module/slib/macscheme.init

   1 ;;;"macscheme.init" Configuration of *features* for MacScheme   -*-scheme-*-
   2 ;;; Author: Aubrey Jaffer
   3 ;;;
   4 ;;; This code is in the public domain.
   5
   6 ;;; From: jjb@isye.gatech.edu (John Bartholdi)
   7
   8 ;;; (software-type) should be set to the generic operating system type.
   9 ;;; UNIX, VMS, MACOS, AMIGA and MS-DOS are supported.
  10
  11 (define (software-type) 'MACOS)
  12
  13 ;;; (scheme-implementation-type) should return the name of the scheme
  14 ;;; implementation loading this file.
  15
  16 (define (scheme-implementation-type) 'MacScheme)
  17
  18 ;;; (scheme-implementation-home-page) should return a (string) URI
  19 ;;; (Uniform Resource Identifier) for this scheme implementation's home
  20 ;;; page; or false if there isn't one.
  21
  22 (define (scheme-implementation-home-page) #f)
  23
  24 ;;; (scheme-implementation-version) should return a string describing
  25 ;;; the version the scheme implementation loading this file.
  26
  27 (define (scheme-implementation-version) "4.2")
  28
  29 ;;; (implementation-vicinity) should be defined to be the pathname of
  30 ;;; the directory where any auxillary files to your Scheme
  31 ;;; implementation reside.
  32
  33 (define (implementation-vicinity) "Macintosh.HD:MacScheme 4.2:")
  34
  35 ;;; (library-vicinity) should be defined to be the pathname of the
  36 ;;; directory where files of Scheme library functions reside.
  37
  38 (define (library-vicinity) "Macintosh.HD:MacScheme 4.2:slib:")
  39
  40 ;;; (home-vicinity) should return the vicinity of the user's HOME
  41 ;;; directory, the directory which typically contains files which
  42 ;;; customize a computer environment for a user.
  43
  44 (define (home-vicinity) #f)
  45
  46 ;;; *FEATURES* should be set to a list of symbols describing features
  47 ;;; of this implementation.  Suggestions for features are:
  48
  49 (define *features*
  50       '(
  51         source                          ;can load scheme source files
  52                                         ;(slib:load-source "filename")
  53 ;       compiled                        ;can load compiled files
  54                                         ;(slib:load-compiled "filename")
  55         rev4-report                     ;conforms to
  56         rev3-report                     ;conforms to
  57         ieee-p1178                      ;conforms to
  58 ;       sicp                            ;runs code from Structure and
  59                                         ;Interpretation of Computer
  60                                         ;Programs by Abelson and Sussman.
  61         rev4-optional-procedures        ;LIST-TAIL, STRING->LIST,
  62                                         ;LIST->STRING, STRING-COPY,
  63                                         ;STRING-FILL!, LIST->VECTOR,
  64                                         ;VECTOR->LIST, and VECTOR-FILL!
  65         rev3-procedures                 ;LAST-PAIR, T, and NIL
  66 ;       rev2-procedures                 ;SUBSTRING-MOVE-LEFT!,
  67                                         ;SUBSTRING-MOVE-RIGHT!,
  68                                         ;SUBSTRING-FILL!,
  69                                         ;STRING-NULL?, APPEND!, 1+,
  70                                         ;-1+, <?, <=?, =?, >?, >=?
  71         multiarg/and-                   ;/ and - can take more than 2 args.
  72         multiarg-apply                  ;APPLY can take more than 2 args.
  73         rationalize
  74         delay                           ;has DELAY and FORCE
  75         with-file                       ;has WITH-INPUT-FROM-FILE and
  76                                         ;WITH-OUTPUT-FROM-FILE
  77         string-port                     ;has CALL-WITH-INPUT-STRING and
  78                                         ;CALL-WITH-OUTPUT-STRING
  79 ;       transcript                      ;TRANSCRIPT-ON and TRANSCRIPT-OFF
  80 ;       char-ready?
  81 ;       macro                           ;has R4RS high level macros
  82 ;       defmacro                        ;has Common Lisp DEFMACRO
  83 ;       record                          ;has user defined data structures
  84 ;       values                          ;proposed multiple values
  85 ;       dynamic-wind                    ;proposed dynamic-wind
  86         ieee-floating-point             ;conforms to
  87         full-continuation               ;can return multiple times
  88 ;       object-hash                     ;has OBJECT-HASH
  89
  90 ;       sort
  91 ;       queue                           ;queues
  92         pretty-print
  93 ;       object->string
  94 ;       format
  95 ;       trace                           ;has macros: TRACE and UNTRACE
  96         compiler                        ;has (COMPILER)
  97 ;       ed                              ;(ED) is editor
  98 ;       system                          ;posix (system <string>)
  99 ;       getenv                          ;posix (getenv <string>)
 100 ;       program-arguments               ;returns list of strings (argv)
 101 ;       Xwindows                        ;X support
 102 ;       curses                          ;screen management package
 103 ;       termcap                         ;terminal description package
 104 ;       terminfo                        ;sysV terminal description
 105         ))
 106
 107 ;;; (OUTPUT-PORT-WIDTH <port>)
 108 (define (output-port-width . arg) 79)
 109
 110 ;;; (OUTPUT-PORT-HEIGHT <port>)
 111 (define (output-port-height . arg) 24)
 112
 113 ;;; (CURRENT-ERROR-PORT)
 114 (define current-error-port
 115   (let ((port (current-output-port)))
 116     (lambda () port)))
 117
 118 ;;; (TMPNAM) makes a temporary file name.
 119 (define tmpnam (let ((cntr 100))
 120                  (lambda () (set! cntr (+ 1 cntr))
 121                          (string-append "slib_" (number->string cntr)))))
 122
 123 ;;; (FILE-EXISTS? <string>)
 124 (define (file-exists? f) #f)
 125
 126 ;;; (DELETE-FILE <string>)
 127 (define (delete-file f) #f)
 128
 129 ;;; FORCE-OUTPUT flushes any pending output on optional arg output port
 130 ;;; use this definition if your system doesn't have such a procedure.
 131 (define (force-output . arg) #t)
 132
 133 ;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
 134 ;;; port versions of CALL-WITH-*PUT-FILE.
 135 (define (call-with-output-string f)
 136   (let ((outsp (open-output-string)))
 137     (f outsp)
 138     (let ((s (get-output-string outsp)))
 139       (close-output-port outsp)
 140       s)))
 141
 142 (define (call-with-input-string s f)
 143   (let* ((insp (open-input-string s))
 144          (res (f insp)))
 145     (close-input-port insp)
 146     res))
 147
 148 ;;; "rationalize" adjunct procedures.
 149 (define (find-ratio x e)
 150   (let ((rat (rationalize x e)))
 151     (list (numerator rat) (denominator rat))))
 152 (define (find-ratio-between x y)
 153   (find-ratio (/ (+ x y) 2) (/ (- x y) 2)))
 154
 155 ;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
 156 ;;; be returned by CHAR->INTEGER.
 157 (define char-code-limit 256)
 158
 159 ;;; MOST-POSITIVE-FIXNUM is used in modular.scm
 160 (define most-positive-fixnum 536870911)
 161
 162 ;;; Return argument
 163 (define (identity x) x)
 164
 165 ;;; SLIB:EVAL is single argument eval using the top-level (user) environment.
 166 (define slib:eval eval)
 167
 168 ;;; If your implementation provides R4RS macros:
 169 ;(define macro:eval slib:eval)
 170 ;(define macro:load load)
 171
 172 (define *defmacros*
 173   (list (cons 'defmacro
 174               (lambda (name parms . body)
 175                 `(set! *defmacros* (cons (cons ',name (lambda ,parms ,@body))
 176                                       *defmacros*))))))
 177 (define (defmacro? m) (and (assq m *defmacros*) #t))
 178
 179 (define (macroexpand-1 e)
 180   (if (pair? e) (let ((a (car e)))
 181                   (cond ((symbol? a) (set! a (assq a *defmacros*))
 182                                      (if a (apply (cdr a) (cdr e)) e))
 183                         (else e)))
 184       e))
 185
 186 (define (macroexpand e)
 187   (if (pair? e) (let ((a (car e)))
 188                   (cond ((symbol? a)
 189                          (set! a (assq a *defmacros*))
 190                          (if a (macroexpand (apply (cdr a) (cdr e))) e))
 191                         (else e)))
 192       e))
 193
 194 (define gentemp
 195   (let ((*gensym-counter* -1))
 196     (lambda ()
 197       (set! *gensym-counter* (+ *gensym-counter* 1))
 198       (string->symbol
 199        (string-append "slib:G" (number->string *gensym-counter*))))))
 200
 201 (define base:eval slib:eval)
 202 (define (defmacro:eval x) (base:eval (defmacro:expand* x)))
 203 (define (defmacro:expand* x)
 204   (require 'defmacroexpand) (apply defmacro:expand* x '()))
 205
 206 (define (defmacro:load <pathname>)
 207   (slib:eval-load <pathname> defmacro:eval))
 208
 209 (define (slib:eval-load <pathname> evl)
 210   (if (not (file-exists? <pathname>))
 211       (set! <pathname> (string-append <pathname> (scheme-file-suffix))))
 212   (call-with-input-file <pathname>
 213     (lambda (port)
 214       (let ((old-load-pathname *load-pathname*))
 215         (set! *load-pathname* <pathname>)
 216         (do ((o (read port) (read port)))
 217             ((eof-object? o))
 218           (evl o))
 219         (set! *load-pathname* old-load-pathname)))))
 220
 221 (define slib:warn
 222   (lambda args
 223     (let ((cep (current-error-port)))
 224       (if (provided? 'trace) (print-call-stack cep))
 225       (display "Warn: " cep)
 226       (for-each (lambda (x) (display x cep)) args))))
 227
 228 ;;; define an error procedure for the library
 229 (define slib:error
 230   (lambda args
 231     (if (provided? 'trace) (print-call-stack (current-error-port)))
 232     (cerror "Error: " args)))
 233
 234 ;;; define these as appropriate for your system.
 235 (define slib:tab #\tab)
 236 (define slib:form-feed #\page)
 237
 238 ;;; Define these if your implementation's syntax can support it and if
 239 ;;; they are not already defined.
 240
 241 ;(define (1+ n) (+ n 1))
 242 ;(define (-1+ n) (+ n -1))
 243 ;(define 1- -1+)
 244
 245 (define in-vicinity string-append)
 246
 247 ;;; Define SLIB:EXIT to be the implementation procedure to exit or
 248 ;;; return if exitting not supported.
 249 ; MacScheme does not return a value when it exits,
 250 ; so simply invoke system procedure exit with 0 args.
 251 (define slib:exit (lambda args (exit)))
 252
 253 ;;; Here for backward compatability
 254 (define scheme-file-suffix
 255   (let ((suffix (case (software-type)
 256                   ((NOSVE) "_scm")
 257                   (else ".scm"))))
 258     (lambda () suffix)))
 259
 260 ;;; (SLIB:LOAD-SOURCE "foo") should load "foo.scm" or with whatever
 261 ;;; suffix all the module files in SLIB have.  See feature 'SOURCE.
 262
 263 ;(define slib:load-source load)
 264 (define (slib:load-source f) (load (string-append f (scheme-file-suffix))))
 265
 266 ;;; (SLIB:LOAD-COMPILED "foo") should load the file that was produced
 267 ;;; by compiling "foo.scm" if this implementation can compile files.
 268 ;;; See feature 'COMPILED.
 269
 270 (define slib:load-compiled load)
 271
 272 ;;; At this point SLIB:LOAD must be able to load SLIB files.
 273
 274 (define slib:load slib:load-source)
 275
 276 (slib:load (in-vicinity (library-vicinity) "require"))