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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Copyright (c) Non, Inc. 1998 -- All Rights Reserved
PROJECT: C Compiler
MODULE: GnuCParser
FILE: GnuCParser.g
AUTHOR: Monty Zukowski ([email protected]) April 28, 1998
DESCRIPTION:
This is a grammar for the GNU C compiler. It is a
grammar subclass of StdCParser, overriding only those
rules which are different from Standard C.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
header {
package com.jogamp.gluegen.cgram;
import java.io.*;
import antlr.CommonAST;
import antlr.DumpASTVisitor;
import com.jogamp.gluegen.ASTLocusTag;
}
class GnuCParser extends StdCParser;
options
{
k = 2;
exportVocab = GNUC;
buildAST = true;
ASTLabelType = "TNode";
// Copied following options from java grammar.
codeGenMakeSwitchThreshold = 2;
codeGenBitsetTestThreshold = 3;
}
{
// Suppport C++-style single-line comments?
public static boolean CPPComments = true;
// access to symbol table
public CSymbolTable symbolTable = new CSymbolTable();
// source for names to unnamed scopes
protected int unnamedScopeCounter = 0;
public boolean isTypedefName(String name) {
boolean returnValue = false;
TNode node = symbolTable.lookupNameInCurrentScope(name);
for (; node != null; node = (TNode) node.getNextSibling() ) {
if(node.getType() == LITERAL_typedef) {
returnValue = true;
break;
}
}
return returnValue;
}
public String getAScopeName() {
return "" + (unnamedScopeCounter++);
}
public void pushScope(String scopeName) {
symbolTable.pushScope(scopeName);
}
public void popScope() {
symbolTable.popScope();
}
int traceDepth = 0;
public void reportError(RecognitionException ex) {
try {
System.err.println("ANTLR Parsing Error: "+ex + " token name:" + tokenNames[LA(1)]);
ex.printStackTrace(System.err);
}
catch (TokenStreamException e) {
System.err.println("ANTLR Parsing Error: "+ex);
ex.printStackTrace(System.err);
}
}
public void reportError(String s) {
System.err.println("ANTLR Parsing Error from String: " + s);
}
public void reportWarning(String s) {
System.err.println("ANTLR Parsing Warning from String: " + s);
}
public void match(int t) throws MismatchedTokenException {
boolean debugging = false;
if ( debugging ) {
for (int x=0; x0)?" [inputState.guessing "+ inputState.guessing + "]":""));
}
}
try {
if ( LA(1)!=t ) {
if ( debugging ){
for (int x=0; x "+rname+"; LA(1)==("+ tokenNames[LT(1).getType()]
+ ") " + LT(1).getText() + " [inputState.guessing "+ inputState.guessing + "]");
}
catch (TokenStreamException e) {
}
}
public void traceOut(String rname) {
for (int x=0; x declaration
| ( functionPrefix )=> functionDef
| typelessDeclaration
| asm_expr
| SEMI
;
/* these two are here because GCC allows "cat = 13;" as a valid program! */
functionPrefix
{ String declName; }
: ( (functionDeclSpecifiers)=> ds:functionDeclSpecifiers
| //epsilon
)
declName = d:declarator[true]
( declaration )* (VARARGS)? ( SEMI )*
LCURLY
;
typelessDeclaration
{ AST typeMissing = #[NTypeMissing]; }
: initDeclList[typeMissing] SEMI { ## = #( #[NTypeMissing], ##); }
;
initializer
: ( ( ( (initializerElementLabel)=> initializerElementLabel )?
( assignExpr | lcurlyInitializer ) { ## = #( #[NInitializer], ## ); }
)
| lcurlyInitializer
)
;
// GCC allows more specific initializers
initializerElementLabel
: ( ( LBRACKET ((constExpr VARARGS)=> rangeExpr | constExpr) RBRACKET (ASSIGN)? )
| ID COLON
| DOT ID ASSIGN
)
{ ## = #( #[NInitializerElementLabel], ##) ; }
;
// GCC allows empty initializer lists
lcurlyInitializer
:
LCURLY^ (initializerList ( COMMA! )? )? RCURLY
{ ##.setType( NLcurlyInitializer ); }
;
initializerList
: initializer ( options{warnWhenFollowAmbig=false;}:COMMA! initializer )*
;
declarator[boolean isFunctionDefinition] returns [String declName]
{ declName = ""; }
:
( pointerGroup )?
( id:ID { declName = id.getText(); }
| LPAREN declName = declarator[false] RPAREN
)
( declaratorParamaterList[isFunctionDefinition, declName]
| LBRACKET ( expr )? RBRACKET
)*
{ ## = #( #[NDeclarator], ## ); }
;
declaratorParamaterList[boolean isFunctionDefinition, String declName]
:
LPAREN^
{
if (isFunctionDefinition) {
pushScope(declName);
}
else {
pushScope("!"+declName);
}
}
(
(declSpecifiers)=> parameterTypeList
| (idList)?
)
{
popScope();
}
( COMMA! )?
RPAREN
{ ##.setType(NParameterTypeList); }
;
parameterTypeList
: parameterDeclaration
( options {
warnWhenFollowAmbig = false;
} :
( COMMA | SEMI )
parameterDeclaration
)*
( ( COMMA | SEMI )
VARARGS
)?
;
declarationList
: ( options { // this loop properly aborts when
// it finds a non-typedefName ID MBZ
warnWhenFollowAmbig = false;
} :
localLabelDeclaration
| ( declarationPredictor )=> declaration
)+
;
localLabelDeclaration
: ( //GNU note: any __label__ declarations must come before regular declarations.
"__label__"^ ID (options{warnWhenFollowAmbig=false;}: COMMA! ID)* ( COMMA! )? ( SEMI! )+
)
;
declaration
{ AST ds1 = null; }
: ds:declSpecifiers { ds1 = astFactory.dupList(#ds); }
(
initDeclList[ds1]
)?
( SEMI )+
{ ## = #( #[NDeclaration], ##); }
;
functionStorageClassSpecifier
: "extern"
| "static"
| "inline"
;
typeSpecifier [int specCount] returns [int retSpecCount]
{ retSpecCount = specCount + 1; }
:
( "void"
| "char"
| "short"
| "int"
| "long"
| "float"
| "double"
| "signed"
| "unsigned"
| "int8_t"
| "uint8_t"
| "int16_t"
| "uint16_t"
| "__int32"
| "int32_t"
| "wchar_t"
| "uint32_t"
| "__int64"
| "int64_t"
| "uint64_t"
| "ptrdiff_t"
| "intptr_t"
| "size_t"
| "uintptr_t"
| structOrUnionSpecifier ( options{warnWhenFollowAmbig=false;}: attributeDecl )*
| enumSpecifier
| { specCount==0 }? typedefName
| "typeof"^ LPAREN
( ( typeName )=> typeName
| expr
)
RPAREN
| "__complex"
)
;
structOrUnionSpecifier
{ String scopeName; }
: sou:structOrUnion!
( ( ID LCURLY )=> i:ID l:LCURLY
{
scopeName = #sou.getText() + " " + #i.getText();
#l.setText(scopeName);
pushScope(scopeName);
}
( structDeclarationList )?
{ popScope();}
RCURLY
| l1:LCURLY
{
scopeName = getAScopeName();
#l1.setText(scopeName);
pushScope(scopeName);
}
( structDeclarationList )?
{ popScope(); }
RCURLY
| ID
)
{
## = #( #sou, ## );
}
;
structDeclaration
: specifierQualifierList structDeclaratorList ( COMMA! )? ( SEMI! )+
;
structDeclaratorList
: structDeclarator ( options{warnWhenFollowAmbig=false;}: COMMA! structDeclarator )*
;
structDeclarator
: ( declarator[false] )?
( COLON constExpr )?
( attributeDecl )*
{ ## = #( #[NStructDeclarator], ##); }
;
enumSpecifier
: "enum"^
( ( ID LCURLY )=> i:ID LCURLY enumList[i.getText()] RCURLY
| LCURLY enumList["anonymous"] RCURLY
| ID
)
;
enumList[String enumName]
: enumerator[enumName] ( options{warnWhenFollowAmbig=false;}: COMMA! enumerator[enumName] )* ( COMMA! )?
;
initDeclList[AST declarationSpecifiers]
: initDecl[declarationSpecifiers]
( options{warnWhenFollowAmbig=false;}: COMMA! initDecl[declarationSpecifiers] )*
( COMMA! )?
;
initDecl[AST declarationSpecifiers]
{ String declName = ""; }
: declName = d:declarator[false]
{ AST ds1, d1;
ds1 = astFactory.dupList(declarationSpecifiers);
d1 = astFactory.dupList(#d);
symbolTable.add(declName, #(null, ds1, d1) );
}
( attributeDecl )*
( ASSIGN initializer
| COLON expr
)?
{ ## = #( #[NInitDecl], ## ); }
;
attributeDecl
: "__attribute"^ LPAREN LPAREN attributeList RPAREN RPAREN
| "asm"^ LPAREN stringConst RPAREN { ##.setType( NAsmAttribute ); }
;
attributeList
: attribute ( options{warnWhenFollowAmbig=false;}: COMMA attribute)* ( COMMA )?
;
attribute
: ( ~(LPAREN | RPAREN | COMMA)
| LPAREN attributeList RPAREN
)*
;
compoundStatement[String scopeName]
: LCURLY^
{
pushScope(scopeName);
}
( //this ambiguity is ok, declarationList and nestedFunctionDef end properly
options {
warnWhenFollowAmbig = false;
} :
( "typedef" | "__label__" | declaration )=> declarationList
| (nestedFunctionDef)=> nestedFunctionDef
)*
( statementList )?
{ popScope(); }
RCURLY
{ ##.setType( NCompoundStatement ); ##.setAttribute( "scopeName", scopeName ); }
;
nestedFunctionDef
{ String declName; }
: ( "auto" )? //only for nested functions
( (functionDeclSpecifiers)=> ds:functionDeclSpecifiers
)?
declName = d:declarator[false]
{
AST d2, ds2;
d2 = astFactory.dupList(#d);
ds2 = astFactory.dupList(#ds);
symbolTable.add(declName, #(null, ds2, d2));
pushScope(declName);
}
( declaration )*
{ popScope(); }
compoundStatement[declName]
{ ## = #( #[NFunctionDef], ## );}
;
statement
: SEMI // Empty statements
| compoundStatement[getAScopeName()] // Group of statements
| expr SEMI! { ## = #( #[NStatementExpr], ## );} // Expressions
// Iteration statements:
| "while"^ LPAREN! expr RPAREN! statement
| "do"^ statement "while"! LPAREN! expr RPAREN! SEMI!
|! "for"
LPAREN ( e1:expr )? SEMI ( e2:expr )? SEMI ( e3:expr )? RPAREN
s:statement
{
if ( #e1 == null) { #e1 = (TNode) #[ NEmptyExpression ]; }
if ( #e2 == null) { #e2 = (TNode) #[ NEmptyExpression ]; }
if ( #e3 == null) { #e3 = (TNode) #[ NEmptyExpression ]; }
## = #( #[LITERAL_for, "for"], #e1, #e2, #e3, #s );
}
// Jump statements:
| "goto"^ expr SEMI!
| "continue" SEMI!
| "break" SEMI!
| "return"^ ( expr )? SEMI!
| ID COLON! (options {warnWhenFollowAmbig=false;}: statement)? { ## = #( #[NLabel], ## ); }
// GNU allows range expressions in case statements
| "case"^ ((constExpr VARARGS)=> rangeExpr | constExpr) COLON! ( options{warnWhenFollowAmbig=false;}:statement )?
| "default"^ COLON! ( options{warnWhenFollowAmbig=false;}: statement )?
// Selection statements:
| "if"^
LPAREN! expr RPAREN! statement
( //standard if-else ambiguity
options {
warnWhenFollowAmbig = false;
} :
"else" statement )?
| "switch"^ LPAREN! expr RPAREN! statement
;
conditionalExpr
: logicalOrExpr
( QUESTION^ (expr)? COLON conditionalExpr )?
;
rangeExpr //used in initializers only
: constExpr VARARGS constExpr
{ ## = #(#[NRangeExpr], ##); }
;
castExpr
: ( LPAREN typeName RPAREN )=>
LPAREN^ typeName RPAREN ( castExpr | lcurlyInitializer )
{ ##.setType(NCast); }
| unaryExpr
;
nonemptyAbstractDeclarator
: (
pointerGroup
( (LPAREN
( nonemptyAbstractDeclarator
| parameterTypeList
)?
( COMMA! )?
RPAREN)
| (LBRACKET (expr)? RBRACKET)
)*
| ( (LPAREN
( nonemptyAbstractDeclarator
| parameterTypeList
)?
( COMMA! )?
RPAREN)
| (LBRACKET (expr)? RBRACKET)
)+
)
{ ## = #( #[NNonemptyAbstractDeclarator], ## ); }
;
unaryExpr
: postfixExpr
| INC^ castExpr
| DEC^ castExpr
| u:unaryOperator castExpr { ## = #( #[NUnaryExpr], ## ); }
| "sizeof"^
( ( LPAREN typeName )=> LPAREN typeName RPAREN
| unaryExpr
)
| "__alignof"^
( ( LPAREN typeName )=> LPAREN typeName RPAREN
| unaryExpr
)
| gnuAsmExpr
;
unaryOperator
: BAND
| STAR
| PLUS
| MINUS
| BNOT //also stands for complex conjugation
| LNOT
| LAND //for label dereference (&&label)
| "__real"
| "__imag"
;
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 java.io.*;
import java.util.*;
import antlr.*;
}
class GnuCLexer extends StdCLexer;
options
{
k = 3;
importVocab = GNUC;
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;
List defines = new ArrayList();
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) );
}
public void addDefine(String name, String value)
{
defines.add(new Define(name, value, new ASTLocusTag(lineObject.getSource(), lineObject.getLine()+deferredLineCount, -1, name)));
}
/** Returns a list of Define objects corresponding to the
preprocessor definitions seen during parsing. */
public List getDefines() {
return defines;
}
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' | '\\' )
)*
'"'
;