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1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: uthex -- Hex/ASCII support functions | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
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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 | |
48 | ACPI_MODULE_NAME("uthex") | |
49 | ||
50 | /* Hex to ASCII conversion table */ | |
c118abc5 | 51 | static const char acpi_gbl_hex_to_ascii[] = { |
73bbca04 BM |
52 | '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', |
53 | 'E', 'F' | |
54 | }; | |
55 | ||
56 | /******************************************************************************* | |
57 | * | |
58 | * FUNCTION: acpi_ut_hex_to_ascii_char | |
59 | * | |
60 | * PARAMETERS: integer - Contains the hex digit | |
61 | * position - bit position of the digit within the | |
62 | * integer (multiple of 4) | |
63 | * | |
64 | * RETURN: The converted Ascii character | |
65 | * | |
66 | * DESCRIPTION: Convert a hex digit to an Ascii character | |
67 | * | |
68 | ******************************************************************************/ | |
69 | ||
70 | char acpi_ut_hex_to_ascii_char(u64 integer, u32 position) | |
71 | { | |
72 | ||
73 | return (acpi_gbl_hex_to_ascii[(integer >> position) & 0xF]); | |
74 | } | |
75 | ||
76 | /******************************************************************************* | |
77 | * | |
04f8e384 | 78 | * FUNCTION: acpi_ut_ascii_char_to_hex |
73bbca04 | 79 | * |
04f8e384 | 80 | * PARAMETERS: hex_char - Hex character in Ascii |
73bbca04 BM |
81 | * |
82 | * RETURN: The binary value of the ascii/hex character | |
83 | * | |
84 | * DESCRIPTION: Perform ascii-to-hex translation | |
85 | * | |
86 | ******************************************************************************/ | |
87 | ||
88 | u8 acpi_ut_ascii_char_to_hex(int hex_char) | |
89 | { | |
90 | ||
91 | if (hex_char <= 0x39) { | |
92 | return ((u8)(hex_char - 0x30)); | |
93 | } | |
94 | ||
95 | if (hex_char <= 0x46) { | |
96 | return ((u8)(hex_char - 0x37)); | |
97 | } | |
98 | ||
99 | return ((u8)(hex_char - 0x57)); | |
100 | } |