different behaviors between Unix and Windows versions

Hi,

We are trying to write an Eclipse plugin for Eclipse dedicated to GNU prolog programming. In this context, I start GNU prolog as a separate process, writing commands to the interpreter (e.g. compilations with consult(...)), and reading the results (e.g. parsing error messages). I'm working on Windows, so I set the LINEDIT environment variable to "gui=no".

It works for simple commands. But under Windows, there is a difference in the behavior of gprolog between an interactive command-line and a non-interactive process: when there is multiple answers, I get an endless loop with this prompt:

Action (; for next solution, a for all solutions, RET to stop) ?

while I do not send any character on the pipe.

Any hint about that problem would be welcome.

Here
is a small Java program as an illustration of my problem.

Note that the prob
lem only happens on Windows; on Solaris, it works fine
(but the "| ?-" prompt also disappears...why ?).

Thanks in advance.

--------------------------------------------------------------------------
-------------------- Java program
--------------------------------------------------------------------------
import java.io.*;
public class CallingProlog {
static InputStreamReader fromProlog;
static OutputStream toProlog;
// ----------------------------------------------------------------------
public static void main (String [] args) throws IOException{
startProlog();
while(true) {
if (fromProlog.ready()) { // something to read from gprolog process
System.out.write( (char)(f
romProlog.read()));
System.out.flush();
&
nbsp; }
if (System.in.available()>0) { // something to read from stdin
toProlog.write((char)(System.in.read()));
toProlog.flush();
}
}
}
// ----------------------------------------------------------------------
public static void startProlog() throws IOException {
String Cmd = "gprolog";
Process prcss = Runtime.getRuntime().exec(Cmd);
fromProlog = new InputStreamReader(prcss.getInputStream());
toProlog = prcss.getOutputStream();
}
}

--------------------------------------------------------------------------
-------------------- Execution
--------------------------------------------------------------------------
E:\jav
a CallingProlog
GNU Prolog 1.2.16
By Daniel Diaz
Copyright (C) 1999-2002
Daniel Diaz
append([],A,[]).

A = []

yes
append(A,B,C).

A = []
C = B ?
Action (; for next solution, a for all solutions, RET to stop) ?
Action (; for next solution, a for all solutions, RET to stop) ?
Action (; for next solution, a for all solutions, RET to stop) ?
...

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