1 /****************************************************************************** 2 * 3 * Module Name: uthex -- Hex/ASCII support functions 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2017, 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 <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/accommon.h> 46 47 #define _COMPONENT ACPI_COMPILER 48 ACPI_MODULE_NAME ("uthex") 49 50 51 /* Hex to ASCII conversion table */ 52 53 static const char AcpiGbl_HexToAscii[] = 54 { 55 '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' 56 }; 57 58 59 /******************************************************************************* 60 * 61 * FUNCTION: AcpiUtHexToAsciiChar 62 * 63 * PARAMETERS: Integer - Contains the hex digit 64 * Position - bit position of the digit within the 65 * integer (multiple of 4) 66 * 67 * RETURN: The converted Ascii character 68 * 69 * DESCRIPTION: Convert a hex digit to an Ascii character 70 * 71 ******************************************************************************/ 72 73 char 74 AcpiUtHexToAsciiChar ( 75 UINT64 Integer, 76 UINT32 Position) 77 { 78 79 return (AcpiGbl_HexToAscii[(Integer >> Position) & 0xF]); 80 } 81 82 83 /******************************************************************************* 84 * 85 * FUNCTION: AcpiUtAsciiToHexByte 86 * 87 * PARAMETERS: TwoAsciiChars - Pointer to two ASCII characters 88 * ReturnByte - Where converted byte is returned 89 * 90 * RETURN: Status and converted hex byte 91 * 92 * DESCRIPTION: Perform ascii-to-hex translation, exactly two ASCII characters 93 * to a single converted byte value. 94 * 95 ******************************************************************************/ 96 97 ACPI_STATUS 98 AcpiUtAsciiToHexByte ( 99 char *TwoAsciiChars, 100 UINT8 *ReturnByte) 101 { 102 103 /* Both ASCII characters must be valid hex digits */ 104 105 if (!isxdigit ((int) TwoAsciiChars[0]) || 106 !isxdigit ((int) TwoAsciiChars[1])) 107 { 108 return (AE_BAD_HEX_CONSTANT); 109 } 110 111 *ReturnByte = 112 AcpiUtAsciiCharToHex (TwoAsciiChars[1]) | 113 (AcpiUtAsciiCharToHex (TwoAsciiChars[0]) << 4); 114 115 return (AE_OK); 116 } 117 118 119 /******************************************************************************* 120 * 121 * FUNCTION: AcpiUtAsciiCharToHex 122 * 123 * PARAMETERS: HexChar - Hex character in Ascii. Must be: 124 * 0-9 or A-F or a-f 125 * 126 * RETURN: The binary value of the ascii/hex character 127 * 128 * DESCRIPTION: Perform ascii-to-hex translation 129 * 130 ******************************************************************************/ 131 132 UINT8 133 AcpiUtAsciiCharToHex ( 134 int HexChar) 135 { 136 137 /* Values 0-9 */ 138 139 if (HexChar <= '9') 140 { 141 return ((UINT8) (HexChar - '0')); 142 } 143 144 /* Upper case A-F */ 145 146 if (HexChar <= 'F') 147 { 148 return ((UINT8) (HexChar - 0x37)); 149 } 150 151 /* Lower case a-f */ 152 153 return ((UINT8) (HexChar - 0x57)); 154 } 155