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175 lines
4.4 KiB
175 lines
4.4 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/******************************************************************************* |
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* |
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* Module Name: utnonansi - Non-ansi C library functions |
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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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#define _COMPONENT ACPI_UTILITIES |
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ACPI_MODULE_NAME("utnonansi") |
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/* |
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* Non-ANSI C library functions - strlwr, strupr, stricmp, and "safe" |
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* string functions. |
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*/ |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ut_strlwr (strlwr) |
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* |
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* PARAMETERS: src_string - The source string to convert |
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* |
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* RETURN: None |
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* |
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* DESCRIPTION: Convert a string to lowercase |
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* |
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******************************************************************************/ |
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void acpi_ut_strlwr(char *src_string) |
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{ |
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char *string; |
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ACPI_FUNCTION_ENTRY(); |
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if (!src_string) { |
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return; |
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} |
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/* Walk entire string, lowercasing the letters */ |
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for (string = src_string; *string; string++) { |
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*string = (char)tolower((int)*string); |
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} |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ut_strupr (strupr) |
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* |
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* PARAMETERS: src_string - The source string to convert |
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* |
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* RETURN: None |
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* |
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* DESCRIPTION: Convert a string to uppercase |
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* |
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******************************************************************************/ |
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void acpi_ut_strupr(char *src_string) |
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{ |
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char *string; |
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ACPI_FUNCTION_ENTRY(); |
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if (!src_string) { |
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return; |
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} |
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/* Walk entire string, uppercasing the letters */ |
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for (string = src_string; *string; string++) { |
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*string = (char)toupper((int)*string); |
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} |
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} |
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/****************************************************************************** |
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* |
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* FUNCTION: acpi_ut_stricmp (stricmp) |
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* |
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* PARAMETERS: string1 - first string to compare |
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* string2 - second string to compare |
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* |
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* RETURN: int that signifies string relationship. Zero means strings |
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* are equal. |
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* |
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* DESCRIPTION: Case-insensitive string compare. Implementation of the |
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* non-ANSI stricmp function. |
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* |
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******************************************************************************/ |
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int acpi_ut_stricmp(char *string1, char *string2) |
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{ |
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int c1; |
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int c2; |
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do { |
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c1 = tolower((int)*string1); |
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c2 = tolower((int)*string2); |
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string1++; |
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string2++; |
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} |
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while ((c1 == c2) && (c1)); |
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return (c1 - c2); |
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} |
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#if defined (ACPI_DEBUGGER) || defined (ACPI_APPLICATION) || defined (ACPI_DEBUG_OUTPUT) |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ut_safe_strcpy, acpi_ut_safe_strcat, acpi_ut_safe_strncat |
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* |
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* PARAMETERS: Adds a "DestSize" parameter to each of the standard string |
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* functions. This is the size of the Destination buffer. |
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* |
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* RETURN: TRUE if the operation would overflow the destination buffer. |
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* |
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* DESCRIPTION: Safe versions of standard Clib string functions. Ensure that |
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* the result of the operation will not overflow the output string |
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* buffer. |
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* |
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* NOTE: These functions are typically only helpful for processing |
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* user input and command lines. For most ACPICA code, the |
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* required buffer length is precisely calculated before buffer |
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* allocation, so the use of these functions is unnecessary. |
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* |
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******************************************************************************/ |
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u8 acpi_ut_safe_strcpy(char *dest, acpi_size dest_size, char *source) |
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{ |
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if (strlen(source) >= dest_size) { |
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return (TRUE); |
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} |
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strcpy(dest, source); |
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return (FALSE); |
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} |
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u8 acpi_ut_safe_strcat(char *dest, acpi_size dest_size, char *source) |
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{ |
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if ((strlen(dest) + strlen(source)) >= dest_size) { |
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return (TRUE); |
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} |
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strcat(dest, source); |
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return (FALSE); |
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} |
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u8 |
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acpi_ut_safe_strncat(char *dest, |
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acpi_size dest_size, |
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char *source, acpi_size max_transfer_length) |
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{ |
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acpi_size actual_transfer_length; |
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actual_transfer_length = ACPI_MIN(max_transfer_length, strlen(source)); |
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if ((strlen(dest) + actual_transfer_length) >= dest_size) { |
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return (TRUE); |
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} |
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strncat(dest, source, max_transfer_length); |
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return (FALSE); |
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} |
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void acpi_ut_safe_strncpy(char *dest, char *source, acpi_size dest_size) |
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{ |
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/* Always terminate destination string */ |
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strncpy(dest, source, dest_size); |
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dest[dest_size - 1] = 0; |
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} |
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#endif
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