compile subroutine WAFER_INV_LOT_QTY_VALID(ConvType, DataIo, Branch, ReturnedValue)
begin condition
pre:
post:
end condition

$insert logical
$insert wafer_inv_equ
$insert msg_equates
declare function msg, get_property, set_property
equ valid$         to 0    ;* successful
equ invalid_msg$   to 1    ;* bad data       -   print error message window
equ invalid_conv$  to 2    ;* bad conversion -          "         "
equ invalid_nomsg$ to 3    ;* bad but do not print the error message window
equ CrLf$          to char(13):char(10)
* this validates the wafer inventory number in windows like order and annual contracts
ReturnedValue = DataIo       
status() = Valid$              
*
begin case
   case ConvType = 'ICONV'
      QtyReceived = get_property( @window:'.QTY_RECEIVED', 'TEXT' )
      CurQty = sum( get_property( @window:'.INVENTORY_LOT_INFO', 'ARRAY' )<2> )
      if CurQty > QtyReceived then
          MsgInfo = ''
          MsgInfo<mtext$> = 'We only received ':QtyReceived:' and this entry would make it ':CurQty
          MsgInfo<micon$> = 'H'
          Void = msg( '', MsgInfo )
          status() = invalid_nomsg$
      end
   case ConvType = 'OCONV'
      * no output
      ReturnedValue = DataIo
   case otherwise$
      ReturnedValue = ''
      status() = invalid_conv$
end case
return