xref: /illumos-gate/usr/src/cmd/cdrw/options.c (revision 7c478bd9)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright (c) 2001 by Sun Microsystems, Inc.
24*7c478bd9Sstevel@tonic-gate  * All rights reserved.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*7c478bd9Sstevel@tonic-gate 
29*7c478bd9Sstevel@tonic-gate #include <string.h>
30*7c478bd9Sstevel@tonic-gate 
31*7c478bd9Sstevel@tonic-gate #include "options.h"
32*7c478bd9Sstevel@tonic-gate 
33*7c478bd9Sstevel@tonic-gate static uchar_t bitlocation[8] = {1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80};
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate /*
36*7c478bd9Sstevel@tonic-gate  * Create a bytemask to store the command line options.
37*7c478bd9Sstevel@tonic-gate  */
38*7c478bd9Sstevel@tonic-gate void
set_options_mask(options * msk,char * str)39*7c478bd9Sstevel@tonic-gate set_options_mask(options *msk, char *str)
40*7c478bd9Sstevel@tonic-gate {
41*7c478bd9Sstevel@tonic-gate 	int i;
42*7c478bd9Sstevel@tonic-gate 	(void) memset(msk, 0, sizeof (*msk));
43*7c478bd9Sstevel@tonic-gate 	for (i = 0; str[i] != 0; i++) {
44*7c478bd9Sstevel@tonic-gate 		add_option(msk, str[i]);
45*7c478bd9Sstevel@tonic-gate 	}
46*7c478bd9Sstevel@tonic-gate }
47*7c478bd9Sstevel@tonic-gate 
48*7c478bd9Sstevel@tonic-gate void
add_option(options * msk,char option)49*7c478bd9Sstevel@tonic-gate add_option(options *msk, char option)
50*7c478bd9Sstevel@tonic-gate {
51*7c478bd9Sstevel@tonic-gate 	uint_t loc;
52*7c478bd9Sstevel@tonic-gate 	loc = (uint_t)option;
53*7c478bd9Sstevel@tonic-gate 	loc &= 0x7f;
54*7c478bd9Sstevel@tonic-gate 	/* put option into the correct bucket */
55*7c478bd9Sstevel@tonic-gate 	msk->bitmap[loc >> 3] |= bitlocation[loc & 7];
56*7c478bd9Sstevel@tonic-gate }
57*7c478bd9Sstevel@tonic-gate 
58*7c478bd9Sstevel@tonic-gate /*
59*7c478bd9Sstevel@tonic-gate  * Compare the bytemask of the command line options used with
60*7c478bd9Sstevel@tonic-gate  * acceptable options. If an invalid option is found use it as
61*7c478bd9Sstevel@tonic-gate  * the return value.
62*7c478bd9Sstevel@tonic-gate  */
63*7c478bd9Sstevel@tonic-gate int
compare_options_mask(options * msk,options * specified)64*7c478bd9Sstevel@tonic-gate compare_options_mask(options *msk, options *specified)
65*7c478bd9Sstevel@tonic-gate {
66*7c478bd9Sstevel@tonic-gate 	int i, j;
67*7c478bd9Sstevel@tonic-gate 	uchar_t bmap = 0;
68*7c478bd9Sstevel@tonic-gate 
69*7c478bd9Sstevel@tonic-gate 	for (i = 0; i < 16; i++) {
70*7c478bd9Sstevel@tonic-gate 		if (msk->bitmap[i] == specified->bitmap[i])
71*7c478bd9Sstevel@tonic-gate 			continue;
72*7c478bd9Sstevel@tonic-gate 		bmap = msk->bitmap[i] | specified->bitmap[i];
73*7c478bd9Sstevel@tonic-gate 		bmap ^= msk->bitmap[i];
74*7c478bd9Sstevel@tonic-gate 		if (bmap)
75*7c478bd9Sstevel@tonic-gate 			break;
76*7c478bd9Sstevel@tonic-gate 	}
77*7c478bd9Sstevel@tonic-gate 	if (i == 16) {
78*7c478bd9Sstevel@tonic-gate 		/* no invalid options found */
79*7c478bd9Sstevel@tonic-gate 		return (0);
80*7c478bd9Sstevel@tonic-gate 	}
81*7c478bd9Sstevel@tonic-gate 
82*7c478bd9Sstevel@tonic-gate 	for (j = 0; j < 8; j++) {
83*7c478bd9Sstevel@tonic-gate 		if (bmap & bitlocation[j])
84*7c478bd9Sstevel@tonic-gate 			break;
85*7c478bd9Sstevel@tonic-gate 	}
86*7c478bd9Sstevel@tonic-gate 	return ((i*8) + j);
87*7c478bd9Sstevel@tonic-gate }
88