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Release 4.11 drivers/acpi/acpica/utnonansi.c

/*******************************************************************************
 *
 * Module Name: utnonansi - Non-ansi C library functions
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2017, 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_UTILITIES
ACPI_MODULE_NAME("utnonansi")

/*
 * Non-ANSI C library functions - strlwr, strupr, stricmp, and "safe"
 * string functions.
 */
/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_strlwr (strlwr)
 *
 * PARAMETERS:  src_string      - The source string to convert
 *
 * RETURN:      None
 *
 * DESCRIPTION: Convert a string to lowercase
 *
 ******************************************************************************/

void acpi_ut_strlwr(char *src_string) { char *string; ACPI_FUNCTION_ENTRY(); if (!src_string) { return; } /* Walk entire string, lowercasing the letters */ for (string = src_string; *string; string++) { *string = (char)tolower((int)*string); } }

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/******************************************************************************* * * FUNCTION: acpi_ut_strupr (strupr) * * PARAMETERS: src_string - The source string to convert * * RETURN: None * * DESCRIPTION: Convert a string to uppercase * ******************************************************************************/
void acpi_ut_strupr(char *src_string) { char *string; ACPI_FUNCTION_ENTRY(); if (!src_string) { return; } /* Walk entire string, uppercasing the letters */ for (string = src_string; *string; string++) { *string = (char)toupper((int)*string); } }

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/****************************************************************************** * * FUNCTION: acpi_ut_stricmp (stricmp) * * PARAMETERS: string1 - first string to compare * string2 - second string to compare * * RETURN: int that signifies string relationship. Zero means strings * are equal. * * DESCRIPTION: Case-insensitive string compare. Implementation of the * non-ANSI stricmp function. * ******************************************************************************/
int acpi_ut_stricmp(char *string1, char *string2) { int c1; int c2; do { c1 = tolower((int)*string1); c2 = tolower((int)*string2); string1++; string2++; } while ((c1 == c2) && (c1)); return (c1 - c2); }

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#if defined (ACPI_DEBUGGER) || defined (ACPI_APPLICATION) /******************************************************************************* * * FUNCTION: acpi_ut_safe_strcpy, acpi_ut_safe_strcat, acpi_ut_safe_strncat * * PARAMETERS: Adds a "DestSize" parameter to each of the standard string * functions. This is the size of the Destination buffer. * * RETURN: TRUE if the operation would overflow the destination buffer. * * DESCRIPTION: Safe versions of standard Clib string functions. Ensure that * the result of the operation will not overflow the output string * buffer. * * NOTE: These functions are typically only helpful for processing * user input and command lines. For most ACPICA code, the * required buffer length is precisely calculated before buffer * allocation, so the use of these functions is unnecessary. * ******************************************************************************/
u8 acpi_ut_safe_strcpy(char *dest, acpi_size dest_size, char *source) { if (strlen(source) >= dest_size) { return (TRUE); } strcpy(dest, source); return (FALSE); }

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u8 acpi_ut_safe_strcat(char *dest, acpi_size dest_size, char *source) { if ((strlen(dest) + strlen(source)) >= dest_size) { return (TRUE); } strcat(dest, source); return (FALSE); }

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u8 acpi_ut_safe_strncat(char *dest, acpi_size dest_size, char *source, acpi_size max_transfer_length) { acpi_size actual_transfer_length; actual_transfer_length = ACPI_MIN(max_transfer_length, strlen(source)); if ((strlen(dest) + actual_transfer_length) >= dest_size) { return (TRUE); } strncat(dest, source, max_transfer_length); return (FALSE); }

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#endif

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