nodedata.cpp

#include "nodedata.h"

//----------------------------------------------------------------------------
// constructors/destructor  

NodeData::NodeData() { data = ""; }                         // default

NodeData::~NodeData() { }            // needed so strings are deleted properly

NodeData::NodeData(const NodeData& nd) { data = nd.data; }  // copy

NodeData::NodeData(const string& s) { data = s; }    // cast string to NodeData

//----------------------------------------------------------------------------
// operator= 

NodeData& NodeData::operator=(const NodeData& rhs) {
    if (this != &rhs) {
        data = rhs.data;
    }
    return *this;
}

//----------------------------------------------------------------------------
// operator==,!= 

bool NodeData::operator==(const NodeData& rhs) const {
    return data == rhs.data;
}

bool NodeData::operator!=(const NodeData& rhs) const {
    return data != rhs.data;
}

//----------------------------------------------------------------------------
// operator<,>,<=,>= 

bool NodeData::operator<(const NodeData& rhs) const {
    return data < rhs.data;
}

bool NodeData::operator>(const NodeData& rhs) const {
    return data > rhs.data;
}

bool NodeData::operator<=(const NodeData& rhs) const {
    return data <= rhs.data;
}

bool NodeData::operator>=(const NodeData& rhs) const {
    return data >= rhs.data;
}

//----------------------------------------------------------------------------
// setData 
// returns true if the data is set, false when bad data, i.e., is eof

bool NodeData::setData(istream& infile) {
    getline(infile, data);
    return !infile.eof();       // eof function is true when eof char is read
}

//----------------------------------------------------------------------------
// operator<< 

ostream& operator<<(ostream& output, const NodeData& nd) {
    output << nd.data;
    return output;
}