prparser.l revision 306536 
1%{
2/******************************************************************************
3 *
4 * Module Name: prparser.l - Flex input file for preprocessor lexer
5 *
6 *****************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2016, 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 _COMPONENT          ACPI_COMPILER
54        ACPI_MODULE_NAME    ("prscanner")
55
56
57/* Local prototypes */
58
59static char
60PrDoCommentType1 (
61    void);
62
63static char
64PrDoCommentType2 (
65    void);
66%}
67
68%option noyywrap
69
70Number          [0-9a-fA-F]+
71HexNumber       0[xX][0-9a-fA-F]+
72WhiteSpace      [ \t\v\r]+
73NewLine         [\n]
74Identifier      [a-zA-Z][0-9a-zA-Z]*
75
76%%
77"/*"            { if (!PrDoCommentType1 ()) {yyterminate ();} }
78"//"            { if (!PrDoCommentType2 ()) {yyterminate ();} }
79
80\(              return (EXPOP_PAREN_OPEN);
81\)              return (EXPOP_PAREN_CLOSE);
82\~              return (EXPOP_ONES_COMPLIMENT);
83\!              return (EXPOP_LOGICAL_NOT);
84\*              return (EXPOP_MULTIPLY);
85\/              return (EXPOP_DIVIDE);
86\%              return (EXPOP_MODULO);
87\+              return (EXPOP_ADD);
88\-              return (EXPOP_SUBTRACT);
89">>"            return (EXPOP_SHIFT_RIGHT);
90"<<"            return (EXPOP_SHIFT_LEFT);
91\<              return (EXPOP_LESS);
92\>              return (EXPOP_GREATER);
93"<="            return (EXPOP_LESS_EQUAL);
94">="            return (EXPOP_GREATER_EQUAL);
95"=="            return (EXPOP_EQUAL);
96"!="            return (EXPOP_NOT_EQUAL);
97\&              return (EXPOP_AND);
98\^              return (EXPOP_XOR);
99\|              return (EXPOP_OR);
100"&&"            return (EXPOP_LOGICAL_AND);
101"||"            return (EXPOP_LOGICAL_OR);
102
103"defined"       return (EXPOP_DEFINE);
104{Identifier}    {STRING_SETUP; return (EXPOP_IDENTIFIER);}
105
106<<EOF>>         return (EXPOP_EOF); /* null end-of-string */
107
108{Number}        return (EXPOP_NUMBER);
109{HexNumber}     return (EXPOP_HEX_NUMBER);
110{NewLine}       return (EXPOP_NEW_LINE);
111{WhiteSpace}    /* Ignore */
112
113.               return (EXPOP_EOF);
114%%
115
116/*
117 * Local support functions
118 */
119YY_BUFFER_STATE         LexBuffer;
120
121
122/******************************************************************************
123 *
124 * FUNCTION:    PrInitLexer
125 *
126 * PARAMETERS:  String              - Input string to be parsed
127 *
128 * RETURN:      TRUE if parser returns NULL. FALSE otherwise.
129 *
130 * DESCRIPTION: Initialization routine for lexer. The lexer needs
131 *              a buffer to handle strings instead of a file.
132 *
133 *****************************************************************************/
134
135int
136PrInitLexer (
137    char                    *String)
138{
139
140    LexBuffer = yy_scan_string (String);
141    return (LexBuffer == NULL);
142}
143
144
145/******************************************************************************
146 *
147 * FUNCTION:    PrTerminateLexer
148 *
149 * PARAMETERS:  None
150 *
151 * RETURN:      None
152 *
153 * DESCRIPTION: Termination routine for thelexer.
154 *
155 *****************************************************************************/
156
157void
158PrTerminateLexer (
159    void)
160{
161
162    yy_delete_buffer (LexBuffer);
163}
164
165
166/********************************************************************************
167 *
168 * FUNCTION:    PrDoCommentType1
169 *
170 * PARAMETERS:  none
171 *
172 * RETURN:      none
173 *
174 * DESCRIPTION: Process a new legacy comment. Just toss it.
175 *
176 ******************************************************************************/
177
178static char
179PrDoCommentType1 (
180    void)
181{
182    int                 c;
183
184
185Loop:
186    while (((c = input ()) != '*') && (c != EOF))
187    {
188    }
189    if (c == EOF)
190    {
191        return (FALSE);
192    }
193
194    if (((c = input ()) != '/') && (c != EOF))
195    {
196        unput (c);
197        goto Loop;
198    }
199    if (c == EOF)
200    {
201        return (FALSE);
202    }
203
204    return (TRUE);
205}
206
207
208/********************************************************************************
209 *
210 * FUNCTION:    PrDoCommentType2
211 *
212 * PARAMETERS:  none
213 *
214 * RETURN:      none
215 *
216 * DESCRIPTION: Process a new "//" comment. Just toss it.
217 *
218 ******************************************************************************/
219
220static char
221PrDoCommentType2 (
222    void)
223{
224    int                 c;
225
226
227    while (((c = input ()) != '\n') && (c != EOF))
228    {
229    }
230    if (c == EOF)
231    {
232        return (FALSE);
233    }
234
235    return (TRUE);
236}
237