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-rw-r--r--DrScheme.init412
1 files changed, 345 insertions, 67 deletions
diff --git a/DrScheme.init b/DrScheme.init
index ca4ec17..c18ea18 100644
--- a/DrScheme.init
+++ b/DrScheme.init
@@ -1,27 +1,85 @@
;;;"DrScheme.init" Initialization for SLIB for DrScheme -*-scheme-*-
-;;; Author: Aubrey Jaffer
-;;;
;;; This code is in the public domain.
-;;; (software-type) should be set to the generic operating system type.
-;;; UNIX, VMS, MACOS, AMIGA and MS-DOS are supported.
-
-;@
+;;@ (software-type) should be set to the generic operating system type.
+;;; unix, vms, macos, amiga and ms-dos are supported.
(define (software-type)
(case (system-type)
[(unix macosx) 'unix]
[(windows) 'ms-dos]
[(macos) 'macos]
[else (system-type)]))
+
+;;@ (scheme-implementation-type) should return the name of the scheme
+;;; implementation loading this file.
+(define (scheme-implementation-type) '|MzScheme|)
+
+;;@ (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.plt-scheme.org/")
+
+;;@ (scheme-implementation-version) should return a string describing
+;;; the version the scheme implementation loading this file.
+(define scheme-implementation-version version)
+
+;;@ (implementation-vicinity) should be defined to be the pathname of
+;;; the directory where any auxillary files to your Scheme
+;;; implementation reside.
+(define implementation-vicinity
+ (let ([path
+ (or (getenv "PLTHOME")
+ (with-handlers ([void (lambda (x) #f)])
+ (let ([p (collection-path "mzlib")])
+ (let*-values ([(base name dir?) (split-path p)]
+ [(base name dir?) (split-path base)])
+ (and (path? base) (path->string base)))))
+ (case (system-type)
+ ((unix macosx) "/usr/local/lib/plt")
+ ((windows) "C:\\Program Files\\PLT")
+ ((macos) "My Disk:plt:")))])
+ (lambda () path)))
+
+;;@ (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
+ ;; Use this getenv if your implementation supports it.
+ (getenv "SCHEME_LIBRARY_PATH")
+ ;; Try an slib collection first
+ (with-handlers ([void (lambda (x) #f)])
+ (path->string (collection-path "slib")))
+ ;; look for slib in a few common places
+ (ormap (lambda (dir)
+ (and (directory-exists? dir) dir))
+ '("/usr/local/lib/slib/"
+ "/usr/share/slib"
+ ;; this is for RH/Fedora that uses umb-scheme for slib
+ ;;"/usr/share/umb-scheme/slib"
+ ))
+ (error 'slib-init
+ "can't find SCHEME_LIBRARY_PATH environment variable, \"slib\" collection, or a system slib directory"))))
+ (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)
+ (path->string (find-system-path 'home-dir)))
;@
-(define in-vicinity string-append)
+(define in-vicinity
+ (lambda args
+ (path->string
+ (let loop ([args args])
+ (cond
+ [(null? (cdr args)) (car args)]
+ [(string=? "" (car args)) (loop (cdr args))]
+ [else (let ([v (loop (cdr args))])
+ (build-path (car args) v))])))))
;@
(define (user-vicinity)
- (case (software-type)
- ((vms) "[.]")
- (else "")))
-
-(define *load-pathname* #f)
+ (path->string (build-path 'same)))
;@
(define vicinity:suffix?
(let ((suffi
@@ -43,53 +101,232 @@
((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")))
+ (path->string
+ (or (current-load-relative-directory)
+ (current-directory))))
;@
(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*))))))
+ (lambda (vic name)
+ (path->string (build-path vic name))))
;@
(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)))))))
+ (lambda (a thunk) (thunk)))
+
+;;; slib:features should be set to a list of symbols describing
+;;; features of this implementation. Suggestions for features are:
+
+(define slib:features
+ '(
+ source ;can load scheme source files
+ ;(slib:load-source "filename")
+ compiled ;can load compiled files
+ ;(slib:load-compiled "filename")
+ rev4-report ;conforms to
+;;; rev3-report ;conforms to
+;;; ieee-p1178 ;conforms to
+;;; sicp ;runs code from Structure and
+ ;Interpretation of Computer
+ ;Programs by Abelson and Sussman.
+ rev4-optional-procedures ;LIST-TAIL, STRING->LIST,
+ ;LIST->STRING, STRING-COPY,
+ ;STRING-FILL!, LIST->VECTOR,
+ ;VECTOR->LIST, and VECTOR-FILL!
+;;; rev2-procedures ;SUBSTRING-MOVE-LEFT!,
+ ;SUBSTRING-MOVE-RIGHT!,
+ ;SUBSTRING-FILL!,
+ ;STRING-NULL?, APPEND!, 1+,
+ ;-1+, <?, <=?, =?, >?, >=?
+ multiarg/and- ;/ and - can take more than 2 args.
+ multiarg-apply ;APPLY can take more than 2 args.
+ rationalize
+ delay ;has DELAY and FORCE
+ with-file ;has WITH-INPUT-FROM-FILE and
+ ;WITH-OUTPUT-FROM-FILE
+ string-port ;has CALL-WITH-INPUT-STRING and
+ ;CALL-WITH-OUTPUT-STRING
+;;; transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF
+ char-ready?
+ macro ;has R4RS high level macros
+ defmacro ;has Common Lisp DEFMACRO
+ eval ;SLIB:EVAL is single argument eval
+;;; record ;has user defined data structures
+ values ;proposed multiple values
+ dynamic-wind ;proposed dynamic-wind
+ ieee-floating-point ;conforms to
+ full-continuation ;can return multiple times
+;;; object-hash ;has OBJECT-HASH
+
+;;; sort
+;;; queue ;queues
+ pretty-print
+;;; object->string
+;;; format
+;;; trace ;has macros: TRACE and UNTRACE
+;;; compiler ;has (COMPILER)
+;;; ed ;(ED) is editor
+ system ;posix (system <string>)
+ getenv ;posix (getenv <string>)
+ program-arguments ;returns list of strings (argv)
+;;; Xwindows ;X support
+;;; curses ;screen management package
+;;; termcap ;terminal description package
+;;; terminfo ;sysV terminal description
+ fluid-let
+ srfi-59
+ vicinity
+ current-time ;returns time in seconds since 1/1/1970
+ ))
+;@
+(define program-arguments
+ (lambda ()
+ (vector->list (current-command-line-arguments))))
+
+(require (lib "pretty.ss"))
+(unless (memq (system-type) '(unix beos))
+ (namespace-require '(lib "date.ss")))
+;@
+(define current-time
+ ;; Gives time since 1/1/1970 ...
+ ;; ... GMT for Unix, Windows, and Mac OS X.
+ ;; ... local time for Mac OS.
+ (if (memq (system-type) '(unix macosx windows))
+ current-seconds
+ (let ([zero (find-seconds 0 0 0 1 1 1970)])
+ (lambda ()
+ (- (current-seconds) zero)))))
+
+;;@ (OUTPUT-PORT-WIDTH <port>)
+(define (output-port-width . arg) 79)
+
+;;@ (OUTPUT-PORT-HEIGHT <port>)
+(define (output-port-height . arg) 24)
+
+;;; (CURRENT-ERROR-PORT)
+;; Already in MzScheme
+
+;;@ (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>)
+;; Already in MzScheme
+
+;;; (DELETE-FILE <string>)
+;; Already in MzScheme
+
+;;@ 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 flush-output)
+
+;;@ CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
+;;; port versions of CALL-WITH-*PUT-FILE.
+(define call-with-input-string
+ (lambda (string thunk)
+ (parameterize ((current-input-port (open-input-string string)))
+ (thunk (current-input-port)))))
+(define call-with-output-string
+ (lambda (receiver)
+ (let ((sp (open-output-string)))
+ (receiver sp)
+ (get-output-string sp))))
+
+;;; "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
+;;; be returned by CHAR->INTEGER.
+(define char-code-limit 256)
+
+;;@ MOST-POSITIVE-FIXNUM is used in modular.scm
+(define most-positive-fixnum #x3FFFFFFF) ; 30 bits on 32-bit machines
+; (define most-positive-fixnum #x3FFFFFFFFFFFFFFF) ; 62 bits on 64-bit machines
+
+;;@ Return argument
+(define (identity x) x)
+
+;;@ SLIB:EVAL is single argument eval using the top-level (user) environment.
+(define slib:eval eval)
+
+;;; 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)))
+ (cond ((symbol? a) (set! a (assq a *defmacros*))
+ (if a (apply (cdr a) (cdr e)) e))
+ (else e)))
+ e))
+;@
+(define (macroexpand e)
+ (if (pair? e)
+ (let ((a (car e)))
+ (cond ((symbol? a)
+ (set! a (assq a *defmacros*))
+ (if a (macroexpand (apply (cdr a) (cdr e))) e))
+ (else e)))
+ e))
+;@
+(define gentemp
+ (let ((*gensym-counter* -1))
+ (lambda ()
+ (set! *gensym-counter* (+ *gensym-counter* 1))
+ (string->symbol
+ (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)
+ (slib:require 'defmacroexpand) (apply defmacro:expand* x '()))
+;@
+(define (defmacro:load <pathname>)
+ (slib:eval-load <pathname> defmacro:eval))
+;; slib:eval-load definition moved to "require.scm"
+;@
+(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 #\space cep) (write x cep)) args)
+ (newline cep))))
+
+;;@ define an error procedure for the library
+(define slib:error
+ (let ((error error))
+ (lambda args
+ (let ((cep (current-error-port)))
+ (if (provided? 'trace) (print-call-stack cep))
+ (apply error "Error:" args)))))
+;@
(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 (port? obj) (or (input-port? obj) (output-port? obj)))
+;@
(define (call-with-open-ports . ports)
(define proc (car ports))
(cond ((procedure? proc) (set! ports (cdr ports)))
@@ -99,13 +336,14 @@
(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(" ")'")
@@ -113,30 +351,70 @@
(try "netscape '" "'&")
(try "netscape '" "'")))
-(cond ((string<? (version) "200")
- (require-library "init.ss" "slibinit"))
- (else
- (load (build-path (collection-path "slibinit") "init.ss"))
- (eval '(require (lib "defmacro.ss")))
- (slib:provide 'defmacro)))
+;;@ define these as appropriate for your system.
+(define slib:tab (integer->char 9))
+(define slib:form-feed (integer->char 12))
-(provide 'vicinity)
-(provide 'srfi-59)
+;;@ 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)
-;;;The rest corrects mistakes in
-;;;/usr/local/lib/plt/collects/slibinit/init.ss:
+;;@ Define these if your implementation's syntax can support it and if
+;;; they are not already defined.
+(define 1+ add1)
+(define -1+ sub1)
+(define 1- -1+)
-(provide 'fluid-let)
+;;@ Define SLIB:EXIT to be the implementation procedure to exit or
+;;; return if exiting not supported.
+(define slib:exit exit)
-(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 #\ cep) (write x cep)) args)
- (newline cep))))
+;;@ Here for backward compatability
+(define scheme-file-suffix
+ (let ((suffix (case (software-type)
+ ((nosve) "_scm")
+ (else ".scm"))))
+ (lambda () suffix)))
-(define call-with-input-string
- (lambda (string thunk)
- (parameterize ((current-input-port (open-input-string string)))
- (thunk (current-input-port)))))
+(define (ensure-path-string p)
+ (if (path? p) (path->string p) p))
+
+;;@ (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 (ensure-path-string 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 f)
+ (load (string-append (ensure-path-string f) ".zo")))
+
+;;@ At this point SLIB:LOAD must be able to load SLIB files.
+(define slib:load slib:load-source)
+
+(require (rename mzscheme mz:require require))
+
+(slib:load (in-vicinity (library-vicinity) "require"))
+
+;;; Hack `require' to work with both SLIB and MzScheme:
+(define slib:require require)
+(define-syntax (require stx)
+ (syntax-case stx (quote)
+ [_
+ (identifier? stx)
+ #'slib:require]
+ [(_ (quote something))
+ #'(slib:require (quote something))]
+ [(_ req ...)
+ (if (eq? 'top-level (syntax-local-context))
+ #'(mz:require req ...)
+ #'(slib:require req ...))]))
+
+;;; Previously loaded "/usr/local/lib/plt/collects/slibinit/init.ss"
+(cond ((string<? (version) "200")
+ (require-library "init.ss" "slibinit"))
+ (else
+ ;; (load (build-path (collection-path "slibinit") "init.ss"))
+ (eval '(require (lib "defmacro.ss")))))