Surrogate Pair Test (For Windows VC9)

Surrogate Pair Test (For Windows)

#include "stdafx.h"
#include "Windows.h"
#include "winnls.h"

#include <string>
#include <cstdio>

using namespace std;


void PrintBinary(const void *str, size_t size){
  for(size_t i = 0; i < size; i++){
    printf("%02x", *(reinterpret_cast<const unsigned char *>(str) + i));
  }
  printf("\n");
}

void PrintSizeWchar(const char *utf8){
  wchar_t *wcstr = new wchar_t[3];
  memset(wcstr, 0, sizeof(wchar_t) * 3);

  int res = 0;
  res = ::MultiByteToWideChar(CP_UTF8, 0, utf8, strlen(utf8), wcstr, sizeof(wchar_t) * 3);
  if(res == 0){
	  printf("failed\n");
	  exit(-1);
  }

  wstring wstr(wcstr);

  printf("%lu\n", wstr.size());
  //PrintBinary(wstr.c_str(), wstr.size() * sizeof(wchar_t));
  delete[] wcstr;
}

int _tmain(int argc, _TCHAR *argv[])
{

  // http://unicode.org/cgi-bin/GetUnihanData.pl?codepoint=3042
  // This character don't use Surrogate Pair.
  PrintSizeWchar("\xE3\x81\x82");

  // http://unicode.org/cgi-bin/GetUnihanData.pl?codepoint=2000B
  // This character use Surrogate Pair.
  PrintSizeWchar("\xF0\xA0\x80\x8B");
  return 0;
}

I compiled this source with the environment, "Visual Studio 2008(VC9), Windows 7 Ultimate"
It outputs the following, wrongly.
---- OUTPUT -----

1
2

---