From 7deb61a344332f61feeedd3c82b89ada852cb493 Mon Sep 17 00:00:00 2001 From: Stephen Adams Date: Mon, 3 Oct 1994 17:31:32 +0000 Subject: [PATCH] Initial revision --- v7/src/runtime/optiondb.scm | 81 +++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 v7/src/runtime/optiondb.scm diff --git a/v7/src/runtime/optiondb.scm b/v7/src/runtime/optiondb.scm new file mode 100644 index 000000000..315dcaa2d --- /dev/null +++ b/v7/src/runtime/optiondb.scm @@ -0,0 +1,81 @@ +#| -*-Scheme-*- + +$Id: optiondb.scm,v 1.1 1994/10/03 17:31:32 adams Exp $ + +Copyright (c) 1994 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. |# +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; +;; This file contains Scheme code to define a set of load options. Each +;; time a new (not-yet-loaded) load option is requested, this file is +;; loaded into a fresh environment which has the system global +;; environment as parent. +;; +;; Procedures used for defining load options: +;; +;; (DEFINE-LOAD-OPTION 'NAME loader loader ...) +;; Defines a load option (NAME) which is loaded by the execution of its +;; loaders. Loaders are executed left to right. Loaders are thunks. +;; +;; (STANDARD-OPTION-LOADER 'PACKAGE-NAME 'EXPR file file ...) +;; Creates a loader that loads the files (strings relative to +;; $MITSCHEME_LIBRARY_PATH/options) into the environment of the +;; package named PACKAGE-NAME, and then evaluates EXPR in that load +;; environment. If EXPR is #F of course evaluating it has no effect. +;; +;; (FURTHER-LOAD-OPTIONS EXPR) +;; EXPR is the place to look next for the load options. Useful objects +;; are STANDARD-LOAD-OPTIONS (load options supplied with the +;; MIT-Scheme distribution) and LOCAL-LOAD-OPTIONS (load options +;; supplied for every user of your architecture at your site). If +;; not specified, or is #F, then this file is the last options +;; database that is searched. + +(declare (usual-integrations)) + +;; Standard load options are defined like this: + +(define-load-option 'ARITHMETIC-INTERFACE + (standard-option-loader '(RUNTIME NUMBER INTERFACE) #F "numint")) + +;; We can use programming to make the definitions less noisy and tedious: + +(for-each + (lambda (spec) + (define-load-option (car spec) (apply standard-option-loader (cdr spec)))) + '((FORMAT (RUNTIME FORMAT) (INITIALIZE-PACKAGE!) "format") + (COMPRESS (RUNTIME COMPRESS) #F "cpress") + (HASH-TABLE (RUNTIME HASH-TABLE) (INITIALIZE-PACKAGE!) "hashtb") + (RB-TREE (RUNTIME RB-TREE) #F "rbtree") + (WT-TREE (RUNTIME WT-TREE) #F "wttree") + (SUBPROCESS (RUNTIME SUBPROCESS) (INITIALIZE-PACKAGE!) "process"))) + +(define-load-option 'DOSPROCESS + (standard-option-loader '() #F "dosproc")) -- 2.25.1