Constants within macros

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pini

Joined: 04 Jul 2005
Posts: 14

pini 27 Jul 2005, 16:30

Is it possible to export constants (symbolic or not) from within a macro, with name taken from parameters ?
For example, if I define something like this:

Code:

my_macro constant_name, constant_value
{
; Do stuff here
constant_name = constant_value ;or whatever computation
; Do stuff here
}

A call to 'my_macro MY_CONSTANT, 0x100' is meant to extend to someting like MY_CONSTANT = 0x100, so that MY_CONSTANT is available elsewhere in the code.

I know the above syntax is wrong, but you get the idea. If it's possible, I'd really like to know how.

Thanks is advance.

pini[/img]

27 Jul 2005, 16:30

Frank

Joined: 17 Jun 2003
Posts: 100

Frank 27 Jul 2005, 17:42

It is possible, see the example below.

Code:

; Declare two macros
macro my_numeric constant_name, constant_value
{ constant_name = constant_value }

macro my_symbolic constant_name, constant_value
{ constant_name equ constant_value }

; Apply the macros
my_numeric A_NUMERIC, 0x100
my_symbolic A_SYMBOLIC, SomeString

; Test the results
if (defined A_NUMERIC)
  display 'A_NUMERIC is defined',13,10
end if

if (A_NUMERIC = 100h)
  display 'A_NUMERIC equals 100h',13,10
end if

if (defined A_SYMBOLIC)
  display 'A_SYMBOLIC is defined',13,10
end if

if (A_SYMBOLIC eq SomeString)
  display 'A_SYMBOLIC equals SomeString',13,10
end if

Note that the output differs slightly for numerical constants versus symbolic constants:

Code:

A_NUMERIC is defined
A_NUMERIC equals 100h
A_SYMBOLIC equals SomeString

Regards

Frank

27 Jul 2005, 17:42

pini

Joined: 04 Jul 2005
Posts: 14

pini 27 Jul 2005, 20:15

You're right, it works ! I don't know what I did wrong when I tested it, anyway it doesn't really matter Smile

Thanks a lot

pini

27 Jul 2005, 20:15

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