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