xref: /freebsd/sys/contrib/dev/acpica/compiler/prparser.l (revision 39ee7a7a6bdd1557b1c3532abf60d139798ac88b)
1 %{
2 /******************************************************************************
3  *
4  * Module Name: prparser.l - Flex input file for preprocessor lexer
5  *
6  *****************************************************************************/
7 
8 /*
9  * Copyright (C) 2000 - 2015, 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 
59 static char
60 PrDoCommentType1 (
61     void);
62 
63 static char
64 PrDoCommentType2 (
65     void);
66 %}
67 
68 %option noyywrap
69 
70 Number          [0-9a-fA-F]+
71 HexNumber       0[xX][0-9a-fA-F]+
72 WhiteSpace      [ \t\v\r]+
73 NewLine         [\n]
74 Identifier      [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  */
119 YY_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 
135 int
136 PrInitLexer (
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 
157 void
158 PrTerminateLexer (
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 
178 static char
179 PrDoCommentType1 (
180     void)
181 {
182     int                 c;
183 
184 
185 Loop:
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 
220 static char
221 PrDoCommentType2 (
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