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uthex.c revision 1.1 
      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