1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . V A L _ E N U M --
9 -- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 with Ada.Unchecked_Conversion;
33 with System.Val_Util; use System.Val_Util;
35 package body System.Val_Enum is
37 -------------------------
38 -- Value_Enumeration_8 --
39 -------------------------
41 function Value_Enumeration_8
43 Indexes : System.Address;
50 S : String (Str'Range) := Str;
52 type Natural_8 is range 0 .. 2 ** 7 - 1;
53 type Index_Table is array (Natural) of Natural_8;
54 type Index_Table_Ptr is access Index_Table;
56 function To_Index_Table_Ptr is
57 new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
59 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
62 Normalize_String (S, F, L);
64 for J in 0 .. Num loop
66 (Natural (IndexesT (J)) ..
67 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
73 raise Constraint_Error;
74 end Value_Enumeration_8;
76 --------------------------
77 -- Value_Enumeration_16 --
78 --------------------------
80 function Value_Enumeration_16
82 Indexes : System.Address;
89 S : String (Str'Range) := Str;
91 type Natural_16 is range 0 .. 2 ** 15 - 1;
92 type Index_Table is array (Natural) of Natural_16;
93 type Index_Table_Ptr is access Index_Table;
95 function To_Index_Table_Ptr is
96 new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
98 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
101 Normalize_String (S, F, L);
103 for J in 0 .. Num loop
105 (Natural (IndexesT (J)) ..
106 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
112 raise Constraint_Error;
113 end Value_Enumeration_16;
115 --------------------------
116 -- Value_Enumeration_32 --
117 --------------------------
119 function Value_Enumeration_32
121 Indexes : System.Address;
128 S : String (Str'Range) := Str;
130 type Natural_32 is range 0 .. 2 ** 31 - 1;
131 type Index_Table is array (Natural) of Natural_32;
132 type Index_Table_Ptr is access Index_Table;
134 function To_Index_Table_Ptr is
135 new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
137 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
140 Normalize_String (S, F, L);
142 for J in 0 .. Num loop
144 (Natural (IndexesT (J)) ..
145 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
151 raise Constraint_Error;
152 end Value_Enumeration_32;