From 78bc5d1320edb41d3c0063b976c354520165829d Mon Sep 17 00:00:00 2001 From: Chris Hanson Date: Tue, 26 Nov 1991 07:45:00 +0000 Subject: [PATCH] Initial revision --- v7/src/runtime/usrint.scm | 232 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 232 insertions(+) create mode 100644 v7/src/runtime/usrint.scm diff --git a/v7/src/runtime/usrint.scm b/v7/src/runtime/usrint.scm new file mode 100644 index 000000000..ab00c9aa9 --- /dev/null +++ b/v7/src/runtime/usrint.scm @@ -0,0 +1,232 @@ +#| -*-Scheme-*- + +$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/runtime/usrint.scm,v 1.1 1991/11/26 07:45:00 cph Exp $ + +Copyright (c) 1991 Massachusetts Institute of Technology + +This material was developed by the Scheme project at the Massachusetts +Institute of Technology, Department of Electrical Engineering and +Computer Science. 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. Users of this software agree to make their best efforts (a) to +return to the MIT Scheme project any improvements or extensions that +they make, so that these may be included in future releases; and (b) +to inform MIT of noteworthy uses of this software. + +3. All materials developed as a consequence of the use of this +software shall duly acknowledge such use, in accordance with the usual +standards of acknowledging credit in academic research. + +4. MIT has made no warrantee or representation that the operation of +this software will be error-free, and MIT is under no obligation to +provide any services, by way of maintenance, update, or otherwise. + +5. In conjunction with products arising from the use of this material, +there shall be no use of the name of the Massachusetts Institute of +Technology nor of any adaptation thereof in any advertising, +promotional, or sales literature without prior written consent from +MIT in each case. |# + +;;;; User Interface +;;; package: (runtime user-interface) + +(declare (usual-integrations)) + +;;;; Prompting + +(define (prompt-for-command-expression prompt #!optional port) + (let ((port (if (default-object? port) (nearest-cmdl/port) port))) + (let ((operation (port/operation port 'PROMPT-FOR-COMMAND-EXPRESSION))) + (if operation + (operation port prompt) + (default/prompt-for-command-expression port prompt))))) + +(define (default/prompt-for-command-expression port prompt) + (port/with-output-terminal-mode port 'COOKED + (lambda () + (fresh-line port) + (newline port) + (write-string prompt port) + (write-string " " port) + (flush-output port))) + (port/with-input-terminal-mode port 'COOKED + (lambda () + (read port)))) + +(define (prompt-for-expression prompt #!optional port) + (let ((port (if (default-object? port) (nearest-cmdl/port) port))) + (let ((operation (port/operation port 'PROMPT-FOR-EXPRESSION))) + (if operation + (operation port prompt) + (default/prompt-for-expression port prompt))))) + +(define (default/prompt-for-expression port prompt) + (default/prompt-for-command-expression port (string-append prompt ":"))) + +(define (prompt-for-evaluated-expression prompt #!optional environment port) + (hook/repl-eval (prompt-for-expression prompt + (if (default-object? port) + (nearest-cmdl/port) + port)) + (if (default-object? environment) + (nearest-repl/environment) + environment) + (nearest-repl/syntax-table))) + +(define (prompt-for-command-char prompt #!optional port) + (let ((port (if (default-object? port) (nearest-cmdl/port) port))) + (let ((operation (port/operation port 'PROMPT-FOR-COMMAND-CHAR))) + (if operation + (operation port prompt) + (default/prompt-for-command-char port prompt))))) + +(define (default/prompt-for-command-char port prompt) + (port/with-output-terminal-mode port 'COOKED + (lambda () + (port/with-input-terminal-mode port 'RAW + (lambda () + (fresh-line port) + (newline port) + (write-string prompt port) + (write-string " " port) + (flush-output port) + (let loop () + (let ((char (read-char port))) + (if (eqv? #\newline char) + (loop) + (begin + (write-char char port) + (flush-output port) + char))))))))) + +(define (prompt-for-confirmation prompt #!optional port) + (let ((port (if (default-object? port) (nearest-cmdl/port) port))) + (let ((operation (port/operation port 'PROMPT-FOR-CONFIRMATION))) + (if operation + (operation port prompt) + (default/prompt-for-confirmation port prompt))))) + +(define (default/prompt-for-confirmation port prompt) + (let ((prompt (string-append prompt " (y or n)? "))) + (port/with-output-terminal-mode port 'COOKED + (lambda () + (port/with-input-terminal-mode port 'RAW + (lambda () + (fresh-line port) + (let loop () + (newline port) + (write-string prompt port) + (flush-output port) + (let ((char (read-char port))) + (case char + ((#\y #\Y #\space) + (write-string "Yes" port) + (flush-output port) + true) + ((#\n #\N #\rubout) + (write-string "No" port) + (flush-output port) + false) + ((#\newline) + (loop)) + (else + (write char port) + (beep port) + (flush-output port) + (loop))))))))))) + +;;;; Debugger Support + +(define (port/debugger-failure port message) + (let ((operation (port/operation port 'DEBUGGER-FAILURE))) + (if operation + (operation port message) + (default/debugger-failure port message)))) + +(define (default/debugger-failure port message) + (beep port) + (default/debugger-message port message)) + +(define (port/debugger-message port message) + (let ((operation (port/operation port 'DEBUGGER-MESSAGE))) + (if operation + (operation port message) + (default/debugger-message port message)))) + +(define (default/debugger-message port message) + (fresh-line port) + (write-string message port)) + +(define (port/debugger-presentation port thunk) + (let ((operation (port/operation port 'DEBUGGER-PRESENTATION))) + (if operation + (operation port thunk) + (default/debugger-presentation port thunk)))) + +(define (default/debugger-presentation port thunk) + (fresh-line port) + (thunk)) + +;;;; Miscellaneous Hooks + +(define (port/write-result port value hash-number) + (let ((operation (port/operation port 'WRITE-RESULT))) + (if operation + (operation port value hash-number) + (default/write-result port value hash-number)))) + +(define (default/write-result port object hash-number) + (port/with-output-terminal-mode port 'COOKED + (lambda () + (fresh-line port) + (write-string ";" port) + (if (undefined-value? object) + (write-string "No value" port) + (begin + (write-string "Value" port) + (if hash-number + (begin + (write-string " " port) + (write hash-number port))) + (write-string ": " port) + (write object port)))))) + +(define (port/set-default-directory port directory) + (let ((operation (port/operation port 'SET-DEFAULT-DIRECTORY))) + (if operation + (operation port directory)))) + +(define (port/set-default-environment port environment) + (let ((operation (port/operation port 'SET-DEFAULT-ENVIRONMENT))) + (if operation + (operation port environment)))) + +(define (port/set-default-syntax-table port syntax-table) + (let ((operation (port/operation port 'SET-DEFAULT-SYNTAX-TABLE))) + (if operation + (operation port syntax-table)))) + +(define (port/gc-start port) + (let ((operation (port/operation port 'GC-START))) + (if operation + (operation port)))) + +(define (port/gc-finish port) + (let ((operation (port/operation port 'GC-FINISH))) + (if operation + (operation port)))) + +(define (port/read-start port) + (let ((operation (port/operation port 'READ-START))) + (if operation + (operation port)))) + +(define (port/read-finish port) + (let ((operation (port/operation port 'READ-FINISH))) + (if operation + (operation port)))) \ No newline at end of file -- 2.25.1