Program Listing for File StringTools.h

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#ifndef __StringTools_h__
#define __StringTools_h__

#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include <sstream>

namespace Utilities
{
    class StringTools
    {
    public:

        static void tokenize(const std::string& str, std::vector<std::string>& tokens, const std::string& delimiters = " ")
        {
            std::string::size_type lastPos = str.find_first_not_of(delimiters, 0);
            std::string::size_type pos = str.find_first_of(delimiters, lastPos);

            while (std::string::npos != pos || std::string::npos != lastPos)
            {
                tokens.push_back(str.substr(lastPos, pos - lastPos));
                lastPos = str.find_first_not_of(delimiters, pos);
                pos = str.find_first_of(delimiters, lastPos);
            }
        }

        template <typename T>
        static std::string to_string_with_precision(const T val, const int n = 6)
        {
            std::ostringstream ostr;
            ostr.precision(n);
            ostr << std::fixed << val;
            return ostr.str();
        }

        template<typename T>
        static std::string real2String(const T r)
        {
            std::string str = to_string_with_precision(r,20);
            str.erase(str.find_last_not_of('0') + 1, std::string::npos);
            str.erase(str.find_last_not_of('.') + 1, std::string::npos);
            return str;
        }

        static std::string to_upper(const std::string& str)
        {
            std::string res = str;
            std::transform(res.begin(), res.end(), res.begin(), ::toupper);
            return res;
        }
    };
}

#endif