callprocess.pro

Visual Prolog 7.1的一些学习资料,希望对您有用

/*****************************************************************************

                        Copyright (c) Prolog Development Center A/S

******************************************************************************/

implement callProcess
    open core

constants
    className = "callProcess".
    classVersion = "".

clauses
    classInfo(className, classVersion).

clauses
    run():-
        console::init(),
        UseExe = useExe::new("comp.exe"),
        Input = UseExe:getFromProcessStream(stream::ansi(ansi())),
        Output = UseExe:getToProcessStream(stream::ansi(ansi())),
        UseExe:run(),
        echo(Input),
        stdIO::write("\n"),
        Output:write("FirstFile.txt\r\n"),
        Output:flush(),
        echo(Input),
        stdIO::write("\n"),
        Output:write("SecondFile.txt\r\n"),
        Output:flush(),
        echo(Input),
        stdIO::write("\n"),
        Output:write("\r\n"),
        Output:flush(),
        echo(Input),
        stdIO::write("\n"),
        Output:write("N\r\n"),
        Output:flush(),
        echo(Input),
        UseExe:close(),
        stdIO::write("Good bye\n").

class predicates
    echo : (inputStream).
clauses
    echo(Input) :-
        waitForInput(Input),
        outUntilEos(Input).

class predicates
    waitForInput : (inputStream).
clauses
    waitForInput(Input) :-
        Input:endOfStream(),
        !,
        programControl::sleep(shortDelayInMs),
        waitForInput(Input).
    waitForInput(_Input).

class predicates
    outUntilEos : (inputStream).
clauses
    outUntilEos(Input):-
        Input:endOfStream(),
        !.
    outUntilEos(Input):-
        stdIO::write(Input:readChar()),
        outUntilEos(Input).

constants
    shortDelayInMs = 10.
end implement callProcess

goal
    mainExe::run(callProcess::run).