diff options
Diffstat (limited to 'pscheme.init')
| -rw-r--r-- | pscheme.init | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/pscheme.init b/pscheme.init new file mode 100644 index 0000000..dfa05a8 --- /dev/null +++ b/pscheme.init @@ -0,0 +1,202 @@ +;;; "pscheme.init" -*-scheme-*-
+;;; SLIB init file for Pocket Scheme
+;;; SLIB orig Author: Aubrey Jaffer (jaffer@ai.mit.edu)
+;;; Author: Ben Goetter <goetter@angrygraycat.com>
+;;; Initial work for 0.2.3 by Robert Goldman (goldman@htc.honeywell.com)
+;;;
+;;; This code is in the public domain.
+
+; best fit for Windows CE?
+(define (software-type) 'MS-DOS)
+
+(define (scheme-implementation-type) 'PocketScheme)
+(define (scheme-implementation-version) "0.3.6")
+
+(define in-vicinity string-append)
+
+(define (implementation-vicinity)
+ "\\Program Files\\Pocket Scheme\\")
+
+(define (library-vicinity)
+ (in-vicinity (implementation-vicinity) "slib\\"))
+
+(define (home-vicinity)
+ "\\My Documents\\")
+
+(define *features*
+ '(source
+ rev4-report
+ ieee-p1178
+ rev4-optional-procedures
+ multiarg/and-
+ multiarg-apply
+ with-file
+ char-ready?
+ defmacro
+ delay
+ eval
+ dynamic-wind
+ full-continuation
+ ;;trace ; Comment out for SLIB TRACE macros
+ system
+ string-port
+ ))
+
+;;; (OUTPUT-PORT-WIDTH <port>)
+(define (output-port-width . arg) 79)
+
+;;; (OUTPUT-PORT-HEIGHT <port>)
+(define (output-port-height . arg) 12)
+
+;;; (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>)
+(define (file-exists? f)
+ (let ((file #f))
+ (with-handlers (((lambda (x) #t) (lambda (x) #f)))
+ (set! file (open-input-file f))
+ (close-input-port file)
+ #t)))
+
+;; pscheme: current-error-port, delete-file, force-output already defined
+
+;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
+;;; be returned by CHAR->INTEGER.
+;(define char-code-limit
+; (with-handlers (
+; ((lambda (x) #t) (lambda (x) 256))
+; )
+; (integer->char 65535)
+; 65536))
+;;; Currently there are only three clients of this symbol.
+;;; Following observations relate to PScheme 0.3.5, JACAL 1a9, SLIB 2c5.
+;;; JACAL: crashes when set to 65536.
+;;; make-crc: extremely inefficient when set to 65536, spending forever in init
+;;; precedence-parse: ignores any setting in excess of 256
+;;; So we patch it to 256.
+(define char-code-limit 256)
+
+;;; MOST-POSITIVE-FIXNUM is used in modular.scm
+;;; This is the most positive immediate-value fixnum in PScheme.
+;;; The secondary representation extends fixnum values to 0xffffffff.
+(define most-positive-fixnum #x07FFFFFF)
+
+;;; 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 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 slib:eval)
+
+(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*))
+ (set! *load-pathname* <pathname>)
+ (do ((o (read port) (read port)))
+ ((eof-object? o))
+ (evl o))
+ (set! *load-pathname* old-load-pathname)))))
+
+(define (defmacro:load <pathname>)
+ (slib:eval-load <pathname> defmacro:eval))
+
+(define slib:warn
+ (lambda args
+ (let ((port (current-error-port)))
+ (display "Warn: " port)
+ (for-each (lambda (x) (display x port)) args))))
+
+;;; Define an error procedure for the library
+(define (slib:error . k)
+ (error
+ (cond
+ ((= (length k) 0) '())
+ ((= (length k) 1) (car k))
+ ((provided? 'string-port)
+ (call-with-output-string
+ (lambda (out)
+ (let ((add-space #f))
+ (map
+ (lambda (arg)
+ (if add-space (write-char #\space out) (set! add-space #t))
+ (display arg out))
+ k)))))
+ (else (car k)))))
+
+;;; For the benefit of slib:error above, as announced by feature string-port
+(define (call-with-output-string t)
+ (let* ((p (open-output-string))
+ (r (t p))
+ (s (get-output-string p)))
+ (close-output-port p)
+ s))
+
+(define (call-with-input-string s t)
+ (let* ((p (open-input-string s))
+ (r (t p)))
+ (close-input-port p)
+ r))
+
+;;; 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+ n) (+ n 1))
+(define (-1+ n) (+ n -1))
+(define 1- -1+)
+
+;;; Define SLIB:EXIT to be the implementation procedure to exit or
+;;; return if exitting not supported.
+(define slib:exit exit)
+
+;;; Here for backward compatability
+(define (scheme-file-suffix) ".scm")
+
+;;; (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)
+ (if (not (file-exists? f))
+ (set! f (string-append f (scheme-file-suffix))))
+ (load f))
+
+;;; (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 load)
+
+;;; At this point SLIB:LOAD must be able to load SLIB files.
+
+(define slib:load slib:load-source)
+
+;;; Hold onto pscheme native version
+(define pscheme:require require)
+(slib:load (in-vicinity (library-vicinity) "require"))
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