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Index > Main > several structs how do?

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Roman



Joined: 21 Apr 2012
Posts: 1701
Roman 22 Dec 2022, 07:16
fasmw 1.73
Code:
struct a
a1 dd 0
ends

struct b
b1 db 0
ends

struct c
c1 db 0
ends

Hero a, b      ;fasm error
Hero2 c,b,a    ;fasm error
;in code
Mov [Hero.b1],1 ;fasm error
    
Post 22 Dec 2022, 07:16
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Roman



Joined: 21 Apr 2012
Posts: 1701
Roman 22 Dec 2022, 09:10
My variant:
Code:
;data
Hero    a
        b
        c

virtual at ecx
        s a
        e b
        d c
end virtual
                mov ecx,Hero
                mov [s.life],1
                mov [e.b1],1
                mov [d.c1],1 
    
Post 22 Dec 2022, 09:10
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 8340
Location: Kraków, Poland
Tomasz Grysztar 22 Dec 2022, 09:26
Perhaps this would suffice?
Code:
struct abc
  union
    struct
      a1 dd 0
    ends
    struct
      b1 db 0
    ends
    struct
      c1 db 0
    ends
  ends
ends

Hero abc

mov [Hero.b1],1
mov eax,[Hero.a1]    
Or, if you only need single fields and not whole structures, even simpler:
Code:
struct abc
  union
    a1 dd 0
    b1 db 0
    c1 db 0
  ends
ends    
But there is also a trick to do exactly what you asked for:
Code:
struc unionof names&
{
  .: macro label def \{ \}
  local size
  size = 0
  irp name, names
  \{
    virtual at .
      . name
      if $-. > size
        size = $-.
      end if
    end virtual
  \}
  rb size
  purge label
}


struct a
a1 dd 0
ends

struct b
b1 db 0
ends

struct c
c1 db 0
ends

Hero unionof a, b
Hero2 unionof c,b,a    
Post 22 Dec 2022, 09:26
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Roman



Joined: 21 Apr 2012
Posts: 1701
Roman 22 Dec 2022, 09:39
Quote:

Hero unionof a, b
Hero2 unionof c,b,a

Yes. This is I want !
Thanks.

For unionof not work times 5\repeat\rept 1000 { unionof c,b,a }

Code:
struc unionof num,names&
{
  .: macro label def \{ \}
  local size
  size = 0
  irp name, names
  \{
    virtual at .
      . name
      if $-. > size
        size = $-.
      end if
    end virtual
  \}
  rb size*num
  purge label
}

Hero unionof 8,a, b
    
Post 22 Dec 2022, 09:39
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