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