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.h"
45 #include "accommon.h"
46
47
48 /*******************************************************************************
49 *
50 * FUNCTION: AcpiUtValidNameseg
51 *
52 * PARAMETERS: Name - The name or table signature to be examined.
53 * Four characters, does not have to be a
54 * NULL terminated string.
55 *
56 * RETURN: TRUE if signature is has 4 valid ACPI characters
57 *
58 * DESCRIPTION: Validate an ACPI table signature.
59 *
60 ******************************************************************************/
61
62 BOOLEAN
AcpiUtValidNameseg(char * Name)63 AcpiUtValidNameseg (
64 char *Name)
65 {
66 UINT32 i;
67
68
69 /* Validate each character in the signature */
70
71 for (i = 0; i < ACPI_NAME_SIZE; i++)
72 {
73 if (!AcpiUtValidNameChar (Name[i], i))
74 {
75 return (FALSE);
76 }
77 }
78
79 return (TRUE);
80 }
81
82
83 /*******************************************************************************
84 *
85 * FUNCTION: AcpiUtValidNameChar
86 *
87 * PARAMETERS: Char - The character to be examined
88 * Position - Byte position (0-3)
89 *
90 * RETURN: TRUE if the character is valid, FALSE otherwise
91 *
92 * DESCRIPTION: Check for a valid ACPI character. Must be one of:
93 * 1) Upper case alpha
94 * 2) numeric
95 * 3) underscore
96 *
97 * We allow a '!' as the last character because of the ASF! table
98 *
99 ******************************************************************************/
100
101 BOOLEAN
AcpiUtValidNameChar(char Character,UINT32 Position)102 AcpiUtValidNameChar (
103 char Character,
104 UINT32 Position)
105 {
106
107 if (!((Character >= 'A' && Character <= 'Z') ||
108 (Character >= '0' && Character <= '9') ||
109 (Character == '_')))
110 {
111 /* Allow a '!' in the last position */
112
113 if (Character == '!' && Position == 3)
114 {
115 return (TRUE);
116 }
117
118 return (FALSE);
119 }
120
121 return (TRUE);
122 }
123
124
125 /*******************************************************************************
126 *
127 * FUNCTION: AcpiUtCheckAndRepairAscii
128 *
129 * PARAMETERS: Name - Ascii string
130 * Count - Number of characters to check
131 *
132 * RETURN: None
133 *
134 * DESCRIPTION: Ensure that the requested number of characters are printable
135 * Ascii characters. Sets non-printable and null chars to <space>.
136 *
137 ******************************************************************************/
138
139 void
AcpiUtCheckAndRepairAscii(UINT8 * Name,char * RepairedName,UINT32 Count)140 AcpiUtCheckAndRepairAscii (
141 UINT8 *Name,
142 char *RepairedName,
143 UINT32 Count)
144 {
145 UINT32 i;
146
147
148 for (i = 0; i < Count; i++)
149 {
150 RepairedName[i] = (char) Name[i];
151
152 if (!Name[i])
153 {
154 return;
155 }
156 if (!isprint (Name[i]))
157 {
158 RepairedName[i] = ' ';
159 }
160 }
161 }
162