| Bob Moore | 6a0df32 | 2016-05-05 13:00:36 +0800 | [diff] [blame] | 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 | } |