编码转换

// 多字节编码转为UTF8编码 
bool MBToUTF8(vector<char>& pu8, const char* pmb, int32 mLen) 
{ 
 // convert an MBCS string to widechar  
 int32 nLen = MultiByteToWideChar(CP_ACP, 0, pmb, mLen, NULL, 0); 
  
 WCHAR* lpszW = NULL; 
 try 
 { 
    lpszW = new WCHAR[nLen]; 
 } 
 catch(bad_alloc &memExp) 
 { 
    return false; 
 } 
 
 int32 nRtn = MultiByteToWideChar(CP_ACP, 0, pmb, mLen, lpszW, nLen); 
  
 if(nRtn != nLen) 
 { 
    delete[] lpszW; 
    return false; 
 } 
 // convert an widechar string to utf8 
 int32 utf8Len = WideCharToMultiByte(CP_UTF8, 0, lpszW, nLen, NULL, 0, NULL, NULL); 
 if (utf8Len <= 0) 
 { 
     return false; 
 } 
 pu8.resize(utf8Len); 
 nRtn = WideCharToMultiByte(CP_UTF8, 0, lpszW, nLen, &*pu8.begin(), utf8Len, NULL, NULL); 
 delete[] lpszW; 
 
 if (nRtn != utf8Len) 
 { 
     pu8.clear(); 
     return false; 
 } 
 return true; 
} 
 
// UTF8编码转为多字节编码 
bool UTF8ToMB(vector<char>& pmb, const char* pu8, int32 utf8Len) 
{ 
    // convert an UTF8 string to widechar  
    int32 nLen = MultiByteToWideChar(CP_UTF8, 0, pu8, utf8Len, NULL, 0); 
 
    WCHAR* lpszW = NULL; 
    try 
    { 
        lpszW = new WCHAR[nLen]; 
    } 
    catch(bad_alloc &memExp) 
    { 
        return false; 
    } 
 
    int32 nRtn = MultiByteToWideChar(CP_UTF8, 0, pu8, utf8Len, lpszW, nLen); 
 
    if(nRtn != nLen) 
    { 
        delete[] lpszW; 
        return false; 
    } 
 
    // convert an widechar string to Multibyte  
    int32 MBLen = WideCharToMultiByte(CP_ACP, 0, lpszW, nLen, NULL, 0, NULL, NULL); 
    if (MBLen <=0) 
    { 
        return false; 
    } 
    pmb.resize(MBLen); 
    nRtn = WideCharToMultiByte(CP_ACP, 0, lpszW, nLen, &*pmb.begin(), MBLen, NULL, NULL); 
    delete[] lpszW; 
 
    if(nRtn != MBLen) 
    { 
        pmb.clear(); 
        return false; 
    } 
    return true; 
} 
 
// 多字节编码转为Unicode编码 
bool MBToUnicode(vector<wchar_t>& pun, const char* pmb, int32 mLen) 
{ 
    // convert an MBCS string to widechar  
    int32 uLen = MultiByteToWideChar(CP_ACP, 0, pmb, mLen, NULL, 0); 
 
    if (uLen<=0) 
    { 
        return false; 
    } 
    pun.resize(uLen); 
 
    int32 nRtn = MultiByteToWideChar(CP_ACP, 0, pmb, mLen, &*pun.begin(), uLen); 
 
    if (nRtn != uLen) 
    { 
        pun.clear(); 
        return false; 
    } 
    return true; 
} 
 
//Unicode编码转为多字节编码 
bool UnicodeToMB(vector<char>& pmb, const wchar_t* pun, int32 uLen) 
{ 
    // convert an widechar string to Multibyte  
    int32 MBLen = WideCharToMultiByte(CP_ACP, 0, pun, uLen, NULL, 0, NULL, NULL); 
    if (MBLen <=0) 
    { 
        return false; 
    } 
    pmb.resize(MBLen); 
    int nRtn = WideCharToMultiByte(CP_ACP, 0, pun, uLen, &*pmb.begin(), MBLen, NULL, NULL); 
 
    if(nRtn != MBLen) 
    { 
        pmb.clear(); 
        return false; 
    } 
    return true; 
} 
 
// UTF8编码转为Unicode 
bool UTF8ToUnicode(vector<wchar_t>& pun, const char* pu8, int32 utf8Len) 
{ 
    // convert an UTF8 string to widechar  
    int32 nLen = MultiByteToWideChar(CP_UTF8, 0, pu8, utf8Len, NULL, 0); 
    if (nLen <=0) 
    { 
        return false; 
    } 
    pun.resize(nLen); 
    int32 nRtn = MultiByteToWideChar(CP_UTF8, 0, pu8, utf8Len, &*pun.begin(), nLen); 
 
    if(nRtn != nLen) 
    { 
        pun.clear(); 
        return false; 
    } 
 
    return true; 
} 
 
// Unicode编码转为UTF8 
bool UnicodeToUTF8(vector<char>& pu8, const wchar_t* pun, int32 uLen) 
{ 
    // convert an widechar string to utf8 
    int32 utf8Len = WideCharToMultiByte(CP_UTF8, 0, pun, uLen, NULL, 0, NULL, NULL); 
    if (utf8Len<=0) 
    { 
        return false; 
    } 
    pu8.resize(utf8Len); 
    int32 nRtn = WideCharToMultiByte(CP_UTF8, 0, pun, uLen, &*pu8.begin(), utf8Len, NULL, NULL); 
 
    if (nRtn != utf8Len) 
    { 
        pu8.clear(); 
        return false; 
    } 
    return true; 
}