c++多字节与宽字节字符串转换(windows平台)_ATHER Shu(A.S)的Blog

/**
* Author: ATHER Shu 2009年3月20日
* StringUtil类:用于ANSI、UTF-16、UTF-8之间的字串转换
* 功能:
* 1.UTF-16转ANSI ws2s
* 2.ANSI转UTF-16 s2ws
* 3.UTF-16转UTF-8 ws2utf8
* 4.UTF-8转UTF-16 utf82ws
* http://www.asarea.me
* ATHER Shu(AS)
*/
#include <string>
#include <Windows.h>
using namespace std;

class StringUtil
{
public:
  static string ws2s(const wstring& ws)
  {
    const wchar_t* _Source = ws.c_str();
    size_t _Dsize = WideCharToMultiByte(CP_ACP, 0, _Source, -1, NULL, 0, NULL, NULL);
    char *_Dest = new char[_Dsize];
    WideCharToMultiByte(CP_ACP, 0, _Source, -1, _Dest, _Dsize, NULL, NULL);
    string result = _Dest;
    delete []_Dest;
    return result;
  }
  static wstring s2ws(const string& s)
  {
    const char* _Source = s.c_str();
    size_t _Dsize = MultiByteToWideChar(CP_ACP, 0, _Source, -1, NULL, 0);
    wchar_t *_Dest = new wchar_t[_Dsize];
    MultiByteToWideChar(CP_ACP, 0, _Source, -1, _Dest, _Dsize);
    wstring result = _Dest;
    delete []_Dest;
    return result;
  }
  static string ws2utf8(const wstring& ws)
  {
    const wchar_t* _Source = ws.c_str();
    size_t _Dsize = WideCharToMultiByte(CP_UTF8, 0, _Source, -1, NULL, 0, NULL, NULL);
    char *_Dest = new char[_Dsize];
    WideCharToMultiByte(CP_UTF8, 0, _Source, -1, _Dest, _Dsize, NULL, NULL);
    string result = _Dest;
    delete []_Dest;
    return result;
  }
  static wstring utf82ws(const string& s)
  {
    const char* _Source = s.c_str();
    size_t _Dsize = MultiByteToWideChar(CP_UTF8, 0, _Source, -1, NULL, 0);
    wchar_t *_Dest = new wchar_t[_Dsize];
    MultiByteToWideChar(CP_UTF8, 0, _Source, -1, _Dest, _Dsize);
    wstring result = _Dest;
    delete []_Dest;
    return result;
  }
};