; structure definition helper

macro struct name
{
    name@struct fix name
    normal@struct = 0
    struc name {
}

macro struct_helper name
{
    local ..name
    virtual at 0
    ..name name
    end virtual

    normal.#name = normal@struct

    virtual at -normal@struct
    name name
    sizeof.#name = $ - name
    name equ sizeof.#name
    end virtual
}

ends fix } struct_helper name@struct

macro normal
{
    normal@struct = $
}    

struct MemoryBlock
    .sig        dd ?
    .size       dd ?
    .next       dd ?
normal
    .data       rb 0
ends

display '-', -MemoryBlock.size + '0'