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f-stack/freebsd/contrib/dev/acpica/compiler/prexpress.c

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/******************************************************************************
*
* Module Name: prexpress - Preprocessor #if expression support
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2020, 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 <contrib/dev/acpica/compiler/aslcompiler.h>
#define _COMPONENT ASL_PREPROCESSOR
ACPI_MODULE_NAME ("prexpress")
/* Local prototypes */
static char *
PrExpandMacros (
char *Line);
#ifdef _UNDER_DEVELOPMENT
/******************************************************************************
*
* FUNCTION: PrUnTokenize
*
* PARAMETERS: Buffer - Token Buffer
* Next - "Next" buffer from GetNextToken
*
* RETURN: None
*
* DESCRIPTION: Un-tokenized the current token buffer. The implementation is
* to simply set the null inserted by GetNextToken to a blank.
* If Next is NULL, there were no tokens found in the Buffer,
* so there is nothing to do.
*
*****************************************************************************/
static void
PrUnTokenize (
char *Buffer,
char *Next)
{
UINT32 Length = strlen (Buffer);
if (!Next)
{
return;
}
if (Buffer[Length] != '\n')
{
Buffer[strlen(Buffer)] = ' ';
}
}
#endif
/******************************************************************************
*
* FUNCTION: PrExpandMacros
*
* PARAMETERS: Line - Pointer into the current line
*
* RETURN: Updated pointer into the current line
*
* DESCRIPTION: Expand any macros found in the current line buffer.
*
*****************************************************************************/
static char *
PrExpandMacros (
char *Line)
{
char *Token;
char *ReplaceString;
PR_DEFINE_INFO *DefineInfo;
ACPI_SIZE TokenOffset;
char *Next;
int OffsetAdjust;
strcpy (AslGbl_ExpressionTokenBuffer, AslGbl_CurrentLineBuffer);
Token = PrGetNextToken (AslGbl_ExpressionTokenBuffer, PR_EXPR_SEPARATORS, &Next);
OffsetAdjust = 0;
while (Token)
{
DefineInfo = PrMatchDefine (Token);
if (DefineInfo)
{
if (DefineInfo->Body)
{
/* This is a macro. TBD: Is this allowed? */
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"Matched Macro: %s->%s\n",
AslGbl_CurrentLineNumber, DefineInfo->Identifier,
DefineInfo->Replacement);
PrDoMacroInvocation (AslGbl_ExpressionTokenBuffer, Token,
DefineInfo, &Next);
}
else
{
ReplaceString = DefineInfo->Replacement;
/* Replace the name in the original line buffer */
TokenOffset = Token - AslGbl_ExpressionTokenBuffer + OffsetAdjust;
PrReplaceData (
&AslGbl_CurrentLineBuffer[TokenOffset], strlen (Token),
ReplaceString, strlen (ReplaceString));
/* Adjust for length difference between old and new name length */
OffsetAdjust += strlen (ReplaceString) - strlen (Token);
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"Matched #define within expression: %s->%s\n",
AslGbl_CurrentLineNumber, Token,
*ReplaceString ? ReplaceString : "(NULL STRING)");
}
}
Token = PrGetNextToken (NULL, PR_EXPR_SEPARATORS, &Next);
}
return (Line);
}
/******************************************************************************
*
* FUNCTION: PrIsDefined
*
* PARAMETERS: Identifier - Name to be resolved
*
* RETURN: 64-bit boolean integer value
*
* DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
*
*****************************************************************************/
UINT64
PrIsDefined (
char *Identifier)
{
UINT64 Value;
PR_DEFINE_INFO *DefineInfo;
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Is defined?: %s\n", AslGbl_CurrentLineNumber, Identifier);
Value = 0; /* Default is "Not defined" -- FALSE */
DefineInfo = PrMatchDefine (Identifier);
if (DefineInfo)
{
Value = ACPI_UINT64_MAX; /* TRUE */
}
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"[#if defined %s] resolved to: %8.8X%8.8X\n",
AslGbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
return (Value);
}
/******************************************************************************
*
* FUNCTION: PrResolveDefine
*
* PARAMETERS: Identifier - Name to be resolved
*
* RETURN: A 64-bit boolean integer value
*
* DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
*
*****************************************************************************/
UINT64
PrResolveDefine (
char *Identifier)
{
UINT64 Value;
PR_DEFINE_INFO *DefineInfo;
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Resolve #define: %s\n", AslGbl_CurrentLineNumber, Identifier);
Value = 0; /* Default is "Not defined" -- FALSE */
DefineInfo = PrMatchDefine (Identifier);
if (DefineInfo)
{
Value = ACPI_UINT64_MAX; /* TRUE */
}
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"[#if defined %s] resolved to: %8.8X%8.8X\n",
AslGbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
return (Value);
}
/******************************************************************************
*
* FUNCTION: PrResolveIntegerExpression
*
* PARAMETERS: Line - Pointer to integer expression
* ReturnValue - Where the resolved 64-bit integer is
* returned.
*
* RETURN: Status
*
* DESCRIPTION: Resolve an integer expression to a single value. Supports
* both integer constants and labels.
*
*****************************************************************************/
ACPI_STATUS
PrResolveIntegerExpression (
char *Line,
UINT64 *ReturnValue)
{
UINT64 Result;
char *ExpandedLine;
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Resolve #if: %s\n", AslGbl_CurrentLineNumber, Line);
/* Expand all macros within the expression first */
ExpandedLine = PrExpandMacros (Line);
/* Now we can evaluate the expression */
Result = PrEvaluateExpression (ExpandedLine);
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Expression Resolved to: %8.8X%8.8X\n",
AslGbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Result));
*ReturnValue = Result;
return (AE_OK);
#if 0
InvalidExpression:
ACPI_FREE (EvalBuffer);
PrError (ASL_ERROR, ASL_MSG_INVALID_EXPRESSION, 0);
return (AE_ERROR);
NormalExit:
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Expression Resolved to: %8.8X%8.8X\n",
AslGbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Value1));
*ReturnValue = Value1;
return (AE_OK);
#endif
}
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