138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: uthex -- Hex/ASCII support functions
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2016, 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 MERCHANTIBILITY 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/acpi.h>
|
|
#include "accommon.h"
|
|
|
|
#define _COMPONENT ACPI_COMPILER
|
|
ACPI_MODULE_NAME("uthex")
|
|
|
|
/* Hex to ASCII conversion table */
|
|
static const char acpi_gbl_hex_to_ascii[] = {
|
|
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
|
|
'E', 'F'
|
|
};
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_hex_to_ascii_char
|
|
*
|
|
* 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 acpi_ut_hex_to_ascii_char(u64 integer, u32 position)
|
|
{
|
|
|
|
return (acpi_gbl_hex_to_ascii[(integer >> position) & 0xF]);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_ascii_to_hex_byte
|
|
*
|
|
* PARAMETERS: two_ascii_chars - Pointer to two ASCII characters
|
|
* return_byte - 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 acpi_ut_ascii_to_hex_byte(char *two_ascii_chars, u8 *return_byte)
|
|
{
|
|
|
|
/* Both ASCII characters must be valid hex digits */
|
|
|
|
if (!isxdigit((int)two_ascii_chars[0]) ||
|
|
!isxdigit((int)two_ascii_chars[1])) {
|
|
return (AE_BAD_HEX_CONSTANT);
|
|
}
|
|
|
|
*return_byte =
|
|
acpi_ut_ascii_char_to_hex(two_ascii_chars[1]) |
|
|
(acpi_ut_ascii_char_to_hex(two_ascii_chars[0]) << 4);
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_ascii_char_to_hex
|
|
*
|
|
* PARAMETERS: hex_char - 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
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_ut_ascii_char_to_hex(int hex_char)
|
|
{
|
|
|
|
/* Values 0-9 */
|
|
|
|
if (hex_char <= '9') {
|
|
return ((u8)(hex_char - '0'));
|
|
}
|
|
|
|
/* Upper case A-F */
|
|
|
|
if (hex_char <= 'F') {
|
|
return ((u8)(hex_char - 0x37));
|
|
}
|
|
|
|
/* Lower case a-f */
|
|
|
|
return ((u8)(hex_char - 0x57));
|
|
}
|