/*      $NetBSD: uuidgen.c,v 1.4 2011/09/16 15:39:30 joerg Exp $        */

/*-
 * Copyright (c) 2004 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright (c) 2002 Marcel Moolenaar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__RCSID("$NetBSD: uuidgen.c,v 1.4 2011/09/16 15:39:30 joerg Exp $");

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <uuid.h>

__dead static void
usage(void)
{

        (void)fprintf(stderr, "usage: %s [-1s] [-n count] [-o filename]\n",
            getprogname());
        exit(1);
}

int
main(int argc, char *argv[])
{
        FILE *fp;
        uuid_t *store, *uuid;
        char *p;
        int ch, count, i, iterate, c_struct;

        count = -1;     /* no count yet */
        fp = stdout;    /* default output file */
        iterate = 0;    /* not one at a time */
        c_struct = 0;   /* not as a C structure */

        while ((ch = getopt(argc, argv, "1n:o:s")) != -1) {
                switch (ch) {
                case '1':
                        iterate = 1;
                        break;
                case 'n':
                        if (count > 0)
                                usage();
                        count = strtol(optarg, &p, 10);
                        if (*p != 0 || count < 1)
                                usage();
                        break;
                case 'o':
                        if (fp != stdout)
                                errx(1, "multiple output files not allowed");
                        fp = fopen(optarg, "w");
                        if (fp == NULL)
                                err(1, "fopen");
                        break;
                case 's':
                        c_struct = 1;
                        break;
                default:
                        usage();
                }
        }
        argv += optind;
        argc -= optind;

        if (argc)
                usage();

        if (count == -1)
                count = 1;

        store = (uuid_t*)malloc(sizeof(uuid_t) * count);
        if (store == NULL)
                err(1, "malloc()");

        if (!iterate) {
                /* Get them all in a single batch */
                if (uuidgen(store, count) != 0)
                        err(1, "uuidgen()");
        } else {
                uuid = store;
                for (i = 0; i < count; i++) {
                        if (uuidgen(uuid++, 1) != 0)
                                err(1, "uuidgen()");
                }
        }

        uuid = store;
        while (count--) {
                uuid_to_string(uuid++, &p, NULL);
                if (c_struct) {
                        fprintf(fp, "= { /* %s */\n", p);       /* } */
                        /*
                         * Chunk up the string for processing:
                         *
                         *      aaaaaaaa-bbbb-cccc-dddd-0123456789ab
                         *
                         * We output it like so:
                         *
                         * = { \/\* aaaaaaaa-bbbb-cccc-ddee-0123456789ab \*\/
                         *      0xaaaaaaaa,
                         *      0xbbbb,
                         *      0xcccc,
                         *      0xdd,
                         *      0xee,
                         *      { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab }
                         * };
                         */
                        p[8] = '\0';    /* aaaaaaaa */
                        p[13] = '\0';   /* bbbb */
                        p[18] = '\0';   /* cccc */
                        p[23] = '\0';   /* dddd */
                        fprintf(fp, "\t0x%s,\n", p);
                        fprintf(fp, "\t0x%s,\n", &p[9]);
                        fprintf(fp, "\t0x%s,\n", &p[14]);
                        fprintf(fp, "\t0x%c%c,\n", p[19], p[20]);
                        fprintf(fp, "\t0x%c%c,\n", p[21], p[22]);
                        fprintf(fp, "\t{ 0x%c%c, 0x%c%c, 0x%c%c, 0x%c%c, "
                                        "0x%c%c, 0x%c%c }\n",
                                p[24], p[25], p[26], p[27],
                                p[28], p[29], p[30], p[31],
                                p[32], p[33], p[34], p[35]);
        /* { */         fprintf(fp, "};\n");
                } else
                        fprintf(fp, "%s\n", p);
                free(p);
        }

        free(store);
        if (fp != stdout)
                fclose(fp);
        return (0);
}