diff options
Diffstat (limited to 'mitscheme.init')
| -rw-r--r-- | mitscheme.init | 150 |
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)) |