LauTextFileParser.cc

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/*
Copyright 2008 University of Warwick
 
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
 
    http://www.apache.org/licenses/LICENSE-2.0
 
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
 
/*
Laura++ package authors:
John Back
Paul Harrison
Thomas Latham
*/
 
// Class for defining strings that can also handle numbers
// Useful for writing lines of output text that has a combination of
// words and numbers
 
#include "LauTextFileParser.hh"
 
#include "LauString.hh"
 
#include <fstream>
 
using std::cerr;
using std::cout;
using std::endl;
 
LauTextFileParser::LauTextFileParser( const char* s ) :
    theFile_( s ),
    totalLines_( 0 ),
    lineNumber_( 0 )
{
}
 
LauTextFileParser::LauTextFileParser( const std::string& s ) :
    theFile_( s ),
    totalLines_( 0 ),
    lineNumber_( 0 )
{
}
 
LauTextFileParser::LauTextFileParser( const TString& s ) :
    theFile_( s.Data() ),
    totalLines_( 0 ),
    lineNumber_( 0 )
{
}
 
LauTextFileParser::~LauTextFileParser()
{
    LineMap::iterator mapIter;
    for ( mapIter = lineMap_.begin(); mapIter != lineMap_.end(); ++mapIter ) {
        std::vector<std::string> line = mapIter->second;
        line.clear();
    }
    lineMap_.clear();
}
 
void LauTextFileParser::processFile()
{
    // Read the input file and store each (non-comment) line in the internal map.
    // Store the strings/numbers from each line in a vector, using a whitespace
    // separator to get each value.
 
    std::ifstream getData( theFile_.c_str() );
 
    std::string whiteSpace( " " );
    UInt_t lineNo( 0 );
 
    cout << "Processing input file " << theFile_ << endl;
 
    // Loop while the input file is readable
    while ( getData.good() ) {
 
        if ( getData.peek() == '\n' ) {
 
            // Finish reading line
            char c;
            getData.get( c );
 
            // Stop while loop if we have reached the end of the file
            if ( getData.eof() ) {
                break;
            }
 
        } else if ( getData.peek() == '#' ) {
 
            // Skip comment line
            getData.ignore( 1000, '\n' );
            getData.putback( '\n' );
 
            // Stop while loop if we have reached the end of the file
            if ( getData.eof() ) {
                break;
            }
 
        } else {
 
            // Read data line
            char line[100];
            getData.getline( line, 100 );
 
            // Stop while loop if we have reached the end of the file
            if ( getData.eof() ) {
                break;
            }
 
            LauString lineString( line );
            // Split up the line according to white spaces
            std::vector<std::string> lineVect = lineString.split( whiteSpace );
 
            // Store this line in the internal map
            lineMap_[lineNo] = lineVect;
            lineNo++;
        }
    }
 
    totalLines_ = lineNo;
    cout << "Finished storing " << totalLines_ << " lines from " << theFile_ << endl;
}
 
std::vector<std::string> LauTextFileParser::getNextLine()
{
    // Get the next line of white-space separated strings/numbers
    ++lineNumber_;
 
    std::vector<std::string> theLine = this->getLine( lineNumber_ );
    return theLine;
}
 
std::vector<std::string> LauTextFileParser::getLine( UInt_t lineNo )
{
    // Retrieve the vector of white-space separated strings/numbers
    // for the given (non-commented) line number
    std::vector<std::string> line;
 
    LineMap::iterator mapIter = lineMap_.find( lineNo - 1 );
    if ( mapIter != lineMap_.end() ) {
        line = mapIter->second;
    }
 
    return line;
}