diff options
Diffstat (limited to 'chez.init')
| -rw-r--r-- | chez.init | 143 |
1 files changed, 99 insertions, 44 deletions
@@ -58,17 +58,88 @@ home (string-append home "/"))) (else home))))) - -;;; *FEATURES* should be set to a list of symbols describing features -;;; of this implementation. Suggestions for features are: +;@ +(define in-vicinity string-append) +;@ +(define (user-vicinity) + (case (software-type) + ((VMS) "[.]") + (else ""))) + +(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 #f)) + (dynamic-wind + (lambda () (set! old (exchange path))) + thunk + (lambda () (exchange old))))))) + +;;@ *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") + ;(SLIB:LOAD-SOURCE "filename") compiled ;can load compiled files - ;(slib:load-compiled "filename") + ;(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 @@ -78,11 +149,16 @@ 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 @@ -90,43 +166,39 @@ 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 +;;; 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 -; ieee-floating-point ;conforms to IEEE Standard 754-1985 + 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 +;;; defmacro ;has Common Lisp DEFMACRO record ;has user defined data structures string-port ;has CALL-WITH-INPUT-STRING and ;CALL-WITH-OUTPUT-STRING 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 +;;; program-arguments ;returns list of strings (argv) +;;; current-time ;returns time in seconds since 1/1/1970 ;; Implementation Specific features @@ -264,13 +336,8 @@ ;(define (-1+ n) (+ n -1)) ;(define 1- -1+) -;;; (IN-VICINITY <string>) is simply STRING-APPEND, conventionally used -;;; to attach a directory pathname to the name of a file that is expected to -;;; be in that directory. -(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:chez:quit (let ((arg (call-with-current-continuation identity))) (cond ((procedure? arg) arg) @@ -398,21 +465,9 @@ (define (defmacro:eval x) (base:eval (defmacro:expand* x))) (define (defmacro:expand* x) (require 'defmacroexpand) (apply defmacro:expand* x '())) - -(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)) +;; slib:eval-load definition moved to "require.scm" (define slib:warn (lambda args |