diff options
Diffstat (limited to 'chez.init')
| -rw-r--r-- | chez.init | 75 |
1 files changed, 48 insertions, 27 deletions
@@ -8,36 +8,30 @@ ;;; (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) 'chez) ;;; (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://www.cs.indiana.edu/chezscheme/") + "http://www.scheme.com/") ;;; (scheme-implementation-version) should return a string describing ;;; the version the scheme implementation loading this file. - (define (scheme-implementation-version) "6.0a") ;;; (implementation-vicinity) should be defined to be the pathname of ;;; the directory where any auxillary files to your Scheme ;;; implementation reside. - (define implementation-vicinity (lambda () "/usr/unsup/scheme/chez/")) ;;; (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 @@ -55,14 +49,18 @@ ;;; (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. Suggestions for features are: - (define *features* '( source ;can load scheme source files @@ -72,7 +70,7 @@ ;; Scheme report features - rev5-report ;conforms to + r5rs ;conforms to eval ;R5RS two-argument eval values ;R5RS multiple values dynamic-wind ;R5RS dynamic-wind @@ -86,11 +84,11 @@ ;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!, @@ -101,7 +99,7 @@ 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 @@ -132,13 +130,12 @@ ;; Implementation Specific features +;;; random ;Not the same as SLIB random fluid-let - random )) ;;; (OUTPUT-PORT-WIDTH <port>) returns the number of graphic characters ;;; that can reliably be displayed on one line of the standard output port. - (define output-port-width (lambda arg (let ((env-width-string (getenv "COLUMNS"))) @@ -154,7 +151,6 @@ ;;; (OUTPUT-PORT-HEIGHT <port>) returns the number of lines of text that ;;; can reliably be displayed simultaneously in the standard output port. - (define output-port-height (lambda arg (let ((env-height-string (getenv "LINES"))) @@ -189,6 +185,37 @@ ;; port to be transferred all the way out to its ultimate destination. (define force-output flush-output-port) +(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))) @@ -218,7 +245,7 @@ (let ((cep (current-error-port))) (if (provided? 'trace) (print-call-stack cep)) (display "Error: " cep) - (for-each (lambda (x) (display x cep)) args) + (for-each (lambda (x) (display #\ cep) (write x cep)) args) (error #f "")))) ;;; define these as appropriate for your system. @@ -269,17 +296,14 @@ ;;; (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 ".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) ;;; The following make procedures in Chez Scheme compatible with @@ -309,7 +333,6 @@ ;;; Chez's (FORMAT F . A) corresponds to SLIB's (FORMAT #F F . A) ;;; See the FORMAT feature. - (define chez:format format) (define format @@ -325,7 +348,6 @@ ;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string ;;; port versions of CALL-WITH-INPUT-FILE and CALL-WITH-OUTPUT-FILE. ;;; See the STRING-PORT feature. - (define call-with-output-string (lambda (f) (let ((outsp (open-output-string))) @@ -397,10 +419,9 @@ (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)))) ;;; Load the REQUIRE package. - (slib:load (in-vicinity (library-vicinity) "require")) ;; end of chez.init |