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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . C A S E _ U T I L --
-- --
-- B o d y --
-- --
-- Copyright (C) 1995-2023, AdaCore --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- Ghost code, loop invariants and assertions in this unit are meant for
-- analysis only, not for run-time checking, as it would be too costly
-- otherwise. This is enforced by setting the assertion policy to Ignore.
pragma Assertion_Policy (Ghost => Ignore,
Loop_Invariant => Ignore,
Assert => Ignore);
package body System.Case_Util
with SPARK_Mode
is
--------------
-- To_Lower --
--------------
function To_Lower (A : Character) return Character is
A_Val : constant Natural := Character'Pos (A);
begin
if A in 'A' .. 'Z'
or else A_Val in 16#C0# .. 16#D6#
or else A_Val in 16#D8# .. 16#DE#
then
return Character'Val (A_Val + 16#20#);
else
return A;
end if;
end To_Lower;
procedure To_Lower (A : in out String) is
begin
for J in A'Range loop
A (J) := To_Lower (A (J));
pragma Loop_Invariant
(for all K in A'First .. J => A (K) = To_Lower (A'Loop_Entry (K)));
end loop;
end To_Lower;
function To_Lower (A : String) return String is
Result : String := A;
begin
To_Lower (Result);
return Result;
end To_Lower;
--------------
-- To_Mixed --
--------------
procedure To_Mixed (A : in out String) is
Ucase : Boolean := True;
begin
for J in A'Range loop
if Ucase then
A (J) := To_Upper (A (J));
else
A (J) := To_Lower (A (J));
end if;
pragma Loop_Invariant
(for all K in A'First .. J =>
(if K = A'First
or else A'Loop_Entry (K - 1) = '_'
then
A (K) = To_Upper (A'Loop_Entry (K))
else
A (K) = To_Lower (A'Loop_Entry (K))));
Ucase := A (J) = '_';
end loop;
end To_Mixed;
function To_Mixed (A : String) return String is
Result : String := A;
begin
To_Mixed (Result);
return Result;
end To_Mixed;
--------------
-- To_Upper --
--------------
function To_Upper (A : Character) return Character is
A_Val : constant Natural := Character'Pos (A);
begin
if A in 'a' .. 'z'
or else A_Val in 16#E0# .. 16#F6#
or else A_Val in 16#F8# .. 16#FE#
then
return Character'Val (A_Val - 16#20#);
else
return A;
end if;
end To_Upper;
procedure To_Upper (A : in out String) is
begin
for J in A'Range loop
A (J) := To_Upper (A (J));
pragma Loop_Invariant
(for all K in A'First .. J => A (K) = To_Upper (A'Loop_Entry (K)));
end loop;
end To_Upper;
function To_Upper (A : String) return String is
Result : String := A;
begin
To_Upper (Result);
return Result;
end To_Upper;
end System.Case_Util;
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