1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . V A L _ E N U M --
10 -- Copyright (C) 1992-2000, Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 with Unchecked_Conversion;
36 with System.Val_Util; use System.Val_Util;
38 package body System.Val_Enum is
40 -------------------------
41 -- Value_Enumeration_8 --
42 -------------------------
44 function Value_Enumeration_8
46 Indexes : System.Address;
53 S : String (Str'Range) := Str;
55 type Natural_8 is range 0 .. 2 ** 7 - 1;
56 type Index_Table is array (Natural) of Natural_8;
57 type Index_Table_Ptr is access Index_Table;
59 function To_Index_Table_Ptr is
60 new Unchecked_Conversion (System.Address, Index_Table_Ptr);
62 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
65 Normalize_String (S, F, L);
67 for J in 0 .. Num loop
69 (Natural (IndexesT (J)) ..
70 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
76 raise Constraint_Error;
77 end Value_Enumeration_8;
79 --------------------------
80 -- Value_Enumeration_16 --
81 --------------------------
83 function Value_Enumeration_16
85 Indexes : System.Address;
92 S : String (Str'Range) := Str;
94 type Natural_16 is range 0 .. 2 ** 15 - 1;
95 type Index_Table is array (Natural) of Natural_16;
96 type Index_Table_Ptr is access Index_Table;
98 function To_Index_Table_Ptr is
99 new Unchecked_Conversion (System.Address, Index_Table_Ptr);
101 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
104 Normalize_String (S, F, L);
106 for J in 0 .. Num loop
108 (Natural (IndexesT (J)) ..
109 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
115 raise Constraint_Error;
116 end Value_Enumeration_16;
118 --------------------------
119 -- Value_Enumeration_32 --
120 --------------------------
122 function Value_Enumeration_32
124 Indexes : System.Address;
131 S : String (Str'Range) := Str;
133 type Natural_32 is range 0 .. 2 ** 31 - 1;
134 type Index_Table is array (Natural) of Natural_32;
135 type Index_Table_Ptr is access Index_Table;
137 function To_Index_Table_Ptr is
138 new Unchecked_Conversion (System.Address, Index_Table_Ptr);
140 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
143 Normalize_String (S, F, L);
145 for J in 0 .. Num loop
147 (Natural (IndexesT (J)) ..
148 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
154 raise Constraint_Error;
155 end Value_Enumeration_32;