Subj : Input without Carriage Return (Enter)
To   : Nightfox
From : Mercyful Fate
Date : Thu Sep 17 2009 02:04 pm

  Re: Input without Carriage Return (Enter)
  By: Nightfox to Mercyful Fate on Wed Sep 16 2009 16:08:05

 > That may work in Windows, but I believe Jon Justvig is working in Linux and
 > wants his door to at least work in Linux.  For a multi-platform solution, th
 > are ways to use the appropriate function depending on which platform you're
 > using.

Indeed, although i thought it was being asked an example of both Windows and
linux.  In linux i would use read() to get stright from stdio.

This is just a quick and dirty example...  You still need to add buffering for
escape sequences etc...

# include <cstdlib>
# include <cstdarg>
# include <cstring>
# include <time.h>


char getkey() {

    fd_set   fds;
    timeval  tv;
    char     buffer[256]={0};
    int      len = 0;
    char     ch;

    while(1) {
        if (feof(stdin) || ferror(stdin))
             clearerr(stdin);

        FD_ZERO(&fds);
        FD_SET(STDIN_FILENO, &fds);
        tv.tv_sec  = 0;
        tv.tv_usec = 400000; // .4 second delay / Save CPU Usage

        if (select(STDIN_FILENO+1, &fds, 0, 0, &tv)) {
            if (FD_ISSET(STDIN_FILENO, &fds)) {
                len = read(STDIN_FILENO, buffer, sizeof(buffer)-1);

                ch = buffer[0];
                break;
            }
        }
    }
    return ch;
}

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