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134 lines
5.7 KiB
Ada
134 lines
5.7 KiB
Ada
--- /dev/null Fri Feb 8 20:51:30 2002
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+++ s-imgenu.adb Fri Feb 8 20:53:07 2002
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@@ -0,0 +1,130 @@
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+------------------------------------------------------------------------------
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+-- --
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+-- GNAT RUNTIME COMPONENTS --
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+-- --
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+-- S Y S T E M . I M G _ E N U M --
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+-- --
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+-- B o d y --
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+-- --
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+-- $Revision: 1.2 $
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+-- --
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+-- Copyright (C) 2000 Free Software Foundation, Inc. --
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+-- --
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+-- GNAT is free software; you can redistribute it and/or modify it under --
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+-- terms of the GNU General Public License as published by the Free Soft- --
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+-- ware Foundation; either version 2, or (at your option) any later ver- --
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+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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+-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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+-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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+-- for more details. You should have received a copy of the GNU General --
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+-- Public License distributed with GNAT; see file COPYING. If not, write --
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+-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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+-- MA 02111-1307, USA. --
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+-- --
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+-- As a special exception, if other files instantiate generics from this --
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+-- unit, or you link this unit with other files to produce an executable, --
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+-- this unit does not by itself cause the resulting executable to be --
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+-- covered by the GNU General Public License. This exception does not --
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+-- however invalidate any other reasons why the executable file might be --
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+-- covered by the GNU Public License. --
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+-- --
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+-- GNAT was originally developed by the GNAT team at New York University. --
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+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
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+-- --
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+------------------------------------------------------------------------------
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+
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+with Unchecked_Conversion;
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+
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+package body System.Img_Enum is
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+
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+ -------------------------
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+ -- Image_Enumeration_8 --
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+ -------------------------
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+
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+ function Image_Enumeration_8
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+ (Pos : Natural;
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+ Names : String;
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+ Indexes : System.Address)
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+ return String
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+ is
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+ type Natural_8 is range 0 .. 2 ** 7 - 1;
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+ type Index_Table is array (Natural) of Natural_8;
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+ type Index_Table_Ptr is access Index_Table;
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+
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+ function To_Index_Table_Ptr is
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+ new Unchecked_Conversion (System.Address, Index_Table_Ptr);
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+
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+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
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+
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+ Start : Natural := Natural (IndexesT (Pos));
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+ Next : Natural := Natural (IndexesT (Pos + 1));
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+
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+ subtype Result_Type is String (1 .. Next - Start);
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+ -- We need this result type to force the result to have the
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+ -- required lower bound of 1, rather than the slice bounds.
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+
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+ begin
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+ return Result_Type (Names (Start .. Next - 1));
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+ end Image_Enumeration_8;
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+
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+ --------------------------
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+ -- Image_Enumeration_16 --
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+ --------------------------
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+
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+ function Image_Enumeration_16
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+ (Pos : Natural;
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+ Names : String;
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+ Indexes : System.Address)
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+ return String
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+ is
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+ type Natural_16 is range 0 .. 2 ** 15 - 1;
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+ type Index_Table is array (Natural) of Natural_16;
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+ type Index_Table_Ptr is access Index_Table;
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+
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+ function To_Index_Table_Ptr is
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+ new Unchecked_Conversion (System.Address, Index_Table_Ptr);
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+
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+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
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+
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+ Start : Natural := Natural (IndexesT (Pos));
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+ Next : Natural := Natural (IndexesT (Pos + 1));
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+
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+ subtype Result_Type is String (1 .. Next - Start);
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+ -- We need this result type to force the result to have the
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+ -- required lower bound of 1, rather than the slice bounds.
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+
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+ begin
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+ return Result_Type (Names (Start .. Next - 1));
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+ end Image_Enumeration_16;
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+
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+ --------------------------
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+ -- Image_Enumeration_32 --
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+ --------------------------
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+
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+ function Image_Enumeration_32
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+ (Pos : Natural;
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+ Names : String;
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+ Indexes : System.Address)
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+ return String
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+ is
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+ type Natural_32 is range 0 .. 2 ** 31 - 1;
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+ type Index_Table is array (Natural) of Natural_32;
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+ type Index_Table_Ptr is access Index_Table;
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+
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+ function To_Index_Table_Ptr is
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+ new Unchecked_Conversion (System.Address, Index_Table_Ptr);
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+
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+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
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+
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+ Start : Natural := Natural (IndexesT (Pos));
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+ Next : Natural := Natural (IndexesT (Pos + 1));
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+
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+ subtype Result_Type is String (1 .. Next - Start);
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+ -- We need this result type to force the result to have the
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+ -- required lower bound of 1, rather than the slice bounds.
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+
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+ begin
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+ return Result_Type (Names (Start .. Next - 1));
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+ end Image_Enumeration_32;
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+
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+end System.Img_Enum;
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