// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: utuuid -- UUID support functions * * Copyright (C) 2000 - 2019, Intel Corp. * *****************************************************************************/ #include <acpi/acpi.h> #include "accommon.h" #define _COMPONENT ACPI_COMPILER ACPI_MODULE_NAME("utuuid") #if (defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP || defined ACPI_HELP_APP) /* * UUID support functions. * * This table is used to convert an input UUID ascii string to a 16 byte * buffer and the reverse. The table maps a UUID buffer index 0-15 to * the index within the 36-byte UUID string where the associated 2-byte * hex value can be found. * * 36-byte UUID strings are of the form: * aabbccdd-eeff-gghh-iijj-kkllmmnnoopp * Where aa-pp are one byte hex numbers, made up of two hex digits * * Note: This table is basically the inverse of the string-to-offset table * found in the ACPI spec in the description of the to_UUID macro. */ const u8 acpi_gbl_map_to_uuid_offset[UUID_BUFFER_LENGTH] = { 6, 4, 2, 0, 11, 9, 16, 14, 19, 21, 24, 26, 28, 30, 32, 34 }; /******************************************************************************* * * FUNCTION: acpi_ut_convert_string_to_uuid * * PARAMETERS: in_string - 36-byte formatted UUID string * uuid_buffer - Where the 16-byte UUID buffer is returned * * RETURN: None. Output data is returned in the uuid_buffer * * DESCRIPTION: Convert a 36-byte formatted UUID string to 16-byte UUID buffer * ******************************************************************************/ void acpi_ut_convert_string_to_uuid(char *in_string, u8 *uuid_buffer) { u32 i; for (i = 0; i < UUID_BUFFER_LENGTH; i++) { uuid_buffer[i] = (acpi_ut_ascii_char_to_hex (in_string[acpi_gbl_map_to_uuid_offset[i]]) << 4); uuid_buffer[i] |= acpi_ut_ascii_char_to_hex(in_string [acpi_gbl_map_to_uuid_offset[i] + 1]); } } #endif