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/** \file
* Implementation of the base functionality for an ANTLR3 parser.
*/
// [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 <antlr3parser.h>
/* Parser API
*/
static void setDebugListener (pANTLR3_PARSER parser, pANTLR3_DEBUG_EVENT_LISTENER dbg);
static void setTokenStream (pANTLR3_PARSER parser, pANTLR3_TOKEN_STREAM);
static pANTLR3_TOKEN_STREAM getTokenStream (pANTLR3_PARSER parser);
static void freeParser (pANTLR3_PARSER parser);
ANTLR3_API pANTLR3_PARSER
antlr3ParserNewStreamDbg (ANTLR3_UINT32 sizeHint, pANTLR3_TOKEN_STREAM tstream, pANTLR3_DEBUG_EVENT_LISTENER dbg, pANTLR3_RECOGNIZER_SHARED_STATE state)
{
pANTLR3_PARSER parser;
parser = antlr3ParserNewStream(sizeHint, tstream, state);
if (parser == NULL)
{
return NULL;
}
parser->setDebugListener(parser, dbg);
return parser;
}
ANTLR3_API pANTLR3_PARSER
antlr3ParserNew (ANTLR3_UINT32 sizeHint, pANTLR3_RECOGNIZER_SHARED_STATE state)
{
pANTLR3_PARSER parser;
/* Allocate memory
*/
parser = (pANTLR3_PARSER) ANTLR3_MALLOC(sizeof(ANTLR3_PARSER));
if (parser == NULL)
{
return NULL;
}
/* Install a base parser
*/
parser->rec = antlr3BaseRecognizerNew(ANTLR3_TYPE_PARSER, sizeHint, state);
if (parser->rec == NULL)
{
parser->free(parser);
return NULL;
}
parser->rec->super = parser;
/* Parser overrides
*/
parser->rec->exConstruct = antlr3MTExceptionNew;
/* Install the API
*/
parser->setDebugListener = setDebugListener;
parser->setTokenStream = setTokenStream;
parser->getTokenStream = getTokenStream;
parser->free = freeParser;
return parser;
}
ANTLR3_API pANTLR3_PARSER
antlr3ParserNewStream (ANTLR3_UINT32 sizeHint, pANTLR3_TOKEN_STREAM tstream, pANTLR3_RECOGNIZER_SHARED_STATE state)
{
pANTLR3_PARSER parser;
parser = antlr3ParserNew(sizeHint, state);
if (parser == NULL)
{
return NULL;
}
/* Everything seems to be hunky dory so we can install the
* token stream.
*/
parser->setTokenStream(parser, tstream);
return parser;
}
static void
freeParser (pANTLR3_PARSER parser)
{
if (parser->rec != NULL)
{
// This may have ben a delegate or delegator parser, in which case the
// state may already have been freed (and set to NULL therefore)
// so we ignore the state if we don't have it.
//
if (parser->rec->state != NULL)
{
if (parser->rec->state->following != NULL)
{
parser->rec->state->following->free(parser->rec->state->following);
parser->rec->state->following = NULL;
}
}
parser->rec->free(parser->rec);
parser->rec = NULL;
}
ANTLR3_FREE(parser);
}
static void
setDebugListener (pANTLR3_PARSER parser, pANTLR3_DEBUG_EVENT_LISTENER dbg)
{
// Set the debug listener. There are no methods to override
// because currently the only ones that notify the debugger
// are error reporting and recovery. Hence we can afford to
// check and see if the debugger interface is null or not
// there. If there is ever an occasion for a performance
// sensitive function to use the debugger interface, then
// a replacement function for debug mode should be supplied
// and installed here.
//
parser->rec->debugger = dbg;
// If there was a tokenstream installed already
// then we need to tell it about the debug interface
//
if (parser->tstream != NULL)
{
parser->tstream->setDebugListener(parser->tstream, dbg);
}
}
static void
setTokenStream (pANTLR3_PARSER parser, pANTLR3_TOKEN_STREAM tstream)
{
parser->tstream = tstream;
parser->rec->reset(parser->rec);
}
static pANTLR3_TOKEN_STREAM
getTokenStream (pANTLR3_PARSER parser)
{
return parser->tstream;
}
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