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utf16 output ports now work.

This commit is contained in:
Abdulaziz Ghuloum 2008-10-21 03:31:44 -04:00
parent b63055aed0
commit d8058e0cbf
1 changed files with 32 additions and 7 deletions
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39
scheme/ikarus.io.ss
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@ -218,6 +218,7 @@
(define fast-u8-text-tag #b00000001100000)
(define fast-u16be-text-tag #b00000010000000)
(define fast-u16le-text-tag #b00000100000000)
(define init-u16-text-tag #b00000110000000)
(define r6rs-mode-tag #b01000000000000)
(define closed-port-tag #b10000000000000)
@ -238,6 +239,9 @@
(define fast-put-char-tag #b00000000010110)
(define fast-put-utf8-tag #b00000000100110)
(define fast-put-latin-tag #b00000001100110)
(define fast-put-utf16be-tag #b00000010000110)
(define fast-put-utf16le-tag #b00000100000110)
(define init-put-utf16-tag #b00000110000110)
(define fast-attrs-mask #b111111111111)
(define-syntax $port-fast-attrs
@ -421,6 +425,8 @@
(fxior textual-output-port-bits fast-u8-text-tag)]
[(eq? 'utf-8-codec (transcoder-codec x))
(fxior textual-output-port-bits fast-u7-text-tag)]
[(eq? 'utf-16-codec (transcoder-codec x))
(fxior textual-output-port-bits init-u16-text-tag)]
[else (die who "unsupported codec" (transcoder-codec x))]))
(define open-bytevector-input-port
@ -1955,14 +1961,14 @@
(module (put-char write-char put-string)
(import UNSAFE)
(define (put-byte! p b who)
(let ([i ($port-index p)] [j ($port-size p)])
(assert* (fx< i j))
(bytevector-u8-set! ($port-buffer p) i b)
(let ([i (fx+ i 1)])
($set-port-index! p i)
(when (fx= i j) (flush-output-port p)))))
(define (put-char-utf8-mode p b who)
(define (put-byte! p b who)
(let ([i ($port-index p)] [j ($port-size p)])
(assert* (fx< i j))
(bytevector-u8-set! ($port-buffer p) i b)
(let ([i (fx+ i 1)])
($set-port-index! p i)
(when (fx= i j) (flush-output-port p)))))
(cond
[(fx< b 128)
(put-byte! p b who)]
@ -2039,6 +2045,25 @@
[(raise)
(raise (make-i/o-encoding-error p c))]
[else (die who "BUG: invalid error handling mode" p)])])))]
[(eq? m init-put-utf16-tag)
(put-byte! p #xFE who)
(put-byte! p #xFF who)
($set-port-attrs! p fast-put-utf16be-tag)
(do-put-char p c who)]
[(eq? m fast-put-utf16be-tag)
(let ([n (char->integer c)])
(cond
[(fx< n #x10000)
(put-byte! p (fxsra n 8) who)
(put-byte! p (fxand n #xFF) who)]
[else
(let ([u^ (fx- n #x10000)])
(let ([w1 (fxior #xD800 (fxsra u^ 10))])
(put-byte! p (fxsra w1 8) who)
(put-byte! p (fxand w1 #xFF) who))
(let ([w2 (fxior #xDC00 (fxand u^ (- (fxsll 1 10) 1)))])
(put-byte! p (fxsra w2 8) who)
(put-byte! p (fxand w2 #xFF) who)))]))]
[else
(if (output-port? p)
(if (textual-port? p)