PureBasic Forum

;==================================================================
; ###  Example to use variable parameters for Procedures    ###
; Author:            Thomas <ts-soft> Schulz
; Date:              Mrz 16, 2012
; Version:           1.0
; Target OS:         All
; Target Compiler:   PureBasic 4.40 and later
;==================================================================

EnableExplicit

Structure V_ARG
  Type.l
  StructureUnion
    a.a
    b.b
    c.c
    d.d
    f.f
    i.i
    l.l
    *s.String
    q.q
    u.u
    w.w
  EndStructureUnion
EndStructure

Procedure V_ARG_Add(Array V_ARG.V_ARG(1), Type.l, *value)
  Protected index = ArraySize(V_ARG())
  Protected *v.Quad = *value
  ReDim V_ARG(index + 1)

  With V_ARG(index)
    \Type = Type
    \q = *v\q
  EndWith
EndProcedure

; example
Procedure Foo(Array V_ARG.V_ARG(1))
  Protected i
  Protected count = ArraySize(V_ARG())
  Debug "Count of parameters: " + Str(count)
  Debug ""
  For i = 0 To count - 1
    With V_ARG(i)
      Select \Type
        Case #PB_Ascii
          Debug "Parameter " + Str(i + 1) + " = UByte, Value = " + Str(V_ARG(i)\a)
        Case #PB_Byte
          Debug "Parameter " + Str(i + 1) + " = Byte, Value = " + Str(V_ARG(i)\b)
        Case #PB_Character
          Debug "Parameter " + Str(i + 1) + " = Char, Value = " + Str(V_ARG(i)\c)
        Case #PB_Double
          Debug "Parameter " + Str(i + 1) + " = Double, Value = " + StrD(V_ARG(i)\d)
        Case #PB_Float
          Debug "Parameter " + Str(i + 1) + " = FLoat, Value = " + StrF(V_ARG(i)\f)
        Case #PB_Integer
          Debug "Parameter " + Str(i + 1) + " = Integer, Value = " + Str(V_ARG(i)\i)
        Case #PB_Long
          Debug "Parameter " + Str(i + 1) + " = Long, Value = " + Str(V_ARG(i)\l)
        Case #PB_Quad
          Debug "Parameter" + Str(i + 1) + " = Quad, Value = " + Str(V_ARG(i)\q)
        Case #PB_String
          Debug "Parameter " + Str(i + 1) + " = String, Value = " + PeekS(V_ARG(i)\s)
        Case #PB_Unicode
          Debug "Parameter " + Str(i + 1) + " = UWord, Value = " + Str(V_ARG(i)\u)
        Case #PB_Word
          Debug "Parameter " + Str(i + 1) + " = Word, Value = " + Str(V_ARG(i)\w)
      EndSelect
    EndWith
  Next
EndProcedure

Dim para_array.V_ARG(0)

Define Text.String
Text\s = "Feel the ..Pure.. Power"
V_ARG_Add(para_array(), #PB_String, @Text)

Define pi.d = #PI
V_ARG_Add(para_array(), #PB_Double, @pi)

Define word.w = 65535
V_ARG_Add(para_array(), #PB_Word, @word)
V_ARG_Add(para_array(), #PB_Unicode, @word)

Foo(para_array())