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

$insert logical
declare function msg
equ valid$         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

ReturnedValue = DataIo       
status() = Valid$              
ValidTables = xlate( 'CONFIG', 'TABLENAMES', 1, 'X' )
*
begin case
   case ConvType = 'ICONV'
      locate DataIo in ValidTables using @vm setting Fpos else
         status() = invalid_msg$
      end
   case ConvType = 'OCONV'
      * no output
      ReturnedValue = DataIo
   case otherwise$
      ReturnedValue = ''
      status() = invalid_conv$
end case
return