| 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 |
| 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 |
| 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 |
| 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 | |