C++ STL(二)string与wstring互转

 1 void StringToWstring_WindowApi(const string &str, wstring &wstr)
 2 {
 3     int nLen = MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), NULL, 0);
 4     wchar_t* buffer = new wchar_t[nLen + 1];
 5 
 6     MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), buffer, nLen);
 7 
 8     buffer[nLen] = ‘\0‘;                    //字符串断尾
 9     wstr = buffer;                                                 //赋值
10     delete[] buffer;                       //删除缓冲区
11 }
12 void WstringToString_WindowsApi(const wstring &wstr, string &str)
13 {
14     int nLen = WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), NULL, 0, NULL, NULL);
15     char* buffer = new char[nLen + 1];
16     WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), buffer, nLen, NULL, NULL);
17     buffer[nLen] = ‘\0‘;               //字符串断尾
18     str = buffer;                                             //赋值
19     delete[] buffer;                  //删除缓冲区
20 }

 1 void StringToWstring_ATL(const string &str, wstring &wstr)
 2 {
 3     USES_CONVERSION;
 4     wstr = A2W(str.c_str());
 5 }
 6 void WstringToString_ATL(const wstring &wstr, string &str)
 7 {
 8     USES_CONVERSION;
 9     str = W2A(wstr.c_str());
10 }

 1 void StringToWstring_CRT(const string &str, wstring &wstr)
 2 {
 3     string curLocale = setlocale(LC_ALL,NULL); //curLocale = "C"
 4     setlocale(LC_ALL, "chs");
 5     int nLen = str.size() + 1;
 6     mbstowcs((wchar_t*)wstr.c_str(), str.c_str(), nLen);
 7     setlocale(LC_ALL, curLocale.c_str());
 8 
 9     return ;
10 }
11 void WstringToString_CRT(const wstring &wstr, string &str)
12 {
13     string curLocale = setlocale(LC_ALL,NULL); //curLocale = "C"
14     setlocale(LC_ALL, "chs");
15     int nLen = wstr.size() + 1;
16     wcstombs((char*)str.c_str(), wstr.c_str(), nLen);
17     setlocale(LC_ALL, curLocale.c_str());
18 
19     return ;
20 }