多字节与UTF-8、Unicode之间的转换

// 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Unicodebool 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UTF8bool UnicodeToUTF8(vector<char>& pu8, const wchar_t* pun, int32 uLen){// convert an widechar string to utf8int32 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;}