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 *

 * Module Name: exnames - interpreter/scanner name load/execute

 *

 *****************************************************************************/

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2011, 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

 * documentation and/or other materials provided with distribution.  In

 * 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

 * provision in the documentation and/or other materials provided with the

 * 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

 * ensure that the distribution and export/re-export of the software is in

 * compliance with all laws, regulations, orders, or other restrictions of the

 * U.S. Export Administration Regulations. Licensee agrees that neither it nor

 * any of its subsidiaries will export/re-export any technical data, process,

 * 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.

 *

 *****************************************************************************/

#include "accommon.h"

#include "acinterp.h"

#include "amlcode.h"

        ACPI_MODULE_NAME    ("exnames")

AcpiExAllocateNameString (

    UINT32                  PrefixCount,

    UINT32                  NumNameSegs);

AcpiExNameSegment (

    UINT8                   **InAmlAddress,

    char                    *NameString);

 *

 * FUNCTION:    AcpiExAllocateNameString

 *

 * PARAMETERS:  PrefixCount         - Count of parent levels. Special cases:

 *                                    (-1)==root,  0==none

 *              NumNameSegs         - count of 4-character name segments

 *

 * RETURN:      A pointer to the allocated string segment.  This segment must

 *              be deleted by the caller.

 *

 * DESCRIPTION: Allocate a buffer for a name string. Ensure allocated name

 *              string is long enough, and set up prefix if any.

 *

 ******************************************************************************/

AcpiExAllocateNameString (

    UINT32                  PrefixCount,

    UINT32                  NumNameSegs)

{

    char                    *TempPtr;

    char                    *NameString;

    UINT32                   SizeNeeded;

     * Allow room for all \ and ^ prefixes, all segments and a MultiNamePrefix.

     * Also, one byte for the null terminator.

     * This may actually be somewhat longer than needed.

     */

    if (PrefixCount == ACPI_UINT32_MAX)

    {

        /* Special case for root */

    }

    else

    {

        SizeNeeded = PrefixCount + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1;

    }

     * Allocate a buffer for the name.

     * This buffer must be deleted by the caller!

     */

    NameString = ACPI_ALLOCATE (SizeNeeded);

    if (!NameString)

    {

        ACPI_ERROR ((AE_INFO,

            "Could not allocate size %u", SizeNeeded));

        return_PTR (NULL);

    }

    {

        *TempPtr++ = AML_ROOT_PREFIX;

    }

    else

    {

        while (PrefixCount--)

        {

            *TempPtr++ = AML_PARENT_PREFIX;

        }

    }

    {

        /* Set up multi prefixes   */

        *TempPtr++ = (char) NumNameSegs;

    }

    else if (2 == NumNameSegs)

    {

        /* Set up dual prefixes */

    }

     * Terminate string following prefixes. AcpiExNameSegment() will

     * append the segment(s)

     */

    *TempPtr = 0;

}

 *

 * FUNCTION:    AcpiExNameSegment

 *

 * PARAMETERS:  InAmlAddress    - Pointer to the name in the AML code

 *              NameString      - Where to return the name. The name is appended

 *                                to any existing string to form a namepath

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Extract an ACPI name (4 bytes) from the AML byte stream

 *

 ******************************************************************************/

AcpiExNameSegment (

    UINT8                   **InAmlAddress,

    char                    *NameString)

{

    char                    *AmlAddress = (void *) *InAmlAddress;

    ACPI_STATUS             Status = AE_OK;

    UINT32                  Index;

    char                    CharBuf[5];

     * If first character is a digit, then we know that we aren't looking at a

     * valid name segment

     */

    CharBuf[0] = *AmlAddress;

    {

        ACPI_ERROR ((AE_INFO, "Invalid leading digit: %c", CharBuf[0]));

        return_ACPI_STATUS (AE_CTRL_PENDING);

    }

        (Index < ACPI_NAME_SIZE) && (AcpiUtValidAcpiChar (*AmlAddress, 0));

        Index++)

    {

        CharBuf[Index] = *AmlAddress++;

        ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "%c\n", CharBuf[Index]));

    }

    {

        /* Found 4 valid characters */

        {

            ACPI_STRCAT (NameString, CharBuf);

            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                "Appended to - %s\n", NameString));

        }

        else

        {

            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                "No Name string - %s\n", CharBuf));

        }

    }

    else if (Index == 0)

    {

        /*

         * First character was not a valid name character,

         * so we are looking at something other than a name.

         */

        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,

            "Leading character is not alpha: %02Xh (not a name)\n",

            CharBuf[0]));

        Status = AE_CTRL_PENDING;

    }

    else

    {

        /*

         * Segment started with one or more valid characters, but fewer than

         * the required 4

         */

        Status = AE_AML_BAD_NAME;

        ACPI_ERROR ((AE_INFO,

            "Bad character 0x%02x in name, at %p",

            *AmlAddress, AmlAddress));

    }

    return_ACPI_STATUS (Status);

}

 *

 * FUNCTION:    AcpiExGetNameString

 *

 * PARAMETERS:  DataType            - Object type to be associated with this

 *                                    name

 *              InAmlAddress        - Pointer to the namestring in the AML code

 *              OutNameString       - Where the namestring is returned

 *              OutNameLength       - Length of the returned string

 *

 * RETURN:      Status, namestring and length

 *

 * DESCRIPTION: Extract a full namepath from the AML byte stream,

 *              including any prefixes.

 *

 ******************************************************************************/

AcpiExGetNameString (

    ACPI_OBJECT_TYPE        DataType,

    UINT8                   *InAmlAddress,

    char                    **OutNameString,

    UINT32                  *OutNameLength)

{

    ACPI_STATUS             Status = AE_OK;

    UINT8                   *AmlAddress = InAmlAddress;

    char                    *NameString = NULL;

    UINT32                  NumSegments;

    UINT32                  PrefixCount = 0;

    BOOLEAN                 HasPrefix = FALSE;

        ACPI_TYPE_LOCAL_BANK_FIELD == DataType     ||

        ACPI_TYPE_LOCAL_INDEX_FIELD == DataType)

    {

        /* Disallow prefixes for types associated with FieldUnit names */

        if (!NameString)

        {

            Status = AE_NO_MEMORY;

        }

        else

        {

            Status = AcpiExNameSegment (&AmlAddress, NameString);

        }

    }

    else

    {

        /*

         * DataType is not a field name.

         * Examine first character of name for root or parent prefix operators

         */

        switch (*AmlAddress)

        {

        case AML_ROOT_PREFIX:

                AmlAddress));

             * Remember that we have a RootPrefix --

             * see comment in AcpiExAllocateNameString()

             */

            AmlAddress++;

            PrefixCount = ACPI_UINT32_MAX;

            HasPrefix = TRUE;

            break;

            {

                ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "ParentPrefix (^) at %p\n",

                    AmlAddress));

                PrefixCount++;

            break;

        }

        {

        case AML_DUAL_NAME_PREFIX:

                AmlAddress));

            NameString = AcpiExAllocateNameString (PrefixCount, 2);

            if (!NameString)

            {

                Status = AE_NO_MEMORY;

                break;

            }

            if (ACPI_SUCCESS (Status))

            {

                Status = AcpiExNameSegment (&AmlAddress, NameString);

            }

            break;

                AmlAddress));

            NumSegments = *AmlAddress;

            if (!NameString)

            {

                Status = AE_NO_MEMORY;

                break;

            }

            HasPrefix = TRUE;

                    (Status = AcpiExNameSegment (&AmlAddress, NameString)) ==

                        AE_OK)

            {

                NumSegments--;

            }

            {

                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

                    "NameSeg is \"\\\" followed by NULL\n"));

            }

            NameString = AcpiExAllocateNameString (PrefixCount, 0);

            if (!NameString)

            {

                Status = AE_NO_MEMORY;

                break;

            }

            if (!NameString)

            {

                Status = AE_NO_MEMORY;

                break;

            }

            break;

        }

    }

    {

        /* Ran out of segments after processing a prefix */

            "Malformed Name at %p", NameString));

        Status = AE_AML_BAD_NAME;

    }

    {

        if (NameString)

        {

            ACPI_FREE (NameString);

        }

        return_ACPI_STATUS (Status);

    }

    *OutNameLength = (UINT32) (AmlAddress - InAmlAddress);

}