/*******************************************************************************
*
* 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);
}
}
/*******************************************************************************
*
* 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);
}
}
/******************************************************************************
*
* 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);
}
#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);
}
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);
}
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);
}
#endif
