/usr/include/antlr3recognizersharedstate.h is in libantlr3c-dev 3.2-3.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 | /** \file
* While the C runtime does not need to model the state of
* multiple lexers and parsers in the same way as the Java runtime does
* it is no overhead to reflect that model. In fact the
* C runtime has always been able to share recognizer state.
*
* This 'class' therefore defines all the elements of a recognizer
* (either lexer, parser or tree parser) that are need to
* track the current recognition state. Multiple recognizers
* may then share this state, for instance when one grammar
* imports another.
*/
#ifndef _ANTLR3_RECOGNIZER_SHARED_STATE_H
#define _ANTLR3_RECOGNIZER_SHARED_STATE_H
// [The "BSD licence"]
// Copyright (c) 2005-2009 Jim Idle, Temporal Wave LLC
// http://www.temporal-wave.com
// http://www.linkedin.com/in/jimidle
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <antlr3defs.h>
#ifdef __cplusplus
extern "C" {
#endif
/** All the data elements required to track the current state
* of any recognizer (lexer, parser, tree parser).
* May be share between multiple recognizers such that
* grammar inheritance is easily supported.
*/
typedef struct ANTLR3_RECOGNIZER_SHARED_STATE_struct
{
/** If set to ANTLR3_TRUE then the recognizer has an exception
* condition (this is tested by the generated code for the rules of
* the grammar).
*/
ANTLR3_BOOLEAN error;
/** Points to the first in a possible chain of exceptions that the
* recognizer has discovered.
*/
pANTLR3_EXCEPTION exception;
/** Track around a hint from the creator of the recognizer as to how big this
* thing is going to get, as the actress said to the bishop. This allows us
* to tune hash tables accordingly. This might not be the best place for this
* in the end but we will see.
*/
ANTLR3_UINT32 sizeHint;
/** Track the set of token types that can follow any rule invocation.
* Stack structure, to support: List<BitSet>.
*/
pANTLR3_STACK following;
/** This is true when we see an error and before having successfully
* matched a token. Prevents generation of more than one error message
* per error.
*/
ANTLR3_BOOLEAN errorRecovery;
/** The index into the input stream where the last error occurred.
* This is used to prevent infinite loops where an error is found
* but no token is consumed during recovery...another error is found,
* ad nauseam. This is a failsafe mechanism to guarantee that at least
* one token/tree node is consumed for two errors.
*/
ANTLR3_MARKER lastErrorIndex;
/** In lieu of a return value, this indicates that a rule or token
* has failed to match. Reset to false upon valid token match.
*/
ANTLR3_BOOLEAN failed;
/** When the recognizer terminates, the error handling functions
* will have incremented this value if any error occurred (that was displayed). It can then be
* used by the grammar programmer without having to use static globals.
*/
ANTLR3_UINT32 errorCount;
/** If 0, no backtracking is going on. Safe to exec actions etc...
* If >0 then it's the level of backtracking.
*/
ANTLR3_INT32 backtracking;
/** ANTLR3_VECTOR of ANTLR3_LIST for rule memoizing.
* Tracks the stop token index for each rule. ruleMemo[ruleIndex] is
* the memoization table for ruleIndex. For key ruleStartIndex, you
* get back the stop token for associated rule or MEMO_RULE_FAILED.
*
* This is only used if rule memoization is on.
*/
pANTLR3_INT_TRIE ruleMemo;
/** Pointer to an array of token names
* that are generally useful in error reporting. The generated parsers install
* this pointer. The table it points to is statically allocated as 8 bit ascii
* at parser compile time - grammar token names are thus restricted in character
* sets, which does not seem to terrible.
*/
pANTLR3_UINT8 * tokenNames;
/** User programmable pointer that can be used for instance as a place to
* store some tracking structure specific to the grammar that would not normally
* be available to the error handling functions.
*/
void * userp;
/** The goal of all lexer rules/methods is to create a token object.
* This is an instance variable as multiple rules may collaborate to
* create a single token. For example, NUM : INT | FLOAT ;
* In this case, you want the INT or FLOAT rule to set token and not
* have it reset to a NUM token in rule NUM.
*/
pANTLR3_COMMON_TOKEN token;
/** The goal of all lexer rules being to create a token, then a lexer
* needs to build a token factory to create them.
*/
pANTLR3_TOKEN_FACTORY tokFactory;
/** A lexer is a source of tokens, produced by all the generated (or
* hand crafted if you like) matching rules. As such it needs to provide
* a token source interface implementation.
*/
pANTLR3_TOKEN_SOURCE tokSource;
/** The channel number for the current token
*/
ANTLR3_UINT32 channel;
/** The token type for the current token
*/
ANTLR3_UINT32 type;
/** The input line (where it makes sense) on which the first character of the current
* token resides.
*/
ANTLR3_INT32 tokenStartLine;
/** The character position of the first character of the current token
* within the line specified by tokenStartLine
*/
ANTLR3_INT32 tokenStartCharPositionInLine;
/** What character index in the stream did the current token start at?
* Needed, for example, to get the text for current token. Set at
* the start of nextToken.
*/
ANTLR3_MARKER tokenStartCharIndex;
/** Text for the current token. This can be overridden by setting this
* variable directly or by using the SETTEXT() macro (preferred) in your
* lexer rules.
*/
pANTLR3_STRING text;
/** User controlled variables that will be installed in a newly created
* token.
*/
ANTLR3_UINT32 user1, user2, user3;
void * custom;
/** Input stream stack, which allows the C programmer to switch input streams
* easily and allow the standard nextToken() implementation to deal with it
* as this is a common requirement.
*/
pANTLR3_STACK streams;
/// A stack of token/tree rewrite streams that are available for use
/// by a parser or tree parser that is using rewrites to generate
/// an AST. This saves each rule in the recongizer from having to
/// allocate and deallocate rewtire streams on entry and exit. As
/// the parser recurses throgh the rules it will reach a steady state
/// of the maximum number of allocated streams, which instead of
/// deallocating them at rule exit, it will place on this stack for
/// reuse. The streams are then all finally freed when this stack
/// is freed.
///
pANTLR3_VECTOR rStreams;
}
ANTLR3_RECOGNIZER_SHARED_STATE;
#ifdef __cplusplus
}
#endif
#endif
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