1/******************************************************************************
2 *
3 * Module Name: utuuid -- UUID support functions
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2014, 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/*
51 * UUID support functions.
52 *
53 * This table is used to convert an input UUID ascii string to a 16 byte
54 * buffer and the reverse. The table maps a UUID buffer index 0-15 to
55 * the index within the 36-byte UUID string where the associated 2-byte
56 * hex value can be found.
57 *
58 * 36-byte UUID strings are of the form:
59 *     aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
60 * Where aa-pp are one byte hex numbers, made up of two hex digits
61 *
62 * Note: This table is basically the inverse of the string-to-offset table
63 * found in the ACPI spec in the description of the to_UUID macro.
64 */
65const u8 acpi_gbl_map_to_uuid_offset[UUID_BUFFER_LENGTH] = {
66	6, 4, 2, 0, 11, 9, 16, 14, 19, 21, 24, 26, 28, 30, 32, 34
67};
68
69/*******************************************************************************
70 *
71 * FUNCTION:    acpi_ut_convert_string_to_uuid
72 *
73 * PARAMETERS:  in_string           - 36-byte formatted UUID string
74 *              uuid_buffer         - Where the 16-byte UUID buffer is returned
75 *
76 * RETURN:      None. Output data is returned in the uuid_buffer
77 *
78 * DESCRIPTION: Convert a 36-byte formatted UUID string to 16-byte UUID buffer
79 *
80 ******************************************************************************/
81
82void acpi_ut_convert_string_to_uuid(char *in_string, u8 *uuid_buffer)
83{
84	u32 i;
85
86	for (i = 0; i < UUID_BUFFER_LENGTH; i++) {
87		uuid_buffer[i] =
88		    (acpi_ut_ascii_char_to_hex
89		     (in_string[acpi_gbl_map_to_uuid_offset[i]]) << 4);
90
91		uuid_buffer[i] |=
92		    acpi_ut_ascii_char_to_hex(in_string
93					      [acpi_gbl_map_to_uuid_offset[i] +
94					       1]);
95	}
96}
97