FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/compiler/prparser.y

     %{
     /******************************************************************************
      *
      * Module Name: prparser.y - Bison input file for preprocessor parser
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
     * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, 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    ("prparser")
   
   void *                      AslLocalAllocate (unsigned int Size);
   
   /* Bison/yacc configuration */
   
   #undef alloca
   #define alloca              AslLocalAllocate
   
   int                         PrParserlex (void);
   int                         PrParserparse (void);
   void                        PrParsererror (char const *msg);
   extern char                 *PrParsertext;
   
   UINT64                      PrParserResult; /* Expression return value */
   
   /* Bison/yacc configuration */
   
   #define yytname             PrParsername
   #define YYDEBUG             1               /* Enable debug output */
   #define YYERROR_VERBOSE     1               /* Verbose error messages */
   #define YYFLAG              -32768
   
   /* Define YYMALLOC/YYFREE to prevent redefinition errors  */
   
   #define YYMALLOC            malloc
   #define YYFREE              free
   %}
   
   %union
   {
        UINT64                 value;
        UINT32                 op;
        char                   *str;
   }
   
   /*! [Begin] no source code translation */
   
   %type  <value>  Expression
   
   %token <op>     EXPOP_EOF
   %token <op>     EXPOP_NEW_LINE
   %token <op>     EXPOP_NUMBER
   %token <op>     EXPOP_HEX_NUMBER
   %token <op>     EXPOP_RESERVED1
   %token <op>     EXPOP_RESERVED2
   %token <op>     EXPOP_PAREN_OPEN
   %token <op>     EXPOP_PAREN_CLOSE
   
   %left <op>      EXPOP_LOGICAL_OR
   %left <op>      EXPOP_LOGICAL_AND
   %left <op>      EXPOP_OR
   %left <op>      EXPOP_XOR
   %left <op>      EXPOP_AND
   %left <op>      EXPOP_EQUAL EXPOP_NOT_EQUAL
   %left <op>      EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL
   %left <op>      EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT
   %left <op>      EXPOP_ADD EXPOP_SUBTRACT
   %left <op>      EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO
   %right <op>     EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT
   
   /* Tokens above must be kept in synch with dtparser.y */
   
   %token <op>     EXPOP_DEFINE
   %token <op>     EXPOP_IDENTIFIER
   
   %%
   
   /*
    *  Operator precedence rules (from K&R)
    *
    *  1)      ( )
    *  2)      ! ~ (unary operators that are supported here)
    *  3)      *   /   %
    *  4)      +   -
    *  5)      >>  <<
    *  6)      <   >   <=  >=
    *  7)      ==  !=
    *  8)      &
    *  9)      ^
    *  10)     |
    *  11)     &&
    *  12)     ||
    */
   
   /*! [End] no source code translation !*/
   
   Value
       : Expression EXPOP_NEW_LINE                     { PrParserResult=$1; return 0; } /* End of line (newline) */
       | Expression EXPOP_EOF                          { PrParserResult=$1; return 0; } /* End of string (0) */
       ;
   
   Expression
   
         /* Unary operators */
   
       : EXPOP_LOGICAL_NOT         Expression          { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT,     $2);}
       | EXPOP_ONES_COMPLIMENT     Expression          { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);}
   
         /* Binary operators */
   
       | Expression EXPOP_MULTIPLY         Expression  { $$ = DtDoOperator ($1, EXPOP_MULTIPLY,        $3);}
       | Expression EXPOP_DIVIDE           Expression  { $$ = DtDoOperator ($1, EXPOP_DIVIDE,          $3);}
       | Expression EXPOP_MODULO           Expression  { $$ = DtDoOperator ($1, EXPOP_MODULO,          $3);}
       | Expression EXPOP_ADD              Expression  { $$ = DtDoOperator ($1, EXPOP_ADD,             $3);}
       | Expression EXPOP_SUBTRACT         Expression  { $$ = DtDoOperator ($1, EXPOP_SUBTRACT,        $3);}
       | Expression EXPOP_SHIFT_RIGHT      Expression  { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT,     $3);}
       | Expression EXPOP_SHIFT_LEFT       Expression  { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT,      $3);}
       | Expression EXPOP_GREATER          Expression  { $$ = DtDoOperator ($1, EXPOP_GREATER,         $3);}
       | Expression EXPOP_LESS             Expression  { $$ = DtDoOperator ($1, EXPOP_LESS,            $3);}
       | Expression EXPOP_GREATER_EQUAL    Expression  { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL,   $3);}
       | Expression EXPOP_LESS_EQUAL       Expression  { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL,      $3);}
       | Expression EXPOP_EQUAL            Expression  { $$ = DtDoOperator ($1, EXPOP_EQUAL,           $3);}
       | Expression EXPOP_NOT_EQUAL        Expression  { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL,       $3);}
       | Expression EXPOP_AND              Expression  { $$ = DtDoOperator ($1, EXPOP_AND,             $3);}
       | Expression EXPOP_XOR              Expression  { $$ = DtDoOperator ($1, EXPOP_XOR,             $3);}
       | Expression EXPOP_OR               Expression  { $$ = DtDoOperator ($1, EXPOP_OR,              $3);}
       | Expression EXPOP_LOGICAL_AND      Expression  { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND,     $3);}
       | Expression EXPOP_LOGICAL_OR       Expression  { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR,      $3);}
   
         /* Parentheses: '(' Expression ')' */
   
       | EXPOP_PAREN_OPEN          Expression
           EXPOP_PAREN_CLOSE                           { $$ = $2;}
   
         /* #if defined (ID) or #if defined ID */
   
       | EXPOP_DEFINE EXPOP_PAREN_OPEN EXPOP_IDENTIFIER
           EXPOP_PAREN_CLOSE                           { $$ = PrIsDefined (PrParserlval.str);}
   
       | EXPOP_DEFINE EXPOP_IDENTIFIER                 { $$ = PrIsDefined (PrParserlval.str);}
   
       | EXPOP_IDENTIFIER                              { $$ = PrResolveDefine (PrParserlval.str);}
   
         /* Default base for a non-prefixed integer is 10 */
   
       | EXPOP_NUMBER                                  { AcpiUtStrtoul64 (PrParsertext, &$$);}
   
         /* Standard hex number (0x1234) */
   
       | EXPOP_HEX_NUMBER                              { AcpiUtStrtoul64 (PrParsertext, &$$);}
       ;
   %%
   
   /*
    * Local support functions, including parser entry point
    */
   #define PR_FIRST_PARSE_OPCODE   EXPOP_EOF
   #define PR_YYTNAME_START        3
   
   
   /******************************************************************************
    *
    * FUNCTION:    PrParsererror
    *
    * PARAMETERS:  Message             - Parser-generated error message
    *
    * RETURN:      None
    *
    * DESCRIPTION: Handler for parser errors
    *
    *****************************************************************************/
   
   void
   PrParsererror (
       char const              *Message)
   {
   
       sprintf (AslGbl_StringBuffer, "Preprocessor Parser : %s (near line %u)",
           Message, AslGbl_CurrentLineNumber);
       DtError (ASL_ERROR, ASL_MSG_SYNTAX,
           NULL, (char *) AslGbl_StringBuffer);
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    PrGetOpName
    *
    * PARAMETERS:  ParseOpcode         - Parser token (EXPOP_*)
    *
    * RETURN:      Pointer to the opcode name
    *
    * DESCRIPTION: Get the ascii name of the parse opcode for debug output
    *
    *****************************************************************************/
   
   char *
   PrGetOpName (
       UINT32                  ParseOpcode)
   {
   #ifdef ASL_YYTNAME_START
       /*
        * First entries (PR_YYTNAME_START) in yytname are special reserved names.
        * Ignore first 6 characters of name (EXPOP_)
        */
       return ((char *) yytname
           [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6);
   #else
       return ("[Unknown parser generator]");
   #endif
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    PrEvaluateExpression
    *
    * PARAMETERS:  ExprString          - Expression to be evaluated. Must be
    *                                    terminated by either a newline or a NUL
    *                                    string terminator
    *
    * RETURN:      64-bit value for the expression
    *
    * DESCRIPTION: Main entry point for the DT expression parser
    *
    *****************************************************************************/
   
   UINT64
   PrEvaluateExpression (
       char                    *ExprString)
   {
   
       DbgPrint (ASL_DEBUG_OUTPUT,
           "**** Input expression: %s\n", ExprString);
   
       /* Point lexer to the input string */
   
       if (PrInitLexer (ExprString))
       {
           DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
               NULL, "Could not initialize lexer");
           return (0);
       }
   
       /* Parse/Evaluate the input string (value returned in PrParserResult) */
   
       PrParserparse ();
       PrTerminateLexer ();
   
       DbgPrint (ASL_DEBUG_OUTPUT,
           "**** Parser returned value: %u (%8.8X%8.8X)\n",
           (UINT32) PrParserResult, ACPI_FORMAT_UINT64 (PrParserResult));
   
       return (PrParserResult);
   }

Cache object: b1df0b9716e5ab246f2686272f312dc5