65 lines
2.4 KiB
Scheme
65 lines
2.4 KiB
Scheme
#| -*-Scheme-*-
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Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
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1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
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2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016,
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2017, 2018, 2019, 2020 Massachusetts Institute of Technology
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This file is part of MIT/GNU Scheme.
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MIT/GNU Scheme is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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MIT/GNU Scheme is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with MIT/GNU Scheme; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
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USA.
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|#
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;;;; Runtime-system adapters
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;;; package: (edwin adapters)
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;;; This file contains adapters that bridge between Edwin and the runtime
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;;; system. These are necessary because Edwin has assumptions about the
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;;; behavior of the runtime system that are no longer valid. Since some of
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;;; these assumptions are deeply rooted, it's easier to adapt around them rather
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;;; than rewrite Edwin.
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;;; The most critical assumption is that Edwin relies on an older model of
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;;; strings, in which each character is a byte, and the default coding is ISO
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;;; 8859-1, while the runtime system now supports full Unicode and uses a
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;;; default coding of UTF 8. Most of that is taken care of by the (edwin
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;;; string) package, which contains a copy of the runtime's old string
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;;; implementation. Other things, like file I/O, are handled here.
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(define (call-with-file-adapter procedure)
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(lambda (pathname receiver)
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(procedure pathname
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(lambda (port)
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(port/set-coding port 'iso-8859-1)
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(receiver port)))))
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(define edwin:call-with-append-file
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(call-with-file-adapter call-with-append-file))
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(define edwin:call-with-input-file
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(call-with-file-adapter call-with-input-file))
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(define edwin:call-with-output-file
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(call-with-file-adapter call-with-output-file))
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(define char-set:graphic
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(char-set-union (ucs-range->char-set #x20 #x7F)
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(ucs-range->char-set #xA0 #x100)))
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