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Index > Macroinstructions > Problem using dup to define an array of structures
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chris



Joined: 05 Jan 2006
Posts: 62
Location: China->US->China->?
chris 30 Jan 2006, 12:14
Hi, All
Consider the following code snippet:
Code:
include 'win32ax.inc'

struct ATOM
  proton   dd ?
  electron dd ?
  neutron  dd ?
ends

atom ATOM ; correct
molecular ATOM 128 dup (?) ; incorrect
string db 128 dup (?) ; correct

I was trying to use dup operator to define an array of structures namely molecular, but it seems that fasm does not allow to do this and dup can only be used with 'native' data types. Is it possible to extend dup in such a way that user defined data types can be duplicated in this way? thanks in advance.
Post 30 Jan 2006, 12:14
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4624
Location: Argentina
LocoDelAssembly 30 Jan 2006, 14:32
You can do:
Code:
molecular ATOM
rb 127 * sizeof.ATOM


But maybe there is a more elegant solution

[edit]This apparently works:
Code:
include 'win32ax.inc'

macro struct name
{
  struc name#.dup count\{
    . name
    rb sizeof.#name * (count - 1)
  \}
 struct name
}


struct ATOM
  proton   dd ? 
  electron dd ? 
  neutron  dd ? 
ends 

atom ATOM ; correct 
molecular ATOM.dup 128 ; correct now
string db 128 dup (?) ; correct
Post 30 Jan 2006, 14:32
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chris



Joined: 05 Jan 2006
Posts: 62
Location: China->US->China->?
chris 05 Feb 2006, 08:46
I defined the following struc macro which works outside the struct macro. I am still trying to integrate it into struct macro but it seems rather complicated. Anyone has a better idea?

Code:
struc ATOM2 Param
{
        if 1
        match num dup (?),Param
        \{
                rept num count
                \\{
                     struc MakeItem
                     \\\{
                           \.proton   dd ?
                           \.electron dd ?
                           \.neutron  dd ?
                     \\\}
                     .@\\#count MakeItem
                \\}
        else
        \}

        .proton   dd ?
        .electron dd ?
        .neutron  dd ?
        end if
}

atom ATOM2
molecular ATOM2 5 dup (?)

include 'macro\struct.inc'

struct MOLECULAR
   quantity dd ?
   atoms    ATOM2 5 dup (?)
ends

foo MOLECULAR


Actually, this definition of ATOM2 works within the struct macro, but there is a problem, that is after preprocess, above code(only the definition of foo) becomes:
Code:
label foo
        
        
        ;match,{foo.number dd ?}
        foo.number dd ?
        ;match any,{foo.number dd
        ; if~foo.number eq foo
        ; rb sizeof.MOLECULAR.number-($-foo.number)
        ; end if}
        
        
        ;match,{foo.atoms.@1.proton dd ?}
        foo.atoms.@1.proton dd ?
        ;match any,{foo.atoms.@1.proton dd
        ; if~foo.atoms.@1.proton eq foo
        ; rb sizeof.MOLECULAR.atoms.@1.proton-($-foo.atoms.@1.proton)
        ; end if}
        
        
        ;match,{foo.atoms.@1.electron dd ?}
        foo.atoms.@1.electron dd ?
        ;match any,{foo.atoms.@1.electron dd
        ; if~foo.atoms.@1.electron eq foo
        ; rb sizeof.MOLECULAR.atoms.@1.electron-($-foo.atoms.@1.electron)
        ; end if}
        
        
        ;match,{foo.atoms.@1.neutron dd ?}
        foo.atoms.@1.neutron dd ?
        ;match any,{foo.atoms.@1.neutron dd
        ; if~foo.atoms.@1.neutron eq foo
        ; rb sizeof.MOLECULAR.atoms.@1.neutron-($-foo.atoms.@1.neutron)
        ; end if}
        
        
        ;match,{foo.atoms.@2.proton dd ?}
        foo.atoms.@2.proton dd ?
        ;match any,{foo.atoms.@2.proton dd
        ; if~foo.atoms.@2.proton eq foo
        ; rb sizeof.MOLECULAR.atoms.@2.proton-($-foo.atoms.@2.proton)
        ; end if}
        
        
        ;match,{foo.atoms.@2.electron dd ?}
        foo.atoms.@2.electron dd ?
        ;match any,{foo.atoms.@2.electron dd
        ; if~foo.atoms.@2.electron eq foo
        ; rb sizeof.MOLECULAR.atoms.@2.electron-($-foo.atoms.@2.electron)
        ; end if}
        
        
        ;match,{foo.atoms.@2.neutron dd ?}
        foo.atoms.@2.neutron dd ?
        ;match any,{foo.atoms.@2.neutron dd
        ; if~foo.atoms.@2.neutron eq foo
        ; rb sizeof.MOLECULAR.atoms.@2.neutron-($-foo.atoms.@2.neutron)
        ; end if}
        
        
        ;match,{foo.atoms.@3.proton dd ?}
        foo.atoms.@3.proton dd ?
        ;match any,{foo.atoms.@3.proton dd
        ; if~foo.atoms.@3.proton eq foo
        ; rb sizeof.MOLECULAR.atoms.@3.proton-($-foo.atoms.@3.proton)
        ; end if}
        
        
        ;match,{foo.atoms.@3.electron dd ?}
        foo.atoms.@3.electron dd ?
        ;match any,{foo.atoms.@3.electron dd
        ; if~foo.atoms.@3.electron eq foo
        ; rb sizeof.MOLECULAR.atoms.@3.electron-($-foo.atoms.@3.electron)
        ; end if}
        
        
        ;match,{foo.atoms.@3.neutron dd ?}
        foo.atoms.@3.neutron dd ?
        ;match any,{foo.atoms.@3.neutron dd
        ; if~foo.atoms.@3.neutron eq foo
        ; rb sizeof.MOLECULAR.atoms.@3.neutron-($-foo.atoms.@3.neutron)
        ; end if}
        
        
        ;match,{foo.atoms.@4.proton dd ?}
        foo.atoms.@4.proton dd ?
        ;match any,{foo.atoms.@4.proton dd
        ; if~foo.atoms.@4.proton eq foo
        ; rb sizeof.MOLECULAR.atoms.@4.proton-($-foo.atoms.@4.proton)
        ; end if}
        
        
        ;match,{foo.atoms.@4.electron dd ?}
        foo.atoms.@4.electron dd ?
        ;match any,{foo.atoms.@4.electron dd
        ; if~foo.atoms.@4.electron eq foo
        ; rb sizeof.MOLECULAR.atoms.@4.electron-($-foo.atoms.@4.electron)
        ; end if}
        
        
        ;match,{foo.atoms.@4.neutron dd ?}
        foo.atoms.@4.neutron dd ?
        ;match any,{foo.atoms.@4.neutron dd
        ; if~foo.atoms.@4.neutron eq foo
        ; rb sizeof.MOLECULAR.atoms.@4.neutron-($-foo.atoms.@4.neutron)
        ; end if}
        
        
        ;match,{foo.atoms.@5.proton dd ?}
        foo.atoms.@5.proton dd ?
        ;match any,{foo.atoms.@5.proton dd
        ; if~foo.atoms.@5.proton eq foo
        ; rb sizeof.MOLECULAR.atoms.@5.proton-($-foo.atoms.@5.proton)
        ; end if}
        
        
        ;match,{foo.atoms.@5.electron dd ?}
        foo.atoms.@5.electron dd ?
        ;match any,{foo.atoms.@5.electron dd
        ; if~foo.atoms.@5.electron eq foo
        ; rb sizeof.MOLECULAR.atoms.@5.electron-($-foo.atoms.@5.electron)
        ; end if}
        
        
        ;match,{foo.atoms.@5.neutron dd ?}
        foo.atoms.@5.neutron dd ?
        ;match any,{foo.atoms.@5.neutron dd
        ; if~foo.atoms.@5.neutron eq foo
        ; rb sizeof.MOLECULAR.atoms.@5.neutron-($-foo.atoms.@5.neutron)
        ; end if}
        
        ;--------------------- not expected below --------------------------------

        ;match,{foo.atoms.proton dd ?}
        foo.atoms.proton dd ? 
        ;match any,{foo.atoms.proton dd
        ; if~foo.atoms.proton eq foo
        ; rb sizeof.MOLECULAR.atoms.proton-($-foo.atoms.proton)
        ; end if}
        
        
        ;match,{foo.atoms.electron dd ?}
        foo.atoms.electron dd ?
        ;match any,{foo.atoms.electron dd
        ; if~foo.atoms.electron eq foo
        ; rb sizeof.MOLECULAR.atoms.electron-($-foo.atoms.electron)
        ; end if}
        
        
        ;match,{foo.atoms.neutron dd ?}
        foo.atoms.neutron dd ?
        ;match any,{foo.atoms.neutron dd
        ; if~foo.atoms.neutron eq foo
        ; rb sizeof.MOLECULAR.atoms.neutron-($-foo.atoms.neutron)
        ; end if}


that is, one more set of ATOM2 members are generated. Sad
Post 05 Feb 2006, 08:46
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