77 lines
3.4 KiB
Ada
77 lines
3.4 KiB
Ada
|
------------------------------------------------------------------------------
|
||
|
|
-- --
|
||
|
|
-- GNAT COMPILER COMPONENTS --
|
||
|
|
-- --
|
||
|
|
-- S Y S T E M . V A L _ C H A R --
|
||
|
|
-- --
|
||
|
|
-- B o d y --
|
||
|
|
-- --
|
||
|
|
-- Copyright (C) 1992-2012, 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. --
|
||
|
|
-- --
|
||
|
|
-- 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. --
|
||
|
|
-- --
|
||
|
|
------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
with System.Val_Util; use System.Val_Util;
|
||
|
|
|
||
|
|
package body System.Val_Char is
|
||
|
|
|
||
|
|
---------------------
|
||
|
|
-- Value_Character --
|
||
|
|
---------------------
|
||
|
|
|
||
|
|
function Value_Character (Str : String) return Character is
|
||
|
|
F : Natural;
|
||
|
|
L : Natural;
|
||
|
|
S : String (Str'Range) := Str;
|
||
|
|
|
||
|
|
begin
|
||
|
|
Normalize_String (S, F, L);
|
||
|
|
|
||
|
|
-- Accept any single character enclosed in quotes
|
||
|
|
|
||
|
|
if L - F = 2 and then S (F) = ''' and then S (L) = ''' then
|
||
|
|
return Character'Val (Character'Pos (S (F + 1)));
|
||
|
|
|
||
|
|
-- Check control character cases
|
||
|
|
|
||
|
|
else
|
||
|
|
for C in Character'Val (16#00#) .. Character'Val (16#1F#) loop
|
||
|
|
if S (F .. L) = Character'Image (C) then
|
||
|
|
return C;
|
||
|
|
end if;
|
||
|
|
end loop;
|
||
|
|
|
||
|
|
for C in Character'Val (16#7F#) .. Character'Val (16#9F#) loop
|
||
|
|
if S (F .. L) = Character'Image (C) then
|
||
|
|
return C;
|
||
|
|
end if;
|
||
|
|
end loop;
|
||
|
|
|
||
|
|
if S (F .. L) = "SOFT_HYPHEN" then
|
||
|
|
return Character'Val (16#AD#);
|
||
|
|
end if;
|
||
|
|
|
||
|
|
Bad_Value (Str);
|
||
|
|
end if;
|
||
|
|
end Value_Character;
|
||
|
|
|
||
|
|
end System.Val_Char;
|