1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . V A L _ E N U M --
11 -- Copyright (C) 1992-2000, Free Software Foundation, Inc. --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 with Unchecked_Conversion;
37 with System.Val_Util; use System.Val_Util;
39 package body System.Val_Enum is
41 -------------------------
42 -- Value_Enumeration_8 --
43 -------------------------
45 function Value_Enumeration_8
47 Indexes : System.Address;
54 S : String (Str'Range) := Str;
56 type Natural_8 is range 0 .. 2 ** 7 - 1;
57 type Index_Table is array (Natural) of Natural_8;
58 type Index_Table_Ptr is access Index_Table;
60 function To_Index_Table_Ptr is
61 new Unchecked_Conversion (System.Address, Index_Table_Ptr);
63 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
66 Normalize_String (S, F, L);
68 for J in 0 .. Num loop
70 (Natural (IndexesT (J)) ..
71 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
77 raise Constraint_Error;
78 end Value_Enumeration_8;
80 --------------------------
81 -- Value_Enumeration_16 --
82 --------------------------
84 function Value_Enumeration_16
86 Indexes : System.Address;
93 S : String (Str'Range) := Str;
95 type Natural_16 is range 0 .. 2 ** 15 - 1;
96 type Index_Table is array (Natural) of Natural_16;
97 type Index_Table_Ptr is access Index_Table;
99 function To_Index_Table_Ptr is
100 new Unchecked_Conversion (System.Address, Index_Table_Ptr);
102 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
105 Normalize_String (S, F, L);
107 for J in 0 .. Num loop
109 (Natural (IndexesT (J)) ..
110 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
116 raise Constraint_Error;
117 end Value_Enumeration_16;
119 --------------------------
120 -- Value_Enumeration_32 --
121 --------------------------
123 function Value_Enumeration_32
125 Indexes : System.Address;
132 S : String (Str'Range) := Str;
134 type Natural_32 is range 0 .. 2 ** 31 - 1;
135 type Index_Table is array (Natural) of Natural_32;
136 type Index_Table_Ptr is access Index_Table;
138 function To_Index_Table_Ptr is
139 new Unchecked_Conversion (System.Address, Index_Table_Ptr);
141 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
144 Normalize_String (S, F, L);
146 for J in 0 .. Num loop
148 (Natural (IndexesT (J)) ..
149 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
155 raise Constraint_Error;
156 end Value_Enumeration_32;