/*
Example code for if/elseif/else/endif

Zeus supports conditional execution using if/else/endif, and elseif.

Sometimes we want to have optional parts of a source... Maybe we want to have
different graphics depending on the release. Forbidden Planet was released with
Krell-style power meters, but only an assembly option away were trumpeting elephants.

So, here is an example:
*/

WantElephants   equ true        ; Could also be a variable
WantBIGOnes     equ true        ; Could also be a variable

zeusprint "First case"

        if WantElephants
                call DrawElephants : zeusprint "Elephants"
        else
                call DrawKrell : zeusprint "Krell"
        endif

zeusprint ""

; You can nest if statements, if you really want to confuse yourself.

zeusprint "Second case"

        if WantElephants
          if WantBIGOnes
                call DrawBigElephants : zeusprint "Big Elephants"
          else
                call DrawSmallElephants : zeusprint "Small Elephants"
          endif
        else
          if WantBIGOnes
                call DrawBigKrell : zeusprint "Big Krell"
          else
                call DrawKrell : zeusprint "Krell"
          endif
        endif

zeusprint ""

; Zeus also supports if/elseif/else/endif

WantDogs        equ true
WantCats        equ false
WantFrogs       equ false

zeusprint "Third case"

        if WantDogs
                call DrawDogs   : zeusprint "Dogs"
        elseif WantCats
                call DrawCats   : zeusprint "Cats"
        elseif WantFrogs
                call DrawFrogs  : zeusprint "Frogs"
        else
          zeusprint "No pets..."
        endif

zeusprint ""

; Support bits. Note that these are also conditional, so you only have the code
; you actually need.

        if def WantElephants
DrawElephants           ret             ;
DrawSmallElephants      ret             ;
DrawBigElephants        ret             ;
        else
DrawKrell               ret             ;
DrawBigKrell            ret             ;
        endif

; These could be but I'm tired ;)

DrawRhinos              ret             ;
DrawDogs                ret             ;
DrawFrogs               ret             ;
DrawCats                ret             ;

; Should demonstrate "DEF" here.