-----------------------------------------------------------------------------
--  File: polyoutp.adb; see specification (polyoutp.ads)
-----------------------------------------------------------------------------

with Ada.Integer_Text_IO;               use Ada.Integer_Text_IO;

package body Polynomials.Output is

  use Ada.Text_IO;

  procedure Put (File: in Ada.Text_IO.File_Type; Item: in polynomial; Var: in String) is
    d: Integer:= Deg(Item); iti: field_elt;
    autres_termes: Boolean:= false;
  begin
    if d<0 then                 -- polynome nul
      Field_Put(File,zero);
    else
      for i in reverse 0..d loop
        iti:= Item(i);
        if iti/=zero then
          if autres_termes then 
            if iti>zero then
              Put(File," + "); 
            else
              Put(File," - "); iti:= -iti;
            end if;
          else 
            autres_termes:= true;
          end if;
          if iti=-one then
            Put(File,"-");
          elsif i=0 or iti/= one then
            Field_Put(File,iti);
          end if;
          case i is
            when 0 => null;
            when 1 => Put(File," " & Var);
            when others => Put(File," " & Var & "^"); Put(File,i,0);
          end case;
        end if;
      end loop;
    end if;
  end Put;

  procedure Put (Item: in polynomial; Var: in String) is
  begin   Put(Standard_Output, Item, Var );  end;

end;