File : s-wchcon.adb
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . W C H _ C O N --
-- --
-- B o d y --
-- --
-- Copyright (C) 2005-2009, Free Software Foundation, Inc. --
-- --
-- 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. --
-- --
-- --
-- --
-- --
-- --
-- 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. --
-- --
------------------------------------------------------------------------------
pragma Compiler_Unit;
package body System.WCh_Con is
----------------------------
-- Get_WC_Encoding_Method --
----------------------------
function Get_WC_Encoding_Method (C : Character) return WC_Encoding_Method is
begin
for Method in WC_Encoding_Method loop
if C = WC_Encoding_Letters (Method) then
return Method;
end if;
end loop;
raise Constraint_Error;
end Get_WC_Encoding_Method;
function Get_WC_Encoding_Method (S : String) return WC_Encoding_Method is
begin
if S = "hex" then
return WCEM_Hex;
elsif S = "upper" then
return WCEM_Upper;
elsif S = "shift_jis" then
return WCEM_Shift_JIS;
elsif S = "euc" then
return WCEM_EUC;
elsif S = "utf8" then
return WCEM_UTF8;
elsif S = "brackets" then
return WCEM_Brackets;
else
raise Constraint_Error;
end if;
end Get_WC_Encoding_Method;
--------------------------
-- Is_Start_Of_Encoding --
--------------------------
function Is_Start_Of_Encoding
(C : Character;
EM : WC_Encoding_Method) return Boolean
is
begin
return (EM in WC_Upper_Half_Encoding_Method
and then Character'Pos (C) >= 16#80#)
or else (EM in WC_ESC_Encoding_Method and then C = ASCII.ESC);
end Is_Start_Of_Encoding;
end System.WCh_Con;