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857 lines
28 KiB
Plaintext
Executable File
857 lines
28 KiB
Plaintext
Executable File
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Copyright (c) Non, Inc. 1998 -- All Rights Reserved
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PROJECT: C Compiler
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MODULE: WParser
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FILE: WParser.g
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AUTHOR: Monty Zukowski (jamz@cdsnet.net) April 28, 1998
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MODIFICATIONS: Hernando Barragan added support for the Wiring language
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DESCRIPTION:
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This is a grammar for the GNU C compiler. It is a
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grammar subclass of StdCParser, overriding only those
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rules which are different from Standard C.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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header {
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package processing.app.preproc;
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import java.io.*;
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import antlr.CommonAST;
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import antlr.DumpASTVisitor;
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}
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class WParser extends StdCParser;
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options
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{
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k = 2;
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exportVocab = W;
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buildAST = true;
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ASTLabelType = "TNode";
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defaultErrorHandler = false;
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// Copied following options from java grammar.
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codeGenMakeSwitchThreshold = 2;
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codeGenBitsetTestThreshold = 3;
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}
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{
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// Suppport C++-style single-line comments?
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public static boolean CPPComments = true;
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// access to symbol table
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public CSymbolTable symbolTable = new CSymbolTable();
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// source for names to unnamed scopes
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protected int unnamedScopeCounter = 0;
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public boolean isTypedefName(String name) {
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boolean returnValue = false;
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TNode node = symbolTable.lookupNameInCurrentScope(name);
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for (; node != null; node = (TNode) node.getNextSibling() ) {
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if(node.getType() == LITERAL_typedef) {
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returnValue = true;
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break;
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}
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}
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return returnValue;
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}
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public String getAScopeName() {
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return "" + (unnamedScopeCounter++);
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}
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public void pushScope(String scopeName) {
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symbolTable.pushScope(scopeName);
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}
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public void popScope() {
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symbolTable.popScope();
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}
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int traceDepth = 0;
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public void reportError(RecognitionException ex) {
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try {
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System.err.println("ANTLR Parsing Error: "+ex + " token name:" + tokenNames[LA(1)]);
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ex.printStackTrace(System.err);
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}
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catch (TokenStreamException e) {
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System.err.println("ANTLR Parsing Error: "+ex);
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ex.printStackTrace(System.err);
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}
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}
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public void reportError(String s) {
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System.err.println("ANTLR Parsing Error from String: " + s);
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}
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public void reportWarning(String s) {
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System.err.println("ANTLR Parsing Warning from String: " + s);
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}
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public void match(int t) throws MismatchedTokenException {
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boolean debugging = false;
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if ( debugging ) {
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for (int x=0; x<traceDepth; x++) System.out.print(" ");
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try {
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System.out.println("Match("+tokenNames[t]+") with LA(1)="+
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tokenNames[LA(1)] + ((inputState.guessing>0)?" [inputState.guessing "+ inputState.guessing + "]":""));
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}
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catch (TokenStreamException e) {
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System.out.println("Match("+tokenNames[t]+") " + ((inputState.guessing>0)?" [inputState.guessing "+ inputState.guessing + "]":""));
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}
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}
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try {
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if ( LA(1)!=t ) {
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if ( debugging ){
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for (int x=0; x<traceDepth; x++) System.out.print(" ");
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System.out.println("token mismatch: "+tokenNames[LA(1)]
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+ "!="+tokenNames[t]);
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}
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throw new MismatchedTokenException(tokenNames, LT(1), t, false, getFilename());
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} else {
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// mark token as consumed -- fetch next token deferred until LA/LT
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consume();
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}
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}
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catch (TokenStreamException e) {
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}
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}
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public void traceIn(String rname) {
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traceDepth += 1;
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for (int x=0; x<traceDepth; x++) System.out.print(" ");
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try {
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System.out.println("> "+rname+"; LA(1)==("+ tokenNames[LT(1).getType()]
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+ ") " + LT(1).getText() + " [inputState.guessing "+ inputState.guessing + "]");
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}
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catch (TokenStreamException e) {
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}
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}
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public void traceOut(String rname) {
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for (int x=0; x<traceDepth; x++) System.out.print(" ");
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try {
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System.out.println("< "+rname+"; LA(1)==("+ tokenNames[LT(1).getType()]
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+ ") "+LT(1).getText() + " [inputState.guessing "+ inputState.guessing + "]");
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}
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catch (TokenStreamException e) {
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}
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traceDepth -= 1;
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}
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}
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translationUnit
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: ( externalList )? /* Empty source files are allowed. */
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;
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asm_expr
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: "asm"^
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("volatile")? LCURLY expr RCURLY ( SEMI )+
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;
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idList
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: ID ( options{warnWhenFollowAmbig=false;}: COMMA ID )*
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;
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externalDef
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: ( "typedef" | declaration )=> declaration
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| ( functionPrefix )=> functionDef
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| typelessDeclaration
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| asm_expr
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| SEMI
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;
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/* these two are here because GCC allows "cat = 13;" as a valid program! */
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functionPrefix
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{ String declName; }
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: ( (functionDeclSpecifiers)=> ds:functionDeclSpecifiers
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| //epsilon
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)
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declName = d:declarator[true]
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( declaration )* (VARARGS)? ( SEMI )*
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LCURLY
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;
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typelessDeclaration
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{ AST typeMissing = #[NTypeMissing]; }
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: initDeclList[typeMissing] SEMI { ## = #( #[NTypeMissing], ##); }
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;
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initializer
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: ( ( ( (initializerElementLabel)=> initializerElementLabel )?
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( assignExpr | lcurlyInitializer ) { ## = #( #[NInitializer], ## ); }
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)
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| lcurlyInitializer
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)
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;
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// GCC allows more specific initializers
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initializerElementLabel
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: ( ( LBRACKET ((constExpr VARARGS)=> rangeExpr | constExpr) RBRACKET (ASSIGN)? )
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| ID COLON
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| DOT ID ASSIGN
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)
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{ ## = #( #[NInitializerElementLabel], ##) ; }
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;
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// GCC allows empty initializer lists
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lcurlyInitializer
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:
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LCURLY^ (initializerList ( COMMA! )? )? RCURLY
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{ ##.setType( NLcurlyInitializer ); }
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;
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initializerList
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: initializer ( options{warnWhenFollowAmbig=false;}:COMMA! initializer )*
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;
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declarator[boolean isFunctionDefinition] returns [String declName]
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{ declName = ""; }
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:
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( pointerGroup )?
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( id:ID { declName = id.getText(); }
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| LPAREN declName = declarator[false] RPAREN
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)
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( declaratorParamaterList[isFunctionDefinition, declName]
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| LBRACKET ( expr )? RBRACKET
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)*
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{ ## = #( #[NDeclarator], ## ); }
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;
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declaratorParamaterList[boolean isFunctionDefinition, String declName]
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:
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LPAREN^
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{
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if (isFunctionDefinition) {
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pushScope(declName);
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}
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else {
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pushScope("!"+declName);
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}
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}
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(
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(declSpecifiers)=> parameterTypeList
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| (idList)?
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)
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{
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popScope();
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}
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( COMMA! )?
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RPAREN
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{ ##.setType(NParameterTypeList); }
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;
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parameterTypeList
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: parameterDeclaration
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( options {
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warnWhenFollowAmbig = false;
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} :
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( COMMA | SEMI )
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parameterDeclaration
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)*
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( ( COMMA | SEMI )
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VARARGS
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)?
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;
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declarationList
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: ( options { // this loop properly aborts when
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// it finds a non-typedefName ID MBZ
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warnWhenFollowAmbig = false;
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} :
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localLabelDeclaration
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| ( declarationPredictor )=> declaration
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)+
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;
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localLabelDeclaration
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: ( //GNU note: any __label__ declarations must come before regular declarations.
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"__label__"^ ID (options{warnWhenFollowAmbig=false;}: COMMA! ID)* ( COMMA! )? ( SEMI! )+
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)
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;
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declaration
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{ AST ds1 = null; }
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: ds:declSpecifiers { ds1 = astFactory.dupList(#ds); }
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(
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initDeclList[ds1]
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)?
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( SEMI )+
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{ ## = #( #[NDeclaration], ##); }
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;
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functionStorageClassSpecifier
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: "extern"
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| "static"
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| "inline"
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;
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typeSpecifier [int specCount] returns [int retSpecCount]
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{ retSpecCount = specCount + 1; }
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:
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( "void"
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| "char"
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| "short"
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| "int"
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| "long"
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| "float"
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| "double"
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| "signed"
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| "unsigned"
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| "byte"
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| "boolean"
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| "Servo"
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| "Wire"
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| structOrUnionSpecifier ( options{warnWhenFollowAmbig=false;}: attributeDecl )*
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| enumSpecifier
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| { specCount==0 }? typedefName
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| "typeof"^ LPAREN
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( ( typeName )=> typeName
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| expr
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)
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RPAREN
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| "__complex"
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)
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;
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structOrUnionSpecifier
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{ String scopeName; }
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: sou:structOrUnion!
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( ( ID LCURLY )=> i:ID l:LCURLY
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{
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scopeName = #sou.getText() + " " + #i.getText();
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#l.setText(scopeName);
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pushScope(scopeName);
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}
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( structDeclarationList )?
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{ popScope();}
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RCURLY
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| l1:LCURLY
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{
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scopeName = getAScopeName();
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#l1.setText(scopeName);
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pushScope(scopeName);
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}
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( structDeclarationList )?
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{ popScope(); }
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RCURLY
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| ID
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)
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{
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## = #( #sou, ## );
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}
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;
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structDeclaration
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: specifierQualifierList structDeclaratorList ( COMMA! )? ( SEMI! )+
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;
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structDeclaratorList
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: structDeclarator ( options{warnWhenFollowAmbig=false;}: COMMA! structDeclarator )*
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;
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structDeclarator
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: ( declarator[false] )?
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( COLON constExpr )?
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( attributeDecl )*
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{ ## = #( #[NStructDeclarator], ##); }
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;
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enumSpecifier
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: "enum"^
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( ( ID LCURLY )=> i:ID LCURLY enumList[i.getText()] RCURLY
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| LCURLY enumList["anonymous"] RCURLY
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| ID
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)
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;
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enumList[String enumName]
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: enumerator[enumName] ( options{warnWhenFollowAmbig=false;}: COMMA! enumerator[enumName] )* ( COMMA! )?
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;
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initDeclList[AST declarationSpecifiers]
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: initDecl[declarationSpecifiers]
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( options{warnWhenFollowAmbig=false;}: COMMA! initDecl[declarationSpecifiers] )*
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( COMMA! )?
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;
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initDecl[AST declarationSpecifiers]
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{ String declName = ""; }
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: declName = d:declarator[false]
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{ AST ds1, d1;
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ds1 = astFactory.dupList(declarationSpecifiers);
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d1 = astFactory.dupList(#d);
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symbolTable.add(declName, #(null, ds1, d1) );
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}
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( attributeDecl )*
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( ASSIGN initializer
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| COLON expr
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)?
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{ ## = #( #[NInitDecl], ## ); }
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;
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attributeDecl
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: "__attribute"^ LPAREN LPAREN attributeList RPAREN RPAREN
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| "asm"^ LPAREN stringConst RPAREN { ##.setType( NAsmAttribute ); }
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;
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attributeList
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: attribute ( options{warnWhenFollowAmbig=false;}: COMMA attribute)* ( COMMA )?
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;
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attribute
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: ( ~(LPAREN | RPAREN | COMMA)
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| LPAREN attributeList RPAREN
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)*
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;
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compoundStatement[String scopeName]
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: LCURLY^
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{
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pushScope(scopeName);
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}
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( //this ambiguity is ok, declarationList and nestedFunctionDef end properly
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options {
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warnWhenFollowAmbig = false;
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} :
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( "typedef" | "__label__" | declaration )=> declarationList
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| (nestedFunctionDef)=> nestedFunctionDef
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)*
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( statementList )?
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{ popScope(); }
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RCURLY
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{ ##.setType( NCompoundStatement ); ##.setAttribute( "scopeName", scopeName ); }
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;
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nestedFunctionDef
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{ String declName; }
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: ( "auto" )? //only for nested functions
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( (functionDeclSpecifiers)=> ds:functionDeclSpecifiers
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)?
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declName = d:declarator[false]
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{
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AST d2, ds2;
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d2 = astFactory.dupList(#d);
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ds2 = astFactory.dupList(#ds);
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symbolTable.add(declName, #(null, ds2, d2));
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pushScope(declName);
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}
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( declaration )*
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{ popScope(); }
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compoundStatement[declName]
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{ ## = #( #[NFunctionDef], ## );}
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;
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statement
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: SEMI // Empty statements
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| compoundStatement[getAScopeName()] // Group of statements
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| expr SEMI! { ## = #( #[NStatementExpr], ## );} // Expressions
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// Iteration statements:
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| "while"^ LPAREN! expr RPAREN! statement
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| "do"^ statement "while"! LPAREN! expr RPAREN! SEMI!
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|! "for"
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LPAREN ( e1:expr )? SEMI ( e2:expr )? SEMI ( e3:expr )? RPAREN
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s:statement
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{
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if ( #e1 == null) { #e1 = #[ NEmptyExpression ]; }
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if ( #e2 == null) { #e2 = #[ NEmptyExpression ]; }
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if ( #e3 == null) { #e3 = #[ NEmptyExpression ]; }
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## = #( #[LITERAL_for, "for"], #e1, #e2, #e3, #s );
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}
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// Jump statements:
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| "goto"^ expr SEMI!
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| "continue" SEMI!
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| "break" SEMI!
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| "return"^ ( expr )? SEMI!
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|
|
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| ID COLON! (options {warnWhenFollowAmbig=false;}: statement)? { ## = #( #[NLabel], ## ); }
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// GNU allows range expressions in case statements
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| "case"^ ((constExpr VARARGS)=> rangeExpr | constExpr) COLON! ( options{warnWhenFollowAmbig=false;}:statement )?
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| "default"^ COLON! ( options{warnWhenFollowAmbig=false;}: statement )?
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|
|
// Selection statements:
|
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|
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| "if"^
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LPAREN! expr RPAREN! statement
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( //standard if-else ambiguity
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options {
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warnWhenFollowAmbig = false;
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} :
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"else" statement )?
|
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| "switch"^ LPAREN! expr RPAREN! statement
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;
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|
|
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conditionalExpr
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: logicalOrExpr
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( QUESTION^ (expr)? COLON conditionalExpr )?
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;
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rangeExpr //used in initializers only
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: constExpr VARARGS constExpr
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{ ## = #(#[NRangeExpr], ##); }
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;
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castExpr
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: ( LPAREN typeName RPAREN )=>
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LPAREN^ typeName RPAREN ( castExpr | lcurlyInitializer )
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{ ##.setType(NCast); }
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| unaryExpr
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;
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nonemptyAbstractDeclarator
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: (
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pointerGroup
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( (LPAREN
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( nonemptyAbstractDeclarator
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| parameterTypeList
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)?
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( COMMA! )?
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RPAREN)
|
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| (LBRACKET (expr)? RBRACKET)
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)*
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|
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| ( (LPAREN
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( nonemptyAbstractDeclarator
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| parameterTypeList
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)?
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( COMMA! )?
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RPAREN)
|
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| (LBRACKET (expr)? RBRACKET)
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)+
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)
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{ ## = #( #[NNonemptyAbstractDeclarator], ## ); }
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;
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unaryExpr
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: postfixExpr
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| INC^ castExpr
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| DEC^ castExpr
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| u:unaryOperator castExpr { ## = #( #[NUnaryExpr], ## ); }
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| "sizeof"^
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( ( LPAREN typeName )=> LPAREN typeName RPAREN
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| unaryExpr
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)
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| "__alignof"^
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( ( LPAREN typeName )=> LPAREN typeName RPAREN
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| unaryExpr
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)
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| gnuAsmExpr
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;
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unaryOperator
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: BAND
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| STAR
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| PLUS
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| MINUS
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| BNOT //also stands for complex conjugation
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| LNOT
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| LAND //for label dereference (&&label)
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| "__real"
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| "__imag"
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|
;
|
|
|
|
gnuAsmExpr
|
|
: "asm"^ ("volatile")?
|
|
LPAREN stringConst
|
|
( options { warnWhenFollowAmbig = false; }:
|
|
COLON (strOptExprPair ( COMMA strOptExprPair)* )?
|
|
( options { warnWhenFollowAmbig = false; }:
|
|
COLON (strOptExprPair ( COMMA strOptExprPair)* )?
|
|
)?
|
|
)?
|
|
( COLON stringConst ( COMMA stringConst)* )?
|
|
RPAREN
|
|
{ ##.setType(NGnuAsmExpr); }
|
|
;
|
|
|
|
//GCC requires the PARENs
|
|
strOptExprPair
|
|
: stringConst ( LPAREN expr RPAREN )?
|
|
;
|
|
|
|
|
|
primaryExpr
|
|
: ID
|
|
| Number
|
|
| charConst
|
|
| stringConst
|
|
// JTC:
|
|
// ID should catch the enumerator
|
|
// leaving it in gives ambiguous err
|
|
// | enumerator
|
|
| (LPAREN LCURLY) => LPAREN^ compoundStatement[getAScopeName()] RPAREN
|
|
| LPAREN^ expr RPAREN { ##.setType(NExpressionGroup); }
|
|
;
|
|
|
|
|
|
{
|
|
// import CToken;
|
|
import java.io.*;
|
|
// import LineObject;
|
|
import antlr.*;
|
|
}
|
|
|
|
class WLexer extends StdCLexer;
|
|
options
|
|
{
|
|
k = 3;
|
|
importVocab = W;
|
|
testLiterals = false;
|
|
}
|
|
tokens {
|
|
LITERAL___extension__ = "__extension__";
|
|
}
|
|
|
|
{
|
|
public void initialize(String src)
|
|
{
|
|
setOriginalSource(src);
|
|
initialize();
|
|
}
|
|
|
|
public void initialize()
|
|
{
|
|
literals.put(new ANTLRHashString("__alignof__", this), new Integer(LITERAL___alignof));
|
|
literals.put(new ANTLRHashString("__asm", this), new Integer(LITERAL_asm));
|
|
literals.put(new ANTLRHashString("__asm__", this), new Integer(LITERAL_asm));
|
|
literals.put(new ANTLRHashString("__attribute__", this), new Integer(LITERAL___attribute));
|
|
literals.put(new ANTLRHashString("__complex__", this), new Integer(LITERAL___complex));
|
|
literals.put(new ANTLRHashString("__const", this), new Integer(LITERAL_const));
|
|
literals.put(new ANTLRHashString("__const__", this), new Integer(LITERAL_const));
|
|
literals.put(new ANTLRHashString("__imag__", this), new Integer(LITERAL___imag));
|
|
literals.put(new ANTLRHashString("__inline", this), new Integer(LITERAL_inline));
|
|
literals.put(new ANTLRHashString("__inline__", this), new Integer(LITERAL_inline));
|
|
literals.put(new ANTLRHashString("__real__", this), new Integer(LITERAL___real));
|
|
literals.put(new ANTLRHashString("__signed", this), new Integer(LITERAL_signed));
|
|
literals.put(new ANTLRHashString("__signed__", this), new Integer(LITERAL_signed));
|
|
literals.put(new ANTLRHashString("__typeof", this), new Integer(LITERAL_typeof));
|
|
literals.put(new ANTLRHashString("__typeof__", this), new Integer(LITERAL_typeof));
|
|
literals.put(new ANTLRHashString("__volatile", this), new Integer(LITERAL_volatile));
|
|
literals.put(new ANTLRHashString("__volatile__", this), new Integer(LITERAL_volatile));
|
|
}
|
|
|
|
|
|
LineObject lineObject = new LineObject();
|
|
String originalSource = "";
|
|
PreprocessorInfoChannel preprocessorInfoChannel = new PreprocessorInfoChannel();
|
|
int tokenNumber = 0;
|
|
boolean countingTokens = true;
|
|
int deferredLineCount = 0;
|
|
|
|
public void setCountingTokens(boolean ct)
|
|
{
|
|
countingTokens = ct;
|
|
if ( countingTokens ) {
|
|
tokenNumber = 0;
|
|
}
|
|
else {
|
|
tokenNumber = 1;
|
|
}
|
|
}
|
|
|
|
public void setOriginalSource(String src)
|
|
{
|
|
originalSource = src;
|
|
lineObject.setSource(src);
|
|
}
|
|
public void setSource(String src)
|
|
{
|
|
lineObject.setSource(src);
|
|
}
|
|
|
|
public PreprocessorInfoChannel getPreprocessorInfoChannel()
|
|
{
|
|
return preprocessorInfoChannel;
|
|
}
|
|
|
|
public void setPreprocessingDirective(String pre)
|
|
{
|
|
preprocessorInfoChannel.addLineForTokenNumber( pre, new Integer(tokenNumber) );
|
|
}
|
|
|
|
protected Token makeToken(int t)
|
|
{
|
|
if ( t != Token.SKIP && countingTokens) {
|
|
tokenNumber++;
|
|
}
|
|
CToken tok = (CToken) super.makeToken(t);
|
|
tok.setLine(lineObject.line);
|
|
tok.setSource(lineObject.source);
|
|
tok.setTokenNumber(tokenNumber);
|
|
|
|
lineObject.line += deferredLineCount;
|
|
deferredLineCount = 0;
|
|
return tok;
|
|
}
|
|
|
|
public void deferredNewline() {
|
|
deferredLineCount++;
|
|
}
|
|
|
|
public void newline() {
|
|
lineObject.newline();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
Whitespace
|
|
: ( ( ' ' | '\t' | '\014')
|
|
| "\r\n" { newline(); }
|
|
| ( '\n' | '\r' ) { newline(); }
|
|
) { _ttype = Token.SKIP; }
|
|
;
|
|
|
|
|
|
protected
|
|
Escape
|
|
: '\\'
|
|
( options{warnWhenFollowAmbig=false;}:
|
|
~('0'..'7' | 'x')
|
|
| ('0'..'3') ( options{warnWhenFollowAmbig=false;}: Digit )*
|
|
| ('4'..'7') ( options{warnWhenFollowAmbig=false;}: Digit )*
|
|
| 'x' ( options{warnWhenFollowAmbig=false;}: Digit | 'a'..'f' | 'A'..'F' )+
|
|
)
|
|
;
|
|
|
|
protected IntSuffix
|
|
: 'L'
|
|
| 'l'
|
|
| 'U'
|
|
| 'u'
|
|
| 'I'
|
|
| 'i'
|
|
| 'J'
|
|
| 'j'
|
|
;
|
|
protected NumberSuffix
|
|
:
|
|
IntSuffix
|
|
| 'F'
|
|
| 'f'
|
|
;
|
|
|
|
Number
|
|
: ( ( Digit )+ ( '.' | 'e' | 'E' ) )=> ( Digit )+
|
|
( '.' ( Digit )* ( Exponent )?
|
|
| Exponent
|
|
)
|
|
( NumberSuffix
|
|
)*
|
|
|
|
| ( "..." )=> "..." { _ttype = VARARGS; }
|
|
|
|
| '.' { _ttype = DOT; }
|
|
( ( Digit )+ ( Exponent )?
|
|
{ _ttype = Number; }
|
|
( NumberSuffix
|
|
)*
|
|
)?
|
|
|
|
| '0' ( '0'..'7' )*
|
|
( NumberSuffix
|
|
)*
|
|
|
|
| '1'..'9' ( Digit )*
|
|
( NumberSuffix
|
|
)*
|
|
|
|
| '0' ( 'x' | 'X' ) ( 'a'..'f' | 'A'..'F' | Digit )+
|
|
( IntSuffix
|
|
)*
|
|
;
|
|
|
|
IDMEAT
|
|
:
|
|
i:ID {
|
|
|
|
if ( i.getType() == LITERAL___extension__ ) {
|
|
$setType(Token.SKIP);
|
|
}
|
|
else {
|
|
$setType(i.getType());
|
|
}
|
|
|
|
}
|
|
;
|
|
|
|
protected ID
|
|
options
|
|
{
|
|
testLiterals = true;
|
|
}
|
|
: ( 'a'..'z' | 'A'..'Z' | '_' | '$')
|
|
( 'a'..'z' | 'A'..'Z' | '_' | '$' | '0'..'9' )*
|
|
;
|
|
|
|
WideCharLiteral
|
|
:
|
|
'L' CharLiteral
|
|
{ $setType(CharLiteral); }
|
|
;
|
|
|
|
|
|
|
|
WideStringLiteral
|
|
:
|
|
'L' StringLiteral
|
|
{ $setType(StringLiteral); }
|
|
;
|
|
|
|
StringLiteral
|
|
:
|
|
'"'
|
|
( ('\\' ~('\n'))=> Escape
|
|
| ( '\r' { newline(); }
|
|
| '\n' {
|
|
newline();
|
|
}
|
|
| '\\' '\n' {
|
|
newline();
|
|
}
|
|
)
|
|
| ~( '"' | '\r' | '\n' | '\\' )
|
|
)*
|
|
'"'
|
|
;
|
|
|
|
|
|
|
|
|