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; -*- Mode: Scheme; Syntax: Scheme; Package: Scheme; -*-
; Copyright (c) 1993-2008 by Richard Kelsey and Jonathan Rees. See file COPYING.
; This is file plt-features.scm.
; Synchronize any changes with all the other *-features.scm files.
; SIGNALS
; ERROR is built-in
(define (format-error-message message irritants)
(apply string-append message
(map (lambda (irritant)
(string-append " " ((error-value->string-handler) irritant 1000)))
irritants)))
(define (warn message . irritants)
(void)
(display (format-error-message message irritants)
(current-error-port))
(newline (current-error-port))
)
(define (signal type . stuff)
(apply warn "condition signalled" type stuff))
(define (syntax-error . rest) ; Must return a valid expression.
(apply warn rest)
''syntax-error)
(define (call-error message proc . args)
(error message (cons proc args)))
; FEATURES
(define force-output flush-output)
(define current-noise-port current-error-port)
(define (string-hash s) (abs (equal-hash-code s)))
(define (make-immutable! thing) thing) ; PLT can only do this upon construction
; IMMUTABLE? is built in
; BITWISE
; ARITHMETIC-SHIFT is built-in
; BITWISE-AND is built-in
; BITWISE-IOR is built-in
; BITWISE-NOT is built-in
; ASCII
(define char->ascii char->integer)
(define ascii->char integer->char)
(define ascii-limit 127)
(define ascii-whitespaces '(32 10 9 12 13))
; CELLS
(define make-cell box)
(define cell-ref unbox)
(define cell-set! set-box!)
; CODE-VECTORS
(define make-code-vector make-bytes)
(define code-vector? bytes?)
(define code-vector-ref bytes-ref)
(define code-vector-set! bytes-set!)
(define code-vector-length bytes-length)
; BINARY I/O
; WRITE-BYTE is built-in
(define (set-port-crlf?! port val)
(values))
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