uthex.c revision 306536 
1/******************************************************************************
2 *
3 * Module Name: uthex -- Hex/ASCII support functions
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, 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 <contrib/dev/acpica/include/acpi.h>
45#include <contrib/dev/acpica/include/accommon.h>
46
47#define _COMPONENT          ACPI_COMPILER
48        ACPI_MODULE_NAME    ("uthex")
49
50
51/* Hex to ASCII conversion table */
52
53static const char           AcpiGbl_HexToAscii[] =
54{
55    '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
56};
57
58
59/*******************************************************************************
60 *
61 * FUNCTION:    AcpiUtHexToAsciiChar
62 *
63 * PARAMETERS:  Integer             - Contains the hex digit
64 *              Position            - bit position of the digit within the
65 *                                    integer (multiple of 4)
66 *
67 * RETURN:      The converted Ascii character
68 *
69 * DESCRIPTION: Convert a hex digit to an Ascii character
70 *
71 ******************************************************************************/
72
73char
74AcpiUtHexToAsciiChar (
75    UINT64                  Integer,
76    UINT32                  Position)
77{
78
79    return (AcpiGbl_HexToAscii[(Integer >> Position) & 0xF]);
80}
81
82
83/*******************************************************************************
84 *
85 * FUNCTION:    AcpiUtAsciiCharToHex
86 *
87 * PARAMETERS:  HexChar                 - Hex character in Ascii
88 *
89 * RETURN:      The binary value of the ascii/hex character
90 *
91 * DESCRIPTION: Perform ascii-to-hex translation
92 *
93 ******************************************************************************/
94
95UINT8
96AcpiUtAsciiCharToHex (
97    int                     HexChar)
98{
99
100    if (HexChar <= 0x39)
101    {
102        return ((UINT8) (HexChar - 0x30));
103    }
104
105    if (HexChar <= 0x46)
106    {
107        return ((UINT8) (HexChar - 0x37));
108    }
109
110    return ((UINT8) (HexChar - 0x57));
111}
112