mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-11 00:00:49 +02:00
70 lines
2.2 KiB
Scheme
70 lines
2.2 KiB
Scheme
;;;; "ppfile.scm". Pretty print a Scheme file.
|
|
;Copyright (C) 1993, 1994 Aubrey Jaffer
|
|
;
|
|
;Permission to copy this software, to redistribute it, and to use it
|
|
;for any purpose is granted, subject to the following restrictions and
|
|
;understandings.
|
|
;
|
|
;1. Any copy made of this software must include this copyright notice
|
|
;in full.
|
|
;
|
|
;2. I have made no warrantee or representation that the operation of
|
|
;this software will be error-free, and I am under no obligation to
|
|
;provide any services, by way of maintenance, update, or otherwise.
|
|
;
|
|
;3. In conjunction with products arising from the use of this
|
|
;material, there shall be no use of my name in any advertising,
|
|
;promotional, or sales literature without prior written consent in
|
|
;each case.
|
|
|
|
(require 'pretty-print)
|
|
|
|
(define (pprint-filter-file inport filter . optarg)
|
|
((lambda (fun)
|
|
(if (input-port? inport)
|
|
(fun inport)
|
|
(call-with-input-file inport fun)))
|
|
(lambda (port)
|
|
((lambda (fun)
|
|
(let ((outport
|
|
(if (null? optarg) (current-output-port) (car optarg))))
|
|
(if (output-port? outport)
|
|
(fun outport)
|
|
(call-with-output-file outport fun))))
|
|
(lambda (export)
|
|
(let ((old-load-pathname *load-pathname*))
|
|
(set! *load-pathname* inport)
|
|
(letrec ((lp (lambda (c)
|
|
(cond ((eof-object? c))
|
|
((char-whitespace? c)
|
|
(display (read-char port) export)
|
|
(lp (peek-char port)))
|
|
((char=? #\; c)
|
|
(cmt c))
|
|
(else (sx)))))
|
|
(cmt (lambda (c)
|
|
(cond ((eof-object? c))
|
|
((char=? #\newline c)
|
|
(display (read-char port) export)
|
|
(lp (peek-char port)))
|
|
(else
|
|
(display (read-char port) export)
|
|
(cmt (peek-char port))))))
|
|
(sx (lambda ()
|
|
(let ((o (read port)))
|
|
(cond ((eof-object? o))
|
|
(else
|
|
(pretty-print (filter o) export)
|
|
;; pretty-print seems to have extra newline
|
|
(let ((c (peek-char port)))
|
|
(cond ((eqv? #\newline c)
|
|
(read-char port)
|
|
(set! c (peek-char port))))
|
|
(lp c))))))))
|
|
(lp (peek-char port)))
|
|
(set! *load-pathname* old-load-pathname)))))))
|
|
|
|
(define (pprint-file ifile . optarg)
|
|
(pprint-filter-file ifile
|
|
(lambda (x) x)
|
|
(if (null? optarg) (current-output-port) (car optarg))))
|