107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: utascii - Utility ascii functions
|
|
*
|
|
* Copyright (C) 2000 - 2022, Intel Corp.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_valid_nameseg
|
|
*
|
|
* PARAMETERS: name - The name or table signature to be examined.
|
|
* Four characters, does not have to be a
|
|
* NULL terminated string.
|
|
*
|
|
* RETURN: TRUE if signature is has 4 valid ACPI characters
|
|
*
|
|
* DESCRIPTION: Validate an ACPI table signature.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_ut_valid_nameseg(char *name)
|
|
{
|
|
u32 i;
|
|
|
|
/* Validate each character in the signature */
|
|
|
|
for (i = 0; i < ACPI_NAMESEG_SIZE; i++) {
|
|
if (!acpi_ut_valid_name_char(name[i], i)) {
|
|
return (FALSE);
|
|
}
|
|
}
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_valid_name_char
|
|
*
|
|
* PARAMETERS: char - The character to be examined
|
|
* position - Byte position (0-3)
|
|
*
|
|
* RETURN: TRUE if the character is valid, FALSE otherwise
|
|
*
|
|
* DESCRIPTION: Check for a valid ACPI character. Must be one of:
|
|
* 1) Upper case alpha
|
|
* 2) numeric
|
|
* 3) underscore
|
|
*
|
|
* We allow a '!' as the last character because of the ASF! table
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_ut_valid_name_char(char character, u32 position)
|
|
{
|
|
|
|
if (!((character >= 'A' && character <= 'Z') ||
|
|
(character >= '0' && character <= '9') || (character == '_'))) {
|
|
|
|
/* Allow a '!' in the last position */
|
|
|
|
if (character == '!' && position == 3) {
|
|
return (TRUE);
|
|
}
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_check_and_repair_ascii
|
|
*
|
|
* PARAMETERS: name - Ascii string
|
|
* count - Number of characters to check
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Ensure that the requested number of characters are printable
|
|
* Ascii characters. Sets non-printable and null chars to <space>.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ut_check_and_repair_ascii(u8 *name, char *repaired_name, u32 count)
|
|
{
|
|
u32 i;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
repaired_name[i] = (char)name[i];
|
|
|
|
if (!name[i]) {
|
|
return;
|
|
}
|
|
if (!isprint(name[i])) {
|
|
repaired_name[i] = ' ';
|
|
}
|
|
}
|
|
}
|