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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-widenu.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-widenu.ads | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-widenu.ads b/gcc-4.2.1/gcc/ada/s-widenu.ads new file mode 100644 index 000000000..ef6af7e51 --- /dev/null +++ b/gcc-4.2.1/gcc/ada/s-widenu.ads @@ -0,0 +1,75 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . W I D _ E N U M -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2005, 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, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, 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. -- +-- -- +------------------------------------------------------------------------------ + +-- This package contains the routine used for Enumeration_Type'Width + +package System.Wid_Enum is + pragma Pure; + + function Width_Enumeration_8 + (Names : String; + Indexes : System.Address; + Lo, Hi : Natural) + return Natural; + -- Used to compute Enum'Width where Enum is some enumeration subtype + -- other than those defined in package Standard. Names is a string with + -- a lower bound of 1 containing the characters of all the enumeration + -- literals concatenated together in sequence. Indexes is the address + -- of an array of type array (0 .. N) of Natural_8, where N is the + -- number of enumeration literals in the type. The Indexes values are + -- the starting subscript of each enumeration literal, indexed by Pos + -- values, with an extra entry at the end containing Names'Length + 1. + -- The reason that Indexes is passed by address is that the actual type + -- is created on the fly by the expander. + -- + -- Lo and Hi are the Pos values of the lower and upper bounds of the + -- subtype. The result is the value of Width, i.e. the maximum value + -- of the length of any enumeration literal in the given range. + + function Width_Enumeration_16 + (Names : String; + Indexes : System.Address; + Lo, Hi : Natural) + return Natural; + -- Identical to Width_Enumeration_8 except that it handles types + -- using array (0 .. Num) of Natural_16 for the Indexes table. + + function Width_Enumeration_32 + (Names : String; + Indexes : System.Address; + Lo, Hi : Natural) + return Natural; + -- Identical to Width_Enumeration_8 except that it handles types + -- using array (0 .. Num) of Natural_32 for the Indexes table. + +end System.Wid_Enum; |