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-rw-r--r--Template.scm146
1 files changed, 87 insertions, 59 deletions
diff --git a/Template.scm b/Template.scm
index 6421d92..63c10c9 100644
--- a/Template.scm
+++ b/Template.scm
@@ -3,40 +3,34 @@
;;;
;;; This code is in the public domain.
-;;; (software-type) should be set to the generic operating system type.
+;;@ (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
+;;@ (scheme-implementation-type) should return the name of the scheme
;;; implementation loading this file.
-
(define (scheme-implementation-type) 'Template)
-;;; (scheme-implementation-home-page) should return a (string) URI
+;;@ (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)
-;;; (scheme-implementation-version) should return a string describing
+;;@ (scheme-implementation-version) should return a string describing
;;; the version the scheme implementation loading this file.
-
(define (scheme-implementation-version) "?")
-;;; (implementation-vicinity) should be defined to be the pathname of
+;;@ (implementation-vicinity) should be defined to be the pathname of
;;; the directory where any auxillary files to your Scheme
;;; implementation reside.
-
(define (implementation-vicinity)
(case (software-type)
((UNIX) "/usr/local/src/scheme/")
((VMS) "scheme$src:")
((MS-DOS) "C:\\scheme\\")))
-;;; (library-vicinity) should be defined to be the pathname of the
+;;@ (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
@@ -51,17 +45,21 @@
(else "")))))
(lambda () library-path)))
-;;; (home-vicinity) should return the vicinity of the user's HOME
+;;@ (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)))
-
-;;; *FEATURES* should be set to a list of symbols describing features
+(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
@@ -71,7 +69,7 @@
;; Scheme report features
- rev5-report ;conforms to
+ r5rs ;conforms to
eval ;R5RS two-argument eval
values ;R5RS multiple values
dynamic-wind ;R5RS dynamic-wind
@@ -85,11 +83,11 @@
;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!,
@@ -100,7 +98,7 @@
; 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
@@ -133,66 +131,66 @@
))
-;;; (OUTPUT-PORT-WIDTH <port>)
+;;@ (OUTPUT-PORT-WIDTH <port>)
(define (output-port-width . arg) 79)
-;;; (OUTPUT-PORT-HEIGHT <port>)
+;;@ (OUTPUT-PORT-HEIGHT <port>)
(define (output-port-height . arg) 24)
-;;; (CURRENT-ERROR-PORT)
+;;@ (CURRENT-ERROR-PORT)
(define current-error-port
(let ((port (current-output-port)))
(lambda () port)))
-;;; (TMPNAM) makes a temporary file name.
+;;@ (TMPNAM) makes a temporary file name.
(define tmpnam (let ((cntr 100))
(lambda () (set! cntr (+ 1 cntr))
(string-append "slib_" (number->string cntr)))))
-;;; (FILE-EXISTS? <string>)
+;;@ (FILE-EXISTS? <string>)
(define (file-exists? f) #f)
-;;; (DELETE-FILE <string>)
+;;@ (DELETE-FILE <string>)
(define (delete-file f) #f)
-;;; FORCE-OUTPUT flushes any pending output on optional arg output port
+;;@ FORCE-OUTPUT flushes any pending output on optional arg output port
;;; use this definition if your system doesn't have such a procedure.
(define (force-output . arg) #t)
;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
;;; port versions of CALL-WITH-*PUT-FILE.
-;;; "rationalize" adjunct procedures.
+;;@ "rationalize" adjunct procedures.
;;(define (find-ratio x e)
;; (let ((rat (rationalize x e)))
;; (list (numerator rat) (denominator rat))))
;;(define (find-ratio-between x y)
;; (find-ratio (/ (+ x y) 2) (/ (- x y) 2)))
-;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
+;;@ CHAR-CODE-LIMIT is one greater than the largest integer which can
;;; be returned by CHAR->INTEGER.
(define char-code-limit 256)
-;;; MOST-POSITIVE-FIXNUM is used in modular.scm
+;;@ MOST-POSITIVE-FIXNUM is used in modular.scm
(define most-positive-fixnum #x0FFFFFFF)
-;;; Return argument
+;;@ Return argument
(define (identity x) x)
-;;; SLIB:EVAL is single argument eval using the top-level (user) environment.
+;;@ SLIB:EVAL is single argument eval using the top-level (user) environment.
(define slib:eval eval)
-;;; If your implementation provides R4RS macros:
+;; If your implementation provides R4RS macros:
;(define macro:eval slib:eval)
;(define macro:load load)
-
(define *defmacros*
(list (cons 'defmacro
(lambda (name parms . body)
`(set! *defmacros* (cons (cons ',name (lambda ,parms ,@body))
*defmacros*))))))
+;@
(define (defmacro? m) (and (assq m *defmacros*) #t))
-
+;@
(define (macroexpand-1 e)
(if (pair? e)
(let ((a (car e)))
@@ -200,7 +198,7 @@
(if a (apply (cdr a) (cdr e)) e))
(else e)))
e))
-
+;@
(define (macroexpand e)
(if (pair? e)
(let ((a (car e)))
@@ -209,7 +207,7 @@
(if a (macroexpand (apply (cdr a) (cdr e))) e))
(else e)))
e))
-
+;@
(define gentemp
(let ((*gensym-counter* -1))
(lambda ()
@@ -218,13 +216,15 @@
(string-append "slib:G" (number->string *gensym-counter*))))))
(define base:eval slib:eval)
+;@
(define (defmacro:eval x) (base:eval (defmacro:expand* x)))
+
(define (defmacro:expand* x)
(require 'defmacroexpand) (apply defmacro:expand* x '()))
-
+;@
(define (defmacro:load <pathname>)
(slib:eval-load <pathname> defmacro:eval))
-
+;@
(define (slib:eval-load <pathname> evl)
(if (not (file-exists? <pathname>))
(set! <pathname> (string-append <pathname> (scheme-file-suffix))))
@@ -236,61 +236,89 @@
((eof-object? o))
(evl o))
(set! *load-pathname* old-load-pathname)))))
-
+;@
(define slib:warn
(lambda args
(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 an error procedure for the library
(define (slib:error . args)
(if (provided? 'trace) (print-call-stack (current-error-port)))
(apply error args))
-
-;;; define these as appropriate for your system.
+;@
+(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 '" "'")))
+
+;;@ define these as appropriate for your system.
(define slib:tab (integer->char 9))
(define slib:form-feed (integer->char 12))
-;;; Support for older versions of Scheme. Not enough code for its own file.
+;;@ Support for older versions of Scheme. Not enough code for its own file.
(define (last-pair l) (if (pair? (cdr l)) (last-pair (cdr l)) l))
(define t #t)
(define nil #f)
-;;; Define these if your implementation's syntax can support it and if
+;;@ Define these if your implementation's syntax can support it and if
;;; they are not already defined.
-
;(define (1+ n) (+ n 1))
;(define (-1+ n) (+ n -1))
;(define 1- -1+)
+;@
(define in-vicinity string-append)
-;;; Define SLIB:EXIT to be the implementation procedure to exit or
+;;@ Define SLIB:EXIT to be the implementation procedure to exit or
;;; return if exitting not supported.
(define slib:exit (lambda args #f))
-;;; Here for backward compatability
+;;@ Here for backward compatability
(define scheme-file-suffix
(let ((suffix (case (software-type)
((NOSVE) "_scm")
(else ".scm"))))
(lambda () suffix)))
-;;; (SLIB:LOAD-SOURCE "foo") should load "foo.scm" or with whatever
+;;@ (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
+;;@ (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.
-
+;;@ 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"))