1 /*	$NetBSD: cd9660_strings.c,v 1.4 2007/01/16 17:32:05 hubertf Exp $	*/
2 
3 /*-
4  * SPDX-License-Identifier: BSD-2-Clause-NetBSD
5  *
6  * Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
7  * Perez-Rathke and Ram Vedam.  All rights reserved.
8  *
9  * This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
10  * Alan Perez-Rathke and Ram Vedam.
11  *
12  * Redistribution and use in source and binary forms, with or
13  * without modification, are permitted provided that the following
14  * conditions are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above
18  *    copyright notice, this list of conditions and the following
19  *    disclaimer in the documentation and/or other materials provided
20  *    with the distribution.
21  *
22  * THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
23  * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR
24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26  * DISCLAIMED.  IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN
27  * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT,
28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
30  * USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
31  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
34  * OF SUCH DAMAGE.
35  *
36  * $FreeBSD: head/usr.sbin/makefs/cd9660/cd9660_strings.c 326276 2017-11-27 15:37:16Z pfg $
37  */
38 
39 #include <sys/mount.h>
40 
41 #include <sys/param.h>
42 #include <ctype.h>
43 
44 #include "makefs.h"
45 #include "cd9660.h"
46 
47 
48 void
49 cd9660_uppercase_characters(char *str, int len)
50 {
51 	int p;
52 
53 	for (p = 0; p < len; p++) {
54 		if (islower((unsigned char)str[p]) )
55 			str[p] -= 32;
56 	}
57 }
58 
59 static inline int
60 cd9660_is_d_char(char c)
61 {
62 	return (isupper((unsigned char)c)
63 		|| c == '_'
64 		|| (c >= '0' && c <= '9'));
65 }
66 
67 static inline int
68 cd9660_is_a_char(char c)
69 {
70 	return (isupper((unsigned char)c)
71 			|| c == '_'
72 			|| (c >= '%' && c <= '?')
73 			|| (c >= ' ' && c <= '\"'));
74 }
75 
76 /*
77  * Test a string to see if it is composed of valid a characters
78  * @param const char* The string to test
79  * @returns int 1 if valid, 2 if valid if characters are converted to
80  *              upper case, 0 otherwise
81  */
82 int
83 cd9660_valid_a_chars(const char *str)
84 {
85 	const char *c = str;
86 	int upperFound = 0;
87 
88 	while ((*c) != '\0') {
89 		if (!(cd9660_is_a_char(*c))) {
90 			if (islower((unsigned char)*c) )
91 				upperFound = 1;
92 			else
93 				return 0;
94 		}
95 		c++;
96 	}
97 	return upperFound + 1;
98 }
99 
100 /*
101  * Test a string to see if it is composed of valid d characters
102  * @param const char* The string to test
103  * @returns int 1 if valid, 2 if valid if characters are converted to
104  *                upper case, 0 otherwise
105  */
106 int
107 cd9660_valid_d_chars(const char *str)
108 {
109 	const char *c=str;
110 	int upperFound = 0;
111 
112 	while ((*c) != '\0') {
113 		if (!(cd9660_is_d_char(*c))) {
114 			if (islower((unsigned char)*c) )
115 				upperFound = 1;
116 			else
117 				return 0;
118 		}
119 		c++;
120 	}
121 	return upperFound + 1;
122 }
123