1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--                     S Y S T E M . C A S E _ U T I L                      --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--                     Copyright (C) 1995-2019, AdaCore                     --
10--                                                                          --
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.                                     --
17--                                                                          --
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.               --
21--                                                                          --
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/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32pragma Compiler_Unit_Warning;
33
34package body System.Case_Util is
35
36   --------------
37   -- To_Lower --
38   --------------
39
40   function To_Lower (A : Character) return Character is
41      A_Val : constant Natural := Character'Pos (A);
42
43   begin
44      if A in 'A' .. 'Z'
45        or else A_Val in 16#C0# .. 16#D6#
46        or else A_Val in 16#D8# .. 16#DE#
47      then
48         return Character'Val (A_Val + 16#20#);
49      else
50         return A;
51      end if;
52   end To_Lower;
53
54   procedure To_Lower (A : in out String) is
55   begin
56      for J in A'Range loop
57         A (J) := To_Lower (A (J));
58      end loop;
59   end To_Lower;
60
61   function To_Lower (A : String) return String is
62      Result : String := A;
63   begin
64      To_Lower (Result);
65      return Result;
66   end To_Lower;
67
68   --------------
69   -- To_Mixed --
70   --------------
71
72   procedure To_Mixed (A : in out String) is
73      Ucase : Boolean := True;
74
75   begin
76      for J in A'Range loop
77         if Ucase then
78            A (J) := To_Upper (A (J));
79         else
80            A (J) := To_Lower (A (J));
81         end if;
82
83         Ucase := A (J) = '_';
84      end loop;
85   end To_Mixed;
86
87   function To_Mixed (A : String) return String is
88      Result : String := A;
89   begin
90      To_Mixed (Result);
91      return Result;
92   end To_Mixed;
93
94   --------------
95   -- To_Upper --
96   --------------
97
98   function To_Upper (A : Character) return Character is
99      A_Val : constant Natural := Character'Pos (A);
100
101   begin
102      if A in 'a' .. 'z'
103        or else A_Val in 16#E0# .. 16#F6#
104        or else A_Val in 16#F8# .. 16#FE#
105      then
106         return Character'Val (A_Val - 16#20#);
107      else
108         return A;
109      end if;
110   end To_Upper;
111
112   procedure To_Upper (A : in out String) is
113   begin
114      for J in A'Range loop
115         A (J) := To_Upper (A (J));
116      end loop;
117   end To_Upper;
118
119   function To_Upper (A : String) return String is
120      Result : String := A;
121   begin
122      To_Upper (Result);
123      return Result;
124   end To_Upper;
125
126end System.Case_Util;
127