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/******************************************************************************
*
* Module Name: uthex -- Hex/ASCII support functions
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2025, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "acpi.h"
#include "accommon.h"
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("uthex")
/* Hex to ASCII conversion table */
static const char AcpiGbl_HexToAscii[] =
{
'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
};
/*******************************************************************************
*
* FUNCTION: AcpiUtHexToAsciiChar
*
* PARAMETERS: Integer - Contains the hex digit
* Position - bit position of the digit within the
* integer (multiple of 4)
*
* RETURN: The converted Ascii character
*
* DESCRIPTION: Convert a hex digit to an Ascii character
*
******************************************************************************/
char
AcpiUtHexToAsciiChar (
UINT64 Integer,
UINT32 Position)
{
UINT64 Index;
AcpiUtShortShiftRight (Integer, Position, &Index);
return (AcpiGbl_HexToAscii[Index & 0xF]);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtAsciiToHexByte
*
* PARAMETERS: TwoAsciiChars - Pointer to two ASCII characters
* ReturnByte - Where converted byte is returned
*
* RETURN: Status and converted hex byte
*
* DESCRIPTION: Perform ascii-to-hex translation, exactly two ASCII characters
* to a single converted byte value.
*
******************************************************************************/
ACPI_STATUS
AcpiUtAsciiToHexByte (
char *TwoAsciiChars,
UINT8 *ReturnByte)
{
/* Both ASCII characters must be valid hex digits */
if (!isxdigit ((int) TwoAsciiChars[0]) ||
!isxdigit ((int) TwoAsciiChars[1]))
{
return (AE_BAD_HEX_CONSTANT);
}
*ReturnByte =
AcpiUtAsciiCharToHex (TwoAsciiChars[1]) |
(AcpiUtAsciiCharToHex (TwoAsciiChars[0]) << 4);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtAsciiCharToHex
*
* PARAMETERS: HexChar - Hex character in Ascii. Must be:
* 0-9 or A-F or a-f
*
* RETURN: The binary value of the ascii/hex character
*
* DESCRIPTION: Perform ascii-to-hex translation
*
******************************************************************************/
UINT8
AcpiUtAsciiCharToHex (
int HexChar)
{
/* Values 0-9 */
if (HexChar <= '9')
{
return ((UINT8) (HexChar - '0'));
}
/* Upper case A-F */
if (HexChar <= 'F')
{
return ((UINT8) (HexChar - 0x37));
}
/* Lower case a-f */
return ((UINT8) (HexChar - 0x57));
}
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