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utuuid.c revision 1.2 
      1 /******************************************************************************
      2  *
      3  * Module Name: utuuid -- UUID support functions
      4  *
      5  *****************************************************************************/
      6 
      7 /*
      8  * Copyright (C) 2000 - 2014, Intel Corp.
      9  * All rights reserved.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions, and the following disclaimer,
     16  *    without modification.
     17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     18  *    substantially similar to the "NO WARRANTY" disclaimer below
     19  *    ("Disclaimer") and any redistribution must be conditioned upon
     20  *    including a substantially similar Disclaimer requirement for further
     21  *    binary redistribution.
     22  * 3. Neither the names of the above-listed copyright holders nor the names
     23  *    of any contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * Alternatively, this software may be distributed under the terms of the
     27  * GNU General Public License ("GPL") version 2 as published by the Free
     28  * Software Foundation.
     29  *
     30  * NO WARRANTY
     31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
     34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     41  * POSSIBILITY OF SUCH DAMAGES.
     42  */
     43 
     44 #define __UTUUID_C__
     45 
     46 #include "acpi.h"
     47 #include "accommon.h"
     48 
     49 #define _COMPONENT          ACPI_COMPILER
     50         ACPI_MODULE_NAME    ("utuuid")
     51 
     52 
     53 /*
     54  * UUID support functions.
     55  *
     56  * This table is used to convert an input UUID ascii string to a 16 byte
     57  * buffer and the reverse. The table maps a UUID buffer index 0-15 to
     58  * the index within the 36-byte UUID string where the associated 2-byte
     59  * hex value can be found.
     60  *
     61  * 36-byte UUID strings are of the form:
     62  *     aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
     63  * Where aa-pp are one byte hex numbers, made up of two hex digits
     64  *
     65  * Note: This table is basically the inverse of the string-to-offset table
     66  * found in the ACPI spec in the description of the ToUUID macro.
     67  */
     68 const UINT8    AcpiGbl_MapToUuidOffset[UUID_BUFFER_LENGTH] =
     69 {
     70     6,4,2,0,11,9,16,14,19,21,24,26,28,30,32,34
     71 };
     72 
     73 
     74 /*******************************************************************************
     75  *
     76  * FUNCTION:    AcpiUtConvertStringToUuid
     77  *
     78  * PARAMETERS:  InString            - 36-byte formatted UUID string
     79  *              UuidBuffer          - Where the 16-byte UUID buffer is returned
     80  *
     81  * RETURN:      None. Output data is returned in the UuidBuffer
     82  *
     83  * DESCRIPTION: Convert a 36-byte formatted UUID string to 16-byte UUID buffer
     84  *
     85  ******************************************************************************/
     86 
     87 void
     88 AcpiUtConvertStringToUuid (
     89     const char              *InString,
     90     UINT8                   *UuidBuffer)
     91 {
     92     UINT32                  i;
     93 
     94 
     95     for (i = 0; i < UUID_BUFFER_LENGTH; i++)
     96     {
     97         UuidBuffer[i] =
     98             (AcpiUtAsciiCharToHex (InString[AcpiGbl_MapToUuidOffset[i]]) << 4);
     99 
    100         UuidBuffer[i] |=
    101             AcpiUtAsciiCharToHex (InString[AcpiGbl_MapToUuidOffset[i] + 1]);
    102     }
    103 }
    104