1/******************************************************************************
2 *
3 * Module Name: utuuid -- UUID support functions
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2015, 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
48ACPI_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 */
66const 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
83void 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