06-00-split.cpp

#include <iostream>
#include <vector>
#include <stdexcept>
#include <cctype>

// isspace is overloaded so we use wrapper function as argument for find_if
bool space(char c)
{
    return isspace(c);
}
bool not_space(char c)
{
    return !isspace(c);
}

std::vector<std::string> split(const std::string& str)
{    
    using namespace std;
    typedef string::const_iterator iter;
    vector<string> ret;

    iter i = str.begin();
    while(i != str.end())
    {
        // ignore leading spaces
        i = find_if(i, str.end(), not_space);
        // find end of next word
        iter j = find_if(i, str.end(), space);
        if(i != str.end())
            ret.push_back(string(i, j));
        i = j;
    }
    return ret;
}

/* SETUP TESTS */

#include <cppunit/extensions/HelperMacros.h>
class myTest : public CppUnit::TestFixture {
public:
    void setUp() {}
    void tearDown() {}

    void checkResult();
    CPPUNIT_TEST_SUITE( myTest );
    CPPUNIT_TEST( checkResult );
    CPPUNIT_TEST_SUITE_END();
};
CPPUNIT_TEST_SUITE_REGISTRATION ( myTest );
    
void myTest::checkResult() 
{
    typedef std::vector<std::string> vec_str;
    
    vec_str vec = split(std::string(""));
    CPPUNIT_ASSERT_EQUAL((vec_str::size_type)0, vec.size());
    vec = split(std::string("test"));
    CPPUNIT_ASSERT_EQUAL((vec_str::size_type)1, vec.size());

    const std::string input(" \tone two\n    tree\tfour five\t\t");
    vec_str etalon;
    etalon.push_back("one");
    etalon.push_back("two");
    etalon.push_back("tree");
    etalon.push_back("four");
    etalon.push_back("five");

    vec = split(input);

    CPPUNIT_ASSERT_EQUAL((vec_str::size_type)5, vec.size());
    std::cout << std::endl << input << std::endl;
    for(vec_str::size_type i = 0; i != vec.size(); ++i) {
        std::cout << i << " " << vec[i] << std::endl;
        CPPUNIT_ASSERT_EQUAL(etalon[i], vec[i]);
    }
}

#include "cppunit_run.inc"