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Diffstat (limited to 's7.init')
| -rwxr-xr-x | s7.init | 417 |
1 files changed, 417 insertions, 0 deletions
@@ -0,0 +1,417 @@ +;;; "s7.init" Initialization for SLIB for S7 -*-scheme-*- +;;; Author: Aubrey Jaffer +;;; +;;; This code is in the public domain. + +;;; S7 is embedded in Snd or Sndlib; +;;; It does not exist as a stand-alone program. + +;;@ (software-type) should be set to the generic operating system type. +;;; unix, vms, macos, amiga and ms-dos are supported. +(define (software-type) 'unix) + +;;@ (scheme-implementation-type) should return the name of the scheme +;;; implementation loading this file. +(define (scheme-implementation-type) 's7) + +;;@ (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://ccrma.stanford.edu/software/snd/") + +;;@ (scheme-implementation-version) should return a string describing +;;; the version the scheme implementation loading this file. +(define scheme-implementation-version s7-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 ((impl-path + (or (getenv "S7_IMPLEMENTATION_PATH") + (case (software-type) + ((unix) "/usr/local/share/snd/") + ((vms) "scheme$src:") + ((ms-dos) "C:\\Program Files\\snd\\") + (else ""))))) + (lambda () impl-path))) + +;;@ (library-vicinity) should be defined to be the pathname of the +;;; directory where files of Scheme library functions reside. +(define library-vicinity + (let ((library-path + (or + ;; Use this getenv if your implementation supports it. + (getenv "SCHEME_LIBRARY_PATH") + ;; Use this path if your scheme does not support GETENV + ;; or if SCHEME_LIBRARY_PATH is not set. + (case (software-type) + ((unix) "/usr/local/lib/slib/") + ((vms) "lib$scheme:") + ((ms-dos) "C:\\Program Files\\slib\\") + (else ""))))) + (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) + (let ((home (getenv "HOME"))) + (and home + (case (software-type) + ((unix coherent ms-dos) ;V7 unix has a / on HOME + (if (eqv? #\/ (string-ref home (+ -1 (string-length home)))) + home + (string-append home "/"))) + (else home))))) + +;@ +(define in-vicinity string-append) + +;@ +(define (user-vicinity) + (case (software-type) + ((vms) "[.]") + (else ""))) + +(define *load-pathname* #f) ; *load-path* is a list of dirs in s7 + +;@ +(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))))))) + +;;@ SLIB:FEATURES is a list of symbols naming the (SLIB) features +;;; initially supported by this implementation. +(define slib:features + '( + source ;can load scheme source files + ;(SLIB:LOAD-SOURCE "filename") +;;; compiled ;can load compiled files + ;(SLIB:LOAD-COMPILED "filename") + vicinity + srfi-59 + srfi-96 + + ;; Scheme report features + ;; R5RS-compliant implementations should provide all 9 features. + +;;; r5rs ;conforms to + eval ;R5RS two-argument eval + values ;R5RS multiple values + dynamic-wind ;R5RS dynamic-wind + macro ;R5RS high level macros + +;;; delay ;has DELAY and FORCE +;;; "delay" is named "make-promise" in s7 + + 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 +;;; transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF + with-file ;has WITH-INPUT-FROM-FILE and + ;WITH-OUTPUT-TO-FILE + +;;; r4rs ;conforms to + +;;; ieee-p1178 ;conforms to +;;; I don't know what ieee-p1178 is + +;;; r3rs ;conforms to +;;; I don't know what this means + +;;; rev2-procedures ;SUBSTRING-MOVE-LEFT!, + ;SUBSTRING-MOVE-RIGHT!, + ;SUBSTRING-FILL!, + ;STRING-NULL?, APPEND!, 1+, + ;-1+, <?, <=?, =?, >?, >=? +;;; object-hash ;has OBJECT-HASH + + full-continuation ;can return multiple times +;;; ieee-floating-point ;conforms to IEEE Standard 754-1985 + ;IEEE Standard for Binary + ;Floating-Point Arithmetic. +;;; if this means all the NaN and inf stuff, then s7 does not conform + + ;; Other common features + +;;; srfi-0 ;srfi-0, COND-EXPAND finds all srfi-* +;;; sicp ;runs code from Structure and + ;Interpretation of Computer + ;Programs by Abelson and Sussman. +;;; ?? never tried to run it + + defmacro ;has Common Lisp DEFMACRO +;;; syntax-case ;has syncase:eval and syncase:load +;;; record ;has user defined data structures + string-port ;has CALL-WITH-INPUT-STRING and + ;CALL-WITH-OUTPUT-STRING +;;; sort +;;; s7 has sort! but not merge etc + +;;; pretty-print + object->string + format ;Common-lisp output formatting +;;; trace ;has macros: TRACE and UNTRACE +;;; s7 does have these functions, but not "print-call-stack" + +;;; compiler ;has (COMPILER) +;;; ed ;(ED) is editor + system ;posix (system <string>) + getenv ;posix (getenv <string>) +;;; program-arguments ;returns list of strings (argv) +;;; current-time ;returns time in seconds since 1/1/1970 + + ;; Implementation Specific features + random + + )) + +;;@ (FILE-POSITION <port> . <k>) +(define (file-position . args) #f) + +;;@ (OUTPUT-PORT-WIDTH <port>) +(define (output-port-width . arg) 79) + +;;@ (OUTPUT-PORT-HEIGHT <port>) +(define (output-port-height . arg) 24) + +;;@ (CURRENT-ERROR-PORT) +(define current-error-port + (let ((port (current-output-port))) + (lambda () port))) + +;;@ (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) #f) + +;;@ (DELETE-FILE <string>) +;(define (delete-file f) #f) + +;;@ 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 . arg) #t) + +;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string +;;; port versions of CALL-WITH-*PUT-FILE. + +;;@ "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 #x0FFFFFFF) + +;;@ 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 + (if (provided? 'trace) (print-call-stack (current-error-port))) + (apply 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+ n) (+ n 1)) +(define (-1+ n) (+ n -1)) +(define 1- -1+) + +;;@ Define SLIB:EXIT to be the implementation procedure to exit or +;;; return if exiting not supported. +(define slib:exit quit) + +;;@ Here for backward compatability +(define scheme-file-suffix + (let ((suffix (case (software-type) + ((nosve) "_scm") + (else ".scm")))) + (lambda () suffix))) + +;;@ (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 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 load) + +;;@ 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) + +(slib:load (in-vicinity (library-vicinity) "require")) |