1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
;;; editline.scm: libedit interface
;;;
;;; Copyright (c) 2007-2009 uim Project http://code.google.com/p/uim/
;;;
;;; 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.
(require-extension (srfi 0 6 23 34))
;;(require-extension (srfi 13)) ;; string-prefix?
(define *editline-prompt-beginning* "> ")
(define *editline-prompt-succeeding* "")
(define %*editline-reading* #f)
(define editline-prompt
(lambda ()
(if %*editline-reading*
*editline-prompt-succeeding*
*editline-prompt-beginning*)))
(cond-expand
(sigscheme
(define %editline-eof-error?
(lambda (err)
(and (%%error-object? err)
(string-prefix? "in read: EOF " (cadr err)))))) ;; XXX
(else
(error "cannot detect EOF error")))
(define %editline-partial-read
(lambda args
(guard (err
((%editline-eof-error? err) err))
(apply read args))))
(define editline-read
(let ((p (open-input-string ""))
(buf ""))
(lambda ()
(let ((expr (%editline-partial-read p)))
(if (or (eof-object? expr)
(%editline-eof-error? expr))
(let ((line (editline-readline)))
(if (eof-object? line)
(if (%editline-eof-error? expr)
(raise expr)
line)
(begin
(set! buf (if (%editline-eof-error? expr)
(string-append buf line)
line))
(set! p (open-input-string buf))
(set! %*editline-reading* #t)
(editline-read))))
(begin
(set! buf "")
(set! %*editline-reading* #f)
expr))))))
|
