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-rw-r--r--mitscheme.init150
1 files changed, 107 insertions, 43 deletions
diff --git a/mitscheme.init b/mitscheme.init
index 934de62..9768155 100644
--- a/mitscheme.init
+++ b/mitscheme.init
@@ -19,7 +19,7 @@
;;; (Uniform Resource Identifier) for this scheme implementation's home
;;; page; or false if there isn't one.
(define (scheme-implementation-home-page)
- "http://www.swiss.ai.mit.edu/projects/scheme/")
+ "http://swiss.csail.mit.edu/projects/scheme/")
;;; (scheme-implementation-version) should return a string describing
;;; the version the scheme implementation loading this file.
@@ -66,42 +66,116 @@
;;; customize a computer environment for a user.
(define (home-vicinity)
(->namestring (user-homedir-pathname)))
-
-;;; *features* should be set to a list of symbols describing features
-;;; of this implementation. See Template.scm for the list of feature
-;;; names.
+;@
+(define (in-vicinity vicinity file-name)
+ (->namestring (merge-pathnames file-name vicinity)))
+;@
+(define (user-vicinity)
+ (case (software-type)
+ ((VMS) "[.]")
+ (else "")))
+
+(define *load-pathname* #f)
+;@
+(define vicinity:suffix?
+ (let ((suffi
+ (case (software-type)
+ ((AMIGA) '(#\: #\/))
+ ((MACOS THINKC) '(#\:))
+ ((MS-DOS WINDOWS ATARIST OS/2) '(#\\ #\/))
+ ((NOSVE) '(#\: #\.))
+ ((UNIX COHERENT PLAN9) '(#\/))
+ ((VMS) '(#\: #\]))
+ (else
+ (slib:warn "require.scm" 'unknown 'software-type (software-type))
+ "/"))))
+ (lambda (chr) (and (memv chr suffi) #t))))
+;@
+(define (pathname->vicinity pathname)
+ (let loop ((i (- (string-length pathname) 1)))
+ (cond ((negative? i) "")
+ ((vicinity:suffix? (string-ref pathname i))
+ (substring pathname 0 (+ i 1)))
+ (else (loop (- i 1))))))
+(define (program-vicinity)
+ (if *load-pathname*
+ (pathname->vicinity *load-pathname*)
+ (slib:error 'program-vicinity " called; use slib:load to load")))
+;@
+(define sub-vicinity
+ (case (software-type)
+ ((VMS) (lambda
+ (vic name)
+ (let ((l (string-length vic)))
+ (if (or (zero? (string-length vic))
+ (not (char=? #\] (string-ref vic (- l 1)))))
+ (string-append vic "[" name "]")
+ (string-append (substring vic 0 (- l 1))
+ "." name "]")))))
+ (else (let ((*vicinity-suffix*
+ (case (software-type)
+ ((NOSVE) ".")
+ ((MACOS THINKC) ":")
+ ((MS-DOS WINDOWS ATARIST OS/2) "\\")
+ ((UNIX COHERENT PLAN9 AMIGA) "/"))))
+ (lambda (vic name)
+ (string-append vic name *vicinity-suffix*))))))
+;@
+(define (make-vicinity <pathname>) <pathname>)
+;@
+(define with-load-pathname
+ (let ((exchange
+ (lambda (new)
+ (let ((old *load-pathname*))
+ (set! *load-pathname* new)
+ old))))
+ (lambda (path thunk)
+ (let ((old #f))
+ (dynamic-wind
+ (lambda () (set! old (exchange path)))
+ thunk
+ (lambda () (exchange old)))))))
+
+;;@ *FEATURES* is a list of symbols naming the (SLIB) features
+;;; initially supported by this implementation.
(define *features*
'(
source ;can load scheme source files
- ;(slib:load-source "filename")
+ ;(SLIB:LOAD-SOURCE "filename")
compiled ;can load compiled files
- ;(slib:load-compiled "filename")
+ ;(SLIB:LOAD-COMPILED "filename")
+ vicinity
+ srfi-59
;; Scheme report features
; **** no, for several reasons
-; r5rs ;conforms to
+;;; r5rs ;conforms to
; **** no -- special arguments not supported
-; eval ;R5RS two-argument eval
+;;; eval ;R5RS two-argument eval
; **** sort of -- not integrated with continuations
values ;R5RS multiple values
dynamic-wind ;R5RS dynamic-wind
- fluid-let
+;;; macro ;R5RS high level macros
delay ;has DELAY and FORCE
multiarg-apply ;APPLY can take more than 2 args.
char-ready?
+ rev4-optional-procedures ;LIST-TAIL, STRING-COPY,
+ ;STRING-FILL!, and VECTOR-FILL!
+
+ ;; These four features are optional in both R4RS and R5RS
+
+ multiarg/and- ;/ and - can take more than 2 args.
rationalize
- rev4-optional-procedures ;LIST-TAIL, STRING->LIST,
- ;LIST->STRING, STRING-COPY,
- ;STRING-FILL!, LIST->VECTOR,
- ;VECTOR->LIST, and VECTOR-FILL!
+ transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF
+ with-file ;has WITH-INPUT-FROM-FILE and
+ ;WITH-OUTPUT-TO-FILE
r4rs ;conforms to
-
; **** no -- #F and '() are identical
-; ieee-p1178 ;conforms to
+;;; ieee-p1178 ;conforms to
-; r3rs ;conforms to
+;;; r3rs ;conforms to
rev2-procedures ;SUBSTRING-MOVE-LEFT!,
;SUBSTRING-MOVE-RIGHT!,
@@ -110,18 +184,17 @@
;-1+, <?, <=?, =?, >?, >=?
object-hash ;has OBJECT-HASH
- multiarg/and- ;/ and - can take more than 2 args.
- with-file ;has WITH-INPUT-FROM-FILE and
- ;WITH-OUTPUT-TO-FILE
- transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF
+ full-continuation ;can return multiple times
ieee-floating-point ;conforms to IEEE Standard 754-1985
;IEEE Standard for Binary
;Floating-Point Arithmetic.
- full-continuation ;can return multiple times
;; Other common features
-; srfi ;srfi-0, COND-EXPAND finds all srfi-*
+;;; srfi ;srfi-0, COND-EXPAND finds all srfi-*
+;;; sicp ;runs code from Structure and
+ ;Interpretation of Computer
+ ;Programs by Abelson and Sussman.
defmacro ;has Common Lisp DEFMACRO
record ;has user defined data structures
string-port ;has CALL-WITH-INPUT-STRING and
@@ -130,17 +203,18 @@
pretty-print
object->string
; **** limited subset with (load-option 'format)
-; format ;Common-lisp output formatting
+;;; format ;Common-lisp output formatting
trace ;has macros: TRACE and UNTRACE
compiler ;has (COMPILER)
-; ed ;(ED) is editor
+;;; ed ;(ED) is editor
system ;posix (system <string>)
getenv ;posix (getenv <string>)
-; program-arguments ;returns list of strings (argv)
+;;; program-arguments ;returns list of strings (argv)
current-time ;returns time in seconds since 1/1/1970
;; Implementation Specific features
+ fluid-let
queue
Xwindows
))
@@ -328,17 +402,7 @@
(begin
(environment-define (the-environment) 'macro:eval slib:eval)
(environment-define (the-environment) 'macro:load load)))
-
-(define (slib:eval-load <pathname> evl)
- (if (not (file-exists? <pathname>))
- (set! <pathname> (string-append <pathname> (scheme-file-suffix))))
- (call-with-input-file <pathname>
- (lambda (port)
- (let ((old-load-pathname *load-pathname*))
- (fluid-let ((*load-pathname* <pathname>))
- (do ((o (read port) (read port)))
- ((eof-object? o))
- (evl o)))))))
+;; slib:eval-load definition moved to "require.scm"
;; Older implementations need this definition.
(if (lexical-unreferenceable? (the-environment) 'record-modifier)
@@ -349,19 +413,19 @@
(apply warn args))
;; define an error procedure for the library
-(define (slib:error . args)
+(define (slib:error first . args)
(if (provided? 'trace) (print-call-stack (current-error-port)))
- (apply error args))
+ (case first
+ ((wrong-type-argument) (apply error:wrong-type-argument args))
+ ((bad-range-argument) (apply error:bad-range-argument args))
+ (else (apply error first args))))
;; define these as appropriate for your system.
(define slib:tab (name->char "tab"))
(define slib:form-feed (name->char "page"))
-(define (in-vicinity vicinity file-name)
- (->namestring (merge-pathnames file-name vicinity)))
-
;;; Define SLIB:EXIT to be the implementation procedure to exit or
-;;; return if exitting not supported.
+;;; return if exiting not supported.
(define slib:exit
(lambda args
(cond ((null? args) (exit))