;"Template.scm" configuration template of *features* for Scheme -*-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. ;;; (software-type) should be set to the generic operating system type. ;;; UNIX, VMS, MACOS, AMIGA and MSDOS are supported. (define (software-type) 'UNIX) ;;; (scheme-implementation-type) should return the name of the scheme ;;; implementation loading this file. (define (scheme-implementation-type) 'TUTScheme) ;;; (scheme-implementation-version) should return a string describing ;;; the version the scheme implementation loading this file. (define (scheme-implementation-version) "1.0j") ;;; (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) "/share/pro/tus/scheme-app/slib/") ((VMS) "scheme$src:") ((MSDOS) "C:\\scheme\\"))) ;;; (library-vicinity) should be defined to be the pathname of the ;;; directory where files of Scheme library functions reside. (define (library-vicinity) "/share/pro/tus/scheme-app/slib/") ;;; *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 ;conforms to rev3-report ;conforms to ieee-p1178 ;conforms to sicp ;runs code from Structure and ;Interpretation of Computer ;Programs by Abelson and Sussman. rev4-optional-procedures ;LIST-TAIL, STRING->LIST, ;LIST->STRING, STRING-COPY, ;STRING-FILL!, LIST->VECTOR, ;VECTOR->LIST, and VECTOR-FILL! rev3-procedures ;LAST-PAIR, T, and NIL ; rev2-procedures ;SUBSTRING-MOVE-LEFT!, ;SUBSTRING-MOVE-RIGHT!, ;SUBSTRING-FILL!, ;STRING-NULL?, APPEND!, 1+, ;-1+, ?, >=? multiarg/and- ;/ and - can take more than 2 args. multiarg-apply ;APPLY can take more than 2 args. rationalize delay ;has DELAY and FORCE with-file ;has WITH-INPUT-FROM-FILE and ;WITH-OUTPUT-FROM-FILE string-port ;has CALL-WITH-INPUT-STRING and ;CALL-WITH-OUTPUT-STRING transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF char-ready? ; macro ;has R4RS high level macros defmacro ;has Common Lisp DEFMACRO eval ;SLIB:EVAL is single argument eval ; record ;has user defined data structures ; values ;proposed multiple values ; dynamic-wind ;proposed dynamic-wind ieee-floating-point ;conforms to full-continuation ;can return multiple times ; object-hash ;has OBJECT-HASH ; sort ; queue ;queues ; pretty-print ; object->string ; format trace ;has macros: TRACE and UNTRACE compiler ;has (COMPILER) ed ;(ED) is editor system ;posix (system ) getenv ;posix (getenv ) ; program-arguments ;returns list of strings (argv) ; Xwindows ;X support ; curses ;screen management package ; termcap ;terminal description package ; terminfo ;sysV terminal description ; current-time ;returns time in seconds since 1/1/1970 )) ;;; (OUTPUT-PORT-WIDTH ) (define (output-port-width . arg) 79) ;;; (OUTPUT-PORT-HEIGHT ) (define (output-port-height . arg) 24) ;;; (CURRENT-ERROR-PORT) (define current-error-port (let ((port (current-output-port))) (lambda () port))) ;;; (TMPNAM) makes a temporary file name. (define tmpnam (let ((cntr 100)) (lambda () (set! cntr (+ 1 cntr)) (string-append "slib_" (number->string cntr))))) ;;; (FILE-EXISTS? ) ;(define (file-exists? f) #f) ;;; (DELETE-FILE ) (define (delete-file f) (and (file-exists? f) (begin (system (string-append "rm " f)) (not (file-exists? f))))) ;;; 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 . arg) (if (null? arg) (if (not (string-port? (current-output-port))) (flush-port (current-output-port))) (if (not (string-port? (car arg))) (flush-port (car arg))))) ;;; 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)) ;;; WITH-INPUT-FROM-FILE and WITH-OUTPUT-FROM-FILE (define (with-input-from-file file thunk) (let* ((port (open-input-file file)) (retval (with-input-from-port port thunk))) (close-input-port port) retval)) (define (with-output-to-file file thunk) (let* ((port (open-output-file file)) (retval (with-output-to-port port thunk))) (close-output-port port) retval)) ;;; 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 #x1ffffff) ;;; 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) ;;; If your implementation provides R4RS macros: ;(define macro:eval slib:eval) ;(define macro:load load) (define *defmacros* (list (cons 'defmacro (lambda (name parms . body) `(set! *defmacros* (cons (cons ',name (lambda ,parms ,@body)) *defmacros*)))))) (define (defmacro? m) (and (assq m *defmacros*) #t)) (define (macroexpand-1 e) (if (pair? e) (let ((a (car e))) (cond ((symbol? a) (set! a (assq a *defmacros*)) (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 *defmacros*)) (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 base:eval slib:eval) (define (defmacro:eval x) (base:eval (defmacro:expand* x))) (define (defmacro:expand* x) (require 'defmacroexpand) (apply defmacro:expand* x '())) (define (defmacro:load ) (slib:eval-load defmacro:eval)) (define (slib:eval-load evl) (if (not (file-exists? )) (set! (string-append (scheme-file-suffix)))) (call-with-input-file (lambda (port) (let ((old-load-pathname *load-pathname*)) (set! *load-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 . args) (let ((fs '(#\a #\~))) (dolist (x (cdr args)) (set! fs (list* #\s #\~ #\space fs))) (set! fs (list* #\% #\~ #\space fs)) (error-handler (make-condition 'simple-error 'format-string (list->string (reverse fs)) 'format-arguments args)))) ;;; define these as appropriate for your system. (define slib:tab (integer->char 9)) (define slib:form-feed (integer->char 12)) ;;; 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 -1+ 1-) (define in-vicinity string-append) (define exact? _exact?) (define inexact? _inexact?) (define exact->inexact _exact->inexact) (define inexact->exact _inexact->exact) (define append! (lambda args (cond ((null? args) '()) ((null? (cdr args)) (car args)) ((null? (car args)) (apply append! (cdr args))) (else (set-cdr! (last-pair (car args)) (apply append! (cdr args))) (car args))))) (define (last-pair l) (if (pair? (cdr l)) (last-pair (cdr l)) l)) (define (macro? m) (and (macro-function m) #t)) (define (macroexpand-1 form) (if (and (pair? form) (symbol? (car form)) (macro-function (car form))) ((macro-function (car form)) form) form)) (macro (defmacro form) `(eval '(macro (,(cadr form) _args_) (apply (lambda ,@(cddr form)) (cdr _args_))))) (define gentemp (let ((*gensym-counter* -1)) (lambda () (set! *gensym-counter* (+ *gensym-counter* 1)) (string->symbol (string-append "slib:G" (number->string *gensym-counter*)))))) ; rev4-optional-procedures (define (list-tail l p) (if (< p 1) l (list-tail (cdr l) (- p 1)))) (define string-copy string-append) (define (string-fill! s obj) (do ((i (- (string-length s) 1) (- i 1))) ((< i 0)) (string-set! s i obj))) (define (vector-fill! s obj) (do ((i (- (vector-length s) 1) (- i 1))) ((< i 0)) (vector-set! s i obj))) ; To protect build-in functions find-if and list* (define tus:find-if find-if) (define tus:list* list*) ;;; Define SLIB:EXIT to be the implementation procedure to exit or ;;; return if exitting not supported. (define slib:exit (lambda args (bye))) ;;; Here for backward compatability (define (scheme-file-suffix) ".scm") ;;; (SLIB:LOAD-SOURCE "foo") should load "foo.scm" or with whatever ;;; suffix all the module files in SLIB have. See feature 'SOURCE. (define (has-suffix? str suffix) (let ((sufl (string-length suffix)) (sl (string-length str))) (and (> sl sufl) (string=? (substring str (- sl sufl) sl) suffix)))) (define (slib:load-source f) (load (if (has-suffix? f ".scm") f (string-append f ".scm")))) ;;; (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 load) ;;; At this point SLIB:LOAD must be able to load SLIB files. (define slib:load slib:load-source) (slib:load (in-vicinity (library-vicinity) "require"))