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/*
* Copyright 2007 Adrian Thurston <thurston@cs.queensu.ca>
*/
/* This file is part of Ragel.
*
* Ragel 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.
*
* Ragel 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 Ragel; 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 "rlscan.h"
#include "vector.h"
#include "rlparse.h"
#include "parsedata.h"
#include "avltree.h"
#include "vector.h"
using std::istream;
using std::ostream;
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, char *sectionName )
: fileName(fileName), sectionName(sectionName) {}
const char *fileName;
char *sectionName;
};
typedef Vector<IncludeStackItem> IncludeStack;
inline char* resolvePath(const char* rel, const char* abs) {
const size_t l1 = strlen(rel);
const size_t l2 = strlen(abs);
char* ret = new char[l1 + l2 + 1];
const char* p = strrchr(abs, '/') + 1;
const size_t l3 = p - abs;
memcpy(ret, abs, l3);
strcpy(ret + l3, rel);
return ret;
}
struct Scanner
{
Scanner(const char *fileName, istream &input, ostream &output,
Parser *inclToParser, char *inclSectionTarg,
int includeDepth, bool importMachines )
:
fileName(fileName), input(input), output(output),
inclToParser(inclToParser),
inclSectionTarg(inclSectionTarg),
includeDepth(includeDepth),
importMachines(importMachines),
cur_token(0),
line(1), column(1), lastnl(0),
parser(0), ignoreSection(false),
parserExistsError(false),
whitespaceOn(true),
lastToken(0)
{}
bool recursiveInclude(const char *inclFileName, char *inclSectionName );
char *prepareFileName( char *inclFileName, int len )
{
if (*inclFileName == '\"') {
inclFileName[len - 1] = 0;
++inclFileName;
}
char* res = resolvePath(inclFileName, fileName); // there was a memory leek in the original too
return res;
}
void init();
void token( int type, char *start, char *end );
void token( int type, char c );
void token( int type );
void processToken( int type, char *tokdata, int toklen );
void directToParser( Parser *toParser, const char *tokFileName, int tokLine,
int tokColumn, int type, char *tokdata, int toklen );
void flushImport( );
void importToken( int type, char *start, char *end );
void pass( int token, char *start, char *end );
void pass();
void updateCol();
void startSection();
void endSection();
void do_scan();
bool active();
ostream &scan_error();
const char *fileName;
istream &input;
ostream &output;
Parser *inclToParser;
char *inclSectionTarg;
int includeDepth;
bool importMachines;
/* For import parsing. */
int tok_cs, tok_act;
int *tok_tokstart, *tok_tokend;
int cur_token;
static const int max_tokens = 32;
int token_data[max_tokens];
char *token_strings[max_tokens];
int token_lens[max_tokens];
/* For section processing. */
int cs;
char *word, *lit;
int word_len, lit_len;
/* For character scanning. */
int line;
InputLoc sectionLoc;
char *tokstart, *tokend;
int column;
char *lastnl;
/* Set by machine statements, these persist from section to section
* allowing for unnamed sections. */
Parser *parser;
bool ignoreSection;
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;
/* Keeps a record of the previous token sent to the section parser. */
int lastToken;
};
#endif /* _RLSCAN_H */
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