/*
 *  ircd-ratbox: A slightly useful ircd.
 *  getopt.c: Uses getopt to fetch the command line options.
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2002-2005 ircd-ratbox development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 */

#include "stdinc.h"

#include "ircd_getopt.h"

# define OPTCHAR '-'

void
parseargs(int *argc, char ***argv, struct lgetopt *opts)
{
    int i;
    char *progname = (*argv)[0];

    /* loop through each argument */
    for (;;) {
        int found = 0;

        (*argc)--;
        (*argv)++;

        if(*argc < 1) {
            return;
        }

        /* check if it *is* an arg.. */
        if((*argv)[0][0] != OPTCHAR) {
            return;
        }

        (*argv)[0]++;

        /* search through our argument list, and see if it matches */
        for (i = 0; opts[i].opt; i++) {
            if(!strcmp(opts[i].opt, (*argv)[0])) {
                /* found our argument */
                found = 1;

                switch (opts[i].argtype) {
                case YESNO:
                    *((int *) opts[i].argloc) = 1;
                    break;
                case INTEGER:
                    if(*argc < 2) {
                        fprintf(stderr,
                                "Error: option '%c%s' requires an argument\n",
                                OPTCHAR, opts[i].opt);
                        usage((*argv)[0]);
                    }

                    *((int *) opts[i].argloc) = atoi((*argv)[1]);

                    (*argc)--;
                    (*argv)++;
                    break;
                case STRING:
                    if(*argc < 2) {
                        fprintf(stderr,
                                "error: option '%c%s' requires an argument\n",
                                OPTCHAR, opts[i].opt);
                        usage(progname);
                    }

                    *((char **) opts[i].argloc) =
                        malloc(strlen((*argv)[1]) + 1);
                    strcpy(*((char **) opts[i].argloc), (*argv)[1]);

                    (*argc)--;
                    (*argv)++;
                    break;

                case USAGE:
                    usage(progname);
                /*NOTREACHED*/ default:
                    fprintf(stderr,
                            "Error: internal error in parseargs() at %s:%d\n",
                            __FILE__, __LINE__);
                    exit(EXIT_FAILURE);
                }
            }
        }
        if(!found) {
            fprintf(stderr, "error: unknown argument '%c%s'\n", OPTCHAR, (*argv)[0]);
            usage(progname);
        }
    }
}

void
usage(char *name)
{
    int i = 0;

    fprintf(stderr, "Usage: %s [options]\n", name);
    fprintf(stderr, "Where valid options are:\n");

    for (i = 0; myopts[i].opt; i++) {
        fprintf(stderr, "\t%c%-10s %-20s%s\n", OPTCHAR,
                myopts[i].opt, (myopts[i].argtype == YESNO
                                || myopts[i].argtype ==
                                USAGE) ? "" : myopts[i].argtype ==
                INTEGER ? "<number>" : "<string>", myopts[i].desc);
    }

    exit(EXIT_FAILURE);
}
