diff options
Diffstat (limited to 'scheme2c.init')
| -rw-r--r-- | scheme2c.init | 70 |
1 files changed, 48 insertions, 22 deletions
diff --git a/scheme2c.init b/scheme2c.init index f1d9fe6..a9dbab9 100644 --- a/scheme2c.init +++ b/scheme2c.init @@ -13,23 +13,20 @@ ;; Of course, if you make serious use of library functions you'll want ;; to compile them and use Scheme->C modules. - (define (software-type) 'UNIX) ;;; (scheme-implementation-type) should return the name of the scheme ;;; implementation loading this file. - (define (scheme-implementation-type) 'Scheme->C) ;;; (scheme-implementation-home-page) should return a (string) URI ;;; (Uniform Resource Identifier) for this scheme implementation's home ;;; page; or false if there isn't one. - -(define (scheme-implementation-home-page) #f) +(define (scheme-implementation-home-page) + "http://www-2.cs.cmu.edu/afs/cs/project/ai-repository/ai/lang/scheme/impl/scheme2c/0.html") ;;; (scheme-implementation-version) should return a string describing ;;; the version the scheme implementation loading this file. - (define (scheme-implementation-version) "?01nov91") (define (implementation-vicinity) @@ -40,7 +37,6 @@ ;;; (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 (case (software-type) @@ -53,15 +49,19 @@ ;;; (home-vicinity) should return the vicinity of the user's HOME ;;; directory, the directory which typically contains files which ;;; customize a computer environment for a user. - -(define home-vicinity - (let ((home-path (getenv "HOME"))) - (lambda () home-path))) +(define (home-vicinity) + (let ((home (getenv "HOME"))) + (and home + (case (software-type) + ((UNIX COHERENT MS-DOS) ;V7 unix has a / on HOME + (if (eqv? #\/ (string-ref home (+ -1 (string-length home)))) + home + (string-append home "/"))) + (else home))))) ;;; *FEATURES* should be set to a list of symbols describing features ;;; of this implementation. See Template.scm for the list of feature ;;; names. - (define *features* '( source ;can load scheme source files @@ -71,7 +71,7 @@ ;; Scheme report features -; rev5-report ;conforms to +; r5rs ;conforms to ; eval ;R5RS two-argument eval ; values ;R5RS multiple values ; dynamic-wind ;R5RS dynamic-wind @@ -85,14 +85,14 @@ ;STRING-FILL!, LIST->VECTOR, ;VECTOR->LIST, and VECTOR-FILL! - rev4-report ;conforms to + r4rs ;conforms to ;; Follows rev4 as far as I can tell, modulo '() being false, ;; number syntax (see doc), incomplete tail recursion (see ;; docs) and a couple of bugs in some versions -- see below. ; ieee-p1178 ;conforms to - rev3-report ;conforms to + r3rs ;conforms to ; rev2-procedures ;SUBSTRING-MOVE-LEFT!, ;SUBSTRING-MOVE-RIGHT!, @@ -103,7 +103,7 @@ multiarg/and- ;/ and - can take more than 2 args. with-file ;has WITH-INPUT-FROM-FILE and - ;WITH-OUTPUT-FROM-FILE + ;WITH-OUTPUT-TO-FILE transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF ieee-floating-point ;conforms to IEEE Standard 754-1985 ;IEEE Standard for Binary @@ -184,6 +184,37 @@ (close-input-port insp) res)) +(define (make-exchanger obj) + (lambda (rep) (let ((old obj)) (set! obj rep) old))) +(define (open-file filename modes) + (case modes + ((r rb) (open-input-file filename)) + ((w wb) (open-output-file filename)) + (else (slib:error 'open-file 'mode? modes)))) +(define (port? obj) (or (input-port? port) (output-port? port))) +(define (call-with-open-ports . ports) + (define proc (car ports)) + (cond ((procedure? proc) (set! ports (cdr ports))) + (else (set! ports (reverse ports)) + (set! proc (car ports)) + (set! ports (reverse (cdr ports))))) + (let ((ans (apply proc ports))) + (for-each close-port ports) + ans)) +(define (close-port port) + (cond ((input-port? port) + (close-input-port port) + (if (output-port? port) (close-output-port port))) + ((output-port? port) (close-output-port port)) + (else (slib:error 'close-port 'port? port)))) + +(define (browse-url url) + (define (try cmd end) (zero? (system (string-append cmd url end)))) + (or (try "netscape-remote -remote 'openURL(" ")'") + (try "netscape -remote 'openURL(" ")'") + (try "netscape '" "'&") + (try "netscape '" "'"))) + ;;; "rationalize" adjunct procedures. (define (find-ratio x e) (let ((rat (rationalize x e))) @@ -254,7 +285,7 @@ (let ((cep (current-error-port))) (if (provided? 'trace) (print-call-stack cep)) (display "Warn: " cep) - (for-each (lambda (x) (display x cep)) args)))) + (for-each (lambda (x) (display #\ cep) (write x cep)) args)))) ;; define an error procedure for the library (define (slib:error . args) @@ -271,7 +302,6 @@ (define slib:form-feed (integer->char 12)) ;;; bug fixes for Scheme->C (versions 28sep90, 23feb90, 01nov91): - (let ((vers (substring (cadr (implementation-information)) 0 7))) (if (or (string=? vers "28sep90") (string=? vers "23feb90") (string=? vers "01nov91")) @@ -299,12 +329,11 @@ ;; DEFINE as shown by test.scm -- not fixed here. ))) -(define promise:force force) +;;(define force force) ;;; (implementation-vicinity) should be defined to be the pathname of ;;; the directory where any auxillary files to your Scheme ;;; implementation reside. - (define in-vicinity string-append) ;;; Define SLIB:EXIT to be the implementation procedure to exit or @@ -320,17 +349,14 @@ ;;; (SLIB:LOAD-SOURCE "foo") should load "foo.scm" or with whatever ;;; suffix all the module files in SLIB have. See feature 'SOURCE. - (define (slib:load-source f) (load (string-append f (scheme-file-suffix)))) ;;; (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")) |