//
// slowcat -- time delayed file copy.
//
// - Line-by-line filter with settable delay between line bursts.
// - This is useful for testing tools that read live data logs.
//
// 02-Jun-2010 Tom Van Baak (tvb) www.LeapSecond.com/tools
//

#include <stdio.h>
#include <stdlib.h>

void main (int argc, char *argv[])
{
    char line[1000];
    double seconds;
    long burst, n = 0;

    seconds = (argc > 1) ? atof(argv[1]) : 0.0;
    fprintf(stderr, "** %.3lf seconds delay between bursts\n", seconds);
    burst = (argc > 2) ? atol(argv[2]) : 1;
    fprintf(stderr, "** %ld lines per burst\n", burst);

    for (n = 0; fgets(line, sizeof line, stdin) != NULL; n += 1) {
        fputs(line, stdout);
        fflush(stdout);
        if ((n % burst) == burst - 1 && seconds > 0.0) {
            fprintf(stderr, "\r%ld\r", n + 1);
            _sleep((long)(seconds * 1000.0));
        }
    }
    fprintf(stderr, "\n");
}