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/********************* */
/** antlr_input.cpp
** Original author: cconway
** Major contributors: none
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.
**
** A super-class for ANTLR-generated input language parsers
**/
#include <limits.h>
#include <antlr3.h>
#include "antlr_input.h"
#include "bounded_token_buffer.h"
#include "bounded_token_factory.h"
#include "memory_mapped_input_buffer.h"
#include "parser_exception.h"
#include "parser_state.h"
#include "util/output.h"
#include "util/Assert.h"
#include "expr/command.h"
#include "expr/type.h"
using namespace std;
using namespace CVC4;
using namespace CVC4::parser;
using namespace CVC4::kind;
namespace CVC4 {
namespace parser {
AntlrInput::AntlrInput(ExprManager* exprManager, const std::string& filename, unsigned int lookahead, bool useMmap) :
Input(exprManager, filename),
d_lookahead(lookahead),
d_lexer(NULL),
d_parser(NULL),
d_tokenStream(NULL) {
if( useMmap ) {
d_input = MemoryMappedInputBufferNew(filename);
} else {
d_input = antlr3AsciiFileStreamNew((pANTLR3_UINT8) filename.c_str());
}
if( d_input == NULL ) {
throw ParserException("Couldn't open file: " + filename);
}
}
/*
AntlrParser::AntlrParser(ExprManager* exprManager, std::istream& input, const std::string& name, unsigned int lookahead)
Parser(exprManager,name),
d_lookahead(lookahead) {
}
*/
AntlrInput::AntlrInput(ExprManager* exprManager, const std::string& input, const std::string& name, unsigned int lookahead) :
Input(exprManager,name),
d_lookahead(lookahead),
d_lexer(NULL),
d_parser(NULL),
d_tokenStream(NULL) {
char* inputStr = strdup(input.c_str());
char* nameStr = strdup(name.c_str());
if( inputStr==NULL || nameStr==NULL ) {
throw ParserException("Couldn't initialize string input: '" + input + "'");
}
d_input = antlr3NewAsciiStringInPlaceStream((pANTLR3_UINT8)inputStr,input.size(),(pANTLR3_UINT8)nameStr);
if( d_input == NULL ) {
throw ParserException("Couldn't create input stream for string: '" + input + "'");
}
}
AntlrInput::~AntlrInput() {
d_tokenStream->free(d_tokenStream);
d_input->close(d_input);
}
pANTLR3_INPUT_STREAM AntlrInput::getInputStream() {
return d_input;
}
pANTLR3_COMMON_TOKEN_STREAM AntlrInput::getTokenStream() {
return d_tokenStream;
}
void AntlrInput::parseError(const std::string& message)
throw (ParserException) {
Debug("parser") << "Throwing exception: "
<< getParserState()->getFilename() << ":"
<< d_lexer->getLine(d_lexer) << "."
<< d_lexer->getCharPositionInLine(d_lexer) << ": "
<< message << endl;
throw ParserException(message, getParserState()->getFilename(),
d_lexer->getLine(d_lexer),
d_lexer->getCharPositionInLine(d_lexer));
}
void AntlrInput::setLexer(pANTLR3_LEXER pLexer) {
d_lexer = pLexer;
pANTLR3_TOKEN_FACTORY pTokenFactory = d_lexer->rec->state->tokFactory;
if( pTokenFactory != NULL ) {
pTokenFactory->close(pTokenFactory);
}
/* 2*lookahead should be sufficient, but we give ourselves some breathing room. */
pTokenFactory = BoundedTokenFactoryNew(d_input, 2*d_lookahead);
if( pTokenFactory == NULL ) {
throw ParserException("Couldn't create token factory.");
}
d_lexer->rec->state->tokFactory = pTokenFactory;
pBOUNDED_TOKEN_BUFFER buffer = BoundedTokenBufferSourceNew(d_lookahead, d_lexer->rec->state->tokSource);
if( buffer == NULL ) {
throw ParserException("Couldn't create token buffer.");
}
d_tokenStream = buffer->commonTstream;
}
void AntlrInput::setParser(pANTLR3_PARSER pParser) {
d_parser = pParser;
// ANTLR isn't using super, AFAICT.
// We could also use @parser::context to add a field to the generated parser, but then
// it would have to be declared separately in every input's grammar and we'd have to
// pass it in as an address anyway.
d_parser->super = getParserState();
d_parser->rec->reportError = &reportError;
d_parser->rec->recoverFromMismatchedToken = &recoverFromMismatchedToken;
}
}/* CVC4::parser namespace */
}/* CVC4 namespace */
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