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-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- C S E T S --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2013, 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. --
-- --
------------------------------------------------------------------------------
package Csets is
pragma Elaborate_Body;
-- This package contains character tables for the various character
-- sets that are supported for source representation. Character and
-- string literals are not affected, only identifiers. For each set,
-- the table in this package gives the mapping of letters to their
-- upper case equivalent. Each table thus provides the information
-- for building the table used to fold lower case to upper case, and
-- also the table of flags showing which characters are allowed in
-- identifiers.
type Translate_Table is array (Character) of Character;
-- Type used to describe translate tables
type Char_Array_Flags is array (Character) of Boolean;
-- Type used for character attribute arrays. Note that we deliberately
-- do NOT pack this table, since we don't want the extra overhead of
-- accessing a packed bit string.
----------------------------------------------
-- Character Tables For Current Compilation --
----------------------------------------------
procedure Initialize;
-- Routine to initialize following character tables, whose content depends
-- on the character code being used to represent the source program. In
-- particular, the use of the upper half of the 8-bit code set varies.
-- The character set in use is specified by the value stored in
-- Opt.Identifier_Character_Set, which has the following settings:
-- '1' Latin-1 (ISO-8859-1)
-- '2' Latin-2 (ISO-8859-2)
-- '3' Latin-3 (ISO-8859-3)
-- '4' Latin-4 (ISO-8859-4)
-- '5' Cyrillic (ISO-8859-5)
-- 'p' IBM PC (code page 437)
-- '8' IBM PC (code page 850)
-- '9' Latin-9 (ISO-8859-15)
-- 'f' Full upper set (all distinct)
-- 'n' No upper characters (Ada/83 rules)
-- 'w' Latin-1 plus wide characters also allowed
function Is_Upper_Case_Letter (C : Character) return Boolean;
pragma Inline (Is_Upper_Case_Letter);
-- Determine if character is upper case letter
function Is_Lower_Case_Letter (C : Character) return Boolean;
pragma Inline (Is_Lower_Case_Letter);
-- Determine if character is lower case letter
Fold_Upper : Translate_Table;
-- Table to fold lower case identifier letters to upper case
Fold_Lower : Translate_Table;
-- Table to fold upper case identifier letters to lower case
Identifier_Char : Char_Array_Flags;
-- This table has True entries for all characters that can legally appear
-- in identifiers, including digits, the underline character, all letters
-- including upper and lower case and extended letters (as controlled by
-- the setting of Opt.Identifier_Character_Set), left bracket for brackets
-- notation wide characters and also ESC if wide characters are permitted
-- in identifiers using escape sequences starting with ESC.
end Csets;
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