1 /******************************************************************************
2  *
3  * Module Name: uthex -- Hex/ASCII 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 #define __UTHEX_C__
45 
46 #include "acpi.h"
47 #include "accommon.h"
48 
49 #define _COMPONENT          ACPI_COMPILER
50         ACPI_MODULE_NAME    ("uthex")
51 
52 
53 /* Hex to ASCII conversion table */
54 
55 static char                 AcpiGbl_HexToAscii[] =
56 {
57     '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
58 };
59 
60 
61 /*******************************************************************************
62  *
63  * FUNCTION:    AcpiUtHexToAsciiChar
64  *
65  * PARAMETERS:  Integer             - Contains the hex digit
66  *              Position            - bit position of the digit within the
67  *                                    integer (multiple of 4)
68  *
69  * RETURN:      The converted Ascii character
70  *
71  * DESCRIPTION: Convert a hex digit to an Ascii character
72  *
73  ******************************************************************************/
74 
75 char
76 AcpiUtHexToAsciiChar (
77     UINT64                  Integer,
78     UINT32                  Position)
79 {
80 
81     return (AcpiGbl_HexToAscii[(Integer >> Position) & 0xF]);
82 }
83 
84 
85 /*******************************************************************************
86  *
87  * FUNCTION:    AcpiUtHexCharToValue
88  *
89  * PARAMETERS:  AsciiChar             - Hex character in Ascii
90  *
91  * RETURN:      The binary value of the ascii/hex character
92  *
93  * DESCRIPTION: Perform ascii-to-hex translation
94  *
95  ******************************************************************************/
96 
97 UINT8
98 AcpiUtAsciiCharToHex (
99     int                     HexChar)
100 {
101 
102     if (HexChar <= 0x39)
103     {
104         return ((UINT8) (HexChar - 0x30));
105     }
106 
107     if (HexChar <= 0x46)
108     {
109         return ((UINT8) (HexChar - 0x37));
110     }
111 
112     return ((UINT8) (HexChar - 0x57));
113 }
114