File : s-imenne.ads


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--                         GNAT RUN-TIME COMPONENTS                         --
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--  Enumeration_Type'Image for all enumeration types except those in package
--  Standard (where we have no opportunity to build image tables), and in
--  package System (where it is too early to start building image tables).
--  Special routines exist for the enumeration types in these packages.

--  This is the new version of the package, for use by compilers built after
--  Nov 21st, 2007, which provides procedures that avoid using the secondary
--  stack. The original package System.Img_Enum is maintained in the sources
--  for bootstrapping with older versions of the compiler which expect to find
--  functions in this package.

pragma Compiler_Unit;

package System.Img_Enum_New is
   pragma Pure;

   procedure Image_Enumeration_8
     (Pos     : Natural;
      S       : in out String;
      P       : out Natural;
      Names   : String;
      Indexes : System.Address);
   --  Used to compute Enum'Image (Str) where Enum is some enumeration type
   --  other than those defined in package Standard. Names is a string with
   --  a lower bound of 1 containing the characters of all the enumeration
   --  literals concatenated together in sequence. Indexes is the address of
   --  an array of type array (0 .. N) of Natural_8, where N is the number of
   --  enumeration literals in the type. The Indexes values are the starting
   --  subscript of each enumeration literal, indexed by Pos values, with an
   --  extra entry at the end containing Names'Length + 1. The reason that
   --  Indexes is passed by address is that the actual type is created on the
   --  fly by the expander. The desired 'Image value is stored in S (1 .. P)
   --  and P is set on return. The caller guarantees that S is long enough to
   --  hold the result and that the lower bound is 1.

   procedure Image_Enumeration_16
     (Pos     : Natural;
      S       : in out String;
      P       : out Natural;
      Names   : String;
      Indexes : System.Address);
   --  Identical to Set_Image_Enumeration_8 except that it handles types using
   --  array (0 .. Num) of Natural_16 for the Indexes table.

   procedure Image_Enumeration_32
     (Pos     : Natural;
      S       : in out String;
      P       : out Natural;
      Names   : String;
      Indexes : System.Address);
   --  Identical to Set_Image_Enumeration_8 except that it handles types using
   --  array (0 .. Num) of Natural_32 for the Indexes table.

end System.Img_Enum_New;