scsh-0.5/alt/config.scm

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1995-10-13 23:34:21 -04:00
; Copyright (c) 1993, 1994 Richard Kelsey and Jonathan Rees. See file COPYING.
; Stub support for DEFINE-PACKAGE and DEFINE-INTERFACE macros.
; Interfaces are ignored. Only dependencies are significant.
(define (load-configuration filename . rest)
(let ((save filename))
(dynamic-wind (lambda () (set! *source-file-name* filename))
(lambda ()
(apply load filename rest))
(lambda () (set! *source-file-name* save)))))
(define (%file-name%) *source-file-name*)
(define *source-file-name* "")
; This is used to generate file lists that are "included" in "makefiles."
(define (write-file-names target . stuff)
(call-with-output-file target
(lambda (port)
(display "Writing ") (display target) (newline)
(display "#### This file was generated automatically. ####"
port)
(newline port)
(let ((mumble (lambda (name filenames)
(newline port)
(display name port)
(display " = " port)
(for-each (lambda (filename)
(display filename port)
(display " " port))
filenames)
(newline port))))
(do ((stuff stuff (cddr stuff)))
((null? stuff))
(mumble (car stuff) (cadr stuff)))
;(mumble 'all-files (reverse *all-files*))
))))
; --------------------
(define (make-indirect-interface name thunk)
(thunk))
(define (make-simple-interface name items)
(cons 'export items))
(define (make-compound-interface name . sigs)
(cons 'compound-interface sigs))
; Structures are views into packages.
; In this implementation, interface information is completely ignored.
(define-syntax make-structure
(syntax-rules ()
((make-structure ?package ?interface ?name)
(vector '<structure> ?name ?package))
((make-structure ?package ?interface)
(make-structure ?package ?interface #f))))
(define (structure-name s) (vector-ref s 1))
(define (structure-package s) (vector-ref s 2))
(define (verify-later! thunk) 'lose)
;(define *all-files* '())
; Packages are not what they appear to be.
(define (make-a-package opens-thunk accesses-thunk tower
file-name clauses name)
(vector '<a-package>
(delay (opens-thunk))
(delay (accesses-thunk))
file-name
clauses
#f))
(define (package-opens p) (force (vector-ref p 1)))
(define (package-accesses p) (force (vector-ref p 2)))
(define (package-file-name p) (vector-ref p 3))
(define (package-clauses p) (vector-ref p 4))
(define (package-loaded? p) (vector-ref p 5))
(define (set-package-loaded?! p ?) (vector-set! p 5 ?))
(define dummy-package
(make-a-package (lambda () '()) (lambda () '()) #f "" '() #f))
; source-file-names ?
(define module-system (make-structure dummy-package #f 'module-system))
(define scheme (make-structure dummy-package #f 'scheme))
(define built-in-structures
(make-structure dummy-package #f 'built-in-structures))
(define (note-name! thing name)
thing)
; Handy
(define (setdiff l1 l2)
(cond ((null? l2) l1)
((null? l1) l1)
((member (car l1) l2)
(setdiff (cdr l1) l2))
(else (cons (car l1)
(setdiff (cdr l1) l2)))))
; Stuff copied from rts/filename.scm... ugh...
; Namelist = ((dir ...) basename type)
; or ((dir ...) basename)
; or (dir basename type)
; or (dir basename)
; or basename
(define (namestring namelist dir default-type)
(let ((namelist (if (list? namelist) namelist (list '() namelist))))
(let ((subdirs (if (list? (car namelist))
(car namelist)
(list (car namelist))))
(basename (cadr namelist))
(type (if (null? (cddr namelist))
default-type
(caddr namelist))))
(string-append (or dir "")
(apply string-append
(map (lambda (subdir)
(string-append
(namestring-component subdir)
directory-component-separator))
subdirs))
(namestring-component basename)
(if type
(string-append type-component-separator
(namestring-component type))
"")))))
(define directory-component-separator "/") ;unix sux
(define type-component-separator ".")
(define (namestring-component x)
(cond ((string? x) x)
((symbol? x)
(list->string (map file-name-preferred-case
(string->list (symbol->string x)))))
(else
;; (error "bogus namelist component" x)
"bogus namelist component")))
(define file-name-preferred-case char-downcase)
(define *scheme-file-type* 'scm)
(define *load-file-type* *scheme-file-type*) ;#F for Pseudoscheme or T
(define (file-name-directory filename)
(substring filename 0 (file-nondirectory-position filename)))
(define (file-name-nondirectory filename)
(substring filename
(file-nondirectory-position filename)
(string-length filename)))
(define (file-nondirectory-position filename)
(let loop ((i (- (string-length filename) 1)))
(cond ((< i 0) 0)
;; Heuristic. Should work for DOS, Unix, VMS, MacOS.
((string-posq (string-ref filename i) "/:>]\\") (+ i 1))
(else (loop (- i 1))))))
(define (string-posq thing s)
(let loop ((i 0))
(cond ((>= i (string-length s)) #f)
((eq? thing (string-ref s i)) i)
(else (loop (+ i 1))))))
; Types
(define :value ':value)
(define :syntax ':syntax)
(define :structure ':structure)
(define :procedure ':procedure)
(define :number ':number)
(define-reflective-tower-maker list)