Size of an array

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shaolin007

Joined: 03 Sep 2004
Posts: 65

shaolin007 21 Jun 2005, 20:56

Could someone show me example in FASM for getting the size of an array without manually calculating it each time?

Code:

array    db 20 dup (0)

21 Jun 2005, 20:56

Madis731

Joined: 25 Sep 2003
Posts: 2139
Location: Estonia

Madis731 21 Jun 2005, 22:24

Just:

Code:

array db 20 dup (0)
sizearr = $-array
;or make it persistent
sizearr dd $-array

21 Jun 2005, 22:24

shaolin007

Joined: 03 Sep 2004
Posts: 65

shaolin007 21 Jun 2005, 22:36

Hmm tried that and it seemed to have a detrimental effect when passed to a function in my code.

21 Jun 2005, 22:36

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8354
Location: Kraków, Poland

Tomasz Grysztar 21 Jun 2005, 22:52

Try the sample macro from section 2.3.4 of fasm's manual:

Code:

    struc db [data]
     {
       common
        . db data
        .size = $ - .
     }

after such definition this code:

Code:

array    db 20 dup (0)

will define array.size constant with value 20.

21 Jun 2005, 22:52

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