1 /****************************************************************************** 2 * 3 * Module Name: utuuid -- UUID support 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 #define _COMPONENT ACPI_COMPILER 48 ACPI_MODULE_NAME("utuuid") 49 50 #if (defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP || defined ACPI_HELP_APP) 51 /* 52 * UUID support functions. 53 * 54 * This table is used to convert an input UUID ascii string to a 16 byte 55 * buffer and the reverse. The table maps a UUID buffer index 0-15 to 56 * the index within the 36-byte UUID string where the associated 2-byte 57 * hex value can be found. 58 * 59 * 36-byte UUID strings are of the form: 60 * aabbccdd-eeff-gghh-iijj-kkllmmnnoopp 61 * Where aa-pp are one byte hex numbers, made up of two hex digits 62 * 63 * Note: This table is basically the inverse of the string-to-offset table 64 * found in the ACPI spec in the description of the to_UUID macro. 65 */ 66 const u8 acpi_gbl_map_to_uuid_offset[UUID_BUFFER_LENGTH] = { 67 6, 4, 2, 0, 11, 9, 16, 14, 19, 21, 24, 26, 28, 30, 32, 34 68 }; 69 70 /******************************************************************************* 71 * 72 * FUNCTION: acpi_ut_convert_string_to_uuid 73 * 74 * PARAMETERS: in_string - 36-byte formatted UUID string 75 * uuid_buffer - Where the 16-byte UUID buffer is returned 76 * 77 * RETURN: None. Output data is returned in the uuid_buffer 78 * 79 * DESCRIPTION: Convert a 36-byte formatted UUID string to 16-byte UUID buffer 80 * 81 ******************************************************************************/ 82 83 void acpi_ut_convert_string_to_uuid(char *in_string, u8 *uuid_buffer) 84 { 85 u32 i; 86 87 for (i = 0; i < UUID_BUFFER_LENGTH; i++) { 88 uuid_buffer[i] = 89 (acpi_ut_ascii_char_to_hex 90 (in_string[acpi_gbl_map_to_uuid_offset[i]]) << 4); 91 92 uuid_buffer[i] |= 93 acpi_ut_ascii_char_to_hex(in_string 94 [acpi_gbl_map_to_uuid_offset[i] + 95 1]); 96 } 97 } 98 #endif 99