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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/acpi/acpica/utascii.c | |
parent | Initial commit. (diff) | |
download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/acpi/acpica/utascii.c')
-rw-r--r-- | drivers/acpi/acpica/utascii.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utascii.c b/drivers/acpi/acpica/utascii.c new file mode 100644 index 000000000..04ff61e28 --- /dev/null +++ b/drivers/acpi/acpica/utascii.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/****************************************************************************** + * + * Module Name: utascii - Utility ascii functions + * + * Copyright (C) 2000 - 2018, 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_NAME_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] = ' '; + } + } +} |