linux c++下gb18030、utf8之间的转换

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int nSrcLen;int nDestLen;char szConvertBuf[4096] ={0};char szMess[256] ={0};nSrcLen = strlen(str);nDestLen = 256;if(-1 == ConverCode("GB18030", "UTF-8", str,(size_t)nSrcLen, szConvertBuf, (size_t)nDestLen, szMess)){    retcode=-1;    sprintf(m_errMsg, "字符转化失败,[%s]",szMess);    m_logger.WriteLog(Err,__LINE__,m_reqNo,RETCODE_SYSTEM,m_errMsg);    return string(szMess);}sprintf(m_errMsg, "字符转化成功,[%s]",szConvertBuf);m_logger.WriteLog(Detail,__LINE__,m_reqNo,RETCODE_SYSTEM,m_errMsg);retcode=0;return string(szConvertBuf);}string CHostFunc::UTF8ToGB(const char* str,int &retcode){int nSrcLen;int nDestLen;char szConvertBuf[4096] ={0};char szMess[256] ={0};nSrcLen = strlen(str);nDestLen = 256;if(-1 == ConverCode("UTF-8", "GB18030", str,(size_t)nSrcLen, szConvertBuf, (size_t)nDestLen, szMess)){    retcode =-1;     sprintf(m_errMsg, "字符转化失败,[%s]",szMess);    m_logger.WriteLog(Err,__LINE__,m_reqNo,RETCODE_SYSTEM,m_errMsg);    return string(szMess);}sprintf(m_errMsg, "字符转化成功,[%s]",szConvertBuf);m_logger.WriteLog(Detail,__LINE__,m_reqNo,RETCODE_SYSTEM,m_errMsg);    retcode=0;return string(szConvertBuf);

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