VC中实现GB2312、BIG5、Unicode编码转换的方法

//GB2312 编码文件转换成 Unicode：if((file_handle = fopen(filenam,"rb")) != NULL){    //从GB2312源文件以二进制的方式读取buffer    numread = fread(str_buf_pool,sizeof(char),POOL_BUFF_SIZE,file_handle);    fclose(file_handle);   //GB2312文件buffer转换成UNICODE   nLen  =MultiByteToWideChar(CP_ACP,0,str_buf_pool,-1,NULL,0);    MultiByteToWideChar(CP_ACP,0,str_buf_pool,-1,(LPWSTR)str_unicode_buf_pool,nLen);   //组装UNICODE Little Endian编码文件文件头标示符"0xFF 0xFE"    //备注：UNICODE Big Endian编码文件文件头标示符"0xFF 0xFE"    //Little Endian与Big Endian编码差异此处不详述   unicode_little_file_header[0]=0xFF;   unicode_little_file_header[1]=0xFE;   //存储目标文件   if((file_handle=fopen(filenewname,"wb+")) != NULL)   {   fwrite(unicode_little_file_header,sizeof(char),2,file_handle);   numwrite = fwrite(str_unicode_buf_pool,sizeof(LPWSTR),nLen,file_handle);   fclose(file_handle);   }}

//GB2312 转换成 Unicode：wchar_t* GB2312ToUnicode(const char* szGBString){    UINT nCodePage = 936; //GB2312    int nLength=MultiByteToWideChar(nCodePage,0,szGBString,-1,NULL,0);    wchar_t* pBuffer = new wchar_t[nLength+1];    MultiByteToWideChar(nCodePage,0,szGBString,-1,pBuffer,nLength);    pBuffer[nLength]=0;    return pBuffer;}//BIG5 转换成 Unicode：wchar_t* BIG5ToUnicode(const char* szBIG5String){    UINT nCodePage = 950; //BIG5    int nLength=MultiByteToWideChar(nCodePage,0,szBIG5String,-1,NULL,0);    wchar_t* pBuffer = new wchar_t[nLength+1];    MultiByteToWideChar(nCodePage,0,szBIG5String,-1,pBuffer,nLength);    pBuffer[nLength]=0;    return pBuffer;}//Unicode 转换成 GB2312：char* UnicodeToGB2312(const wchar_t* szUnicodeString){    UINT nCodePage = 936; //GB2312    int nLength=WideCharToMultiByte(nCodePage,0,szUnicodeString,-1,NULL,0,NULL,NULL);    char* pBuffer=new char[nLength+1];    WideCharToMultiByte(nCodePage,0,szUnicodeString,-1,pBuffer,nLength,NULL,NULL);    pBuffer[nLength]=0;    return pBuffer;}//Unicode 转换成 BIG5：char* UnicodeToBIG5(const wchar_t* szUnicodeString){    UINT nCodePage = 950; //BIG5    int nLength=WideCharToMultiByte(nCodePage,0,szUnicodeString,-1,NULL,0,NULL,NULL);    char* pBuffer=new char[nLength+1];    WideCharToMultiByte(nCodePage,0,szUnicodeString,-1,pBuffer,nLength,NULL,NULL);    pBuffer[nLength]=0;    return pBuffer;}//繁体中文BIG5 转换成 简体中文 GB2312char* BIG5ToGB2312(const char* szBIG5String){    LCID lcid = MAKELCID(MAKELANGID(LANG_CHINESE,SUBLANG_CHINESE_SIMPLIFIED),SORT_CHINESE_PRC);    wchar_t* szUnicodeBuff = BIG5ToUnicode(szBIG5String);    char* szGB2312Buff = UnicodeToGB2312(szUnicodeBuff);    int nLength = LCMapString(lcid,LCMAP_SIMPLIFIED_CHINESE, szGB2312Buff,-1,NULL,0);    char* pBuffer = new char[nLength + 1];    LCMapString(0x0804,LCMAP_SIMPLIFIED_CHINESE,szGB2312Buff,-1,pBuffer,nLength);    pBuffer[nLength] = 0;        delete[] szUnicodeBuff;    delete[] szGB2312Buff;    return pBuffer;}//简体中文 GB2312 转换成 繁体中文BIG5char* GB2312ToBIG5(const char* szGBString){    LCID lcid = MAKELCID(MAKELANGID(LANG_CHINESE,SUBLANG_CHINESE_SIMPLIFIED),SORT_CHINESE_PRC);    int nLength = LCMapString(lcid,LCMAP_TRADITIONAL_CHINESE,szGBString,-1,NULL,0);    char* pBuffer=new char[nLength+1];    LCMapString(lcid,LCMAP_TRADITIONAL_CHINESE,szGBString,-1,pBuffer,nLength);    pBuffer[nLength]=0;    wchar_t* pUnicodeBuff = GB2312ToUnicode(pBuffer);    char* pBIG5Buff = UnicodeToBIG5(pUnicodeBuff);    delete[] pBuffer;    delete[] pUnicodeBuff;    return pBIG5Buff;}