! Copyright (C) 2004, 2005 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
IN: io-internals
USING: errors kernel kernel-internals namespaces io strings ;

! Simple wrappers for ANSI C I/O functions, used for
! bootstrapping only.

! More elaborate platform-specific I/O code is used on Unix and
! Windows; see library/unix and library/win32.

TUPLE: c-stream in out ;

M: c-stream stream-write1
    >r ch>string r> stream-write ;

M: c-stream stream-write
    c-stream-out fwrite ;

M: c-stream stream-read1
    c-stream-in dup [ fgetc ] when ;

M: c-stream stream-flush
    c-stream-out [ fflush ] when* ;

M: c-stream stream-close
    dup c-stream-in [ fclose ] when*
    c-stream-out [ fclose ] when* ;

: <duplex-c-stream> ( in out -- stream )
    >r f <c-stream> <line-reader> f r> <c-stream> <plain-writer>
    <duplex-stream> ;

: init-io ( -- )
    13 getenv 14 getenv <duplex-c-stream> stdio set ;

: io-multiplex ( ms -- ) drop ;

IN: io

: <file-reader> ( path -- stream )
    "rb" fopen f <c-stream> <line-reader> ;

: <file-writer> ( path -- stream )
    "wb" fopen f swap <c-stream> <plain-writer> ;

TUPLE: client-stream host port ;

TUPLE: c-stream-error ;
: c-stream-error ( -- * ) <c-stream-error> throw ;

: <client> c-stream-error ;
: <server> c-stream-error ;
: accept c-stream-error ;