/* seconds.c        Joe Mietus      Oct 7 2008 */

/*

seconds :

Usage: seconds [[hh]:mm]:ss | -

  Convert string in [[hh:]mm:]ss to seconds

  `-' to read stdin

*/

#include <stdio.h>

#include <stdlib.h>

main(argc, argv)

int argc;

char *argv[];

{

    char *time[12];

    long strtim();

    if (argc < 2) {

        usage(argv[0]);

    exit(1);

    }

    if (*argv[1] == '-')

        switch (argv[1][1]) {

        case '\0' : while (scanf("%s", time) == 1)

                        printf("%ld\n", strtim(time));

                exit(0);

        default : usage(argv[0]);

              exit(1);

    }

    else

        printf("%ld\n", strtim(argv[1]));

}

long strtim(buf)    /* convert string in [[hh:]mm:]ss to seconds */

char *buf;

{

    long x, y, z;

    switch (sscanf(buf, "%ld:%ld:%ld", &x, &y, &z)) {

        case 1: return (x);

        case 2: return (60*x + y);

        case 3: return (3600*x + 60*y + z);

        default: return (-1L);

    }

}

usage(prog)

char *prog;

{

    fprintf(stderr, "Usage: %s [[hh]:mm]:ss | -\n", prog);

    fprintf(stderr, " Convert string in [[hh:]mm:]ss to seconds\n");

    fprintf(stderr, " `-' to read stdin\n");

}