;;; Ikarus Scheme -- A compiler for R6RS Scheme. ;;; Copyright (C) 2006,2007 Abdulaziz Ghuloum ;;; ;;; This program is free software: you can redistribute it and/or modify ;;; it under the terms of the GNU General Public License version 3 as ;;; published by the Free Software Foundation. ;;; ;;; This program is distributed in the hope that it will be useful, but ;;; WITHOUT ANY WARRANTY; without even the implied warranty of ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;;; General Public License for more details. ;;; ;;; You should have received a copy of the GNU General Public License ;;; along with this program. If not, see . (library (io-spec) (export port? input-port? output-port? textual-port? binary-port? open-file-input-port open-input-file call-with-input-file with-input-from-file standard-input-port current-input-port open-bytevector-input-port open-string-input-port with-input-from-string make-custom-binary-input-port make-custom-binary-output-port make-custom-textual-input-port make-custom-textual-output-port transcoded-port port-transcoder close-port close-input-port close-output-port port-eof? get-char lookahead-char read-char peek-char get-string-n get-string-n! get-string-all get-line get-u8 lookahead-u8 get-bytevector-n get-bytevector-n! get-bytevector-some get-bytevector-all ;port-has-port-position? port-position ;port-has-set-port-position!? set-port-position! call-with-port flush-output-port put-u8 put-char write-char put-string open-bytevector-output-port call-with-bytevector-output-port open-string-output-port with-output-to-string call-with-string-output-port standard-output-port standard-error-port current-output-port current-error-port open-file-output-port open-output-file call-with-output-file with-output-to-file console-output-port console-error-port console-input-port newline input-port-name output-port-name port-mode set-port-mode! reset-input-port! port-id input-port-byte-position process ) (import (ikarus system $io) (except (ikarus) port? input-port? output-port? textual-port? binary-port? open-file-input-port open-input-file call-with-input-file with-input-from-file standard-input-port current-input-port open-bytevector-input-port open-string-input-port with-input-from-string make-custom-binary-input-port make-custom-binary-output-port make-custom-textual-input-port make-custom-textual-output-port transcoded-port port-transcoder close-port close-input-port close-output-port port-eof? get-char lookahead-char read-char peek-char get-string-n get-string-n! get-string-all get-line get-u8 lookahead-u8 get-bytevector-n get-bytevector-n! get-bytevector-some get-bytevector-all ;port-has-port-position? port-position ;port-has-set-port-position!? set-port-position! call-with-port flush-output-port put-u8 put-char write-char put-string open-bytevector-output-port call-with-bytevector-output-port open-string-output-port with-output-to-string call-with-string-output-port standard-output-port standard-error-port current-output-port current-error-port open-file-output-port open-output-file call-with-output-file with-output-to-file console-output-port console-input-port console-error-port newline input-port-name output-port-name port-mode set-port-mode! reset-input-port! port-id input-port-byte-position process)) (module UNSAFE (fx< fx<= fx> fx>= fx= fx+ fx- fxior fxand fxsra fxsll integer->char char->integer string-ref string-set! string-length bytevector-u8-ref bytevector-u8-set!) (import (rename (ikarus system $strings) ($string-length string-length) ($string-ref string-ref) ($string-set! string-set!)) (rename (ikarus system $chars) ($char->fixnum char->integer) ($fixnum->char integer->char)) (rename (ikarus system $bytevectors) ($bytevector-set! bytevector-u8-set!) ($bytevector-u8-ref bytevector-u8-ref)) (rename (ikarus system $fx) ($fxsra fxsra) ($fxsll fxsll) ($fxlogor fxior) ($fxlogand fxand) ($fx+ fx+) ($fx- fx-) ($fx< fx<) ($fx> fx>) ($fx>= fx>=) ($fx<= fx<=) ($fx= fx=)))) (define (port? x) (import (only (ikarus) port?)) (port? x)) (define-syntax define-rrr (syntax-rules () [(_ name) (define (name . args) (apply die 'name "not implemented" args))])) (define-syntax u8? (let () (import (ikarus system $fx)) (syntax-rules () [(_ x) ($fxzero? ($fxlogand x -256))]))) ;(define (u8? x) (and (fixnum? x) (fx>= x 0) (fx< x 256))) (define (textual-port? x) (fx= (fxand ($port-tag x) textual-port-tag) textual-port-tag)) (define (binary-port? x) (fx= (fxand ($port-tag x) binary-port-tag) binary-port-tag)) (define (output-port? x) (fx= (fxand ($port-tag x) output-port-tag) output-port-tag)) (define (input-port? x) (fx= (fxand ($port-tag x) input-port-tag) input-port-tag)) ;;; everything above this line will turn into primitive ;;; ---------------------------------------------------------- (define input-port-tag #b00000000000001) (define output-port-tag #b00000000000010) (define textual-port-tag #b00000000000100) (define binary-port-tag #b00000000001000) (define fast-char-text-tag #b00000000010000) (define fast-u7-text-tag #b00000000100000) (define fast-u8-text-tag #b00000001100000) (define r6rs-mode-tag #b01000000000000) (define closed-port-tag #b10000000000000) (define port-type-mask #b00000000001111) (define binary-input-port-bits #b00000000001001) (define binary-output-port-bits #b00000000001010) (define textual-input-port-bits #b00000000000101) (define textual-output-port-bits #b00000000000110) (define fast-get-byte-tag #b00000000001001) (define fast-get-char-tag #b00000000010101) (define fast-get-utf8-tag #b00000000100101) (define fast-get-latin-tag #b00000001100101) (define fast-put-byte-tag #b00000000001010) (define fast-put-char-tag #b00000000010110) (define fast-put-utf8-tag #b00000000100110) (define fast-put-latin-tag #b00000001100110) (define fast-attrs-mask #xFFF) (define ($port-fast-attrs x) (fxand ($port-tag x) fast-attrs-mask)) (define (input-port-name p) (if (input-port? p) ($port-id p) (die 'input-port-name "not an input port" p))) (define (output-port-name p) (if (output-port? p) ($port-id p) (die 'output-port-name "not an output port" p))) (define (port-id p) (if (port? p) ($port-id p) (die 'port-id "not a port" p))) (define (input-port-byte-position p) (if (input-port? p) (let ([pos ($port-position p)]) (and pos (fx+ pos (fx+ ($port-index p) 1)))) (error 'input-port-byte-position "not an input port" p))) (define guarded-port (let ([G (make-guardian)]) (define (clean-up) (cond [(G) => (lambda (p) (close-port p) (clean-up))])) (lambda (p) (clean-up) (when (fixnum? ($port-cookie p)) (G p)) p))) (define ($make-custom-binary-port attrs init-size id read! write! get-position set-position! close buffer-size) (let ([bv (make-bytevector buffer-size)]) ($make-port attrs 0 init-size bv #f id read! write! get-position set-position! close #f))) (define ($make-custom-textual-port attrs init-size id read! write! get-position set-position! close buffer-size) (let ([bv (make-string buffer-size)]) ($make-port attrs 0 init-size bv #t id read! write! get-position set-position! close #f))) (define (make-custom-binary-input-port id read! get-position set-position! close) ;;; FIXME: get-position and set-position! are ignored for now (define who 'make-custom-binary-input-port) (unless (string? id) (die who "id is not a string" id)) (unless (procedure? read!) (die who "read! is not a procedure" read!)) (unless (or (procedure? close) (not close)) (die who "close should be either a procedure or #f" close)) ($make-custom-binary-port binary-input-port-bits 0 id read! #f get-position set-position! close 256)) (define (make-custom-binary-output-port id write! get-position set-position! close) ;;; FIXME: get-position and set-position! are ignored for now (define who 'make-custom-binary-output-port) (unless (string? id) (die who "id is not a string" id)) (unless (procedure? write!) (die who "write! is not a procedure" write!)) (unless (or (procedure? close) (not close)) (die who "close should be either a procedure or #f" close)) ($make-custom-binary-port binary-output-port-bits 256 id #f write! get-position set-position! close 256)) (define (make-custom-textual-input-port id read! get-position set-position! close) ;;; FIXME: get-position and set-position! are ignored for now (define who 'make-custom-textual-input-port) (unless (string? id) (die who "id is not a string" id)) (unless (procedure? read!) (die who "read! is not a procedure" read!)) (unless (or (procedure? close) (not close)) (die who "close should be either a procedure or #f" close)) ($make-custom-textual-port (fxior textual-input-port-bits fast-char-text-tag) 0 id read! #f get-position set-position! close 256)) (define (make-custom-textual-output-port id write! get-position set-position! close) ;;; FIXME: get-position and set-position! are ignored for now (define who 'make-custom-textual-output-port) (unless (string? id) (die who "id is not a string" id)) (unless (procedure? write!) (die who "write! is not a procedure" write!)) (unless (or (procedure? close) (not close)) (die who "close should be either a procedure or #f" close)) ($make-custom-textual-port (fxior textual-output-port-bits fast-char-text-tag) 256 id #f write! get-position set-position! close 256)) (define (input-transcoder-attrs x) (cond [(not x) ;;; binary input port binary-input-port-bits] [(and (eq? 'latin-1-codec (transcoder-codec x)) (eq? 'none (transcoder-eol-style x))) (fxior textual-input-port-bits fast-u8-text-tag)] ;;; attrs for utf-8-codec are set as part of the ;;; bom-reading dance when the first char is read. [else textual-input-port-bits])) (define (output-transcoder-attrs x) (cond [(not x) ;;; binary input port binary-output-port-bits] [(and (eq? 'latin-1-codec (transcoder-codec x)) (eq? 'none (transcoder-eol-style x))) (fxior textual-output-port-bits fast-u8-text-tag)] [(and (eq? 'utf-8-codec (transcoder-codec x)) (eq? 'none (transcoder-eol-style x))) (fxior textual-output-port-bits fast-u7-text-tag)] [else textual-output-port-bits])) (define open-bytevector-input-port (case-lambda [(bv) (open-bytevector-input-port bv #f)] [(bv maybe-transcoder) (unless (bytevector? bv) (die 'open-bytevector-input-port "not a bytevector" bv)) (when (and maybe-transcoder (not (transcoder? maybe-transcoder))) (die 'open-bytevector-input-port "not a transcoder" maybe-transcoder)) ($make-port (input-transcoder-attrs maybe-transcoder) 0 (bytevector-length bv) bv maybe-transcoder "*bytevector-input-port*" (lambda (bv i c) 0) ;;; read! #f ;;; write! #f ;;; FIXME: get-position #f ;;; FIXME: set-position! #f ;;; close #f)])) (define open-bytevector-output-port (case-lambda [() (open-bytevector-output-port #f)] [(transcoder) (define who 'open-bytevector-output-port) (unless (or (not transcoder) (transcoder? transcoder)) (die who "invalid transcoder value" transcoder)) (let ([buf* '()] [buffer-size 256]) (let ([p ($make-port (output-transcoder-attrs transcoder) 0 buffer-size (make-bytevector buffer-size) transcoder "*bytevector-output-port*" #f (lambda (bv i c) (unless (= c 0) (let ([x (make-bytevector c)]) (bytevector-copy! bv i x 0 c) (set! buf* (cons x buf*)))) c) #f ;;; FIXME: get-position #f ;;; FIXME: set-position! #f #f)]) (values p (lambda () (define (append-bv-buf* ls) (let f ([ls ls] [i 0]) (cond [(null? ls) (values (make-bytevector i) 0)] [else (let* ([a (car ls)] [n (bytevector-length a)]) (let-values ([(bv i) (f (cdr ls) (fx+ i n))]) (bytevector-copy! a 0 bv i n) (values bv (fx+ i n))))]))) (unless ($port-closed? p) (flush-output-port p)) (let-values ([(bv len) (append-bv-buf* buf*)]) (set! buf* '()) bv)))))])) (define call-with-bytevector-output-port (case-lambda [(proc) (call-with-bytevector-output-port proc #f)] [(proc transcoder) (define who 'call-with-bytevector-output-port) (unless (procedure? proc) (die who "not a procedure" proc)) (unless (or (not transcoder) (transcoder? transcoder)) (die who "invalid transcoder argument" transcoder)) (let-values ([(p extract) (open-bytevector-output-port transcoder)]) (proc p) (extract))])) (define (call-with-string-output-port proc) (define who 'call-with-string-output-port) (unless (procedure? proc) (die who "not a procedure" proc)) (let-values ([(p extract) (open-string-output-port)]) (proc p) (extract))) (define (with-output-to-string proc) (define who 'with-output-to-string) (unless (procedure? proc) (die who "not a procedure" proc)) (let-values ([(p extract) (open-string-output-port)]) (parameterize ([*the-output-port* p]) (proc)) (extract))) (define (open-string-output-port) (define who 'open-string-output-port) (let ([buf* '()] [buffer-size 256]) (let ([p ($make-port (fxior textual-output-port-bits fast-char-text-tag) 0 buffer-size (make-string buffer-size) #t ;;; transcoder "*string-output-port*" #f (lambda (str i c) (unless (= c 0) (let ([x (make-string c)]) (string-copy! str i x 0 c) (set! buf* (cons x buf*)))) c) #f ;;; FIXME: get-position #f ;;; FIXME: set-position! #f #f)]) (values p (lambda () (define (append-str-buf* ls) (let f ([ls ls] [i 0]) (cond [(null? ls) (values (make-string i) 0)] [else (let* ([a (car ls)] [n (string-length a)]) (let-values ([(bv i) (f (cdr ls) (fx+ i n))]) (string-copy! a 0 bv i n) (values bv (fx+ i n))))]))) (unless ($port-closed? p) (flush-output-port p)) (let-values ([(bv len) (append-str-buf* buf*)]) (set! buf* '()) bv)))))) (define (open-string-input-port str) (unless (string? str) (die 'open-string-input-port str)) ($make-port (fxior textual-input-port-bits fast-char-text-tag) 0 (string-length str) str #t ;;; transcoder "*string-input-port*" (lambda (str i c) 0) ;;; read! #f ;;; write! #f ;;; FIXME: get-position #f ;;; FIXME: set-position! #f ;;; close #f)) (define (transcoded-port p transcoder) (define who 'transcoded-port) (unless (transcoder? transcoder) (die who "not a transcoder" transcoder)) (unless (port? p) (die who "not a port" p)) (when ($port-transcoder p) (die who "not a binary port" p)) (when ($port-closed? p) (die who "cannot transcode closed port" p)) (let ([read! ($port-read! p)] [write! ($port-write! p)]) ($mark-port-closed! p) (guarded-port ($make-port (cond [read! (input-transcoder-attrs transcoder)] [write! (output-transcoder-attrs transcoder)] [else (die 'transcoded-port "port is neither input nor output!")]) ($port-index p) ($port-size p) ($port-buffer p) transcoder ($port-id p) read! write! ($port-get-position p) ($port-set-position! p) ($port-close p) ($port-cookie p))))) (define (reset-input-port! p) (if (input-port? p) ($set-port-index! p ($port-size p)) (die 'reset-input-port! "not an input port" p))) (define (port-transcoder p) (if (port? p) (let ([tr ($port-transcoder p)]) (and (transcoder? tr) tr)) (die 'port-transcoder "not a port" p))) (define ($port-closed? p) (not (fxzero? (fxand ($port-attrs p) closed-port-tag)))) (define ($mark-port-closed! p) ($set-port-attrs! p (fxior closed-port-tag (fxand ($port-attrs p) port-type-mask)))) (define (port-mode p) (if (port? p) (if (fxzero? (fxand ($port-attrs p) r6rs-mode-tag)) 'ikarus-mode 'r6rs-mode) (die 'port-mode "not a port" p))) (define (set-port-mode! p mode) (if (port? p) (case mode [(r6rs-mode) ($set-port-attrs! p (fxior ($port-attrs p) r6rs-mode-tag))] [(ikarus-mode) ($set-port-attrs! p (fxand ($port-attrs p) (fxnot r6rs-mode-tag)))] [else (die 'set-port-mode! "invalid mode" mode)]) (die 'set-port-mode! "not a port" p))) (define flush-output-port (case-lambda [() (flush-output-port (*the-output-port*))] [(p) (unless (output-port? p) (die 'flush-output-port "not an output port" p)) (when ($port-closed? p) (die 'flush-output-port "port is closed" p)) (let ([idx ($port-index p)] [buf ($port-buffer p)]) (unless (fx= idx 0) (let ([bytes (($port-write! p) buf 0 idx)]) (unless (and (fixnum? bytes) (fx>= bytes 0) (fx<= bytes idx)) (die 'flush-output-port "write! returned an invalid value" bytes)) (cond [(fx= bytes idx) ($set-port-index! p 0)] [(fx= bytes 0) (die 'flush-output-port "could not write bytes to sink")] [else (bytevector-copy! buf bytes buf 0 (fx- idx bytes)) ($set-port-index! p (fx- idx bytes)) (flush-output-port p)]))))])) (define ($close-port p) (cond [($port-closed? p) (void)] [else (when ($port-write! p) (flush-output-port p)) ($mark-port-closed! p) (let ([close ($port-close p)]) (when (procedure? close) (close)))])) (define (close-port p) (unless (port? p) (die 'close-port "not a port" p)) ($close-port p)) (define (close-input-port p) (unless (input-port? p) (die 'close-input-port "not an input port" p)) ($close-port p)) (define (close-output-port p) (unless (output-port? p) (die 'close-output-port "not an output port" p)) ($close-port p)) ;(define-rrr port-has-port-position?) ;(define-rrr port-position) ;(define-rrr port-has-set-port-position!?) ;(define-rrr set-port-position!) ;;; ---------------------------------------------------------- (module (read-char get-char lookahead-char) (import UNSAFE) (define (refill-bv-buffer p who) (when ($port-closed? p) (die who "port is closed" p)) (let ([bv ($port-buffer p)] [i ($port-index p)] [j ($port-size p)]) (let ([c0 (fx- j i)]) (bytevector-copy! bv i bv 0 c0) (let ([pos ($port-position p)]) (when pos ($set-port-position! p (fx+ pos i)))) (let* ([max (fx- (bytevector-length bv) c0)] [c1 (($port-read! p) bv c0 max)]) (unless (fixnum? c1) (die who "invalid return value from read! procedure" c1)) (cond [(fx>= j 0) (unless (fx<= j max) (die who "read! returned a value out of range" j)) ($set-port-index! p c0) ($set-port-size! p (fx+ c1 c0)) c1] [else (die who "read! returned a value out of range" c1)]))))) (define (get-char-latin-mode p who inc) (let ([n (refill-bv-buffer p who)]) (cond [(fx= n 0) (eof-object)] [else (let ([idx ($port-index p)]) ($set-port-index! p (fx+ idx inc)) (integer->char (bytevector-u8-ref ($port-buffer p) idx)))]))) (define (get-char-utf8-mode p who) (define (do-error p who) (case (transcoder-error-handling-mode ($port-transcoder p)) [(ignore) (get-char p)] [(replace) #\xFFFD] [(raise) (raise (make-i/o-decoding-error p))] [else (die who "cannot happen")])) (let ([i ($port-index p)] [j ($port-size p)] [buf ($port-buffer p)]) (cond [(fx= i j) ;;; exhausted (let ([bytes (refill-bv-buffer p who)]) (cond [(fx= bytes 0) (eof-object)] [else (get-char p)]))] [else (let ([b0 (bytevector-u8-ref buf i)]) (cond [(fx= (fxsra b0 5) #b110) ;;; two-byte-encoding (let ([i (fx+ i 1)]) (cond [(fx< i j) (let ([b1 (bytevector-u8-ref buf i)]) (cond [(fx= (fxsra b1 6) #b10) ($set-port-index! p (fx+ i 1)) (integer->char (fxior (fxand b1 #b111111) (fxsll (fxand b0 #b11111) 6)))] [else ($set-port-index! p i) (do-error p who)]))] [else (let ([bytes (refill-bv-buffer p who)]) (cond [(fx= bytes 0) ($set-port-index! p (fx+ ($port-index p) 1)) (do-error p who)] [else (get-char-utf8-mode p who)]))]))] [(fx= (fxsra b0 4) #b1110) ;;; three-byte-encoding (cond [(fx< (fx+ i 2) j) (let ([b1 (bytevector-u8-ref buf (fx+ i 1))] [b2 (bytevector-u8-ref buf (fx+ i 2))]) (cond [(fx= (fxsra (fxlogor b1 b2) 6) #b10) (let ([n (fxlogor (fxsll (fxand b0 #b1111) 12) (fxsll (fxand b1 #b111111) 6) (fxand b2 #b111111))]) (cond [(and (fx<= #xD800 n) (fx<= n #xDFFF)) ($set-port-index! p (fx+ i 1)) (do-error p who)] [else ($set-port-index! p (fx+ i 3)) (integer->char n)]))] [else ($set-port-index! p (fx+ i 1)) (do-error p who)]))] [else (let ([bytes (refill-bv-buffer p who)]) (cond [(fx= bytes 0) ($set-port-index! p (fx+ ($port-index p) 1)) (do-error p who)] [else (get-char-utf8-mode p who)]))])] [(fx= (fxsra b0 3) #b11110) ;;; four-byte-encoding (cond [(fx< (fx+ i 3) j) (let ([b1 (bytevector-u8-ref buf (fx+ i 1))] [b2 (bytevector-u8-ref buf (fx+ i 2))] [b3 (bytevector-u8-ref buf (fx+ i 3))]) (cond [(fx= (fxsra (fxlogor b1 b2 b3) 6) #b10) (let ([n (fxlogor (fxsll (fxand b0 #b111) 18) (fxsll (fxand b1 #b111111) 12) (fxsll (fxand b2 #b111111) 6) (fxand b3 #b111111))]) (cond [(and (fx<= #x10000 n) (fx<= n #x10FFFF)) ($set-port-index! p (fx+ i 4)) (integer->char n)] [else ($set-port-index! p (fx+ i 1)) (do-error p who)]))] [else ($set-port-index! p (fx+ i 1)) (do-error p who)]))] [else (let ([bytes (refill-bv-buffer p who)]) (cond [(fx= bytes 0) ($set-port-index! p (fx+ ($port-index p) 1)) (do-error p who)] [else (get-char-utf8-mode p who)]))])] [else ($set-port-index! p (fx+ i 1)) (do-error p who)]))]))) (define (lookahead-char-utf8-mode p who) (define (do-error p who) (case (transcoder-error-handling-mode ($port-transcoder p)) [(ignore) (get-char p)] [(replace) #\xFFFD] [(raise) (raise (make-i/o-decoding-error p))] [else (die who "cannot happen")])) (let ([i ($port-index p)] [j ($port-size p)] [buf ($port-buffer p)]) (cond [(fx= i j) ;;; exhausted (let ([bytes (refill-bv-buffer p who)]) (cond [(fx= bytes 0) (eof-object)] [else (lookahead-char p)]))] [else (let ([b0 (bytevector-u8-ref buf i)]) (cond [(fx= (fxsra b0 5) #b110) ;;; two-byte-encoding (let ([i (fx+ i 1)]) (cond [(fx< i j) (let ([b1 (bytevector-u8-ref buf i)]) (cond [(fx= (fxsra b1 6) #b10) (integer->char (fxior (fxand b1 #b111111) (fxsll (fxand b0 #b11111) 6)))] [else (do-error p who)]))] [else (let ([bytes (refill-bv-buffer p who)]) (cond [(fx= bytes 0) (do-error p who)] [else (lookahead-char-utf8-mode p who)]))]))] [(fx= (fxsra b0 4) #b1110) ;;; three-byte-encoding (cond [(fx< (fx+ i 2) j) (let ([b1 (bytevector-u8-ref buf (fx+ i 1))] [b2 (bytevector-u8-ref buf (fx+ i 2))]) (cond [(fx= (fxsra (fxlogor b1 b2) 6) #b10) (let ([n (fxlogor (fxsll (fxand b0 #b1111) 12) (fxsll (fxand b1 #b111111) 6) (fxand b2 #b111111))]) (cond [(and (fx<= #xD800 n) (fx<= n #xDFFF)) (do-error p who)] [else (integer->char n)]))] [else (do-error p who)]))] [else (let ([bytes (refill-bv-buffer p who)]) (cond [(fx= bytes 0) (do-error p who)] [else (lookahead-char-utf8-mode p who)]))])] [(fx= (fxsra b0 3) #b11110) ;;; four-byte-encoding (cond [(fx< (fx+ i 3) j) (let ([b1 (bytevector-u8-ref buf (fx+ i 1))] [b2 (bytevector-u8-ref buf (fx+ i 2))] [b3 (bytevector-u8-ref buf (fx+ i 3))]) (cond [(fx= (fxsra (fxlogor b1 b2 b3) 6) #b10) (let ([n (fxlogor (fxsll (fxand b0 #b111) 18) (fxsll (fxand b1 #b111111) 12) (fxsll (fxand b2 #b111111) 6) (fxand b3 #b111111))]) (cond [(and (fx<= #x10000 n) (fx<= n #x10FFFF)) (integer->char n)] [else (do-error p who)]))] [else (do-error p who)]))] [else (let ([bytes (refill-bv-buffer p who)]) (cond [(fx= bytes 0) (do-error p who)] [else (lookahead-char-utf8-mode p who)]))])] [else (do-error p who)]))]))) ;;; (define (advance-bom p who bom-seq) ;;; return eof if port is eof, ;;; #t if a bom is present, updating the port index to ;;; point just past the bom. ;;; #f otherwise. (cond [(fx< ($port-index p) ($port-size p)) (let f ([i 0] [ls bom-seq]) (cond [(null? ls) ($set-port-index! p (fx+ ($port-index p) i)) #t] [else (let ([idx (fx+ i ($port-index p))]) (cond [(fx< idx ($port-size p)) (if (fx=? (car ls) (bytevector-u8-ref ($port-buffer p) idx)) (f (fx+ i 1) (cdr ls)) #f)] [else (let ([bytes (refill-bv-buffer p who)]) (if (fx= bytes 0) #f (f i ls)))]))]))] [else (let ([bytes (refill-bv-buffer p who)]) (if (fx= bytes 0) (eof-object) (advance-bom p who bom-seq)))])) ;;; (define (speedup-input-port p who) ;;; returns #t if port is eof, #f otherwise (unless (input-port? p) (die who "not an input port" p)) (let ([tr ($port-transcoder p)]) (unless tr (die who "not a textual port" p)) (case (transcoder-codec tr) [(utf-8-codec) ;;; ($set-port-attrs! p (fxior textual-input-port-bits fast-u7-text-tag)) (eof-object? (advance-bom p who '(#xEF #xBB #xBF)))] [else (die 'slow-get-char "codec not handled")]))) ;;; (define (lookahead-char-char-mode p who) (let ([str ($port-buffer p)] [read! ($port-read! p)]) (let ([n (read! str 0 (string-length str))]) (unless (fixnum? n) (die who "invalid return value from read!" n)) (unless (<= 0 n (string-length str)) (die who "return value from read! is out of range" n)) ($set-port-index! p 0) ($set-port-size! p n) (cond [(fx= n 0) (eof-object)] [else (string-ref str 0)])))) ;;; (define (lookahead-char p) (define who 'lookahead-char) (let ([m ($port-fast-attrs p)]) (cond [(eq? m fast-get-utf8-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) (let ([b (bytevector-u8-ref ($port-buffer p) i)]) (cond [(fx< b 128) (integer->char b)] [else (lookahead-char-utf8-mode p who)]))] [else (lookahead-char-utf8-mode p who)]))] [(eq? m fast-get-char-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) (string-ref ($port-buffer p) i)] [else (lookahead-char-char-mode p who)]))] [(eq? m fast-get-latin-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) (integer->char (bytevector-u8-ref ($port-buffer p) i))] [else (get-char-latin-mode p who 0)]))] [else (if (speedup-input-port p who) (eof-object) (lookahead-char p))]))) ;;; (define (get-char-char-mode p who) (let ([str ($port-buffer p)] [read! ($port-read! p)]) (let ([n (read! str 0 (string-length str))]) (unless (fixnum? n) (die who "invalid return value from read!" n)) (unless (<= 0 n (string-length str)) (die who "return value from read! is out of range" n)) ($set-port-size! p n) (cond [(fx= n 0) ($set-port-index! p 0) (eof-object)] [else ($set-port-index! p 1) (string-ref str 0)])))) (define read-char (case-lambda [(p) (define who 'read-char) (let ([m ($port-fast-attrs p)]) (cond [(eq? m fast-get-utf8-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) (let ([b (bytevector-u8-ref ($port-buffer p) i)]) (cond [(fx< b 128) ($set-port-index! p (fx+ i 1)) (integer->char b)] [else (get-char-utf8-mode p who)]))] [else (get-char-utf8-mode p who)]))] [(eq? m fast-get-char-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) ($set-port-index! p (fx+ i 1)) (string-ref ($port-buffer p) i)] [else (get-char-char-mode p who)]))] [(eq? m fast-get-latin-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) ($set-port-index! p (fx+ i 1)) (integer->char (bytevector-u8-ref ($port-buffer p) i))] [else (get-char-latin-mode p who 1)]))] [else (if (speedup-input-port p who) (eof-object) (get-char p))]))] [() (read-char (current-input-port))])) (define (get-char p) (define who 'get-char) (let ([m ($port-fast-attrs p)]) (cond [(eq? m fast-get-utf8-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) (let ([b (bytevector-u8-ref ($port-buffer p) i)]) (cond [(fx< b 128) ($set-port-index! p (fx+ i 1)) (integer->char b)] [else (get-char-utf8-mode p who)]))] [else (get-char-utf8-mode p who)]))] [(eq? m fast-get-char-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) ($set-port-index! p (fx+ i 1)) (string-ref ($port-buffer p) i)] [else (get-char-char-mode p who)]))] [(eq? m fast-get-latin-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) ($set-port-index! p (fx+ i 1)) (integer->char (bytevector-u8-ref ($port-buffer p) i))] [else (get-char-latin-mode p who 1)]))] [else (if (speedup-input-port p who) (eof-object) (get-char p))])))) ;;; ---------------------------------------------------------- (define (assert-binary-input-port p who) (unless (port? p) (die who "not a port" p)) (when ($port-closed? p) (die who "port is closed" p)) (when ($port-transcoder p) (die who "port is not binary" p)) (unless ($port-read! p) (die who "port is not an input port" p))) (module (get-u8 lookahead-u8) (import UNSAFE) (define (get-u8-byte-mode p who start) (when ($port-closed? p) (die who "port is closed" p)) (let* ([bv ($port-buffer p)] [n (bytevector-length bv)]) (let ([j (($port-read! p) bv 0 n)]) (unless (fixnum? j) (die who "invalid return value from read! procedure" j)) (cond [(fx> j 0) (unless (fx<= j n) (die who "read! returned a value out of range" j)) ($set-port-index! p start) ($set-port-size! p j) (bytevector-u8-ref bv 0)] [(fx= j 0) (eof-object)] [else (die who "read! returned a value out of range" j)])))) (define (slow-get-u8 p who start) (assert-binary-input-port p who) ($set-port-attrs! p fast-get-byte-tag) (get-u8-byte-mode p who start)) ;;; (define (get-u8 p) (define who 'get-u8) (let ([m ($port-fast-attrs p)]) (cond [(eq? m fast-get-byte-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) ($set-port-index! p (fx+ i 1)) (bytevector-u8-ref ($port-buffer p) i)] [else (get-u8-byte-mode p who 1)]))] [else (slow-get-u8 p who 1)]))) (define (lookahead-u8 p) (define who 'lookahead-u8) (let ([m ($port-fast-attrs p)]) (cond [(eq? m fast-get-byte-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) (bytevector-u8-ref ($port-buffer p) i)] [else (get-u8-byte-mode p who 0)]))] [else (slow-get-u8 p who 0)])))) (define (port-eof? p) (import UNSAFE) (define who 'port-eof?) (let ([m ($port-fast-attrs p)]) (cond [(not (eq? m 0)) (if (fx< ($port-index p) ($port-size p)) #f (if ($port-transcoder p) (eof-object? (lookahead-char p)) (eof-object? (lookahead-u8 p))))] [(input-port? p) (when ($port-closed? p) (die 'port-eof? "port is closed" p)) (if (textual-port? p) (eof-object? (lookahead-char p)) (eof-object? (lookahead-u8 p)))] [else (die 'port-eof? "not an input port" p)]))) (define io-errors-vec '#(#| 0 |# "unknown error" #| 1 |# "bad file name" #| 2 |# "operation interrupted" #| 3 |# "not a directory" #| 4 |# "file name too long" #| 5 |# "missing entities" #| 6 |# "insufficient access privileges" #| 7 |# "circular path" #| 8 |# "file is a directory" #| 9 |# "file system is read-only" #| 10 |# "maximum open files reached" #| 11 |# "maximum open files reached" #| 12 |# "ENXIO" #| 13 |# "operation not supported" #| 14 |# "not enough space on device" #| 15 |# "quota exceeded" #| 16 |# "io error" #| 17 |# "device is busy" #| 18 |# "access fault" #| 19 |# "file already exists" #| 20 |# "invalid file name")) (define (io-error who id err) (let ([err (fxnot err)]) (let ([msg (cond [(fx< err (vector-length io-errors-vec)) (vector-ref io-errors-vec err)] [else "unknown error"])]) (raise (condition (make-who-condition who) (case err [(6 9 18) (make-i/o-file-protection-error)] [(19) (make-i/o-file-already-exists-error id)] [else (condition)]) (make-message-condition msg) (make-i/o-filename-error id)))))) (define block-size 4096) (define input-file-buffer-size (+ block-size 128)) (define output-file-buffer-size block-size) (define (fh->input-port fd id size transcoder close?) (guarded-port ($make-port (input-transcoder-attrs transcoder) 0 0 (make-bytevector size) transcoder id (lambda (bv idx cnt) (let ([bytes (foreign-call "ikrt_read_fd" fd bv idx (fxmin block-size cnt))]) (when (fx< bytes 0) (io-error 'read id bytes)) bytes)) #f ;;; write! #f ;;; get-position #f ;;; set-position! (and close? (lambda () (cond [(foreign-call "ikrt_close_fd" fd) => (lambda (err) (io-error 'close id err))]))) fd))) (define (fh->output-port fd id size transcoder close?) (guarded-port ($make-port (output-transcoder-attrs transcoder) 0 size (make-bytevector size) transcoder id #f (lambda (bv idx cnt) (let ([bytes (foreign-call "ikrt_write_fd" fd bv idx (fxmin block-size cnt))]) (when (fx< bytes 0) (io-error 'write id bytes)) bytes)) #f ;;; get-position #f ;;; set-position! (and close? (lambda () (cond [(foreign-call "ikrt_close_fd" fd) => (lambda (err) (io-error 'close id err))]))) fd))) (define (open-input-file-handle filename who) (let ([fh (foreign-call "ikrt_open_input_fd" (string->utf8 filename))]) (cond [(fx< fh 0) (io-error who filename fh)] [else fh]))) (define (open-output-file-handle filename file-options who) (let ([opt (case file-options [(fo:default) 0] [(fo:no-create) 1] [(fo:no-fail) 2] [(fo:no-fail/no-create) 3] [(fo:no-truncate) 4] [(fo:no-truncate/no-create) 5] [(fo:no-truncate/no-fail) 6] [(fo:no-truncate/no-fail/no-create) 7] [else (die who "invalid file option" file-options)])]) (let ([fh (foreign-call "ikrt_open_output_fd" (string->utf8 filename) opt)]) (cond [(fx< fh 0) (io-error who filename fh)] [else fh])))) (define open-file-input-port (case-lambda [(filename) (open-file-input-port filename (file-options) 'block #f)] [(filename file-options) (open-file-input-port filename file-options 'block #f)] [(filename file-options buffer-mode) (open-file-input-port filename file-options buffer-mode #f)] [(filename file-options buffer-mode transcoder) (unless (string? filename) (die 'open-file-input-port "invalid filename" filename)) (unless (or (not transcoder) (transcoder? transcoder)) (die 'open-file-input-port "invalid transcoder" transcoder)) ; FIXME: file-options ignored ; FIXME: buffer-mode ignored (fh->input-port (open-input-file-handle filename 'open-file-input-port) filename input-file-buffer-size transcoder #t)])) (define open-file-output-port (case-lambda [(filename) (open-file-output-port filename (file-options) 'block #f)] [(filename file-options) (open-file-output-port filename file-options 'block #f)] [(filename file-options buffer-mode) (open-file-output-port filename file-options buffer-mode #f)] [(filename file-options buffer-mode transcoder) (unless (string? filename) (die 'open-file-output-port "invalid filename" filename)) ; FIXME: file-options ignored ; FIXME: buffer-mode ignored (unless (or (not transcoder) (transcoder? transcoder)) (die 'open-file-output-port "invalid transcoder" transcoder)) (fh->output-port (open-output-file-handle filename file-options 'open-file-output-port) filename output-file-buffer-size transcoder #t)])) (define (open-output-file filename) (unless (string? filename) (die 'open-output-file "invalid filename" filename)) (fh->output-port (open-output-file-handle filename (file-options) 'open-output-file) filename output-file-buffer-size (native-transcoder) #t)) (define (open-input-file filename) (unless (string? filename) (die 'open-input-file "invalid filename" filename)) (fh->input-port (open-input-file-handle filename 'open-input-file) filename input-file-buffer-size (native-transcoder) #t)) (define (with-output-to-file filename proc) (unless (string? filename) (die 'with-output-to-file "invalid filename" filename)) (unless (procedure? proc) (die 'with-output-to-file "not a procedure" proc)) (call-with-port (fh->output-port (open-output-file-handle filename (file-options) 'with-output-to-file) filename output-file-buffer-size (native-transcoder) #t) (lambda (p) (parameterize ([*the-output-port* p]) (proc))))) (define (call-with-output-file filename proc) (unless (string? filename) (die 'call-with-output-file "invalid filename" filename)) (unless (procedure? proc) (die 'call-with-output-file "not a procedure" proc)) (call-with-port (fh->output-port (open-output-file-handle filename (file-options) 'call-with-output-file) filename output-file-buffer-size (native-transcoder) #t) proc)) (define (call-with-input-file filename proc) (unless (string? filename) (die 'call-with-input-file "invalid filename" filename)) (unless (procedure? proc) (die 'call-with-input-file "not a procedure" proc)) (call-with-port (fh->input-port (open-input-file-handle filename 'call-with-input-file) filename input-file-buffer-size (native-transcoder) #t) proc)) (define (with-input-from-file filename proc) (unless (string? filename) (die 'with-input-from-file "invalid filename" filename)) (unless (procedure? proc) (die 'with-input-from-file "not a procedure" proc)) (call-with-port (fh->input-port (open-input-file-handle filename 'with-input-from-file) filename input-file-buffer-size (native-transcoder) #t) (lambda (p) (parameterize ([*the-input-port* p]) (proc))))) (define (with-input-from-string string proc) (unless (string? string) (die 'with-input-from-string "not a string" string)) (unless (procedure? proc) (die 'with-input-from-string "not a procedure" proc)) (parameterize ([*the-input-port* (open-string-input-port string)]) (proc))) (define (standard-input-port) (fh->input-port 0 '*stdin* 256 #f #f)) (define (standard-output-port) (fh->output-port 1 '*stdout* 256 #f #f)) (define (standard-error-port) (fh->output-port 2 '*stderr* 256 #f #f)) (define *the-input-port* (make-parameter (transcoded-port (fh->input-port 0 '*stdin* input-file-buffer-size #f #f) (native-transcoder)))) (define *the-output-port* (make-parameter (transcoded-port (fh->output-port 1 '*stdout* output-file-buffer-size #f #f) (native-transcoder)))) (define *the-error-port* (make-parameter (transcoded-port (fh->output-port 2 '*stderr* output-file-buffer-size #f #f) (native-transcoder)))) (define console-output-port (let ([p (*the-output-port*)]) (lambda () p))) (define console-error-port (let ([p (*the-error-port*)]) (lambda () p))) (define console-input-port (let ([p (*the-input-port*)]) (lambda () p))) (define (current-input-port) (*the-input-port*)) (define (current-output-port) (*the-output-port*)) (define (current-error-port) (*the-error-port*)) (define (call-with-port p proc) (if (port? p) (if (procedure? proc) (dynamic-wind void (lambda () (proc p)) (lambda () (close-port p))) (die 'call-with-port "not a procedure" proc)) (die 'call-with-port "not a port" p))) ;;; (define peek-char (case-lambda [() (lookahead-char (*the-input-port*))] [(p) (if (input-port? p) (if (textual-port? p) (lookahead-char p) (die 'peek-char "not a textual port" p)) (die 'peek-char "not an input-port" p))])) (define (get-bytevector-n p n) (import (ikarus system $fx) (ikarus system $bytevectors)) (define (subbytevector s n) (let ([p ($make-bytevector n)]) (let f ([s s] [n n] [p p]) (let ([n ($fx- n 1)]) ($bytevector-set! p n ($bytevector-u8-ref s n)) (if ($fx= n 0) p (f s n p)))))) (unless (input-port? p) (die 'get-bytevector-n "not an input port" p)) (unless (binary-port? p) (die 'get-bytevector-n "not a binary port" p)) (unless (fixnum? n) (die 'get-bytevector-n "count is not a fixnum" n)) (cond [($fx> n 0) (let ([s ($make-bytevector n)]) (let f ([p p] [n n] [s s] [i 0]) (let ([x (get-u8 p)]) (cond [(eof-object? x) (if ($fx= i 0) (eof-object) (subbytevector s i))] [else ($bytevector-set! s i x) (let ([i ($fxadd1 i)]) (if ($fx= i n) s (f p n s i)))]))))] [($fx= n 0) '#vu8()] [else (die 'get-bytevector-n "count is negative" n)])) (define (get-bytevector-n! p s i c) (import (ikarus system $fx) (ikarus system $bytevectors)) (unless (input-port? p) (die 'get-bytevector-n! "not an input port" p)) (unless (binary-port? p) (die 'get-bytevector-n! "not a binary port" p)) (unless (bytevector? s) (die 'get-bytevector-n! "not a bytevector" s)) (let ([len ($bytevector-length s)]) (unless (fixnum? i) (die 'get-bytevector-n! "starting index is not a fixnum" i)) (when (or ($fx< i 0) ($fx> i len)) (die 'get-bytevector-n! (format "starting index is out of range 0..~a" len) i)) (unless (fixnum? c) (die 'get-bytevector-n! "count is not a fixnum" c)) (cond [($fx> c 0) (let ([j (+ i c)]) (when (> j len) (die 'get-bytevector-n! (format "count is out of range 0..~a" (- len i)) c)) (let ([x (get-u8 p)]) (cond [(eof-object? x) x] [else ($bytevector-set! s i x) (let f ([p p] [s s] [start i] [i 1] [c c]) (let ([x (get-u8 p)]) (cond [(eof-object? x) i] [else ($bytevector-set! s ($fx+ start i) x) (let ([i ($fxadd1 i)]) (if ($fx= i c) i (f p s start i c)))])))])))] [($fx= c 0) 0] [else (die 'get-bytevector-n! "count is negative" c)]))) (define-rrr get-bytevector-some) (define (get-bytevector-all p) (define (get-it p) (let f ([p p] [n 0] [ac '()]) (let ([x (get-u8 p)]) (cond [(eof-object? x) (if (null? ac) (eof-object) (make-it n ac))] [else (f p (+ n 1) (cons x ac))])))) (define (make-it n revls) (let f ([s (make-bytevector n)] [i (- n 1)] [ls revls]) (cond [(pair? ls) (bytevector-u8-set! s i (car ls)) (f s (- i 1) (cdr ls))] [else s]))) (if (input-port? p) (if (binary-port? p) (get-it p) (die 'get-bytevector-all "not a binary port" p)) (die 'get-bytevector-all "not an input port" p))) (define (get-string-n p n) (import (ikarus system $fx) (ikarus system $strings)) (unless (input-port? p) (die 'get-string-n "not an input port" p)) (unless (textual-port? p) (die 'get-string-n "not a textual port" p)) (unless (fixnum? n) (die 'get-string-n "count is not a fixnum" n)) (cond [($fx> n 0) (let ([s ($make-string n)]) (let f ([p p] [n n] [s s] [i 0]) (let ([x (get-char p)]) (cond [(eof-object? x) (if ($fx= i 0) (eof-object) (substring s 0 i))] [else ($string-set! s i x) (let ([i ($fxadd1 i)]) (if ($fx= i n) s (f p n s i)))]))))] [($fx= n 0) ""] [else (die 'get-string-n "count is negative" n)])) (define (get-string-n! p s i c) (import (ikarus system $fx) (ikarus system $strings)) (unless (input-port? p) (die 'get-string-n! "not an input port" p)) (unless (textual-port? p) (die 'get-string-n! "not a textual port" p)) (unless (string? s) (die 'get-string-n! "not a string" s)) (let ([len ($string-length s)]) (unless (fixnum? i) (die 'get-string-n! "starting index is not a fixnum" i)) (when (or ($fx< i 0) ($fx> i len)) (die 'get-string-n! (format "starting index is out of range 0..~a" len) i)) (unless (fixnum? c) (die 'get-string-n! "count is not a fixnum" c)) (cond [($fx> c 0) (let ([j (+ i c)]) (when (> j len) (die 'get-string-n! (format "count is out of range 0..~a" (- len i)) c)) (let ([x (get-char p)]) (cond [(eof-object? x) x] [else ($string-set! s i x) (let f ([p p] [s s] [start i] [i 1] [c c]) (let ([x (get-char p)]) (cond [(eof-object? x) i] [else ($string-set! s ($fx+ start i) x) (let ([i ($fxadd1 i)]) (if ($fx= i c) i (f p s start i c)))])))])))] [($fx= c 0) 0] [else (die 'get-string-n! "count is negative" c)]))) (define (get-line p) (import UNSAFE) (define (get-it p) (let f ([p p] [n 0] [ac '()]) (let ([x (get-char p)]) (cond [(eqv? x #\newline) (make-it n ac)] [(eof-object? x) (if (null? ac) x (make-it n ac))] [else (f p (fx+ n 1) (cons x ac))])))) (define (make-it n revls) (let f ([s (make-string n)] [i (fx- n 1)] [ls revls]) (cond [(pair? ls) (string-set! s i (car ls)) (f s (fx- i 1) (cdr ls))] [else s]))) (if (input-port? p) (if (textual-port? p) (get-it p) (die 'get-line "not a textual port" p)) (die 'get-line "not an input port" p))) (define (get-string-all p) (define (get-it p) (let f ([p p] [n 0] [ac '()]) (let ([x (get-char p)]) (cond [(eof-object? x) (if (null? ac) (eof-object) (make-it n ac))] [else (f p (+ n 1) (cons x ac))])))) (define (make-it n revls) (let f ([s (make-string n)] [i (- n 1)] [ls revls]) (cond [(pair? ls) (string-set! s i (car ls)) (f s (- i 1) (cdr ls))] [else s]))) (if (input-port? p) (if (textual-port? p) (get-it p) (die 'get-string-all "not a textual port" p)) (die 'get-string-all "not an input port" p))) ;;; ---------------------------------------------------------- (module (put-char write-char put-string) (import UNSAFE) (define (put-char-utf8-mode p b who) (cond [(fx< b 128) (flush-output-port p) (let ([i ($port-index p)] [j ($port-size p)]) (cond [(fx< i j) (bytevector-u8-set! ($port-buffer p) i b) ($set-port-index! p (fx+ i 1))] [else (die who "insufficient space on port" p)]))] [(fx<= b #x7FF) (let ([i ($port-index p)] [j ($port-size p)] [buf ($port-buffer p)]) (cond [(fx< (fx+ i 1) j) (bytevector-u8-set! buf i (fxior #b11000000 (fxsra b 6))) (bytevector-u8-set! buf (fx+ i 1) (fxior #b10000000 (fxand b #b111111))) ($set-port-index! p (fx+ i 2))] [else (flush-output-port p) (put-char-utf8-mode p b who)]))] [(fx<= b #xFFFF) (let ([i ($port-index p)] [j ($port-size p)] [buf ($port-buffer p)]) (cond [(fx< (fx+ i 2) j) (bytevector-u8-set! buf i (fxior #b11100000 (fxsra b 12))) (bytevector-u8-set! buf (fx+ i 1) (fxior #b10000000 (fxand (fxsra b 6) #b111111))) (bytevector-u8-set! buf (fx+ i 2) (fxior #b10000000 (fxand b #b111111))) ($set-port-index! p (fx+ i 3))] [else (flush-output-port p) (put-char-utf8-mode p b who)]))] [else (let ([i ($port-index p)] [j ($port-size p)] [buf ($port-buffer p)]) (cond [(fx< (fx+ i 3) j) (bytevector-u8-set! buf i (fxior #b11110000 (fxsra b 18))) (bytevector-u8-set! buf (fx+ i 1) (fxior #b10000000 (fxand (fxsra b 12) #b111111))) (bytevector-u8-set! buf (fx+ i 2) (fxior #b10000000 (fxand (fxsra b 6) #b111111))) (bytevector-u8-set! buf (fx+ i 3) (fxior #b10000000 (fxand b #b111111))) ($set-port-index! p (fx+ i 4))] [else (flush-output-port p) (put-char-utf8-mode p b who)]))])) (define (put-char-latin-mode p b who) (cond [(fx< b 256) (flush-output-port p) (let ([i ($port-index p)] [j ($port-size p)]) (cond [(fx< i j) (bytevector-u8-set! ($port-buffer p) i b) ($set-port-index! p (fx+ i 1))] [else (die who "insufficient space in port" p)]))] [else (case (transcoder-error-handling-mode (port-transcoder p)) [(ignore) (void)] [(replace) (put-char p #\?)] [(raise) (raise (make-i/o-encoding-error p))] [else (die who "BUG: invalid die handling mode" p)])])) (define (put-char-char-mode p c who) (flush-output-port p) (let ([i ($port-index p)] [j ($port-size p)]) (cond [(fx< i j) (string-set! ($port-buffer p) i c) ($set-port-index! p (fx+ i 1))] [else (die who "insufficient space in port" p)]))) ;;; (define write-char (case-lambda [(c p) (do-put-char p c 'write-char)] [(c) (do-put-char (*the-output-port*) c 'write-char)])) (define (put-char p c) (do-put-char p c 'put-char)) (define (put-string p str) (unless (string? str) (die 'put-string "not a string" str)) (unless (output-port? p) (die 'put-string "not an output port" p)) (unless (textual-port? p) (die 'put-string "not a textual port" p)) (let f ([i 0] [n (string-length str)]) (unless (fx= i n) (do-put-char p (string-ref str i) 'put-string) (f (fx+ i 1) n)))) (define (do-put-char p c who) (unless (char? c) (die who "not a char" c)) (let ([m ($port-fast-attrs p)]) (cond [(eq? m fast-put-utf8-tag) (let ([i ($port-index p)]) (let ([b (char->integer c)]) (cond [(and (fx< i ($port-size p)) (fx< b 128)) (bytevector-u8-set! ($port-buffer p) i b) ($set-port-index! p (fx+ i 1))] [else (put-char-utf8-mode p b who)])))] [(eq? m fast-put-char-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) ($set-port-index! p (fx+ i 1)) (string-set! ($port-buffer p) i c)] [else (put-char-char-mode p c who)]))] [(eq? m fast-put-latin-tag) (let ([i ($port-index p)]) (let ([b (char->integer c)]) (cond [(and (fx< i ($port-size p)) (fx< b 256)) (bytevector-u8-set! ($port-buffer p) i b) ($set-port-index! p (fx+ i 1))] [else (put-char-latin-mode p b who)])))] [else (if (output-port? p) (die who "not a textual port" p) (die who "not an output port" p))])))) (define newline (case-lambda [() (put-char (*the-output-port*) #\newline) (flush-output-port (*the-output-port*))] [(p) (unless (output-port? p) (die 'newline "not an output port" p)) (unless (textual-port? p) (die 'newline "not a textual port" p)) (when ($port-closed? p) (die 'newline "port is closed" p)) (put-char p #\newline) (flush-output-port p)])) (module (put-u8) (import UNSAFE) (define (put-u8-byte-mode p b who) (let ([write! ($port-write! p)]) (let ([i ($port-index p)] [buf ($port-buffer p)]) (let ([bytes (write! buf 0 i)]) (when (or (not (fixnum? bytes)) (fx< bytes 0) (fx> bytes i)) (die who "write! returned an invalid value" bytes)) (cond [(fx= bytes i) (bytevector-u8-set! buf 0 b) ($set-port-index! p 1)] [(fx= bytes 0) (die who "could not write bytes to sink")] [else (let ([i (fx- i bytes)]) (bytevector-copy! buf bytes buf 0 i) (bytevector-u8-set! buf i b) ($set-port-index! p (fx+ i 1)))]))))) ;;; (define (put-u8 p b) (define who 'put-u8) (unless (u8? b) (die who "not a u8" b)) (let ([m ($port-fast-attrs p)]) (cond [(eq? m fast-put-byte-tag) (let ([i ($port-index p)]) (cond [(fx< i ($port-size p)) ($set-port-index! p (fx+ i 1)) (bytevector-u8-set! ($port-buffer p) i b)] [else (put-u8-byte-mode p b who)]))] [else (if (output-port? p) (die who "not a binary port" p) (die who "not an output port" p))])))) (define (process cmd . args) (define who 'process) (unless (string? cmd) (die who "command is not a string" cmd)) (unless (andmap string? args) (die who "all arguments must be strings")) (let ([r (foreign-call "ikrt_process" (make-vector 4) (string->utf8 cmd) (map string->utf8 (cons cmd args)))]) (if (fixnum? r) (io-error who cmd r) (values (vector-ref r 0) ; pid (fh->output-port (vector-ref r 1) cmd output-file-buffer-size #f #t) (fh->input-port (vector-ref r 2) cmd input-file-buffer-size #f #t) (fh->input-port (vector-ref r 3) cmd input-file-buffer-size #f #t))))) )