File: mzscheme.init

package info (click to toggle)
slib 3b6-3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm, bullseye, sid
  • size: 5,192 kB
  • sloc: lisp: 29,798; makefile: 1,180; sh: 953
file content (431 lines) | stat: -rwxr-xr-x 13,911 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
;;;"mzscheme.init" Initialization for SLIB for mzscheme	-*-scheme-*-
;;; 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.
(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 "MZSCHEME_IMPLEMENTATION_PATH")
	     (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
  (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)
  (path->string (build-path 'same)))
;@
(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)
  (path->string
   (or (current-load-relative-directory)
       (current-directory))))
;@
(define sub-vicinity
  (lambda (vic name)
    (path->string (build-path vic name))))
;@
(define (make-vicinity <pathname>) <pathname>)
;@
(define with-load-pathname
  (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
;;;	srfi-0				;srfi-0, COND-EXPAND finds all srfi-*
;;;	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
	syntax-case			;has syntax-case 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				;plt/collects/srfi/28.ss says in core
;;;	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
	srfi-96
	vicinity
	current-time			;returns time in seconds since 1/1/1970
	))
;@
(define (program-arguments)
  (cons (symbol->string (scheme-implementation-type))
	(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)

(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))
;@
(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? obj) (output-port? obj)))
;@
(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.
(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
;;; they are not already defined.
(define 1+ add1)
(define -1+ sub1)
(define 1- -1+)

;;@ Define SLIB:EXIT to be the implementation procedure to exit or
;;; return if exiting not supported.
(define slib:exit exit)

;;@ Here for backward compatability
(define scheme-file-suffix
  (let ((suffix (case (software-type)
		  ((nosve) "_scm")
		  (else ".scm"))))
    (lambda () suffix)))

(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)
  (cond ((string? f)
	 (load (string-append (ensure-path-string f) ".zo")))
	((and (pair? f) (eq? 'lib (car f)))
	 (eval `(require ,f)))
	(slib:error 'slib:load-compiled 'bad 'argument f)))

;;@ At this point SLIB:LOAD must be able to load SLIB files.
(define slib:load slib:load-source)

;;; If your implementation provides R4RS macros:
(define macro:eval slib:eval)
(define macro:load slib:load-source)

;;; If your implementation provides syntax-case macros:
(define syncase:eval slib:eval)
(define syncase: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-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")))))