int QueryMolecule::parseQueryAtom()

in core/indigo-core/molecule/src/query_molecule.cpp [2880:2915]

• 35 lines of code
• 74 McCabe index (conditional complexity)

int QueryMolecule::parseQueryAtom(QueryMolecule::Atom& qa, Array<int>& list)
{
    QueryMolecule::Atom* qc = stripKnownAttrs(qa);
    if (qa.type == QueryMolecule::OP_NONE)
        return QUERY_ATOM_AH;
    if (qc != NULL && isNotAtom(*qc, ELEM_H))
        return QUERY_ATOM_A;
    bool notList = false;
    if (collectAtomList(qa, list, notList) || (qa.type == QueryMolecule::OP_NOT && collectAtomList(*qa.child(0), list, notList) && !notList))
    { // !notList is to check there's no double negation
        if (list.size() == 0)
            return -1;
        notList = notList || qa.type == QueryMolecule::OP_NOT;
        if (!notList && list.size() == 5 && list[0] == ELEM_F && list[1] == ELEM_Cl && list[2] == ELEM_Br && list[3] == ELEM_I && list[4] == ELEM_At)
            return QUERY_ATOM_X;
        if (!notList && list.size() == 6 && list[0] == ELEM_F && list[1] == ELEM_Cl && list[2] == ELEM_Br && list[3] == ELEM_I && list[4] == ELEM_At &&
            list[5] == ELEM_H)
            return QUERY_ATOM_XH;
        if (notList && list.size() == 2 && ((list[0] == ELEM_C && list[1] == ELEM_H) || (list[0] == ELEM_H && list[1] == ELEM_C)))
            return QUERY_ATOM_Q;
        if (notList && list.size() == 1 && (list[0] == ELEM_C))
            return QUERY_ATOM_QH;
        if (notList && list.size() == 17 && list[0] == ELEM_C && list[1] == ELEM_N && list[2] == ELEM_O && list[3] == ELEM_F && list[4] == ELEM_P &&
            list[5] == ELEM_S && list[6] == ELEM_Cl && list[7] == ELEM_Se && list[8] == ELEM_Br && list[9] == ELEM_I && list[10] == ELEM_At &&
            list[11] == ELEM_He && list[12] == ELEM_Ne && list[13] == ELEM_Ar && list[14] == ELEM_Kr && list[15] == ELEM_Xe && list[16] == ELEM_Rn)
            return QUERY_ATOM_MH;
        if (notList && list.size() == 18 && list[0] == ELEM_C && list[1] == ELEM_N && list[2] == ELEM_O && list[3] == ELEM_F && list[4] == ELEM_P &&
            list[5] == ELEM_S && list[6] == ELEM_Cl && list[7] == ELEM_Se && list[8] == ELEM_Br && list[9] == ELEM_I && list[10] == ELEM_At &&
            list[11] == ELEM_He && list[12] == ELEM_Ne && list[13] == ELEM_Ar && list[14] == ELEM_Kr && list[15] == ELEM_Xe && list[16] == ELEM_Rn &&
            list[17] == ELEM_H)
            return QUERY_ATOM_M;

        return notList ? QUERY_ATOM_NOTLIST : QUERY_ATOM_LIST;
    }
    return -1;
}