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+/******************************************************************************
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+ *
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+ * Module Name: utascii - Utility ascii functions
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+ *
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+ *****************************************************************************/
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+
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+/*
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+ * Copyright (C) 2000 - 2016, Intel Corp.
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+ * All rights reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions
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+ * are met:
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+ * 1. Redistributions of source code must retain the above copyright
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+ * notice, this list of conditions, and the following disclaimer,
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+ * without modification.
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+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
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+ * substantially similar to the "NO WARRANTY" disclaimer below
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+ * ("Disclaimer") and any redistribution must be conditioned upon
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+ * including a substantially similar Disclaimer requirement for further
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+ * binary redistribution.
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+ * 3. Neither the names of the above-listed copyright holders nor the names
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+ * of any contributors may be used to endorse or promote products derived
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+ * from this software without specific prior written permission.
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+ *
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+ * Alternatively, this software may be distributed under the terms of the
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+ * GNU General Public License ("GPL") version 2 as published by the Free
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+ * Software Foundation.
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+ *
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+ * NO WARRANTY
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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+ * POSSIBILITY OF SUCH DAMAGES.
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+ */
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+
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+#include <acpi/acpi.h>
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+#include "accommon.h"
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+
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+/*******************************************************************************
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+ *
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+ * FUNCTION: acpi_ut_valid_nameseg
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+ *
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+ * PARAMETERS: name - The name or table signature to be examined.
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+ * Four characters, does not have to be a
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+ * NULL terminated string.
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+ *
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+ * RETURN: TRUE if signature is has 4 valid ACPI characters
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+ *
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+ * DESCRIPTION: Validate an ACPI table signature.
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+ *
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+ ******************************************************************************/
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+
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+u8 acpi_ut_valid_nameseg(char *name)
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+{
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+ u32 i;
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+
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+ /* Validate each character in the signature */
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+
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+ for (i = 0; i < ACPI_NAME_SIZE; i++) {
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+ if (!acpi_ut_valid_name_char(name[i], i)) {
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+ return (FALSE);
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+ }
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+ }
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+
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+ return (TRUE);
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+}
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+
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+/*******************************************************************************
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+ *
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+ * FUNCTION: acpi_ut_valid_name_char
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+ *
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+ * PARAMETERS: char - The character to be examined
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+ * position - Byte position (0-3)
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+ *
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+ * RETURN: TRUE if the character is valid, FALSE otherwise
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+ *
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+ * DESCRIPTION: Check for a valid ACPI character. Must be one of:
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+ * 1) Upper case alpha
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+ * 2) numeric
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+ * 3) underscore
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+ *
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+ * We allow a '!' as the last character because of the ASF! table
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+ *
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+ ******************************************************************************/
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+
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+u8 acpi_ut_valid_name_char(char character, u32 position)
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+{
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+
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+ if (!((character >= 'A' && character <= 'Z') ||
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+ (character >= '0' && character <= '9') || (character == '_'))) {
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+
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+ /* Allow a '!' in the last position */
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+
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+ if (character == '!' && position == 3) {
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+ return (TRUE);
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+ }
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+
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+ return (FALSE);
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+ }
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+
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+ return (TRUE);
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+}
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+
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+/*******************************************************************************
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+ *
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+ * FUNCTION: acpi_ut_check_and_repair_ascii
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+ *
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+ * PARAMETERS: name - Ascii string
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+ * count - Number of characters to check
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+ *
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+ * RETURN: None
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+ *
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+ * DESCRIPTION: Ensure that the requested number of characters are printable
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+ * Ascii characters. Sets non-printable and null chars to <space>.
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+ *
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+ ******************************************************************************/
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+
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+void acpi_ut_check_and_repair_ascii(u8 *name, char *repaired_name, u32 count)
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+{
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+ u32 i;
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+
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+ for (i = 0; i < count; i++) {
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+ repaired_name[i] = (char)name[i];
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+
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+ if (!name[i]) {
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+ return;
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+ }
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+ if (!isprint(name[i])) {
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+ repaired_name[i] = ' ';
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+ }
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+ }
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+}
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Bob Moore