1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 2001 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #include <string.h>
28
29 #include "options.h"
30
31 static uchar_t bitlocation[8] = {1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80};
32
33 /*
34 * Create a bytemask to store the command line options.
35 */
36 void
set_options_mask(options * msk,char * str)37 set_options_mask(options *msk, char *str)
38 {
39 int i;
40 (void) memset(msk, 0, sizeof (*msk));
41 for (i = 0; str[i] != 0; i++) {
42 add_option(msk, str[i]);
43 }
44 }
45
46 void
add_option(options * msk,char option)47 add_option(options *msk, char option)
48 {
49 uint_t loc;
50 loc = (uint_t)option;
51 loc &= 0x7f;
52 /* put option into the correct bucket */
53 msk->bitmap[loc >> 3] |= bitlocation[loc & 7];
54 }
55
56 /*
57 * Compare the bytemask of the command line options used with
58 * acceptable options. If an invalid option is found use it as
59 * the return value.
60 */
61 int
compare_options_mask(options * msk,options * specified)62 compare_options_mask(options *msk, options *specified)
63 {
64 int i, j;
65 uchar_t bmap = 0;
66
67 for (i = 0; i < 16; i++) {
68 if (msk->bitmap[i] == specified->bitmap[i])
69 continue;
70 bmap = msk->bitmap[i] | specified->bitmap[i];
71 bmap ^= msk->bitmap[i];
72 if (bmap)
73 break;
74 }
75 if (i == 16) {
76 /* no invalid options found */
77 return (0);
78 }
79
80 for (j = 0; j < 8; j++) {
81 if (bmap & bitlocation[j])
82 break;
83 }
84 return ((i*8) + j);
85 }
86