KCF_MECH2INDEX
index = KCF_MECH2INDEX(mech_type_1);
index = KCF_MECH2INDEX(mech_type);
[KCF_MECH2INDEX(kcf_mech_type)] = mech_indx;
index = KCF_MECH2INDEX(mech_type);
i = KCF_MECH2INDEX(mt);
[KCF_MECH2INDEX(mech_type)])