special abilities - Eg naga's spit poison, or the Invocations you get

   special abilities - e.g. nagas' spit poison, or the Invocations you get

void set_god_ability_helper( int abil, char letter )
/**************************************************/

static void set_god_ability_helper( int abil, char letter )

}
// return GOD_NO_GOD if it isn't a god ability, otherwise return
// the index of the god.
static int is_god_ability(int abil)
{
    if ( abil == ABIL_NON_ABILITY )
        return GOD_NO_GOD;
    for ( int i = 0; i < MAX_NUM_GODS; ++i )
        for ( int j = 0; j < MAX_GOD_ABILITIES; ++j )
            if ( god_abilities[i][j] == abil )
                return i;
    return GOD_NO_GOD;

/********************************/

    int num_abil = 0;
    int abil_start = ABIL_NON_ABILITY;
    switch (you.religion)
    {
    case GOD_ZIN:
        abil_start = ABIL_ZIN_REPEL_UNDEAD;
        num_abil = 5; 
        break;
    case GOD_SHINING_ONE:
        abil_start = ABIL_TSO_REPEL_UNDEAD;
        num_abil = 5; 
        break;
    case GOD_KIKUBAAQUDGHA:
        abil_start = ABIL_KIKU_RECALL_UNDEAD_SLAVES;
        num_abil = 3; 
        break;

    case GOD_YREDELEMNUL:
        abil_start = ABIL_YRED_ANIMATE_CORPSE;
        num_abil = 5; 
        break;
    case GOD_OKAWARU:
        abil_start = ABIL_OKAWARU_MIGHT;
        num_abil = 3; 
        break;
    case GOD_MAKHLEB:
        abil_start = ABIL_MAKHLEB_MINOR_DESTRUCTION;
        num_abil = 4; 
        break;
    case GOD_SIF_MUNA:
        abil_start = ABIL_SIF_MUNA_CHANNEL_ENERGY;
        num_abil = 2; 
        break;
    case GOD_TROG:
        abil_start = ABIL_TROG_BERSERK;
        num_abil = 3; 
        break;
    case GOD_ELYVILON:
        abil_start = ABIL_ELYVILON_LESSER_HEALING;
        num_abil = 5; 
        break;
    case GOD_VEHUMET:
    case GOD_NEMELEX_XOBEH:
    case GOD_XOM:
    default:
        break;
    }
    // clear out other god invocations:

    // clear out other god invocations

        const int abil = you.ability_letter_table[i];
        if ((abil >= ABIL_ZIN_REPEL_UNDEAD      // is a god ability
                    && abil <= ABIL_ELYVILON_GREATER_HEALING)
            && (num_abil == 0           // current god does have abilities
                || abil < abil_start    // not one of current god's abilities
                || abil >= abil_start + num_abil))
        {

        const int god = is_god_ability(you.ability_letter_table[i]);
        if ( god != GOD_NO_GOD && god != you.religion )

        }

    // finally, add in current god's invocaions in traditional slots:
    if (num_abil)

    // finally, add in current god's invocations in traditional slots:
    int num = 0;
    for ( i = 0; i < MAX_GOD_ABILITIES; ++i )

        for (i = 0; i < num_abil; i++)

        if ( god_abilities[(int)you.religion][i] != ABIL_NON_ABILITY )

            set_god_ability_helper( abil_start + i, 
                    (Options.lowercase_invocations ? 'a' : 'A') + i );

            set_god_ability_helper(god_abilities[(int)you.religion][i],
                                   (Options.lowercase_invocations ? 'a' : 'A') + num);
            ++num;

    // no requested slot, find new one and make it prefered.

    // no requested slot, find new one and make it preferred.