/******************************************************************************
 *
 * Module Name: asluuid-- compiler UUID support
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999 - 2014, 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 "aslcompiler.h"

#define _COMPONENT          ACPI_COMPILER
        ACPI_MODULE_NAME    ("asluuid")


/*
 * UUID support functions.
 *
 * This table is used to convert an input UUID ascii string to a 16 byte
 * buffer and the reverse. The table maps a UUID buffer index 0-15 to
 * the index within the 36-byte UUID string where the associated 2-byte
 * hex value can be found.
 *
 * 36-byte UUID strings are of the form:
 *     aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
 * Where aa-pp are one byte hex numbers, made up of two hex digits
 *
 * Note: This table is basically the inverse of the string-to-offset table
 * found in the ACPI spec in the description of the ToUUID macro.
 */
static UINT8    Gbl_MapToUuidOffset[16] =
{
    6,4,2,0,11,9,16,14,19,21,24,26,28,30,32,34
};

#define UUID_BUFFER_LENGTH          16
#define UUID_STRING_LENGTH          36

/* Positions for required hyphens (dashes) in UUID strings */

#define UUID_HYPHEN1_OFFSET         8
#define UUID_HYPHEN2_OFFSET         13
#define UUID_HYPHEN3_OFFSET         18
#define UUID_HYPHEN4_OFFSET         23


/*******************************************************************************
 *
 * FUNCTION:    AuValiduateUuid
 *
 * PARAMETERS:  InString            - 36-byte formatted UUID string
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Check all 36 characters for correct format
 *
 ******************************************************************************/

ACPI_STATUS
AuValidateUuid (
    char                    *InString)
{
    UINT32                  i;


    if (!InString || (ACPI_STRLEN (InString) != UUID_STRING_LENGTH))
    {
        return (AE_BAD_PARAMETER);
    }

    /* Check all 36 characters for correct format */

    for (i = 0; i < UUID_STRING_LENGTH; i++)
    {
        /* Must have 4 hyphens (dashes) in these positions: */

        if ((i == UUID_HYPHEN1_OFFSET) ||
            (i == UUID_HYPHEN2_OFFSET) ||
            (i == UUID_HYPHEN3_OFFSET) ||
            (i == UUID_HYPHEN4_OFFSET))
        {
            if (InString[i] != '-')
            {
                return (AE_BAD_PARAMETER);
            }
        }

        /* All other positions must contain hex digits */

        else
        {
            if (!isxdigit ((int) InString[i]))
            {
                return (AE_BAD_PARAMETER);
            }
        }
    }

    return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    AuConvertStringToUuid
 *
 * PARAMETERS:  InString            - 36-byte formatted UUID string
 *              UuidBuffer          - 16-byte UUID buffer
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert 36-byte formatted UUID string to 16-byte UUID buffer
 *
 ******************************************************************************/

ACPI_STATUS
AuConvertStringToUuid (
    char                    *InString,
    char                    *UuidBuffer)
{
    UINT32                  i;


    if (!InString || !UuidBuffer)
    {
        return (AE_BAD_PARAMETER);
    }

    for (i = 0; i < UUID_BUFFER_LENGTH; i++)
    {
        UuidBuffer[i]  = (char) (UtHexCharToValue (InString[Gbl_MapToUuidOffset[i]]) << 4);
        UuidBuffer[i] |= (char)  UtHexCharToValue (InString[Gbl_MapToUuidOffset[i] + 1]);
    }

    return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    AuConvertUuidToString
 *
 * PARAMETERS:  UuidBuffer          - 16-byte UUID buffer
 *              OutString           - 36-byte formatted UUID string
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert 16-byte UUID buffer to 36-byte formatted UUID string
 *              OutString must be 37 bytes to include null terminator.
 *
 ******************************************************************************/

ACPI_STATUS
AuConvertUuidToString (
    char                    *UuidBuffer,
    char                    *OutString)
{
    UINT32                  i;


    if (!UuidBuffer || !OutString)
    {
        return (AE_BAD_PARAMETER);
    }

    for (i = 0; i < UUID_BUFFER_LENGTH; i++)
    {
        OutString[Gbl_MapToUuidOffset[i]] =     (UINT8) AslHexLookup[(UuidBuffer[i] >> 4) & 0xF];
        OutString[Gbl_MapToUuidOffset[i] + 1] = (UINT8) AslHexLookup[UuidBuffer[i] & 0xF];
    }

    /* Insert required hyphens (dashes) */

    OutString[UUID_HYPHEN1_OFFSET] =
    OutString[UUID_HYPHEN2_OFFSET] =
    OutString[UUID_HYPHEN3_OFFSET] =
    OutString[UUID_HYPHEN4_OFFSET] = '-';

    OutString[UUID_STRING_LENGTH] = 0; /* Null terminate */
    return (AE_OK);
}
