306 lines
9.1 KiB
C
306 lines
9.1 KiB
C
/******************************************************************************
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*
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* Module Name: prexpress - Preprocessor #if expression support
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "aslcompiler.h"
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#include "dtcompiler.h"
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#define _COMPONENT ASL_PREPROCESSOR
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ACPI_MODULE_NAME ("prexpress")
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/* Local prototypes */
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static char *
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PrExpandMacros (
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char *Line);
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#ifdef _UNDER_DEVELOPMENT
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/******************************************************************************
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*
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* FUNCTION: PrUnTokenize
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*
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* PARAMETERS: Buffer - Token Buffer
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* Next - "Next" buffer from GetNextToken
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*
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* RETURN: None
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*
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* DESCRIPTION: Un-tokenized the current token buffer. The implementation is
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* to simply set the null inserted by GetNextToken to a blank.
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* If Next is NULL, there were no tokens found in the Buffer,
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* so there is nothing to do.
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*
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*****************************************************************************/
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static void
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PrUnTokenize (
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char *Buffer,
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char *Next)
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{
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UINT32 Length = strlen (Buffer);
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if (!Next)
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{
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return;
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}
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if (Buffer[Length] != '\n')
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{
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Buffer[strlen(Buffer)] = ' ';
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}
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}
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#endif
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/******************************************************************************
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*
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* FUNCTION: PrExpandMacros
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*
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* PARAMETERS: Line - Pointer into the current line
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*
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* RETURN: Updated pointer into the current line
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*
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* DESCRIPTION: Expand any macros found in the current line buffer.
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*
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*****************************************************************************/
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static char *
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PrExpandMacros (
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char *Line)
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{
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char *Token;
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char *ReplaceString;
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PR_DEFINE_INFO *DefineInfo;
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ACPI_SIZE TokenOffset;
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char *Next;
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int OffsetAdjust;
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strcpy (Gbl_ExpressionTokenBuffer, Gbl_CurrentLineBuffer);
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Token = PrGetNextToken (Gbl_ExpressionTokenBuffer, PR_EXPR_SEPARATORS, &Next);
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OffsetAdjust = 0;
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while (Token)
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{
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DefineInfo = PrMatchDefine (Token);
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if (DefineInfo)
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{
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if (DefineInfo->Body)
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{
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/* This is a macro. TBD: Is this allowed? */
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"Matched Macro: %s->%s\n",
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Gbl_CurrentLineNumber, DefineInfo->Identifier,
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DefineInfo->Replacement);
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PrDoMacroInvocation (Gbl_ExpressionTokenBuffer, Token,
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DefineInfo, &Next);
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}
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else
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{
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ReplaceString = DefineInfo->Replacement;
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/* Replace the name in the original line buffer */
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TokenOffset = Token - Gbl_ExpressionTokenBuffer + OffsetAdjust;
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PrReplaceData (
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&Gbl_CurrentLineBuffer[TokenOffset], strlen (Token),
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ReplaceString, strlen (ReplaceString));
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/* Adjust for length difference between old and new name length */
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OffsetAdjust += strlen (ReplaceString) - strlen (Token);
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"Matched #define within expression: %s->%s\n",
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Gbl_CurrentLineNumber, Token,
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*ReplaceString ? ReplaceString : "(NULL STRING)");
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}
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}
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Token = PrGetNextToken (NULL, PR_EXPR_SEPARATORS, &Next);
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}
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return (Line);
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}
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/******************************************************************************
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*
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* FUNCTION: PrIsDefined
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*
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* PARAMETERS: Identifier - Name to be resolved
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*
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* RETURN: 64-bit boolean integer value
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*
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* DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
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*
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*****************************************************************************/
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UINT64
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PrIsDefined (
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char *Identifier)
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{
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UINT64 Value;
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PR_DEFINE_INFO *DefineInfo;
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"**** Is defined?: %s\n", Gbl_CurrentLineNumber, Identifier);
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Value = 0; /* Default is "Not defined" -- FALSE */
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DefineInfo = PrMatchDefine (Identifier);
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if (DefineInfo)
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{
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Value = ACPI_UINT64_MAX; /* TRUE */
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}
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"[#if defined %s] resolved to: %8.8X%8.8X\n",
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Gbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
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return (Value);
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}
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/******************************************************************************
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*
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* FUNCTION: PrResolveDefine
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*
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* PARAMETERS: Identifier - Name to be resolved
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*
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* RETURN: A 64-bit boolean integer value
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*
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* DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
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*
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*****************************************************************************/
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UINT64
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PrResolveDefine (
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char *Identifier)
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{
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UINT64 Value;
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PR_DEFINE_INFO *DefineInfo;
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"**** Resolve #define: %s\n", Gbl_CurrentLineNumber, Identifier);
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Value = 0; /* Default is "Not defined" -- FALSE */
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DefineInfo = PrMatchDefine (Identifier);
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if (DefineInfo)
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{
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Value = ACPI_UINT64_MAX; /* TRUE */
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}
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"[#if defined %s] resolved to: %8.8X%8.8X\n",
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Gbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
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return (Value);
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}
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/******************************************************************************
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*
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* FUNCTION: PrResolveIntegerExpression
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*
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* PARAMETERS: Line - Pointer to integer expression
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* ReturnValue - Where the resolved 64-bit integer is
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* returned.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Resolve an integer expression to a single value. Supports
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* both integer constants and labels.
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*
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*****************************************************************************/
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ACPI_STATUS
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PrResolveIntegerExpression (
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char *Line,
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UINT64 *ReturnValue)
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{
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UINT64 Result;
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char *ExpandedLine;
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"**** Resolve #if: %s\n", Gbl_CurrentLineNumber, Line);
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/* Expand all macros within the expression first */
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ExpandedLine = PrExpandMacros (Line);
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/* Now we can evaluate the expression */
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Result = PrEvaluateExpression (ExpandedLine);
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"**** Expression Resolved to: %8.8X%8.8X\n",
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Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Result));
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*ReturnValue = Result;
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return (AE_OK);
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#if 0
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InvalidExpression:
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ACPI_FREE (EvalBuffer);
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PrError (ASL_ERROR, ASL_MSG_INVALID_EXPRESSION, 0);
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return (AE_ERROR);
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NormalExit:
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"**** Expression Resolved to: %8.8X%8.8X\n",
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Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Value1));
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*ReturnValue = Value1;
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return (AE_OK);
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#endif
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}
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