diff options
Diffstat (limited to 'scheme48.init')
| -rw-r--r-- | scheme48.init | 85 |
1 files changed, 65 insertions, 20 deletions
diff --git a/scheme48.init b/scheme48.init index 75ab0f5..0640120 100644 --- a/scheme48.init +++ b/scheme48.init @@ -38,23 +38,19 @@ ;;; (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) 'Scheme48) ;;; (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) "http://s48.org/") ;;; (scheme-implementation-version) should return a string describing ;;; the version of the scheme implementation loading this file. - (define scheme-implementation-version (let ((version (getenv "S48_VERSION"))) (lambda () version))) @@ -62,14 +58,12 @@ ;;; (implementation-vicinity) should be defined to be the pathname of ;;; the directory where any auxiliary files to your Scheme ;;; implementation reside. - (define implementation-vicinity (let ((vic (getenv "S48_VICINITY"))) (lambda () vic))) ;;; (library-vicinity) should be defined to be the pathname of the ;;; directory where files of Scheme library functions reside. - (define library-vicinity (let ((vic (getenv "SCHEME_LIBRARY_PATH"))) (lambda () vic))) @@ -77,10 +71,15 @@ ;;; (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))))) (let* ((siv (scheme-implementation-version)) (num-ver (and siv (string->number siv)))) @@ -91,7 +90,6 @@ ;;; *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 @@ -101,7 +99,7 @@ ;; Scheme report features - rev5-report ;conforms to + r5rs ;conforms to eval ;R5RS two-argument eval values ;R5RS multiple values dynamic-wind ;R5RS dynamic-wind @@ -115,11 +113,11 @@ ;STRING-FILL!, LIST->VECTOR, ;VECTOR->LIST, and VECTOR-FILL! - rev4-report ;conforms to + r4rs ;conforms to ieee-p1178 ;conforms to -; rev3-report ;conforms to +; r3rs ;conforms to ; rev2-procedures ;SUBSTRING-MOVE-LEFT!, ;SUBSTRING-MOVE-RIGHT!, @@ -130,7 +128,7 @@ ; 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 @@ -200,6 +198,37 @@ (s48-force-output (if (null? arg) (current-output-port) (car arg)))) +(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) (eqv? 0 (system (sprintf #f cmd url)))) + (or (try "netscape-remote -remote 'openURL(%s)'") + (try "netscape -remote 'openURL(%s)'") + (try "netscape '%s'&") + (try "netscape '%s'"))) + ;;; "rationalize" adjunct procedures. (define (find-ratio x e) (let ((rat (rationalize x e))) @@ -227,12 +256,24 @@ (define two-arg:atan atan) (define (atan y . x) (if (null? x) (two-arg:atan y 1) (two-arg:atan y (car x)))) +;;; asin is totally busted +(define (asin y) (two-arg:atan y (sqrt (- 1 (* y y))))) + +;;; Workaround inexact->exact and exact->inexact bugs. +(define inexact->exact + (let ((i->e inexact->exact)) + (lambda (z) + (if (exact? z) z (i->e z))))) +(define exact->inexact + (let ((e->i exact->inexact)) + (lambda (z) + (if (inexact? z) z (e->i z))))) ;;; MOST-POSITIVE-FIXNUM is used in modular.scm (define most-positive-fixnum #x1FFFFFFF) ;;; Return argument -(define (identity x) x) +(define identity values) ;;; SLIB:EVAL is single argument eval using the top-level (user) environment. (define slib:eval @@ -301,7 +342,13 @@ (let ((cep (current-error-port))) (if (provided? 'trace) (print-call-stack cep)) (display "Warn: " cep) - (for-each (lambda (x) (display x cep)) args)))) + (write (car args) cep) + (newline cep) + (for-each (lambda (x) + (display " " cep) + (write x cep) + (newline cep)) + (cdr args))))) ;;; define an error procedure for the library (define (slib:error . args) @@ -344,11 +391,9 @@ ;;; (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) ;;; Scheme48 complains that these are not defined (even though they @@ -384,5 +429,5 @@ ,collect ,batch off -,dump slib.image "(slib 2d2)" +,dump slib.image "(slib 3a1)" ,exit |