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 /******************************************************************************
  *
  * Module Name: exconvrt - Object conversion routines
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2024, 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.
  *
  *****************************************************************************
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * following license:
  *
  * 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.
  *
  * 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 MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * 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 DAMAGE.
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  *****************************************************************************/
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acinterp.h"
 #include "amlcode.h"
 
 
 #define _COMPONENT          ACPI_EXECUTER
         ACPI_MODULE_NAME    ("exconvrt")
 
 /* Local prototypes */
 
 static UINT32
 AcpiExConvertToAscii (
     UINT64                  Integer,
     UINT16                  Base,
     UINT8                   *String,
     UINT8                   MaxLength,
     BOOLEAN                 LeadingZeros);
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExConvertToInteger
  *
  * PARAMETERS:  ObjDesc             - Object to be converted. Must be an
  *                                    Integer, Buffer, or String
  *              ResultDesc          - Where the new Integer object is returned
  *              ImplicitConversion  - Used for string conversion
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Convert an ACPI Object to an integer.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExConvertToInteger (
     ACPI_OPERAND_OBJECT     *ObjDesc,
     ACPI_OPERAND_OBJECT     **ResultDesc,
     UINT32                  ImplicitConversion)
 {
     ACPI_OPERAND_OBJECT     *ReturnDesc;
     UINT8                   *Pointer;
     UINT64                  Result;
     UINT32                  i;
     UINT32                  Count;
 
 
     ACPI_FUNCTION_TRACE_PTR (ExConvertToInteger, ObjDesc);
 
 
     switch (ObjDesc->Common.Type)
     {
     case ACPI_TYPE_INTEGER:
 
         /* No conversion necessary */
 
         *ResultDesc = ObjDesc;
         return_ACPI_STATUS (AE_OK);
 
     case ACPI_TYPE_BUFFER:
     case ACPI_TYPE_STRING:
 
         /* Note: Takes advantage of common buffer/string fields */
 
         Pointer = ObjDesc->Buffer.Pointer;
         Count   = ObjDesc->Buffer.Length;
         break;
 
     default:
 
         return_ACPI_STATUS (AE_TYPE);
     }
 
     /*
      * Convert the buffer/string to an integer. Note that both buffers and
      * 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 (ObjDesc->Common.Type)
     {
     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").
          *
          * Explicit conversion is used only by ToInteger.
          * All other string-to-integer conversions are implicit conversions.
          */
         if (ImplicitConversion)
         {
             Result = AcpiUtImplicitStrtoul64 (ACPI_CAST_PTR (char, Pointer));
         }
         else
         {
             Result = AcpiUtExplicitStrtoul64 (ACPI_CAST_PTR (char, Pointer));
         }
         break;
 
     case ACPI_TYPE_BUFFER:
 
         /* Check for zero-length buffer */
 
         if (!Count)
         {
             return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
         }
 
         /* Transfer no more than an integer's worth of data */
 
         if (Count > AcpiGbl_IntegerByteWidth)
         {
             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
              */
             Result |= (((UINT64) Pointer[i]) << (i * 8));
         }
         break;
 
     default:
 
         /* No other types can get here */
 
         break;
     }
 
     /* Create a new integer */
 
     ReturnDesc = AcpiUtCreateIntegerObject (Result);
     if (!ReturnDesc)
     {
         return_ACPI_STATUS (AE_NO_MEMORY);
     }
 
     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
         ACPI_FORMAT_UINT64 (Result)));
 
     /* Save the Result */
 
     (void) AcpiExTruncateFor32bitTable (ReturnDesc);
     *ResultDesc = ReturnDesc;
     return_ACPI_STATUS (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * 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
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExConvertToBuffer (
     ACPI_OPERAND_OBJECT     *ObjDesc,
     ACPI_OPERAND_OBJECT     **ResultDesc)
 {
     ACPI_OPERAND_OBJECT     *ReturnDesc;
     UINT8                   *NewBuf;
 
 
     ACPI_FUNCTION_TRACE_PTR (ExConvertToBuffer, ObjDesc);
 
 
     switch (ObjDesc->Common.Type)
     {
     case ACPI_TYPE_BUFFER:
 
         /* No conversion necessary */
 
         *ResultDesc = ObjDesc;
         return_ACPI_STATUS (AE_OK);
 
 
     case ACPI_TYPE_INTEGER:
         /*
          * Create a new Buffer object.
          * Need enough space for one integer
          */
         ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth);
         if (!ReturnDesc)
         {
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
 
         /* Copy the integer to the buffer, LSB first */
 
         NewBuf = ReturnDesc->Buffer.Pointer;
         memcpy (NewBuf, &ObjDesc->Integer.Value, AcpiGbl_IntegerByteWidth);
         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
          * ASL/AML code that depends on the null being transferred to the new
          * buffer.
          */
         ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE)
             ObjDesc->String.Length + 1);
         if (!ReturnDesc)
         {
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
 
         /* Copy the string to the buffer */
 
         NewBuf = ReturnDesc->Buffer.Pointer;
         strncpy ((char *) NewBuf, (char *) ObjDesc->String.Pointer,
             ObjDesc->String.Length);
         break;
 
     default:
 
         return_ACPI_STATUS (AE_TYPE);
     }
 
     /* Mark buffer initialized */
 
     ReturnDesc->Common.Flags |= AOPOBJ_DATA_VALID;
     *ResultDesc = ReturnDesc;
     return_ACPI_STATUS (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * 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
  *              LeadingZeros    - Allow leading zeros
  *
  * RETURN:      Actual string length
  *
  * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
  *
  ******************************************************************************/
 
 static UINT32
 AcpiExConvertToAscii (
     UINT64                  Integer,
     UINT16                  Base,
     UINT8                   *String,
     UINT8                   DataWidth,
     BOOLEAN                 LeadingZeros)
 {
     UINT64                  Digit;
     UINT32                  i;
     UINT32                  j;
     UINT32                  k = 0;
     UINT32                  HexLength;
     UINT32                  DecimalLength;
     UINT32                  Remainder;
     BOOLEAN                 SupressZeros = !LeadingZeros;
     UINT8                   HexChar;
 
 
     ACPI_FUNCTION_ENTRY ();
 
 
     switch (Base)
     {
     case 10:
 
         /* Setup max length for the decimal number */
 
         switch (DataWidth)
         {
         case 1:
 
             DecimalLength = ACPI_MAX8_DECIMAL_DIGITS;
             break;
 
         case 4:
 
             DecimalLength = ACPI_MAX32_DECIMAL_DIGITS;
             break;
 
         case 8:
         default:
 
             DecimalLength = ACPI_MAX64_DECIMAL_DIGITS;
             break;
         }
 
         Remainder = 0;
 
         for (i = DecimalLength; i > 0; i--)
         {
             /* Divide by nth factor of 10 */
 
             Digit = Integer;
             for (j = 0; j < i; j++)
             {
                 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder);
             }
 
             /* Handle leading zeros */
 
             if (Remainder != 0)
             {
                 SupressZeros = FALSE;
             }
 
             if (!SupressZeros)
             {
                 String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder);
                 k++;
             }
         }
         break;
 
     case 16:
 
         /* HexLength: 2 ascii hex chars per data byte */
 
         HexLength = (DataWidth * 2);
         for (i = 0, j = (HexLength-1); i < HexLength; i++, j--)
         {
             /* Get one hex digit, most significant digits first */
 
             HexChar = (UINT8)
                 AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j));
 
             /* Supress leading zeros until the first non-zero character */
 
             if (HexChar == ACPI_ASCII_ZERO && SupressZeros)
             {
                 continue;
             }
 
             SupressZeros = FALSE;
             String[k] = HexChar;
             k++;
         }
         break;
 
     default:
         return (0);
     }
 
     /*
      * Since leading zeros are suppressed, 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. Supports both implicit
  *              and explicit conversions and related rules.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExConvertToString (
     ACPI_OPERAND_OBJECT     *ObjDesc,
     ACPI_OPERAND_OBJECT     **ResultDesc,
     UINT32                  Type)
 {
     ACPI_OPERAND_OBJECT     *ReturnDesc;
     UINT8                   *NewBuf;
     UINT32                  i;
     UINT32                  StringLength = 0;
     UINT16                  Base = 16;
     UINT8                   Separator = ',';
     BOOLEAN                 LeadingZeros;
 
 
     ACPI_FUNCTION_TRACE_PTR (ExConvertToString, ObjDesc);
 
 
     switch (ObjDesc->Common.Type)
     {
     case ACPI_TYPE_STRING:
 
         /* No conversion necessary */
 
         *ResultDesc = ObjDesc;
         return_ACPI_STATUS (AE_OK);
 
     case ACPI_TYPE_INTEGER:
 
         switch (Type)
         {
         case ACPI_EXPLICIT_CONVERT_DECIMAL:
             /*
              * From ToDecimalString, integer source.
              *
              * Make room for the maximum decimal number size
              */
             StringLength = ACPI_MAX_DECIMAL_DIGITS;
             LeadingZeros = FALSE;
             Base = 10;
             break;
 
         case ACPI_EXPLICIT_CONVERT_HEX:
             /*
              * From ToHexString.
              *
              * Supress leading zeros and append "0x"
              */
             StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth) + 2;
             LeadingZeros = FALSE;
             break;
         default:
 
             /* Two hex string characters for each integer byte */
 
             StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth);
             LeadingZeros = TRUE;
             break;
         }
 
         /*
          * Create a new String
          * Need enough space for one ASCII integer (plus null terminator)
          */
         ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
         if (!ReturnDesc)
         {
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
 
         NewBuf = ReturnDesc->Buffer.Pointer;
         if (Type == ACPI_EXPLICIT_CONVERT_HEX)
         {
             /* Append "0x" prefix for explicit hex conversion */
 
             *NewBuf++ = '0';
             *NewBuf++ = 'x';
         }
 
         /* Convert integer to string */
 
         StringLength = AcpiExConvertToAscii (
             ObjDesc->Integer.Value, Base, NewBuf, AcpiGbl_IntegerByteWidth, LeadingZeros);
 
         /* Null terminate at the correct place */
 
         ReturnDesc->String.Length = StringLength;
         if (Type == ACPI_EXPLICIT_CONVERT_HEX)
         {
             /* Take "0x" prefix into account */
 
             ReturnDesc->String.Length += 2;
         }
 
         NewBuf [StringLength] = 0;
         break;
 
     case ACPI_TYPE_BUFFER:
 
         /* Setup string length, base, and separator */
 
         switch (Type)
         {
         case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */
             /*
              * Explicit conversion from the ToDecimalString ASL operator.
              *
              * From ACPI: "If the input is a buffer, it is converted to a
              * a string of decimal values separated by commas."
              */
             LeadingZeros = FALSE;
             Base = 10;
 
             /*
              * Calculate the final string length. Individual string values
              * are variable length (include separator for each)
              */
             for (i = 0; i < ObjDesc->Buffer.Length; i++)
             {
                 if (ObjDesc->Buffer.Pointer[i] >= 100)
                 {
                     StringLength += 4;
                 }
                 else if (ObjDesc->Buffer.Pointer[i] >= 10)
                 {
                     StringLength += 3;
                 }
                 else
                 {
                     StringLength += 2;
                 }
             }
             break;
 
         case ACPI_IMPLICIT_CONVERT_HEX:
             /*
              * Implicit buffer-to-string conversion
              *
              * 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."
              *
              * Each hex number is prefixed with 0x (11/2018)
              */
             LeadingZeros = TRUE;
             Separator = ' ';
             StringLength = (ObjDesc->Buffer.Length * 5);
             break;
 
         case ACPI_EXPLICIT_CONVERT_HEX:
             /*
              * Explicit conversion from the ToHexString ASL operator.
              *
              * From ACPI: "If Data is a buffer, it is converted to a string of
              * hexadecimal values separated by commas."
              *
              * Each hex number is prefixed with 0x (11/2018)
              */
             LeadingZeros = TRUE;
             Separator = ',';
             StringLength = (ObjDesc->Buffer.Length * 5);
             break;
 
         default:
             return_ACPI_STATUS (AE_BAD_PARAMETER);
         }
 
         /*
          * Create a new string object and string buffer
          * (-1 because of extra separator included in StringLength from above)
          * Allow creation of zero-length strings from zero-length buffers.
          */
         if (StringLength)
         {
             StringLength--;
         }
 
         ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
         if (!ReturnDesc)
         {
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
 
         NewBuf = ReturnDesc->Buffer.Pointer;
 
         /*
          * Convert buffer bytes to hex or decimal values
          * (separated by commas or spaces)
          */
         for (i = 0; i < ObjDesc->Buffer.Length; i++)
         {
             if (Base == 16)
             {
                 /* Emit 0x prefix for explicit/implicit hex conversion */
 
                 *NewBuf++ = '0';
                 *NewBuf++ = 'x';
             }
 
             NewBuf += AcpiExConvertToAscii (
                 (UINT64) ObjDesc->Buffer.Pointer[i], Base, NewBuf, 1, LeadingZeros);
 
             /* Each digit is separated by either a comma or space */
 
             *NewBuf++ = Separator;
         }
 
         /*
          * Null terminate the string
          * (overwrites final comma/space from above)
          */
         if (ObjDesc->Buffer.Length)
         {
             NewBuf--;
         }
         *NewBuf = 0;
         break;
 
     default:
 
         return_ACPI_STATUS (AE_TYPE);
     }
 
     *ResultDesc = ReturnDesc;
     return_ACPI_STATUS (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * 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_STATUS
 AcpiExConvertToTargetType (
     ACPI_OBJECT_TYPE        DestinationType,
     ACPI_OPERAND_OBJECT     *SourceDesc,
     ACPI_OPERAND_OBJECT     **ResultDesc,
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_STATUS             Status = AE_OK;
 
 
     ACPI_FUNCTION_TRACE (ExConvertToTargetType);
 
 
     /* Default behavior */
 
     *ResultDesc = SourceDesc;
 
     /*
      * If required by the target,
      * perform implicit conversion on the source before we store it.
      */
     switch (GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs))
     {
     case ARGI_SIMPLE_TARGET:
     case ARGI_FIXED_TARGET:
     case ARGI_INTEGER_REF:      /* Handles Increment, Decrement cases */
 
         switch (DestinationType)
         {
         case ACPI_TYPE_LOCAL_REGION_FIELD:
             /*
              * Named field can always handle conversions
              */
             break;
 
         default:
 
             /* No conversion allowed for these types */
 
             if (DestinationType != SourceDesc->Common.Type)
             {
                 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                     "Explicit operator, will store (%s) over existing type (%s)\n",
                     AcpiUtGetObjectTypeName (SourceDesc),
                     AcpiUtGetTypeName (DestinationType)));
                 Status = AE_TYPE;
             }
         }
         break;
 
     case ARGI_TARGETREF:
     case ARGI_STORE_TARGET:
 
         switch (DestinationType)
         {
         case ACPI_TYPE_INTEGER:
         case ACPI_TYPE_BUFFER_FIELD:
         case ACPI_TYPE_LOCAL_BANK_FIELD:
         case ACPI_TYPE_LOCAL_INDEX_FIELD:
             /*
              * These types require an Integer operand. We can convert
              * a Buffer or a String to an Integer if necessary.
              */
             Status = AcpiExConvertToInteger (SourceDesc, ResultDesc,
                 ACPI_IMPLICIT_CONVERSION);
             break;
 
         case ACPI_TYPE_STRING:
             /*
              * The operand must be a String. We can convert an
              * Integer or Buffer if necessary
              */
             Status = AcpiExConvertToString (SourceDesc, ResultDesc,
                 ACPI_IMPLICIT_CONVERT_HEX);
             break;
 
         case ACPI_TYPE_BUFFER:
             /*
              * The operand must be a Buffer. We can convert an
              * Integer or String if necessary
              */
             Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc);
             break;
 
         default:
 
             ACPI_ERROR ((AE_INFO,
                 "Bad destination type during conversion: 0x%X",
                 DestinationType));
             Status = AE_AML_INTERNAL;
             break;
         }
         break;
 
     case ARGI_REFERENCE:
         /*
          * CreateXxxxField cases - we are storing the field object into the name
          */
         break;
 
     default:
 
         ACPI_ERROR ((AE_INFO,
             "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s",
             GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs),
             WalkState->Opcode, AcpiUtGetTypeName (DestinationType)));
         Status = AE_AML_INTERNAL;
     }
 
     /*
      * 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.
      */
     if (Status == AE_TYPE)
     {
         Status = AE_OK;
     }
 
     return_ACPI_STATUS (Status);
 }

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