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|
/*******************************************************************************
*
* Module Name: utstring - Common functions for strings and characters
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2013, 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.
*/
#define __UTSTRING_C__
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utstring")
/*
* Non-ANSI C library functions - strlwr, strupr, stricmp, and a 64-bit
* version of strtoul.
*/
#ifdef ACPI_ASL_COMPILER
/*******************************************************************************
*
* FUNCTION: AcpiUtStrlwr (strlwr)
*
* PARAMETERS: SrcString - The source string to convert
*
* RETURN: None
*
* DESCRIPTION: Convert string to lowercase
*
* NOTE: This is not a POSIX function, so it appears here, not in utclib.c
*
******************************************************************************/
void
AcpiUtStrlwr (
char *SrcString)
{
char *String;
ACPI_FUNCTION_ENTRY ();
if (!SrcString)
{
return;
}
/* Walk entire string, lowercasing the letters */
for (String = SrcString; *String; String++)
{
*String = (char) ACPI_TOLOWER (*String);
}
return;
}
/******************************************************************************
*
* FUNCTION: AcpiUtStricmp (stricmp)
*
* PARAMETERS: String1 - first string to compare
* String2 - second string to compare
*
* RETURN: int that signifies string relationship. Zero means strings
* are equal.
*
* DESCRIPTION: Implementation of the non-ANSI stricmp function (compare
* strings with no case sensitivity)
*
******************************************************************************/
int
AcpiUtStricmp (
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);
}
#endif
/*******************************************************************************
*
* FUNCTION: AcpiUtStrupr (strupr)
*
* PARAMETERS: SrcString - The source string to convert
*
* RETURN: None
*
* DESCRIPTION: Convert string to uppercase
*
* NOTE: This is not a POSIX function, so it appears here, not in utclib.c
*
******************************************************************************/
void
AcpiUtStrupr (
char *SrcString)
{
char *String;
ACPI_FUNCTION_ENTRY ();
if (!SrcString)
{
return;
}
/* Walk entire string, uppercasing the letters */
for (String = SrcString; *String; String++)
{
*String = (char) ACPI_TOUPPER (*String);
}
return;
}
/*******************************************************************************
*
* FUNCTION: AcpiUtStrtoul64
*
* PARAMETERS: String - Null terminated string
* Base - Radix of the string: 16 or ACPI_ANY_BASE;
* ACPI_ANY_BASE means 'in behalf of ToInteger'
* RetInteger - Where the converted integer is returned
*
* RETURN: Status and Converted value
*
* DESCRIPTION: Convert a string into an unsigned value. Performs either a
* 32-bit or 64-bit conversion, depending on the current mode
* of the interpreter.
* NOTE: Does not support Octal strings, not needed.
*
******************************************************************************/
ACPI_STATUS
AcpiUtStrtoul64 (
char *String,
UINT32 Base,
UINT64 *RetInteger)
{
UINT32 ThisDigit = 0;
UINT64 ReturnValue = 0;
UINT64 Quotient;
UINT64 Dividend;
UINT32 ToIntegerOp = (Base == ACPI_ANY_BASE);
UINT32 Mode32 = (AcpiGbl_IntegerByteWidth == 4);
UINT8 ValidDigits = 0;
UINT8 SignOf0x = 0;
UINT8 Term = 0;
ACPI_FUNCTION_TRACE_STR (UtStroul64, String);
switch (Base)
{
case ACPI_ANY_BASE:
case 16:
break;
default:
/* Invalid Base */
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (!String)
{
goto ErrorExit;
}
/* Skip over any white space in the buffer */
while ((*String) && (ACPI_IS_SPACE (*String) || *String == '\t'))
{
String++;
}
if (ToIntegerOp)
{
/*
* Base equal to ACPI_ANY_BASE means 'ToInteger operation case'.
* We need to determine if it is decimal or hexadecimal.
*/
if ((*String == '0') && (ACPI_TOLOWER (*(String + 1)) == 'x'))
{
SignOf0x = 1;
Base = 16;
/* Skip over the leading '0x' */
String += 2;
}
else
{
Base = 10;
}
}
/* Any string left? Check that '0x' is not followed by white space. */
if (!(*String) || ACPI_IS_SPACE (*String) || *String == '\t')
{
if (ToIntegerOp)
{
goto ErrorExit;
}
else
{
goto AllDone;
}
}
/*
* Perform a 32-bit or 64-bit conversion, depending upon the current
* execution mode of the interpreter
*/
Dividend = (Mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;
/* Main loop: convert the string to a 32- or 64-bit integer */
while (*String)
{
if (ACPI_IS_DIGIT (*String))
{
/* Convert ASCII 0-9 to Decimal value */
ThisDigit = ((UINT8) *String) - '0';
}
else if (Base == 10)
{
/* Digit is out of range; possible in ToInteger case only */
Term = 1;
}
else
{
ThisDigit = (UINT8) ACPI_TOUPPER (*String);
if (ACPI_IS_XDIGIT ((char) ThisDigit))
{
/* Convert ASCII Hex char to value */
ThisDigit = ThisDigit - 'A' + 10;
}
else
{
Term = 1;
}
}
if (Term)
{
if (ToIntegerOp)
{
goto ErrorExit;
}
else
{
break;
}
}
else if ((ValidDigits == 0) && (ThisDigit == 0) && !SignOf0x)
{
/* Skip zeros */
String++;
continue;
}
ValidDigits++;
if (SignOf0x && ((ValidDigits > 16) || ((ValidDigits > 8) && Mode32)))
{
/*
* This is ToInteger operation case.
* No any restrictions for string-to-integer conversion,
* see ACPI spec.
*/
goto ErrorExit;
}
/* Divide the digit into the correct position */
(void) AcpiUtShortDivide ((Dividend - (UINT64) ThisDigit),
Base, &Quotient, NULL);
if (ReturnValue > Quotient)
{
if (ToIntegerOp)
{
goto ErrorExit;
}
else
{
break;
}
}
ReturnValue *= Base;
ReturnValue += ThisDigit;
String++;
}
/* All done, normal exit */
AllDone:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
ACPI_FORMAT_UINT64 (ReturnValue)));
*RetInteger = ReturnValue;
return_ACPI_STATUS (AE_OK);
ErrorExit:
/* Base was set/validated above */
if (Base == 10)
{
return_ACPI_STATUS (AE_BAD_DECIMAL_CONSTANT);
}
else
{
return_ACPI_STATUS (AE_BAD_HEX_CONSTANT);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiUtPrintString
*
* PARAMETERS: String - Null terminated ASCII string
* MaxLength - Maximum output length. Used to constrain the
* length of strings during debug output only.
*
* RETURN: None
*
* DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
* sequences.
*
******************************************************************************/
void
AcpiUtPrintString (
char *String,
UINT16 MaxLength)
{
UINT32 i;
if (!String)
{
AcpiOsPrintf ("<\"NULL STRING PTR\">");
return;
}
AcpiOsPrintf ("\"");
for (i = 0; String[i] && (i < MaxLength); i++)
{
/* Escape sequences */
switch (String[i])
{
case 0x07:
AcpiOsPrintf ("\\a"); /* BELL */
break;
case 0x08:
AcpiOsPrintf ("\\b"); /* BACKSPACE */
break;
case 0x0C:
AcpiOsPrintf ("\\f"); /* FORMFEED */
break;
case 0x0A:
AcpiOsPrintf ("\\n"); /* LINEFEED */
break;
case 0x0D:
AcpiOsPrintf ("\\r"); /* CARRIAGE RETURN*/
break;
case 0x09:
AcpiOsPrintf ("\\t"); /* HORIZONTAL TAB */
break;
case 0x0B:
AcpiOsPrintf ("\\v"); /* VERTICAL TAB */
break;
case '\'': /* Single Quote */
case '\"': /* Double Quote */
case '\\': /* Backslash */
AcpiOsPrintf ("\\%c", (int) String[i]);
break;
default:
/* Check for printable character or hex escape */
if (ACPI_IS_PRINT (String[i]))
{
/* This is a normal character */
AcpiOsPrintf ("%c", (int) String[i]);
}
else
{
/* All others will be Hex escapes */
AcpiOsPrintf ("\\x%2.2X", (INT32) String[i]);
}
break;
}
}
AcpiOsPrintf ("\"");
if (i == MaxLength && String[i])
{
AcpiOsPrintf ("...");
}
}
/*******************************************************************************
*
* FUNCTION: AcpiUtValidAcpiChar
*
* 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
*
******************************************************************************/
BOOLEAN
AcpiUtValidAcpiChar (
char Character,
UINT32 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: AcpiUtValidAcpiName
*
* PARAMETERS: Name - The name to be examined. Does not have to
* be NULL terminated string.
*
* RETURN: TRUE if the name is valid, FALSE otherwise
*
* DESCRIPTION: Check for a valid ACPI name. Each character must be one of:
* 1) Upper case alpha
* 2) numeric
* 3) underscore
*
******************************************************************************/
BOOLEAN
AcpiUtValidAcpiName (
char *Name)
{
UINT32 i;
ACPI_FUNCTION_ENTRY ();
for (i = 0; i < ACPI_NAME_SIZE; i++)
{
if (!AcpiUtValidAcpiChar (Name[i], i))
{
return (FALSE);
}
}
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtRepairName
*
* PARAMETERS: Name - The ACPI name to be repaired
*
* RETURN: Repaired version of the name
*
* DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and
* return the new name. NOTE: the Name parameter must reside in
* read/write memory, cannot be a const.
*
* An ACPI Name must consist of valid ACPI characters. We will repair the name
* if necessary because we don't want to abort because of this, but we want
* all namespace names to be printable. A warning message is appropriate.
*
* This issue came up because there are in fact machines that exhibit
* this problem, and we want to be able to enable ACPI support for them,
* even though there are a few bad names.
*
******************************************************************************/
void
AcpiUtRepairName (
char *Name)
{
UINT32 i;
BOOLEAN FoundBadChar = FALSE;
UINT32 OriginalName;
ACPI_FUNCTION_NAME (UtRepairName);
ACPI_MOVE_NAME (&OriginalName, Name);
/* Check each character in the name */
for (i = 0; i < ACPI_NAME_SIZE; i++)
{
if (AcpiUtValidAcpiChar (Name[i], i))
{
continue;
}
/*
* Replace a bad character with something printable, yet technically
* still invalid. This prevents any collisions with existing "good"
* names in the namespace.
*/
Name[i] = '*';
FoundBadChar = TRUE;
}
if (FoundBadChar)
{
/* Report warning only if in strict mode or debug mode */
if (!AcpiGbl_EnableInterpreterSlack)
{
ACPI_WARNING ((AE_INFO,
"Invalid character(s) in name (0x%.8X), repaired: [%4.4s]",
OriginalName, Name));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Invalid character(s) in name (0x%.8X), repaired: [%4.4s]",
OriginalName, Name));
}
}
}
#if defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP
/*******************************************************************************
*
* FUNCTION: UtConvertBackslashes
*
* PARAMETERS: Pathname - File pathname string to be converted
*
* RETURN: Modifies the input Pathname
*
* DESCRIPTION: Convert all backslashes (0x5C) to forward slashes (0x2F) within
* the entire input file pathname string.
*
******************************************************************************/
void
UtConvertBackslashes (
char *Pathname)
{
if (!Pathname)
{
return;
}
while (*Pathname)
{
if (*Pathname == '\\')
{
*Pathname = '/';
}
Pathname++;
}
}
#endif
|