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/******************************************************************************
*
* Module Name: asluuid-- compiler UUID support
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2012, Intel Corp.
* All rights reserved.
*
* 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.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* 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 MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#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);
}
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