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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
;;;; r4rs.scm --- definitions needed for libguile to be R4RS compliant
;;;; Jim Blandy <jimb@cyclic.com> --- October 1996
;;;; Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
;;;;
;;;; This program is free software; you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation; either version 2, or (at your option)
;;;; any later version.
;;;;
;;;; This program is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;;; GNU General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU General Public License
;;;; along with this software; see the file COPYING. If not, write to
;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
;;;; Boston, MA 02111-1307 USA
;;;; apply and call-with-current-continuation
;;; We want these to be tail-recursive, so instead of using primitive
;;; procedures, we define them as closures in terms of the primitive
;;; macros @apply and @call-with-current-continuation.
(set! apply (lambda (fun . args) (@apply fun (apply:nconc2last args))))
(set-procedure-property! apply 'name 'apply)
(define (call-with-current-continuation proc)
(@call-with-current-continuation proc))
;;;; Basic Port Code
;;; Specifically, the parts of the low-level port code that are written in
;;; Scheme rather than C.
;;;
;;; WARNING: the parts of this interface that refer to file ports
;;; are going away. It would be gone already except that it is used
;;; "internally" in a few places.
;;; OPEN_READ, OPEN_WRITE, and OPEN_BOTH are used to request the
;;; proper mode to open files in.
;;;
;;; If we want to support systems that do CRLF->LF translation, like
;;; Windows, then we should have a symbol in scmconfig.h made visible
;;; to the Scheme level that we can test here, and autoconf magic to
;;; #define it when appropriate. Windows will probably just have a
;;; hand-generated scmconfig.h file.
(define OPEN_READ "r")
(define OPEN_WRITE "w")
(define OPEN_BOTH "r+")
(define *null-device* "/dev/null")
(define (open-input-file str)
(open-file str OPEN_READ))
(define (open-output-file str)
(open-file str OPEN_WRITE))
(define (open-io-file str) (open-file str OPEN_BOTH))
(define close-input-port close-port)
(define close-output-port close-port)
(define close-io-port close-port)
(define (call-with-input-file str proc)
(let* ((file (open-input-file str))
(ans (proc file)))
(close-input-port file)
ans))
(define (call-with-output-file str proc)
(let* ((file (open-output-file str))
(ans (proc file)))
(close-output-port file)
ans))
(define (with-input-from-port port thunk)
(let* ((swaports (lambda () (set! port (set-current-input-port port)))))
(dynamic-wind swaports thunk swaports)))
(define (with-output-to-port port thunk)
(let* ((swaports (lambda () (set! port (set-current-output-port port)))))
(dynamic-wind swaports thunk swaports)))
(define (with-error-to-port port thunk)
(let* ((swaports (lambda () (set! port (set-current-error-port port)))))
(dynamic-wind swaports thunk swaports)))
(define (with-input-from-file file thunk)
(let* ((nport (open-input-file file))
(ans (with-input-from-port nport thunk)))
(close-port nport)
ans))
(define (with-output-to-file file thunk)
(let* ((nport (open-output-file file))
(ans (with-output-to-port nport thunk)))
(close-port nport)
ans))
(define (with-error-to-file file thunk)
(let* ((nport (open-output-file file))
(ans (with-error-to-port nport thunk)))
(close-port nport)
ans))
(define (with-input-from-string string thunk)
(call-with-input-string string
(lambda (p) (with-input-from-port p thunk))))
(define (with-output-to-string thunk)
(call-with-output-string
(lambda (p) (with-output-to-port p thunk))))
(define (with-error-to-string thunk)
(call-with-output-string
(lambda (p) (with-error-to-port p thunk))))
(define the-eof-object (call-with-input-string "" (lambda (p) (read-char p))))
;;;; Loading
(if (not (defined? '%load-verbosely))
(define %load-verbosely #f))
(define (assert-load-verbosity v) (set! %load-verbosely v))
(define (%load-announce file)
(if %load-verbosely
(with-output-to-port (current-error-port)
(lambda ()
(display ";;; ")
(display "loading ")
(display file)
(newline)
(force-output)))))
(set! %load-hook %load-announce)
(define (load name)
(start-stack 'load-stack
(primitive-load name)))
|
