1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M . W W D _ E N U M -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32-- This package contains routines used for Enumeration_Type'Wide_[Wide_]Width 33 34with System.WCh_Con; 35 36package System.WWd_Enum is 37 pragma Pure; 38 39 function Wide_Width_Enumeration_8 40 (Names : String; 41 Indexes : System.Address; 42 Lo, Hi : Natural; 43 EM : System.WCh_Con.WC_Encoding_Method) return Natural; 44 -- Used to compute Enum'Wide_Width where Enum is an enumeration subtype 45 -- other than those defined in package Standard. Names is a string with 46 -- a lower bound of 1 containing the characters of all the enumeration 47 -- literals concatenated together in sequence. Indexes is the address 48 -- of an array of type array (0 .. N) of Natural_8, where N is the 49 -- number of enumeration literals in the type. The Indexes values are 50 -- the starting subscript of each enumeration literal, indexed by Pos 51 -- values, with an extra entry at the end containing Names'Length + 1. 52 -- The reason that Indexes is passed by address is that the actual type 53 -- is created on the fly by the expander. 54 -- 55 -- Lo and Hi are the Pos values of the lower and upper bounds of the 56 -- subtype. The result is the value of Width, i.e. the maximum value 57 -- of the length of any enumeration literal in the given range. The 58 -- fifth parameter, EM, is the wide character encoding method used in 59 -- the Names table. 60 61 function Wide_Width_Enumeration_16 62 (Names : String; 63 Indexes : System.Address; 64 Lo, Hi : Natural; 65 EM : System.WCh_Con.WC_Encoding_Method) return Natural; 66 -- Identical to Wide_Width_Enumeration_8 except that it handles types 67 -- using array (0 .. Num) of Natural_16 for the Indexes table. 68 69 function Wide_Width_Enumeration_32 70 (Names : String; 71 Indexes : System.Address; 72 Lo, Hi : Natural; 73 EM : System.WCh_Con.WC_Encoding_Method) return Natural; 74 -- Identical to Wide_Width_Enumeration_8 except that it handles types 75 -- using array (0 .. Num) of Natural_32 for the Indexes table. 76 77 function Wide_Wide_Width_Enumeration_8 78 (Names : String; 79 Indexes : System.Address; 80 Lo, Hi : Natural; 81 EM : System.WCh_Con.WC_Encoding_Method) return Natural; 82 -- Same function for Wide_Wide_Width attribute 83 84 function Wide_Wide_Width_Enumeration_16 85 (Names : String; 86 Indexes : System.Address; 87 Lo, Hi : Natural; 88 EM : System.WCh_Con.WC_Encoding_Method) return Natural; 89 -- Same function for Wide_Wide_Width attribute 90 91 function Wide_Wide_Width_Enumeration_32 92 (Names : String; 93 Indexes : System.Address; 94 Lo, Hi : Natural; 95 EM : System.WCh_Con.WC_Encoding_Method) return Natural; 96 -- Same function for Wide_Wide_Width attribute 97 98end System.WWd_Enum; 99