! Copyright (C) 2008 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors alien.c-types alien.syntax combinators io.ports
io.streams.duplex io.unix.backend system kernel math math.bitfields
vocabs.loader unix serial serial.unix.termios ;
IN: serial.unix

<< {
    { [ os linux? ] [ "serial.unix.linux" ] }
    { [ os bsd? ] [ "serial.unix.bsd" ] }
} cond require >>

FUNCTION: speed_t cfgetispeed ( termios* t ) ;
FUNCTION: speed_t cfgetospeed ( termios* t ) ;
FUNCTION: int cfsetispeed ( termios* t, speed_t s ) ;
FUNCTION: int cfsetospeed ( termios* t, speed_t s ) ;
FUNCTION: int tcgetattr ( int i1, termios* t ) ;
FUNCTION: int tcsetattr ( int i1, int i2, termios* t ) ;
FUNCTION: int tcdrain ( int i1 ) ;
FUNCTION: int tcflow ( int i1, int i2 ) ;
FUNCTION: int tcflush ( int i1, int i2 ) ;
FUNCTION: int tcsendbreak ( int i1, int i2 ) ;
FUNCTION: void cfmakeraw ( termios* t ) ;
FUNCTION: int cfsetspeed ( termios* t, speed_t s ) ;

: fd>duplex-stream ( fd -- duplex-stream )
    <fd> init-fd
    [ <input-port> ] [ <output-port> ] bi <duplex-stream> ;

: open-rw ( path -- fd ) O_RDWR file-mode open-file  ;
: <file-rw> ( path -- stream ) open-rw fd>duplex-stream ;

M: unix open-serial ( serial -- serial' )
    dup
    path>> { O_RDWR O_NOCTTY O_NDELAY } flags file-mode open-file
    fd>duplex-stream >>stream ;

: serial-fd ( serial -- fd )
    stream>> in>> handle>> fd>> ;

: get-termios ( serial -- termios )
    serial-fd
    "termios" <c-object> [ tcgetattr io-error ] keep ;

: configure-termios ( serial -- )
    dup termios>>
    {
        [ [ iflag>> ] dip over [ set-termios-iflag ] [ 2drop ] if ]
        [ [ oflag>> ] dip over [ set-termios-oflag ] [ 2drop ] if ]
        [
            [
                [ cflag>> 0 or ] [ baud>> lookup-baud ] bi bitor
            ] dip set-termios-cflag
        ]
        [ [ lflag>> ] dip over [ set-termios-lflag ] [ 2drop ] if ]
    } 2cleave ;

: tciflush ( serial -- )
    serial-fd TCIFLUSH tcflush io-error ;

: apply-termios ( serial -- )
    [ serial-fd TCSANOW ]
    [ termios>> ] bi tcsetattr io-error ;