exiv2/samples/stringto-test.cpp

// ***************************************************************** -*- C++ -*-
// stringto-test.cpp
// Test conversions from string to long, float and Rational types.

#include <exiv2/exiv2.hpp>

#include <iostream>
#include <iomanip>

const char* testcases[] = {
    // bool
    "True",
    "False",
    "t",
    "f",
    // long
    "-1",
    "0",
    "1",
    // float
    "0.0",
    "0.1",
    "0.01",
    "0.001",
    "-1.49999",
    "-1.5",
    "1.49999",
    "1.5",
    // Rational
    "0/1",
    "1/1",
    "1/3",
    "-1/3",
    "4/3",
    "-4/3",
    "0/0",
    // nok
    "text"
};

int main()
{
    Exiv2::XmpParser::initialize();
    ::atexit(Exiv2::XmpParser::terminate);

    std::cout << std::setfill(' ');

    std::cout << std::setw(12) << std::left << "string";
    std::cout << std::setw(12) << std::left << "long";
    std::cout << std::setw(12) << std::left << "float";
    std::cout << std::setw(12) << std::left << "Rational";

    std::cout << std::endl;

    for (unsigned int i = 0; i < EXV_COUNTOF(testcases); ++i) try {
        std::string s(testcases[i]);
        std::cout << std::setw(12) << std::left << s;
        bool ok;

        long l = Exiv2::parseLong(s, ok);
        std::cout << std::setw(12) << std::left;
        if (ok) std::cout << l; else std::cout << "nok";

        float f = Exiv2::parseFloat(s, ok);
        std::cout << std::setw(12) << std::left;
        if (ok) std::cout << f; else std::cout << "nok";

        Exiv2::Rational r = Exiv2::parseRational(s, ok);
        if (ok) std::cout << r.first << "/" << r.second;
        else std::cout << "nok";

        std::cout << std::endl;
    }
    catch (Exiv2::AnyError& e) {
        std::cout << "Caught Exiv2 exception '" << e << "'\n";
        return -1;
    }

    return 0;
}