dist/compiler/preprocess.h

/******************************************************************************
 *
 * Module Name: preprocess.h - header for iASL Preprocessor
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999 - 2025, 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.
 *
 *****************************************************************************/

#define __PREPROCESS_H__

#ifndef _PREPROCESS
#define _PREPROCESS

#undef PR_EXTERN

#ifdef _DECLARE_PR_GLOBALS
#define PR_EXTERN
#define PR_INIT_GLOBAL(a,b)         (a)=(b)
#else
#define PR_EXTERN                   extern
#define PR_INIT_GLOBAL(a,b)         (a)
#endif


/*
 * Configuration
 */
#define PR_MAX_MACRO_ARGS       32              /* Max number of macro args */
#define PR_MAX_ARG_INSTANCES    24              /* Max instances of any one arg */
#define PR_LINES_PER_BLOCK      4096            /* Max input source lines per block */


/*
 * Local defines and macros
 */
#define PR_TOKEN_SEPARATORS     " ,(){}\t\n"
#define PR_MACRO_SEPARATORS     " ,(){}~!*/%+-<>=&^|\"\t\n"
#define PR_MACRO_ARGUMENTS      " ,\t\n"
#define PR_EXPR_SEPARATORS      " ,(){}~!*/%+-<>=&^|\"\t\n"

#define PR_PREFIX_ID            "Pr(%.4u) - "             /* Used for debug output */

#define THIS_TOKEN_OFFSET(t)    ((AslGbl_MainTokenBuffer - t) + 1)


/*
 * Preprocessor structures
 */
typedef struct pr_macro_arg
{
    char                        *Name;
    UINT32                      Offset[PR_MAX_ARG_INSTANCES];
    UINT16                      UseCount;

} PR_MACRO_ARG;

typedef struct pr_define_info
{
    struct pr_define_info       *Previous;
    struct pr_define_info       *Next;
    char                        *Identifier;
    char                        *Replacement;
    char                        *Body;          /* Macro body */
    PR_MACRO_ARG                *Args;          /* Macro arg list */
    UINT16                      ArgCount;       /* Macro arg count */
    BOOLEAN                     Persist;        /* Keep for entire compiler run */

} PR_DEFINE_INFO;

typedef struct pr_directive_info
{
    char                        *Name;          /* Directive name */
    UINT8                       ArgCount;       /* Required # of args */

} PR_DIRECTIVE_INFO;

typedef struct pr_operator_info
{
    char                        *Op;

} PR_OPERATOR_INFO;

typedef struct pr_file_node
{
    struct pr_file_node         *Next;
    FILE                        *File;
    char                        *Filename;
    UINT32                      CurrentLineNumber;

} PR_FILE_NODE;

#define MAX_ARGUMENT_LENGTH     24

typedef struct directive_info
{
    struct directive_info       *Next;
    char                        Argument[MAX_ARGUMENT_LENGTH];
    int                         Directive;
    BOOLEAN                     IgnoringThisCodeBlock;

} DIRECTIVE_INFO;


/*
 * Globals
 */
PR_EXTERN char                  PR_INIT_GLOBAL (*AslGbl_MainTokenBuffer, NULL); /* [ASL_LINE_BUFFER_SIZE]; */
PR_EXTERN char                  PR_INIT_GLOBAL (*AslGbl_MacroTokenBuffer, NULL); /* [ASL_LINE_BUFFER_SIZE]; */
PR_EXTERN char                  PR_INIT_GLOBAL (*AslGbl_MacroTokenReplaceBuffer, NULL); /* [ASL_LINE_BUFFER_SIZE]; */
PR_EXTERN char                  PR_INIT_GLOBAL (*AslGbl_ExpressionTokenBuffer, NULL); /* [ASL_LINE_BUFFER_SIZE]; */

PR_EXTERN UINT32                AslGbl_PreprocessorLineNumber;
PR_EXTERN int                   AslGbl_IfDepth;
PR_EXTERN PR_FILE_NODE          *AslGbl_InputFileList;
PR_EXTERN BOOLEAN               PR_INIT_GLOBAL (AslGbl_PreprocessorError, FALSE);
PR_EXTERN BOOLEAN               PR_INIT_GLOBAL (AslGbl_IgnoringThisCodeBlock, FALSE);
PR_EXTERN PR_DEFINE_INFO        PR_INIT_GLOBAL (*AslGbl_DefineList, NULL);
PR_EXTERN DIRECTIVE_INFO        PR_INIT_GLOBAL (*AslGbl_DirectiveStack, NULL);

#if 0 /* TBD for macros */
PR_EXTERN char                  PR_INIT_GLOBAL (*XXXEvalBuffer, NULL); /* [ASL_LINE_BUFFER_SIZE]; */
#endif


/*
 * prscan - Preprocessor entry
 */
void
PrInitializePreprocessor (
    void);

void
PrInitializeGlobals (
    void);

void
PrTerminatePreprocessor (
    void);

void
PrDoPreprocess (
    void);

UINT64
PrIsDefined (
    char                    *Identifier);

UINT64
PrResolveDefine (
    char                    *Identifier);

int
PrInitLexer (
    char                    *String);

void
PrTerminateLexer (
    void);


/*
 * prmacros - Support for #defines and macros
 */
void
PrDumpPredefinedNames (
    void);

PR_DEFINE_INFO *
PrAddDefine (
    char                    *Token,
    char                    *Token2,
    BOOLEAN                 Persist);

void
PrRemoveDefine (
    char                    *DefineName);

PR_DEFINE_INFO *
PrMatchDefine (
    char                    *MatchString);

void
PrAddMacro (
    char                    *Name,
    char                    **Next);

void
PrDoMacroInvocation (
    char                    *TokenBuffer,
    char                    *MacroStart,
    PR_DEFINE_INFO          *DefineInfo,
    char                    **Next);


/*
 * prexpress - #if expression support
 */
ACPI_STATUS
PrResolveIntegerExpression (
    char                    *Line,
    UINT64                  *ReturnValue);

char *
PrPrioritizeExpression (
    char                    *OriginalLine);

/*
 * prparser - lex/yacc expression parser
 */
UINT64
PrEvaluateExpression (
    char                    *ExprString);


/*
 * prutils - Preprocessor utilities
 */
char *
PrGetNextToken (
    char                    *Buffer,
    char                    *MatchString,
    char                    **Next);

void
PrError (
    UINT8                   Level,
    UINT16                  MessageId,
    UINT32                  Column);

void
PrReplaceResizeSubstring(
    PR_MACRO_ARG            *Args,
    UINT32                  Diff1,
    UINT32                  Diff2,
    UINT32                  i,
    char                    *Token);

char *
PrReplaceData (
    char                    *Buffer,
    UINT32                  LengthToRemove,
    char                    *BufferToAdd,
    UINT32                  LengthToAdd);

FILE *
PrOpenIncludeFile (
    char                    *Filename,
    char                    *OpenMode,
    char                    **FullPathname);

FILE *
PrOpenIncludeWithPrefix (
    char                    *PrefixDir,
    char                    *Filename,
    char                    *OpenMode,
    char                    **FullPathname);

void
PrPushInputFileStack (
    FILE                    *InputFile,
    char                    *Filename);

BOOLEAN
PrPopInputFileStack (
    void);

#endif