C++编码转换类

class CChineseCode{  public:  static void UTF_8ToUnicode(wchar_t* pOut,char *pText); // 把UTF-8转换成Unicode  static void UnicodeToUTF_8(char* pOut,wchar_t* pText); //Unicode 转换成UTF-8  static void UnicodeToGB2312(char* pOut,wchar_t uData); // 把Unicode 转换成 GB2312    static void Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer);// GB2312 转换成　Unicode  static void GB2312ToUTF_8(string& pOut,char *pText, int pLen);//GB2312 转为 UTF-8  static void UTF_8ToGB2312(string &pOut, char *pText, int pLen);//UTF-8 转为 GB2312};类实现void CChineseCode::UTF_8ToUnicode(wchar_t* pOut,char *pText){  char* uchar = (char *)pOut;  uchar[1] = ((pText[0] & 0x0F) << 4) + ((pText[1] >> 2) & 0x0F);  uchar[0] = ((pText[1] & 0x03) << 6) + (pText[2] & 0x3F);  return;}void CChineseCode::UnicodeToUTF_8(char* pOut,wchar_t* pText){  // 注意 WCHAR高低字的顺序,低字节在前，高字节在后  char* pchar = (char *)pText;  pOut[0] = (0xE0 | ((pchar[1] & 0xF0) >> 4));  pOut[1] = (0x80 | ((pchar[1] & 0x0F) << 2)) + ((pchar[0] & 0xC0) >> 6);  pOut[2] = (0x80 | (pchar[0] & 0x3F));  return;}void CChineseCode::UnicodeToGB2312(char* pOut,wchar_t uData){  WideCharToMultiByte(CP_ACP,NULL,&uData,1,pOut,sizeof(wchar_t),NULL,NULL);  return;}   void CChineseCode::Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer){  ::MultiByteToWideChar(CP_ACP,MB_PRECOMPOSED,gbBuffer,2,pOut,1);  return ;}void CChineseCode::GB2312ToUTF_8(string& pOut,char *pText, int pLen){  char buf[4];  int nLength = pLen* 3;  char* rst = new char[nLength];      memset(buf,0,4);  memset(rst,0,nLength);      int i = 0;  int j = 0;     while(i < pLen)  {  //如果是英文直接复制就能  if( *(pText + i) >= 0)  {  rst[j++] = pText[i++];  }  else  {  wchar_t pbuffer;  Gb2312ToUnicode(&pbuffer,pText+i);      UnicodeToUTF_8(buf,&pbuffer);      unsigned short int tmp = 0;  tmp = rst[j] = buf[0];  tmp = rst[j+1] = buf[1];  tmp = rst[j+2] = buf[2];         j += 3;  i += 2;  }  }  rst[j] = ’’;  //返回结果  pOut = rst;     delete []rst;         return;}void CChineseCode::UTF_8ToGB2312(string &pOut, char *pText, int pLen){  char * newBuf = new char[pLen];  char Ctemp[4];  memset(Ctemp,0,4);  int i =0;  int j = 0;      while(i < pLen)  {  if(pText > 0)  {  newBuf[j++] = pText[i++];     }  else     {  WCHAR Wtemp;  UTF_8ToUnicode(&Wtemp,pText + i);      UnicodeToGB2312(Ctemp,Wtemp);      newBuf[j] = Ctemp[0];  newBuf[j + 1] = Ctemp[1];  i += 3;     j += 2;     }  }  newBuf[j] = ’’;      pOut = newBuf;  delete []newBuf;      return;  }