diff options
Diffstat (limited to 'scheme2c.init')
| -rw-r--r-- | scheme2c.init | 159 |
1 files changed, 108 insertions, 51 deletions
diff --git a/scheme2c.init b/scheme2c.init index a9dbab9..057dc76 100644 --- a/scheme2c.init +++ b/scheme2c.init @@ -58,79 +58,152 @@ home (string-append home "/"))) (else home))))) +;@ +(define in-vicinity string-append) +;@ +(define (user-vicinity) + (case (software-type) + ((VMS) "[.]") + (else ""))) -;;; *FEATURES* should be set to a list of symbols describing features -;;; of this implementation. See Template.scm for the list of feature -;;; names. +(define *load-pathname* #f) +;@ +(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 (exchange path)) + (val (thunk))) + (exchange old) + val)))) + +;;@ *FEATURES* is a list of symbols naming the (SLIB) features +;;; initially supported by this implementation. (define *features* '( source ;can load scheme source files - ;(slib:load-source "filename") -; compiled ;can load compiled files - ;(slib:load-compiled "filename") + ;(SLIB:LOAD-SOURCE "filename") +;;; compiled ;can load compiled files + ;(SLIB:LOAD-COMPILED "filename") + vicinity + srfi-59 ;; 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 +;;; 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 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 - rev4-optional-procedures ;LIST-TAIL, STRING->LIST, - ;LIST->STRING, STRING-COPY, - ;STRING-FILL!, LIST->VECTOR, - ;VECTOR->LIST, and VECTOR-FILL! + transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF + with-file ;has WITH-INPUT-FROM-FILE and + ;WITH-OUTPUT-TO-FILE r4rs ;conforms to ;; Follows rev4 as far as I can tell, modulo '() being false, ;; number syntax (see doc), incomplete tail recursion (see ;; docs) and a couple of bugs in some versions -- see below. -; ieee-p1178 ;conforms to +;;; ieee-p1178 ;conforms to r3rs ;conforms to -; rev2-procedures ;SUBSTRING-MOVE-LEFT!, +;;; rev2-procedures ;SUBSTRING-MOVE-LEFT!, ;SUBSTRING-MOVE-RIGHT!, ;SUBSTRING-FILL!, ;STRING-NULL?, APPEND!, 1+, ;-1+, <?, <=?, =?, >?, >=? object-hash ;has OBJECT-HASH - multiarg/and- ;/ and - can take more than 2 args. - with-file ;has WITH-INPUT-FROM-FILE and - ;WITH-OUTPUT-TO-FILE - transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF + full-continuation ;can return multiple times ieee-floating-point ;conforms to IEEE Standard 754-1985 ;IEEE Standard for Binary ;Floating-Point Arithmetic. - full-continuation ;can return multiple times ;; Other common features -; srfi ;srfi-0, COND-EXPAND finds all srfi-* -; sicp ;runs code from Structure and +;;; srfi ;srfi-0, COND-EXPAND finds all srfi-* +;;; sicp ;runs code from Structure and ;Interpretation of Computer ;Programs by Abelson and Sussman. -; defmacro ;has Common Lisp DEFMACRO -; record ;has user defined data structures +;;; defmacro ;has Common Lisp DEFMACRO +;;; record ;has user defined data structures string-port ;has CALL-WITH-INPUT-STRING and ;CALL-WITH-OUTPUT-STRING -; sort +;;; sort pretty-print -; object->string +;;; object->string format ;Common-lisp output formatting trace ;has macros: TRACE and UNTRACE -; compiler ;has (COMPILER) -; ed ;(ED) is editor +;;; 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 +;;; getenv ;posix (getenv <string>) +;;; program-arguments ;returns list of strings (argv) +;;; current-time ;returns time in seconds since 1/1/1970 + + ;; Implementation Specific features + )) (define pretty-print pp) @@ -267,18 +340,7 @@ ;;; If your implementation provides R4RS macros: ;(define macro:eval slib:eval) ;(define macro:load load) - -(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))))) +;; slib:eval-load definition moved to "require.scm" (define slib:warn (lambda args @@ -331,13 +393,8 @@ ;;(define force force) -;;; (implementation-vicinity) should be defined to be the pathname of -;;; the directory where any auxillary files to your Scheme -;;; implementation reside. -(define in-vicinity string-append) - ;;; Define SLIB:EXIT to be the implementation procedure to exit or -;;; return if exitting not supported. +;;; return if exiting not supported. (define slib:exit (lambda args (exit))) ;;; Here for backward compatability |