EvtParser.cpp
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	/***********************************************************************
	* Copyright 1998-2020 CERN for the benefit of the EvtGen authors *
	* *
	* This file is part of EvtGen. *
	* *
	* EvtGen 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 3 of the License, or *
	* (at your option) any later version. *
	* *
	* EvtGen 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 EvtGen. If not, see <https://www.gnu.org/licenses/>. *
	***********************************************************************/

	#include "EvtGenBase/EvtParser.hh"

	#include "EvtGenBase/EvtPatches.hh"
	#include "EvtGenBase/EvtReport.hh"

	#include <fstream>
	#include <sstream>
	#include <string.h>
	using namespace std;

	#define MAXBUF 1024

	EvtParser::EvtParser()
	{
	_ntoken = 0;
	_lengthoftokenlist = 0;
	_tokenlist = 0;
	_linelist = 0;
	}

	EvtParser::~EvtParser()
	{
	delete[] _tokenlist;
	delete[] _linelist;
	}

	int EvtParser::getNToken()
	{
	return _ntoken;
	}

	const std::string& EvtParser::getToken( int i )
	{
	return _tokenlist[i];
	}

	int EvtParser::getLineofToken( int i )
	{
	return _linelist[i];
	}

	int EvtParser::read( const std::string filename )
	{
	ifstream fin;

	fin.open( filename.c_str() );
	if ( !fin ) {
	EvtGenReport( EVTGEN_ERROR, "EvtGen" )
	<< "Could not open file '" << filename.c_str() << "'" << endl;
	return -1;
	}

	char buf[MAXBUF];
	char buf2[MAXBUF];
	char c;

	int line = 0;
	int i;

	while ( fin.peek() != EOF ) {
	line++;

	i = 0;
	while ( ( c = fin.get() ) != '\n' && c != EOF && i < MAXBUF ) {
	buf[i] = c;
	i++;
	}
	if ( i == MAXBUF ) {
	EvtGenReport( EVTGEN_ERROR, "EvtGen" )
	<< "Error in EvtParser: line:" << line << " to long" << endl;
	} else {
	buf[i] = '\0';
	}

	//search for '#' which indicates comment for rest of line!
	i = 0;
	do {
	if ( buf[i] == '#' )
	buf[i] = 0;
	i++;
	} while ( buf[i - 1] != 0 );

	string tmp( buf, strlen( buf ) );

	//read each token
	istringstream ist( tmp );
	while ( ist >> buf2 ) {
	i = 0;
	int semicolon = 0;
	do {
	if ( buf2[i] == ';' ) {
	buf2[i] = 0;
	semicolon = 1;
	}
	} while ( buf2[i++] != 0 );
	if ( buf2[0] != 0 ) {
	addToken( line, buf2 );
	}
	if ( semicolon )
	addToken( line, ";" );
	}
	}

	fin.close();

	return 0;
	}

	void EvtParser::addToken( int line, const std::string& string )
	{
	//EvtGenReport(EVTGEN_INFO,"EvtGen") <<_ntoken<<" "<<line<<" "<<string<<endl;

	if ( _ntoken == _lengthoftokenlist ) {
	int new_length = 1000 + 4 * _lengthoftokenlist;

	int* newlinelist = new int[new_length];
	std::string* newtokenlist = new std::string[new_length];

	int i;

	for ( i = 0; i < _ntoken; i++ ) {
	newlinelist[i] = _linelist[i];
	newtokenlist[i] = _tokenlist[i];
	}

	delete[] _tokenlist;
	delete[] _linelist;

	_tokenlist = newtokenlist;
	_linelist = newlinelist;

	_lengthoftokenlist = new_length;
	}

	_tokenlist[_ntoken] = string;

	_linelist[_ntoken] = line;

	_ntoken++;

	//EvtGenReport(EVTGEN_INFO,"EvtGen") << "First:"<<_tokenlist[0]<<" last:"<<_tokenlist[_ntoken-1]<<endl;
	}

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