diff options
Diffstat (limited to 'RScheme.init')
| -rw-r--r-- | RScheme.init | 50 |
1 files changed, 45 insertions, 5 deletions
diff --git a/RScheme.init b/RScheme.init index c03119c..b9a7d84 100644 --- a/RScheme.init +++ b/RScheme.init @@ -54,6 +54,19 @@ (else ""))))) (lambda () library-path))) +;;; (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 (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: @@ -66,7 +79,7 @@ ;; Scheme report features -; rev5-report ;conforms to +; r5rs ;conforms to ; eval ;R5RS two-argument eval ; values ;R5RS multiple values ; dynamic-wind ;R5RS dynamic-wind @@ -80,11 +93,11 @@ ;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!, @@ -95,7 +108,7 @@ 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 @@ -160,6 +173,33 @@ ;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string ;;; port versions of CALL-WITH-*PUT-FILE. +(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) + (slib:warn "define BROWSE-URL in macscheme.init")) + ;;; CHAR-CODE-LIMIT is one greater than the largest integer which can ;;; be returned by CHAR->INTEGER. (define char-code-limit 65536) @@ -232,7 +272,7 @@ (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 msg . args) |