/usr/share/guile-gnome-2/gnome/gobject/event-repl.scm is in guile-gnome2-glib 2.16.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | ;; guile-gnome
;; Copyright (C) 1997 Marius Vollmer <mvo@zagadka.ping.de>
;; Copyright (C) 2003,2004 Andy Wingo <wingo at pobox dot com>
;; 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 of
;; the License, 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 program; if not, contact:
;;
;; Free Software Foundation Voice: +1-617-542-5942
;; 59 Temple Place - Suite 330 Fax: +1-617-542-2652
;; Boston, MA 02111-1307, USA gnu@gnu.org
;;; Commentary:
;;
;;An event-driven REPL, taken from guile-gtk 1.2.
;;
;;; Code:
(define-module (gnome gobject event-repl))
(define eof-object (with-input-from-string "" read))
(define-public repl-error-stack car)
(define-public repl-error-args cadr)
(define-public (make-event-repl read eval print error-reporter)
(let ((the-last-stack #f)
(stack-saved? #f)
(buffer "")
(bufpos 0)
(readeof #f))
(define (save-stack)
(cond (stack-saved?)
((not (memq 'debug (debug-options-interface)))
(set! the-last-stack #f)
(set! stack-saved? #t))
(else
(set! the-last-stack (make-stack #t lazy-dispatch 4))
(set! stack-saved? #t))))
(define (lazy-dispatch . args)
(save-stack)
(apply throw args))
(define (catch-stacked thunk handler)
(set! stack-saved? #f)
(start-stack #t
(catch #t
(lambda ()
(lazy-catch #t
thunk
lazy-dispatch))
(lambda args
(if (= (length args) 5)
(handler
(list (if stack-saved?
the-last-stack #f)
args))
(apply throw args))))))
(define (bufeof?)
(>= bufpos (string-length buffer)))
(define (discardbuf)
(set! buffer (substring buffer bufpos))
(set! bufpos 0))
(define bufport (make-soft-port
(vector #f #f #f
(lambda ()
(cond ((bufeof?)
(set! readeof #t)
#f)
(else
(let ((ch (string-ref buffer bufpos)))
(set! bufpos (1+ bufpos))
ch))))
#f)
"r"))
(define (tryread)
(set! readeof #f)
(set! bufpos 0)
(let ((val
(catch-stacked
(lambda () (read bufport))
(lambda (data)
;; when READ gets an error but has consumed the whole
;; buffer, we assume it is some kind of `premature end
;; of input` condition.
(cond ((not readeof)
(error-reporter data)
(discardbuf)))
eof-object))))
(if (not (eof-object? val))
(discardbuf))
val))
(define (evalbuf)
(let loop ((form (tryread)))
(if (not (eof-object? form))
(let* ((throw-args #f)
(ans (catch-stacked
(lambda () (eval form))
(lambda args (set! throw-args args)))))
(if throw-args
(apply error-reporter throw-args)
(print ans))
(loop (tryread))))))
(lambda (op . args)
(case op
((input)
(set! buffer (string-append buffer (car args)))
(evalbuf))
((pending?)
(not (bufeof?)))))))
(define-public (repl-input repl str)
(repl 'input str))
(define-public (repl-pending? repl)
(repl 'pending?))
(define-public (repl-display-error data . opt-port)
(let ((port (if (null? opt-port) (current-error-port) (car opt-port))))
(apply display-error (repl-error-stack data) port
(cdr (repl-error-args data)))))
(define-public (repl-display-backtrace data . opt-port)
(let ((port (if (null? opt-port) (current-error-port) (car opt-port))))
(if (repl-error-stack data)
(display-backtrace (repl-error-stack data) port))))
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