mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
![Erik Schmauss](/assets/img/avatar_default.png)
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: utuuid -- UUID support functions
|
|
*
|
|
* Copyright (C) 2000 - 2018, 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
|