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  1.  
  2. /******************************************************************************
  3.  *
  4.  * Module Name: asutils - common utilities
  5.  *
  6.  *****************************************************************************/
  7.  
  8. /******************************************************************************
  9.  *
  10.  * 1. Copyright Notice
  11.  *
  12.  * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
  13.  * All rights reserved.
  14.  *
  15.  * 2. License
  16.  *
  17.  * 2.1. This is your license from Intel Corp. under its intellectual property
  18.  * rights.  You may have additional license terms from the party that provided
  19.  * you this software, covering your right to use that party's intellectual
  20.  * property rights.
  21.  *
  22.  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  23.  * copy of the source code appearing in this file ("Covered Code") an
  24.  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  25.  * base code distributed originally by Intel ("Original Intel Code") to copy,
  26.  * make derivatives, distribute, use and display any portion of the Covered
  27.  * Code in any form, with the right to sublicense such rights; and
  28.  *
  29.  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  30.  * license (with the right to sublicense), under only those claims of Intel
  31.  * patents that are infringed by the Original Intel Code, to make, use, sell,
  32.  * offer to sell, and import the Covered Code and derivative works thereof
  33.  * solely to the minimum extent necessary to exercise the above copyright
  34.  * license, and in no event shall the patent license extend to any additions
  35.  * to or modifications of the Original Intel Code.  No other license or right
  36.  * is granted directly or by implication, estoppel or otherwise;
  37.  *
  38.  * The above copyright and patent license is granted only if the following
  39.  * conditions are met:
  40.  *
  41.  * 3. Conditions
  42.  *
  43.  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  44.  * Redistribution of source code of any substantial portion of the Covered
  45.  * Code or modification with rights to further distribute source must include
  46.  * the above Copyright Notice, the above License, this list of Conditions,
  47.  * and the following Disclaimer and Export Compliance provision.  In addition,
  48.  * Licensee must cause all Covered Code to which Licensee contributes to
  49.  * contain a file documenting the changes Licensee made to create that Covered
  50.  * Code and the date of any change.  Licensee must include in that file the
  51.  * documentation of any changes made by any predecessor Licensee.  Licensee
  52.  * must include a prominent statement that the modification is derived,
  53.  * directly or indirectly, from Original Intel Code.
  54.  *
  55.  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  56.  * Redistribution of source code of any substantial portion of the Covered
  57.  * Code or modification without rights to further distribute source must
  58.  * include the following Disclaimer and Export Compliance provision in the
  59.  * documentation and/or other materials provided with distribution.  In
  60.  * addition, Licensee may not authorize further sublicense of source of any
  61.  * portion of the Covered Code, and must include terms to the effect that the
  62.  * license from Licensee to its licensee is limited to the intellectual
  63.  * property embodied in the software Licensee provides to its licensee, and
  64.  * not to intellectual property embodied in modifications its licensee may
  65.  * make.
  66.  *
  67.  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  68.  * substantial portion of the Covered Code or modification must reproduce the
  69.  * above Copyright Notice, and the following Disclaimer and Export Compliance
  70.  * provision in the documentation and/or other materials provided with the
  71.  * distribution.
  72.  *
  73.  * 3.4. Intel retains all right, title, and interest in and to the Original
  74.  * Intel Code.
  75.  *
  76.  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  77.  * Intel shall be used in advertising or otherwise to promote the sale, use or
  78.  * other dealings in products derived from or relating to the Covered Code
  79.  * without prior written authorization from Intel.
  80.  *
  81.  * 4. Disclaimer and Export Compliance
  82.  *
  83.  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  84.  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  85.  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  86.  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  87.  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  88.  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  89.  * PARTICULAR PURPOSE.
  90.  *
  91.  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  92.  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  93.  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  94.  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  95.  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  96.  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  97.  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  98.  * LIMITED REMEDY.
  99.  *
  100.  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  101.  * software or system incorporating such software without first obtaining any
  102.  * required license or other approval from the U. S. Department of Commerce or
  103.  * any other agency or department of the United States Government.  In the
  104.  * event Licensee exports any such software from the United States or
  105.  * re-exports any such software from a foreign destination, Licensee shall
  106.  * ensure that the distribution and export/re-export of the software is in
  107.  * compliance with all laws, regulations, orders, or other restrictions of the
  108.  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  109.  * any of its subsidiaries will export/re-export any technical data, process,
  110.  * software, or service, directly or indirectly, to any country for which the
  111.  * United States government or any agency thereof requires an export license,
  112.  * other governmental approval, or letter of assurance, without first obtaining
  113.  * such license, approval or letter.
  114.  *
  115.  *****************************************************************************/
  116.  
  117. #include "acpisrc.h"
  118.  
  119.  
  120. /******************************************************************************
  121.  *
  122.  * FUNCTION:    AsSkipUntilChar
  123.  *
  124.  * DESCRIPTION: Find the next instance of the input character
  125.  *
  126.  ******************************************************************************/
  127.  
  128. char *
  129. AsSkipUntilChar (
  130.     char                    *Buffer,
  131.     char                    Target)
  132. {
  133.  
  134.     while (*Buffer != Target)
  135.     {
  136.         if (!*Buffer)
  137.         {
  138.             return NULL;
  139.         }
  140.  
  141.         Buffer++;
  142.     }
  143.  
  144.     return (Buffer);
  145. }
  146.  
  147.  
  148. /******************************************************************************
  149.  *
  150.  * FUNCTION:    AsSkipPastChar
  151.  *
  152.  * DESCRIPTION: Find the next instance of the input character, return a buffer
  153.  *              pointer to this character+1.
  154.  *
  155.  ******************************************************************************/
  156.  
  157. char *
  158. AsSkipPastChar (
  159.     char                    *Buffer,
  160.     char                    Target)
  161. {
  162.  
  163.     while (*Buffer != Target)
  164.     {
  165.         if (!*Buffer)
  166.         {
  167.             return NULL;
  168.         }
  169.  
  170.         Buffer++;
  171.     }
  172.  
  173.     Buffer++;
  174.  
  175.     return (Buffer);
  176. }
  177.  
  178.  
  179. /******************************************************************************
  180.  *
  181.  * FUNCTION:    AsReplaceData
  182.  *
  183.  * DESCRIPTION: This function inserts and removes data from the file buffer.
  184.  *              if more data is inserted than is removed, the data in the buffer
  185.  *              is moved to make room.  If less data is inserted than is removed,
  186.  *              the remaining data is moved to close the hole.
  187.  *
  188.  ******************************************************************************/
  189.  
  190. char *
  191. AsReplaceData (
  192.     char                    *Buffer,
  193.     UINT32                  LengthToRemove,
  194.     char                    *BufferToAdd,
  195.     UINT32                  LengthToAdd)
  196. {
  197.     UINT32                  BufferLength;
  198.  
  199.  
  200.     /*
  201.      * Buffer is a string, so the length must include the terminating zero
  202.      */
  203.     BufferLength = strlen (Buffer) + 1;
  204.  
  205.     if (LengthToRemove != LengthToAdd)
  206.     {
  207.         /*
  208.          * Move some of the existing data
  209.          * 1) If adding more bytes than removing, make room for the new data
  210.          * 2) if removing more bytes than adding, delete the extra space
  211.          */
  212.         if (LengthToRemove > 0)
  213.         {
  214.             Gbl_MadeChanges = TRUE;
  215.             memmove ((Buffer + LengthToAdd), (Buffer + LengthToRemove), (BufferLength - LengthToRemove));
  216.         }
  217.     }
  218.  
  219.     /*
  220.      * Now we can move in the new data
  221.      */
  222.     if (LengthToAdd > 0)
  223.     {
  224.         Gbl_MadeChanges = TRUE;
  225.         memmove (Buffer, BufferToAdd, LengthToAdd);
  226.     }
  227.  
  228.     return (Buffer + LengthToAdd);
  229. }
  230.  
  231.  
  232. /******************************************************************************
  233.  *
  234.  * FUNCTION:    AsInsertData
  235.  *
  236.  * DESCRIPTION: This function inserts and removes data from the file buffer.
  237.  *              if more data is inserted than is removed, the data in the buffer
  238.  *              is moved to make room.  If less data is inserted than is removed,
  239.  *              the remaining data is moved to close the hole.
  240.  *
  241.  ******************************************************************************/
  242.  
  243. char *
  244. AsInsertData (
  245.     char                    *Buffer,
  246.     char                    *BufferToAdd,
  247.     UINT32                  LengthToAdd)
  248. {
  249.     UINT32                  BufferLength;
  250.  
  251.  
  252.     if (LengthToAdd > 0)
  253.     {
  254.         /*
  255.          * Buffer is a string, so the length must include the terminating zero
  256.          */
  257.         BufferLength = strlen (Buffer) + 1;
  258.  
  259.         /*
  260.          * Move some of the existing data
  261.          * 1) If adding more bytes than removing, make room for the new data
  262.          * 2) if removing more bytes than adding, delete the extra space
  263.          */
  264.         Gbl_MadeChanges = TRUE;
  265.         memmove ((Buffer + LengthToAdd), Buffer, BufferLength);
  266.  
  267.         /*
  268.          * Now we can move in the new data
  269.          */
  270.         memmove (Buffer, BufferToAdd, LengthToAdd);
  271.     }
  272.  
  273.     return (Buffer + LengthToAdd);
  274. }
  275.  
  276.  
  277. /******************************************************************************
  278.  *
  279.  * FUNCTION:    AsRemoveData
  280.  *
  281.  * DESCRIPTION: This function inserts and removes data from the file buffer.
  282.  *              if more data is inserted than is removed, the data in the buffer
  283.  *              is moved to make room.  If less data is inserted than is removed,
  284.  *              the remaining data is moved to close the hole.
  285.  *
  286.  ******************************************************************************/
  287.  
  288. char *
  289. AsRemoveData (
  290.     char                    *StartPointer,
  291.     char                    *EndPointer)
  292. {
  293.     UINT32                  BufferLength;
  294.  
  295.  
  296.     /*
  297.      * Buffer is a string, so the length must include the terminating zero
  298.      */
  299.     BufferLength = strlen (EndPointer) + 1;
  300.  
  301.     Gbl_MadeChanges = TRUE;
  302.     memmove (StartPointer, EndPointer, BufferLength);
  303.  
  304.     return (StartPointer);
  305. }
  306.  
  307.