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/********************* */
/** 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 "input.h"
#include "bounded_token_buffer.h"
#include "bounded_token_factory.h"
#include "memory_mapped_input_buffer.h"
#include "parser_exception.h"
#include "parser.h"
#include "expr/command.h"
#include "expr/type.h"
#include "parser/cvc/cvc_input.h"
#include "parser/smt/smt_input.h"
#include "parser/smt2/smt2_input.h"
#include "util/output.h"
#include "util/Assert.h"
using namespace std;
using namespace CVC4;
using namespace CVC4::parser;
using namespace CVC4::kind;
namespace CVC4 {
namespace parser {
AntlrInputStream::AntlrInputStream(std::string name, pANTLR3_INPUT_STREAM input) :
InputStream(name),
d_input(input) {
AlwaysAssert( input != NULL );
}
AntlrInputStream::~AntlrInputStream() {
d_input->free(d_input);
}
pANTLR3_INPUT_STREAM AntlrInputStream::getAntlr3InputStream() const {
return d_input;
}
AntlrInputStream* AntlrInputStream::newFileInputStream(const std::string& name, bool useMmap)
throw (InputStreamException) {
pANTLR3_INPUT_STREAM input = NULL;
if( useMmap ) {
input = MemoryMappedInputBufferNew(name);
} else {
input = antlr3AsciiFileStreamNew((pANTLR3_UINT8) name.c_str());
}
if( input == NULL ) {
throw InputStreamException("Couldn't open file: " + name);
}
return new AntlrInputStream( name, input );
}
AntlrInputStream* AntlrInputStream::newStringInputStream(const std::string& input, const std::string& name)
throw (InputStreamException) {
char* inputStr = strdup(input.c_str());
char* nameStr = strdup(name.c_str());
AlwaysAssert( inputStr!=NULL && nameStr!=NULL );
pANTLR3_INPUT_STREAM inputStream =
antlr3NewAsciiStringInPlaceStream((pANTLR3_UINT8) inputStr,
input.size(),
(pANTLR3_UINT8) nameStr);
if( inputStream==NULL ) {
throw InputStreamException("Couldn't initialize string input: '" + input + "'");
}
return new AntlrInputStream( name, inputStream );
}
AntlrInput* AntlrInput::newInput(InputLanguage lang, AntlrInputStream& inputStream) {
AntlrInput* input;
switch(lang) {
case LANG_CVC4: {
input = new CvcInput(inputStream);
break;
}
case LANG_SMTLIB:
input = new SmtInput(inputStream);
break;
case LANG_SMTLIB_V2:
input = new Smt2Input(inputStream);
break;
default:
Unhandled(lang);
}
return input;
}
AntlrInput::AntlrInput(AntlrInputStream& inputStream, unsigned int lookahead) :
Input(inputStream),
d_lookahead(lookahead),
d_lexer(NULL),
d_parser(NULL),
d_antlr3InputStream( inputStream.getAntlr3InputStream() ),
d_tokenStream(NULL) {
}
/*
AntlrParser::AntlrParser(ExprManager* exprManager, std::istream& input, const std::string& name, unsigned int lookahead)
Parser(exprManager,name),
d_lookahead(lookahead) {
}
*/
/*
AntlrInput::Input(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_inputStream = antlr3NewAsciiStringInPlaceStream((pANTLR3_UINT8)inputStr,input.size(),(pANTLR3_UINT8)nameStr);
if( d_inputStream == NULL ) {
throw ParserException("Couldn't create input stream for string: '" + input + "'");
}
}
*/
AntlrInput::~AntlrInput() {
d_tokenStream->free(d_tokenStream);
}
pANTLR3_COMMON_TOKEN_STREAM AntlrInput::getTokenStream() {
return d_tokenStream;
}
void AntlrInput::lexerError(pANTLR3_BASE_RECOGNIZER recognizer) {
pANTLR3_LEXER lexer = (pANTLR3_LEXER)(recognizer->super);
AlwaysAssert(lexer!=NULL);
Parser *parser = (Parser*)(lexer->super);
AlwaysAssert(parser!=NULL);
AntlrInput *input = (AntlrInput*) parser->getInput();
AlwaysAssert(input!=NULL);
/* Call the error display routine *if* there's not already a
* parse error pending. If a parser error is pending, this
* error is probably less important, so we just drop it. */
if( input->d_parser->rec->state->error == ANTLR3_FALSE ) {
input->parseError("Error finding next token.");
}
}
void AntlrInput::parseError(const std::string& message)
throw (ParserException) {
Debug("parser") << "Throwing exception: "
<< getInputStream()->getName() << ":"
<< d_lexer->getLine(d_lexer) << "."
<< d_lexer->getCharPositionInLine(d_lexer) << ": "
<< message << endl;
throw ParserException(message, getInputStream()->getName(),
d_lexer->getLine(d_lexer),
d_lexer->getCharPositionInLine(d_lexer));
}
void AntlrInput::setAntlr3Lexer(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_antlr3InputStream, 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;
// Override default lexer error reporting
d_lexer->rec->reportError = &lexerError;
// Override default nextToken function, just to prevent exceptions escaping.
d_lexer->rec->state->tokSource->nextToken = &nextTokenStr;
}
void AntlrInput::setParser(Parser& parser) {
// ANTLR isn't using super in the lexer or the parser, AFAICT.
// We could also use @lexer/parser::context to add a field to the generated
// objects, but then it would have to be declared separately in every
// language's grammar and we'd have to in the address of the field anyway.
d_lexer->super = &parser;
d_parser->super = &parser;
}
void AntlrInput::setAntlr3Parser(pANTLR3_PARSER pParser) {
d_parser = pParser;
// d_parser->rec->match = &match;
d_parser->rec->reportError = &reportError;
/* Don't try to recover from a parse error. */
// [chris 4/5/2010] Not clear on why this cast is necessary, but I get an error if I remove it.
d_parser->rec->recoverFromMismatchedToken =
(void* (*)(ANTLR3_BASE_RECOGNIZER_struct*, ANTLR3_UINT32, ANTLR3_BITSET_LIST_struct*))
d_parser->rec->mismatch;
}
}/* CVC4::parser namespace */
}/* CVC4 namespace */
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