string <=> wstring 間の変換

gistfile1.hpp

#include <stdlib.h>
#include <string>

/**
 * = string <=> wstring 間の変換 =
 *
 * == HOWTO ==
 *
 * int main() {
 *     setlocale(LC_ALL, "Japanese_Japan.932");
 *     string s = "あいうえお";
 *     wstring ws = convString(s);
 *     string ss = convString(ws);
 * }
 */

namespace siwa32
{

	std::wstring convString(const std::string& input)
	{
		size_t i;
		wchar_t* buffer = new wchar_t[input.size() + 1];
		mbstowcs_s(&i, buffer, input.size() + 1, input.c_str(), _TRUNCATE);
		std::wstring result = buffer;
		delete[] buffer;
		return result;
	}

	std::string convString(const std::wstring& input)
	{
		size_t i;
		char* buffer = new char[input.size() * MB_CUR_MAX + 1];
		wcstombs_s(&i, buffer, input.size() * MB_CUR_MAX + 1, input.c_str(), _TRUNCATE);
		std::string result = buffer;
		delete[] buffer;
		return result;
	}

}// namespace siwa32