struct AUTHID

{

  LEX_CSTRING user, host;

  void init() { memset(this, 0, sizeof(*this)); }

  void copy(MEM_ROOT *root, const LEX_CSTRING *usr, const LEX_CSTRING *host);

  bool is_role() const { return user.str[0] && !host.str[0]; }

  void set_lex_string(LEX_CSTRING *l, char *buf)

  {

    if (is_role())

      *l= user;

    else

    {

      l->str= buf;

      l->length= strxmov(buf, user.str, "@", host.str, NullS) - buf;

    }

  }

};

struct LEX_USER: public AUTHID

{

  LEX_CSTRING plugin, auth;

  LEX_CSTRING pwtext, pwhash;

  void reset_auth()

  {

    pwtext.length= pwhash.length= plugin.length= auth.length= 0;

    pwtext.str= pwhash.str= 0;

    plugin.str= auth.str= "";

  }

};