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/*
* Copyright 2007 Adrian Thurston <thurston@complang.org>
*/
/* This file is part of Colm.
*
* Colm is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Colm is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Colm; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _RLSCAN_H
#define _RLSCAN_H
#include <iostream>
#include <fstream>
#include <string.h>
#include "colm.h"
#include "lmparse.h"
#include "parsedata.h"
#include "avltree.h"
#include "vector.h"
#include "buffer.h"
using std::ifstream;
using std::istream;
using std::ostream;
using std::cout;
using std::cerr;
using std::endl;
extern char *Parser_lelNames[];
/* This is used for tracking the current stack of include file/machine pairs. It is
* is used to detect and recursive include structure. */
struct IncludeStackItem
{
IncludeStackItem( const char *fileName )
: fileName(fileName) {}
const char *fileName;
};
typedef Vector<IncludeStackItem> IncludeStack;
typedef Vector<const char *> ArgsVector;
extern ArgsVector includePaths;
struct Scanner
{
Scanner( const char *fileName, istream &input,
ostream &output, Parser *includeToParser, int includeDepth )
:
fileName(fileName), input(input), output(output),
includeDepth(includeDepth),
line(1), column(1), lastnl(0),
parserExistsError(false),
whitespaceOn(true)
{
if ( includeToParser != 0 )
parser = includeToParser;
else {
parser = new Parser( fileName, "machine", InputLoc() );
parser->init();
}
}
ifstream *tryOpenInclude( char **pathChecks, long &found );
char **makeIncludePathChecks( const char *thisFileName, const char *fileName );
bool recursiveInclude( const char *inclFileName );
void sectionParseInit();
void token( int type, char *start, char *end );
void token( int type, char c );
void token( int type );
void updateCol();
void endSection();
void scan();
void eof();
ostream &scan_error();
const char *fileName;
istream &input;
ostream &output;
int includeDepth;
int cs;
int line;
char *word, *lit;
int word_len, lit_len;
InputLoc sectionLoc;
char *ts, *te;
int column;
char *lastnl;
/* Set by machine statements, these persist from section to section
* allowing for unnamed sections. */
Parser *parser;
IncludeStack includeStack;
/* This is set if ragel has already emitted an error stating that
* no section name has been seen and thus no parser exists. */
bool parserExistsError;
/* This is for inline code. By default it is on. It goes off for
* statements and values in inline blocks which are parsed. */
bool whitespaceOn;
Buffer litBuf;
};
#endif /* _RLSCAN_H */
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