[vJASS] Filtering System and bitwise (help)

[Trigger.edge]

Someone explain to me how to achieve this function (based on The Filtering System):

Here the globals

struct Hit
        readonly static constant integer ENEMY=0x1
        readonly static constant integer ALLY=0x2
        readonly static constant integer STRUCTURE=0x4
        readonly static constant integer NON_STRUCTURE=0x8
        readonly static constant integer HERO=0x10
        readonly static constant integer NON_HERO=0x20
        readonly static constant integer IMMUNE=0x40
        readonly static constant integer NON_IMMUNE=0x80
        readonly static constant integer VISIBLE=0x100
        readonly static constant integer INVISIBLE=0x200
        readonly static constant integer GROUND=0x400
        readonly static constant integer FLYING=0x800
        readonly static constant integer MELEE=0x1000
        readonly static constant integer RANGED=0x2000
    endstruct

Here the function

private static method filterGroup takes nothing returns boolean
            local integer f=eventLoop.filter
            local integer id=GetUnitId(GetFilterUnit())
            local player p=GetOwningPlayer(eventLoop.dummy)
            local boolean array b
            local integer i=0
            //call BJDebugMsg(GetPlayerName(p))
            call BJDebugMsg(I2S(eventLoop.filter))
            if f>0x2000 then
                set f=f-0x2000
                if IsUnitType(GetUnitById(id),UNIT_TYPE_RANGED_ATTACKER) then
                    return false
                endif
            endif
            if f>0x1000 then
                set f=f-0x1000
                if IsUnitType(GetUnitById(id),UNIT_TYPE_MELEE_ATTACKER) then
                    return false
                endif
            endif
            if f>0x800 then
                set f=f-0x800
                if IsUnitType(GetUnitById(id),UNIT_TYPE_FLYING) then
                    return false
                endif
            endif
            if f>0x400 then
                set f=f-0x400
                if IsUnitType(GetUnitById(id),UNIT_TYPE_GROUND) then
                    return false
                endif
            endif
            if f>0x200 then
                set f=f-0x200
                if IsUnitInvisible(GetUnitById(id),p) then
                    return false
                endif
            endif
            if f>0x100 then
                set f=f-0x100
                if IsUnitVisible(GetUnitById(id),p) then
                    return false
                endif
            endif
            if f>0x80 then
                set f=f-0x80
                if not IsUnitType(GetUnitById(id),UNIT_TYPE_MAGIC_IMMUNE) then
                    return false
                endif
            endif
            if f>0x40 then
                set f=f-0x40
                if IsUnitType(GetUnitById(id),UNIT_TYPE_MAGIC_IMMUNE) then
                    return false
                endif
            endif
            if f>0x20 then
                set f=f-0x20
                if not IsUnitType(GetUnitById(id),UNIT_TYPE_HERO) then
                    return false
                endif
            endif
            if f>0x10 then
                set f=f-0x10
                if IsUnitType(GetUnitById(id),UNIT_TYPE_HERO) then
                    return false
                endif
            endif
            if f>0x8 then
                set f=f-0x8
                if not IsUnitType(GetUnitById(id),UNIT_TYPE_STRUCTURE) then
                    return false
                endif
            endif
            if f>0x4 then
                set f=f-0x4
                if IsUnitType(GetUnitById(id),UNIT_TYPE_STRUCTURE) then
                    return false
                endif
            endif
            if f>0x2 then
                set f=f-0x2
                if IsUnitAlly(GetUnitById(id),p) then
                    return false
                endif
            endif
            if f>0x1 then
                set f=f-0x1
                if IsUnitEnemy(GetUnitById(id),p) then
                    return false
                endif
            endif
            //call BJDebugMsg(GetPlayerName(p))
            //call BJDebugMsg(I2S(eventLoop.filter))
            return true
        endmethod

 

[Trigger.edge]

ok, I have partially resolved, mods: can close this thread, thanks.