140 lines
4.2 KiB
Factor
140 lines
4.2 KiB
Factor
! :folding=indent:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2004 Slava Pestov.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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IN: inferior
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USE: combinators
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USE: errors
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USE: interpreter
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USE: kernel
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USE: lists
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USE: logic
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USE: namespaces
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USE: parser
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USE: prettyprint
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USE: stack
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USE: stdio
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USE: streams
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USE: strings
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USE: styles
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! Packets have the following form:
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! 1 byte -- type. CHAR: w: write, CHAR: r: read
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! 4 bytes -- for write only -- length of write request
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! remaining -- unparsed write request -- string then style
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! After a read line request, the server reads a response from
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! the client:
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! 4 bytes -- length. -1 means EOF
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! remaining -- input
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! All multi-byte integers are big endian signed.
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: inferior-server-read ( -- str )
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CHAR: r write flush read-big-endian-32 read# ;
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: inferior-server-write-attr ( str style -- )
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CHAR: w write
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[ swap . . ] with-string
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dup str-length write-big-endian-32
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write ;
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: inferior-server-flush ( -- )
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CHAR: f write flush ;
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: <inferior-server-stream> ( stream -- stream )
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<extend-stream> [
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( -- str )
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[ inferior-server-read ] "freadln" set
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( str -- )
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[
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default-style inferior-server-write-attr
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] "fwrite" set
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( str style -- )
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[ inferior-server-write-attr ] "fwrite-attr" set
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( string -- )
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[
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"\n" cat2 default-style inferior-server-write-attr
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] "fprint" set
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( -- )
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[ inferior-server-flush ] "fflush" set
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] extend ;
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: inferior-client-read ( stream -- ? )
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freadln dup [
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dup str-length write-big-endian-32 write flush t
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] [
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drop 0 write-big-endian-32 flush f
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] ifte ;
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: inferior-client-write ( stream -- ? )
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read-big-endian-32 read# dup [
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parse dup [
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uncons car rot fwrite-attr t
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] [
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2drop f
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] ifte
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] when ;
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: inferior-client-packet ( stream -- ? )
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#! Read from an inferior client socket and print attributed
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#! strings that were read to standard output.
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read1 [
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[ not ] [ 2drop f ( EOF ) ]
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[ CHAR: r = ] [ drop inferior-client-read ]
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[ CHAR: w = ] [ drop inferior-client-write ]
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[ CHAR: f = ] [ drop fflush t ]
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[ drop t ] [ "Invalid packet type: " swap cat2 throw ]
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] cond ;
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: inferior-client-loop ( stream -- )
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#! The stream is the stream to write to.
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dup inferior-client-packet [
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inferior-client-loop
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] [
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drop
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] ifte ;
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: inferior-server ( -- )
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#! Execute this in the inferior Factor.
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terpri
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"inferior-ack" print flush
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"stdio" get <inferior-server-stream> "stdio" set ;
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: inferior-read-ack ( -- )
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read [
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"inferior-ack" = [ inferior-read-ack ] unless
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] when* ;
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: inferior-client ( from -- )
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#! Execute this in the superior Factor, with a socket to
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#! the inferior Factor as a parameter.
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"stdio" get swap [
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"USE: inferior inferior-server" print flush
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inferior-read-ack
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inferior-client-loop
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] with-stream ;
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