ikarus/benchmarks/r6rs-benchmarks/tail.ss

42 lines
1.1 KiB
Scheme

;;; TAIL -- One of the Kernighan and Van Wyk benchmarks.
(library (r6rs-benchmarks tail)
(export main)
(import (r6rs) (r6rs-benchmarks))
(define inport #f)
(define outport #f)
(define (readline port line-so-far)
(let ((x (read-char port)))
(cond ((eof-object? x)
x)
((char=? x #\newline)
(list->string (reverse
(cons x line-so-far))))
(#t (readline port (cons x line-so-far))))))
(define (tail-r-aux port file-so-far)
(let ((x (readline port '())))
(if (eof-object? x)
(begin
(display file-so-far outport)
(close-output-port outport))
(tail-r-aux port (cons x file-so-far)))))
(define (tail-r port)
(tail-r-aux port '()))
(define (go)
(set! inport (open-input-file "bib"))
(set! outport (open-output-file "foo"))
(tail-r inport)
(close-input-port inport))
(define (main . args)
(run-benchmark
"tail"
tail-iters
(lambda (result) #t)
(lambda () (lambda () (go))))))