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

     jusleep.c
     micro sleep implementation
     written by Jose Mari Reyes
     
     The function will wait up to the number of seconds or 
     microseconds, you can override the sleeping process by
     hitting the enter key on line buffered terminal.

     returns -1 if override or 0 if complete

     param: seconds, micro seconds , 0 - override off 
                                     1 - override on
 
     (C)1998 by Jose Mari Reyes
      written this 12/20/1998  

     Contact at:
     web: www.angelfire.com/co2/xtechnica
     email: jet_reyes@jetemail.net
            wufei_ph@yahoo.com  

********************************************************************/
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>

#define   STDIN  0 

 extern int jusleep(int seconds, int u_seconds, int override)
  {
    struct timeval tv;
    fd_set fds;

    tv.tv_sec = seconds;
    tv.tv_usec = u_seconds;
    
    FD_ZERO (&fds);
    FD_SET (STDIN, &fds);

    if (override == 0)
        select(STDIN , &fds, NULL, NULL, &tv);
    else if (override == 1)
        select(STDIN + 1, &fds, NULL, NULL, &tv);

   if (FD_ISSET(STDIN, &fds))
        return -1;
    else
        return 0;
  }