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* new (ikarus io-primitives unsafe) library exporting $write-char 

$read-char $unread-char $peek-char $reset-input-port! 
  $flush-output-port $close-input-port $close-output-port
This commit is contained in:
Abdulaziz Ghuloum 2007-05-05 18:32:56 -04:00
parent 3d79b43612
commit cc5b8d1c08
4 changed files with 68 additions and 53 deletions
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BIN
src/ikarus.boot
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66
src/ikarus.io-primitives.unsafe.ss Normal file
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@ -0,0 +1,66 @@
(library (ikarus io-primitives unsafe)
(export $write-char $read-char $unread-char $peek-char
$reset-input-port! $flush-output-port
$close-input-port $close-output-port)
(import
(ikarus)
(only (scheme) $port-handler $port-output-buffer
$set-port-output-index! $port-output-size
$set-port-input-index! $port-input-buffer $port-input-size
$set-port-input-size!
$port-input-index
$fxadd1 $fxsub1 $fx< $fx>= $string-ref
$string-length $string-set!))
(define $write-char
(lambda (c p)
(let ([idx (port-output-index p)])
(if ($fx< idx ($port-output-size p))
(begin
($string-set! ($port-output-buffer p) idx c)
($set-port-output-index! p ($fxadd1 idx)))
(($port-handler p) 'write-char c p)))))
(define $read-char
(lambda (p)
(let ([idx ($port-input-index p)])
(if ($fx< idx ($port-input-size p))
(begin
($set-port-input-index! p ($fxadd1 idx))
($string-ref ($port-input-buffer p) idx))
(begin
(($port-handler p) 'read-char p))))))
(define $peek-char
(lambda (p)
(let ([idx ($port-input-index p)])
(if ($fx< idx ($port-input-size p))
($string-ref ($port-input-buffer p) idx)
(($port-handler p) 'peek-char p)))))
(define $unread-char
(lambda (c p)
(let ([idx ($fxsub1 ($port-input-index p))])
(if (and ($fx>= idx 0)
($fx< idx ($port-input-size p)))
(begin
($set-port-input-index! p idx)
($string-set! ($port-input-buffer p) idx c))
(($port-handler p) 'unread-char c p)))))
(define $reset-input-port!
(lambda (p)
($set-port-input-size! p 0)))
(define $close-input-port
(lambda (p)
(($port-handler p) 'close-port p)))
(define $close-output-port
(lambda (p)
(($port-handler p) 'close-port p)))
(define $flush-output-port
(lambda (p)
(($port-handler p) 'flush-output-port p))))

53
src/libchezio.ss
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@ -33,14 +33,6 @@
(let () ;;; IO PRIMITIVES
;;;
(primitive-set! '$write-char
(lambda (c p)
(let ([idx (port-output-index p)])
(if ($fx< idx ($port-output-size p))
(begin
($string-set! ($port-output-buffer p) idx c)
($set-port-output-index! p ($fxadd1 idx)))
(($port-handler p) 'write-char c p)))))
;;;
(primitive-set! 'write-char
(case-lambda
@ -74,15 +66,6 @@
(error 'port-name "~s is not a port" p))))
(primitive-set! 'input-port-name port-name)
(primitive-set! 'output-port-name port-name)
(primitive-set! '$read-char
(lambda (p)
(let ([idx ($port-input-index p)])
(if ($fx< idx ($port-input-size p))
(begin
($set-port-input-index! p ($fxadd1 idx))
($string-ref ($port-input-buffer p) idx))
(begin
(($port-handler p) 'read-char p))))))
;;;
(primitive-set! 'read-char
(case-lambda
@ -92,15 +75,6 @@
($read-char p)
(error 'read-char "~s is not an input-port" p))]))
;;;
(primitive-set! '$unread-char
(lambda (c p)
(let ([idx ($fxsub1 ($port-input-index p))])
(if (and ($fx>= idx 0)
($fx< idx ($port-input-size p)))
(begin
($set-port-input-index! p idx)
($string-set! ($port-input-buffer p) idx c))
(($port-handler p) 'unread-char c p)))))
;;;
(primitive-set! 'unread-char
(case-lambda
@ -114,12 +88,6 @@
(error 'unread-char "~s is not a character" c))
(error 'unread-char "~s is not an input-port" p))]))
;;;
(primitive-set! '$peek-char
(lambda (p)
(let ([idx ($port-input-index p)])
(if ($fx< idx ($port-input-size p))
($string-ref ($port-input-buffer p) idx)
(($port-handler p) 'peek-char p)))))
;;;
(primitive-set! 'peek-char
(case-lambda
@ -129,19 +97,7 @@
($peek-char p)
(error 'peek-char "~s is not an input-port" p))]))
;;;
(primitive-set! '$unread-char
(lambda (c p)
(let ([idx ($fxsub1 ($port-input-index p))])
(if (and ($fx>= idx 0)
($fx< idx ($port-input-size p)))
(begin
($set-port-input-index! p idx)
($string-set! ($port-input-buffer p) idx c))
(($port-handler p) 'unread-char c p)))))
;;;
(primitive-set! '$reset-input-port!
(lambda (p)
($set-port-input-size! p 0)))
;;;
(primitive-set! 'reset-input-port!
(case-lambda
@ -151,9 +107,6 @@
($reset-input-port! p)
(error 'reset-input-port! "~s is not an input-port" p))]))
;;;
(primitive-set! '$close-input-port
(lambda (p)
(($port-handler p) 'close-port p)))
;;;
(primitive-set! 'close-input-port
(case-lambda
@ -163,9 +116,6 @@
($close-input-port p)
(error 'close-input-port! "~s is not an input-port" p))]))
;;;
(primitive-set! '$close-output-port
(lambda (p)
(($port-handler p) 'close-port p)))
;;;
(primitive-set! 'close-output-port
(case-lambda
@ -175,9 +125,6 @@
($close-output-port p)
(error 'close-output-port "~s is not an output-port" p))]))
;;;
(primitive-set! '$flush-output-port
(lambda (p)
(($port-handler p) 'flush-output-port p)))
;;;
(primitive-set! 'flush-output-port
(case-lambda

2
src/makefile.ss
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@ -42,7 +42,9 @@
"ikarus.command-line.ss"
"ikarus.core.ss"
"ikarus.io-ports.ss"
"ikarus.io-primitives.unsafe.ss"
"libchezio.ss"
"libhash.ss"