Home | History | Annotate | Line # | Download | only in compiler
prparser.l revision 1.1.1.1.6.2 
      1 %{
      2 /******************************************************************************
      3  *
      4  * Module Name: prparser.l - Flex input file for preprocessor lexer
      5  *
      6  *****************************************************************************/
      7 
      8 /*
      9  * Copyright (C) 2000 - 2013, Intel Corp.
     10  * All rights reserved.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions, and the following disclaimer,
     17  *    without modification.
     18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     19  *    substantially similar to the "NO WARRANTY" disclaimer below
     20  *    ("Disclaimer") and any redistribution must be conditioned upon
     21  *    including a substantially similar Disclaimer requirement for further
     22  *    binary redistribution.
     23  * 3. Neither the names of the above-listed copyright holders nor the names
     24  *    of any contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * Alternatively, this software may be distributed under the terms of the
     28  * GNU General Public License ("GPL") version 2 as published by the Free
     29  * Software Foundation.
     30  *
     31  * NO WARRANTY
     32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
     35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     42  * POSSIBILITY OF SUCH DAMAGES.
     43  */
     44 
     45 #include "aslcompiler.h"
     46 #include "prparser.y.h"
     47 
     48 /* Buffer to pass strings to the parser */
     49 
     50 #define STRING_SETUP    strcpy (StringBuffer, PrParsertext);\
     51     PrParserlval.str = StringBuffer
     52 
     53 #define YY_NO_INPUT     /* No file input, we use strings only */
     54 
     55 #define _COMPONENT          ACPI_COMPILER
     56         ACPI_MODULE_NAME    ("prscanner")
     57 %}
     58 
     59 %option noyywrap
     60 %option nounput
     61 
     62 Number          [0-9a-fA-F]+
     63 HexNumber       0[xX][0-9a-fA-F]+
     64 WhiteSpace      [ \t\v\r]+
     65 NewLine         [\n]
     66 Identifier      [a-zA-Z][0-9a-zA-Z]*
     67 
     68 %%
     69 
     70 \(              return (EXPOP_PAREN_OPEN);
     71 \)              return (EXPOP_PAREN_CLOSE);
     72 \~              return (EXPOP_ONES_COMPLIMENT);
     73 \!              return (EXPOP_LOGICAL_NOT);
     74 \*              return (EXPOP_MULTIPLY);
     75 \/              return (EXPOP_DIVIDE);
     76 \%              return (EXPOP_MODULO);
     77 \+              return (EXPOP_ADD);
     78 \-              return (EXPOP_SUBTRACT);
     79 ">>"            return (EXPOP_SHIFT_RIGHT);
     80 "<<"            return (EXPOP_SHIFT_LEFT);
     81 \<              return (EXPOP_LESS);
     82 \>              return (EXPOP_GREATER);
     83 "<="            return (EXPOP_LESS_EQUAL);
     84 ">="            return (EXPOP_GREATER_EQUAL);
     85 "=="            return (EXPOP_EQUAL);
     86 "!="            return (EXPOP_NOT_EQUAL);
     87 \&              return (EXPOP_AND);
     88 \^              return (EXPOP_XOR);
     89 \|              return (EXPOP_OR);
     90 "&&"            return (EXPOP_LOGICAL_AND);
     91 "||"            return (EXPOP_LOGICAL_OR);
     92 
     93 "defined"       return (EXPOP_DEFINE);
     94 {Identifier}    {STRING_SETUP; return (EXPOP_IDENTIFIER);}
     95 
     96 <<EOF>>         return (EXPOP_EOF); /* null end-of-string */
     97 
     98 {Number}        return (EXPOP_NUMBER);
     99 {HexNumber}     return (EXPOP_HEX_NUMBER);
    100 {NewLine}       return (EXPOP_NEW_LINE);
    101 {WhiteSpace}    /* Ignore */
    102 
    103 .               return (EXPOP_EOF);
    104 %%
    105 
    106 /*
    107  * Local support functions
    108  */
    109 YY_BUFFER_STATE         LexBuffer;
    110 
    111 
    112 /******************************************************************************
    113  *
    114  * FUNCTION:    PrInitLexer
    115  *
    116  * PARAMETERS:  String              - Input string to be parsed
    117  *
    118  * RETURN:      TRUE if parser returns NULL. FALSE otherwise.
    119  *
    120  * DESCRIPTION: Initialization routine for lexer. The lexer needs
    121  *              a buffer to handle strings instead of a file.
    122  *
    123  *****************************************************************************/
    124 
    125 int
    126 PrInitLexer (
    127     char                    *String)
    128 {
    129 
    130     LexBuffer = yy_scan_string (String);
    131     return (LexBuffer == NULL);
    132 }
    133 
    134 
    135 /******************************************************************************
    136  *
    137  * FUNCTION:    PrTerminateLexer
    138  *
    139  * PARAMETERS:  None
    140  *
    141  * RETURN:      None
    142  *
    143  * DESCRIPTION: Termination routine for thelexer.
    144  *
    145  *****************************************************************************/
    146 
    147 void
    148 PrTerminateLexer (
    149     void)
    150 {
    151 
    152     yy_delete_buffer (LexBuffer);
    153 }
    154