/**

 * numerierung.c

 * Copyright (C) 2008 Markus Broeker

 */

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include <getopt.h>

void usage (char *cmd)

{

    printf ("Usage: %s [-h|-p] [<file>]\n", cmd);

    exit (0);

}

int main (int argc, char **argv)

{

    char buffer[240];

    int counter = 0;

    FILE *f;

    int c, pure = 0;

    struct option options[] = {

        {"help", 0, 0, 'h'},

        {"pure", 0, 0, 'p'},

    };

    while ((c = getopt_long_only (argc, argv, "hp", options, NULL)) != -1) {

        switch (c) {

        case 'h':

            usage (argv[0]);

            break;

        case 'p':

            pure = 1;

            break;

        default:

            printf ("Unknown Parameter: %s\n", argv[optind]);

        }

    }

    if (optind == argc)

        f = stdin;

    else

        f = fopen (argv[optind], "r");

    if (!f) {

        perror ("Error opening file");

        return EXIT_FAILURE;

    }

    *buffer = 0;

    while (fgets (buffer, sizeof (buffer), f) != NULL) {

        if (!pure)

            printf ("%4.4d: %s", counter++, buffer);

        else

            printf ("%s", buffer);

        *buffer = 0;

    }

    fclose (f);

    return EXIT_SUCCESS;

}