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1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: utascii - Utility ascii functions | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2016, Intel Corp. | |
9 | * All rights reserved. | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | #include <acpi/acpi.h> | |
45 | #include "accommon.h" | |
46 | ||
47 | /******************************************************************************* | |
48 | * | |
49 | * FUNCTION: acpi_ut_valid_nameseg | |
50 | * | |
51 | * PARAMETERS: name - The name or table signature to be examined. | |
52 | * Four characters, does not have to be a | |
53 | * NULL terminated string. | |
54 | * | |
55 | * RETURN: TRUE if signature is has 4 valid ACPI characters | |
56 | * | |
57 | * DESCRIPTION: Validate an ACPI table signature. | |
58 | * | |
59 | ******************************************************************************/ | |
60 | ||
61 | u8 acpi_ut_valid_nameseg(char *name) | |
62 | { | |
63 | u32 i; | |
64 | ||
65 | /* Validate each character in the signature */ | |
66 | ||
67 | for (i = 0; i < ACPI_NAME_SIZE; i++) { | |
68 | if (!acpi_ut_valid_name_char(name[i], i)) { | |
69 | return (FALSE); | |
70 | } | |
71 | } | |
72 | ||
73 | return (TRUE); | |
74 | } | |
75 | ||
76 | /******************************************************************************* | |
77 | * | |
78 | * FUNCTION: acpi_ut_valid_name_char | |
79 | * | |
80 | * PARAMETERS: char - The character to be examined | |
81 | * position - Byte position (0-3) | |
82 | * | |
83 | * RETURN: TRUE if the character is valid, FALSE otherwise | |
84 | * | |
85 | * DESCRIPTION: Check for a valid ACPI character. Must be one of: | |
86 | * 1) Upper case alpha | |
87 | * 2) numeric | |
88 | * 3) underscore | |
89 | * | |
90 | * We allow a '!' as the last character because of the ASF! table | |
91 | * | |
92 | ******************************************************************************/ | |
93 | ||
94 | u8 acpi_ut_valid_name_char(char character, u32 position) | |
95 | { | |
96 | ||
97 | if (!((character >= 'A' && character <= 'Z') || | |
98 | (character >= '0' && character <= '9') || (character == '_'))) { | |
99 | ||
100 | /* Allow a '!' in the last position */ | |
101 | ||
102 | if (character == '!' && position == 3) { | |
103 | return (TRUE); | |
104 | } | |
105 | ||
106 | return (FALSE); | |
107 | } | |
108 | ||
109 | return (TRUE); | |
110 | } | |
111 | ||
112 | /******************************************************************************* | |
113 | * | |
114 | * FUNCTION: acpi_ut_check_and_repair_ascii | |
115 | * | |
116 | * PARAMETERS: name - Ascii string | |
117 | * count - Number of characters to check | |
118 | * | |
119 | * RETURN: None | |
120 | * | |
121 | * DESCRIPTION: Ensure that the requested number of characters are printable | |
122 | * Ascii characters. Sets non-printable and null chars to <space>. | |
123 | * | |
124 | ******************************************************************************/ | |
125 | ||
126 | void acpi_ut_check_and_repair_ascii(u8 *name, char *repaired_name, u32 count) | |
127 | { | |
128 | u32 i; | |
129 | ||
130 | for (i = 0; i < count; i++) { | |
131 | repaired_name[i] = (char)name[i]; | |
132 | ||
133 | if (!name[i]) { | |
134 | return; | |
135 | } | |
136 | if (!isprint(name[i])) { | |
137 | repaired_name[i] = ' '; | |
138 | } | |
139 | } | |
140 | } |