xref: /freebsd/sys/contrib/dev/acpica/compiler/prparser.l (revision 8d20be1e22095c27faf8fe8b2f0d089739cc742e)
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 <contrib/dev/acpica/compiler/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