+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- S Y S T E M . V A L _ E N U M --
--- --
--- S p e c --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 1992-2000, Free Software Foundation, Inc. --
--- --
--- GNAT is free software; you can redistribute it and/or modify it under --
--- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
--- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
--- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
--- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- This package is used to compute the Value attribute for enumeration types
--- other than those in packages Standard and System. See unit Exp_Imgv for
--- details of the format of constructed image tables.
-
-package System.Val_Enum is
-pragma Pure (Val_Enum);
-
- function Value_Enumeration_8
- (Names : String;
- Indexes : System.Address;
- Num : Natural;
- Str : String)
- return Natural;
- -- Used to compute Enum'Value (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 parameter Num is the value N - 1 (i.e. Enum'Pos (Enum'Last)).
- -- The reason that Indexes is passed by address is that the actual type
- -- is created on the fly by the expander.
- --
- -- Str is the argument of the attribute function, and may have leading
- -- and trailing spaces, and letters can be upper or lower case or mixed.
- -- If the image is found in Names, then the corresponding Pos value is
- -- returned. If not, Constraint_Error is raised.
-
- function Value_Enumeration_16
- (Names : String;
- Indexes : System.Address;
- Num : Natural;
- Str : String)
- return Natural;
- -- Identical to Value_Enumeration_8 except that it handles types
- -- using array (0 .. Num) of Natural_16 for the Indexes table.
-
- function Value_Enumeration_32
- (Names : String;
- Indexes : System.Address;
- Num : Natural;
- Str : String)
- return Natural;
- -- Identical to Value_Enumeration_8 except that it handles types
- -- using array (0 .. Num) of Natural_32 for the Indexes table.
-
-end System.Val_Enum;
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