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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: utuuid -- UUID support functions * * Copyright (C) 2000 - 2023, 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]); } } /******************************************************************************* * * FUNCTION: acpi_ut_convert_uuid_to_string * * PARAMETERS: uuid_buffer - 16-byte UUID buffer * out_string - 36-byte formatted UUID string * * RETURN: Status * * DESCRIPTION: Convert 16-byte UUID buffer to 36-byte formatted UUID string * out_string must be 37 bytes to include null terminator. * ******************************************************************************/ acpi_status acpi_ut_convert_uuid_to_string(char *uuid_buffer, char *out_string) { u32 i; if (!uuid_buffer || !out_string) { return (AE_BAD_PARAMETER); } for (i = 0; i < UUID_BUFFER_LENGTH; i++) { out_string[acpi_gbl_map_to_uuid_offset[i]] = acpi_ut_hex_to_ascii_char(uuid_buffer[i], 4); out_string[acpi_gbl_map_to_uuid_offset[i] + 1] = acpi_ut_hex_to_ascii_char(uuid_buffer[i], 0); } /* Insert required hyphens (dashes) */ out_string[UUID_HYPHEN1_OFFSET] = out_string[UUID_HYPHEN2_OFFSET] = out_string[UUID_HYPHEN3_OFFSET] = out_string[UUID_HYPHEN4_OFFSET] = '-'; out_string[UUID_STRING_LENGTH] = 0; /* Null terminate */ return (AE_OK); } #endif |