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 } 141