------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- C S E T S -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2004 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 2, 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. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- 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 (Csets); -- 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' Latin-5 (ISO-8859-5, Cyrillic) -- 'p' IBM PC (code page 437) -- '8' IBM PC (code page 850) -- '9' Latin-9 (ISO-9959-9) -- '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;