range.cpp

gibbs

#include "Range.h"

double convertArg(const char* arg)
{
    if (!strcmp(arg, "Infinity")) {
        return HUGE;
    } else if (!strcmp(arg, "-Infinity")) {
        return -HUGE;
    } else {
        return atof(arg);
    }
}

istream& operator>>(istream& in, Range& r)
{
    char c = ' ';
    do {
        c = (int)in.get();
    } while (isspace(c));

    // Handle missing
    if (c == 'M') {
        string s;
        in >> s;
        if (!s.compare("issing")) {
            r = Range();
        } else {
            in.clear(ios::badbit);
        }
        return in;
    } else if (c == '(' || c == '[') {
        string minVS, maxVS;

        // Get first arg
        while (in.get(c) && (c != ',')) { minVS += c; }

        // Skip spaces
        do { in.get(c); } while (in && isspace(c));

        // Get second arg
        maxVS = c;
        while (in.get(c) && (c != ')') && (c != ']')) { maxVS += c; }

        double minV = convertArg(minVS.c_str());
        double maxV = convertArg(maxVS.c_str());
        r = Range(minV, maxV);
    } else {
        int index;
        in.putback(c);
        in >> index;
        r = Range(index, index+0.01);
    }

    return in;
}

ostream& operator<<(ostream& out, const Range& r)
{
    if (r.missing) {
        out << "Missing";
    } else {
        out << "(" << r.minV << ", " << r.maxV << ")";
    }
    return out;
}