conditions
- ;; are met:
- ;;
- ;; 1. Redistributions of source code must retain the above copyright
- ;; notice, this list of conditions and the following disclaimer.
- ;; 2. 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.
- ;; 3. Neither the name of authors nor the names of its contributors
- ;; may be used to endorse or promote products derived from this software
- ;; without specific prior written permission.
- ;;
- ;; 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 HOLDERS 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.
-
-
- (define %with-guarded-char-codec
- (lambda (thunk)
- (let ((orig-codec (%%current-char-codec))
- (thunk-codec (%%current-char-codec)))
- (dynamic-wind
- (lambda ()
- (%%set-current-char-codec! thunk-codec))
- thunk
- (lambda ()
- (set! thunk-codec (%%current-char-codec))
- (%%set-current-char-codec! orig-codec))))))
-
- (define with-char-codec
- (lambda (codec thunk)
- (%with-guarded-char-codec
- (lambda ()
- (%%set-current-char-codec! codec)
- (thunk)))))
-
- ;; Preserve original C implementation.
- (define %%load load)
-
- ;; Recover original char codec when an error is occurred on loading.
- (define load
- (if (provided? "multibyte-char")
- (lambda (file)
- (%with-guarded-char-codec
- (lambda ()
- (%%load file))))
- %%load))
-
- ;; R5RS
- (define call-with-input-file
- (lambda (filename proc)
- (let* ((port (open-input-file filename))
- (res (proc port)))
- (close-input-port port)
- res)))
-
- ;; R5RS
- (define call-with-output-file
- (lambda (filename proc)
- (let* ((port (open-output-file filename))
- (res (proc port)))
- (close-output-port port)
- res)))
-
- ;; R5RS
- (define with-input-from-file
- (lambda (file thunk)
- (let ((orig-port (current-input-port))
- (thunk-port (current-input-port)))
- (dynamic-wind
- (lambda ()
- (%%set-current-input-port! thunk-port))
- (lambda ()
- (let* ((port (open-input-file file))
- (res (begin
- (set! thunk-port port)
- (%%set-current-input-port! thunk-port)
- (thunk))))
- (close-input-port port)
- res))
- (lambda ()
- (%%set-current-input-port! orig-port))))))
-
- ;; R5RS
- (define with-output-to-file
- (lambda (file thunk)
- (let ((orig-port (current-output-port))
- (thunk-port (current-output-port)))
- (dynamic-wind
- (lambda ()
- (%%set-current-output-port! thunk-port))
- (lambda ()
- (let* ((port (open-output-file file))
- (res (begin
- (set! thunk-port port)
- (%%set-current-output-port! thunk-port)
- (thunk))))
- (close-output-port port)
- res))
- (lambda ()
- (%%set-current-output-port! orig-port))))))
-