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Diffstat (limited to 'elk.init')
| -rw-r--r-- | elk.init | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/elk.init b/elk.init new file mode 100644 index 0000000..f6dded0 --- /dev/null +++ b/elk.init @@ -0,0 +1,281 @@ +;;;"elk.init" Initialisation file for SLIB for ELK 2.1 -*- Scheme -*- +;;; Copyright (C) 1991, 1992, 1993 Aubrey Jaffer. +; +;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. I have made no warrantee or representation that the operation of +;this software will be error-free, and I am under no obligation to +;provide any services, by way of maintenance, update, or otherwise. +; +;3. In conjunction with products arising from the use of this +;material, there shall be no use of my name in any advertising, +;promotional, or sales literature without prior written consent in +;each case. + +; No guarantees are given about the correctness of any of the +; choices made below. Only enough work was done to get the require +; mechanism to work correctly. +; +; Stephen J. Bevan <bevan@cs.man.ac.uk> 19920912 modified by Mike +; Sperber to work correctly with statically-linked Elk and slib1d. Be +; sure to change the library vicinities according to your local +; configuration. If you're running MS-DOS (which is possible since +; 2.1), you probably have to change this file to make everything work +; correctly. + +;;; (software-type) should be set to the generic operating system type. +;;; UNIX, VMS, MACOS, AMIGA and MS-DOS are supported. + +(define (software-type) 'UNIX) + +;;; (scheme-implementation-type) should return the name of the scheme +;;; implementation loading this file. + +(define (scheme-implementation-type) 'Elk) + +;;; (scheme-implementation-version) should return a string describing +;;; the version the scheme implementation loading this file. + +(define (scheme-implementation-version) "?2.1") + +;;; (implementation-vicinity) should be defined to be the pathname of +;;; the directory where any auxillary files to your Scheme +;;; implementation reside. + +(define (implementation-vicinity) + (case (software-type) + ((UNIX) "/usr/local/lib/elk-2.1/scm/") + ((VMS) "scheme$src:") + ((MS-DOS) "C:\\scheme\\"))) + +;;; (library-vicinity) should be defined to be the pathname of the +;;; directory where files of Scheme library functions reside. + +(define library-vicinity + (let ((library-path + (or (getenv "SCHEME_LIBRARY_PATH") + ;; Uses this path if SCHEME_LIBRARY_PATH is not defined. + (case (software-type) + ((UNIX) "/usr/local/lib/slib/") + ((VMS) "lib$scheme:") + ((MS-DOS) "C:\\SLIB\\") + (else ""))))) + (lambda () library-path))) + +;;; *features* should be set to a list of symbols describing features +;;; of this implementation. Suggestions for features are: + +(define *features* + '( + source ;can load scheme source files + ;(slib:load-source "filename") + compiled ;can load compiled files + ;(slib:load-compiled "filename") + rev4-report + ieee-p1178 + sicp + rev4-optional-procedures + rev3-procedures + rev2-procedures + multiarg/and- + multiarg-apply + delay + transcript + full-continuation + sort + format + system + getenv + program-arguments + string-port + )) + +;------------ + +(define program-arguments + (lambda () + (cons "undefined-program-name" (command-line-args)))) + +; EXACT? appears to always return #f which isn't very useful. +; Approximating it with INTEGER? at least means that some +; of the code in the library will work correctly + +(define exact? integer?) ; WARNING: redefining EXACT? + +(define (inexact? arg) + (not (exact? arg))) + +;;; (TMPNAM) makes a temporary file name. +(define tmpnam + (let ((cntr 100)) + (lambda () (set! cntr (+ 1 cntr)) + (let ((tmp (string-append "slib_" (number->string cntr)))) + (if (file-exists? tmp) (tmpnam) tmp))))) + +(require 'unix) + +; Pull in GENTENV and SYSTEM + +;;; (FILE-EXISTS? <string>) already here. + +;;; (DELETE-FILE <string>) +(define (delete-file f) (system (string-append "rm " f))) + +;------------ + +;;; (OUTPUT-PORT-WIDTH <port>) +(define (output-port-width . arg) 79) + +;;; (OUTPUT-PORT-HEIGHT <port>) +(define (output-port-height . arg) 24) + +;;; (CURRENT-ERROR-PORT) +;;; is already defined in Elk 2.1 + +;;; FORCE-OUTPUT flushes any pending output on optional arg output port +;;; use this definition if your system doesn't have such a procedure. +(define force-output flush-output-port) + +;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string +;;; port versions of CALL-WITH-*PUT-FILE. +(define (call-with-output-string f) + (let ((outsp (open-output-string))) + (f outsp) + (let ((s (get-output-string outsp))) + (close-output-port outsp) + s))) + +(define (call-with-input-string s f) + (let* ((insp (open-input-string s)) + (res (f insp))) + (close-input-port insp) + res)) + +;;; CHAR-CODE-LIMIT is one greater than the largest integer which can +;;; be returned by CHAR->INTEGER. +(define char-code-limit 256) + +;;; MOST-POSITIVE-FIXNUM is used in modular.scm +(define most-positive-fixnum 8388608) ; 23 bit integers ? + +;;; Return argument +(define (identity x) x) + +;;; If your implementation provides eval SLIB:EVAL is single argument +;;; eval using the top-level (user) environment. +(define slib:eval eval) + +(define *macros* '()) +(define (defmacro? m) (and (assq m *macros*) #t)) + +(define-macro (defmacro key pattern . body) + `(begin + (define-macro ,(cons key pattern) ,@body) + (set! *macros* (cons (cons ',key (lambda ,pattern ,@body)) *macros*)))) + +(define (macroexpand-1 e) + (if (pair? e) (let ((a (car e))) + (cond ((symbol? a) (set! a (assq a *macros*)) + (if a (apply (cdr a) (cdr e)) e)) + (else e))) + e)) + +(define (macroexpand e) + (if (pair? e) (let ((a (car e))) + (cond ((symbol? a) + (set! a (assq a *macros*)) + (if a (macroexpand (apply (cdr a) (cdr e))) e)) + (else e))) + e)) + +(define gentemp + (let ((*gensym-counter* -1)) + (lambda () + (set! *gensym-counter* (+ *gensym-counter* 1)) + (string->symbol + (string-append "slib:G" (number->string *gensym-counter*)))))) + +(define defmacro:eval slib:eval) +(define defmacro:load load) +;;; If your implementation provides R4RS macros: +;(define macro:eval slib:eval) +;(define macro:load load) + +(define (slib:eval-load <pathname> evl) + (if (not (file-exists? <pathname>)) + (set! <pathname> (string-append <pathname> (scheme-file-suffix)))) + (call-with-input-file <pathname> + (lambda (port) + (let ((old-load-pathname *load-pathname*)) + (set! *load-pathname* <pathname>) + (do ((o (read port) (read port))) + ((eof-object? o)) + (evl o)) + (set! *load-pathname* old-load-pathname))))) + +;;; define an error procedure for the library +(define slib:error error) + +;;; define these as appropriate for your system. +(define slib:tab #\tab) +(define slib:form-feed #\formfeed) + +;;; Define these if your implementation's syntax can support it and if +;;; they are not already defined. + +;(define (1+ n) (+ n 1)) +;(define (-1+ n) (+ n -1)) +;(define 1- -1+) + +(define in-vicinity string-append) + +;;; Define SLIB:EXIT to be the implementation procedure to exit or +;;; return if exitting not supported. +(define slib:exit + (lambda args + (exit (cond ((null? args) 0) + ((eqv? #t (car args)) 0) + ((and (number? (car args)) (integer? (car args))) (car args)) + (else 1))))) + +;;; Here for backward compatability +(define scheme-file-suffix + (let ((suffix (case (software-type) + ((NOSVE) "_scm") + (else ".scm")))) + (lambda () suffix))) + +;;; (SLIB:LOAD-SOURCE "foo") should load "foo.scm" or with whatever +;;; suffix all the module files in SLIB have. See feature 'SOURCE. + +; Modify the already modified _load_ so that it copes with +; environments correctly. The change involves using +; _(global-environment)_ if none is explicitly specified. +; If this is not done, definitions in files loaded by other files will +; not be loaded in the correct environment. + +(define slib:load-source + (let ((primitive-load load)) + (lambda (<pathname> . rest) + (let ((env (if (null? rest) (list (global-environment)) rest))) + (apply primitive-load <pathname> env))))) + +;;; (SLIB:LOAD-COMPILED "foo") should load the file that was produced +;;; by compiling "foo.scm" if this implementation can compile files. +;;; See feature 'COMPILED. + +(define slib:load-compiled + (let ((primitive-load load)) + (lambda (<pathname> . rest) + (apply primitive-load (string->symbol (string-append name ".o")) rest)))) + +;;; At this point SLIB:LOAD must be able to load SLIB files. + +(define slib:load slib:load-source) ;WARNING: redefining LOAD + +(slib:load (in-vicinity (library-vicinity) "require")) |