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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: utascii - Utility ascii functions
*
* Copyright (C) 2000 - 2020, 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] = ' ';
}
}
}
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