It seems impossible to declare a structure that contains an array of other structures (unless I am missing some trick).
ONE STRUCT
a DD
b DD
ENDS
TWO STRUCT
c DD
d ONE 3 DUP
ENDS
DATA SECTION
example TWO
CODE SECTION
Start:
xor eax,eax
ret
Quote
GoAsm.Exe Version 0.56.8 - Copyright Jeremy Gordon 2001/9 - JG@JGnet.co.uk
Error!
Line 14 of assembler source file (struct.asm):-
Must use <> or {} brackets when initialising structure or union
In the struct at Line 6 of assembler source file (struct.asm)
I tried to initialize it in two ways, but none of them worked (and the error message was the same as above):
example TWO <0,<0,0>,<0,0>,<0,0>>
example TWO <0,<<0,0>,<0,0>,<0,0>>>
Even if they had worked, it would be no solution to my real situation where the array should contain 256 structures.
The help file has no example of this type of structure, so it's probably just not implemented. In my opinion, it would be a useful feature. But as Jeremy seems to have left forever, I am getting desperate with all these struct/union problems. :'(
Hi Yuri,
Weird one, can't even get MASM to do it...
ONE STRUCT
a DD ?
b DD ?
ONE ENDS
TWO STRUCT
c DD ?
d ONE 256 DUP (<>)
TWO ENDS
.data?
testtwo TWO <>
Any attempt to initialize data in the structure gets me a "error A2177: nested structure improperly initialized". This seems to be the same behavior as in GoAsm except that in GoAsm you can't even name the nested structure member...
ONE STRUCT
a DD
b DD
ENDS
TWO STRUCT
c DD
ONE 256 DUP <>
ENDS
DATA SECTION
testtwo TWO <>
"SIZEOF testtwo" returns 2052 in both GoAsm and MASM.
To get the nested structure named you could do this:
ONE STRUCT
a DD
b DD
ENDS
TWO STRUCT
c DD
d ONE <>
ONE 255 DUP <>
ENDS
Edgar
Yes, this way it works! :bg Thanks, Edgar! :clap:
Wouldn't this work also?
ONE STRUCT
a DD ?
b DD ?
ONE ENDS
TWO STRUCT
c DD ?
d 256 DUP ONE
TWO ENDS
I would be much surprised if it worked. But it doesn't, at least in GoAsm.
Quote
Error!
Line 14 of assembler source file (struct.asm):-
Invalid data/structure/union declaration in implementation of structure:-
d 256 DUP ONE
In the struct at Line 6 of assembler source file (struct.asm)
This works in Masm.
include \masm32\include\masm32rt.inc
ONE STRUCT
za DD ?
zb DD ?
ONE ENDS
TWO STRUCT
zc DD ?
zd ONE 20 dup(<?>)
TWO ENDS
.data
MyTwo TWO <>
element = SIZEOF ONE
.code
AppName db "Masm32:", 0
start: mov MyTwo.zc, 123
mov MyTwo.zd[19*element].za, 123
print str$(MyTwo.zd[19*element].za)
inkey " OK"
exit
end start
Hi jj2007,
Yes, it works in GoAsm as well, the problem was in initializing it not accessing it. ie:
ONE STRUCT
a DD
b DD
ENDS
TWO STRUCT
c DD
d ONE <>
ONE 255 DUP <>
ENDS
DATA SECTION
testtwo TWO <>
CODE SECTION
mov D[testtwo.d+(SIZEOF ONE*19)+ONE.b],1
; or more clearly...
mov D[testtwo.d.b+(SIZEOF ONE*19)],1
; or even...
mov D[(SIZEOF ONE*19)+testtwo.d.b],1
Edgar
With structures like ACCEL (it's 6 bytes in size), you just can't make up an array because GoAsm aligns each structure on a dword boundary, so that it actually consumes 8 bytes. Due to this, only the first accelerator will work. Finally I had to use plain DW instead.
#dynamiclinkfile msvcrt.dll
ACCEL STRUCT
fVirt DW ; fVirt is DB in the headers, but it needs
key DW ; an alignment byte after it.
cmd DW
ENDS
DATA SECTION
Accels ACCEL <1,2,3>,<4,5,6>,<7,8,9>
cAccels DD sizeof Accels / sizeof ACCEL
CODE SECTION
Start:
invoke printf, "Array size: %d, structures in array: %d", \
sizeof Accels, [cAccels]
add esp,0Ch
ret
printf's output:
Quote
Array size: 22, structures in array: 4