exconvrt.c revision 186507a7cf6e4b4155e9ef89631777a96633ac0e
/******************************************************************************
*
* Module Name: exconvrt - Object conversion routines
* $Revision: 1.67 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2005, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __EXCONVRT_C__
#include "acpi.h"
#include "acinterp.h"
#include "amlcode.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exconvrt")
/* Local prototypes */
static UINT32
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToInteger
*
* PARAMETERS: ObjDesc - Object to be converted. Must be an
* Integer, Buffer, or String
* ResultDesc - Where the new Integer object is returned
* Flags - Used for string conversion
*
* RETURN: Status
*
* DESCRIPTION: Convert an ACPI Object to an integer.
*
******************************************************************************/
{
UINT32 i;
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_INTEGER:
/* No conversion necessary */
*ResultDesc = ObjDesc;
case ACPI_TYPE_BUFFER:
case ACPI_TYPE_STRING:
break;
default:
}
/*
* strings are treated as raw data - we don't convert ascii to hex for
* strings.
*
* There are two terminating conditions for the loop:
* 1) The size of an integer has been reached, or
* 2) The end of the buffer or string has been reached
*/
Result = 0;
/* String conversion is different than Buffer conversion */
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_STRING:
/*
* Convert string to an integer - for most cases, the string must be
* hexadecimal as per the ACPI specification. The only exception (as
* of ACPI 3.0) is that the ToInteger() operator allows both decimal
* and hexadecimal strings (hex prefixed with "0x").
*/
if (ACPI_FAILURE (Status))
{
}
break;
case ACPI_TYPE_BUFFER:
/* Check for zero-length buffer */
if (!Count)
{
}
/* Transfer no more than an integer's worth of data */
if (Count > AcpiGbl_IntegerByteWidth)
{
}
/*
* Convert buffer to an integer - we simply grab enough raw data
* from the buffer to fill an integer
*/
for (i = 0; i < Count; i++)
{
/*
* Get next byte and shift it into the Result.
* Little endian is used, meaning that the first byte of the buffer
* is the LSB of the integer
*/
}
break;
default:
/* No other types can get here */
break;
}
/* Create a new integer */
if (!ReturnDesc)
{
}
/* Save the Result */
*ResultDesc = ReturnDesc;
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToBuffer
*
* PARAMETERS: ObjDesc - Object to be converted. Must be an
* Integer, Buffer, or String
* ResultDesc - Where the new buffer object is returned
*
* RETURN: Status
*
* DESCRIPTION: Convert an ACPI Object to a Buffer
*
******************************************************************************/
{
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_BUFFER:
/* No conversion necessary */
*ResultDesc = ObjDesc;
case ACPI_TYPE_INTEGER:
/*
* Create a new Buffer object.
* Need enough space for one integer
*/
if (!ReturnDesc)
{
}
/* Copy the integer to the buffer, LSB first */
break;
case ACPI_TYPE_STRING:
/*
* Create a new Buffer object
* Size will be the string length
*
* NOTE: Add one to the string length to include the null terminator.
* The ACPI spec is unclear on this subject, but there is existing
* buffer.
*/
if (!ReturnDesc)
{
}
/* Copy the string to the buffer */
break;
default:
}
/* Mark buffer initialized */
*ResultDesc = ReturnDesc;
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToAscii
*
* PARAMETERS: Integer - Value to be converted
* Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX
* String - Where the string is returned
* DataWidth - Size of data item to be converted, in bytes
*
* RETURN: Actual string length
*
* DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
*
******************************************************************************/
static UINT32
{
ACPI_NATIVE_UINT k = 0;
switch (Base)
{
case 10:
/* Setup max length for the decimal number */
switch (DataWidth)
{
case 1:
break;
case 4:
break;
case 8:
default:
break;
}
Remainder = 0;
for (i = DecimalLength; i > 0; i--)
{
/* Divide by nth factor of 10 */
for (j = 0; j < i; j++)
{
}
/* Handle leading zeros */
if (Remainder != 0)
{
}
if (!SupressZeros)
{
k++;
}
}
break;
case 16:
/* HexLength: 2 ascii hex chars per data byte */
{
/* Get one hex digit, most significant digits first */
k++;
}
break;
default:
return (0);
}
/*
* Since leading zeros are supressed, we must check for the case where
* the integer equals 0
*
* Finally, null terminate the string and return the length
*/
if (!k)
{
String [0] = ACPI_ASCII_ZERO;
k = 1;
}
String [k] = 0;
return ((UINT32) k);
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToString
*
* PARAMETERS: ObjDesc - Object to be converted. Must be an
* Integer, Buffer, or String
* ResultDesc - Where the string object is returned
* Type - String flags (base and conversion type)
*
* RETURN: Status
*
* DESCRIPTION: Convert an ACPI Object to a string
*
******************************************************************************/
{
UINT32 i;
UINT32 StringLength = 0;
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_STRING:
/* No conversion necessary */
*ResultDesc = ObjDesc;
case ACPI_TYPE_INTEGER:
switch (Type)
{
/* Make room for maximum decimal number */
Base = 10;
break;
default:
/* Two hex string characters for each integer byte */
break;
}
/*
* Create a new String
* Need enough space for one ASCII integer (plus null terminator)
*/
if (!ReturnDesc)
{
}
/* Convert integer to string */
/* Null terminate at the correct place */
NewBuf [StringLength] = 0;
break;
case ACPI_TYPE_BUFFER:
/* Setup string length, base, and separator */
switch (Type)
{
case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */
/*
* From ACPI: "If Data is a buffer, it is converted to a string of
* decimal values separated by commas."
*/
Base = 10;
/*
* Calculate the final string length. Individual string values
* are variable length (include separator for each)
*/
{
{
StringLength += 4;
}
{
StringLength += 3;
}
else
{
StringLength += 2;
}
}
break;
/*
* From the ACPI spec:
*"The entire contents of the buffer are converted to a string of
* two-character hexadecimal numbers, each separated by a space."
*/
Separator = ' ';
break;
case ACPI_EXPLICIT_CONVERT_HEX: /* Used by ToHexString */
/*
* From ACPI: "If Data is a buffer, it is converted to a string of
* hexadecimal values separated by commas."
*/
break;
default:
}
/*
* Perform the conversion.
* (-1 because of extra separator included in StringLength from above)
*/
StringLength--;
{
}
/* Create a new string object and string buffer */
if (!ReturnDesc)
{
}
/*
* Convert buffer bytes to hex or decimal values
* (separated by commas or spaces)
*/
{
NewBuf, 1);
}
/*
* Null terminate the string
*/
NewBuf--;
*NewBuf = 0;
break;
default:
}
*ResultDesc = ReturnDesc;
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToTargetType
*
* PARAMETERS: DestinationType - Current type of the destination
* SourceDesc - Source object to be converted.
* ResultDesc - Where the converted object is returned
* WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Implements "implicit conversion" rules for storing an object.
*
******************************************************************************/
{
ACPI_FUNCTION_TRACE ("ExConvertToTargetType");
/* Default behavior */
*ResultDesc = SourceDesc;
/*
* If required by the target,
* perform implicit conversion on the source before we store it.
*/
{
case ARGI_SIMPLE_TARGET:
case ARGI_FIXED_TARGET:
case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */
switch (DestinationType)
{
/*
* Named field can always handle conversions
*/
break;
default:
/* No conversion allowed for these types */
{
"Explicit operator, will store (%s) over existing type (%s)\n",
}
}
break;
case ARGI_TARGETREF:
switch (DestinationType)
{
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_BUFFER_FIELD:
/*
* These types require an Integer operand. We can convert
* a Buffer or a String to an Integer if necessary.
*/
16);
break;
case ACPI_TYPE_STRING:
/*
* The operand must be a String. We can convert an
* Integer or Buffer if necessary
*/
break;
case ACPI_TYPE_BUFFER:
/*
* The operand must be a Buffer. We can convert an
* Integer or String if necessary
*/
break;
default:
ACPI_REPORT_ERROR (("Bad destination type during conversion: %X\n",
break;
}
break;
case ARGI_REFERENCE:
/*
* CreateXxxxField cases - we are storing the field object into the name
*/
break;
default:
"Unknown Target type ID 0x%X Op %s DestType %s\n",
ACPI_REPORT_ERROR (("Bad Target Type (ARGI): %X\n",
}
/*
* Source-to-Target conversion semantics:
*
* If conversion to the target type cannot be performed, then simply
* overwrite the target with the new object and type.
*/
{
}
}